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fune/layout/base/nsPresShell.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=2 sw=2 et tw=78:
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Clark <buster@netscape.com>
* Håkan Waara <hwaara@chello.se>
* Dan Rosen <dr@netscape.com>
* Daniel Glazman <glazman@netscape.com>
* Mats Palmgren <mats.palmgren@bredband.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 05/03/2000 IBM Corp. Observer events for reflow states
*/
/* a presentation of a document, part 2 */
#define PL_ARENA_CONST_ALIGN_MASK 3
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDOMXULDocument.h"
#include "nsStubDocumentObserver.h"
#include "nsStyleSet.h"
#include "nsICSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please?
#include "nsIDOMCSSStyleSheet.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsINameSpaceManager.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsIServiceManager.h"
#include "nsFrame.h"
#include "nsIViewManager.h"
#include "nsCRT.h"
#include "nsCRTGlue.h"
#include "prlog.h"
#include "prmem.h"
#include "prprf.h"
#include "prinrval.h"
#include "nsTArray.h"
#include "nsCOMArray.h"
#include "nsHashtable.h"
#include "nsIViewObserver.h"
#include "nsContainerFrame.h"
#include "nsIDeviceContext.h"
#include "nsEventStateManager.h"
#include "nsDOMEvent.h"
#include "nsGUIEvent.h"
#include "nsHTMLParts.h"
#include "nsContentUtils.h"
#include "nsISelection.h"
#include "nsISelectionController.h"
#include "nsISelectionPrivate.h"
#include "nsLayoutCID.h"
#include "nsGkAtoms.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOM3Node.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMElement.h"
#include "nsRange.h"
#include "nsCSSPseudoElements.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsWeakReference.h"
#include "nsIPageSequenceFrame.h"
#include "nsCaret.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIXPointer.h"
#include "nsIDOMXMLDocument.h"
#include "nsIScrollableView.h"
#include "nsIParser.h"
#include "nsParserCIID.h"
#include "nsFrameSelection.h"
#include "nsIDOMNSHTMLInputElement.h" //optimization for ::DoXXX commands
#include "nsIDOMNSHTMLTextAreaElement.h"
#include "nsViewsCID.h"
#include "nsFrameManager.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsILayoutHistoryState.h"
#include "nsILineIterator.h" // for ScrollContentIntoView
#include "nsTimer.h"
#include "nsWeakPtr.h"
#include "plarena.h"
#include "pldhash.h"
#include "nsIObserverService.h"
#include "nsIObserver.h"
#include "nsIDocShell.h" // for reflow observation
#include "nsIBaseWindow.h"
#include "nsLayoutErrors.h"
#include "nsLayoutUtils.h"
#include "nsCSSRendering.h"
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
// for |#ifdef DEBUG| code
#include "prenv.h"
#include "nsIAttribute.h"
#include "nsIGlobalHistory2.h"
#include "nsDisplayList.h"
#include "nsIRegion.h"
#include "nsRegion.h"
#ifdef MOZ_REFLOW_PERF
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#endif
#include "nsIReflowCallback.h"
#include "nsPIDOMWindow.h"
#include "nsFocusManager.h"
#include "nsIPluginInstance.h"
#include "nsIObjectFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsNetUtil.h"
#include "nsEventDispatcher.h"
#include "nsThreadUtils.h"
#include "nsStyleSheetService.h"
#include "gfxImageSurface.h"
#include "gfxContext.h"
#ifdef MOZ_MEDIA
#include "nsHTMLMediaElement.h"
#endif
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsIClipboardHelper.h"
#include "nsIDocShellTreeItem.h"
#include "nsIURI.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
#include "nsIDragService.h"
#include "nsCopySupport.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsITimer.h"
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#include "nsIAccessible.h"
#include "nsIAccessibleEvent.h"
#endif
// For style data reconstruction
#include "nsStyleChangeList.h"
#include "nsCSSFrameConstructor.h"
#ifdef MOZ_XUL
#include "nsMenuFrame.h"
#include "nsTreeBodyFrame.h"
#include "nsIBoxObject.h"
#include "nsITreeBoxObject.h"
#include "nsMenuPopupFrame.h"
#include "nsITreeColumns.h"
#include "nsIDOMXULMultSelectCntrlEl.h"
#include "nsIDOMXULSelectCntrlItemEl.h"
#include "nsIDOMXULMenuListElement.h"
#endif
#include "nsPlaceholderFrame.h"
// Content viewer interfaces
#include "nsIContentViewer.h"
#include "imgIEncoder.h"
#include "gfxPlatform.h"
#include "nsContentCID.h"
static NS_DEFINE_CID(kCSSStyleSheetCID, NS_CSS_STYLESHEET_CID);
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
PRBool nsIPresShell::gIsAccessibilityActive = PR_FALSE;
// convert a color value to a string, in the CSS format #RRGGBB
// * - initially created for bugs 31816, 20760, 22963
static void ColorToString(nscolor aColor, nsAutoString &aString);
// Class ID's
static NS_DEFINE_CID(kFrameSelectionCID, NS_FRAMESELECTION_CID);
// RangePaintInfo is used to paint ranges to offscreen buffers
struct RangePaintInfo {
nsCOMPtr<nsIRange> mRange;
nsDisplayListBuilder mBuilder;
nsDisplayList mList;
// offset of builder's reference frame to the root frame
nsPoint mRootOffset;
RangePaintInfo(nsIRange* aRange, nsIFrame* aFrame)
: mRange(aRange), mBuilder(aFrame, PR_FALSE, PR_FALSE)
{
}
~RangePaintInfo()
{
mList.DeleteAll();
}
};
#undef NOISY
// ----------------------------------------------------------------------
#ifdef NS_DEBUG
// Set the environment variable GECKO_VERIFY_REFLOW_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static PRUint32 gVerifyReflowFlags;
struct VerifyReflowFlags {
const char* name;
PRUint32 bit;
};
static const VerifyReflowFlags gFlags[] = {
{ "verify", VERIFY_REFLOW_ON },
{ "reflow", VERIFY_REFLOW_NOISY },
{ "all", VERIFY_REFLOW_ALL },
{ "list-commands", VERIFY_REFLOW_DUMP_COMMANDS },
{ "noisy-commands", VERIFY_REFLOW_NOISY_RC },
{ "really-noisy-commands", VERIFY_REFLOW_REALLY_NOISY_RC },
{ "resize", VERIFY_REFLOW_DURING_RESIZE_REFLOW },
};
#define NUM_VERIFY_REFLOW_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowVerifyReflowFlags()
{
printf("Here are the available GECKO_VERIFY_REFLOW_FLAGS:\n");
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
printf(" %s\n", flag->name);
++flag;
}
printf("Note: GECKO_VERIFY_REFLOW_FLAGS is a comma separated list of flag\n");
printf("names (no whitespace)\n");
}
#endif
//========================================================================
//========================================================================
//========================================================================
#ifdef MOZ_REFLOW_PERF
class ReflowCountMgr;
static const char kGrandTotalsStr[] = "Grand Totals";
// Counting Class
class ReflowCounter {
public:
ReflowCounter(ReflowCountMgr * aMgr = nsnull);
~ReflowCounter();
void ClearTotals();
void DisplayTotals(const char * aStr);
void DisplayDiffTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void Add() { mTotal++; }
void Add(PRUint32 aTotal) { mTotal += aTotal; }
void CalcDiffInTotals();
void SetTotalsCache();
void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; }
PRUint32 GetTotal() { return mTotal; }
protected:
void DisplayTotals(PRUint32 aTotal, const char * aTitle);
void DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle);
PRUint32 mTotal;
PRUint32 mCacheTotal;
ReflowCountMgr * mMgr; // weak reference (don't delete)
};
// Counting Class
class IndiReflowCounter {
public:
IndiReflowCounter(ReflowCountMgr * aMgr = nsnull)
: mFrame(nsnull),
mCount(0),
mMgr(aMgr),
mCounter(aMgr),
mHasBeenOutput(PR_FALSE)
{}
virtual ~IndiReflowCounter() {}
nsAutoString mName;
nsIFrame * mFrame; // weak reference (don't delete)
PRInt32 mCount;
ReflowCountMgr * mMgr; // weak reference (don't delete)
ReflowCounter mCounter;
PRBool mHasBeenOutput;
};
//--------------------
// Manager Class
//--------------------
class ReflowCountMgr {
public:
ReflowCountMgr();
virtual ~ReflowCountMgr();
void ClearTotals();
void ClearGrandTotals();
void DisplayTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void DisplayDiffsInTotals(const char * aStr);
void Add(const char * aName, nsIFrame * aFrame);
ReflowCounter * LookUp(const char * aName);
void PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
FILE * GetOutFile() { return mFD; }
PLHashTable * GetIndiFrameHT() { return mIndiFrameCounts; }
void SetPresContext(nsPresContext * aPresContext) { mPresContext = aPresContext; } // weak reference
void SetPresShell(nsIPresShell* aPresShell) { mPresShell= aPresShell; } // weak reference
void SetDumpFrameCounts(PRBool aVal) { mDumpFrameCounts = aVal; }
void SetDumpFrameByFrameCounts(PRBool aVal) { mDumpFrameByFrameCounts = aVal; }
void SetPaintFrameCounts(PRBool aVal) { mPaintFrameByFrameCounts = aVal; }
PRBool IsPaintingFrameCounts() { return mPaintFrameByFrameCounts; }
protected:
void DisplayTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle);
void DisplayHTMLTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle);
static PRIntn RemoveItems(PLHashEntry *he, PRIntn i, void *arg);
static PRIntn RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg);
void CleanUp();
// stdout Output Methods
static PRIntn DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg);
static PRIntn DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandTotals();
void DoIndiTotalsTree();
// HTML Output Methods
static PRIntn DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandHTMLTotals();
// Zero Out the Totals
static PRIntn DoClearTotals(PLHashEntry *he, PRIntn i, void *arg);
// Displays the Diff Totals
static PRIntn DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg);
PLHashTable * mCounts;
PLHashTable * mIndiFrameCounts;
FILE * mFD;
PRBool mDumpFrameCounts;
PRBool mDumpFrameByFrameCounts;
PRBool mPaintFrameByFrameCounts;
PRBool mCycledOnce;
// Root Frame for Individual Tracking
nsPresContext * mPresContext;
nsIPresShell* mPresShell;
// ReflowCountMgr gReflowCountMgr;
};
#endif
//========================================================================
// comment out to hide caret
#define SHOW_CARET
// The upper bound on the amount of time to spend reflowing, in
// microseconds. When this bound is exceeded and reflow commands are
// still queued up, a reflow event is posted. The idea is for reflow
// to not hog the processor beyond the time specifed in
// gMaxRCProcessingTime. This data member is initialized from the
// layout.reflow.timeslice pref.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
// Largest chunk size we recycle
static const size_t gMaxRecycledSize = 400;
#define MARK_INCREMENT 50
#define BLOCK_INCREMENT 4044 /* a bit under 4096, for malloc overhead */
/**A block of memory that the stack will
* chop up and hand out
*/
struct StackBlock {
// a block of memory. Note that this must be first so that it will
// be aligned.
char mBlock[BLOCK_INCREMENT];
// another block of memory that would only be created
// if our stack overflowed. Yes we have the ability
// to grow on a stack overflow
StackBlock* mNext;
StackBlock() : mNext(nsnull) { }
~StackBlock() { }
};
/* we hold an array of marks. A push pushes a mark on the stack
* a pop pops it off.
*/
struct StackMark {
// the block of memory we are currently handing out chunks of
StackBlock* mBlock;
// our current position in the memory
size_t mPos;
};
/* A stack arena allows a stack based interface to a block of memory.
* It should be used when you need to allocate some temporary memory that
* you will immediately return.
*/
class StackArena {
public:
StackArena();
~StackArena();
nsresult Init() { return mBlocks ? NS_OK : NS_ERROR_OUT_OF_MEMORY; }
// Memory management functions
void* Allocate(size_t aSize);
void Push();
void Pop();
private:
// our current position in memory
size_t mPos;
// a list of memory block. Usually there is only one
// but if we overrun our stack size we can get more memory.
StackBlock* mBlocks;
// the current block of memory we are passing our chucks of
StackBlock* mCurBlock;
// our stack of mark where push has been called
StackMark* mMarks;
// the current top of the mark list
PRUint32 mStackTop;
// the size of the mark array
PRUint32 mMarkLength;
};
StackArena::StackArena()
{
mMarkLength = 0;
mMarks = nsnull;
// allocate our stack memory
mBlocks = new StackBlock();
mCurBlock = mBlocks;
mStackTop = 0;
mPos = 0;
}
StackArena::~StackArena()
{
// free up our data
delete[] mMarks;
while(mBlocks)
{
StackBlock* toDelete = mBlocks;
mBlocks = mBlocks->mNext;
delete toDelete;
}
}
void
StackArena::Push()
{
// Resize the mark array if we overrun it. Failure to allocate the
// mark array is not fatal; we just won't free to that mark. This
// allows callers not to worry about error checking.
if (mStackTop >= mMarkLength)
{
PRUint32 newLength = mStackTop + MARK_INCREMENT;
StackMark* newMarks = new StackMark[newLength];
if (newMarks) {
if (mMarkLength)
memcpy(newMarks, mMarks, sizeof(StackMark)*mMarkLength);
// Fill in any marks that we couldn't allocate during a prior call
// to Push().
for (; mMarkLength < mStackTop; ++mMarkLength) {
NS_NOTREACHED("should only hit this on out-of-memory");
newMarks[mMarkLength].mBlock = mCurBlock;
newMarks[mMarkLength].mPos = mPos;
}
delete [] mMarks;
mMarks = newMarks;
mMarkLength = newLength;
}
}
// set a mark at the top (if we can)
NS_ASSERTION(mStackTop < mMarkLength, "out of memory");
if (mStackTop < mMarkLength) {
mMarks[mStackTop].mBlock = mCurBlock;
mMarks[mStackTop].mPos = mPos;
}
mStackTop++;
}
void*
StackArena::Allocate(size_t aSize)
{
NS_ASSERTION(mStackTop > 0, "Allocate called without Push");
// make sure we are aligned. Beard said 8 was safer then 4.
// Round size to multiple of 8
aSize = PR_ROUNDUP(aSize, 8);
// if the size makes the stack overflow. Grab another block for the stack
if (mPos + aSize >= BLOCK_INCREMENT)
{
NS_ASSERTION(aSize <= BLOCK_INCREMENT,"Requested memory is greater that our block size!!");
if (mCurBlock->mNext == nsnull)
mCurBlock->mNext = new StackBlock();
mCurBlock = mCurBlock->mNext;
mPos = 0;
}
// return the chunk they need.
void *result = mCurBlock->mBlock + mPos;
mPos += aSize;
return result;
}
void
StackArena::Pop()
{
// pop off the mark
NS_ASSERTION(mStackTop > 0, "unmatched pop");
mStackTop--;
if (mStackTop >= mMarkLength) {
// We couldn't allocate the marks array at the time of the push, so
// we don't know where we're freeing to.
NS_NOTREACHED("out of memory");
if (mStackTop == 0) {
// But we do know if we've completely pushed the stack.
mCurBlock = mBlocks;
mPos = 0;
}
return;
}
#ifdef DEBUG
// Mark the "freed" memory with 0xdd to help with debugging of memory
// allocation problems.
{
StackBlock *block = mMarks[mStackTop].mBlock, *block_end = mCurBlock;
size_t pos = mMarks[mStackTop].mPos;
for (; block != block_end; block = block->mNext, pos = 0) {
memset(block->mBlock + pos, 0xdd, sizeof(block->mBlock) - pos);
}
memset(block->mBlock + pos, 0xdd, mPos - pos);
}
#endif
mCurBlock = mMarks[mStackTop].mBlock;
mPos = mMarks[mStackTop].mPos;
}
// Uncomment this to disable the frame arena.
//#define DEBUG_TRACEMALLOC_FRAMEARENA 1
// Memory is allocated 4-byte aligned. We have recyclers for chunks up to
// 200 bytes
class FrameArena {
public:
FrameArena(PRUint32 aArenaSize = 4096);
~FrameArena();
// Memory management functions
NS_HIDDEN_(void*) AllocateFrame(size_t aSize);
NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aPtr);
private:
#ifdef DEBUG
// Number of frames in the pool
PRUint32 mFrameCount;
#endif
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Underlying arena pool
PLArenaPool mPool;
// The recycler array is sparse with the indices being multiples of 4,
// i.e., 0, 4, 8, 12, 16, 20, ...
void* mRecyclers[gMaxRecycledSize >> 2];
#endif
};
FrameArena::FrameArena(PRUint32 aArenaSize)
#ifdef DEBUG
: mFrameCount(0)
#endif
{
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Initialize the arena pool
PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize);
// Zero out the recyclers array
memset(mRecyclers, 0, sizeof(mRecyclers));
#endif
}
FrameArena::~FrameArena()
{
NS_ASSERTION(mFrameCount == 0,
"Some objects allocated with AllocateFrame were not freed");
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Free the arena in the pool and finish using it
PL_FinishArenaPool(&mPool);
#endif
}
void*
FrameArena::AllocateFrame(size_t aSize)
{
void* result = nsnull;
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
result = PR_Malloc(aSize);
#else
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// Check recyclers first
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
result = mRecyclers[index];
if (result) {
// Need to move to the next object
void* next = *((void**)result);
mRecyclers[index] = next;
}
}
if (!result) {
// Allocate a new chunk from the arena
PL_ARENA_ALLOCATE(result, &mPool, aSize);
}
#endif
#ifdef DEBUG
if (result != nsnull)
++mFrameCount;
#endif
return result;
}
void
FrameArena::FreeFrame(size_t aSize, void* aPtr)
{
#ifdef DEBUG
--mFrameCount;
// Mark the memory with 0xdd in DEBUG builds so that there will be
// problems if someone tries to access memory that they've freed.
memset(aPtr, 0xdd, aSize);
#endif
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
PR_Free(aPtr);
#else
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// See if it's a size that we recycle
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
void* currentTop = mRecyclers[index];
mRecyclers[index] = aPtr;
*((void**)aPtr) = currentTop;
}
#ifdef DEBUG_dbaron
else {
fprintf(stderr,
"WARNING: FrameArena::FreeFrame leaking chunk of %d bytes.\n",
aSize);
}
#endif
#endif
}
struct nsCallbackEventRequest
{
nsIReflowCallback* callback;
nsCallbackEventRequest* next;
};
// ----------------------------------------------------------------------------
class nsPresShellEventCB;
class nsAutoCauseReflowNotifier;
class PresShell : public nsIPresShell, public nsIViewObserver,
public nsStubDocumentObserver,
public nsISelectionController, public nsIObserver,
public nsSupportsWeakReference
{
public:
PresShell();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports
NS_DECL_ISUPPORTS
// nsIPresShell
NS_IMETHOD Init(nsIDocument* aDocument,
nsPresContext* aPresContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsCompatibility aCompatMode);
NS_IMETHOD Destroy();
virtual NS_HIDDEN_(void*) AllocateFrame(size_t aSize);
virtual NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aFreeChunk);
// Dynamic stack memory allocation
virtual NS_HIDDEN_(void) PushStackMemory();
virtual NS_HIDDEN_(void) PopStackMemory();
virtual NS_HIDDEN_(void*) AllocateStackMemory(size_t aSize);
NS_IMETHOD SetPreferenceStyleRules(PRBool aForceReflow);
NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection);
virtual nsISelection* GetCurrentSelection(SelectionType aType);
NS_IMETHOD SetDisplaySelection(PRInt16 aToggle);
NS_IMETHOD GetDisplaySelection(PRInt16 *aToggle);
NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous);
NS_IMETHOD RepaintSelection(SelectionType aType);
NS_IMETHOD BeginObservingDocument();
NS_IMETHOD EndObservingDocument();
NS_IMETHOD GetDidInitialReflow(PRBool *aDidInitialReflow);
NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD StyleChangeReflow();
NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const;
virtual NS_HIDDEN_(nsIFrame*) GetPrimaryFrameFor(nsIContent* aContent) const;
virtual NS_HIDDEN_(nsIFrame*) GetRealPrimaryFrameFor(nsIContent* aContent) const;
NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aPlaceholderFrame) const;
NS_IMETHOD FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty,
nsFrameState aBitToAdd);
NS_IMETHOD_(void) FrameNeedsToContinueReflow(nsIFrame *aFrame);
NS_IMETHOD CancelAllPendingReflows();
NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush);
NS_IMETHOD FlushPendingNotifications(mozFlushType aType);
/**
* Recreates the frames for a node
*/
NS_IMETHOD RecreateFramesFor(nsIContent* aContent);
/**
* Post a callback that should be handled after reflow has finished.
*/
NS_IMETHOD PostReflowCallback(nsIReflowCallback* aCallback);
NS_IMETHOD CancelReflowCallback(nsIReflowCallback* aCallback);
NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aContext);
NS_IMETHOD GoToAnchor(const nsAString& aAnchorName, PRBool aScroll);
NS_IMETHOD ScrollToAnchor();
NS_IMETHOD ScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent);
NS_IMETHOD SetIgnoreFrameDestruction(PRBool aIgnore);
NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame);
NS_IMETHOD DoCopy();
NS_IMETHOD GetSelectionForCopy(nsISelection** outSelection);
NS_IMETHOD GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString);
NS_IMETHOD DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& outValue);
NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, PRBool aLeavingPage);
NS_IMETHOD IsPaintingSuppressed(PRBool* aResult);
NS_IMETHOD UnsuppressPainting();
NS_IMETHOD DisableThemeSupport();
virtual PRBool IsThemeSupportEnabled();
virtual nsresult GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets);
virtual nsresult SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets);
virtual nsresult AddOverrideStyleSheet(nsIStyleSheet *aSheet);
virtual nsresult RemoveOverrideStyleSheet(nsIStyleSheet *aSheet);
NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame,
nsIContent* aContent,
nsEventStatus* aStatus);
NS_IMETHOD GetEventTargetFrame(nsIFrame** aFrame);
NS_IMETHOD GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent);
NS_IMETHOD IsReflowLocked(PRBool* aIsLocked);
virtual nsresult ReconstructFrames(void);
virtual void Freeze();
virtual void Thaw();
virtual void FireOrClearDelayedEvents(PRBool aFireEvents);
virtual nsIFrame* GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt);
NS_IMETHOD RenderDocument(const nsRect& aRect, PRUint32 aFlags,
nscolor aBackgroundColor,
gfxContext* aThebesContext);
virtual already_AddRefed<gfxASurface> RenderNode(nsIDOMNode* aNode,
nsIRegion* aRegion,
nsIntPoint& aPoint,
nsIntRect* aScreenRect);
virtual already_AddRefed<gfxASurface> RenderSelection(nsISelection* aSelection,
nsIntPoint& aPoint,
nsIntRect* aScreenRect);
//nsIViewObserver interface
NS_IMETHOD Paint(nsIView *aView,
nsIRenderingContext* aRenderingContext,
const nsRegion& aDirtyRegion);
NS_IMETHOD PaintDefaultBackground(nsIView *aView,
nsIRenderingContext* aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD ComputeRepaintRegionForCopy(nsIView* aRootView,
nsIView* aMovingView,
nsPoint aDelta,
const nsRect& aCopyRect,
nsRegion* aRepaintRegion);
NS_IMETHOD HandleEvent(nsIView* aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsEvent* aEvent,
nsEventStatus* aStatus);
NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsIDOMEvent* aEvent,
nsEventStatus* aStatus);
NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight);
NS_IMETHOD_(PRBool) IsVisible();
NS_IMETHOD_(void) WillPaint();
NS_IMETHOD_(void) InvalidateFrameForView(nsIView *view);
NS_IMETHOD_(void) DispatchSynthMouseMove(nsGUIEvent *aEvent,
PRBool aFlushOnHoverChange);
// caret handling
NS_IMETHOD GetCaret(nsCaret **aOutCaret);
NS_IMETHOD_(void) MaybeInvalidateCaretPosition();
NS_IMETHOD SetCaretEnabled(PRBool aInEnable);
NS_IMETHOD SetCaretReadOnly(PRBool aReadOnly);
NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled);
NS_IMETHOD SetCaretVisibilityDuringSelection(PRBool aVisibility);
NS_IMETHOD GetCaretVisible(PRBool *_retval);
virtual void SetCaret(nsCaret *aNewCaret);
virtual void RestoreCaret();
NS_IMETHOD SetSelectionFlags(PRInt16 aInEnable);
NS_IMETHOD GetSelectionFlags(PRInt16 *aOutEnable);
// nsISelectionController
NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD CharacterExtendForDelete();
NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD WordExtendForDelete(PRBool aForward);
NS_IMETHOD LineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD IntraLineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD PageMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD ScrollPage(PRBool aForward);
NS_IMETHOD ScrollLine(PRBool aForward);
NS_IMETHOD ScrollHorizontal(PRBool aLeft);
NS_IMETHOD CompleteScroll(PRBool aForward);
NS_IMETHOD CompleteMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD SelectAll();
NS_IMETHOD CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval);
// nsIDocumentObserver
virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);
virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);
virtual void BeginLoad(nsIDocument* aDocument);
virtual void EndLoad(nsIDocument* aDocument);
virtual void ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask);
virtual void StyleSheetAdded(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet);
virtual void StyleSheetRemoved(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet);
virtual void StyleSheetApplicableStateChanged(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aApplicable);
virtual void StyleRuleChanged(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule);
virtual void StyleRuleAdded(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
virtual void StyleRuleRemoved(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
// nsIMutationObserver
NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
NS_DECL_NSIOBSERVER
#ifdef MOZ_REFLOW_PERF
NS_IMETHOD DumpReflows();
NS_IMETHOD CountReflows(const char * aName, nsIFrame * aFrame);
NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
NS_IMETHOD SetPaintFrameCount(PRBool aOn);
virtual PRBool IsPaintingFrameCounts();
#endif
#ifdef DEBUG
virtual void ListStyleContexts(nsIFrame *aRootFrame, FILE *out,
PRInt32 aIndent = 0);
virtual void ListStyleSheets(FILE *out, PRInt32 aIndent = 0);
virtual void VerifyStyleTree();
#endif
#ifdef PR_LOGGING
static PRLogModuleInfo* gLog;
#endif
NS_IMETHOD DisableNonTestMouseEvents(PRBool aDisable);
virtual void UpdateCanvasBackground();
virtual nsresult AddCanvasBackgroundColorItem(nsDisplayListBuilder& aBuilder,
nsDisplayList& aList,
nsIFrame* aFrame,
nsRect* aBounds,
nscolor aBackstopColor);
protected:
virtual ~PresShell();
void HandlePostedReflowCallbacks(PRBool aInterruptible);
void CancelPostedReflowCallbacks();
void UnsuppressAndInvalidate();
void WillCauseReflow() {
nsContentUtils::AddScriptBlocker();
++mChangeNestCount;
}
nsresult DidCauseReflow();
friend class nsAutoCauseReflowNotifier;
void WillDoReflow();
void DidDoReflow(PRBool aInterruptible);
// ProcessReflowCommands returns whether we processed all our dirty roots
// without interruptions.
PRBool ProcessReflowCommands(PRBool aInterruptible);
void ClearReflowEventStatus();
// PostReflowEvent checks if posting a reflow is needed, then checks if the
// last reflow was interupted. In the interupted case DoPostReflowEvent is
// called off a timer, otherwise it is called directly.
void PostReflowEvent();
// Actually posts a reflow event to the current thread.
void DoPostReflowEvent();
// DoReflow returns whether the reflow finished without interruption
PRBool DoReflow(nsIFrame* aFrame, PRBool aInterruptible);
#ifdef DEBUG
void DoVerifyReflow();
void VerifyHasDirtyRootAncestor(nsIFrame* aFrame);
#endif
// Helper for ScrollContentIntoView
void DoScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent);
friend class nsPresShellEventCB;
class ReflowEvent;
friend class ReflowEvent;
class ReflowEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
ReflowEvent(PresShell *aPresShell) : mPresShell(aPresShell) {
NS_ASSERTION(aPresShell, "Null parameters!");
}
void Revoke() { mPresShell = nsnull; }
private:
PresShell *mPresShell;
};
// Utility to find which view to scroll.
nsIScrollableView* GetViewToScroll(nsLayoutUtils::Direction aDirection);
PRBool mCaretEnabled;
#ifdef NS_DEBUG
nsresult CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult);
PRBool VerifyIncrementalReflow();
PRBool mInVerifyReflow;
void ShowEventTargetDebug();
#endif
/**
* methods that manage rules that are used to implement the associated preferences
* - initially created for bugs 31816, 20760, 22963
*/
nsresult ClearPreferenceStyleRules(void);
nsresult CreatePreferenceStyleSheet(void);
nsresult SetPrefLinkRules(void);
nsresult SetPrefFocusRules(void);
nsresult SetPrefNoScriptRule();
nsresult SetPrefNoFramesRule(void);
// methods for painting a range to an offscreen buffer
// given a display list, clip the items within the list to
// the range
nsRect ClipListToRange(nsDisplayListBuilder *aBuilder,
nsDisplayList* aList,
nsIRange* aRange);
// create a RangePaintInfo for the range aRange containing the
// display list needed to paint the range to a surface
RangePaintInfo* CreateRangePaintInfo(nsIDOMRange* aRange,
nsRect& aSurfaceRect);
/*
* Paint the items to a new surface and return it.
