forked from mirrors/gecko-dev
397 lines
14 KiB
C++
397 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsHTMLContainerFrame.h"
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#include "nsIRenderingContext.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsCSSRendering.h"
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#include "nsIContent.h"
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#include "nsHTMLAtoms.h"
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#include "nsIWidget.h"
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#include "nsILinkHandler.h"
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#include "nsHTMLValue.h"
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#include "nsGUIEvent.h"
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#include "nsIDocument.h"
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#include "nsIURL.h"
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#include "nsIPtr.h"
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#include "nsPlaceholderFrame.h"
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#include "nsIHTMLContent.h"
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#include "nsHTMLParts.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsViewsCID.h"
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#include "nsIReflowCommand.h"
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#include "nsHTMLIIDs.h"
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#include "nsDOMEvent.h"
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#include "nsIScrollableView.h"
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#include "nsWidgetsCID.h"
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#include "nsIStyleSet.h"
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static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
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static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID);
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NS_IMETHODIMP
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nsHTMLContainerFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
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const nsStyleDisplay* disp = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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if (disp->mVisible && mRect.width && mRect.height) {
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// Paint our background and border
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PRIntn skipSides = GetSkipSides();
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const nsStyleColor* color = (const nsStyleColor*)
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mStyleContext->GetStyleData(eStyleStruct_Color);
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const nsStyleSpacing* spacing = (const nsStyleSpacing*)
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mStyleContext->GetStyleData(eStyleStruct_Spacing);
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nsRect rect(0, 0, mRect.width, mRect.height);
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nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *color, *spacing, 0, 0);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *spacing, mStyleContext, skipSides);
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}
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}
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// Now paint the kids. Note that child elements have the opportunity to
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// override the visibility property and display even if their parent is
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// hidden
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PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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return NS_OK;
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}
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/**
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* Create a next-in-flow for aFrame. Will return the newly created
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* frame in aNextInFlowResult <b>if and only if</b> a new frame is
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* created; otherwise nsnull is returned in aNextInFlowResult.
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*/
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nsresult
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nsHTMLContainerFrame::CreateNextInFlow(nsIPresContext& aPresContext,
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nsIFrame* aOuterFrame,
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nsIFrame* aFrame,
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nsIFrame*& aNextInFlowResult)
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{
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aNextInFlowResult = nsnull;
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nsIFrame* nextInFlow;
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aFrame->GetNextInFlow(&nextInFlow);
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if (nsnull == nextInFlow) {
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// Create a continuation frame for the child frame and insert it
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// into our lines child list.
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nsIFrame* nextFrame;
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aFrame->GetNextSibling(&nextFrame);
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nsIPresShell* presShell;
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nsIStyleSet* styleSet;
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aPresContext.GetShell(&presShell);
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presShell->GetStyleSet(&styleSet);
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NS_RELEASE(presShell);
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styleSet->CreateContinuingFrame(&aPresContext, aFrame, aOuterFrame, &nextInFlow);
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NS_RELEASE(styleSet);
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if (nsnull == nextInFlow) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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aFrame->SetNextSibling(nextInFlow);
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nextInFlow->SetNextSibling(nextFrame);
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NS_FRAME_LOG(NS_FRAME_TRACE_NEW_FRAMES,
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("nsHTMLContainerFrame::MaybeCreateNextInFlow: frame=%p nextInFlow=%p",
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aFrame, nextInFlow));
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aNextInFlowResult = nextInFlow;
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}
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return NS_OK;
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}
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static nsresult
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ReparentFrameViewTo(nsIFrame* aFrame,
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nsIView* aNewParentView,
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nsIView* aOldParentView)
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{
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nsIView* view;
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// Does aFrame have a view?
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aFrame->GetView(&view);
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if (view) {
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nsIViewManager* viewManager;
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#ifdef NS_DEBUG
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// Verify that the current parent view is what we think it is
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nsIView* parentView;
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view->GetParent(parentView);
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NS_ASSERTION(parentView == aOldParentView, "unexpected parent view");
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#endif
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// Get the view manager
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aNewParentView->GetViewManager(viewManager);
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NS_ASSERTION(nsnull != viewManager, "null view manager");
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// Change the parent view.
