forked from mirrors/gecko-dev
2906 lines
104 KiB
C++
2906 lines
104 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mats Palmgren <mats.palmgren@bredband.net>
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* Takeshi Ichimaru <ayakawa.m@gmail.com>
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* Masayuki Nakano <masayuki@d-toybox.com>
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
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* Michael Ventnor <m.ventnor@gmail.com>
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* Rob Arnold <robarnold@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* utility functions for drawing borders and backgrounds */
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#include "nsStyleConsts.h"
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#include "nsPresContext.h"
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#include "nsIImage.h"
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#include "nsIFrame.h"
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#include "nsPoint.h"
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#include "nsRect.h"
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#include "nsIViewManager.h"
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#include "nsIPresShell.h"
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#include "nsFrameManager.h"
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#include "nsStyleContext.h"
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#include "nsGkAtoms.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsTransform2D.h"
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#include "nsIDeviceContext.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIScrollableFrame.h"
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#include "imgIRequest.h"
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#include "imgIContainer.h"
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#include "gfxIImageFrame.h"
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#include "nsCSSRendering.h"
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#include "nsCSSColorUtils.h"
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#include "nsITheme.h"
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#include "nsThemeConstants.h"
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#include "nsIServiceManager.h"
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#include "nsIHTMLDocument.h"
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#include "nsLayoutUtils.h"
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#include "nsINameSpaceManager.h"
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#include "nsBlockFrame.h"
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#include "gfxContext.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "gfxPlatform.h"
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#include "gfxImageSurface.h"
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#include "nsStyleStructInlines.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsCSSRenderingBorders.h"
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// To avoid storing this data on nsInlineFrame (bloat) and to avoid
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// recalculating this for each frame in a continuation (perf), hold
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// a cache of various coordinate information that we need in order
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// to paint inline backgrounds.
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struct InlineBackgroundData
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{
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InlineBackgroundData()
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: mFrame(nsnull), mBlockFrame(nsnull)
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{
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}
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~InlineBackgroundData()
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{
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}
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void Reset()
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{
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mBoundingBox.SetRect(0,0,0,0);
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mContinuationPoint = mLineContinuationPoint = mUnbrokenWidth = 0;
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mFrame = mBlockFrame = nsnull;
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}
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nsRect GetContinuousRect(nsIFrame* aFrame)
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{
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SetFrame(aFrame);
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nscoord x;
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if (mBidiEnabled) {
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x = mLineContinuationPoint;
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// Scan continuations on the same line as aFrame and accumulate the widths
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// of frames that are to the left (if this is an LTR block) or right
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// (if it's RTL) of the current one.
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PRBool isRtlBlock = (mBlockFrame->GetStyleVisibility()->mDirection ==
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NS_STYLE_DIRECTION_RTL);
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nscoord curOffset = aFrame->GetOffsetTo(mBlockFrame).x;
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// No need to use our GetPrevContinuation/GetNextContinuation methods
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// here, since ib special siblings are certainly not on the same line.
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nsIFrame* inlineFrame = aFrame->GetPrevContinuation();
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// If the continuation is fluid we know inlineFrame is not on the same line.
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// If it's not fluid, we need to test further to be sure.
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while (inlineFrame && !inlineFrame->GetNextInFlow() &&
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AreOnSameLine(aFrame, inlineFrame)) {
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nscoord frameXOffset = inlineFrame->GetOffsetTo(mBlockFrame).x;
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if(isRtlBlock == (frameXOffset >= curOffset)) {
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x += inlineFrame->GetSize().width;
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}
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inlineFrame = inlineFrame->GetPrevContinuation();
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}
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inlineFrame = aFrame->GetNextContinuation();
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while (inlineFrame && !inlineFrame->GetPrevInFlow() &&
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AreOnSameLine(aFrame, inlineFrame)) {
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nscoord frameXOffset = inlineFrame->GetOffsetTo(mBlockFrame).x;
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if(isRtlBlock == (frameXOffset >= curOffset)) {
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x += inlineFrame->GetSize().width;
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}
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inlineFrame = inlineFrame->GetNextContinuation();
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}
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if (isRtlBlock) {
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// aFrame itself is also to the right of its left edge, so add its width.
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x += aFrame->GetSize().width;
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// x is now the distance from the left edge of aFrame to the right edge
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// of the unbroken content. Change it to indicate the distance from the
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// left edge of the unbroken content to the left edge of aFrame.
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x = mUnbrokenWidth - x;
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}
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} else {
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x = mContinuationPoint;
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}
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// Assume background-origin: border and return a rect with offsets
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// relative to (0,0). If we have a different background-origin,
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// then our rect should be deflated appropriately by our caller.
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return nsRect(-x, 0, mUnbrokenWidth, mFrame->GetSize().height);
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}
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nsRect GetBoundingRect(nsIFrame* aFrame)
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{
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SetFrame(aFrame);
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// Move the offsets relative to (0,0) which puts the bounding box into
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// our coordinate system rather than our parent's. We do this by
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// moving it the back distance from us to the bounding box.
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// This also assumes background-origin: border, so our caller will
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// need to deflate us if needed.
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nsRect boundingBox(mBoundingBox);
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nsPoint point = mFrame->GetPosition();
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boundingBox.MoveBy(-point.x, -point.y);
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return boundingBox;
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}
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protected:
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nsIFrame* mFrame;
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nscoord mContinuationPoint;
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nscoord mUnbrokenWidth;
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nsRect mBoundingBox;
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PRBool mBidiEnabled;
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nsBlockFrame* mBlockFrame;
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nscoord mLineContinuationPoint;
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void SetFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "Need a frame");
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nsIFrame *prevContinuation = GetPrevContinuation(aFrame);
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if (!prevContinuation || mFrame != prevContinuation) {
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// Ok, we've got the wrong frame. We have to start from scratch.
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Reset();
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Init(aFrame);
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return;
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}
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// Get our last frame's size and add its width to our continuation
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// point before we cache the new frame.
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mContinuationPoint += mFrame->GetSize().width;
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// If this a new line, update mLineContinuationPoint.
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if (mBidiEnabled &&
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(aFrame->GetPrevInFlow() || !AreOnSameLine(mFrame, aFrame))) {
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mLineContinuationPoint = mContinuationPoint;
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}
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mFrame = aFrame;
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}
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nsIFrame* GetPrevContinuation(nsIFrame* aFrame)
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{
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nsIFrame* prevCont = aFrame->GetPrevContinuation();
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if (!prevCont && (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
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nsIFrame* block =
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static_cast<nsIFrame*>
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(aFrame->GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling));
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if (block) {
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// The {ib} properties are only stored on first continuations
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block = block->GetFirstContinuation();
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prevCont =
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static_cast<nsIFrame*>
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(block->GetProperty(nsGkAtoms::IBSplitSpecialPrevSibling));
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NS_ASSERTION(prevCont, "How did that happen?");
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}
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}
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return prevCont;
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}
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nsIFrame* GetNextContinuation(nsIFrame* aFrame)
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{
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nsIFrame* nextCont = aFrame->GetNextContinuation();
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if (!nextCont && (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
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// The {ib} properties are only stored on first continuations
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aFrame = aFrame->GetFirstContinuation();
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nsIFrame* block =
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static_cast<nsIFrame*>
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(aFrame->GetProperty(nsGkAtoms::IBSplitSpecialSibling));
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if (block) {
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nextCont =
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static_cast<nsIFrame*>
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(block->GetProperty(nsGkAtoms::IBSplitSpecialSibling));
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NS_ASSERTION(nextCont, "How did that happen?");
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}
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}
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return nextCont;
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}
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void Init(nsIFrame* aFrame)
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{
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// Start with the previous flow frame as our continuation point
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// is the total of the widths of the previous frames.