*
* aSelection - selection being painted, if any
* aRegion - clip region, if any
* aArea - area that the surface occupies, relative to the root frame
* aPoint - reference point, typically the mouse position
* aScreenRect - [out] set to the area of the screen the painted area should
* be displayed at
*/
already_AddRefed<gfxASurface>
PaintRangePaintInfo(nsTArray<nsAutoPtr<RangePaintInfo> >* aItems,
nsISelection* aSelection,
nsIRegion* aRegion,
nsRect aArea,
nsIntPoint& aPoint,
nsIntRect* aScreenRect);
/**
* Methods to handle changes to user and UA sheet lists that we get
* notified about.
*/
void AddUserSheet(nsISupports* aSheet);
void AddAgentSheet(nsISupports* aSheet);
void RemoveSheet(nsStyleSet::sheetType aType, nsISupports* aSheet);
// Hide a view if it is a popup
void HideViewIfPopup(nsIView* aView);
// Utility method to restore the root scrollframe state
void RestoreRootScrollPosition();
nsCOMPtr<nsICSSStyleSheet> mPrefStyleSheet; // mStyleSet owns it but we
// maintain a ref, may be null
#ifdef DEBUG
PRUint32 mUpdateCount;
#endif
// reflow roots that need to be reflowed, as both a queue and a hashtable
nsTArray<nsIFrame*> mDirtyRoots;
PRPackedBool mDocumentLoading;
PRPackedBool mIsReflowing;
PRPackedBool mIgnoreFrameDestruction;
PRPackedBool mHaveShutDown;
// This is used to protect ourselves from triggering reflow while in the
// middle of frame construction and the like... it really shouldn't be
// needed, one hopes, but it is for now.
PRUint32 mChangeNestCount;
nsIFrame* mCurrentEventFrame;
nsCOMPtr<nsIContent> mCurrentEventContent;
nsTArray<nsIFrame*> mCurrentEventFrameStack;
nsCOMArray<nsIContent> mCurrentEventContentStack;
nsCOMPtr<nsIContent> mLastAnchorScrolledTo;
nscoord mLastAnchorScrollPositionY;
nsRefPtr<nsCaret> mCaret;
nsRefPtr<nsCaret> mOriginalCaret;
PRInt16 mSelectionFlags;
FrameArena mFrameArena;
StackArena mStackArena;
nsCOMPtr<nsIDragService> mDragService;
nsRevocableEventPtr<ReflowEvent> mReflowEvent;
#ifdef DEBUG
// The reflow root under which we're currently reflowing. Null when
// not in reflow.
nsIFrame* mCurrentReflowRoot;
#endif
// Set of frames that we should mark with NS_FRAME_HAS_DIRTY_CHILDREN after
// we finish reflowing mCurrentReflowRoot.
nsTHashtable< nsPtrHashKey<nsIFrame> > mFramesToDirty;
// Information needed to properly handle scrolling content into view if the
// pre-scroll reflow flush can be interrupted. mContentToScrollTo is
// non-null between the initial scroll attempt and the first time we finish
// processing all our dirty roots. mContentScrollVPosition and
// mContentScrollHPosition are only used when it's non-null.
nsCOMPtr<nsIContent> mContentToScrollTo;
PRIntn mContentScrollVPosition;
PRIntn mContentScrollHPosition;
class nsDelayedEvent
{
public:
virtual ~nsDelayedEvent() {};
virtual void Dispatch(PresShell* aShell) {}
// This is needed only by nsDelayedFocusBlur.
virtual PRBool Equals(nsPIDOMEventTarget* aTarget, PRUint32 aEventType)
{
return PR_FALSE;
}
};
class nsDelayedInputEvent : public nsDelayedEvent
{
public:
virtual void Dispatch(PresShell* aShell)
{
if (mEvent && mEvent->widget) {
nsCOMPtr<nsIWidget> w = mEvent->widget;
nsEventStatus status;
w->DispatchEvent(mEvent, status);
}
}
protected:
void Init(nsInputEvent* aEvent)
{
mEvent->time = aEvent->time;
mEvent->refPoint = aEvent->refPoint;
mEvent->isShift = aEvent->isShift;
mEvent->isControl = aEvent->isControl;
mEvent->isAlt = aEvent->isAlt;
mEvent->isMeta = aEvent->isMeta;
}
nsDelayedInputEvent()
: nsDelayedEvent(), mEvent(nsnull) {}
nsInputEvent* mEvent;
};
class nsDelayedMouseEvent : public nsDelayedInputEvent
{
public:
nsDelayedMouseEvent(nsMouseEvent* aEvent) : nsDelayedInputEvent()
{
mEvent = new nsMouseEvent(NS_IS_TRUSTED_EVENT(aEvent),
aEvent->message,
aEvent->widget,
aEvent->reason,
aEvent->context);
if (mEvent) {
Init(aEvent);
static_cast<nsMouseEvent*>(mEvent)->clickCount = aEvent->clickCount;
}
}
virtual ~nsDelayedMouseEvent()
{
delete static_cast<nsMouseEvent*>(mEvent);
}
};
class nsDelayedKeyEvent : public nsDelayedInputEvent
{
public:
nsDelayedKeyEvent(nsKeyEvent* aEvent) : nsDelayedInputEvent()
{
mEvent = new nsKeyEvent(NS_IS_TRUSTED_EVENT(aEvent),
aEvent->message,
aEvent->widget);
if (mEvent) {
Init(aEvent);
static_cast<nsKeyEvent*>(mEvent)->keyCode = aEvent->keyCode;
static_cast<nsKeyEvent*>(mEvent)->charCode = aEvent->charCode;
static_cast<nsKeyEvent*>(mEvent)->alternativeCharCodes =
aEvent->alternativeCharCodes;
static_cast<nsKeyEvent*>(mEvent)->isChar = aEvent->isChar;
}
}
virtual ~nsDelayedKeyEvent()
{
delete static_cast<nsKeyEvent*>(mEvent);
}
};
PRPackedBool mNoDelayedMouseEvents;
PRPackedBool mNoDelayedKeyEvents;
nsTArray<nsAutoPtr<nsDelayedEvent> > mDelayedEvents;
nsCallbackEventRequest* mFirstCallbackEventRequest;
nsCallbackEventRequest* mLastCallbackEventRequest;
PRPackedBool mSuppressInterruptibleReflows;
PRPackedBool mIsThemeSupportDisabled; // Whether or not form controls should use nsITheme in this shell.
PRPackedBool mIsDocumentGone; // We've been disconnected from the document.
PRPackedBool mPaintingSuppressed; // For all documents we initially lock down painting.
// We will refuse to paint the document until either
// (a) our timer fires or (b) all frames are constructed.
PRPackedBool mShouldUnsuppressPainting; // Indicates that it is safe to unlock painting once all pending
// reflows have been processed.
nsCOMPtr<nsITimer> mPaintSuppressionTimer; // This timer controls painting suppression. Until it fires
// or all frames are constructed, we won't paint anything but
// our <body> background and scrollbars.
#define PAINTLOCK_EVENT_DELAY 250 // 250ms. This is actually
// pref-controlled, but we use this
// value if we fail to get the pref
// for any reason.
static void sPaintSuppressionCallback(nsITimer* aTimer, void* aPresShell); // A callback for the timer.
// On Win32 after interupting a reflow we need to post the resume reflow
// event off a timer to avoid event starvation because posted messages are
// processed before other messages when the modal moving/sizing loop is
// running, see bug 491700 for details.
nsCOMPtr<nsITimer> mReflowContinueTimer;
static void sReflowContinueCallback(nsITimer* aTimer, void* aPresShell);
PRBool PostReflowEventOffTimer();
MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow
MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation
#ifdef MOZ_REFLOW_PERF
ReflowCountMgr * mReflowCountMgr;
#endif
static PRBool sDisableNonTestMouseEvents;
nsCOMPtr<nsIDocumentObserver> mDocumentObserverForNonDynamicContext;
// false if a check should be done for key/ime events that should be
// retargeted to the currently focused presshell
static PRBool sDontRetargetEvents;
private:
PRBool InZombieDocument(nsIContent *aContent);
nsresult RetargetEventToParent(nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
//helper funcs for event handling
protected:
//protected because nsPresShellEventCB needs this.
nsIFrame* GetCurrentEventFrame();
private:
void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent);
void PopCurrentEventInfo();
nsresult HandleEventInternal(nsEvent* aEvent, nsIView* aView,
nsEventStatus *aStatus);
nsresult HandlePositionedEvent(nsIView* aView,
nsIFrame* aTargetFrame,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
/*
* This and the next two helper methods are used to target and position the
* context menu when the keyboard shortcut is used to open it.
*
* If another menu is open, the context menu is opened relative to the
* active menuitem within the menu, or the menu itself if no item is active.
* Otherwise, if the caret is visible, the menu is opened near the caret.
* Otherwise, if a selectable list such as a listbox is focused, the
* current item within the menu is opened relative to this item.
* Otherwise, the context menu is opened at the topleft corner of the
* view.
*
* Returns true if the context menu event should fire and false if it should
* not.
*/
PRBool AdjustContextMenuKeyEvent(nsMouseEvent* aEvent);
//
PRBool PrepareToUseCaretPosition(nsIWidget* aEventWidget, nsIntPoint& aTargetPt);
// Get the selected item and coordinates in device pixels relative to root
// document's root view for element, first ensuring the element is onscreen
void GetCurrentItemAndPositionForElement(nsIDOMElement *aCurrentEl,
nsIContent **aTargetToUse,
nsIntPoint& aTargetPt);
void FireResizeEvent();
nsRevocableEventPtr<nsRunnableMethod<PresShell> > mResizeEvent;
typedef void (*nsPluginEnumCallback)(PresShell*, nsIContent*);
void EnumeratePlugins(nsIDOMDocument *aDocument,
const nsString &aPluginTag,
nsPluginEnumCallback aCallback);
private:
/*
* Computes the backstop color for the view: transparent if in a transparent
* widget, otherwise the PresContext default background color. This color is
* only visible if the contents of the view as a whole are translucent.
*/
nscolor ComputeBackstopColor(nsIView* aView);
};
class nsAutoCauseReflowNotifier
{
public:
nsAutoCauseReflowNotifier(PresShell* aShell)
: mShell(aShell)
{
mShell->WillCauseReflow();
}
~nsAutoCauseReflowNotifier()
{
// This check should not be needed. Currently the only place that seem
// to need it is the code that deals with bug 337586.
if (!mShell->mHaveShutDown) {
mShell->DidCauseReflow();
}
else {
nsContentUtils::RemoveScriptBlocker();
}
}
PresShell* mShell;
};
class NS_STACK_CLASS nsPresShellEventCB : public nsDispatchingCallback
{
public:
nsPresShellEventCB(PresShell* aPresShell) : mPresShell(aPresShell) {}
virtual void HandleEvent(nsEventChainPostVisitor& aVisitor)
{
if (aVisitor.mPresContext && aVisitor.mEvent->eventStructType != NS_EVENT) {
nsIFrame* frame = mPresShell->GetCurrentEventFrame();
if (frame) {
frame->HandleEvent(aVisitor.mPresContext,
(nsGUIEvent*) aVisitor.mEvent,
&aVisitor.mEventStatus);
}
}
}
nsRefPtr<PresShell> mPresShell;
};
class nsDocumentObserverForNonDynamicPresContext : public nsStubDocumentObserver
{
public:
nsDocumentObserverForNonDynamicPresContext(PresShell* aBaseObserver)
: mBaseObserver(aBaseObserver)
{
NS_ASSERTION(aBaseObserver, "Null document observer!");
}
NS_DECL_ISUPPORTS
virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType)
{
mBaseObserver->BeginUpdate(aDocument, aUpdateType);
}
virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType)
{
mBaseObserver->EndUpdate(aDocument, aUpdateType);
}
virtual void BeginLoad(nsIDocument* aDocument)
{
mBaseObserver->BeginLoad(aDocument);
}
virtual void EndLoad(nsIDocument* aDocument)
{
mBaseObserver->EndLoad(aDocument);
}
virtual void ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask)
{
if ((!aContent1 || AllowMutation(aContent1)) &&
(!aContent2 || AllowMutation(aContent2))) {
mBaseObserver->ContentStatesChanged(aDocument, aContent1, aContent2,
aStateMask);
}
}
// nsIMutationObserver
virtual void CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
if (AllowMutation(aContent)) {
mBaseObserver->CharacterDataChanged(aDocument, aContent, aInfo);
}
}
virtual void AttributeChanged(nsIDocument* aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
PRUint32 aStateMask)
{
if (AllowMutation(aContent)) {
mBaseObserver->AttributeChanged(aDocument, aContent, aNameSpaceID,
aAttribute, aModType, aStateMask);
}
}
virtual void ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
if (AllowMutation(aContainer)) {
mBaseObserver->ContentAppended(aDocument, aContainer,
aNewIndexInContainer);
}
}
virtual void ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
if (AllowMutation(aContainer)) {
mBaseObserver->ContentInserted(aDocument, aContainer, aChild,
aIndexInContainer);
}
}
virtual void ContentRemoved(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
if (AllowMutation(aContainer)) {
mBaseObserver->ContentRemoved(aDocument, aContainer, aChild,
aIndexInContainer);
}
}
PRBool AllowMutation(nsIContent* aContent) {
if(aContent && aContent->IsInDoc()) {
if (mBaseObserver->ObservesNativeAnonMutationsForPrint() &&
aContent->IsInNativeAnonymousSubtree()) {
return PR_TRUE;
}
// Changes to scrollbar are always ok.
nsIContent* root = aContent->GetCurrentDoc()->GetRootContent();
while (aContent && aContent->IsInNativeAnonymousSubtree()) {
nsIContent* parent = aContent->GetParent();
if (parent == root && aContent->IsNodeOfType(nsINode::eXUL)) {
nsIAtom* tag = aContent->Tag();
return tag == nsGkAtoms::scrollbar || tag == nsGkAtoms::scrollcorner;
}
aContent = parent;
}
}
return PR_FALSE;
}
protected:
nsRefPtr<PresShell> mBaseObserver;
};
NS_IMPL_ISUPPORTS2(nsDocumentObserverForNonDynamicPresContext,
nsIDocumentObserver,
nsIMutationObserver)
PRBool PresShell::sDisableNonTestMouseEvents = PR_FALSE;
PRBool PresShell::sDontRetargetEvents = PR_FALSE;
#ifdef PR_LOGGING
PRLogModuleInfo* PresShell::gLog;
#endif
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsPresContext* aPresContext, nsFrameManager* aFrameManager)
{
if (nsIFrameDebug::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame = aFrameManager->GetRootFrame();
aFrameManager->DebugVerifyStyleTree(rootFrame);
}
}
#define VERIFY_STYLE_TREE ::VerifyStyleTree(mPresContext, FrameManager())
#else
#define VERIFY_STYLE_TREE
#endif
static PRBool gVerifyReflowEnabled;
PRBool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_VERIFY_REFLOW_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* comma = PL_strchr(flags, ',');
if (comma)
*comma = '\0';
PRBool found = PR_FALSE;
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
if (PL_strcasecmp(flag->name, flags) == 0) {
gVerifyReflowFlags |= flag->bit;
found = PR_TRUE;
break;
}
++flag;
}
if (! found)
error = PR_TRUE;
if (! comma)
break;
*comma = ',';
flags = comma + 1;
}
if (error)
ShowVerifyReflowFlags();
}
if (VERIFY_REFLOW_ON & gVerifyReflowFlags) {
gVerifyReflowEnabled = PR_TRUE;
printf("Note: verifyreflow is enabled");
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf(" (noisy)");
}
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf(" (all)");
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf(" (show reflow commands)");
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf(" (noisy reflow commands)");
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf(" (REALLY noisy reflow commands)");
}
}
printf("\n");
}
}
#endif
return gVerifyReflowEnabled;
}
void
nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled)
{
gVerifyReflowEnabled = aEnabled;
}
PRInt32
nsIPresShell::GetVerifyReflowFlags()
{
#ifdef NS_DEBUG
return gVerifyReflowFlags;
#else
return 0;
#endif
}
void
nsIPresShell::AddWeakFrame(nsWeakFrame* aWeakFrame)
{
if (aWeakFrame->GetFrame()) {
aWeakFrame->GetFrame()->AddStateBits(NS_FRAME_EXTERNAL_REFERENCE);
}
aWeakFrame->SetPreviousWeakFrame(mWeakFrames);
mWeakFrames = aWeakFrame;
}
void
nsIPresShell::RemoveWeakFrame(nsWeakFrame* aWeakFrame)
{
if (mWeakFrames == aWeakFrame) {
mWeakFrames = aWeakFrame->GetPreviousWeakFrame();
return;
}
nsWeakFrame* nextWeak = mWeakFrames;
while (nextWeak && nextWeak->GetPreviousWeakFrame() != aWeakFrame) {
nextWeak = nextWeak->GetPreviousWeakFrame();
}
if (nextWeak) {
nextWeak->SetPreviousWeakFrame(aWeakFrame->GetPreviousWeakFrame());
}
}
already_AddRefed<nsFrameSelection>
nsIPresShell::FrameSelection()
{
NS_IF_ADDREF(mSelection);
return mSelection;
}
//----------------------------------------------------------------------
nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
PresShell* it = new PresShell();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIPresShell),
(void **) aInstancePtrResult);
}
PresShell::PresShell()
{
mSelection = nsnull;
#ifdef MOZ_REFLOW_PERF
mReflowCountMgr = new ReflowCountMgr();
mReflowCountMgr->SetPresContext(mPresContext);
mReflowCountMgr->SetPresShell(this);
#endif
#ifdef PR_LOGGING
if (! gLog)
gLog = PR_NewLogModule("PresShell");
#endif
mSelectionFlags = nsISelectionDisplay::DISPLAY_TEXT | nsISelectionDisplay::DISPLAY_IMAGES;
mIsThemeSupportDisabled = PR_FALSE;
new (this) nsFrameManager();
}
NS_IMPL_ISUPPORTS8(PresShell, nsIPresShell, nsIDocumentObserver,
nsIViewObserver, nsISelectionController,
nsISelectionDisplay, nsIObserver, nsISupportsWeakReference,
nsIMutationObserver)
PresShell::~PresShell()
{
if (!mHaveShutDown) {
NS_NOTREACHED("Someone did not call nsIPresShell::destroy");
Destroy();
}
NS_ASSERTION(mCurrentEventContentStack.Count() == 0,
"Huh, event content left on the stack in pres shell dtor!");
NS_ASSERTION(mFirstCallbackEventRequest == nsnull &&
mLastCallbackEventRequest == nsnull,
"post-reflow queues not empty. This means we're leaking");
delete mStyleSet;
delete mFrameConstructor;
mCurrentEventContent = nsnull;
NS_IF_RELEASE(mPresContext);
NS_IF_RELEASE(mDocument);
NS_IF_RELEASE(mSelection);
}
/**
* Initialize the presentation shell. Create view manager and style
* manager.
*/
NS_IMETHODIMP
PresShell::Init(nsIDocument* aDocument,
nsPresContext* aPresContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsCompatibility aCompatMode)
{
NS_PRECONDITION(nsnull != aDocument, "null ptr");
NS_PRECONDITION(nsnull != aPresContext, "null ptr");
NS_PRECONDITION(nsnull != aViewManager, "null ptr");
nsresult result;
if ((nsnull == aDocument) || (nsnull == aPresContext) ||
(nsnull == aViewManager)) {
return NS_ERROR_NULL_POINTER;
}
if (mDocument) {
NS_WARNING("PresShell double init'ed");
return NS_ERROR_ALREADY_INITIALIZED;
}
result = mStackArena.Init();
NS_ENSURE_SUCCESS(result, result);
if (!mFramesToDirty.Init()) {
return NS_ERROR_OUT_OF_MEMORY;
}
mDocument = aDocument;
NS_ADDREF(mDocument);
mViewManager = aViewManager;
// Create our frame constructor.
mFrameConstructor = new nsCSSFrameConstructor(mDocument, this);
NS_ENSURE_TRUE(mFrameConstructor, NS_ERROR_OUT_OF_MEMORY);
// The document viewer owns both view manager and pres shell.
mViewManager->SetViewObserver(this);
// Bind the context to the presentation shell.
mPresContext = aPresContext;
NS_ADDREF(mPresContext);
aPresContext->SetShell(this);
// Now we can initialize the style set.
result = aStyleSet->Init(aPresContext);
NS_ENSURE_SUCCESS(result, result);
// From this point on, any time we return an error we need to make
// sure to null out mStyleSet first, since an error return from this
// method will cause the caller to delete the style set, so we don't
// want to delete it in our destructor.
mStyleSet = aStyleSet;
// Notify our prescontext that it now has a compatibility mode. Note that
// this MUST happen after we set up our style set but before we create any
// frames.
mPresContext->CompatibilityModeChanged();
// setup the preference style rules (no forced reflow), and do it
// before creating any frames.
SetPreferenceStyleRules(PR_FALSE);
result = CallCreateInstance(kFrameSelectionCID, &mSelection);
if (NS_FAILED(result)) {
mStyleSet = nsnull;
return result;
}
// Create and initialize the frame manager
result = FrameManager()->Init(this, mStyleSet);
if (NS_FAILED(result)) {
NS_WARNING("Frame manager initialization failed");
mStyleSet = nsnull;
return result;
}
mSelection->Init(this, nsnull);
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
// make the caret
nsresult err = NS_NewCaret(getter_AddRefs(mCaret));
if (NS_SUCCEEDED(err))
{
mCaret->Init(this);
mOriginalCaret = mCaret;
}
//SetCaretEnabled(PR_TRUE); // make it show in browser windows
#endif
//set up selection to be displayed in document
// Don't enable selection for print media
nsPresContext::nsPresContextType type = aPresContext->Type();
if (type != nsPresContext::eContext_PrintPreview &&
type != nsPresContext::eContext_Print)
SetDisplaySelection(nsISelectionController::SELECTION_DISABLED);
if (gMaxRCProcessingTime == -1) {
gMaxRCProcessingTime =
nsContentUtils::GetIntPref("layout.reflow.timeslice",
NS_MAX_REFLOW_TIME);
}
{
nsCOMPtr<nsIObserverService> os =
do_GetService("@mozilla.org/observer-service;1", &result);
if (os) {
os->AddObserver(this, NS_LINK_VISITED_EVENT_TOPIC, PR_FALSE);
os->AddObserver(this, "agent-sheet-added", PR_FALSE);
os->AddObserver(this, "user-sheet-added", PR_FALSE);
os->AddObserver(this, "agent-sheet-removed", PR_FALSE);
os->AddObserver(this, "user-sheet-removed", PR_FALSE);
#ifdef MOZ_XUL
os->AddObserver(this, "chrome-flush-skin-caches", PR_FALSE);
#endif
#ifdef ACCESSIBILITY
os->AddObserver(this, "a11y-init-or-shutdown", PR_FALSE);
#endif
}
}
// cache the drag service so we can check it during reflows
mDragService = do_GetService("@mozilla.org/widget/dragservice;1");
#ifdef MOZ_REFLOW_PERF
if (mReflowCountMgr) {
PRBool paintFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.showframecounts");
PRBool dumpFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.dumpframecounts");
PRBool dumpFrameByFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.dumpframebyframecounts");
mReflowCountMgr->SetDumpFrameCounts(dumpFrameCounts);
mReflowCountMgr->SetDumpFrameByFrameCounts(dumpFrameByFrameCounts);
mReflowCountMgr->SetPaintFrameCounts(paintFrameCounts);
}
#endif
return NS_OK;
}
NS_IMETHODIMP
PresShell::Destroy()
{
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"destroy called on presshell while scripts not blocked");
#ifdef MOZ_REFLOW_PERF
DumpReflows();
if (mReflowCountMgr) {
delete mReflowCountMgr;
mReflowCountMgr = nsnull;
}
#endif
if (mHaveShutDown)
return NS_OK;
mContentToScrollTo = nsnull;
if (mPresContext) {
// We need to notify the destroying the nsPresContext to ESM for
// suppressing to use from ESM.
mPresContext->EventStateManager()->NotifyDestroyPresContext(mPresContext);
}
{
nsCOMPtr<nsIObserverService> os =
do_GetService("@mozilla.org/observer-service;1");
if (os) {
os->RemoveObserver(this, NS_LINK_VISITED_EVENT_TOPIC);
os->RemoveObserver(this, "agent-sheet-added");
os->RemoveObserver(this, "user-sheet-added");
os->RemoveObserver(this, "agent-sheet-removed");
os->RemoveObserver(this, "user-sheet-removed");
#ifdef MOZ_XUL
os->RemoveObserver(this, "chrome-flush-skin-caches");
#endif
#ifdef ACCESSIBILITY
os->RemoveObserver(this, "a11y-init-or-shutdown");
#endif
}
}
// If our paint suppression timer is still active, kill it.
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
// Same for our reflow continuation timer
if (mReflowContinueTimer) {
mReflowContinueTimer->Cancel();
mReflowContinueTimer = nsnull;
}
if (mCaret) {
mCaret->Terminate();
mCaret = nsnull;
}
if (mSelection) {
mSelection->DisconnectFromPresShell();
}
// release our pref style sheet, if we have one still
ClearPreferenceStyleRules();
mIsDestroying = PR_TRUE;
// We can't release all the event content in
// mCurrentEventContentStack here since there might be code on the
// stack that will release the event content too. Double release
// bad!
// The frames will be torn down, so remove them from the current
// event frame stack (since they'd be dangling references if we'd
// leave them in) and null out the mCurrentEventFrame pointer as
// well.
mCurrentEventFrame = nsnull;
PRInt32 i, count = mCurrentEventFrameStack.Length();
for (i = 0; i < count; i++) {
mCurrentEventFrameStack[i] = nsnull;
}
if (mViewManager) {
// Clear the view manager's weak pointer back to |this| in case it
// was leaked.
mViewManager->SetViewObserver(nsnull);
mViewManager = nsnull;
}
mStyleSet->BeginShutdown(mPresContext);
// This shell must be removed from the document before the frame
// hierarchy is torn down to avoid finding deleted frames through
// this presshell while the frames are being torn down
if (mDocument) {
mDocument->DeleteShell(this);
}
// Revoke any pending reflow event. We need to do this and cancel
// pending reflows before we destroy the frame manager, since
// apparently frame destruction sometimes spins the event queue when
// plug-ins are involved(!).
mReflowEvent.Revoke();
mResizeEvent.Revoke();
CancelAllPendingReflows();
CancelPostedReflowCallbacks();
// Destroy the frame manager. This will destroy the frame hierarchy
mFrameConstructor->WillDestroyFrameTree();
FrameManager()->Destroy();
// Destroy all frame properties (whose destruction was suppressed
// while destroying the frame tree, but which might contain more
// frames within the properties.
if (mPresContext) {
// Clear out the prescontext's property table -- since our frame tree is
// now dead, we shouldn't be looking up any more properties in that table.
// We want to do this before we call SetShell() on the prescontext, so
// property destructors can usefully call GetPresShell() on the
// prescontext.
mPresContext->PropertyTable()->DeleteAllProperties();
}
NS_WARN_IF_FALSE(!mWeakFrames, "Weak frames alive after destroying FrameManager");
while (mWeakFrames) {
mWeakFrames->Clear(this);
}
// Let the style set do its cleanup.
mStyleSet->Shutdown(mPresContext);
if (mPresContext) {
// We hold a reference to the pres context, and it holds a weak link back
// to us. To avoid the pres context having a dangling reference, set its
// pres shell to NULL
mPresContext->SetShell(nsnull);
// Clear the link handler (weak reference) as well
mPresContext->SetLinkHandler(nsnull);
}
mHaveShutDown = PR_TRUE;
return NS_OK;
}
// Dynamic stack memory allocation
/* virtual */ void
PresShell::PushStackMemory()
{
mStackArena.Push();
}
/* virtual */ void
PresShell::PopStackMemory()
{
mStackArena.Pop();
}
/* virtual */ void*
PresShell::AllocateStackMemory(size_t aSize)
{
return mStackArena.Allocate(aSize);
}
void
PresShell::FreeFrame(size_t aSize, void* aPtr)
{
mFrameArena.FreeFrame(aSize, aPtr);
}
void*
PresShell::AllocateFrame(size_t aSize)
{
return mFrameArena.AllocateFrame(aSize);
}
void
nsIPresShell::SetAuthorStyleDisabled(PRBool aStyleDisabled)
{
if (aStyleDisabled != mStyleSet->GetAuthorStyleDisabled()) {
mStyleSet->SetAuthorStyleDisabled(aStyleDisabled);
ReconstructStyleData();
}
}
PRBool
nsIPresShell::GetAuthorStyleDisabled()
{
return mStyleSet->GetAuthorStyleDisabled();
}
NS_IMETHODIMP
PresShell::SetPreferenceStyleRules(PRBool aForceReflow)
{
if (!mDocument) {
return NS_ERROR_NULL_POINTER;
}
nsPIDOMWindow *window = mDocument->GetWindow();
// If the document doesn't have a window there's no need to notify
// its presshell about changes to preferences since the document is
// in a state where it doesn't matter any more (see
// DocumentViewerImpl::Close()).
if (!window) {
return NS_ERROR_NULL_POINTER;
}
NS_PRECONDITION(mPresContext, "presContext cannot be null");
if (mPresContext) {
// first, make sure this is not a chrome shell
if (nsContentUtils::IsInChromeDocshell(mDocument)) {
return NS_OK;
}
#ifdef DEBUG_attinasi
printf("Setting Preference Style Rules:\n");
#endif
// if here, we need to create rules for the prefs
// - this includes the background-color, the text-color,
// the link color, the visited link color and the link-underlining
// first clear any exising rules
nsresult result = ClearPreferenceStyleRules();
// now the link rules (must come after the color rules, or links will not be correct color!)