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PRInt32 zIndex;
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view->GetZIndex(zIndex);
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viewManager->RemoveChild(aOldParentView, view);
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// XXX We need to insert this view in the correct place within its z-order...
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viewManager->InsertChild(aNewParentView, view, zIndex);
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NS_RELEASE(viewManager);
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} else {
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// Iterate the child frames, and check each child frame to see if it has
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// a view
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nsIFrame* childFrame;
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aFrame->FirstChild(nsnull, &childFrame);
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while (childFrame) {
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ReparentFrameViewTo(childFrame, aNewParentView, aOldParentView);
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childFrame->GetNextSibling(&childFrame);
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}
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}
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return NS_OK;
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}
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static nsIView*
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GetViewFor(nsIFrame* aFrame)
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{
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nsIView* view;
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aFrame->GetView(&view);
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if (!view) {
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nsPoint offset;
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aFrame->GetOffsetFromView(offset, &view);
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}
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NS_POSTCONDITION(view, "no containing view");
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return view;
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}
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nsresult
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nsHTMLContainerFrame::ReparentFrameView(nsIFrame* aChildFrame,
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nsIFrame* aOldParentFrame,
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nsIFrame* aNewParentFrame)
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{
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NS_PRECONDITION(aChildFrame, "null child frame pointer");
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NS_PRECONDITION(aOldParentFrame, "null old parent frame pointer");
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NS_PRECONDITION(aNewParentFrame, "null new parent frame pointer");
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NS_PRECONDITION(aOldParentFrame != aNewParentFrame, "same old and new parent frame");
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// First see if the old parent frame and the new parent frame are in the
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// same view sub-hierarchy
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nsIView* oldParentView = GetViewFor(aOldParentFrame);
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nsIView* newParentView = GetViewFor(aNewParentFrame);
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if (oldParentView != newParentView) {
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return ReparentFrameViewTo(aChildFrame, newParentView, oldParentView);
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}
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return NS_OK;
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}
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nsresult
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nsHTMLContainerFrame::CreateViewForFrame(nsIPresContext& aPresContext,
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nsIFrame* aFrame,
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nsIStyleContext* aStyleContext,
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PRBool aForce)
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{
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nsIView* view;
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aFrame->GetView(&view);
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// If we don't yet have a view, see if we need a view
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if (nsnull == view) {
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PRInt32 zIndex = 0;
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PRBool fixedBackgroundAttachment = PR_FALSE;
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// Get nsStyleColor and nsStyleDisplay
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const nsStyleColor* color = (const nsStyleColor*)
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aStyleContext->GetStyleData(eStyleStruct_Color);
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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aStyleContext->GetStyleData(eStyleStruct_Display);
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if (color->mOpacity != 1.0f) {
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::CreateViewForFrame: frame=%p opacity=%g",
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aFrame, color->mOpacity));
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aForce = PR_TRUE;
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}
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// See if the frame has a fixed background attachment
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if (NS_STYLE_BG_ATTACHMENT_FIXED == color->mBackgroundAttachment) {
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aForce = PR_TRUE;
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fixedBackgroundAttachment = PR_TRUE;
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}
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// See if the frame is being relatively positioned or absolutely
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// positioned
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if (!aForce) {
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const nsStylePosition* position = (const nsStylePosition*)
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aStyleContext->GetStyleData(eStyleStruct_Position);
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if (NS_STYLE_POSITION_RELATIVE == position->mPosition) {
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::CreateViewForFrame: frame=%p relatively positioned",
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aFrame));
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aForce = PR_TRUE;
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} else if (position->IsAbsolutelyPositioned()) {
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::CreateViewForFrame: frame=%p relatively positioned",
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aFrame));
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aForce = PR_TRUE;
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// Get the z-index to use. This only applies to positioned elements
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if (position->mZIndex.GetUnit() == eStyleUnit_Integer) {
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zIndex = position->mZIndex.GetIntValue();
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}
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// XXX CSS2 says clip applies to block-level and replaced elements with
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// overflow set to other than 'visible'. Where should this go?
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#if 0
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// Is there a clip rect specified?