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nsIFrame* inlineFrame = GetPrevContinuation(aFrame);
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while (inlineFrame) {
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nsRect rect = inlineFrame->GetRect();
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mContinuationPoint += rect.width;
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mUnbrokenWidth += rect.width;
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mBoundingBox.UnionRect(mBoundingBox, rect);
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inlineFrame = GetPrevContinuation(inlineFrame);
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}
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// Next add this frame and subsequent frames to the bounding box and
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// unbroken width.
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inlineFrame = aFrame;
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while (inlineFrame) {
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nsRect rect = inlineFrame->GetRect();
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mUnbrokenWidth += rect.width;
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mBoundingBox.UnionRect(mBoundingBox, rect);
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inlineFrame = GetNextContinuation(inlineFrame);
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}
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mFrame = aFrame;
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mBidiEnabled = aFrame->PresContext()->BidiEnabled();
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if (mBidiEnabled) {
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// Find the containing block frame
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nsIFrame* frame = aFrame;
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do {
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frame = frame->GetParent();
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mBlockFrame = do_QueryFrame(frame);
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}
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while (frame && frame->IsFrameOfType(nsIFrame::eLineParticipant));
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NS_ASSERTION(mBlockFrame, "Cannot find containing block.");
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mLineContinuationPoint = mContinuationPoint;
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}
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}
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PRBool AreOnSameLine(nsIFrame* aFrame1, nsIFrame* aFrame2) {
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// Assumes that aFrame1 and aFrame2 are both decsendants of mBlockFrame.
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PRBool isValid1, isValid2;
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nsBlockInFlowLineIterator it1(mBlockFrame, aFrame1, &isValid1);
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nsBlockInFlowLineIterator it2(mBlockFrame, aFrame2, &isValid2);
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return isValid1 && isValid2 && it1.GetLine() == it2.GetLine();
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}
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};
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/* Local functions */
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static void PaintBackgroundLayer(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIFrame* aForFrame,
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const nsRect& aDirtyRect,
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const nsRect& aBorderArea,
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const nsRect& aBGClipRect,
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const nsStyleBackground& aBackground,
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const nsStyleBackground::Layer& aLayer,
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const nsStyleBorder& aBorder,
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PRBool aUsePrintSettings);
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static void DrawBorderImage(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIFrame* aForFrame,
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const nsRect& aBorderArea,
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const nsStyleBorder& aBorderStyle,
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const nsRect& aDirtyRect);
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static void DrawBorderImageComponent(nsIRenderingContext& aRenderingContext,
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nsIFrame* aForFrame,
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nsIImage* aImage,
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const nsRect& aDirtyRect,
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const nsRect& aFill,
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const nsIntRect& aSrc,
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PRUint8 aHFill,
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PRUint8 aVFill,
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const nsSize& aUnitSize);
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static nscolor MakeBevelColor(PRIntn whichSide, PRUint8 style,
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nscolor aBackgroundColor,
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nscolor aBorderColor);
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static InlineBackgroundData* gInlineBGData = nsnull;
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// Initialize any static variables used by nsCSSRendering.
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nsresult nsCSSRendering::Init()
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{
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NS_ASSERTION(!gInlineBGData, "Init called twice");
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gInlineBGData = new InlineBackgroundData();
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if (!gInlineBGData)
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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// Clean up any global variables used by nsCSSRendering.
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void nsCSSRendering::Shutdown()
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{
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delete gInlineBGData;
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gInlineBGData = nsnull;
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}
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/**
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* Make a bevel color
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*/
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static nscolor
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MakeBevelColor(PRIntn whichSide, PRUint8 style,
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nscolor aBackgroundColor, nscolor aBorderColor)
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{
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nscolor colors[2];
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nscolor theColor;
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// Given a background color and a border color
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// calculate the color used for the shading
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NS_GetSpecial3DColors(colors, aBackgroundColor, aBorderColor);
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if ((style == NS_STYLE_BORDER_STYLE_OUTSET) ||
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(style == NS_STYLE_BORDER_STYLE_RIDGE)) {
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// Flip colors for these two border styles
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switch (whichSide) {
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case NS_SIDE_BOTTOM: whichSide = NS_SIDE_TOP; break;
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case NS_SIDE_RIGHT: whichSide = NS_SIDE_LEFT; break;
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case NS_SIDE_TOP: whichSide = NS_SIDE_BOTTOM; break;
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case NS_SIDE_LEFT: whichSide = NS_SIDE_RIGHT; break;
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}
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}
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switch (whichSide) {
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case NS_SIDE_BOTTOM:
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theColor = colors[1];
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break;
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case NS_SIDE_RIGHT:
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theColor = colors[1];
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break;
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case NS_SIDE_TOP:
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theColor = colors[0];
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break;
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case NS_SIDE_LEFT:
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default:
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theColor = colors[0];
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break;
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}
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return theColor;
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}
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//----------------------------------------------------------------------
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// Thebes Border Rendering Code Start
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// helper function to convert a nsRect to a gfxRect
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static gfxRect
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RectToGfxRect(const nsRect& rect, nscoord twipsPerPixel)
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{
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return gfxRect(gfxFloat(rect.x) / twipsPerPixel,
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gfxFloat(rect.y) / twipsPerPixel,
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gfxFloat(rect.width) / twipsPerPixel,
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gfxFloat(rect.height) / twipsPerPixel);
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}
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/*
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* Compute the float-pixel radii that should be used for drawing
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* this border/outline, given the various input bits.
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*
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* If a side is skipped via skipSides, its corners are forced to 0.
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* All corner radii are then adjusted so they do not require more
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* space than outerRect, according to the algorithm in css3-background.
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*/
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static void
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ComputePixelRadii(const nscoord *aTwipsRadii,
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const nsRect& outerRect,
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PRIntn skipSides,
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nscoord twipsPerPixel,
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gfxCornerSizes *oBorderRadii)
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{
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nscoord twipsRadii[8];
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memcpy(twipsRadii, aTwipsRadii, sizeof twipsRadii);
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if (skipSides & SIDE_BIT_TOP) {
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twipsRadii[NS_CORNER_TOP_LEFT_X] = 0;
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twipsRadii[NS_CORNER_TOP_LEFT_Y] = 0;
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twipsRadii[NS_CORNER_TOP_RIGHT_X] = 0;
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twipsRadii[NS_CORNER_TOP_RIGHT_Y] = 0;
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}
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if (skipSides & SIDE_BIT_RIGHT) {
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twipsRadii[NS_CORNER_TOP_RIGHT_X] = 0;
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twipsRadii[NS_CORNER_TOP_RIGHT_Y] = 0;
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twipsRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0;
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twipsRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0;
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}
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if (skipSides & SIDE_BIT_BOTTOM) {
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twipsRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0;
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twipsRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0;
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twipsRadii[NS_CORNER_BOTTOM_LEFT_X] = 0;
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twipsRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0;
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}
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if (skipSides & SIDE_BIT_LEFT) {
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twipsRadii[NS_CORNER_BOTTOM_LEFT_X] = 0;
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twipsRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0;
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twipsRadii[NS_CORNER_TOP_LEFT_X] = 0;
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twipsRadii[NS_CORNER_TOP_LEFT_Y] = 0;
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}
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gfxFloat radii[8];
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NS_FOR_CSS_HALF_CORNERS(corner)
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radii[corner] = twipsRadii[corner] / twipsPerPixel;
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// css3-background specifies this algorithm for reducing
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// corner radii when they are too big.