// XXX - when there is both an override and agent pref stylesheet this won't matter,
// as the color rules will be overrides and the links rules will be agent
if (NS_SUCCEEDED(result)) {
result = SetPrefLinkRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefFocusRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoScriptRule();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoFramesRule();
}
#ifdef DEBUG_attinasi
printf( "Preference Style Rules set: error=%ld\n", (long)result);
#endif
// Note that this method never needs to force any calculation; the caller
// will recalculate style if needed
return result;
}
return NS_ERROR_NULL_POINTER;
}
nsresult PresShell::ClearPreferenceStyleRules(void)
{
nsresult result = NS_OK;
if (mPrefStyleSheet) {
NS_ASSERTION(mStyleSet, "null styleset entirely unexpected!");
if (mStyleSet) {
// remove the sheet from the styleset:
// - note that we have to check for success by comparing the count before and after...
#ifdef NS_DEBUG
PRInt32 numBefore = mStyleSet->SheetCount(nsStyleSet::eUserSheet);
NS_ASSERTION(numBefore > 0, "no user stylesheets in styleset, but we have one!");
#endif
mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
#ifdef DEBUG_attinasi
NS_ASSERTION((numBefore - 1) == mStyleSet->GetNumberOfUserStyleSheets(),
"Pref stylesheet was not removed");
printf("PrefStyleSheet removed\n");
#endif
// clear the sheet pointer: it is strictly historical now
mPrefStyleSheet = nsnull;
}
}
return result;
}
nsresult PresShell::CreatePreferenceStyleSheet(void)
{
NS_ASSERTION(!mPrefStyleSheet, "prefStyleSheet already exists");
nsresult result;
mPrefStyleSheet = do_CreateInstance(kCSSStyleSheetCID, &result);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "null but no error");
nsCOMPtr<nsIURI> uri;
result = NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nsnull);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(uri, "null but no error");
result = mPrefStyleSheet->SetURIs(uri, uri, uri);
if (NS_SUCCEEDED(result)) {
mPrefStyleSheet->SetComplete();
PRUint32 index;
result =
mPrefStyleSheet->InsertRuleInternal(NS_LITERAL_STRING("@namespace url(http://www.w3.org/1999/xhtml);"),
0, &index);
if (NS_SUCCEEDED(result)) {
mStyleSet->AppendStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
}
}
}
}
#ifdef DEBUG_attinasi
printf("CreatePrefStyleSheet completed: error=%ld\n",(long)result);
#endif
if (NS_FAILED(result)) {
mPrefStyleSheet = nsnull;
}
return result;
}
// XXX We want these after the @namespace rule. Does order matter
// for these rules, or can we call nsICSSStyleRule::StyleRuleCount()
// and just "append"?
static PRUint32 sInsertPrefSheetRulesAt = 1;
nsresult
PresShell::SetPrefNoScriptRule()
{
nsresult rv = NS_OK;
// also handle the case where print is done from print preview
// see bug #342439 for more details
PRBool scriptEnabled = mDocument->IsScriptEnabled() ||
((mPresContext->Type() == nsPresContext::eContext_PrintPreview ||
mPresContext->Type() == nsPresContext::eContext_Print) &&
NS_PTR_TO_INT32(mDocument->GetProperty(
nsGkAtoms::scriptEnabledBeforePrintOrPreview)));
if (scriptEnabled) {
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
PRUint32 index = 0;
mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("noscript{display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefNoFramesRule(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
PRBool allowSubframes = PR_TRUE;
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (docShell) {
docShell->GetAllowSubframes(&allowSubframes);
}
if (!allowSubframes) {
PRUint32 index = 0;
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("noframes{display:block}"),
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("frame, frameset, iframe {display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefLinkRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// support default link colors:
// this means the link colors need to be overridable,
// which they are if we put them in the agent stylesheet,
// though if using an override sheet this will cause authors grief still
// In the agent stylesheet, they are !important when we are ignoring document colors
nscolor linkColor(mPresContext->DefaultLinkColor());
nscolor activeColor(mPresContext->DefaultActiveLinkColor());
nscolor visitedColor(mPresContext->DefaultVisitedLinkColor());
NS_NAMED_LITERAL_STRING(ruleClose, "}");
PRUint32 index = 0;
nsAutoString strColor;
// insert a rule to color links: '*|*:link {color: #RRGGBB [!important];}'
ColorToString(linkColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:link{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - visited links: '*|*:visited {color: #RRGGBB [!important];}'
ColorToString(visitedColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:visited{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - active links: '*|*:-moz-any-link:active {color: #RRGGBB [!important];}'
ColorToString(activeColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link:active{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
PRBool underlineLinks =
mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
if (underlineLinks) {
// create a rule to make underlining happen
// '*|*:-moz-any-link {text-decoration:[underline|none];}'
// no need for important, we want these to be overridable
// NOTE: these must go in the agent stylesheet or they cannot be
// overridden by authors
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:underline}"),
sInsertPrefSheetRulesAt, &index);
} else {
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:none}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefFocusRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
nsresult result = NS_OK;
if (!mPresContext)
result = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(result) && !mPrefStyleSheet)
result = CreatePreferenceStyleSheet();
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
if (mPresContext->GetUseFocusColors()) {
nscolor focusBackground(mPresContext->FocusBackgroundColor());
nscolor focusText(mPresContext->FocusTextColor());
// insert a rule to make focus the preferred color
PRUint32 index = 0;
nsAutoString strRule, strColor;
///////////////////////////////////////////////////////////////
// - focus: '*:focus
ColorToString(focusText,strColor);
strRule.AppendLiteral("*:focus,*:focus>font {color: ");
strRule.Append(strColor);
strRule.AppendLiteral(" !important; background-color: ");
ColorToString(focusBackground,strColor);
strRule.Append(strColor);
strRule.AppendLiteral(" !important; } ");
// insert the rules
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
}
PRUint8 focusRingWidth = mPresContext->FocusRingWidth();
PRBool focusRingOnAnything = mPresContext->GetFocusRingOnAnything();
PRUint8 focusRingStyle = mPresContext->GetFocusRingStyle();
if ((NS_SUCCEEDED(result) && focusRingWidth != 1 && focusRingWidth <= 4 ) || focusRingOnAnything) {
PRUint32 index = 0;
nsAutoString strRule;
if (!focusRingOnAnything)
strRule.AppendLiteral("*|*:link:focus, *|*:visited"); // If we only want focus rings on the normal things like links
strRule.AppendLiteral(":focus {outline: "); // For example 3px dotted WindowText (maximum 4)
strRule.AppendInt(focusRingWidth);
if (focusRingStyle == 0) // solid
strRule.AppendLiteral("px solid -moz-mac-focusring !important; -moz-outline-radius: 3px; outline-offset: 1px; } ");
else // dotted
strRule.AppendLiteral("px dotted WindowText !important; } ");
// insert the rules
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
if (focusRingWidth != 1) {
// If the focus ring width is different from the default, fix buttons with rings
strRule.AssignLiteral("button::-moz-focus-inner, input[type=\"reset\"]::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]::-moz-focus-inner, ");
strRule.AppendLiteral("input[type=\"submit\"]::-moz-focus-inner { padding: 1px 2px 1px 2px; border: ");
strRule.AppendInt(focusRingWidth);
if (focusRingStyle == 0) // solid
strRule.AppendLiteral("px solid transparent !important; } ");
else
strRule.AppendLiteral("px dotted transparent !important; } ");
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
strRule.AssignLiteral("button:focus::-moz-focus-inner, input[type=\"reset\"]:focus::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]:focus::-moz-focus-inner, input[type=\"submit\"]:focus::-moz-focus-inner {");
strRule.AppendLiteral("border-color: ButtonText !important; }");
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
}
}
}
return result;
}
void
PresShell::AddUserSheet(nsISupports* aSheet)
{
// Make sure this does what DocumentViewerImpl::CreateStyleSet does wrt
// ordering. We want this new sheet to come after all the existing stylesheet
// service sheets, but before other user sheets; see nsIStyleSheetService.idl
// for the ordering. Just remove and readd all the nsStyleSheetService
// sheets.
nsCOMPtr<nsIStyleSheetService> dummy =
do_GetService(NS_STYLESHEETSERVICE_CONTRACTID);
mStyleSet->BeginUpdate();
nsStyleSheetService *sheetService = nsStyleSheetService::gInstance;
nsCOMArray<nsIStyleSheet> & userSheets = *sheetService->UserStyleSheets();
PRInt32 i;
// Iterate forwards when removing so the searches for RemoveStyleSheet are as
// short as possible.
for (i = 0; i < userSheets.Count(); ++i) {
mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, userSheets[i]);
}
// Now iterate backwards, so that the order of userSheets will be the same as
// the order of sheets from it in the style set.
for (i = userSheets.Count() - 1; i >= 0; --i) {
mStyleSet->PrependStyleSheet(nsStyleSet::eUserSheet, userSheets[i]);
}
mStyleSet->EndUpdate();
ReconstructStyleData();
}
void
PresShell::AddAgentSheet(nsISupports* aSheet)
{
// Make sure this does what DocumentViewerImpl::CreateStyleSet does
// wrt ordering.
nsCOMPtr<nsIStyleSheet> sheet = do_QueryInterface(aSheet);
if (!sheet) {
return;
}
mStyleSet->AppendStyleSheet(nsStyleSet::eAgentSheet, sheet);
ReconstructStyleData();
}
void
PresShell::RemoveSheet(nsStyleSet::sheetType aType, nsISupports* aSheet)
{
nsCOMPtr<nsIStyleSheet> sheet = do_QueryInterface(aSheet);
if (!sheet) {
return;
}
mStyleSet->RemoveStyleSheet(aType, sheet);
ReconstructStyleData();
}
NS_IMETHODIMP
PresShell::SetDisplaySelection(PRInt16 aToggle)
{
mSelection->SetDisplaySelection(aToggle);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetDisplaySelection(PRInt16 *aToggle)
{
*aToggle = mSelection->GetDisplaySelection();
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetSelection(SelectionType aType, nsISelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
*aSelection = mSelection->GetSelection(aType);
if (!(*aSelection))
return NS_ERROR_INVALID_ARG;
NS_ADDREF(*aSelection);
return NS_OK;
}
nsISelection*
PresShell::GetCurrentSelection(SelectionType aType)
{
if (!mSelection)
return nsnull;
return mSelection->GetSelection(aType);
}
NS_IMETHODIMP
PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->ScrollSelectionIntoView(aType, aRegion, aIsSynchronous);
}
NS_IMETHODIMP
PresShell::RepaintSelection(SelectionType aType)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->RepaintSelection(aType);
}
// Make shell be a document observer
NS_IMETHODIMP
PresShell::BeginObservingDocument()
{
if (mDocument && !mIsDestroying) {
if (mPresContext->IsDynamic()) {
mDocument->AddObserver(this);
} else {
mDocumentObserverForNonDynamicContext =
new nsDocumentObserverForNonDynamicPresContext(this);
NS_ENSURE_TRUE(mDocumentObserverForNonDynamicContext, NS_ERROR_OUT_OF_MEMORY);
mDocument->AddObserver(mDocumentObserverForNonDynamicContext);
}
if (mIsDocumentGone) {
NS_WARNING("Adding a presshell that was disconnected from the document "
"as a document observer? Sounds wrong...");
mIsDocumentGone = PR_FALSE;
}
}
return NS_OK;
}
// Make shell stop being a document observer
NS_IMETHODIMP
PresShell::EndObservingDocument()
{
// XXXbz do we need to tell the frame constructor that the document
// is gone, perhaps? Except for printing it's NOT gone, sometimes.
mIsDocumentGone = PR_TRUE;
if (mDocument) {
mDocument->RemoveObserver(mDocumentObserverForNonDynamicContext ?
mDocumentObserverForNonDynamicContext.get() :
this);
mDocumentObserverForNonDynamicContext = nsnull;
}
return NS_OK;
}
#ifdef DEBUG_kipp
char* nsPresShell_ReflowStackPointerTop;
#endif
NS_IMETHODIMP
PresShell::GetDidInitialReflow(PRBool *aDidInitialReflow)
{
if (!aDidInitialReflow)
return NS_ERROR_FAILURE;
*aDidInitialReflow = mDidInitialReflow;
return NS_OK;
}
NS_IMETHODIMP
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
if (mIsDestroying) {
return NS_OK;
}
if (!mDocument) {
// Nothing to do
return NS_OK;
}
NS_ASSERTION(!mDidInitialReflow, "Why are we being called?");
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
mDidInitialReflow = PR_TRUE;
#ifdef NS_DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
nsCAutoString url;
uri->GetSpec(url);
printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", (void*)this, url.get());
}
}
}
#endif
if (mCaret)
mCaret->EraseCaret();
// XXX Do a full invalidate at the beginning so that invalidates along
// the way don't have region accumulation issues?
mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight));
// Get the root frame from the frame manager
// XXXbz it would be nice to move this somewhere else... like frame manager
// Init(), say. But we need to make sure our views are all set up by the
// time we do this!
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
NS_ASSERTION(!rootFrame, "How did that happen, exactly?");
if (!rootFrame) {
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->BeginUpdate();
mFrameConstructor->ConstructRootFrame(&rootFrame);
FrameManager()->SetRootFrame(rootFrame);
mFrameConstructor->EndUpdate();
}
NS_ENSURE_STATE(!mHaveShutDown);
if (!rootFrame) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsIContent *root = mDocument->GetRootContent();
if (root) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_RESET(mFrameCreationWatch);
MOZ_TIMER_START(mFrameCreationWatch);
{
nsAutoCauseReflowNotifier reflowNotifier(this);
mFrameConstructor->BeginUpdate();
// Have the style sheet processor construct frame for the root
// content object down
mFrameConstructor->ContentInserted(nsnull, root, 0, nsnull);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_STOP(mFrameCreationWatch);
// Something in mFrameConstructor->ContentInserted may have caused
// Destroy() to get called, bug 337586.
NS_ENSURE_STATE(!mHaveShutDown);
mFrameConstructor->EndUpdate();
}
// nsAutoScriptBlocker going out of scope may have killed us too
NS_ENSURE_STATE(!mHaveShutDown);
// Run the XBL binding constructors for any new frames we've constructed
mDocument->BindingManager()->ProcessAttachedQueue();
// Constructors may have killed us too
NS_ENSURE_STATE(!mHaveShutDown);
// Now flush out pending restyles before we actually reflow, in
// case XBL constructors changed styles somewhere.
{
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->ProcessPendingRestyles();
}
// And that might have run _more_ XBL constructors
NS_ENSURE_STATE(!mHaveShutDown);
}
NS_ASSERTION(rootFrame, "How did that happen?");
// Note: Because the frame just got created, it has the NS_FRAME_IS_DIRTY
// bit set. Unset it so that FrameNeedsReflow() will work right.
NS_ASSERTION(!mDirtyRoots.Contains(rootFrame),
"Why is the root in mDirtyRoots already?");
rootFrame->RemoveStateBits(NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
FrameNeedsReflow(rootFrame, eResize, NS_FRAME_IS_DIRTY);
NS_ASSERTION(mDirtyRoots.Contains(rootFrame),
"Should be in mDirtyRoots now");
NS_ASSERTION(mReflowEvent.IsPending(), "Why no reflow event pending?");
// Restore our root scroll position now if we're getting here after EndLoad
// got called, since this is our one chance to do it. Note that we need not
// have reflowed for this to work; when the scrollframe is finally reflowed
// it'll puick up the position we store in it here.
if (!mDocumentLoading) {
RestoreRootScrollPosition();
}
// For printing, we just immediately unsuppress.
if (!mPresContext->IsPaginated()) {
// Kick off a one-shot timer based off our pref value. When this timer
// fires, if painting is still locked down, then we will go ahead and
// trigger a full invalidate and allow painting to proceed normally.
mPaintingSuppressed = PR_TRUE;
mPaintSuppressionTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPaintSuppressionTimer)
// Uh-oh. We must be out of memory. No point in keeping painting locked down.
mPaintingSuppressed = PR_FALSE;
else {
// Initialize the timer.
// Default to PAINTLOCK_EVENT_DELAY if we can't get the pref value.
PRInt32 delay =
nsContentUtils::GetIntPref("nglayout.initialpaint.delay",
PAINTLOCK_EVENT_DELAY);
mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback,
this, delay,
nsITimer::TYPE_ONE_SHOT);
}
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::sPaintSuppressionCallback(nsITimer *aTimer, void* aPresShell)
{
nsRefPtr<PresShell> self = static_cast<PresShell*>(aPresShell);
if (self)
self->UnsuppressPainting();
}
NS_IMETHODIMP
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
NS_PRECONDITION(!mIsReflowing, "Shouldn't be in reflow here!");
NS_PRECONDITION(aWidth != NS_UNCONSTRAINEDSIZE,
"shouldn't use unconstrained widths anymore");
// If we don't have a root frame yet, that means we haven't had our initial
// reflow... If that's the case, and aWidth or aHeight is unconstrained,
// ignore them altogether.
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame && aHeight == NS_UNCONSTRAINEDSIZE) {
// We can't do the work needed for SizeToContent without a root
// frame, and we want to return before setting the visible area.
return NS_ERROR_NOT_AVAILABLE;
}
mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight));
// There isn't anything useful we can do if the initial reflow hasn't happened
if (!rootFrame)
return NS_OK;
NS_ASSERTION(mViewManager, "Must have view manager");
nsCOMPtr<nsIViewManager> viewManagerDeathGrip = mViewManager;
// Take this ref after viewManager so it'll make sure to go away first
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
if (!GetPresContext()->SupressingResizeReflow())
{
nsIViewManager::UpdateViewBatch batch(mViewManager);
// Make sure style is up to date
{
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->ProcessPendingRestyles();
}
if (!mIsDestroying) {
// XXX Do a full invalidate at the beginning so that invalidates along
// the way don't have region accumulation issues?
{
nsAutoCauseReflowNotifier crNotifier(this);
WillDoReflow();
// Kick off a top-down reflow
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow);
mDirtyRoots.RemoveElement(rootFrame);
DoReflow(rootFrame, PR_TRUE);
}
DidDoReflow(PR_TRUE);
}
batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
}
if (aHeight == NS_UNCONSTRAINEDSIZE) {
mPresContext->SetVisibleArea(
nsRect(0, 0, aWidth, rootFrame->GetRect().height));
}
if (!mIsDestroying && !mResizeEvent.IsPending()) {
nsRefPtr<nsRunnableMethod<PresShell> > resizeEvent =
NS_NEW_RUNNABLE_METHOD(PresShell, this, FireResizeEvent);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(resizeEvent))) {
mResizeEvent = resizeEvent;
}
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::FireResizeEvent()
{
mResizeEvent.Revoke();
if (mIsDocumentGone)
return;
//Send resize event from here.
nsEvent event(PR_TRUE, NS_RESIZE_EVENT);
nsEventStatus status = nsEventStatus_eIgnore;
nsPIDOMWindow *window = mDocument->GetWindow();
if (window) {
nsEventDispatcher::Dispatch(window, mPresContext, &event, nsnull, &status);
// |this| may now be destroyed
}
}
NS_IMETHODIMP
PresShell::SetIgnoreFrameDestruction(PRBool aIgnore)
{
mIgnoreFrameDestruction = aIgnore;
return NS_OK;
}
NS_IMETHODIMP
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame)
{
if (!mIgnoreFrameDestruction) {
mFrameConstructor->NotifyDestroyingFrame(aFrame);
for (PRInt32 idx = mDirtyRoots.Length(); idx; ) {
--idx;
if (mDirtyRoots[idx] == aFrame) {
mDirtyRoots.RemoveElementAt(idx);
}
}
// Notify the frame manager
FrameManager()->NotifyDestroyingFrame(aFrame);
// Remove frame properties
mPresContext->PropertyTable()->DeleteAllPropertiesFor(aFrame);
}
return NS_OK;
}
// note that this can return a null caret, but NS_OK
NS_IMETHODIMP PresShell::GetCaret(nsCaret **outCaret)
{
NS_ENSURE_ARG_POINTER(outCaret);
*outCaret = mCaret;
NS_IF_ADDREF(*outCaret);
return NS_OK;
}
NS_IMETHODIMP_(void) PresShell::MaybeInvalidateCaretPosition()
{
if (mCaret) {
mCaret->InvalidateOutsideCaret();
}
}
void PresShell::SetCaret(nsCaret *aNewCaret)
{
mCaret = aNewCaret;
}
void PresShell::RestoreCaret()
{
mCaret = mOriginalCaret;
}
NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable)
{
PRBool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
/* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled()
nsCOMPtr<nsIDOMSelection> domSel;
if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel)
mCaret->SetCaretDOMSelection(domSel);
*/
mCaret->SetCaretVisible(mCaretEnabled);
}
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretReadOnly(PRBool aReadOnly)
{
if (mCaret)
mCaret->SetCaretReadOnly(aReadOnly);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled)
{
NS_ENSURE_ARG_POINTER(aOutEnabled);
*aOutEnabled = mCaretEnabled;
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretVisibilityDuringSelection(PRBool aVisibility)
{
if (mCaret)
mCaret->SetVisibilityDuringSelection(aVisibility);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaretVisible(PRBool *aOutIsVisible)
{
*aOutIsVisible = PR_FALSE;
if (mCaret) {
nsresult rv = mCaret->GetCaretVisible(aOutIsVisible);
NS_ENSURE_SUCCESS(rv,rv);
}
return NS_OK;
}
NS_IMETHODIMP PresShell::SetSelectionFlags(PRInt16 aInEnable)
{
mSelectionFlags = aInEnable;
return NS_OK;
}
NS_IMETHODIMP PresShell::GetSelectionFlags(PRInt16 *aOutEnable)
{
if (!aOutEnable)
return NS_ERROR_INVALID_ARG;
*aOutEnable = mSelectionFlags;
return NS_OK;
}
//implementation of nsISelectionController
NS_IMETHODIMP
PresShell::CharacterMove(PRBool aForward, PRBool aExtend)
{
return mSelection->CharacterMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::CharacterExtendForDelete()
{
return mSelection->CharacterExtendForDelete();
}
NS_IMETHODIMP
PresShell::WordMove(PRBool aForward, PRBool aExtend)
{
return mSelection->WordMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::WordExtendForDelete(PRBool aForward)
{
return mSelection->WordExtendForDelete(aForward);
}
NS_IMETHODIMP
PresShell::LineMove(PRBool aForward, PRBool aExtend)
{
nsresult result = mSelection->LineMove(aForward, aExtend);
// if we can't go down/up any more we must then move caret completely to
// end/beginning respectively.
if (NS_FAILED(result))
result = CompleteMove(aForward,aExtend);
return result;
}
NS_IMETHODIMP
PresShell::IntraLineMove(PRBool aForward, PRBool aExtend)
{
return mSelection->IntraLineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::PageMove(PRBool aForward, PRBool aExtend)
{
nsresult result;
nsIViewManager* viewManager = GetViewManager();
nsIScrollableView *scrollableView;
if (!viewManager)
return NS_ERROR_UNEXPECTED;
result = viewManager->GetRootScrollableView(&scrollableView);
if (NS_FAILED(result))
return result;
if (!scrollableView)
return NS_ERROR_UNEXPECTED;
nsIView *scrolledView;
result = scrollableView->GetScrolledView(scrolledView);
mSelection->CommonPageMove(aForward, aExtend, scrollableView);
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
}
NS_IMETHODIMP
PresShell::ScrollPage(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
scrollView->ScrollByPages(0, aForward ? 1 : -1, NS_VMREFRESH_SMOOTHSCROLL);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollLine(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
#ifdef MOZ_WIDGET_COCOA
// Emulate the Mac IE behavior of scrolling a minimum of 2 lines
// rather than 1. This vastly improves scrolling speed.
scrollView->ScrollByLines(0, aForward ? 2 : -2, NS_VMREFRESH_SMOOTHSCROLL);
#else
scrollView->ScrollByLines(0, aForward ? 1 : -1, NS_VMREFRESH_SMOOTHSCROLL);
#endif
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->ForceUpdate();
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollHorizontal(PRBool aLeft)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eHorizontal);
if (scrollView) {
scrollView->ScrollByLines(aLeft ? -1 : 1, 0, NS_VMREFRESH_SMOOTHSCROLL);
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->ForceUpdate();
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteScroll(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteMove(PRBool aForward, PRBool aExtend)
{
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
nsIContent* root = mSelection->GetAncestorLimiter();
nsIDocument* doc;
if (root && (doc = root->GetOwnerDoc()) && doc->GetRootContent() != root) {
// Make the caret be either at the very beginning (0) or the very end of
// root. Only do this when not moving to the beginning or end of the
// document (root is null or root is the documentElement), that's handled
// below by moving to beginning or end of the scrollable view.
nsIContent* node = root;
PRInt32 offset = 0;
nsFrameSelection::HINT hint = nsFrameSelection::HINTLEFT;
if (aForward) {
nsIContent* next = node;
PRUint32 count;
while ((count = next->GetChildCount()) > 0) {
node = next;
offset = count;
next = next->GetChildAt(count - 1);
}
if (offset > 0 && node->GetChildAt(offset - 1)->Tag() == nsGkAtoms::br) {
--offset;
hint = nsFrameSelection::HINTRIGHT; // for bug 106855
}
}
mSelection->HandleClick(node, offset, offset, aExtend, PR_FALSE, hint);
// HandleClick resets ancestorLimiter, so set it again.
mSelection->SetAncestorLimiter(root);
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
return
ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
PR_TRUE);
}
nsIFrame *frame = FrameConstructor()->GetRootElementFrame();
if (!frame)
return NS_ERROR_FAILURE;
nsPeekOffsetStruct pos = frame->GetExtremeCaretPosition(!aForward);
mSelection->HandleClick(pos.mResultContent ,pos.mContentOffset ,pos.mContentOffset/*End*/ ,aExtend, PR_FALSE, aForward);
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
PR_TRUE);
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
NS_IMETHODIMP
PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval)
{
if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0)
return NS_ERROR_INVALID_ARG;
*_retval = PR_FALSE; //initialize return parameter
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return NS_ERROR_FAILURE;
nsIFrame *frame = GetPrimaryFrameFor(content);
if (!frame) //no frame to look at so it must not be visible
return NS_OK;
//start process now to go through all frames to find startOffset. then check chars after that to see
//if anything until EndOffset is visible.
PRBool finished = PR_FALSE;
frame->CheckVisibility(mPresContext,startOffset,EndOffset,PR_TRUE,&finished, _retval);
return NS_OK;//dont worry about other return val
}
//end implementations nsISelectionController
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
// At the moment at least, we don't have a root frame before the initial
// reflow; it's safe to just ignore the request in that case
if (!rootFrame)
return NS_OK;
return FrameNeedsReflow(rootFrame, eStyleChange, NS_FRAME_IS_DIRTY);
}
nsIFrame*
nsIPresShell::GetRootFrame() const
{
return FrameManager()->GetRootFrame();
}
nsIFrame*
nsIPresShell::GetRootScrollFrame() const
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
// Ensure root frame is a viewport frame
if (!rootFrame || nsGkAtoms::viewportFrame != rootFrame->GetType())
return nsnull;
nsIFrame* theFrame = rootFrame->GetFirstChild(nsnull);
if (!theFrame || nsGkAtoms::scrollFrame != theFrame->GetType())
return nsnull;
return theFrame;
}
nsIScrollableFrame*
nsIPresShell::GetRootScrollFrameAsScrollable() const
{
nsIFrame* frame = GetRootScrollFrame();
if (!frame)
return nsnull;
nsIScrollableFrame* scrollableFrame = do_QueryFrame(frame);
NS_ASSERTION(scrollableFrame,
"All scroll frames must implement nsIScrollableFrame");
return scrollableFrame;
}
NS_IMETHODIMP
PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull;
nsIFrame* frame = mFrameConstructor->GetPageSequenceFrame();
*aResult = do_QueryFrame(frame);
return *aResult ? NS_OK : NS_ERROR_FAILURE;
}
nsIFrame*
PresShell::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt)
{
return nsLayoutUtils::GetFrameForPoint(aFrame, aPt);
}
void
PresShell::BeginUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
mUpdateCount++;
#endif
mFrameConstructor->BeginUpdate();
if (aUpdateType & UPDATE_STYLE)
mStyleSet->BeginUpdate();
}
void
PresShell::EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's");
--mUpdateCount;
#endif
if (aUpdateType & UPDATE_STYLE) {
mStyleSet->EndUpdate();
if (mStylesHaveChanged)
ReconstructStyleData();
}
mFrameConstructor->EndUpdate();
}
void
PresShell::RestoreRootScrollPosition()
{
// Restore frame state for the root scroll frame
nsCOMPtr<nsILayoutHistoryState> historyState =
mDocument->GetLayoutHistoryState();
// Make sure we don't reenter reflow via the sync paint that happens while
// we're scrolling to our restored position. Entering reflow for the
// scrollable frame will cause it to reenter ScrollToRestoredPosition(), and
// it'll get all confused.
nsAutoScriptBlocker scriptBlocker;
++mChangeNestCount;
if (historyState) {
nsIFrame* scrollFrame = GetRootScrollFrame();
if (scrollFrame) {
nsIScrollableFrame* scrollableFrame = do_QueryFrame(scrollFrame);
if (scrollableFrame) {
FrameManager()->RestoreFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
scrollableFrame->ScrollToRestoredPosition();
}
}
}
--mChangeNestCount;
}
void
PresShell::BeginLoad(nsIDocument *aDocument)
{
#ifdef MOZ_PERF_METRICS
// Reset style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", (void*)this));
#endif
mDocumentLoading = PR_TRUE;
}
void
PresShell::EndLoad(nsIDocument *aDocument)
{
NS_PRECONDITION(aDocument == mDocument, "Wrong document");
RestoreRootScrollPosition();
#ifdef MOZ_PERF_METRICS
// Dump reflow, style resolution and frame construction times here.