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nsViewClip clip = {0, 0, 0, 0};
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PRUint8 clipType = (display->mClipFlags & NS_STYLE_CLIP_TYPE_MASK);
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nsViewClip* pClip = nsnull;
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if (NS_STYLE_CLIP_RECT == clipType) {
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if ((NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags) == 0) {
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clip.mLeft = display->mClip.left;
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}
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if ((NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags) == 0) {
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clip.mRight = display->mClip.right;
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}
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if ((NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags) == 0) {
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clip.mTop = display->mClip.top;
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}
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if ((NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags) == 0) {
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clip.mBottom = display->mClip.bottom;
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}
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pClip = &clip;
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}
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else if (NS_STYLE_CLIP_INHERIT == clipType) {
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// XXX need to handle clip inherit (get from parent style context)
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NS_NOTYETIMPLEMENTED("clip inherit");
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}
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#endif
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}
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}
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// See if the frame is a scrolled frame
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if (!aForce) {
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nsIAtom* pseudoTag;
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aStyleContext->GetPseudoType(pseudoTag);
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if (pseudoTag == nsHTMLAtoms::scrolledContentPseudo) {
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::CreateViewForFrame: scrolled frame=%p", aFrame));
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aForce = PR_TRUE;
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}
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NS_IF_RELEASE(pseudoTag);
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}
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if (aForce) {
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// Create a view
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nsIFrame* parent;
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nsIView* view;
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aFrame->GetParentWithView(&parent);
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NS_ASSERTION(parent, "GetParentWithView failed");
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nsIView* parentView;
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parent->GetView(&parentView);
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NS_ASSERTION(parentView, "no parent with view");
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// Create a view
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static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
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static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
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nsresult result = nsComponentManager::CreateInstance(kViewCID,
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nsnull,
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kIViewIID,
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(void **)&view);
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if (NS_OK == result) {
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nsIViewManager* viewManager;
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parentView->GetViewManager(viewManager);
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NS_ASSERTION(nsnull != viewManager, "null view manager");
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// Initialize the view
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nsRect bounds;
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aFrame->GetRect(bounds);
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view->Init(viewManager, bounds, parentView);
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// If the frame has a fixed background attachment, then indicate that the
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// view's contents should repainted and not bitblt'd
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if (fixedBackgroundAttachment) {
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PRUint32 viewFlags;
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view->GetViewFlags(&viewFlags);
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view->SetViewFlags(viewFlags | NS_VIEW_PUBLIC_FLAG_DONT_BITBLT);
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}
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// Insert the view into the view hierarchy. If the parent view is a
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// scrolling view we need to do this differently
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nsIScrollableView* scrollingView;
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if (NS_SUCCEEDED(parentView->QueryInterface(kScrollViewIID, (void**)&scrollingView))) {
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scrollingView->SetScrolledView(view);
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} else {
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viewManager->InsertChild(parentView, view, zIndex);
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}
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// If the background color is transparent or the visibility is hidden
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// then mark the view as having transparent content.
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// XXX We could try and be smarter about this and check whether there's
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// a background image. If there is a background image and the image is
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// fully opaque then we don't need to mark the view as having transparent
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// content...
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if ((NS_STYLE_BG_COLOR_TRANSPARENT & color->mBackgroundFlags) ||
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!display->mVisible) {
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viewManager->SetViewContentTransparency(view, PR_TRUE);
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}
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// XXX If it's relatively positioned or absolutely positioned then we
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// need to mark it as having transparent content, too. See bug #2502
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const nsStylePosition* position = (const nsStylePosition*)
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aStyleContext->GetStyleData(eStyleStruct_Position);
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// XXX Michael: uncomment this code to test the problem I described...
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if ((NS_STYLE_POSITION_RELATIVE == position->mPosition) ||
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(NS_STYLE_POSITION_ABSOLUTE == position->mPosition)) {
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viewManager->SetViewContentTransparency(view, PR_TRUE);
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}
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// XXX If it's fixed positioned, then create a widget so it floats
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// above the scrolling area
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if (NS_STYLE_POSITION_FIXED == position->mPosition) {
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view->CreateWidget(kCChildCID);
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}
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viewManager->SetViewOpacity(view, color->mOpacity);
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NS_RELEASE(viewManager);
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}
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// Remember our view
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aFrame->SetView(view);
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::CreateViewForFrame: frame=%p view=%p",
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aFrame));
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return result;
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}
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}
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return NS_OK;
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}
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