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gfxFloat maxWidth = outerRect.width / twipsPerPixel;
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gfxFloat maxHeight = outerRect.height / twipsPerPixel;
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gfxFloat f = 1.0f;
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NS_FOR_CSS_SIDES(side) {
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PRUint32 hc1 = NS_SIDE_TO_HALF_CORNER(side, PR_FALSE, PR_TRUE);
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PRUint32 hc2 = NS_SIDE_TO_HALF_CORNER(side, PR_TRUE, PR_TRUE);
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gfxFloat length = NS_SIDE_IS_VERTICAL(side) ? maxHeight : maxWidth;
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gfxFloat sum = radii[hc1] + radii[hc2];
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// avoid floating point division in the normal case
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if (length < sum)
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f = PR_MIN(f, length/sum);
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}
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if (f < 1.0) {
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NS_FOR_CSS_HALF_CORNERS(corner) {
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radii[corner] *= f;
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}
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}
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|
|
(*oBorderRadii)[C_TL] = gfxSize(radii[NS_CORNER_TOP_LEFT_X],
|
|
radii[NS_CORNER_TOP_LEFT_Y]);
|
|
(*oBorderRadii)[C_TR] = gfxSize(radii[NS_CORNER_TOP_RIGHT_X],
|
|
radii[NS_CORNER_TOP_RIGHT_Y]);
|
|
(*oBorderRadii)[C_BR] = gfxSize(radii[NS_CORNER_BOTTOM_RIGHT_X],
|
|
radii[NS_CORNER_BOTTOM_RIGHT_Y]);
|
|
(*oBorderRadii)[C_BL] = gfxSize(radii[NS_CORNER_BOTTOM_LEFT_X],
|
|
radii[NS_CORNER_BOTTOM_LEFT_Y]);
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintBorder(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aDirtyRect,
|
|
const nsRect& aBorderArea,
|
|
const nsStyleBorder& aBorderStyle,
|
|
nsStyleContext* aStyleContext,
|
|
PRIntn aSkipSides)
|
|
{
|
|
nsMargin border;
|
|
nscoord twipsRadii[8];
|
|
nsCompatibility compatMode = aPresContext->CompatibilityMode();
|
|
|
|
SN("++ PaintBorder");
|
|
|
|
// Check to see if we have an appearance defined. If so, we let the theme
|
|
// renderer draw the border. DO not get the data from aForFrame, since the passed in style context
|
|
// may be different! Always use |aStyleContext|!
|
|
const nsStyleDisplay* displayData = aStyleContext->GetStyleDisplay();
|
|
if (displayData->mAppearance) {
|
|
nsITheme *theme = aPresContext->GetTheme();
|
|
if (theme && theme->ThemeSupportsWidget(aPresContext, aForFrame, displayData->mAppearance))
|
|
return; // Let the theme handle it.
|
|
}
|
|
|
|
if (aBorderStyle.IsBorderImageLoaded()) {
|
|
DrawBorderImage(aPresContext, aRenderingContext, aForFrame,
|
|
aBorderArea, aBorderStyle, aDirtyRect);
|
|
return;
|
|
}
|
|
|
|
// Get our style context's color struct.
|
|
const nsStyleColor* ourColor = aStyleContext->GetStyleColor();
|
|
|
|
// in NavQuirks mode we want to use the parent's context as a starting point
|
|
// for determining the background color
|
|
nsStyleContext* bgContext = nsCSSRendering::FindNonTransparentBackground
|
|
(aStyleContext, compatMode == eCompatibility_NavQuirks ? PR_TRUE : PR_FALSE);
|
|
const nsStyleBackground* bgColor = bgContext->GetStyleBackground();
|
|
|
|
border = aBorderStyle.GetComputedBorder();
|
|
if ((0 == border.left) && (0 == border.right) &&
|
|
(0 == border.top) && (0 == border.bottom)) {
|
|
// Empty border area
|
|
return;
|
|
}
|
|
|
|
GetBorderRadiusTwips(aBorderStyle.mBorderRadius, aForFrame->GetSize().width,
|
|
twipsRadii);
|
|
|
|
// Turn off rendering for all of the zero sized sides
|
|
if (aSkipSides & SIDE_BIT_TOP) border.top = 0;
|
|
if (aSkipSides & SIDE_BIT_RIGHT) border.right = 0;
|
|
if (aSkipSides & SIDE_BIT_BOTTOM) border.bottom = 0;
|
|
if (aSkipSides & SIDE_BIT_LEFT) border.left = 0;
|
|
|
|
// get the inside and outside parts of the border
|
|
nsRect outerRect(aBorderArea);
|
|
|
|
SF(" outerRect: %d %d %d %d\n", outerRect.x, outerRect.y, outerRect.width, outerRect.height);
|
|
|
|
// we can assume that we're already clipped to aDirtyRect -- I think? (!?)
|
|
|
|
// Get our conversion values
|
|
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
|
|
|
// convert outer and inner rects
|
|
gfxRect oRect(RectToGfxRect(outerRect, twipsPerPixel));
|
|
|
|
// convert the border widths
|
|
gfxFloat borderWidths[4] = { border.top / twipsPerPixel,
|
|
border.right / twipsPerPixel,
|
|
border.bottom / twipsPerPixel,
|
|
border.left / twipsPerPixel };
|
|
|
|
// convert the radii
|
|
gfxCornerSizes borderRadii;
|
|
ComputePixelRadii(twipsRadii, outerRect, aSkipSides, twipsPerPixel,
|
|
&borderRadii);
|
|
|
|
PRUint8 borderStyles[4];
|
|
nscolor borderColors[4];
|
|
nsBorderColors *compositeColors[4];
|
|
|
|
// pull out styles, colors, composite colors
|
|
NS_FOR_CSS_SIDES (i) {
|
|
PRBool foreground;
|
|
borderStyles[i] = aBorderStyle.GetBorderStyle(i);
|
|
aBorderStyle.GetBorderColor(i, borderColors[i], foreground);
|
|
aBorderStyle.GetCompositeColors(i, &compositeColors[i]);
|
|
|
|
if (foreground)
|
|
borderColors[i] = ourColor->mColor;
|
|
}
|
|
|
|
SF(" borderStyles: %d %d %d %d\n", borderStyles[0], borderStyles[1], borderStyles[2], borderStyles[3]);
|
|
|
|
// start drawing
|
|
gfxContext *ctx = aRenderingContext.ThebesContext();
|
|
|
|
ctx->Save();
|
|
|
|
#if 0
|
|
// this will draw a transparent red backround underneath the oRect area
|
|
ctx->Save();
|
|
ctx->Rectangle(oRect);
|
|
ctx->SetColor(gfxRGBA(1.0, 0.0, 0.0, 0.5));
|
|
ctx->Fill();
|
|
ctx->Restore();
|
|
#endif
|
|
|
|
//SF ("borderRadii: %f %f %f %f\n", borderRadii[0], borderRadii[1], borderRadii[2], borderRadii[3]);
|
|
|
|
nsCSSBorderRenderer br(twipsPerPixel,
|
|
ctx,
|
|
oRect,
|
|
borderStyles,
|
|
borderWidths,
|
|
borderRadii,
|
|
borderColors,
|
|
compositeColors,
|
|
aSkipSides,
|
|
bgColor->mBackgroundColor);
|
|
br.DrawBorders();
|
|
|
|
ctx->Restore();
|
|
|
|
SN();
|
|
}
|
|
|
|
static nsRect
|
|
GetOutlineInnerRect(nsIFrame* aFrame)
|
|
{
|
|
nsRect* savedOutlineInnerRect = static_cast<nsRect*>
|
|
(aFrame->GetProperty(nsGkAtoms::outlineInnerRectProperty));
|
|
if (savedOutlineInnerRect)
|
|
return *savedOutlineInnerRect;
|
|
return aFrame->GetOverflowRect();
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintOutline(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aDirtyRect,
|
|
const nsRect& aBorderArea,
|
|
const nsStyleBorder& aBorderStyle,
|
|
const nsStyleOutline& aOutlineStyle,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
nscoord twipsRadii[8];
|
|
|
|
// Get our style context's color struct.