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
MOZ_TIMER_LOG(("Reflow time (this=%p): ", this));
MOZ_TIMER_PRINT(mReflowWatch);
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
MOZ_TIMER_LOG(("Frame construction plus style resolution time (this=%p): ", this));
MOZ_TIMER_PRINT(mFrameCreationWatch);
// Print style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this));
#endif
mDocumentLoading = PR_FALSE;
}
#ifdef DEBUG
void
PresShell::VerifyHasDirtyRootAncestor(nsIFrame* aFrame)
{
// XXXbz due to bug 372769, can't actually assert anything here...
return;
// XXXbz shouldn't need this part; remove it once FrameNeedsReflow
// handles the root frame correctly.
if (!aFrame->GetParent()) {
return;
}
// Make sure that there is a reflow root ancestor of |aFrame| that's
// in mDirtyRoots already.
while (aFrame && (aFrame->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN)) {
if (((aFrame->GetStateBits() & NS_FRAME_REFLOW_ROOT) ||
!aFrame->GetParent()) &&
mDirtyRoots.Contains(aFrame)) {
return;
}
aFrame = aFrame->GetParent();
}
NS_NOTREACHED("Frame has dirty bits set but isn't scheduled to be "
"reflowed?");
}
#endif
NS_IMETHODIMP
PresShell::FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty,
nsFrameState aBitToAdd)
{
NS_PRECONDITION(aBitToAdd == NS_FRAME_IS_DIRTY ||
aBitToAdd == NS_FRAME_HAS_DIRTY_CHILDREN,
"Unexpected bits being added");
NS_PRECONDITION(aIntrinsicDirty != eStyleChange ||
aBitToAdd == NS_FRAME_IS_DIRTY,
"bits don't correspond to style change reason");
NS_ASSERTION(!mIsReflowing, "can't mark frame dirty during reflow");
// If we've not yet done the initial reflow, then don't bother
// enqueuing a reflow command yet.
if (! mDidInitialReflow)
return NS_OK;
// If we're already destroying, don't bother with this either.
if (mIsDestroying)
return NS_OK;
#ifdef DEBUG
//printf("gShellCounter: %d\n", gShellCounter++);
if (mInVerifyReflow) {
return NS_OK;
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\nPresShell@%p: frame %p needs reflow\n", (void*)this, (void*)aFrame);
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf("Current content model:\n");
nsIContent *rootContent = mDocument->GetRootContent();
if (rootContent) {
rootContent->List(stdout, 0);
}
}
}
#endif
nsAutoTArray<nsIFrame*, 4> subtrees;
subtrees.AppendElement(aFrame);
do {
nsIFrame *subtreeRoot = subtrees.ElementAt(subtrees.Length() - 1);
subtrees.RemoveElementAt(subtrees.Length() - 1);
// Grab |wasDirty| now so we can go ahead and update the bits on
// subtreeRoot.
PRBool wasDirty = NS_SUBTREE_DIRTY(subtreeRoot);
subtreeRoot->AddStateBits(aBitToAdd);
// Now if subtreeRoot is a reflow root we can cut off this reflow at it if
// the bit being added is NS_FRAME_HAS_DIRTY_CHILDREN.
PRBool targetFrameDirty = (aBitToAdd == NS_FRAME_IS_DIRTY);
#define FRAME_IS_REFLOW_ROOT(_f) \
((_f->GetStateBits() & NS_FRAME_REFLOW_ROOT) && \
(_f != subtreeRoot || !targetFrameDirty))
// Mark the intrinsic widths as dirty on the frame, all of its ancestors,
// and all of its descendants, if needed:
if (aIntrinsicDirty != eResize) {
// Mark argument and all ancestors dirty. (Unless we hit a reflow
// root that should contain the reflow. That root could be
// subtreeRoot itself if it's not dirty, or it could be some
// ancestor of subtreeRoot.)
for (nsIFrame *a = subtreeRoot;
a && !FRAME_IS_REFLOW_ROOT(a);
a = a->GetParent())
a->MarkIntrinsicWidthsDirty();
}
if (aIntrinsicDirty == eStyleChange) {
// Mark all descendants dirty (using an nsTArray stack rather than
// recursion).
nsAutoTArray<nsIFrame*, 32> stack;
stack.AppendElement(subtreeRoot);
do {
nsIFrame *f = stack.ElementAt(stack.Length() - 1);
stack.RemoveElementAt(stack.Length() - 1);
if (f->GetType() == nsGkAtoms::placeholderFrame) {
nsIFrame *oof = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
if (!nsLayoutUtils::IsProperAncestorFrame(subtreeRoot, oof)) {
// We have another distinct subtree we need to mark.
subtrees.AppendElement(oof);
}
}
PRInt32 childListIndex = 0;
nsIAtom *childListName;
do {
childListName = f->GetAdditionalChildListName(childListIndex++);
for (nsIFrame *kid = f->GetFirstChild(childListName); kid;
kid = kid->GetNextSibling()) {
kid->MarkIntrinsicWidthsDirty();
stack.AppendElement(kid);
}
} while (childListName);
} while (stack.Length() != 0);
}
// Set NS_FRAME_HAS_DIRTY_CHILDREN bits (via nsIFrame::ChildIsDirty)
// up the tree until we reach either a frame that's already dirty or
// a reflow root.
nsIFrame *f = subtreeRoot;
for (;;) {
if (FRAME_IS_REFLOW_ROOT(f) || !f->GetParent()) {
// we've hit a reflow root or the root frame
if (!wasDirty) {
mDirtyRoots.AppendElement(f);
}
#ifdef DEBUG
else {
VerifyHasDirtyRootAncestor(f);
}
#endif
break;
}
nsIFrame *child = f;
f = f->GetParent();
wasDirty = NS_SUBTREE_DIRTY(f);
f->ChildIsDirty(child);
NS_ASSERTION(f->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN,
"ChildIsDirty didn't do its job");
if (wasDirty) {
// This frame was already marked dirty.
#ifdef DEBUG
VerifyHasDirtyRootAncestor(f);
#endif
break;
}
}
} while (subtrees.Length() != 0);
PostReflowEvent();
return NS_OK;
}
NS_IMETHODIMP_(void)
PresShell::FrameNeedsToContinueReflow(nsIFrame *aFrame)
{
NS_ASSERTION(mIsReflowing, "Must be in reflow when marking path dirty.");
NS_PRECONDITION(mCurrentReflowRoot, "Must have a current reflow root here");
NS_ASSERTION(aFrame == mCurrentReflowRoot ||
nsLayoutUtils::IsProperAncestorFrame(mCurrentReflowRoot, aFrame),
"Frame passed in is not the descendant of mCurrentReflowRoot");
NS_ASSERTION(aFrame->GetStateBits() & NS_FRAME_IN_REFLOW,
"Frame passed in not in reflow?");
mFramesToDirty.PutEntry(aFrame);
}
nsIScrollableView*
PresShell::GetViewToScroll(nsLayoutUtils::Direction aDirection)
{
nsIScrollableView* scrollView = nsnull;
nsCOMPtr<nsIContent> focusedContent;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm && mDocument) {
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(mDocument->GetWindow());
nsCOMPtr<nsIDOMElement> focusedElement;
fm->GetFocusedElementForWindow(window, PR_FALSE, nsnull, getter_AddRefs(focusedElement));
focusedContent = do_QueryInterface(focusedElement);
}
if (!focusedContent && mSelection) {
nsISelection* domSelection = mSelection->
GetSelection(nsISelectionController::SELECTION_NORMAL);
if (domSelection) {
nsCOMPtr<nsIDOMNode> focusedNode;
domSelection->GetFocusNode(getter_AddRefs(focusedNode));
focusedContent = do_QueryInterface(focusedNode);
}
}
if (focusedContent) {
nsIFrame* startFrame = GetPrimaryFrameFor(focusedContent);
if (startFrame) {
nsIScrollableViewProvider* svp = do_QueryFrame(startFrame);
// If this very frame provides a scroll view, start there instead of frame's
// closest view, because the scroll view may be inside a child frame.
// For example, this happens in the case of overflow:scroll.
// In that case we still use GetNearestScrollingView() because
// we need a scrolling view that matches aDirection.
nsIScrollableView* sv;
nsIView* startView = svp && (sv = svp->GetScrollableView()) ? sv->View() : startFrame->GetClosestView();
NS_ASSERTION(startView, "No view to start searching for scrollable view from");
scrollView = nsLayoutUtils::GetNearestScrollingView(startView, aDirection);
}
}
if (!scrollView) {
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->GetRootScrollableView(&scrollView);
}
}
return scrollView;
}
NS_IMETHODIMP
PresShell::CancelAllPendingReflows()
{
mDirtyRoots.Clear();
return NS_OK;
}
#ifdef ACCESSIBILITY
void nsIPresShell::InvalidateAccessibleSubtree(nsIContent *aContent)
{
if (gIsAccessibilityActive) {
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
accService->InvalidateSubtreeFor(this, aContent,
nsIAccessibleEvent::EVENT_ASYNCH_SIGNIFICANT_CHANGE);
}
}
}
#endif
NS_IMETHODIMP
PresShell::RecreateFramesFor(nsIContent* aContent)
{
NS_ENSURE_TRUE(mPresContext, NS_ERROR_FAILURE);
if (!mDidInitialReflow) {
// Nothing to do here. In fact, if we proceed and aContent is the
// root we will crash.
return NS_OK;
}
if (!mPresContext->IsDynamic()) {
return NS_OK;
}
// Don't call RecreateFramesForContent since that is not exported and we want
// to keep the number of entrypoints down.
NS_ASSERTION(mViewManager, "Should have view manager");
nsIViewManager::UpdateViewBatch batch(mViewManager);
// Have to make sure that the content notifications are flushed before we
// start messing with the frame model; otherwise we can get content doubling.
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
nsAutoScriptBlocker scriptBlocker;
nsStyleChangeList changeList;
changeList.AppendChange(nsnull, aContent, nsChangeHint_ReconstructFrame);
// Mark ourselves as not safe to flush while we're doing frame construction.
++mChangeNestCount;
nsresult rv = mFrameConstructor->ProcessRestyledFrames(changeList);
--mChangeNestCount;
batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(aContent);
#endif
return rv;
}
void
nsIPresShell::PostRecreateFramesFor(nsIContent* aContent)
{
FrameConstructor()->PostRestyleEvent(aContent, eReStyle_Self,
nsChangeHint_ReconstructFrame);
}
NS_IMETHODIMP
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
mPresContext->EventStateManager()->ClearFrameRefs(aFrame);
if (aFrame == mCurrentEventFrame) {
mCurrentEventContent = aFrame->GetContent();
mCurrentEventFrame = nsnull;
}
#ifdef NS_DEBUG
if (aFrame == mDrawEventTargetFrame) {
mDrawEventTargetFrame = nsnull;
}
#endif
for (unsigned int i=0; i < mCurrentEventFrameStack.Length(); i++) {
if (aFrame == mCurrentEventFrameStack.ElementAt(i)) {
//One of our stack frames was deleted. Get its content so that when we
//pop it we can still get its new frame from its content
nsIContent *currentEventContent = aFrame->GetContent();
mCurrentEventContentStack.ReplaceObjectAt(currentEventContent, i);
mCurrentEventFrameStack[i] = nsnull;
}
}
mFramesToDirty.RemoveEntry(aFrame);
nsWeakFrame* weakFrame = mWeakFrames;
while (weakFrame) {
nsWeakFrame* prev = weakFrame->GetPreviousWeakFrame();
if (weakFrame->GetFrame() == aFrame) {
// This removes weakFrame from mWeakFrames.
weakFrame->Clear(this);
}
weakFrame = prev;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsIWidget* widget = nsnull;
nsPoint offset(0,0);
if (mPresContext->IsScreen()) {
// Get the widget to create the rendering context for and calculate
// the offset from the frame to it. (Calculating the offset is important
// if the frame isn't the root frame.)
nsPoint viewOffset;
nsIView* view = aFrame->GetClosestView(&viewOffset);
nsPoint widgetOffset;
widget = view->GetNearestWidget(&widgetOffset);
offset = viewOffset + widgetOffset;
} else {
nsIFrame* pageFrame = nsLayoutUtils::GetPageFrame(aFrame);
// This might not always come up with a frame, i.e. during reflow;
// that's fine, because the translation doesn't matter during reflow.
if (pageFrame)
offset = aFrame->GetOffsetTo(pageFrame);
}
nsresult rv;
nsIRenderingContext* result = nsnull;
nsIDeviceContext *deviceContext = mPresContext->DeviceContext();
if (widget) {
rv = deviceContext->CreateRenderingContext(widget, result);
}
else {
rv = deviceContext->CreateRenderingContext(result);
}
*aResult = result;
if (NS_SUCCEEDED(rv)) {
result->Translate(offset.x, offset.y);
}
return rv;
}
NS_IMETHODIMP
PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
{
if (!mDocument) {
return NS_ERROR_FAILURE;
}
// Hold a reference to the ESM in case event dispatch tears us down.
nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
if (aAnchorName.IsEmpty()) {
NS_ASSERTION(!aScroll, "can't scroll to empty anchor name");
esm->SetContentState(nsnull, NS_EVENT_STATE_URLTARGET);
return NS_OK;
}
nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(mDocument);
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
// Search for an element with a matching "id" attribute
if (doc) {
nsCOMPtr<nsIDOMElement> element;
rv = doc->GetElementById(aAnchorName, getter_AddRefs(element));
if (NS_SUCCEEDED(rv) && element) {
// Get the nsIContent interface, because that's what we need to
// get the primary frame
content = do_QueryInterface(element);
}
}
// Search for an anchor element with a matching "name" attribute
if (!content && htmlDoc) {
nsCOMPtr<nsIDOMNodeList> list;
// Find a matching list of named nodes
rv = htmlDoc->GetElementsByName(aAnchorName, getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; PR_TRUE; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Ensure it's an anchor element
content = do_QueryInterface(node);
if (content) {
if (content->Tag() == nsGkAtoms::a &&
content->IsNodeOfType(nsINode::eHTML)) {
break;
}
content = nsnull;
}
}
}
}
// Search for anchor in the HTML namespace with a matching name
if (!content && !htmlDoc)
{
nsCOMPtr<nsIDOMNodeList> list;
NS_NAMED_LITERAL_STRING(nameSpace, "http://www.w3.org/1999/xhtml");
// Get the list of anchor elements
rv = doc->GetElementsByTagNameNS(nameSpace, NS_LITERAL_STRING("a"), getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; PR_TRUE; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Compare the name attribute
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
nsAutoString value;
if (element && NS_SUCCEEDED(element->GetAttribute(NS_LITERAL_STRING("name"), value))) {
if (value.Equals(aAnchorName)) {
content = do_QueryInterface(element);
break;
}
}
}
}
}
nsCOMPtr<nsIDOMRange> jumpToRange;
nsCOMPtr<nsIXPointerResult> xpointerResult;
if (!content) {
nsCOMPtr<nsIDOMXMLDocument> xmldoc = do_QueryInterface(mDocument);
if (xmldoc) {
// Try XPointer
xmldoc->EvaluateXPointer(aAnchorName, getter_AddRefs(xpointerResult));
if (xpointerResult) {
xpointerResult->Item(0, getter_AddRefs(jumpToRange));
if (!jumpToRange) {
// We know it was an XPointer, so there is no point in
// trying any other pointer types, let's just return
// an error.
return NS_ERROR_FAILURE;
}
}
// Finally try FIXptr
if (!jumpToRange) {
xmldoc->EvaluateFIXptr(aAnchorName,getter_AddRefs(jumpToRange));
}
if (jumpToRange) {
nsCOMPtr<nsIDOMNode> node;
jumpToRange->GetStartContainer(getter_AddRefs(node));
if (node) {
PRUint16 nodeType;
node->GetNodeType(&nodeType);
PRInt32 offset = -1;
jumpToRange->GetStartOffset(&offset);
switch (nodeType) {
case nsIDOMNode::ATTRIBUTE_NODE:
{
// XXX Assuming jumping to the ownerElement is the sanest action.
nsCOMPtr<nsIAttribute> attr = do_QueryInterface(node);
content = attr->GetContent();
break;
}
case nsIDOMNode::DOCUMENT_NODE:
{
if (offset >= 0) {
nsCOMPtr<nsIDocument> document = do_QueryInterface(node);
content = document->GetChildAt(offset);
}
break;
}
case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
case nsIDOMNode::ELEMENT_NODE:
case nsIDOMNode::ENTITY_REFERENCE_NODE:
{
if (offset >= 0) {
nsCOMPtr<nsIContent> parent = do_QueryInterface(node);
content = parent->GetChildAt(offset);
}
break;
}
case nsIDOMNode::CDATA_SECTION_NODE:
case nsIDOMNode::COMMENT_NODE:
case nsIDOMNode::TEXT_NODE:
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
{
// XXX This should scroll to a specific position in the text.
content = do_QueryInterface(node);
break;
}
}
}
}
}
}
esm->SetContentState(content, NS_EVENT_STATE_URLTARGET);
if (content) {
if (aScroll) {
rv = ScrollContentIntoView(content, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE);
NS_ENSURE_SUCCESS(rv, rv);
nsIScrollableFrame* rootScroll = GetRootScrollFrameAsScrollable();
if (rootScroll) {
mLastAnchorScrolledTo = content;
mLastAnchorScrollPositionY = rootScroll->GetScrollPosition().y;
}
}
// Should we select the target? This action is controlled by a
// preference: the default is to not select.
PRBool selectAnchor = nsContentUtils::GetBoolPref("layout.selectanchor");
// Even if select anchor pref is false, we must still move the
// caret there. That way tabbing will start from the new
// location
if (!jumpToRange) {
jumpToRange = do_CreateInstance(kRangeCID);
if (jumpToRange) {
while (content && content->GetChildCount() > 0) {
content = content->GetChildAt(0);
}
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(content));
NS_ASSERTION(node, "No nsIDOMNode for descendant of anchor");
jumpToRange->SelectNodeContents(node);
}
}
if (jumpToRange) {
// Select the anchor
nsISelection* sel = mSelection->
GetSelection(nsISelectionController::SELECTION_NORMAL);
if (sel) {
sel->RemoveAllRanges();
sel->AddRange(jumpToRange);
if (!selectAnchor) {
// Use a caret (collapsed selection) at the start of the anchor
sel->CollapseToStart();
}
}
if (selectAnchor && xpointerResult) {
// Select the rest (if any) of the ranges in XPointerResult
PRUint32 count, i;
xpointerResult->GetLength(&count);
for (i = 1; i < count; i++) { // jumpToRange is i = 0
nsCOMPtr<nsIDOMRange> range;
xpointerResult->Item(i, getter_AddRefs(range));
sel->AddRange(range);
}
}
// Selection is at anchor.
// Now focus the document itself if focus is on an element within it.
nsPIDOMWindow *win = mDocument->GetWindow();
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm && win) {
nsCOMPtr<nsIDOMWindow> focusedWindow;
fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
if (SameCOMIdentity(win, focusedWindow))
fm->ClearFocus(focusedWindow);
}
}
} else {
rv = NS_ERROR_FAILURE; //changed to NS_OK in quirks mode if ScrollTo is called
// Scroll to the top/left if the anchor can not be
// found and it is labelled top (quirks mode only). @see bug 80784
if ((NS_LossyConvertUTF16toASCII(aAnchorName).LowerCaseEqualsLiteral("top")) &&
(mPresContext->CompatibilityMode() == eCompatibility_NavQuirks)) {
rv = NS_OK;
// Check |aScroll| after setting |rv| so we set |rv| to the same
// thing whether or not |aScroll| is true.
if (aScroll && mViewManager) {
// Get the viewport scroller
nsIScrollableView* scrollingView;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
// Scroll to the top of the page
scrollingView->ScrollTo(0, 0, 0);
}
}
}
}
return rv;
}
NS_IMETHODIMP
PresShell::ScrollToAnchor()
{
if (!mLastAnchorScrolledTo)
return NS_OK;
nsIScrollableFrame* rootScroll = GetRootScrollFrameAsScrollable();
if (!rootScroll ||
mLastAnchorScrollPositionY != rootScroll->GetScrollPosition().y)
return NS_OK;
nsresult rv = ScrollContentIntoView(mLastAnchorScrolledTo, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE);
mLastAnchorScrolledTo = nsnull;
return rv;
}
/*
* Helper (per-continuation) for ScrollContentIntoView.
*
* @param aFrame [in] Frame whose bounds should be unioned
* @param aVPercent [in] same as for ScrollContentIntoView
* @param aRect [inout] rect into which its bounds should be unioned
* @param aHaveRect [inout] whether aRect contains data yet
* @param aClosestScrolledView [inout] the view to which aRect is relative.
* If null, should be filled in appropriately. If non-null, the function
* will no-op if the closest scrolling view doesn't match.
*/
static void
UnionRectForClosestScrolledView(nsIFrame* aFrame,
PRIntn aVPercent,
nsRect& aRect,
PRBool& aHaveRect,
nsIView*& aClosestScrolledView)
{
nsRect frameBounds = aFrame->GetRect();
nsPoint offset;
nsIView* closestView;
aFrame->GetOffsetFromView(offset, &closestView);
frameBounds.MoveTo(offset);
// If this is an inline frame and either the bounds height is 0 (quirks
// layout model) or aVPercent is not NS_PRESSHELL_SCROLL_ANYWHERE, we need to
// change the top of the bounds to include the whole line.
if (frameBounds.height == 0 || aVPercent != NS_PRESSHELL_SCROLL_ANYWHERE) {
nsIAtom* frameType = NULL;
nsIFrame *prevFrame = aFrame;
nsIFrame *f = aFrame;
while (f &&
(frameType = f->GetType()) == nsGkAtoms::inlineFrame) {
prevFrame = f;
f = prevFrame->GetParent();
}
if (f != aFrame &&
f &&
frameType == nsGkAtoms::blockFrame) {
// find the line containing aFrame and increase the top of |offset|.
nsAutoLineIterator lines = f->GetLineIterator();
if (lines) {
PRInt32 index = lines->FindLineContaining(prevFrame);
if (index >= 0) {
nsIFrame *trash1;
PRInt32 trash2;
nsRect lineBounds;
PRUint32 trash3;
if (NS_SUCCEEDED(lines->GetLine(index, &trash1, &trash2,
lineBounds, &trash3))) {
nsPoint blockOffset;
nsIView* blockView;
f->GetOffsetFromView(blockOffset, &blockView);
if (blockView == closestView) {
// XXX If views not equal, this is hard. Do we want to bother?
nscoord newoffset = lineBounds.y + blockOffset.y;
if (newoffset < frameBounds.y)
frameBounds.y = newoffset;
}
}
}
}
}
}
NS_ASSERTION(closestView && !closestView->ToScrollableView(),
"What happened to the scrolled view? "
"The frame should not be directly in the scrolling view!");
// Walk up the view hierarchy. Make sure to add the view's position
// _after_ we get the parent and see whether it's scrollable. We want to
// make sure to get the scrolled view's position after it has been scrolled.
while (closestView) {
nsIView* parent = closestView->GetParent();
if (parent && parent->ToScrollableView())
break;
frameBounds += closestView->GetPosition();
closestView = parent;
}
if (!aClosestScrolledView)
aClosestScrolledView = closestView;
if (aClosestScrolledView == closestView) {
if (aHaveRect) {
// We can't use nsRect::UnionRect since it drops empty rects on
// the floor, and we need to include them. (Thus we need
// aHaveRect to know when to drop the initial value on the floor.)
aRect.UnionRectIncludeEmpty(aRect, frameBounds);
} else {
aHaveRect = PR_TRUE;
aRect = frameBounds;
}
}
}
/**
* This function takes a scrolling view, a rect, and a scroll position and
* attempts to scroll that rect to that position in that view. The rect
* should be in the coordinate system of the _scrolled_ view.
*/
static void ScrollViewToShowRect(nsIScrollableView* aScrollingView,
nsRect & aRect,
PRIntn aVPercent,
PRIntn aHPercent)
{
// Determine the visible rect in the scrolling view's coordinate space.
// The size of the visible area is the clip view size
nsRect visibleRect = aScrollingView->View()->GetBounds(); // get width and height
aScrollingView->GetScrollPosition(visibleRect.x, visibleRect.y);
// The actual scroll offsets
nscoord scrollOffsetX = visibleRect.x;
nscoord scrollOffsetY = visibleRect.y;
nscoord lineHeight;
aScrollingView->GetLineHeight(&lineHeight);
// See how the rect should be positioned vertically
if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent ||
(NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent &&
aRect.height < lineHeight)) {
// The caller doesn't care where the frame is positioned vertically,
// so long as it's fully visible
if (aRect.y < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.YMost() > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) {
// Scroll only if no part of the frame is visible in this view
if (aRect.YMost() - lineHeight < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.y + lineHeight > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignY =
NSToCoordRound(aRect.y + aRect.height * (aVPercent / 100.0f));
scrollOffsetY =
NSToCoordRound(frameAlignY - visibleRect.height * (aVPercent / 100.0f));
}
// See how the frame should be positioned horizontally
if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent ||
(NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent &&
aRect.width < lineHeight)) {
// The caller doesn't care where the frame is positioned horizontally,
// so long as it's fully visible
if (aRect.x < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.XMost() > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) {
// Scroll only if no part of the frame is visible in this view
// XXXbz using the line height here is odd, but there are no
// natural dimensions to use here, really....
if (aRect.XMost() - lineHeight < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.x + lineHeight > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignX =
NSToCoordRound(aRect.x + (aRect.width) * (aHPercent / 100.0f));
scrollOffsetX =
NSToCoordRound(frameAlignX - visibleRect.width * (aHPercent / 100.0f));
}
aScrollingView->ScrollTo(scrollOffsetX, scrollOffsetY, 0);
}
NS_IMETHODIMP
PresShell::ScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent)
{
nsCOMPtr<nsIContent> content = aContent; // Keep content alive while flushing.
NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDocument> currentDoc = content->GetCurrentDoc();
NS_ENSURE_STATE(currentDoc);
mContentToScrollTo = aContent;
mContentScrollVPosition = aVPercent;
mContentScrollHPosition = aHPercent;
// Flush layout and attempt to scroll in the process.
currentDoc->FlushPendingNotifications(Flush_InterruptibleLayout);
// If mContentToScrollTo is non-null, that means we interrupted the reflow
// (or suppressed it altogether because we're suppressing interruptible
// flushes right now) and won't necessarily get the position correct, but do
// a best-effort scroll here. The other option would be to do this inside
// FlushPendingNotifications, but I'm not sure the repeated scrolling that
// could trigger if reflows keep getting interrupted would be more desirable
// than a single best-effort scroll followed by one final scroll on the first
// completed reflow.
if (mContentToScrollTo) {
DoScrollContentIntoView(content, aVPercent, aHPercent);
}
return NS_OK;
}
void
PresShell::DoScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent)
{
nsIFrame* frame = GetPrimaryFrameFor(aContent);
if (!frame) {
mContentToScrollTo = nsnull;
return;
}
if (frame->GetStateBits() & NS_FRAME_FIRST_REFLOW) {
// The reflow flush before this scroll got interrupted, and this frame's
// coords and size are all zero, and it has no content showing anyway.
// Don't bother scrolling to it. We'll try again when we finish up layout.
return;
}
// This is a two-step process.
// Step 1: Find the bounds of the rect we want to scroll into view. For
// example, for an inline frame we may want to scroll in the whole
// line.
// Step 2: Walk the views that are parents of the frame and scroll them
// appropriately.
nsIView *closestView = nsnull;
nsRect frameBounds;
PRBool haveRect = PR_FALSE;
do {
UnionRectForClosestScrolledView(frame, aVPercent, frameBounds, haveRect,
closestView);
} while ((frame = frame->GetNextContinuation()));
// Walk up the view hierarchy. Make sure to add the view's position
// _after_ we get the parent and see whether it's scrollable. We want to
// make sure to get the scrolled view's position after it has been scrolled.
nsIScrollableView* scrollingView = nsnull;
while (closestView) {
nsIView* parent = closestView->GetParent();
if (parent) {
scrollingView = parent->ToScrollableView();
if (scrollingView) {
ScrollViewToShowRect(scrollingView, frameBounds, aVPercent, aHPercent);
}
}
frameBounds += closestView->GetPosition();
closestView = parent;
}
}
// GetLinkLocation: copy link location to clipboard
NS_IMETHODIMP PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString)
{
#ifdef DEBUG_dr
printf("dr :: PresShell::GetLinkLocation\n");
#endif
NS_ENSURE_ARG_POINTER(aNode);
nsresult rv;
nsAutoString anchorText;
static char strippedChars[] = {'\t','\r','\n'};
// are we an anchor?
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(aNode));
nsCOMPtr<nsIDOMHTMLAreaElement> area;
nsCOMPtr<nsIDOMHTMLLinkElement> link;
nsAutoString xlinkType;
if (anchor) {
rv = anchor->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// area?
area = do_QueryInterface(aNode);
if (area) {
rv = area->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// link?
link = do_QueryInterface(aNode);
if (link) {
rv = link->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// Xlink?
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aNode));
if (element) {
NS_NAMED_LITERAL_STRING(xlinkNS,"http://www.w3.org/1999/xlink");
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("type"),xlinkType);
if (xlinkType.EqualsLiteral("simple")) {
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("href"),anchorText);
if (!anchorText.IsEmpty()) {
// Resolve the full URI using baseURI property
nsAutoString base;
nsCOMPtr<nsIDOM3Node> node(do_QueryInterface(aNode,&rv));
NS_ENSURE_SUCCESS(rv, rv);
node->GetBaseURI(base);
nsCOMPtr<nsIIOService>
ios(do_GetService("@mozilla.org/network/io-service;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> baseURI;
rv = ios->NewURI(NS_ConvertUTF16toUTF8(base),nsnull,nsnull,getter_AddRefs(baseURI));
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString spec;
rv = baseURI->Resolve(NS_ConvertUTF16toUTF8(anchorText),spec);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(spec, anchorText);
}
}
}
}
}
}
if (anchor || area || link || xlinkType.EqualsLiteral("simple")) {
//Remove all the '\t', '\r' and '\n' from 'anchorText'
anchorText.StripChars(strippedChars);
aLocationString = anchorText;
return NS_OK;
}
// if no link, fail.
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
PresShell::GetSelectionForCopy(nsISelection** outSelection)
{
nsresult rv = NS_OK;
*outSelection = nsnull;
if (!mDocument) return NS_ERROR_FAILURE;
nsCOMPtr<nsIContent> content;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(mDocument->GetWindow());
nsCOMPtr<nsIDOMElement> focusedElement;
fm->GetFocusedElementForWindow(window, PR_FALSE, nsnull, getter_AddRefs(focusedElement));
content = do_QueryInterface(focusedElement);
}
nsCOMPtr<nsISelection> sel;
if (content)
{
//check to see if we need to get selection from frame
//optimization that MAY need to be expanded as more things implement their own "selection"
nsCOMPtr<nsIDOMNSHTMLInputElement> htmlInputElement(do_QueryInterface(content));
nsCOMPtr<nsIDOMNSHTMLTextAreaElement> htmlTextAreaElement(do_QueryInterface(content));
if (htmlInputElement || htmlTextAreaElement)
{
nsIFrame *htmlInputFrame = GetPrimaryFrameFor(content);
if (!htmlInputFrame) return NS_ERROR_FAILURE;
nsCOMPtr<nsISelectionController> selCon;
rv = htmlInputFrame->
GetSelectionController(mPresContext,getter_AddRefs(selCon));
if (NS_FAILED(rv)) return rv;
if (!selCon) return NS_ERROR_FAILURE;
rv = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(sel));
}
}
if (!sel) {
sel = mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL);
rv = NS_OK;
}
*outSelection = sel;
NS_IF_ADDREF(*outSelection);
return rv;
}
/* Just hook this call into InvalidateOverflowRect */
void
PresShell::InvalidateFrameForView(nsIView *aView)
{
nsIFrame* frame = nsLayoutUtils::GetFrameFor(aView);
if (frame)
frame->InvalidateOverflowRect();
}
NS_IMETHODIMP_(void)
PresShell::DispatchSynthMouseMove(nsGUIEvent *aEvent,
PRBool aFlushOnHoverChange)
{
PRUint32 hoverGenerationBefore = mFrameConstructor->GetHoverGeneration();
nsEventStatus status;
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->DispatchEvent(aEvent, rootView, &status);
if (aFlushOnHoverChange &&
hoverGenerationBefore != mFrameConstructor->GetHoverGeneration()) {
// Flush so that the resulting reflow happens now so that our caller
// can suppress any synthesized mouse moves caused by that reflow.
FlushPendingNotifications(Flush_Layout);
}
}
NS_IMETHODIMP
PresShell::DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& aOutValue)
{
aOutValue.Truncate();
if (!mDocument) return NS_ERROR_FAILURE;
nsresult rv;
nsCOMPtr<nsISelection> sel;
// Now we have the selection. Make sure it's nonzero:
if (aSelectionOnly)
{
rv = GetSelectionForCopy(getter_AddRefs(sel));
if (NS_FAILED(rv)) return rv;
if (!sel) return NS_ERROR_FAILURE;
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
}
// call the copy code
return nsCopySupport::GetContents(aMimeType, aFlags, sel,
mDocument, aOutValue);
}
NS_IMETHODIMP
PresShell::DoCopy()
{
if (!mDocument) return NS_ERROR_FAILURE;
nsCOMPtr<nsISelection> sel;
nsresult rv = GetSelectionForCopy(getter_AddRefs(sel));
if (NS_FAILED(rv))
return rv;
if (!sel)
return NS_ERROR_FAILURE;
// Now we have the selection. Make sure it's nonzero:
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
// call the copy code
rv = nsCopySupport::HTMLCopy(sel, mDocument, nsIClipboard::kGlobalClipboard);
if (NS_FAILED(rv))
return rv;
// Now that we have copied, update the Paste menu item
nsPIDOMWindow *domWindow = mDocument->GetWindow();
if (domWindow)
{
domWindow->UpdateCommands(NS_LITERAL_STRING("clipboard"));
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPage)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
// We actually have to mess with the docshell here, since we want to
// store the state back in it.
// XXXbz this isn't really right, since this is being called in the
// content viewer's Hide() method... by that point the docshell's
// state could be wrong. We should sort out a better ownership
// model for the layout history state.
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (!docShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsILayoutHistoryState> historyState;
docShell->GetLayoutHistoryState(getter_AddRefs(historyState));
if (!historyState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState));
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
docShell->SetLayoutHistoryState(historyState);
}
*aState = historyState;
NS_IF_ADDREF(*aState);
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame) return NS_OK;
// Capture frame state for the root scroll frame
// Don't capture state when first creating doc element hierarchy
// As the scroll position is 0 and this will cause us to lose
// our previously saved place!
if (aLeavingPage) {
nsIFrame* scrollFrame = GetRootScrollFrame();
if (scrollFrame) {
FrameManager()->CaptureFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
}
}
FrameManager()->CaptureFrameState(rootFrame, historyState);
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsPaintingSuppressed(PRBool* aResult)
{
*aResult = mPaintingSuppressed;
return NS_OK;
}
void
PresShell::UnsuppressAndInvalidate()
{
if (!mPresContext->EnsureVisible() || mHaveShutDown) {
// No point; we're about to be torn down anyway.
return;
}
mPaintingSuppressed = PR_FALSE;
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
// let's assume that outline on a root frame is not supported
nsRect rect(nsPoint(0, 0), rootFrame->GetSize());
rootFrame->Invalidate(rect);
}
mPresContext->RootPresContext()->UpdatePluginGeometry(rootFrame);
// now that painting is unsuppressed, focus may be set on the document
nsPIDOMWindow *win = mDocument->GetWindow();
if (win)
win->SetReadyForFocus();
if (!mHaveShutDown && mViewManager)
mViewManager->SynthesizeMouseMove(PR_FALSE);
}
NS_IMETHODIMP
PresShell::UnsuppressPainting()
{
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
if (mIsDocumentGone || !mPaintingSuppressed)
return NS_OK;
// If we have reflows pending, just wait until we process
// the reflows and get all the frames where we want them
// before actually unlocking the painting. Otherwise
// go ahead and unlock now.
if (mDirtyRoots.Length() > 0)
mShouldUnsuppressPainting = PR_TRUE;
else
UnsuppressAndInvalidate();
return NS_OK;
}
NS_IMETHODIMP
PresShell::DisableThemeSupport()
{
// Doesn't have to be dynamic. Just set the bool.
mIsThemeSupportDisabled = PR_TRUE;
return NS_OK;
}
PRBool
PresShell::IsThemeSupportEnabled()
{
return !mIsThemeSupportDisabled;
}
// Post a request to handle an arbitrary callback after reflow has finished.
NS_IMETHODIMP
PresShell::PostReflowCallback(nsIReflowCallback* aCallback)
{
void* result = AllocateFrame(sizeof(nsCallbackEventRequest));
if (NS_UNLIKELY(!result)) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCallbackEventRequest* request = (nsCallbackEventRequest*)result;
request->callback = aCallback;
request->next = nsnull;
if (mLastCallbackEventRequest) {
mLastCallbackEventRequest = mLastCallbackEventRequest->next = request;
} else {
mFirstCallbackEventRequest = request;
mLastCallbackEventRequest = request;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* before = nsnull;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
if (callback == aCallback)
{
nsCallbackEventRequest* toFree = node;
if (node == mFirstCallbackEventRequest) {
node = node->next;
mFirstCallbackEventRequest = node;
NS_ASSERTION(before == nsnull, "impossible");
} else {
node = node->next;
before->next = node;
}
if (toFree == mLastCallbackEventRequest) {
mLastCallbackEventRequest = before;
}
FreeFrame(sizeof(nsCallbackEventRequest), toFree);
} else {
before = node;
node = node->next;
}
}
return NS_OK;
}
void
PresShell::CancelPostedReflowCallbacks()
{
while (mFirstCallbackEventRequest) {
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
mFirstCallbackEventRequest = node->next;
if (!mFirstCallbackEventRequest) {
mLastCallbackEventRequest = nsnull;
}
nsIReflowCallback* callback = node->callback;
FreeFrame(sizeof(nsCallbackEventRequest), node);
if (callback) {
callback->ReflowCallbackCanceled();
}
}
}
void
PresShell::HandlePostedReflowCallbacks(PRBool aInterruptible)
{
PRBool shouldFlush = PR_FALSE;
while (mFirstCallbackEventRequest) {
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
mFirstCallbackEventRequest = node->next;
if (!mFirstCallbackEventRequest) {
mLastCallbackEventRequest = nsnull;
}
nsIReflowCallback* callback = node->callback;
FreeFrame(sizeof(nsCallbackEventRequest), node);
if (callback) {
if (callback->ReflowFinished()) {
shouldFlush = PR_TRUE;
}
}
}
mozFlushType flushType =
aInterruptible ? Flush_InterruptibleLayout : Flush_Layout;
if (shouldFlush)
FlushPendingNotifications(flushType);
}
NS_IMETHODIMP
PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush)
{
// Not safe if we are reflowing or in the middle of frame construction
aIsSafeToFlush = !mIsReflowing &&
!mChangeNestCount;
if (aIsSafeToFlush) {
// Not safe if we are painting
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
PRBool isPainting = PR_FALSE;
viewManager->IsPainting(isPainting);
if (isPainting) {
aIsSafeToFlush = PR_FALSE;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::FlushPendingNotifications(mozFlushType aType)
{
NS_ASSERTION(aType >= Flush_Frames, "Why did we get called?");
PRBool isSafeToFlush;
IsSafeToFlush(isSafeToFlush);
isSafeToFlush = isSafeToFlush && nsContentUtils::IsSafeToRunScript();
NS_ASSERTION(!isSafeToFlush || mViewManager, "Must have view manager");
// Make sure the view manager stays alive while batching view updates.
nsCOMPtr<nsIViewManager> viewManagerDeathGrip = mViewManager;
if (isSafeToFlush && mViewManager) {
// Processing pending notifications can kill us, and some callers only
// hold weak refs when calling FlushPendingNotifications(). :(
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
if (mResizeEvent.IsPending()) {
FireResizeEvent();
if (mIsDestroying) {
return NS_OK;
}
}
// Style reresolves not in conjunction with reflows can't cause
// painting or geometry changes, so don't bother with view update
// batching if we only have style reresolve
nsIViewManager::UpdateViewBatch batch(mViewManager);
// Force flushing of any pending content notifications that might have
// queued up while our event was pending. That will ensure that we don't
// construct frames for content right now that's still waiting to be
// notified on,
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
// Process pending restyles, since any flush of the presshell wants
// up-to-date style data.
if (!mIsDestroying) {
mPresContext->FlushPendingMediaFeatureValuesChanged();
// Flush any pending update of the user font set, since that could
// cause style changes (for updating ex/ch units, and to cause a
// reflow).
mPresContext->FlushUserFontSet();
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->ProcessPendingRestyles();
}
// Process whatever XBL constructors those restyles queued up. This
// ensures that onload doesn't fire too early and that we won't do extra
// reflows after those constructors run.
if (!mIsDestroying) {
mDocument->BindingManager()->ProcessAttachedQueue();
}
// Now those constructors might have posted restyle events. At the same
// time, we still need up-to-date style data. In particular, reflow
// depends on style being completely up to date. If it's not, then style
// context reparenting, which can happen during reflow, might suddenly pick
// up the new rules and we'll end up with frames whose style doesn't match
// the frame type.
if (!mIsDestroying) {
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->ProcessPendingRestyles();
}
// There might be more pending constructors now, but we're not going to
// worry about them. They can't be triggered during reflow, so we should
// be good.
if (aType >= (mSuppressInterruptibleReflows ? Flush_Layout : Flush_InterruptibleLayout) &&
!mIsDestroying) {
mFrameConstructor->RecalcQuotesAndCounters();
mViewManager->FlushDelayedResize();
if (ProcessReflowCommands(aType < Flush_Layout) && mContentToScrollTo) {
// We didn't get interrupted. Go ahead and scroll to our content
DoScrollContentIntoView(mContentToScrollTo, mContentScrollVPosition,
mContentScrollHPosition);
mContentToScrollTo = nsnull;
}
}
PRUint32 updateFlags = NS_VMREFRESH_NO_SYNC;
if (aType >= Flush_Display) {
// Flushing paints, so perform the invalidates and drawing
// immediately
updateFlags = NS_VMREFRESH_IMMEDIATE;
}
else if (aType < Flush_InterruptibleLayout) {
// Not flushing reflows, so do deferred invalidates. This will keep us
// from possibly flushing out reflows due to invalidates being processed
// at the end of this view batch.
updateFlags = NS_VMREFRESH_DEFERRED;
}
batch.EndUpdateViewBatch(updateFlags);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsReflowLocked(PRBool* aIsReflowLocked)
{
*aIsReflowLocked = mIsReflowing;
return NS_OK;
}
void
PresShell::CharacterDataChanged(nsIDocument *aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected CharacterDataChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
nsAutoCauseReflowNotifier crNotifier(this);
if (mCaret) {
// Invalidate the caret's current location before we call into the frame
// constructor. It is important to do this now, and not wait until the
// resulting reflow, because this call causes continuation frames of the
// text frame the caret is in to forget what part of the content they
// refer to, making it hard for them to return the correct continuation
// frame to the caret.
mCaret->InvalidateOutsideCaret();
}
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
nsIContent *container = aContent->GetParent();
PRUint32 selectorFlags =
container ? (container->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0;
if (selectorFlags != 0 && !aContent->IsRootOfAnonymousSubtree()) {
PRUint32 index;
if (aInfo->mAppend &&
container->GetChildAt((index = container->GetChildCount() - 1)) ==
aContent)
mFrameConstructor->RestyleForAppend(container, index);
else
mFrameConstructor->RestyleForInsertOrChange(container, aContent);
}
mFrameConstructor->CharacterDataChanged(aContent, aInfo->mAppend);
VERIFY_STYLE_TREE;
}
void
PresShell::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentStatesChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
if (mDidInitialReflow) {
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->ContentStatesChanged(aContent1, aContent2, aStateMask);
VERIFY_STYLE_TREE;
}
}
void
PresShell::AttributeChanged(nsIDocument* aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
PRUint32 aStateMask)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected AttributeChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
// XXXwaterson it might be more elegant to wait until after the
// initial reflow to begin observing the document. That would
// squelch any other inappropriate notifications as well.
if (mDidInitialReflow) {
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->AttributeChanged(aContent, aNameSpaceID,
aAttribute, aModType, aStateMask);
VERIFY_STYLE_TREE;
}
}
void
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentAppended");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRECONDITION(aContainer, "must have container");
if (!mDidInitialReflow) {
return;
}
nsAutoCauseReflowNotifier crNotifier(this);
MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_START(mFrameCreationWatch);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
mFrameConstructor->RestyleForAppend(aContainer, aNewIndexInContainer);
mFrameConstructor->ContentAppended(aContainer, aNewIndexInContainer);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
}
void
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentInserted");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
if (!mDidInitialReflow) {
return;
}
nsAutoCauseReflowNotifier crNotifier(this);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
if (aContainer)
mFrameConstructor->RestyleForInsertOrChange(aContainer, aChild);
mFrameConstructor->ContentInserted(aContainer, aChild,
aIndexInContainer, nsnull);
VERIFY_STYLE_TREE;
}
void
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentRemoved");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
// Make sure that the caret doesn't leave a turd where the child used to be.
if (mCaret) {
mCaret->InvalidateOutsideCaret();
}
// Notify the ESM that the content has been removed, so that
// it can clean up any state related to the content.
mPresContext->EventStateManager()->ContentRemoved(aDocument, aChild);
nsAutoCauseReflowNotifier crNotifier(this);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
if (aContainer)
mFrameConstructor->RestyleForRemove(aContainer, aChild, aIndexInContainer);
PRBool didReconstruct;
mFrameConstructor->ContentRemoved(aContainer, aChild, aIndexInContainer,
nsCSSFrameConstructor::REMOVE_CONTENT,
&didReconstruct);
VERIFY_STYLE_TREE;
}
nsresult
PresShell::ReconstructFrames(void)
{
if (!mPresContext || !mPresContext->IsDynamic()) {
return NS_OK;
}
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->BeginUpdate();
nsresult rv = mFrameConstructor->ReconstructDocElementHierarchy();
VERIFY_STYLE_TREE;
mFrameConstructor->EndUpdate();
return rv;
}
void
nsIPresShell::ReconstructStyleDataInternal()
{
mStylesHaveChanged = PR_FALSE;
if (mIsDestroying) {
// We don't want to mess with restyles at this point
return;
}
if (mPresContext) {
mPresContext->RebuildUserFontSet();
}
nsIContent* root = mDocument->GetRootContent();
if (!mDidInitialReflow) {
// Nothing to do here, since we have no frames yet
return;
}
if (!root) {
// No content to restyle
return;
}
mFrameConstructor->PostRestyleEvent(root, eReStyle_Self, NS_STYLE_HINT_NONE);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(nsnull);
#endif
}
void
nsIPresShell::ReconstructStyleDataExternal()
{
ReconstructStyleDataInternal();
}
void
PresShell::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet)
{
// We only care when enabled sheets are added
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable && aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet)
{
// We only care when enabled sheets are removed
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable && aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleSheetApplicableStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aApplicable)
{
if (aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
void
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
void
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
nsIFrame*
PresShell::GetPrimaryFrameFor(nsIContent* aContent) const
{
return FrameManager()->GetPrimaryFrameFor(aContent, -1);
}
nsIFrame*
PresShell::GetRealPrimaryFrameFor(nsIContent* aContent) const
{
nsIFrame *primaryFrame = FrameManager()->GetPrimaryFrameFor(aContent, -1);
if (!primaryFrame)
return nsnull;
return nsPlaceholderFrame::GetRealFrameFor(primaryFrame);
}
NS_IMETHODIMP
PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
*aResult = FrameManager()->GetPlaceholderFrameFor(aFrame);
return NS_OK;
}
//nsIViewObserver
NS_IMETHODIMP
PresShell::ComputeRepaintRegionForCopy(nsIView* aRootView,
nsIView* aMovingView,
nsPoint aDelta,
const nsRect& aCopyRect,
nsRegion* aRepaintRegion)
{
return nsLayoutUtils::ComputeRepaintRegionForCopy(
static_cast<nsIFrame*>(aRootView->GetClientData()),
static_cast<nsIFrame*>(aMovingView->GetClientData()),
aDelta, aCopyRect, aRepaintRegion);
}
NS_IMETHODIMP
PresShell::RenderDocument(const nsRect& aRect, PRUint32 aFlags,
nscolor aBackgroundColor,
gfxContext* aThebesContext)
{
NS_ENSURE_TRUE(!(aFlags & RENDER_IS_UNTRUSTED), NS_ERROR_NOT_IMPLEMENTED);
gfxRect r(0, 0,
nsPresContext::AppUnitsToFloatCSSPixels(aRect.width),
nsPresContext::AppUnitsToFloatCSSPixels(aRect.height));
aThebesContext->Save();
aThebesContext->NewPath();
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
aThebesContext->Rectangle(r, PR_TRUE);
#else
aThebesContext->Rectangle(r);
#endif
aThebesContext->Clip();
// we can avoid using a temporary surface if we're using OPERATOR_OVER
// and our background color has no alpha (so we'll be compositing on top
// of a fully opaque solid color region)
PRBool needsGroup = PR_TRUE;
if (aThebesContext->CurrentOperator() == gfxContext::OPERATOR_OVER &&
NS_GET_A(aBackgroundColor) == 0xff)
needsGroup = PR_FALSE;
if (needsGroup) {
aThebesContext->PushGroup(NS_GET_A(aBackgroundColor) == 0xff ?
gfxASurface::CONTENT_COLOR :
gfxASurface::CONTENT_COLOR_ALPHA);
aThebesContext->Save();
}
// draw background color
if (NS_GET_A(aBackgroundColor) > 0) {
aThebesContext->SetColor(gfxRGBA(aBackgroundColor));
aThebesContext->SetOperator(gfxContext::OPERATOR_SOURCE);
aThebesContext->Paint();
}
// we want the window to be composited as a single image using
// whatever operator was set; set OPERATOR_OVER here, which is
// either already the case, or overrides the operator in a group.
// the original operator will be present when we PopGroup.
aThebesContext->SetOperator(gfxContext::OPERATOR_OVER);
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
nsDisplayListBuilder builder(rootFrame, PR_FALSE,
(aFlags & RENDER_CARET) != 0);
nsDisplayList list;
nsRect rect(aRect);
nsIFrame* rootScrollFrame = GetRootScrollFrame();
if ((aFlags & RENDER_IGNORE_VIEWPORT_SCROLLING) && rootScrollFrame) {
nsPoint pos = GetRootScrollFrameAsScrollable()->GetScrollPosition();
rect.MoveBy(-pos);
builder.SetIgnoreScrollFrame(rootScrollFrame);
}
builder.SetBackgroundOnly(PR_FALSE);
builder.EnterPresShell(rootFrame, rect);
// Add the canvas background color.
nsresult rv =
rootFrame->PresContext()->PresShell()->AddCanvasBackgroundColorItem(
builder, list, rootFrame);
if (NS_SUCCEEDED(rv)) {
rv = rootFrame->BuildDisplayListForStackingContext(&builder, rect, &list);
}
builder.LeavePresShell(rootFrame, rect);
if (NS_SUCCEEDED(rv)) {
// Ensure that r.x,r.y gets drawn at (0,0)
aThebesContext->Save();
aThebesContext->Translate(gfxPoint(-nsPresContext::AppUnitsToFloatCSSPixels(rect.x),
-nsPresContext::AppUnitsToFloatCSSPixels(rect.y)));
nsIDeviceContext* devCtx = mPresContext->DeviceContext();
gfxFloat scale = gfxFloat(devCtx->AppUnitsPerDevPixel())/nsPresContext::AppUnitsPerCSSPixel();
aThebesContext->Scale(scale, scale);
nsCOMPtr<nsIRenderingContext> rc;
devCtx->CreateRenderingContextInstance(*getter_AddRefs(rc));
rc->Init(devCtx, aThebesContext);
nsRegion region(rect);
list.OptimizeVisibility(&builder, &region);
list.Paint(&builder, rc, rect);
// Flush the list so we don't trigger the IsEmpty-on-destruction assertion
list.DeleteAll();
aThebesContext->Restore();
}
}
// if we had to use a group, paint it to the destination now
if (needsGroup) {
aThebesContext->Restore();
aThebesContext->PopGroupToSource();
aThebesContext->Paint();
}
aThebesContext->Restore();
return NS_OK;
}
/*
* Clip the display list aList to a range. Returns the clipped
* rectangle surrounding the range.
*/
nsRect
PresShell::ClipListToRange(nsDisplayListBuilder *aBuilder,
nsDisplayList* aList,
nsIRange* aRange)
{
// iterate though the display items and add up the bounding boxes of each.
// This will allow the total area of the frames within the range to be
// determined. To do this, remove an item from the bottom of the list, check
// whether it should be part of the range, and if so, append it to the top
// of the temporary list tmpList. If the item is a text frame at the end of
// the selection range, wrap it in an nsDisplayClip to clip the display to
// the portion of the text frame that is part of the selection. Then, append
// the wrapper to the top of the list. Otherwise, just delete the item and
// don't append it.
nsRect surfaceRect;
nsDisplayList tmpList;
nsDisplayItem* i;
while ((i = aList->RemoveBottom())) {
// itemToInsert indiciates the item that should be inserted into the
// temporary list. If null, no item should be inserted.
nsDisplayItem* itemToInsert = nsnull;
nsIFrame* frame = i->GetUnderlyingFrame();
if (frame) {
nsIContent* content = frame->GetContent();
if (content) {
PRBool atStart = (content == aRange->GetStartParent());
PRBool atEnd = (content == aRange->GetEndParent());
if ((atStart || atEnd) && frame->GetType() == nsGkAtoms::textFrame) {
PRInt32 frameStartOffset, frameEndOffset;
frame->GetOffsets(frameStartOffset, frameEndOffset);
PRInt32 hilightStart =
atStart ? PR_MAX(aRange->StartOffset(), frameStartOffset) : frameStartOffset;
PRInt32 hilightEnd =
atEnd ? PR_MIN(aRange->EndOffset(), frameEndOffset) : frameEndOffset;
if (hilightStart < hilightEnd) {
// determine the location of the start and end edges of the range.
nsPoint startPoint, endPoint;
frame->GetPointFromOffset(hilightStart, &startPoint);
frame->GetPointFromOffset(hilightEnd, &endPoint);
// the clip rectangle is determined by taking the the start and
// end points of the range, offset from the reference frame.