|
|
const nsStyleColor* ourColor = aStyleContext->GetStyleColor();
|
|
|
|
nscoord width;
|
|
aOutlineStyle.GetOutlineWidth(width);
|
|
|
|
if (width == 0) {
|
|
// Empty outline
|
|
return;
|
|
}
|
|
|
|
nsStyleContext* bgContext = nsCSSRendering::FindNonTransparentBackground
|
|
(aStyleContext, PR_FALSE);
|
|
const nsStyleBackground* bgColor = bgContext->GetStyleBackground();
|
|
|
|
// get the radius for our outline
|
|
GetBorderRadiusTwips(aOutlineStyle.mOutlineRadius, aBorderArea.width,
|
|
twipsRadii);
|
|
|
|
// When the outline property is set on :-moz-anonymous-block or
|
|
// :-moz-anonyomus-positioned-block pseudo-elements, it inherited that
|
|
// outline from the inline that was broken because it contained a
|
|
// block. In that case, we don't want a really wide outline if the
|
|
// block inside the inline is narrow, so union the actual contents of
|
|
// the anonymous blocks.
|
|
nsIFrame *frameForArea = aForFrame;
|
|
do {
|
|
nsIAtom *pseudoType = frameForArea->GetStyleContext()->GetPseudoType();
|
|
if (pseudoType != nsCSSAnonBoxes::mozAnonymousBlock &&
|
|
pseudoType != nsCSSAnonBoxes::mozAnonymousPositionedBlock)
|
|
break;
|
|
// If we're done, we really want it and all its later siblings.
|
|
frameForArea = frameForArea->GetFirstChild(nsnull);
|
|
NS_ASSERTION(frameForArea, "anonymous block with no children?");
|
|
} while (frameForArea);
|
|
nsRect innerRect; // relative to aBorderArea.TopLeft()
|
|
if (frameForArea == aForFrame) {
|
|
innerRect = GetOutlineInnerRect(aForFrame);
|
|
} else {
|
|
for (; frameForArea; frameForArea = frameForArea->GetNextSibling()) {
|
|
// The outline has already been included in aForFrame's overflow
|
|
// area, but not in those of its descendants, so we have to
|
|
// include it. Otherwise we'll end up drawing the outline inside
|
|
// the border.
|
|
nsRect r(GetOutlineInnerRect(frameForArea) +
|
|
frameForArea->GetOffsetTo(aForFrame));
|
|
innerRect.UnionRect(innerRect, r);
|
|
}
|
|
}
|
|
|
|
innerRect += aBorderArea.TopLeft();
|
|
nscoord offset = aOutlineStyle.mOutlineOffset;
|
|
innerRect.Inflate(offset, offset);
|
|
// If the dirty rect is completely inside the border area (e.g., only the
|
|
// content is being painted), then we can skip out now
|
|
// XXX this isn't exactly true for rounded borders, where the inside curves may
|
|
// encroach into the content area. A safer calculation would be to
|
|
// shorten insideRect by the radius one each side before performing this test.
|
|
if (innerRect.Contains(aDirtyRect))
|
|
return;
|
|
|
|
nsRect outerRect = innerRect;
|
|
outerRect.Inflate(width, width);
|
|
|
|
// Get our conversion values
|
|
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
|
|
|
// get the outer rectangles
|
|
gfxRect oRect(RectToGfxRect(outerRect, twipsPerPixel));
|
|
|
|
// convert the radii
|
|
nsMargin outlineMargin(width, width, width, width);
|
|
gfxCornerSizes outlineRadii;
|
|
ComputePixelRadii(twipsRadii, outerRect, 0, twipsPerPixel,
|
|
&outlineRadii);
|
|
|
|
PRUint8 outlineStyle = aOutlineStyle.GetOutlineStyle();
|
|
PRUint8 outlineStyles[4] = { outlineStyle,
|
|
outlineStyle,
|
|
outlineStyle,
|
|
outlineStyle };
|
|
|
|
nscolor outlineColor;
|
|
// PR_FALSE means use the initial color; PR_TRUE means a color was
|
|
// set.
|
|
if (!aOutlineStyle.GetOutlineColor(outlineColor))
|
|
outlineColor = ourColor->mColor;
|
|
nscolor outlineColors[4] = { outlineColor,
|
|
outlineColor,
|
|
outlineColor,
|
|
outlineColor };
|
|
|
|
// convert the border widths
|
|
gfxFloat outlineWidths[4] = { width / twipsPerPixel,
|
|
width / twipsPerPixel,
|
|
width / twipsPerPixel,
|
|
width / twipsPerPixel };
|
|
|
|
// start drawing
|
|
gfxContext *ctx = aRenderingContext.ThebesContext();
|
|
|
|
ctx->Save();
|
|
|
|
nsCSSBorderRenderer br(twipsPerPixel,
|
|
ctx,
|
|
oRect,
|
|
outlineStyles,
|
|
outlineWidths,
|
|
outlineRadii,
|
|
outlineColors,
|
|
nsnull, 0,
|
|
bgColor->mBackgroundColor);
|
|
br.DrawBorders();
|
|
|
|
ctx->Restore();
|
|
|
|
SN();
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintFocus(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aFocusRect,
|
|
nscolor aColor)
|
|
{
|
|
nscoord oneCSSPixel = nsPresContext::CSSPixelsToAppUnits(1);
|
|
nscoord oneDevPixel = aPresContext->DevPixelsToAppUnits(1);
|
|
|
|
gfxRect focusRect(RectToGfxRect(aFocusRect, oneDevPixel));
|
|
|
|
gfxCornerSizes focusRadii;
|
|
{
|
|
nscoord twipsRadii[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
|
|
ComputePixelRadii(twipsRadii, aFocusRect, 0, oneDevPixel, &focusRadii);
|
|
}
|
|
gfxFloat focusWidths[4] = { oneCSSPixel / oneDevPixel,
|
|
oneCSSPixel / oneDevPixel,
|
|
oneCSSPixel / oneDevPixel,
|
|
oneCSSPixel / oneDevPixel };
|
|
|
|
PRUint8 focusStyles[4] = { NS_STYLE_BORDER_STYLE_DOTTED,
|
|
NS_STYLE_BORDER_STYLE_DOTTED,
|
|
NS_STYLE_BORDER_STYLE_DOTTED,
|
|
NS_STYLE_BORDER_STYLE_DOTTED };
|
|
nscolor focusColors[4] = { aColor, aColor, aColor, aColor };
|
|
|
|
gfxContext *ctx = aRenderingContext.ThebesContext();
|
|
|
|
ctx->Save();
|
|
|
|
// Because this renders a dotted border, the background color
|
|
// should not be used. Therefore, we provide a value that will
|
|
// be blatantly wrong if it ever does get used. (If this becomes
|
|
// something that CSS can style, this function will then have access
|
|
// to a style context and can use the same logic that PaintBorder
|
|
// and PaintOutline do.)