// Because of rtl, the end point may be to the left of the
// start point, so x is set to the lowest value
nsRect textRect(aBuilder->ToReferenceFrame(frame), frame->GetSize());
nscoord x = PR_MIN(startPoint.x, endPoint.x);
textRect.x += x;
textRect.width = PR_MAX(startPoint.x, endPoint.x) - x;
surfaceRect.UnionRect(surfaceRect, textRect);
// wrap the item in an nsDisplayClip so that it can be clipped to
// the selection. If the allocation fails, fall through and delete
// the item below.
itemToInsert = new (aBuilder)nsDisplayClip(frame, frame, i, textRect);
}
}
else {
// if the node is within the range, append it to the temporary list
PRBool before, after;
nsRange::CompareNodeToRange(content, aRange, &before, &after);
if (!before && !after) {
itemToInsert = i;
surfaceRect.UnionRect(surfaceRect, i->GetBounds(aBuilder));
}
}
}
}
// insert the item into the list if necessary. If the item has a child
// list, insert that as well
nsDisplayList* sublist = i->GetList();
if (itemToInsert || sublist) {
tmpList.AppendToTop(itemToInsert ? itemToInsert : i);
// if the item is a list, iterate over it as well
if (sublist)
surfaceRect.UnionRect(surfaceRect,
ClipListToRange(aBuilder, sublist, aRange));
}
else {
// otherwise, just delete the item and don't readd it to the list
i->~nsDisplayItem();
}
}
// now add all the items back onto the original list again
aList->AppendToTop(&tmpList);
return surfaceRect;
}
RangePaintInfo*
PresShell::CreateRangePaintInfo(nsIDOMRange* aRange,
nsRect& aSurfaceRect)
{
RangePaintInfo* info = nsnull;
nsCOMPtr<nsIRange> range = do_QueryInterface(aRange);
if (!range)
return nsnull;
nsIFrame* ancestorFrame;
nsIFrame* rootFrame = GetRootFrame();
// If the start or end of the range is the document, just use the root
// frame, otherwise get the common ancestor of the two endpoints of the
// range.
nsINode* startParent = range->GetStartParent();
nsINode* endParent = range->GetEndParent();
nsIDocument* doc = startParent->GetCurrentDoc();
if (startParent == doc || endParent == doc) {
ancestorFrame = rootFrame;
}
else {
nsINode* ancestor = nsContentUtils::GetCommonAncestor(startParent, endParent);
NS_ASSERTION(!ancestor || ancestor->IsNodeOfType(nsINode::eCONTENT),
"common ancestor is not content");
if (!ancestor || !ancestor->IsNodeOfType(nsINode::eCONTENT))
return nsnull;
nsIContent* ancestorContent = static_cast<nsIContent*>(ancestor);
ancestorFrame = GetPrimaryFrameFor(ancestorContent);
// use the nearest ancestor frame that includes all continuations as the
// root for building the display list
while (ancestorFrame &&
nsLayoutUtils::GetNextContinuationOrSpecialSibling(ancestorFrame))
ancestorFrame = ancestorFrame->GetParent();
}
if (!ancestorFrame)
return nsnull;
info = new RangePaintInfo(range, ancestorFrame);
if (!info)
return nsnull;
nsRect ancestorRect = ancestorFrame->GetOverflowRect();
// get a display list containing the range
info->mBuilder.SetPaintAllFrames();
info->mBuilder.EnterPresShell(ancestorFrame, ancestorRect);
ancestorFrame->BuildDisplayListForStackingContext(&info->mBuilder,
ancestorRect, &info->mList);
info->mBuilder.LeavePresShell(ancestorFrame, ancestorRect);
nsRect rangeRect = ClipListToRange(&info->mBuilder, &info->mList, range);
// determine the offset of the reference frame for the display list
// to the root frame. This will allow the coordinates used when painting
// to all be offset from the same point
info->mRootOffset = ancestorFrame->GetOffsetTo(rootFrame);
rangeRect.MoveBy(info->mRootOffset);
aSurfaceRect.UnionRect(aSurfaceRect, rangeRect);
return info;
}
already_AddRefed<gfxASurface>
PresShell::PaintRangePaintInfo(nsTArray<nsAutoPtr<RangePaintInfo> >* aItems,
nsISelection* aSelection,
nsIRegion* aRegion,
nsRect aArea,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
nsPresContext* pc = GetPresContext();
if (!pc || aArea.width == 0 || aArea.height == 0)
return nsnull;
nsIDeviceContext* deviceContext = pc->DeviceContext();
// use the rectangle to create the surface
nsIntRect pixelArea = aArea.ToOutsidePixels(pc->AppUnitsPerDevPixel());
// if the area of the image is larger than the maximum area, scale it down
float scale = 0.0;
nsIntRect rootScreenRect = GetRootFrame()->GetScreenRect();
// if the image is larger in one or both directions than half the size of
// the available screen area, scale the image down to that size.
nsRect maxSize;
deviceContext->GetClientRect(maxSize);
nscoord maxWidth = pc->AppUnitsToDevPixels(maxSize.width >> 1);
nscoord maxHeight = pc->AppUnitsToDevPixels(maxSize.height >> 1);
PRBool resize = (pixelArea.width > maxWidth || pixelArea.height > maxHeight);
if (resize) {
scale = 1.0;
// divide the maximum size by the image size in both directions. Whichever
// direction produces the smallest result determines how much should be
// scaled.
if (pixelArea.width > maxWidth)
scale = PR_MIN(scale, float(maxWidth) / pixelArea.width);
if (pixelArea.height > maxHeight)
scale = PR_MIN(scale, float(maxHeight) / pixelArea.height);
pixelArea.width = NSToIntFloor(float(pixelArea.width) * scale);
pixelArea.height = NSToIntFloor(float(pixelArea.height) * scale);
// adjust the screen position based on the rescaled size
nscoord left = rootScreenRect.x + pixelArea.x;
nscoord top = rootScreenRect.y + pixelArea.y;
aScreenRect->x = NSToIntFloor(aPoint.x - float(aPoint.x - left) * scale);
aScreenRect->y = NSToIntFloor(aPoint.y - float(aPoint.y - top) * scale);
}
else {
// move aScreenRect to the position of the surface in screen coordinates
aScreenRect->MoveTo(rootScreenRect.x + pixelArea.x, rootScreenRect.y + pixelArea.y);
}
aScreenRect->width = pixelArea.width;
aScreenRect->height = pixelArea.height;
gfxImageSurface* surface =
new gfxImageSurface(gfxIntSize(pixelArea.width, pixelArea.height),
gfxImageSurface::ImageFormatARGB32);
if (!surface || surface->CairoStatus()) {
delete surface;
return nsnull;
}
// clear the image
gfxContext context(surface);
context.SetOperator(gfxContext::OPERATOR_CLEAR);
context.Rectangle(gfxRect(0, 0, pixelArea.width, pixelArea.height));
context.Fill();
nsCOMPtr<nsIRenderingContext> rc;
deviceContext->CreateRenderingContextInstance(*getter_AddRefs(rc));
rc->Init(deviceContext, surface);
if (aRegion)
rc->SetClipRegion(*aRegion, nsClipCombine_kReplace);
if (resize)
rc->Scale(scale, scale);
// translate so that points are relative to the surface area
rc->Translate(-aArea.x, -aArea.y);
// temporarily hide the selection so that text is drawn normally. If a
// selection is being rendered, use that, otherwise use the presshell's
// selection.
nsCOMPtr<nsFrameSelection> frameSelection;
if (aSelection) {
nsCOMPtr<nsISelectionPrivate> selpriv = do_QueryInterface(aSelection);
selpriv->GetFrameSelection(getter_AddRefs(frameSelection));
}
else {
frameSelection = FrameSelection();
}
PRInt16 oldDisplaySelection = frameSelection->GetDisplaySelection();
frameSelection->SetDisplaySelection(nsISelectionController::SELECTION_HIDDEN);
// next, paint each range in the selection
PRInt32 count = aItems->Length();
for (PRInt32 i = 0; i < count; i++) {
RangePaintInfo* rangeInfo = (*aItems)[i];
// the display lists paint relative to the offset from the reference
// frame, so translate the rendering context
nsIRenderingContext::AutoPushTranslation
translate(rc, rangeInfo->mRootOffset.x, rangeInfo->mRootOffset.y);
aArea.MoveBy(-rangeInfo->mRootOffset.x, -rangeInfo->mRootOffset.y);
rangeInfo->mList.Paint(&rangeInfo->mBuilder, rc, aArea);
aArea.MoveBy(rangeInfo->mRootOffset.x, rangeInfo->mRootOffset.y);
}
// restore the old selection display state
frameSelection->SetDisplaySelection(oldDisplaySelection);
NS_ADDREF(surface);
return surface;
}
already_AddRefed<gfxASurface>
PresShell::RenderNode(nsIDOMNode* aNode,
nsIRegion* aRegion,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
// area will hold the size of the surface needed to draw the node, measured
// from the root frame.
nsRect area;
nsTArray<nsAutoPtr<RangePaintInfo> > rangeItems;
// nothing to draw if the node isn't in a document
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
if (!node->IsInDoc())
return nsnull;
nsCOMPtr<nsIDOMRange> range;
NS_NewRange(getter_AddRefs(range));
if (NS_FAILED(range->SelectNode(aNode)))
return nsnull;
RangePaintInfo* info = CreateRangePaintInfo(range, area);
if (info && !rangeItems.AppendElement(info)) {
delete info;
return nsnull;
}
if (aRegion) {
// combine the area with the supplied region
nsIntRect rrectPixels;
aRegion->GetBoundingBox(&rrectPixels.x, &rrectPixels.y,
&rrectPixels.width, &rrectPixels.height);
nsRect rrect = rrectPixels.ToAppUnits(nsPresContext::AppUnitsPerCSSPixel());
area.IntersectRect(area, rrect);
nsPresContext* pc = GetPresContext();
if (!pc)
return nsnull;
// move the region so that it is offset from the topleft corner of the surface
aRegion->Offset(-rrectPixels.x + (rrectPixels.x - pc->AppUnitsToDevPixels(area.x)),
-rrectPixels.y + (rrectPixels.y - pc->AppUnitsToDevPixels(area.y)));
}
return PaintRangePaintInfo(&rangeItems, nsnull, aRegion, area, aPoint,
aScreenRect);
}
already_AddRefed<gfxASurface>
PresShell::RenderSelection(nsISelection* aSelection,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
// area will hold the size of the surface needed to draw the selection,
// measured from the root frame.
nsRect area;
nsTArray<nsAutoPtr<RangePaintInfo> > rangeItems;
// iterate over each range and collect them into the rangeItems array.
// This is done so that the size of selection can be determined so as
// to allocate a surface area
PRInt32 numRanges;
aSelection->GetRangeCount(&numRanges);
NS_ASSERTION(numRanges > 0, "RenderSelection called with no selection");
for (PRInt32 r = 0; r < numRanges; r++)
{
nsCOMPtr<nsIDOMRange> range;
aSelection->GetRangeAt(r, getter_AddRefs(range));
RangePaintInfo* info = CreateRangePaintInfo(range, area);
if (info && !rangeItems.AppendElement(info)) {
delete info;
return nsnull;
}
}
return PaintRangePaintInfo(&rangeItems, aSelection, nsnull, area, aPoint,
aScreenRect);
}
nsresult PresShell::AddCanvasBackgroundColorItem(nsDisplayListBuilder& aBuilder,
nsDisplayList& aList,
nsIFrame* aFrame,
nsRect* aBounds,
nscolor aBackstopColor)
{
// We don't want to add an item for the canvas background color if the frame
// (sub)tree we are painting doesn't include any canvas frames. There isn't
// an easy way to check this directly, but if we check if the root of the
// (sub)tree we are painting is a canvas frame that should cover us in all
// cases (it will usually be a viewport frame when we have a canvas frame in
// the (sub)tree).
if (!nsCSSRendering::IsCanvasFrame(aFrame))
return NS_OK;
nscolor bgcolor = NS_ComposeColors(aBackstopColor, mCanvasBackgroundColor);
nsRect bounds = aBounds == nsnull ?
nsRect(aBuilder.ToReferenceFrame(aFrame), aFrame->GetSize()) : *aBounds;
return aList.AppendNewToBottom(new (&aBuilder) nsDisplaySolidColor(
aFrame,
bounds,
bgcolor));
}
void PresShell::UpdateCanvasBackground()
{
// If we have a frame tree and it has style information that
// specifies the background color of the canvas, update our local
// cache of that color.
nsIFrame* rootFrame = FrameConstructor()->GetRootElementStyleFrame();
if (rootFrame) {
const nsStyleBackground* bgStyle =
nsCSSRendering::FindRootFrameBackground(rootFrame);
// XXX We should really be passing the canvasframe, not the root element
// style frame but we don't have access to the canvasframe here. It isn't
// a problem because only a few frames can return something other than true
// and none of them would be a canvas frame or root element style frame.
mCanvasBackgroundColor =
nsCSSRendering::DetermineBackgroundColor(GetPresContext(), *bgStyle,
rootFrame);
}
// If the root element of the document (ie html) has style 'display: none'
// then the document's background color does not get drawn; cache the
// color we actually draw.
if (!FrameConstructor()->GetRootElementFrame()) {
mCanvasBackgroundColor = mPresContext->DefaultBackgroundColor();
}
}
nscolor PresShell::ComputeBackstopColor(nsIView* aView)
{
nsIWidget* widget = aView->GetNearestWidget(nsnull);
if (widget && widget->GetTransparencyMode() != eTransparencyOpaque) {
// Within a transparent widget, so the backstop color must be
// totally transparent.
return NS_RGBA(0,0,0,0);
}
// Within an opaque widget (or no widget at all), so the backstop
// color must be totally opaque. The user's default background
// as reported by the prescontext is guaranteed to be opaque.
return GetPresContext()->DefaultBackgroundColor();
}
NS_IMETHODIMP
PresShell::Paint(nsIView* aView,
nsIRenderingContext* aRenderingContext,
const nsRegion& aDirtyRegion)
{
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Paint);
NS_ASSERTION(!mIsDestroying, "painting a destroyed PresShell");
NS_ASSERTION(aView, "null view");
nscolor bgcolor = ComputeBackstopColor(aView);
nsIFrame* frame = static_cast<nsIFrame*>(aView->GetClientData());
if (frame) {
nsLayoutUtils::PaintFrame(aRenderingContext, frame, aDirtyRegion, bgcolor);
} else {
bgcolor = NS_ComposeColors(bgcolor, mCanvasBackgroundColor);
aRenderingContext->SetColor(bgcolor);
aRenderingContext->FillRect(aDirtyRegion.GetBounds());
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::PaintDefaultBackground(nsIView* aView,
nsIRenderingContext* aRenderingContext,
const nsRect& aDirtyRect)
{
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Paint);
NS_ASSERTION(!mIsDestroying, "painting a destroyed PresShell");
NS_ASSERTION(aView, "null view");
// We must not look at the frame tree, so all we have to use is the canvas
// default color as set above.
nscolor bgcolor = NS_ComposeColors(ComputeBackstopColor(aView),
mCanvasBackgroundColor);
aRenderingContext->SetColor(bgcolor);
aRenderingContext->FillRect(aDirtyRect);
return NS_OK;
}
nsIFrame*
PresShell::GetCurrentEventFrame()
{
if (NS_UNLIKELY(mIsDestroying)) {
return nsnull;
}
if (!mCurrentEventFrame && mCurrentEventContent) {
// Make sure the content still has a document reference. If not,
// then we assume it is no longer in the content tree and the
// frame shouldn't get an event, nor should we even assume its
// safe to try and find the frame.
if (mCurrentEventContent->GetDocument()) {
mCurrentEventFrame = GetPrimaryFrameFor(mCurrentEventContent);
}
}
return mCurrentEventFrame;
}
NS_IMETHODIMP
PresShell::GetEventTargetFrame(nsIFrame** aFrame)
{
*aFrame = GetCurrentEventFrame();
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent)
{
if (mCurrentEventContent) {
*aContent = mCurrentEventContent;
NS_IF_ADDREF(*aContent);
} else {
nsIFrame* currentEventFrame = GetCurrentEventFrame();
if (currentEventFrame) {
currentEventFrame->GetContentForEvent(mPresContext, aEvent, aContent);
} else {
*aContent = nsnull;
}
}
return NS_OK;
}
void
PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent)
{
if (mCurrentEventFrame || mCurrentEventContent) {
mCurrentEventFrameStack.InsertElementAt(0, mCurrentEventFrame);
mCurrentEventContentStack.InsertObjectAt(mCurrentEventContent, 0);
}
mCurrentEventFrame = aFrame;
mCurrentEventContent = aContent;
}
void
PresShell::PopCurrentEventInfo()
{
mCurrentEventFrame = nsnull;
mCurrentEventContent = nsnull;
if (0 != mCurrentEventFrameStack.Length()) {
mCurrentEventFrame = mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
mCurrentEventContent = mCurrentEventContentStack.ObjectAt(0);
mCurrentEventContentStack.RemoveObjectAt(0);
}
}
PRBool PresShell::InZombieDocument(nsIContent *aContent)
{
// If a content node points to a null document, or the document is not
// attached to a window, then it is possibly in a zombie document,
// about to be replaced by a newly loading document.
// Such documents cannot handle DOM events.
// It might actually be in a node not attached to any document,
// in which case there is not parent presshell to retarget it to.
nsIDocument *doc = aContent->GetDocument();
return !doc || !doc->GetWindow();
}
nsresult PresShell::RetargetEventToParent(nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
// Send this events straight up to the parent pres shell.
// We do this for keystroke events in zombie documents or if either a frame
// or a root content is not present.
// That way at least the UI key bindings can work.
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container)
container = do_QueryReferent(mForwardingContainer);
// Now, find the parent pres shell and send the event there
nsCOMPtr<nsIDocShellTreeItem> treeItem =
do_QueryInterface(container);
if (!treeItem) {
// Might have gone away, or never been around to start with
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
treeItem->GetParent(getter_AddRefs(parentTreeItem));
nsCOMPtr<nsIDocShell> parentDocShell =
do_QueryInterface(parentTreeItem);
if (!parentDocShell || treeItem == parentTreeItem) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIPresShell> parentPresShell;
parentDocShell->GetPresShell(getter_AddRefs(parentPresShell));
nsCOMPtr<nsIViewObserver> parentViewObserver =
do_QueryInterface(parentPresShell);
if (!parentViewObserver) {
return NS_ERROR_FAILURE;
}
// Fake the event as though it'ss from the parent pres shell's root view.
nsIView *parentRootView;
parentPresShell->GetViewManager()->GetRootView(parentRootView);
sDontRetargetEvents = PR_TRUE;
nsresult rv = parentViewObserver->HandleEvent(parentRootView, aEvent, aEventStatus);
sDontRetargetEvents = PR_FALSE;
return rv;
}
NS_IMETHODIMP
PresShell::DisableNonTestMouseEvents(PRBool aDisable)
{
sDisableNonTestMouseEvents = aDisable;
return NS_OK;
}
NS_IMETHODIMP
PresShell::HandleEvent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
NS_ASSERTION(aView, "null view");
if (mIsDestroying || !nsContentUtils::IsSafeToRunScript() ||
(sDisableNonTestMouseEvents && NS_IS_MOUSE_EVENT(aEvent) &&
!(aEvent->flags & NS_EVENT_FLAG_SYNTETIC_TEST_EVENT))) {
return NS_OK;
}
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT) {
// Accessibility events come through OS requests and not from scripts,
// so it is safe to handle here
return HandleEventInternal(aEvent, aView, aEventStatus);
}
#endif
// key and IME events must be targeted at the presshell for the focused frame
if (!sDontRetargetEvents &&
(NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent) ||
NS_IS_QUERY_CONTENT_EVENT(aEvent) || NS_IS_SELECTION_EVENT(aEvent) ||
NS_IS_CONTEXT_MENU_KEY(aEvent))) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMWindow> window;
fm->GetFocusedWindow(getter_AddRefs(window));
// if there is no focused frame, there isn't anything to fire a key event
// at so just return
nsCOMPtr<nsPIDOMWindow> piWindow = do_QueryInterface(window);
if (!piWindow)
return NS_OK;
nsCOMPtr<nsIDocument> doc(do_QueryInterface(piWindow->GetExtantDocument()));
if (!doc)
return NS_OK;
nsIPresShell *presShell = doc->GetPrimaryShell();
if (!presShell)
return NS_OK;
if (presShell != this) {
nsCOMPtr<nsIViewObserver> viewObserver = do_QueryInterface(presShell);
if (!viewObserver)
return NS_ERROR_FAILURE;
nsIView *view;
presShell->GetViewManager()->GetRootView(view);
sDontRetargetEvents = PR_TRUE;
nsresult rv = viewObserver->HandleEvent(view, aEvent, aEventStatus);
sDontRetargetEvents = PR_FALSE;
return rv;
}
}
// Check for a theme change up front, since the frame type is irrelevant
if (aEvent->message == NS_THEMECHANGED && mPresContext) {
mPresContext->ThemeChanged();
return NS_OK;
}
// Check for a system color change up front, since the frame type is
// irrelevant
if ((aEvent->message == NS_SYSCOLORCHANGED) && mPresContext) {
nsIViewManager* vm = GetViewManager();
if (vm) {
// Only dispatch system color change when the message originates from
// from the root views widget. This is necessary to prevent us from
// dispatching the SysColorChanged notification for each child window
// which may be redundant.
nsIView *view;
vm->GetRootView(view);
if (view == aView) {
*aEventStatus = nsEventStatus_eConsumeDoDefault;
mPresContext->SysColorChanged();
return NS_OK;
}
}
return NS_OK;
}
if (mDocument && mDocument->EventHandlingSuppressed()) {
nsDelayedEvent* event = nsnull;
if (aEvent->eventStructType == NS_KEY_EVENT) {
if (aEvent->message == NS_KEY_DOWN) {
mNoDelayedKeyEvents = PR_TRUE;
} else if (!mNoDelayedKeyEvents) {
event = new nsDelayedKeyEvent(static_cast<nsKeyEvent*>(aEvent));
}
} else if (aEvent->eventStructType == NS_MOUSE_EVENT) {
if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
mNoDelayedMouseEvents = PR_TRUE;
} else if (!mNoDelayedMouseEvents && aEvent->message == NS_MOUSE_BUTTON_UP) {
event = new nsDelayedMouseEvent(static_cast<nsMouseEvent*>(aEvent));
}
}
if (event && !mDelayedEvents.AppendElement(event)) {
delete event;
}
return NS_OK;
}
nsIFrame* frame = static_cast<nsIFrame*>(aView->GetClientData());
PRBool dispatchUsingCoordinates =
!NS_IS_KEY_EVENT(aEvent) && !NS_IS_IME_EVENT(aEvent) &&
!NS_IS_CONTEXT_MENU_KEY(aEvent) && !NS_IS_FOCUS_EVENT(aEvent) &&
!NS_IS_PLUGIN_EVENT(aEvent);
// if this event has no frame, we need to retarget it at a parent
// view that has a frame.
if (!frame &&
(dispatchUsingCoordinates || NS_IS_KEY_EVENT(aEvent) ||
NS_IS_IME_EVENT(aEvent))) {
nsIView* targetView = aView;
while (targetView && !targetView->GetClientData()) {
targetView = targetView->GetParent();
}
if (targetView) {
aView = targetView;
frame = static_cast<nsIFrame*>(aView->GetClientData());
}
}
if (dispatchUsingCoordinates) {
NS_WARN_IF_FALSE(frame, "Nothing to handle this event!");
if (!frame)
return NS_OK;
nsPresContext* framePresContext = frame->PresContext();
nsPresContext* rootPresContext = framePresContext->RootPresContext();
NS_ASSERTION(rootPresContext == mPresContext->RootPresContext(),
"How did we end up outside the connected prescontext/viewmanager hierarchy?");
// If we aren't starting our event dispatch from the root frame of the root prescontext,
// then someone must be capturing the mouse. In that case we don't want to search the popup
// list.
if (framePresContext == rootPresContext &&
frame == FrameManager()->GetRootFrame()) {
#ifdef MOZ_XUL
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsTArray<nsIFrame*> popups = pm->GetVisiblePopups();
PRUint32 i;
// Search from top to bottom
for (i = 0; i < popups.Length(); i++) {
nsIFrame* popup = popups[i];
if (popup->GetOverflowRect().Contains(
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, popup))) {
// The event should target the popup
frame = popup;
break;
}
}
}
#endif
}
nsPoint eventPoint
= nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, frame);
nsIFrame* targetFrame;
{
nsAutoDisableGetUsedXAssertions disableAssert;
PRBool ignoreRootScrollFrame = PR_FALSE;
if (aEvent->eventStructType == NS_MOUSE_EVENT) {
ignoreRootScrollFrame = static_cast<nsMouseEvent*>(aEvent)->ignoreRootScrollFrame;
}
targetFrame = nsLayoutUtils::GetFrameForPoint(frame, eventPoint,
PR_FALSE, ignoreRootScrollFrame);
}
if (targetFrame) {
PresShell* shell =
static_cast<PresShell*>(targetFrame->PresContext()->PresShell());
if (shell != this) {
// Handle the event in the correct shell.
// Prevent deletion until we're done with event handling (bug 336582).
nsCOMPtr<nsIPresShell> kungFuDeathGrip(shell);
nsIView* subshellRootView;
shell->GetViewManager()->GetRootView(subshellRootView);
// We pass the subshell's root view as the view to start from. This is
// the only correct alternative; if the event was captured then it
// must have been captured by us or some ancestor shell and we
// now ask the subshell to dispatch it normally.
return shell->HandlePositionedEvent(subshellRootView, targetFrame,
aEvent, aEventStatus);
}
}
if (!targetFrame) {
targetFrame = frame;
}
return HandlePositionedEvent(aView, targetFrame, aEvent, aEventStatus);
}
nsresult rv = NS_OK;
if (frame) {
PushCurrentEventInfo(nsnull, nsnull);
// key and IME events go to the focused frame
if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent) ||
NS_IS_CONTEXT_MENU_KEY(aEvent) || NS_IS_PLUGIN_EVENT(aEvent)) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMElement> element;
fm->GetFocusedElement(getter_AddRefs(element));
mCurrentEventContent = do_QueryInterface(element);
// a key or IME event may come in to an inactive window. In this
// situation, look for the element that would be focused if this
// window was active.
if (!mCurrentEventContent &&
NS_TargetUnfocusedEventToLastFocusedContent(aEvent)) {
nsPIDOMWindow *win = mDocument->GetWindow();
nsCOMPtr<nsPIDOMWindow> focusedWindow;
mCurrentEventContent =
nsFocusManager::GetFocusedDescendant(win, PR_TRUE, getter_AddRefs(focusedWindow));
}
// otherwise, if there is no focused content or the focused content has
// no frame, just use the root content. This ensures that key events
// still get sent to the window properly if nothing is focused or if a
// frame goes away while it is focused.
if (!mCurrentEventContent || !GetCurrentEventFrame())
mCurrentEventContent = mDocument->GetRootContent();
mCurrentEventFrame = nsnull;
if (!mCurrentEventContent || InZombieDocument(mCurrentEventContent)) {
rv = RetargetEventToParent(aEvent, aEventStatus);
PopCurrentEventInfo();
return rv;
}
} else {
mCurrentEventFrame = frame;
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aView, aEventStatus);
}
#ifdef NS_DEBUG
ShowEventTargetDebug();
#endif
PopCurrentEventInfo();
} else {
// Focus events need to be dispatched even if no frame was found, since
// we don't want the focus to be out of sync.
if (!NS_EVENT_NEEDS_FRAME(aEvent)) {
mCurrentEventFrame = nsnull;
return HandleEventInternal(aEvent, aView, aEventStatus);
}
else if (NS_IS_KEY_EVENT(aEvent)) {
// Keypress events in new blank tabs should not be completely thrown away.
// Retarget them -- the parent chrome shell might make use of them.
return RetargetEventToParent(aEvent, aEventStatus);
}
}
return rv;
}
#ifdef NS_DEBUG
void
PresShell::ShowEventTargetDebug()
{
if (nsIFrameDebug::GetShowEventTargetFrameBorder() &&
GetCurrentEventFrame()) {
if (mDrawEventTargetFrame) {
mDrawEventTargetFrame->Invalidate(
nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize()));
}
mDrawEventTargetFrame = mCurrentEventFrame;
mDrawEventTargetFrame->Invalidate(
nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize()));
}
}
#endif
nsresult
PresShell::HandlePositionedEvent(nsIView* aView,
nsIFrame* aTargetFrame,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
nsresult rv = NS_OK;
PushCurrentEventInfo(nsnull, nsnull);
mCurrentEventFrame = aTargetFrame;
if (mCurrentEventFrame) {
nsCOMPtr<nsIContent> targetElement;
mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetElement));
// If there is no content for this frame, target it anyway. Some
// frames can be targeted but do not have content, particularly
// windows with scrolling off.
if (targetElement) {
// Bug 103055, bug 185889: mouse events apply to *elements*, not all
// nodes. Thus we get the nearest element parent here.