|
|
nsCSSBorderRenderer br(oneDevPixel,
|
|
ctx,
|
|
focusRect,
|
|
focusStyles,
|
|
focusWidths,
|
|
focusRadii,
|
|
focusColors,
|
|
nsnull, 0,
|
|
NS_RGB(255, 0, 0));
|
|
br.DrawBorders();
|
|
|
|
ctx->Restore();
|
|
|
|
SN();
|
|
}
|
|
|
|
// Thebes Border Rendering Code End
|
|
//----------------------------------------------------------------------
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
/**
|
|
* Computes the placement of a background image.
|
|
*
|
|
* @param aOriginBounds is the box to which the tiling position should be
|
|
* relative
|
|
* This should correspond to 'background-origin' for the frame,
|
|
* except when painting on the canvas, in which case the origin bounds
|
|
* should be the bounds of the root element's frame.
|
|
* @param aTopLeft the top-left corner where an image tile should be drawn
|
|
* @param aAnchorPoint a point which should be pixel-aligned by
|
|
* nsLayoutUtils::DrawImage. This is the same as aTopLeft, unless CSS
|
|
* specifies a percentage (including 'right' or 'bottom'), in which case
|
|
* it's that percentage within of aOriginBounds. So 'right' would set
|
|
* aAnchorPoint.x to aOriginBounds.XMost().
|
|
*
|
|
* Points are returned relative to aOriginBounds.
|
|
*/
|
|
static void
|
|
ComputeBackgroundAnchorPoint(const nsStyleBackground::Layer& aLayer,
|
|
const nsSize& aOriginBounds,
|
|
const nsSize& aImageSize,
|
|
nsPoint* aTopLeft,
|
|
nsPoint* aAnchorPoint)
|
|
{
|
|
if (!aLayer.mPosition.mXIsPercent) {
|
|
aTopLeft->x = aAnchorPoint->x = aLayer.mPosition.mXPosition.mCoord;
|
|
}
|
|
else {
|
|
double percent = aLayer.mPosition.mXPosition.mFloat;
|
|
aAnchorPoint->x = NSToCoordRound(percent*aOriginBounds.width);
|
|
aTopLeft->x = NSToCoordRound(percent*(aOriginBounds.width - aImageSize.width));
|
|
}
|
|
|
|
if (!aLayer.mPosition.mYIsPercent) {
|
|
aTopLeft->y = aAnchorPoint->y = aLayer.mPosition.mYPosition.mCoord;
|
|
}
|
|
else {
|
|
double percent = aLayer.mPosition.mYPosition.mFloat;
|
|
aAnchorPoint->y = NSToCoordRound(percent*aOriginBounds.height);
|
|
aTopLeft->y = NSToCoordRound(percent*(aOriginBounds.height - aImageSize.height));
|
|
}
|
|
}
|
|
|
|
nsStyleContext*
|
|
nsCSSRendering::FindNonTransparentBackground(nsStyleContext* aContext,
|
|
PRBool aStartAtParent /*= PR_FALSE*/)
|
|
{
|
|
NS_ASSERTION(aContext, "Cannot find NonTransparentBackground in a null context" );
|
|
|
|
nsStyleContext* context = nsnull;
|
|
if (aStartAtParent) {
|
|
context = aContext->GetParent();
|
|
}
|
|
if (!context) {
|
|
context = aContext;
|
|
}
|
|
|
|
while (context) {
|
|
const nsStyleBackground* bg = context->GetStyleBackground();
|
|
if (NS_GET_A(bg->mBackgroundColor) > 0)
|
|
break;
|
|
|
|
const nsStyleDisplay* display = context->GetStyleDisplay();
|
|
if (display->mAppearance)
|
|
break;
|
|
|
|
nsStyleContext* parent = context->GetParent();
|
|
if (!parent)
|
|
break;
|
|
|
|
context = parent;
|
|
}
|
|
return context;
|
|
}
|
|
|
|
// Returns true if aFrame is a canvas frame.
|
|
// We need to treat the viewport as canvas because, even though
|
|
// it does not actually paint a background, we need to get the right
|
|
// background style so we correctly detect transparent documents.
|
|
PRBool
|
|
nsCSSRendering::IsCanvasFrame(nsIFrame* aFrame)
|
|
{
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
return frameType == nsGkAtoms::canvasFrame ||
|
|
frameType == nsGkAtoms::rootFrame ||
|
|
frameType == nsGkAtoms::pageFrame ||
|
|
frameType == nsGkAtoms::pageContentFrame ||
|
|
frameType == nsGkAtoms::viewportFrame;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsCSSRendering::FindRootFrame(nsIFrame* aForFrame)
|
|
{
|
|
const nsStyleBackground* result = aForFrame->GetStyleBackground();
|
|
|
|
// Check if we need to do propagation from BODY rather than HTML.
|
|
if (result->IsTransparent()) {
|
|
nsIContent* content = aForFrame->GetContent();
|
|
// The root element content can't be null. We wouldn't know what
|
|
// frame to create for aFrame.
|
|
// Use |GetOwnerDoc| so it works during destruction.
|
|
if (content) {
|
|
nsIDocument* document = content->GetOwnerDoc();
|
|
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(document);
|
|
if (htmlDoc) {
|
|
nsIContent* bodyContent = htmlDoc->GetBodyContentExternal();
|
|
// We need to null check the body node (bug 118829) since
|
|
// there are cases, thanks to the fix for bug 5569, where we
|
|
// will reflow a document with no body. In particular, if a
|
|
// SCRIPT element in the head blocks the parser and then has a
|
|
// SCRIPT that does "document.location.href = 'foo'", then
|
|
// nsParser::Terminate will call |DidBuildModel| methods
|
|
// through to the content sink, which will call |StartLayout|
|
|
// and thus |InitialReflow| on the pres shell. See bug 119351
|
|
// for the ugly details.
|
|
if (bodyContent) {
|
|
nsIFrame *bodyFrame = aForFrame->PresContext()->GetPresShell()->
|
|
GetPrimaryFrameFor(bodyContent);
|
|
if (bodyFrame) {
|
|
return bodyFrame;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return aForFrame;
|
|
}
|
|
|
|
/**
|
|
* |FindBackground| finds the correct style data to use to paint the
|
|
* background. It is responsible for handling the following two
|
|
* statements in section 14.2 of CSS2:
|
|
*
|
|
* The background of the box generated by the root element covers the
|
|
* entire canvas.
|
|
*
|
|
* For HTML documents, however, we recommend that authors specify the
|
|
* background for the BODY element rather than the HTML element. User
|
|
* agents should observe the following precedence rules to fill in the
|
|
* background: if the value of the 'background' property for the HTML
|
|
* element is different from 'transparent' then use it, else use the
|
|
* value of the 'background' property for the BODY element. If the
|
|
* resulting value is 'transparent', the rendering is undefined.
|
|
*
|
|
* Thus, in our implementation, it is responsible for ensuring that:
|
|
* + we paint the correct background on the |nsCanvasFrame|,
|
|
* |nsRootBoxFrame|, or |nsPageFrame|,
|
|
* + we don't paint the background on the root element, and
|
|
* + we don't paint the background on the BODY element in *some* cases,
|
|
* and for SGML-based HTML documents only.
|
|
*
|
|
* |FindBackground| returns true if a background should be painted, and
|
|
* the resulting style context to use for the background information
|
|
* will be filled in to |aBackground|.
|
|
*/
|
|
const nsStyleBackground*
|
|
nsCSSRendering::FindRootFrameBackground(nsIFrame* aForFrame)
|
|
{
|
|
return FindRootFrame(aForFrame)->GetStyleBackground();
|
|
}
|
|
|
|
inline void
|
|
FindCanvasBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame,
|
|
const nsStyleBackground** aBackground)
|
|
{
|
|
if (aRootElementFrame) {
|
|
*aBackground = nsCSSRendering::FindRootFrameBackground(aRootElementFrame);
|
|
} else {
|
|
// This should always give transparent, so we'll fill it in with the
|
|
// default color if needed. This seems to happen a bit while a page is
|
|
// being loaded.
|
|
*aBackground = aForFrame->GetStyleBackground();
|
|
}
|
|
}
|
|
|
|
inline PRBool
|
|
FindElementBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame,
|
|
const nsStyleBackground** aBackground)
|
|
{
|
|
if (aForFrame == aRootElementFrame) {
|
|
// We must have propagated our background to the viewport or canvas. Abort.
|
|
return PR_FALSE;
|
|
}
|
|
|
|
*aBackground = aForFrame->GetStyleBackground();
|
|
|
|
// Return true unless the frame is for a BODY element whose background
|
|
// was propagated to the viewport.
|
|
|
|
nsIContent* content = aForFrame->GetContent();
|
|
if (!content || content->Tag() != nsGkAtoms::body)
|
|
return PR_TRUE; // not frame for a "body" element
|
|
// It could be a non-HTML "body" element but that's OK, we'd fail the
|
|
// bodyContent check below
|
|
|
|
if (aForFrame->GetStyleContext()->GetPseudoType())
|
|
return PR_TRUE; // A pseudo-element frame.
|
|
|
|
// We should only look at the <html> background if we're in an HTML document
|
|
nsIDocument* document = content->GetOwnerDoc();
|
|
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(document);
|
|
if (!htmlDoc)
|
|
return PR_TRUE;
|
|
|
|
nsIContent* bodyContent = htmlDoc->GetBodyContentExternal();
|
|
if (bodyContent != content)
|
|
return PR_TRUE; // this wasn't the background that was propagated
|
|
|
|
// This can be called even when there's no root element yet, during frame
|
|
// construction, via nsLayoutUtils::FrameHasTransparency and
|
|
// nsContainerFrame::SyncFrameViewProperties.
|
|
if (!aRootElementFrame)
|
|
return PR_TRUE;
|
|
|
|
const nsStyleBackground* htmlBG = aRootElementFrame->GetStyleBackground();
|
|
return !htmlBG->IsTransparent();
|
|
}
|
|
|
|
PRBool
|
|
nsCSSRendering::FindBackground(nsPresContext* aPresContext,
|
|
nsIFrame* aForFrame,
|
|
const nsStyleBackground** aBackground)
|
|
{
|
|
nsIFrame* rootElementFrame =
|
|
aPresContext->PresShell()->FrameConstructor()->GetRootElementStyleFrame();
|
|
if (IsCanvasFrame(aForFrame)) {
|
|
FindCanvasBackground(aForFrame, rootElementFrame, aBackground);
|
|
return PR_TRUE;
|
|
} else {
|
|
return FindElementBackground(aForFrame, rootElementFrame, aBackground);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::DidPaint()
|
|
{
|
|
gInlineBGData->Reset();
|
|
}
|
|
|
|
PRBool
|
|
nsCSSRendering::GetBorderRadiusTwips(const nsStyleCorners& aBorderRadius,
|
|
const nscoord& aFrameWidth,
|
|
nscoord aRadii[8])
|
|
{
|
|
PRBool result = PR_FALSE;
|
|
|
|
// Convert percentage values
|
|
NS_FOR_CSS_HALF_CORNERS(i) {
|
|
const nsStyleCoord c = aBorderRadius.Get(i);
|
|
|
|
switch (c.GetUnit()) {
|
|
case eStyleUnit_Percent:
|
|
aRadii[i] = (nscoord)(c.GetPercentValue() * aFrameWidth);
|
|
break;
|
|
|
|
case eStyleUnit_Coord:
|
|
aRadii[i] = c.GetCoordValue();
|
|
break;
|
|
|
|
default:
|
|
NS_NOTREACHED("GetBorderRadiusTwips: bad unit");
|
|
aRadii[i] = 0;
|
|
break;
|
|
}
|
|
|
|
if (aRadii[i])
|
|
result = PR_TRUE;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintBoxShadowOuter(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aFrameArea,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
nsCSSShadowArray* shadows = aForFrame->GetEffectiveBoxShadows();
|
|
if (!shadows)
|
|
return;
|
|
const nsStyleBorder* styleBorder = aForFrame->GetStyleBorder();
|
|
PRIntn sidesToSkip = aForFrame->GetSkipSides();
|
|
|
|
// Get any border radius, since box-shadow must also have rounded corners if the frame does
|
|
nscoord twipsRadii[8];
|
|
PRBool hasBorderRadius = GetBorderRadiusTwips(styleBorder->mBorderRadius,
|
|
aFrameArea.width, twipsRadii);
|
|
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
|
|
|
gfxCornerSizes borderRadii;
|
|
ComputePixelRadii(twipsRadii, aFrameArea, sidesToSkip,
|
|
twipsPerPixel, &borderRadii);
|
|
|
|
gfxRect frameGfxRect = RectToGfxRect(aFrameArea, twipsPerPixel);
|
|
frameGfxRect.Round();
|
|
gfxRect dirtyGfxRect = RectToGfxRect(aDirtyRect, twipsPerPixel);
|
|
|
|
for (PRUint32 i = shadows->Length(); i > 0; --i) {
|
|
nsCSSShadowItem* shadowItem = shadows->ShadowAt(i - 1);
|
|
if (shadowItem->mInset)
|
|
continue;
|
|
|
|
gfxRect shadowRect(aFrameArea.x, aFrameArea.y, aFrameArea.width, aFrameArea.height);
|
|
shadowRect.MoveBy(gfxPoint(shadowItem->mXOffset, shadowItem->mYOffset));
|
|
shadowRect.Outset(shadowItem->mSpread);
|
|
|
|
gfxRect shadowRectPlusBlur = shadowRect;
|
|
shadowRect.ScaleInverse(twipsPerPixel);
|
|
shadowRect.Round();
|
|
|
|
// shadowRect won't include the blur, so make an extra rect here that includes the blur
|
|
// for use in the even-odd rule below.
|
|
nscoord blurRadius = shadowItem->mRadius;
|
|
shadowRectPlusBlur.Outset(blurRadius);
|
|
shadowRectPlusBlur.ScaleInverse(twipsPerPixel);
|
|
shadowRectPlusBlur.RoundOut();
|
|
|
|
gfxContext* renderContext = aRenderingContext.ThebesContext();
|
|
nsRefPtr<gfxContext> shadowContext;
|
|
nsContextBoxBlur blurringArea;
|
|
|
|
// shadowRect is already in device pixels, pass 1 as the appunits/pixel value
|
|
blurRadius /= twipsPerPixel;
|
|
shadowContext = blurringArea.Init(shadowRect, blurRadius, 1, renderContext, dirtyGfxRect);
|
|
if (!shadowContext)
|
|
continue;
|
|
|
|
// Set the shadow color; if not specified, use the foreground color
|
|
nscolor shadowColor;
|
|
if (shadowItem->mHasColor)
|
|
shadowColor = shadowItem->mColor;
|
|
else
|
|
shadowColor = aForFrame->GetStyleColor()->mColor;
|
|
|
|
renderContext->Save();
|
|
renderContext->SetColor(gfxRGBA(shadowColor));
|
|
|
|
// Clip out the area of the actual frame so the shadow is not shown within
|
|
// the frame
|
|
renderContext->NewPath();
|
|
renderContext->Rectangle(shadowRectPlusBlur);
|
|
if (hasBorderRadius)
|
|
renderContext->RoundedRectangle(frameGfxRect, borderRadii);
|
|
else
|
|
renderContext->Rectangle(frameGfxRect);
|
|
renderContext->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD);
|
|
renderContext->Clip();
|
|
|
|
// Draw the shape of the frame so it can be blurred. Recall how nsContextBoxBlur
|
|
// doesn't make any temporary surfaces if blur is 0 and it just returns the original
|
|
// surface? If we have no blur, we're painting this fill on the actual content surface
|
|
// (renderContext == shadowContext) which is why we set up the color and clip
|
|
// before doing this.