// XXX we leave the frame the same even if we find an element
// parent, so that the text frame will receive the event (selection
// and friends are the ones who care about that anyway)
//
// We use weak pointers because during this tight loop, the node
// will *not* go away. And this happens on every mousemove.
while (targetElement &&
!targetElement->IsNodeOfType(nsINode::eELEMENT)) {
targetElement = targetElement->GetParent();
}
// If we found an element, target it. Otherwise, target *nothing*.
if (!targetElement) {
mCurrentEventContent = nsnull;
mCurrentEventFrame = nsnull;
} else if (targetElement != mCurrentEventContent) {
mCurrentEventContent = targetElement;
}
}
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aView, aEventStatus);
}
#ifdef NS_DEBUG
ShowEventTargetDebug();
#endif
PopCurrentEventInfo();
return rv;
}
NS_IMETHODIMP
PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame,
nsIContent* aContent, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(aFrame, aContent);
ret = HandleEventInternal(aEvent, nsnull, aStatus);
PopCurrentEventInfo();
return NS_OK;
}
inline PRBool
IsSynthesizedMouseMove(nsEvent* aEvent)
{
return aEvent->eventStructType == NS_MOUSE_EVENT &&
static_cast<nsMouseEvent*>(aEvent)->reason != nsMouseEvent::eReal;
}
nsresult
PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView,
nsEventStatus* aStatus)
{
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT)
{
static_cast<nsAccessibleEvent*>(aEvent)->accessible = nsnull;
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container) {
// This presshell is not active. This often happens when a
// preshell is being held onto for fastback.
return NS_OK;
}
nsIAccessible* acc;
nsCOMPtr<nsIDOMNode> domNode(do_QueryInterface(mDocument));
NS_ASSERTION(domNode, "No dom node for doc");
accService->GetAccessibleInShell(domNode, this, &acc);
// Addref this - it's not a COM Ptr
// We'll make sure the right number of Addref's occur before
// handing this back to the accessibility client
static_cast<nsAccessibleEvent*>(aEvent)->accessible = acc;
// Ensure this is set in case a11y was activated before any
// nsPresShells existed to observe "a11y-init-or-shutdown" topic
gIsAccessibilityActive = PR_TRUE;
return NS_OK;
}
}
#endif
nsCOMPtr<nsIEventStateManager> manager = mPresContext->EventStateManager();
nsresult rv = NS_OK;
if (!NS_EVENT_NEEDS_FRAME(aEvent) || GetCurrentEventFrame()) {
PRBool isHandlingUserInput = PR_FALSE;
if (NS_IS_TRUSTED_EVENT(aEvent)) {
switch (aEvent->message) {
case NS_MOUSE_BUTTON_DOWN:
case NS_MOUSE_BUTTON_UP:
case NS_KEY_PRESS:
case NS_KEY_DOWN:
case NS_KEY_UP:
isHandlingUserInput = PR_TRUE;
}
}
if (aEvent->message == NS_CONTEXTMENU &&
static_cast<nsMouseEvent*>(aEvent)->context == nsMouseEvent::eContextMenuKey) {
if (!AdjustContextMenuKeyEvent(static_cast<nsMouseEvent*>(aEvent)))
return NS_OK;
}
nsAutoHandlingUserInputStatePusher userInpStatePusher(isHandlingUserInput);
nsAutoPopupStatePusher popupStatePusher(nsDOMEvent::GetEventPopupControlState(aEvent));
// FIXME. If the event was reused, we need to clear the old target,
// bug 329430
aEvent->target = nsnull;
nsWeakView weakView(aView);
// 1. Give event to event manager for pre event state changes and
// generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame,
aStatus, aView);
// 2. Give event to the DOM for third party and JS use.
if (GetCurrentEventFrame() && NS_SUCCEEDED(rv)) {
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (PreHandleEvent above), but not mousemove DOM events.
if (!IsSynthesizedMouseMove(aEvent)) {
nsPresShellEventCB eventCB(this);
if (mCurrentEventContent) {
nsEventDispatcher::Dispatch(mCurrentEventContent, mPresContext,
aEvent, nsnull, aStatus, &eventCB);
}
else {
nsCOMPtr<nsIContent> targetContent;
rv = mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetContent));
if (NS_SUCCEEDED(rv) && targetContent) {
nsEventDispatcher::Dispatch(targetContent, mPresContext, aEvent,
nsnull, aStatus, &eventCB);
} else if (mDocument) {
nsEventDispatcher::Dispatch(mDocument, mPresContext, aEvent,
nsnull, aStatus, nsnull);
}
}
}
// 3. Give event to event manager for post event state changes and
// generation of synthetic events.
if (!mIsDestroying && NS_SUCCEEDED(rv)) {
rv = manager->PostHandleEvent(mPresContext, aEvent,
GetCurrentEventFrame(), aStatus,
weakView.GetView());
}
}
}
return rv;
}
// Dispatch event to content only (NOT full processing)
// See also HandleEventWithTarget which does full event processing.
NS_IMETHODIMP
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent,
nsEventStatus* aStatus)
{
PushCurrentEventInfo(nsnull, aTargetContent);
// Bug 41013: Check if the event should be dispatched to content.
// It's possible that we are in the middle of destroying the window
// and the js context is out of date. This check detects the case
// that caused a crash in bug 41013, but there may be a better way
// to handle this situation!
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
// Dispatch event to content
nsEventDispatcher::Dispatch(aTargetContent, mPresContext, aEvent, nsnull,
aStatus);
}
PopCurrentEventInfo();
return NS_OK;
}
// See the method above.
NS_IMETHODIMP
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsIDOMEvent* aEvent,
nsEventStatus* aStatus)
{
PushCurrentEventInfo(nsnull, aTargetContent);
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
nsEventDispatcher::DispatchDOMEvent(aTargetContent, nsnull, aEvent,
mPresContext, aStatus);
}
PopCurrentEventInfo();
return NS_OK;
}
PRBool
PresShell::AdjustContextMenuKeyEvent(nsMouseEvent* aEvent)
{
#ifdef MOZ_XUL
// if a menu is open, open the context menu relative to the active item on the menu.
// XXXndeakin Mac doesn't fire mouse-triggered context menus while another
// menu is open. Maybe we should prevent keyboard-tiggered context menu events too.
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsIFrame* popupFrame = pm->GetTopPopup(ePopupTypeMenu);
if (popupFrame) {
#ifdef XP_MACOSX
// context menus should not be opened while another menu is open on Mac,
// so return false so that the event is not fired.
return PR_FALSE;
#else
nsIFrame* itemFrame =
(static_cast<nsMenuPopupFrame *>(popupFrame))->GetCurrentMenuItem();
if (!itemFrame)
itemFrame = popupFrame;
nsCOMPtr<nsIWidget> widget = popupFrame->GetWindow();
aEvent->widget = widget;
nsIntPoint widgetPoint = widget->WidgetToScreenOffset();
aEvent->refPoint = itemFrame->GetScreenRect().BottomLeft() - widgetPoint;
mCurrentEventContent = itemFrame->GetContent();
mCurrentEventFrame = itemFrame;
return PR_TRUE;
#endif
}
}
#endif
// If we're here because of the key-equiv for showing context menus, we
// have to twiddle with the NS event to make sure the context menu comes
// up in the upper left of the relevant content area before we create
// the DOM event. Since we never call InitMouseEvent() on the event,
// the client X/Y will be 0,0. We can make use of that if the widget is null.
// Use the root view manager's widget since it's most likely to have one,
// and the coordinates returned by GetCurrentItemAndPositionForElement
// are relative to the root of the root view manager.
mPresContext->RootPresContext()->PresShell()->GetViewManager()->
GetRootWidget(getter_AddRefs(aEvent->widget));
aEvent->refPoint.x = 0;
aEvent->refPoint.y = 0;
// see if we should use the caret position for the popup
nsIntPoint caretPoint;
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
if (PrepareToUseCaretPosition(aEvent->widget, caretPoint)) {
// caret position is good
aEvent->refPoint = caretPoint;
return PR_TRUE;
}
// If we're here because of the key-equiv for showing context menus, we
// have to reset the event target to the currently focused element. Get it
// from the focus controller.
nsCOMPtr<nsIDOMElement> currentFocus;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm)
fm->GetFocusedElement(getter_AddRefs(currentFocus));
// Reset event coordinates relative to focused frame in view
if (currentFocus) {
nsCOMPtr<nsIContent> currentPointElement;
GetCurrentItemAndPositionForElement(currentFocus,
getter_AddRefs(currentPointElement),
aEvent->refPoint);
if (currentPointElement) {
mCurrentEventContent = currentPointElement;
mCurrentEventFrame = nsnull;
GetCurrentEventFrame();
}
}
return PR_TRUE;
}
// nsEventListenerManager::PrepareToUseCaretPosition
//
// This checks to see if we should use the caret position for popup context
// menus. Returns true if the caret position should be used, and the
// coordinates of that position is returned in aTargetPt. This function
// will also scroll the window as needed to make the caret visible.
//
// The event widget should be the widget that generated the event, and
// whose coordinate system the resulting event's refPoint should be
// relative to. The returned point is in device pixels realtive to the
// widget passed in.
PRBool
PresShell::PrepareToUseCaretPosition(nsIWidget* aEventWidget, nsIntPoint& aTargetPt)
{
nsresult rv;
// check caret visibility
nsRefPtr<nsCaret> caret;
rv = GetCaret(getter_AddRefs(caret));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
NS_ENSURE_TRUE(caret, PR_FALSE);
PRBool caretVisible = PR_FALSE;
rv = caret->GetCaretVisible(&caretVisible);
if (NS_FAILED(rv) || ! caretVisible)
return PR_FALSE;
// caret selection, this is a temporary weak reference, so no refcounting is
// needed
nsISelection* domSelection = caret->GetCaretDOMSelection();
NS_ENSURE_TRUE(domSelection, PR_FALSE);
// since the match could be an anonymous textnode inside a
// <textarea> or text <input>, we need to get the outer frame
// note: frames are not refcounted
nsIFrame* frame = nsnull; // may be NULL
nsCOMPtr<nsIDOMNode> node;
rv = domSelection->GetFocusNode(getter_AddRefs(node));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
NS_ENSURE_TRUE(node, PR_FALSE);
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (content) {
nsIContent* nonNative = content->FindFirstNonNativeAnonymous();
content = nonNative;
}
if (content) {
// It seems like ScrollSelectionIntoView should be enough, but it's
// not. The problem is that scrolling the selection into view when it is
// below the current viewport will align the top line of the frame exactly
// with the bottom of the window. This is fine, BUT, the popup event causes
// the control to be re-focused which does this exact call to
// ScrollContentIntoView, which has a one-pixel disagreement of whether the
// frame is actually in view. The result is that the frame is aligned with
// the top of the window, but the menu is still at the bottom.
//
// Doing this call first forces the frame to be in view, eliminating the
// problem. The only difference in the result is that if your cursor is in
// an edit box below the current view, you'll get the edit box aligned with
// the top of the window. This is arguably better behavior anyway.
rv = ScrollContentIntoView(content, NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE,
NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
frame = GetPrimaryFrameFor(content);
NS_WARN_IF_FALSE(frame, "No frame for focused content?");
}
// Actually scroll the selection (ie caret) into view. Note that this must
// be synchronous since we will be checking the caret position on the screen.
//
// Be easy about errors, and just don't scroll in those cases. Better to have
// the correct menu at a weird place than the wrong menu.
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
nsCOMPtr<nsISelectionController> selCon;
if (frame)
frame->GetSelectionController(GetPresContext(), getter_AddRefs(selCon));
else
selCon = static_cast<nsISelectionController *>(this);
if (selCon) {
rv = selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
}
// get caret position relative to some view (normally the same as the
// event widget view, but this is not guaranteed)
PRBool isCollapsed;
nsIView* view;
nsRect caretCoords;
rv = caret->GetCaretCoordinates(nsCaret::eRenderingViewCoordinates,
domSelection, &caretCoords, &isCollapsed,
&view);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
// in case the view used for caret coordinates was something else, we need
// to bring those coordinates into the space of the widget view
nsIView* widgetView = nsIView::GetViewFor(aEventWidget);
NS_ENSURE_TRUE(widgetView, PR_FALSE);
nsPoint viewToWidget;
widgetView->GetNearestWidget(&viewToWidget);
nsPoint viewDelta = view->GetOffsetTo(widgetView) + viewToWidget;
// caret coordinates are in app units, convert to pixels
nsPresContext* presContext = GetPresContext();
aTargetPt.x = presContext->AppUnitsToDevPixels(viewDelta.x + caretCoords.x + caretCoords.width);
aTargetPt.y = presContext->AppUnitsToDevPixels(viewDelta.y + caretCoords.y + caretCoords.height);
return PR_TRUE;
}
void
PresShell::GetCurrentItemAndPositionForElement(nsIDOMElement *aCurrentEl,
nsIContent** aTargetToUse,
nsIntPoint& aTargetPt)
{
nsCOMPtr<nsIContent> focusedContent(do_QueryInterface(aCurrentEl));
ScrollContentIntoView(focusedContent, NS_PRESSHELL_SCROLL_ANYWHERE,
NS_PRESSHELL_SCROLL_ANYWHERE);
PRBool istree = PR_FALSE, checkLineHeight = PR_TRUE;
PRInt32 extraPixelsY = 0, extraTreeY = 0;
#ifdef MOZ_XUL
// Set the position to just underneath the current item for multi-select
// lists or just underneath the selected item for single-select lists. If
// the element is not a list, or there is no selection, leave the position
// as is.
nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
nsCOMPtr<nsIDOMXULMultiSelectControlElement> multiSelect =
do_QueryInterface(aCurrentEl);
if (multiSelect) {
checkLineHeight = PR_FALSE;
PRInt32 currentIndex;
multiSelect->GetCurrentIndex(&currentIndex);
if (currentIndex >= 0) {
nsCOMPtr<nsIDOMXULElement> xulElement(do_QueryInterface(aCurrentEl));
if (xulElement) {
nsCOMPtr<nsIBoxObject> box;
xulElement->GetBoxObject(getter_AddRefs(box));
nsCOMPtr<nsITreeBoxObject> treeBox(do_QueryInterface(box));
// Tree view special case (tree items have no frames)
// Get the focused row and add its coordinates, which are already in pixels
// XXX Boris, should we create a new interface so that this doesn't
// need to know about trees? Something like nsINodelessChildCreator which
// could provide the current focus coordinates?
if (treeBox) {
treeBox->EnsureRowIsVisible(currentIndex);
PRInt32 firstVisibleRow, rowHeight;
treeBox->GetFirstVisibleRow(&firstVisibleRow);
treeBox->GetRowHeight(&rowHeight);
extraPixelsY = (currentIndex - firstVisibleRow + 1) * rowHeight;
istree = PR_TRUE;
nsCOMPtr<nsITreeColumns> cols;
treeBox->GetColumns(getter_AddRefs(cols));
if (cols) {
nsCOMPtr<nsITreeColumn> col;
cols->GetFirstColumn(getter_AddRefs(col));
if (col) {
nsCOMPtr<nsIDOMElement> colElement;
col->GetElement(getter_AddRefs(colElement));
nsCOMPtr<nsIContent> colContent(do_QueryInterface(colElement));
if (colContent) {
nsIFrame* frame = GetPrimaryFrameFor(colContent);
if (frame) {
extraTreeY = frame->GetSize().height;
}
}
}
}
}
else {
multiSelect->GetCurrentItem(getter_AddRefs(item));
}
}
}
}
else {
// don't check menulists as the selected item will be inside a popup.
nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aCurrentEl);
if (!menulist) {
checkLineHeight = PR_FALSE;
nsCOMPtr<nsIDOMXULSelectControlElement> select =
do_QueryInterface(aCurrentEl);
if (select)
select->GetSelectedItem(getter_AddRefs(item));
}
}
if (item)
focusedContent = do_QueryInterface(item);
#endif
nsIFrame *frame = GetPrimaryFrameFor(focusedContent);
if (frame) {
nsPoint frameOrigin(0, 0);
// Get the frame's origin within its view
nsIView *view = frame->GetClosestView(&frameOrigin);
NS_ASSERTION(view, "No view for frame");
// View's origin within the view manager tree
frameOrigin += view->GetOffsetTo(nsnull);
// Start context menu down and to the right from top left of frame
// use the lineheight. This is a good distance to move the context
// menu away from the top left corner of the frame. If we always
// used the frame height, the context menu could end up far away,
// for example when we're focused on linked images.
// On the other hand, we want to use the frame height if it's less
// than the current line height, so that the context menu appears
// associated with the correct frame.
nscoord extra = 0;
if (!istree) {
extra = frame->GetSize().height;
if (checkLineHeight) {
nsIScrollableView *scrollView =
nsLayoutUtils::GetNearestScrollingView(view, nsLayoutUtils::eEither);
if (scrollView) {
nscoord scrollViewLineHeight;
scrollView->GetLineHeight(&scrollViewLineHeight);
if (extra > scrollViewLineHeight) {
extra = scrollViewLineHeight;
}
}
}
}
nsPresContext* presContext = GetPresContext();
aTargetPt.x = presContext->AppUnitsToDevPixels(frameOrigin.x);
aTargetPt.y = presContext->AppUnitsToDevPixels(
frameOrigin.y + extra + extraTreeY) + extraPixelsY;
}
NS_IF_ADDREF(*aTargetToUse = focusedContent);
}
NS_IMETHODIMP
PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight)
{
return ResizeReflow(aWidth, aHeight);
}
NS_IMETHODIMP_(PRBool)
PresShell::IsVisible()
{
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIBaseWindow> bw = do_QueryInterface(container);
if (!bw)
return PR_FALSE;
PRBool res = PR_TRUE;
bw->GetVisibility(&res);
return res;
}
NS_IMETHODIMP_(void)
PresShell::WillPaint()
{
// Don't bother reflowing if some viewmanager in our tree is painting while
// we still have painting suppressed.
if (mPaintingSuppressed) {
return;
}
// Process reflows, if we have them, to reduce flicker due to invalidates and
// reflow being interspersed. Note that we _do_ allow this to be
// interruptible; if we can't do all the reflows it's better to flicker a bit
// than to freeze up.
FlushPendingNotifications(Flush_InterruptibleLayout);
}
nsresult
PresShell::GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets)
{
aSheets.Clear();
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eAgentSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
nsIStyleSheet *sheet = mStyleSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (!aSheets.AppendObject(sheet))
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult
PresShell::SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets)
{
return mStyleSet->ReplaceSheets(nsStyleSet::eAgentSheet, aSheets);
}
nsresult
PresShell::AddOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->PrependStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
nsresult
PresShell::RemoveOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->RemoveStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
static void
FreezeElement(nsIContent *aContent, void *aShell)
{
#ifdef MOZ_MEDIA
nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aContent));
if (domMediaElem) {
nsHTMLMediaElement* mediaElem = static_cast<nsHTMLMediaElement*>(aContent);
mediaElem->Freeze();
return;
}
#endif
nsIPresShell* shell = static_cast<nsIPresShell*>(aShell);
nsIFrame *frame = shell->FrameManager()->GetPrimaryFrameFor(aContent, -1);
nsIObjectFrame *objectFrame = do_QueryFrame(frame);
if (objectFrame) {
objectFrame->StopPlugin();
}
}
static PRBool
FreezeSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetPrimaryShell();
if (shell)
shell->Freeze();
return PR_TRUE;
}
void
PresShell::Freeze()
{
mDocument->EnumerateFreezableElements(FreezeElement, this);
if (mCaret)
mCaret->SetCaretVisible(PR_FALSE);
mPaintingSuppressed = PR_TRUE;
if (mDocument)
mDocument->EnumerateSubDocuments(FreezeSubDocument, nsnull);
}
void
PresShell::FireOrClearDelayedEvents(PRBool aFireEvents)
{
mNoDelayedMouseEvents = PR_FALSE;
mNoDelayedKeyEvents = PR_FALSE;
if (!aFireEvents) {
mDelayedEvents.Clear();
return;
}
if (mDocument) {
nsCOMPtr<nsIDocument> doc = mDocument;
while (!mIsDestroying && mDelayedEvents.Length() &&
!doc->EventHandlingSuppressed()) {
nsAutoPtr<nsDelayedEvent> ev(mDelayedEvents[0].forget());
mDelayedEvents.RemoveElementAt(0);
ev->Dispatch(this);
}
if (!doc->EventHandlingSuppressed()) {
mDelayedEvents.Clear();
}
}
}
static void
ThawElement(nsIContent *aContent, void *aShell)
{
#ifdef MOZ_MEDIA
nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aContent));
if (domMediaElem) {
nsHTMLMediaElement* mediaElem = static_cast<nsHTMLMediaElement*>(aContent);
mediaElem->Thaw();
return;
}
#endif
nsCOMPtr<nsIObjectLoadingContent> objlc(do_QueryInterface(aContent));
if (objlc) {
nsCOMPtr<nsIPluginInstance> inst;
objlc->EnsureInstantiation(getter_AddRefs(inst));
}
}
static PRBool
ThawSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetPrimaryShell();
if (shell)
shell->Thaw();
return PR_TRUE;
}
void
PresShell::Thaw()
{
mDocument->EnumerateFreezableElements(ThawElement, this);
if (mDocument)
mDocument->EnumerateSubDocuments(ThawSubDocument, nsnull);
UnsuppressPainting();
}
//--------------------------------------------------------
// Start of protected and private methods on the PresShell
//--------------------------------------------------------
//-------------- Begin Reflow Event Definition ------------------------
NS_IMETHODIMP
PresShell::ReflowEvent::Run() {
// Take an owning reference to the PresShell during this call to ensure
// that it doesn't get killed off prematurely.
nsRefPtr<PresShell> ps = mPresShell;
if (ps) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", (void*)ps, (void*)this);
}
#endif
// NOTE: the ReflowEvent class is a friend of the PresShell class
ps->ClearReflowEventStatus();
// Set a kung fu death grip on the view manager associated with the pres shell
// before processing that pres shell's reflow commands. Fixes bug 54868.
nsCOMPtr<nsIViewManager> viewManager = ps->GetViewManager();
ps->mSuppressInterruptibleReflows = PR_FALSE;
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("*** Entering reflow event (time=%lld)\n", PR_Now());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
ps->FlushPendingNotifications(Flush_InterruptibleLayout);
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("*** Returning from reflow event (time=%lld)\n", PR_Now());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
// Now, explicitly release the pres shell before the view manager
ps = nsnull;
viewManager = nsnull;
}
return NS_OK;
}
//-------------- End Reflow Event Definition ---------------------------
void
PresShell::PostReflowEvent()
{
if (mReflowEvent.IsPending() || mIsDestroying || mIsReflowing ||
mDirtyRoots.Length() == 0)
return;
if (!mPresContext->HasPendingInterrupt() || !PostReflowEventOffTimer()) {
DoPostReflowEvent();
}
}
void
PresShell::DoPostReflowEvent()
{
nsRefPtr<ReflowEvent> ev = new ReflowEvent(this);
if (NS_FAILED(NS_DispatchToCurrentThread(ev))) {
NS_WARNING("failed to dispatch reflow event");
} else {
mReflowEvent = ev;
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** PresShell::DoPostReflowEvent(), this=%p, event=%p\n",
(void*)this, (void*)ev);
}
#endif
}
}
nsresult
PresShell::DidCauseReflow()
{
NS_ASSERTION(mChangeNestCount != 0, "Unexpected call to DidCauseReflow()");
--mChangeNestCount;
nsContentUtils::RemoveScriptBlocker();
return NS_OK;
}
void
PresShell::WillDoReflow()
{
// We just reflowed, tell the caret that its frame might have moved.
// XXXbz that comment makes no sense
if (mCaret) {
mCaret->InvalidateOutsideCaret();
mCaret->UpdateCaretPosition();
}
mPresContext->FlushUserFontSet();
mFrameConstructor->BeginUpdate();
}
void
PresShell::DidDoReflow(PRBool aInterruptible)
{
mFrameConstructor->EndUpdate();
HandlePostedReflowCallbacks(aInterruptible);
// Null-check mViewManager in case this happens during Destroy. See
// bugs 244435 and 238546.
if (!mPaintingSuppressed && mViewManager)
mViewManager->SynthesizeMouseMove(PR_FALSE);
if (mCaret) {
// Update the caret's position now to account for any changes created by
// the reflow.
mCaret->InvalidateOutsideCaret();
mCaret->UpdateCaretPosition();
}
}
static PLDHashOperator
MarkFramesDirtyToRoot(nsPtrHashKey<nsIFrame>* p, void* closure)
{
nsIFrame* target = static_cast<nsIFrame*>(closure);
for (nsIFrame* f = p->GetKey(); f && !NS_SUBTREE_DIRTY(f);
f = f->GetParent()) {
f->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
if (f == target) {
break;
}
}
return PL_DHASH_NEXT;
}
void
PresShell::sReflowContinueCallback(nsITimer* aTimer, void* aPresShell)
{
nsRefPtr<PresShell> self = static_cast<PresShell*>(aPresShell);
NS_PRECONDITION(aTimer == self->mReflowContinueTimer, "Unexpected timer");
self->mReflowContinueTimer = nsnull;
self->DoPostReflowEvent();
}
PRBool
PresShell::PostReflowEventOffTimer()
{
NS_PRECONDITION(!mReflowEvent.IsPending(), "Shouldn't get here");
if (!mReflowContinueTimer) {
mReflowContinueTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mReflowContinueTimer ||
NS_FAILED(mReflowContinueTimer->
InitWithFuncCallback(sReflowContinueCallback, this, 0,
nsITimer::TYPE_ONE_SHOT))) {
return PR_FALSE;
}
}
return PR_TRUE;
}
PRBool
PresShell::DoReflow(nsIFrame* target, PRBool aInterruptible)
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
nsCOMPtr<nsIRenderingContext> rcx;
// Always create the rendering context relative to the root frame during
// reflow; otherwise, it crashes on the mac (I'm not quite sure why)
nsresult rv = CreateRenderingContext(rootFrame, getter_AddRefs(rcx));
if (NS_FAILED(rv)) {
NS_NOTREACHED("CreateRenderingContext failure");
return PR_FALSE;
}
#ifdef DEBUG
mCurrentReflowRoot = target;
#endif
target->WillReflow(mPresContext);
// If the target frame is the root of the frame hierarchy, then
// use all the available space. If it's simply a `reflow root',
// then use the target frame's size as the available space.
nsSize size;
if (target == rootFrame)
size = mPresContext->GetVisibleArea().Size();
else
size = target->GetSize();
NS_ASSERTION(!target->GetNextInFlow() && !target->GetPrevInFlow(),
"reflow roots should never split");
// Don't pass size directly to the reflow state, since a
// constrained height implies page/column breaking.
nsSize reflowSize(size.width, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState reflowState(mPresContext, target, rcx, reflowSize);
// fix the computed height
NS_ASSERTION(reflowState.mComputedMargin == nsMargin(0, 0, 0, 0),
"reflow state should not set margin for reflow roots");
if (size.height != NS_UNCONSTRAINEDSIZE) {
nscoord computedHeight =
size.height - reflowState.mComputedBorderPadding.TopBottom();
computedHeight = PR_MAX(computedHeight, 0);
reflowState.SetComputedHeight(computedHeight);
}
NS_ASSERTION(reflowState.ComputedWidth() ==
size.width -
reflowState.mComputedBorderPadding.LeftRight(),
"reflow state computed incorrect width");
mPresContext->ReflowStarted(aInterruptible);
mIsReflowing = PR_TRUE;
nsReflowStatus status;
nsHTMLReflowMetrics desiredSize;
target->Reflow(mPresContext, desiredSize, reflowState, status);
// If an incremental reflow is initiated at a frame other than the
// root frame, then its desired size had better not change! If it's
// initiated at the root, then the size better not change unless its
// height was unconstrained to start with.
NS_ASSERTION((target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) ||
(desiredSize.width == size.width &&
desiredSize.height == size.height),
"non-root frame's desired size changed during an "
"incremental reflow");
NS_ASSERTION(desiredSize.mOverflowArea ==
nsRect(nsPoint(0, 0),
nsSize(desiredSize.width, desiredSize.height)),
"reflow roots must not have visible overflow");
NS_ASSERTION(status == NS_FRAME_COMPLETE,
"reflow roots should never split");
target->SetSize(nsSize(desiredSize.width, desiredSize.height));
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, target,
target->GetView(),
&desiredSize.mOverflowArea);
target->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
if (target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) {
mPresContext->SetVisibleArea(nsRect(0, 0, desiredSize.width,
desiredSize.height));
}
#ifdef DEBUG
mCurrentReflowRoot = nsnull;
#endif
NS_ASSERTION(mPresContext->HasPendingInterrupt() ||
mFramesToDirty.Count() == 0,
"Why do we need to dirty anything if not interrupted?");
mIsReflowing = PR_FALSE;
PRBool interrupted = mPresContext->HasPendingInterrupt();
if (interrupted) {
// Make sure target gets reflowed again.
mFramesToDirty.EnumerateEntries(&MarkFramesDirtyToRoot, target);
NS_ASSERTION(NS_SUBTREE_DIRTY(target), "Why is the target not dirty?");
mDirtyRoots.AppendElement(target);
// Clear mFramesToDirty after we've done the NS_SUBTREE_DIRTY(target)
// assertion so that if it fails it's easier to see what's going on.
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("mFramesToDirty.Count() == %u\n", mFramesToDirty.Count());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
mFramesToDirty.Clear();
// Any FlushPendingNotifications with interruptible reflows
// should be suppressed now. We don't want to do extra reflow work
// before our reflow event happens.
mSuppressInterruptibleReflows = PR_TRUE;
PostReflowEvent();
}
mPresContext->RootPresContext()->UpdatePluginGeometry(target);
return !interrupted;
}
#ifdef DEBUG
void
PresShell::DoVerifyReflow()
{
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE);
FlushPendingNotifications(Flush_Layout);
mInVerifyReflow = PR_TRUE;
PRBool ok = VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: finished (%s)\n",
ok ? "ok" : "failed");
}
if (0 != mDirtyRoots.Length()) {
printf("XXX yikes! reflow commands queued during verify-reflow\n");
}
}
}
#endif
PRBool
PresShell::ProcessReflowCommands(PRBool aInterruptible)
{
MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_START(mReflowWatch);
PRBool interrupted = PR_FALSE;
if (0 != mDirtyRoots.Length()) {
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("ProcessReflowCommands: begin incremental reflow\n");
}
#endif
// If reflow is interruptible, then make a note of our deadline.
const PRIntervalTime deadline = aInterruptible
? PR_IntervalNow() + PR_MicrosecondsToInterval(gMaxRCProcessingTime)
: (PRIntervalTime)0;
// Scope for the reflow entry point
{
nsAutoScriptBlocker scriptBlocker;
WillDoReflow();
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow);
do {
// Send an incremental reflow notification to the target frame.