|
|
shadowContext->NewPath();
|
|
if (hasBorderRadius)
|
|
shadowContext->RoundedRectangle(shadowRect, borderRadii);
|
|
else
|
|
shadowContext->Rectangle(shadowRect);
|
|
shadowContext->Fill();
|
|
|
|
blurringArea.DoPaint();
|
|
renderContext->Restore();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintBoxShadowInner(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aFrameArea,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
nsCSSShadowArray* shadows = aForFrame->GetEffectiveBoxShadows();
|
|
if (!shadows)
|
|
return;
|
|
const nsStyleBorder* styleBorder = aForFrame->GetStyleBorder();
|
|
|
|
// Get any border radius, since box-shadow must also have rounded corners if the frame does
|
|
nscoord twipsRadii[8];
|
|
PRBool hasBorderRadius = GetBorderRadiusTwips(styleBorder->mBorderRadius,
|
|
aFrameArea.width, twipsRadii);
|
|
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
|
|
|
nsRect paddingRect = aFrameArea;
|
|
nsMargin border = aForFrame->GetUsedBorder();
|
|
aForFrame->ApplySkipSides(border);
|
|
paddingRect.Deflate(border);
|
|
|
|
gfxCornerSizes innerRadii;
|
|
if (hasBorderRadius) {
|
|
gfxCornerSizes borderRadii;
|
|
PRIntn sidesToSkip = aForFrame->GetSkipSides();
|
|
|
|
ComputePixelRadii(twipsRadii, aFrameArea, sidesToSkip,
|
|
twipsPerPixel, &borderRadii);
|
|
gfxFloat borderSizes[4] = {
|
|
border.top / twipsPerPixel, border.right / twipsPerPixel,
|
|
border.bottom / twipsPerPixel, border.left / twipsPerPixel
|
|
};
|
|
nsCSSBorderRenderer::ComputeInnerRadii(borderRadii, borderSizes,
|
|
&innerRadii);
|
|
}
|
|
|
|
gfxRect frameGfxRect = RectToGfxRect(paddingRect, twipsPerPixel);
|
|
frameGfxRect.Round();
|
|
gfxRect dirtyGfxRect = RectToGfxRect(aDirtyRect, twipsPerPixel);
|
|
|
|
for (PRUint32 i = shadows->Length(); i > 0; --i) {
|
|
nsCSSShadowItem* shadowItem = shadows->ShadowAt(i - 1);
|
|
if (!shadowItem->mInset)
|
|
continue;
|
|
|
|
/*
|
|
* shadowRect: the frame's padding rect
|
|
* shadowPaintRect: the area to paint on the temp surface, larger than shadowRect
|
|
* so that blurs still happen properly near the edges
|
|
* shadowClipRect: the area on the temporary surface within shadowPaintRect
|
|
* that we will NOT paint in
|
|
*/
|
|
nscoord blurRadius = shadowItem->mRadius;
|
|
gfxRect shadowRect(paddingRect.x, paddingRect.y, paddingRect.width, paddingRect.height);
|
|
gfxRect shadowPaintRect = shadowRect;
|
|
shadowPaintRect.Outset(blurRadius);
|
|
|
|
gfxRect shadowClipRect = shadowRect;
|
|
shadowClipRect.MoveBy(gfxPoint(shadowItem->mXOffset, shadowItem->mYOffset));
|
|
shadowClipRect.Inset(shadowItem->mSpread);
|
|
|
|
shadowRect.ScaleInverse(twipsPerPixel);
|
|
shadowRect.Round();
|
|
shadowPaintRect.ScaleInverse(twipsPerPixel);
|
|
shadowPaintRect.RoundOut();
|
|
shadowClipRect.ScaleInverse(twipsPerPixel);
|
|
shadowClipRect.Round();
|
|
|
|
gfxContext* renderContext = aRenderingContext.ThebesContext();
|
|
nsRefPtr<gfxContext> shadowContext;
|
|
nsContextBoxBlur blurringArea;
|
|
|
|
// shadowPaintRect is already in device pixels, pass 1 as the appunits/pixel value
|
|
blurRadius /= twipsPerPixel;
|
|
shadowContext = blurringArea.Init(shadowPaintRect, blurRadius, 1, renderContext, dirtyGfxRect);
|
|
if (!shadowContext)
|
|
continue;
|
|
|
|
// Set the shadow color; if not specified, use the foreground color
|
|
nscolor shadowColor;
|
|
if (shadowItem->mHasColor)
|
|
shadowColor = shadowItem->mColor;
|
|
else
|
|
shadowColor = aForFrame->GetStyleColor()->mColor;
|
|
|
|
renderContext->Save();
|
|
renderContext->SetColor(gfxRGBA(shadowColor));
|
|
|
|
// Clip the context to the area of the frame's padding rect, so no part of the
|
|
// shadow is painted outside
|
|
renderContext->NewPath();
|
|
if (hasBorderRadius)
|
|
renderContext->RoundedRectangle(shadowRect, innerRadii, PR_FALSE);
|
|
else
|
|
renderContext->Rectangle(shadowRect);
|
|
renderContext->Clip();
|
|
|
|
// Fill the temporary surface minus the area within the frame that we should
|
|
// not paint in, and blur and apply it
|
|
shadowContext->NewPath();
|
|
shadowContext->Rectangle(shadowPaintRect);
|
|
if (hasBorderRadius)
|
|
shadowContext->RoundedRectangle(shadowClipRect, innerRadii, PR_FALSE);
|
|
else
|
|
shadowContext->Rectangle(shadowClipRect);
|
|
shadowContext->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD);
|
|
shadowContext->Fill();
|
|
|
|
blurringArea.DoPaint();
|
|
renderContext->Restore();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintBackground(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aDirtyRect,
|
|
const nsRect& aBorderArea,
|
|
PRBool aUsePrintSettings,
|
|
nsRect* aBGClipRect)
|
|
{
|
|
NS_PRECONDITION(aForFrame,
|
|
"Frame is expected to be provided to PaintBackground");
|
|
|
|
const nsStyleBackground *color;
|
|
if (!FindBackground(aPresContext, aForFrame, &color)) {
|
|
// we don't want to bail out of moz-appearance is set on a root
|
|
// node. If it has a parent content node, bail because it's not
|
|
// a root, other wise keep going in order to let the theme stuff
|
|
// draw the background. The canvas really should be drawing the
|
|
// bg, but there's no way to hook that up via css.