PRInt32 idx = mDirtyRoots.Length() - 1;
nsIFrame *target = mDirtyRoots[idx];
mDirtyRoots.RemoveElementAt(idx);
if (!NS_SUBTREE_DIRTY(target)) {
// It's not dirty anymore, which probably means the notification
// was posted in the middle of a reflow (perhaps with a reflow
// root in the middle). Don't do anything.
continue;
}
interrupted = !DoReflow(target, aInterruptible);
// Keep going until we're out of reflow commands, or we've run
// past our deadline, or we're interrupted.
} while (!interrupted && mDirtyRoots.Length() &&
(!aInterruptible || PR_IntervalNow() < deadline));
interrupted = mDirtyRoots.Length() != 0;
}
// Exiting the scriptblocker might have killed us
if (!mIsDestroying) {
DidDoReflow(aInterruptible);
}
// DidDoReflow might have killed us
if (!mIsDestroying) {
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n",
(void*)this);
}
DoVerifyReflow();
#endif
// If any new reflow commands were enqueued during the reflow, schedule
// another reflow event to process them. Note that we want to do this
// after DidDoReflow(), since that method can change whether there are
// dirty roots around by flushing, and there's no point in posting a
// reflow event just to have the flush revoke it.
if (mDirtyRoots.Length())
PostReflowEvent();
}
}
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
if (!mIsDestroying && mShouldUnsuppressPainting &&
mDirtyRoots.Length() == 0) {
// We only unlock if we're out of reflows. It's pointless
// to unlock if reflows are still pending, since reflows
// are just going to thrash the frames around some more. By
// waiting we avoid an overeager "jitter" effect.
mShouldUnsuppressPainting = PR_FALSE;
UnsuppressAndInvalidate();
}
return !interrupted;
}
void
PresShell::ClearReflowEventStatus()
{
mReflowEvent.Forget();
}
#ifdef MOZ_XUL
/*
* It's better to add stuff to the |DidSetStyleContext| method of the
* relevant frames than adding it here. These methods should (ideally,
* anyway) go away.
*/
// Return value says whether to walk children.
typedef PRBool (* frameWalkerFn)(nsIFrame *aFrame, void *aClosure);
static PRBool
ReResolveMenusAndTrees(nsIFrame *aFrame, void *aClosure)
{
// Trees have a special style cache that needs to be flushed when
// the theme changes.
nsTreeBodyFrame *treeBody = do_QueryFrame(aFrame);
if (treeBody)
treeBody->ClearStyleAndImageCaches();
// We deliberately don't re-resolve style on a menu's popup
// sub-content, since doing so slows menus to a crawl. That means we
// have to special-case them on a skin switch, and ensure that the
// popup frames just get destroyed completely.
if (aFrame && aFrame->GetType() == nsGkAtoms::menuFrame)
(static_cast<nsMenuFrame *>(aFrame))->CloseMenu(PR_TRUE);
return PR_TRUE;
}
static PRBool
ReframeImageBoxes(nsIFrame *aFrame, void *aClosure)
{
nsStyleChangeList *list = static_cast<nsStyleChangeList*>(aClosure);
if (aFrame->GetType() == nsGkAtoms::imageBoxFrame) {
list->AppendChange(aFrame, aFrame->GetContent(),
NS_STYLE_HINT_FRAMECHANGE);
return PR_FALSE; // don't walk descendants
}
return PR_TRUE; // walk descendants
}
static void
WalkFramesThroughPlaceholders(nsPresContext *aPresContext, nsIFrame *aFrame,
frameWalkerFn aFunc, void *aClosure)
{
PRBool walkChildren = (*aFunc)(aFrame, aClosure);
if (!walkChildren)
return;
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
do {
nsIFrame *child = aFrame->GetFirstChild(childList);
while (child) {
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow, and recur through the
// out-of-flows of placeholders.
WalkFramesThroughPlaceholders(aPresContext,
nsPlaceholderFrame::GetRealFrameFor(child),
aFunc, aClosure);
}
child = child->GetNextSibling();
}
childList = aFrame->GetAdditionalChildListName(listIndex++);
} while (childList);
}
#endif
NS_IMETHODIMP
PresShell::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
#ifdef MOZ_XUL
if (!nsCRT::strcmp(aTopic, "chrome-flush-skin-caches")) {
nsIFrame *rootFrame = FrameManager()->GetRootFrame();
// Need to null-check because "chrome-flush-skin-caches" can happen
// at interesting times during startup.
if (rootFrame) {
NS_ASSERTION(mViewManager, "View manager must exist");
nsIViewManager::UpdateViewBatch batch(mViewManager);
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
&ReResolveMenusAndTrees, nsnull);
// Because "chrome:" URL equality is messy, reframe image box
// frames (hack!).
nsStyleChangeList changeList;
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
ReframeImageBoxes, &changeList);
// Mark ourselves as not safe to flush while we're doing frame
// construction.
{
nsAutoScriptBlocker scriptBlocker;
++mChangeNestCount;
mFrameConstructor->ProcessRestyledFrames(changeList);
--mChangeNestCount;
}
batch.EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(nsnull);
#endif
}
return NS_OK;
}
#endif
if (!nsCRT::strcmp(aTopic, NS_LINK_VISITED_EVENT_TOPIC)) {
nsCOMPtr<nsIURI> uri = do_QueryInterface(aSubject);
if (uri && mDocument) {
mDocument->NotifyURIVisitednessChanged(uri);
}
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "agent-sheet-added") && mStyleSet) {
AddAgentSheet(aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "user-sheet-added") && mStyleSet) {
AddUserSheet(aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "agent-sheet-removed") && mStyleSet) {
RemoveSheet(nsStyleSet::eAgentSheet, aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "user-sheet-removed") && mStyleSet) {
RemoveSheet(nsStyleSet::eUserSheet, aSubject);
return NS_OK;
}
#ifdef ACCESSIBILITY
if (!nsCRT::strcmp(aTopic, "a11y-init-or-shutdown")) {
gIsAccessibilityActive = aData && *aData == '1';
}
#endif
NS_WARNING("unrecognized topic in PresShell::Observe");
return NS_ERROR_FAILURE;
}
void
PresShell::EnumeratePlugins(nsIDOMDocument *aDocument,
const nsString &aPluginTag,
nsPluginEnumCallback aCallback)
{
nsCOMPtr<nsIDOMNodeList> nodes;
aDocument->GetElementsByTagName(aPluginTag, getter_AddRefs(nodes));
if (!nodes)
return;
PRUint32 length;
nodes->GetLength(&length);
for (PRUint32 i = 0; i < length; ++i) {
nsCOMPtr<nsIDOMNode> node;
nodes->Item(i, getter_AddRefs(node));
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
if (content)
aCallback(this, content);
}
}
//------------------------------------------------------
// End of protected and private methods on the PresShell
//------------------------------------------------------
// Start of DEBUG only code
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIDeviceContext.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
nsIFrameDebug *frameDebug = do_QueryFrame(k1);
if (frameDebug) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k1);
printf(" != ");
if (nsnull != k2) {
nsIFrameDebug *frameDebug = do_QueryFrame(k2);
if (frameDebug) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k2);
printf(" %s", aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsRect& r1, const nsRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
nsIFrameDebug *frameDebug = do_QueryFrame(k1);
if (frameDebug) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k1);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != \n");
frameDebug = do_QueryFrame(k2);
if (frameDebug) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k2);
}
printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsIntRect& r1, const nsIntRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
nsIFrameDebug *frameDebug = do_QueryFrame(k1);
if (frameDebug) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k1);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != \n");
frameDebug = do_QueryFrame(k2);
if (frameDebug) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k2);
}
printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static PRBool
CompareTrees(nsPresContext* aFirstPresContext, nsIFrame* aFirstFrame,
nsPresContext* aSecondPresContext, nsIFrame* aSecondFrame)
{
if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame)
return PR_TRUE;
// XXX Evil hack to reduce false positives; I can't seem to figure
// out how to flush scrollbar changes correctly
//if (aFirstFrame->GetType() == nsGkAtoms::scrollbarFrame)
// return PR_TRUE;
PRBool ok = PR_TRUE;
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* k1 = aFirstFrame->GetFirstChild(listName);
nsIFrame* k2 = aSecondFrame->GetFirstChild(listName);
PRInt32 l1 = nsContainerFrame::LengthOf(k1);
PRInt32 l2 = nsContainerFrame::LengthOf(k2);
if (l1 != l2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
nsIntRect r1, r2;
nsIView* v1, *v2;
for (;;) {
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child lists are different\n");
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
if (k1->GetRect() != k2->GetRect()) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "(frame rects)", k1->GetRect(), k2->GetRect());
}
// Make sure either both have views or neither have views; if they
// do have views, make sure the views are the same size. If the
// views have widgets, make sure they both do or neither does. If
// they do, make sure the widgets are the same size.
v1 = k1->GetView();
v2 = k2->GetView();
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child views are not matched\n");
}
else if (nsnull != v1) {
if (v1->GetBounds() != v2->GetBounds()) {
LogVerifyMessage(k1, k2, "(view rects)", v1->GetBounds(), v2->GetBounds());
}
nsIWidget* w1 = v1->GetWidget();
nsIWidget* w2 = v2->GetWidget();
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
}
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
// XXX Should perhaps compare their float managers.
// Compare the sub-trees too
if (!CompareTrees(aFirstPresContext, k1, aSecondPresContext, k2)) {
ok = PR_FALSE;
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
// Advance to next sibling
k1 = k1->GetNextSibling();
k2 = k2->GetNextSibling();
}
else {
break;
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
nsIAtom* listName1 = aFirstFrame->GetAdditionalChildListName(listIndex);
nsIAtom* listName2 = aSecondFrame->GetAdditionalChildListName(listIndex);
listIndex++;
if (listName1 != listName2) {
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
ok = PR_FALSE;
}
LogVerifyMessage(k1, k2, "child list names are not matched: ");
nsAutoString tmp;
if (nsnull != listName1) {
listName1->ToString(tmp);
fputs(NS_LossyConvertUTF16toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf(" != ");
if (nsnull != listName2) {
listName2->ToString(tmp);
fputs(NS_LossyConvertUTF16toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf("\n");
break;
}
listName = listName1;
} while (ok && (listName != nsnull));
return ok;
}
#endif
#if 0
static nsIFrame*
FindTopFrame(nsIFrame* aRoot)
{
if (aRoot) {
nsIContent* content = aRoot->GetContent();
if (content) {
nsIAtom* tag;
content->GetTag(tag);
if (nsnull != tag) {
NS_RELEASE(tag);
return aRoot;
}
}
// Try one of the children
nsIFrame* kid = aRoot->GetFirstChild(nsnull);
while (nsnull != kid) {
nsIFrame* result = FindTopFrame(kid);
if (nsnull != result) {
return result;
}
kid = kid->GetNextSibling();
}
}
return nsnull;
}
#endif
#ifdef DEBUG
nsresult
PresShell::CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult)
{
nsStyleSet *clone = new nsStyleSet();
if (!clone) {
return NS_ERROR_OUT_OF_MEMORY;
}
PRInt32 i, n = aSet->SheetCount(nsStyleSet::eOverrideSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eOverrideSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eOverrideSheet, ss);
}
// The document expects to insert document stylesheets itself
#if 0
n = aSet->SheetCount(nsStyleSet::eDocSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eDocSheet, i);
if (ss)
clone->AddDocStyleSheet(ss, mDocument);
}
#endif
n = aSet->SheetCount(nsStyleSet::eUserSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eUserSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eUserSheet, ss);
}
n = aSet->SheetCount(nsStyleSet::eAgentSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eAgentSheet, ss);
}
*aResult = clone;
return NS_OK;
}
#ifdef DEBUG_Eli
static nsresult
DumpToPNG(nsIPresShell* shell, nsAString& name) {
PRInt32 width=1000, height=1000;
nsRect r(0, 0, shell->GetPresContext()->DevPixelsToAppUnits(width),
shell->GetPresContext()->DevPixelsToAppUnits(height));
nsRefPtr<gfxImageSurface> imgSurface =
new gfxImageSurface(gfxIntSize(width, height),
gfxImageSurface::ImageFormatARGB32);
NS_ENSURE_TRUE(imgSurface, NS_ERROR_OUT_OF_MEMORY);
nsRefPtr<gfxContext> imgContext = new gfxContext(imgSurface);
nsRefPtr<gfxASurface> surface =
gfxPlatform::GetPlatform()->
CreateOffscreenSurface(gfxIntSize(width, height),
gfxASurface::ImageFormatARGB32);
NS_ENSURE_TRUE(surface, NS_ERROR_OUT_OF_MEMORY);
nsRefPtr<gfxContext> context = new gfxContext(surface);
NS_ENSURE_TRUE(context, NS_ERROR_OUT_OF_MEMORY);
nsresult rv = shell->RenderDocument(r, 0, NS_RGB(255, 255, 0), context);
NS_ENSURE_SUCCESS(rv, rv);
imgContext->DrawSurface(surface, gfxSize(width, height));
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance("@mozilla.org/image/encoder;2?type=image/png");
NS_ENSURE_TRUE(encoder, NS_ERROR_FAILURE);
encoder->InitFromData(imgSurface->Data(), imgSurface->Stride() * height,
width, height, imgSurface->Stride(),
imgIEncoder::INPUT_FORMAT_HOSTARGB, EmptyString());
// XXX not sure if this is the right way to write to a file
nsCOMPtr<nsILocalFile> file = do_CreateInstance("@mozilla.org/file/local;1");
NS_ENSURE_TRUE(file, NS_ERROR_FAILURE);
rv = file->InitWithPath(name);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 length;
encoder->Available(&length);
nsCOMPtr<nsIOutputStream> outputStream;
rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), file);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIOutputStream> bufferedOutputStream;
rv = NS_NewBufferedOutputStream(getter_AddRefs(bufferedOutputStream),
outputStream, length);
PRUint32 numWritten;
rv = bufferedOutputStream->WriteFrom(encoder, length, &numWritten);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
#endif
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
PRBool
PresShell::VerifyIncrementalReflow()
{
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Building Verification Tree...\n");
}
// Create a presentation context to view the new frame tree
nsCOMPtr<nsPresContext> cx =
new nsRootPresContext(mDocument, mPresContext->IsPaginated() ?
nsPresContext::eContext_PrintPreview :
nsPresContext::eContext_Galley);
NS_ENSURE_TRUE(cx, PR_FALSE);
nsIDeviceContext *dc = mPresContext->DeviceContext();
nsresult rv = cx->Init(dc);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
// Get our scrolling preference
nsIView* rootView;
mViewManager->GetRootView(rootView);
NS_ENSURE_TRUE(rootView->HasWidget(), PR_FALSE);
void* nativeParentWidget = rootView->GetWidget()->GetNativeData(NS_NATIVE_WIDGET);
// Create a new view manager.
nsCOMPtr<nsIViewManager> vm = do_CreateInstance(kViewManagerCID);
NS_ENSURE_TRUE(vm, PR_FALSE);
rv = vm->Init(dc);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds = mPresContext->GetVisibleArea();
nsIView* view = vm->CreateView(tbounds, nsnull);
NS_ENSURE_TRUE(view, PR_FALSE);
//now create the widget for the view
rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget, PR_TRUE);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
// Make the new presentation context the same size as our
// presentation context.
nsRect r = mPresContext->GetVisibleArea();
cx->SetVisibleArea(r);
// Create a new presentation shell to view the document. Use the
// exact same style information that this document has.
nsAutoPtr<nsStyleSet> newSet;
rv = CloneStyleSet(mStyleSet, getter_Transfers(newSet));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
nsCOMPtr<nsIPresShell> sh;
rv = mDocument->CreateShell(cx, vm, newSet, getter_AddRefs(sh));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
newSet.forget();
// Note that after we create the shell, we must make sure to destroy it
sh->SetVerifyReflowEnable(PR_FALSE); // turn off verify reflow while we're reflowing the test frame tree
vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh.get()));
{
nsAutoCauseReflowNotifier crNotifier(this);
sh->InitialReflow(r.width, r.height);
}
mDocument->BindingManager()->ProcessAttachedQueue();
sh->FlushPendingNotifications(Flush_Layout);
sh->SetVerifyReflowEnable(PR_TRUE); // turn on verify reflow again now that we're done reflowing the test frame tree
// Force the non-primary presshell to unsuppress; it doesn't want to normally
// because it thinks it's hidden
((PresShell*)sh.get())->mPaintingSuppressed = PR_FALSE;
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Verification Tree built, comparing...\n");
}
// Now that the document has been reflowed, use its frame tree to
// compare against our frame tree.
nsIFrame* root1 = FrameManager()->GetRootFrame();
nsIFrame* root2 = sh->FrameManager()->GetRootFrame();
PRBool ok = CompareTrees(mPresContext, root1, cx, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
nsIFrameDebug* frameDebug = do_QueryFrame(root1);
if (frameDebug) {
frameDebug->List(stdout, 0);
}
printf("Verification tree:\n");
frameDebug = do_QueryFrame(root2);
if (frameDebug) {
frameDebug->List(stdout, 0);
}
}
#ifdef DEBUG_Eli
// Sample code for dumping page to png
// XXX Needs to be made more flexible
if (!ok) {
nsString stra;
static int num = 0;
stra.AppendLiteral("C:\\mozilla\\mozilla\\debug\\filea");
stra.AppendInt(num);
stra.AppendLiteral(".png");
DumpToPNG(sh, stra);
nsString strb;
strb.AppendLiteral("C:\\mozilla\\mozilla\\debug\\fileb");
strb.AppendInt(num);
strb.AppendLiteral(".png");
DumpToPNG(this, strb);
++num;
}
#endif
sh->EndObservingDocument();
sh->Destroy();
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Finished Verifying Reflow...\n");
}
return ok;
}
// Layout debugging hooks
void
PresShell::ListStyleContexts(nsIFrame *aRootFrame, FILE *out, PRInt32 aIndent)
{
nsStyleContext *sc = aRootFrame->GetStyleContext();
if (sc)
sc->List(out, aIndent);
}
void
PresShell::ListStyleSheets(FILE *out, PRInt32 aIndent)
{
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eDocSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
mStyleSet->StyleSheetAt(nsStyleSet::eDocSheet, i)->List(out, aIndent);
fputs("\n", out);
}
}
void
PresShell::VerifyStyleTree()
{
VERIFY_STYLE_TREE;
}
#endif
//=============================================================
//=============================================================
//-- Debug Reflow Counts
//=============================================================
//=============================================================
#ifdef MOZ_REFLOW_PERF
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::DumpReflows()
{
if (mReflowCountMgr) {
nsCAutoString uriStr;
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
uri->GetPath(uriStr);
}
}
mReflowCountMgr->DisplayTotals(uriStr.get());
mReflowCountMgr->DisplayHTMLTotals(uriStr.get());
mReflowCountMgr->DisplayDiffsInTotals("Differences");
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::CountReflows(const char * aName, nsIFrame * aFrame)
{
if (mReflowCountMgr) {
mReflowCountMgr->Add(aName, aFrame);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor)
{
if (mReflowCountMgr) {
mReflowCountMgr->PaintCount(aName, aRenderingContext, aPresContext, aFrame, aColor);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::SetPaintFrameCount(PRBool aPaintFrameCounts)
{
if (mReflowCountMgr) {
mReflowCountMgr->SetPaintFrameCounts(aPaintFrameCounts);
}
return NS_OK;
}
PRBool
PresShell::IsPaintingFrameCounts()
{
if (mReflowCountMgr)
return mReflowCountMgr->IsPaintingFrameCounts();
return PR_FALSE;
}
//------------------------------------------------------------------
//-- Reflow Counter Classes Impls
//------------------------------------------------------------------
//------------------------------------------------------------------
ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) :
mMgr(aMgr)
{
ClearTotals();
SetTotalsCache();
}
//------------------------------------------------------------------
ReflowCounter::~ReflowCounter()
{
}
//------------------------------------------------------------------
void ReflowCounter::ClearTotals()
{
mTotal = 0;
}
//------------------------------------------------------------------
void ReflowCounter::SetTotalsCache()
{
mCacheTotal = mTotal;
}
//------------------------------------------------------------------
void ReflowCounter::CalcDiffInTotals()
{
mCacheTotal = mTotal - mCacheTotal;
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(const char * aStr)
{
DisplayTotals(mTotal, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayDiffTotals(const char * aStr)
{
DisplayTotals(mCacheTotal, aStr?aStr:"Diff Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(const char * aStr)
{
DisplayHTMLTotals(mTotal, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(PRUint32 aTotal, const char * aTitle)
{
// figure total
if (aTotal == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
printf("%25s\t", aTitle);
printf("%d\t", aTotal);
if (gTots != this && aTotal > 0) {
gTots->Add(aTotal);
}
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle)
{
if (aTotal == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
FILE * fd = mMgr->GetOutFile();
if (!fd) {
return;
}
fprintf(fd, "<tr><td><center>%s</center></td>", aTitle);
fprintf(fd, "<td><center>%d</center></td></tr>\n", aTotal);
if (gTots != this && aTotal > 0) {
gTots->Add(aTotal);
}
}
//------------------------------------------------------------------
//-- ReflowCountMgr
//------------------------------------------------------------------
ReflowCountMgr::ReflowCountMgr()
{
mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mIndiFrameCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mCycledOnce = PR_FALSE;
mDumpFrameCounts = PR_FALSE;
mDumpFrameByFrameCounts = PR_FALSE;
mPaintFrameByFrameCounts = PR_FALSE;
}
//------------------------------------------------------------------
ReflowCountMgr::~ReflowCountMgr()
{
CleanUp();
}
//------------------------------------------------------------------
ReflowCounter * ReflowCountMgr::LookUp(const char * aName)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
return counter;
}
return nsnull;
}
//------------------------------------------------------------------
void ReflowCountMgr::Add(const char * aName, nsIFrame * aFrame)
{
NS_ASSERTION(aName != nsnull, "Name shouldn't be null!");
if (mDumpFrameCounts && nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
if (counter == nsnull) {
counter = new ReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
char * name = NS_strdup(aName);
NS_ASSERTION(name != nsnull, "null ptr");
PL_HashTableAdd(mCounts, name, counter);
}
counter->Add();
}
if ((mDumpFrameByFrameCounts || mPaintFrameByFrameCounts) &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter == nsnull) {
counter = new IndiReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
counter->mFrame = aFrame;
counter->mName.AssignASCII(aName);
PL_HashTableAdd(mIndiFrameCounts, key, counter);
}
// this eliminates extra counts from super classes
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
counter->mCount++;
counter->mCounter.Add(1);
}
}
}
//------------------------------------------------------------------
void ReflowCountMgr::PaintCount(const char * aName,
nsIRenderingContext* aRenderingContext,
nsPresContext* aPresContext,
nsIFrame* aFrame,
PRUint32 aColor)
{
if (mPaintFrameByFrameCounts &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
aRenderingContext->PushState();
nsFont font("Times", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0,
nsPresContext::CSSPixelsToAppUnits(11));
nsCOMPtr<nsIFontMetrics> fm = aPresContext->GetMetricsFor(font);
aRenderingContext->SetFont(fm);
char buf[16];
sprintf(buf, "%d", counter->mCount);
nscoord x = 0, y;
nscoord width, height;
aRenderingContext->SetTextRunRTL(PR_FALSE);
aRenderingContext->GetWidth((char*)buf, width);
fm->GetHeight(height);
fm->GetMaxAscent(y);
PRUint32 color;
PRUint32 color2;
if (aColor != 0) {
color = aColor;
color2 = NS_RGB(0,0,0);
} else {
PRUint8 rc = 0, gc = 0, bc = 0;
if (counter->mCount < 5) {
rc = 255;
gc = 255;
} else if ( counter->mCount < 11) {
gc = 255;
} else {
rc = 255;
}
color = NS_RGB(rc,gc,bc);
color2 = NS_RGB(rc/2,gc/2,bc/2);
}
nsRect rect(0,0, width+15, height+15);
aRenderingContext->SetColor(NS_RGB(0,0,0));
aRenderingContext->FillRect(rect);
aRenderingContext->SetColor(color2);
aRenderingContext->DrawString(buf, strlen(buf), x+15,y+15);
aRenderingContext->SetColor(color);
aRenderingContext->DrawString(buf, strlen(buf), x,y);
aRenderingContext->PopState();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
delete counter;
NS_Free(str);
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
delete counter;
NS_Free(str);
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
void ReflowCountMgr::CleanUp()
{
if (nsnull != mCounts) {
PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull);
PL_HashTableDestroy(mCounts);
mCounts = nsnull;
}
if (nsnull != mIndiFrameCounts) {
PL_HashTableEnumerateEntries(mIndiFrameCounts, RemoveIndiItems, nsnull);
PL_HashTableDestroy(mIndiFrameCounts);
mIndiFrameCounts = nsnull;
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
printf("\t\t\t\tTotal\n");
for (PRUint32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this);
}
}
static void RecurseIndiTotals(nsPresContext* aPresContext,
PLHashTable * aHT,
nsIFrame * aParentFrame,
PRInt32 aLevel)
{
if (aParentFrame == nsnull) {
return;
}
char key[16];
sprintf(key, "%p", (void*)aParentFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(aHT, key);
if (counter) {
counter->mHasBeenOutput = PR_TRUE;
char * name = ToNewCString(counter->mName);
for (PRInt32 i=0;i<aLevel;i++) printf(" ");
printf("%s - %p [%d][", name, (void*)aParentFrame, counter->mCount);
printf("%d", counter->mCounter.GetTotal());
printf("]\n");
nsMemory::Free(name);
}
nsIFrame* child = aParentFrame->GetFirstChild(nsnull);
while (child) {
RecurseIndiTotals(aPresContext, aHT, child, aLevel+1);
child = child->GetNextSibling();
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg)
{
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
if (counter && !counter->mHasBeenOutput) {
char * name = ToNewCString(counter->mName);
printf("%s - %p [%d][", name, (void*)counter->mFrame, counter->mCount);
printf("%d", counter->mCounter.GetTotal());
printf("]\n");
nsMemory::Free(name);
}
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoIndiTotalsTree()
{
if (nsnull != mCounts) {
printf("\n------------------------------------------------\n");
printf("-- Individual Frame Counts\n");
printf("------------------------------------------------\n");
if (mPresShell) {
nsIFrame * rootFrame = mPresShell->FrameManager()->GetRootFrame();
RecurseIndiTotals(mPresContext, mIndiFrameCounts, rootFrame, 0);
printf("------------------------------------------------\n");
printf("-- Individual Counts of Frames not in Root Tree\n");
printf("------------------------------------------------\n");
PL_HashTableEnumerateEntries(mIndiFrameCounts, DoSingleIndi, this);
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayHTMLTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandHTMLTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Class", "Reflows"};
fprintf(mFD, "<tr>");
for (PRUint32 i=0; i < NS_ARRAY_LENGTH(title); i++) {
fprintf(mFD, "<td><center><b>%s<b></center></td>", title[i]);
}
fprintf(mFD, "</tr>\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this);
}
}
//------------------------------------
void ReflowCountMgr::DisplayTotals(const char * aStr)
{
#ifdef DEBUG_rods
printf("%s\n", aStr?aStr:"No name");
#endif
if (mDumpFrameCounts) {
DoGrandTotals();
}
if (mDumpFrameByFrameCounts) {
DoIndiTotalsTree();
}
}
//------------------------------------
void ReflowCountMgr::DisplayHTMLTotals(const char * aStr)
{
#ifdef WIN32x // XXX NOT XP!
char name[1024];
char * sptr = strrchr(aStr, '/');
if (sptr) {
sptr++;
strcpy(name, sptr);
char * eptr = strrchr(name, '.');
if (eptr) {
*eptr = 0;
}
strcat(name, "_stats.html");
}
mFD = fopen(name, "w");
if (mFD) {
fprintf(mFD, "<html><head><title>Reflow Stats</title></head><body>\n");
const char * title = aStr?aStr:"No name";
fprintf(mFD, "<center><b>%s</b><br><table border=1 style=\"background-color:#e0e0e0\">", title);
DoGrandHTMLTotals();
fprintf(mFD, "</center></table>\n");
fprintf(mFD, "</body></html>\n");
fclose(mFD);
mFD = nsnull;
}
#endif // not XP!
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg)
{
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->ClearTotals();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearTotals()
{
PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this);
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
gTots->SetTotalsCache();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg)
{
PRBool cycledOnce = (arg != 0);
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
if (cycledOnce) {
counter->CalcDiffInTotals();
counter->DisplayDiffTotals(str);
}
counter->SetTotalsCache();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr)
{
if (mCycledOnce) {
printf("Differences\n");
for (PRInt32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
ClearGrandTotals();
}
PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce);
mCycledOnce = PR_TRUE;
}
#endif // MOZ_REFLOW_PERF
// make a color string like #RRGGBB
void ColorToString(nscolor aColor, nsAutoString &aString)
{
char buf[8];
PR_snprintf(buf, sizeof(buf), "#%02x%02x%02x",
NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor));
CopyASCIItoUTF16(buf, aString);
}
nsIFrame* nsIPresShell::GetAbsoluteContainingBlock(nsIFrame *aFrame)
{
return FrameConstructor()->GetAbsoluteContainingBlock(aFrame);
}
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