|
|
if (!aForFrame->GetStyleDisplay()->mAppearance) {
|
|
return;
|
|
}
|
|
|
|
nsIContent* content = aForFrame->GetContent();
|
|
if (!content || content->GetParent()) {
|
|
return;
|
|
}
|
|
|
|
color = aForFrame->GetStyleBackground();
|
|
}
|
|
|
|
PaintBackgroundWithSC(aPresContext, aRenderingContext, aForFrame,
|
|
aDirtyRect, aBorderArea, *color,
|
|
*aForFrame->GetStyleBorder(),
|
|
aUsePrintSettings, aBGClipRect);
|
|
}
|
|
|
|
static PRBool
|
|
IsSolidBorderEdge(const nsStyleBorder& aBorder, PRUint32 aSide)
|
|
{
|
|
if (aBorder.GetActualBorder().side(aSide) == 0)
|
|
return PR_TRUE;
|
|
if (aBorder.GetBorderStyle(aSide) != NS_STYLE_BORDER_STYLE_SOLID)
|
|
return PR_FALSE;
|
|
|
|
// If we're using a border image, assume it's not fully opaque,
|
|
// because we may not even have the image loaded at this point, and
|
|
// even if we did, checking whether the relevant tile is fully
|
|
// opaque would be too much work.
|
|
if (aBorder.GetBorderImage())
|
|
return PR_FALSE;
|
|
|
|
nscolor color;
|
|
PRBool isForeground;
|
|
aBorder.GetBorderColor(aSide, color, isForeground);
|
|
|
|
// We don't know the foreground color here, so if it's being used
|
|
// we must assume it might be transparent.
|
|
if (isForeground)
|
|
return PR_FALSE;
|
|
|
|
return NS_GET_A(color) == 255;
|
|
}
|
|
|
|
/**
|
|
* Returns true if all border edges are either missing or opaque.
|
|
*/
|
|
static PRBool
|
|
IsSolidBorder(const nsStyleBorder& aBorder)
|
|
{
|
|
if (aBorder.mBorderColors)
|
|
return PR_FALSE;
|
|
for (PRUint32 i = 0; i < 4; ++i) {
|
|
if (!IsSolidBorderEdge(aBorder, i))
|
|
return PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
static PRBool
|
|
UseImageRequestForBackground(imgIRequest *aRequest)
|
|
{
|
|
if (!aRequest)
|
|
return PR_FALSE;
|
|
|
|
PRUint32 status = imgIRequest::STATUS_ERROR;
|
|
aRequest->GetImageStatus(&status);
|
|
|
|
return (status & imgIRequest::STATUS_FRAME_COMPLETE) &&
|
|
(status & imgIRequest::STATUS_SIZE_AVAILABLE);
|
|
}
|
|
|
|
static inline void
|
|
SetupDirtyRects(const nsRect& aBGClipArea, const nsRect& aCallerDirtyRect,
|
|
nscoord aAppUnitsPerPixel,
|
|
/* OUT: */
|
|
nsRect* aDirtyRect, gfxRect* aDirtyRectGfx)
|
|
{
|
|
aDirtyRect->IntersectRect(aBGClipArea, aCallerDirtyRect);
|
|
|
|
// Compute the Thebes equivalent of the dirtyRect.
|
|
*aDirtyRectGfx = RectToGfxRect(*aDirtyRect, aAppUnitsPerPixel);
|
|
NS_WARN_IF_FALSE(aDirtyRect->IsEmpty() || !aDirtyRectGfx->IsEmpty(),
|
|
"converted dirty rect should not be empty");
|
|
NS_ABORT_IF_FALSE(!aDirtyRect->IsEmpty() || aDirtyRectGfx->IsEmpty(),
|
|
"second should be empty if first is");
|
|
}
|
|
|
|
static void
|
|
SetupBackgroundClip(gfxContext *aCtx, PRUint8 aBackgroundClip,
|
|
nsIFrame* aForFrame, const nsRect& aBorderArea,
|
|
const nsRect& aCallerDirtyRect, PRBool aHaveRoundedCorners,
|
|
const gfxCornerSizes& aBGRadii, nscoord aAppUnitsPerPixel,
|
|
gfxContextAutoSaveRestore* aAutoSR,
|
|
/* OUT: */
|
|
nsRect* aBGClipArea, nsRect* aDirtyRect,
|
|
gfxRect* aDirtyRectGfx)
|
|
{
|
|
*aBGClipArea = aBorderArea;
|
|
PRBool radiiAreOuter = PR_TRUE;
|
|
gfxCornerSizes clippedRadii = aBGRadii;
|
|
if (aBackgroundClip != NS_STYLE_BG_CLIP_BORDER) {
|
|
NS_ASSERTION(aBackgroundClip == NS_STYLE_BG_CLIP_PADDING,
|
|
"unexpected background-clip");
|
|
nsMargin border = aForFrame->GetUsedBorder();
|
|
aForFrame->ApplySkipSides(border);
|
|
aBGClipArea->Deflate(border);
|
|
|
|
if (aHaveRoundedCorners) {
|
|
gfxFloat borderSizes[4] = {
|
|
border.top / aAppUnitsPerPixel, border.right / aAppUnitsPerPixel,
|
|
border.bottom / aAppUnitsPerPixel, border.left / aAppUnitsPerPixel
|
|
};
|
|
nsCSSBorderRenderer::ComputeInnerRadii(aBGRadii, borderSizes,
|
|
&clippedRadii);
|
|
radiiAreOuter = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
SetupDirtyRects(*aBGClipArea, aCallerDirtyRect, aAppUnitsPerPixel,
|
|
aDirtyRect, aDirtyRectGfx);
|
|
|
|
if (aDirtyRectGfx->IsEmpty()) {
|
|
// Our caller won't draw anything under this condition, so no need
|
|
// to set more up.
|
|
return;
|
|
}
|
|
|
|
// If we have rounded corners, clip all subsequent drawing to the
|
|
// rounded rectangle defined by bgArea and bgRadii (we don't know
|
|
// whether the rounded corners intrude on the dirtyRect or not).
|
|
// Do not do this if we have a caller-provided clip rect --
|
|
// as above with bgArea, arguably a bug, but table painting seems
|
|
// to depend on it.
|
|
|
|
if (aHaveRoundedCorners) {
|
|
gfxRect bgAreaGfx(RectToGfxRect(*aBGClipArea, aAppUnitsPerPixel));
|
|
bgAreaGfx.Round();
|
|
bgAreaGfx.Condition();
|
|
|
|
if (bgAreaGfx.IsEmpty()) {
|
|
// I think it's become possible to hit this since
|
|
// http://hg.mozilla.org/mozilla-central/rev/50e934e4979b landed.
|
|
NS_WARNING("converted background area should not be empty");
|
|
// Make our caller not do anything.
|
|
aDirtyRectGfx->size.SizeTo(0.0, 0.0);
|
|
return;
|
|
}
|
|
|
|
aAutoSR->Reset(aCtx);
|
|
aCtx->NewPath();
|
|
aCtx->RoundedRectangle(bgAreaGfx, clippedRadii, radiiAreOuter);
|
|
aCtx->Clip();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::PaintBackgroundWithSC(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aDirtyRect,
|
|
const nsRect& aBorderArea,
|
|
const nsStyleBackground& aColor,
|
|
const nsStyleBorder& aBorder,
|
|
PRBool aUsePrintSettings,
|
|
nsRect* aBGClipRect)
|
|
{
|
|
NS_PRECONDITION(aForFrame,
|
|
"Frame is expected to be provided to PaintBackground");
|
|
|
|
// Check to see if we have an appearance defined. If so, we let the theme
|
|
// renderer draw the background and bail out.
|
|
// XXXzw this ignores aBGClipRect.
|
|
const nsStyleDisplay* displayData = aForFrame->GetStyleDisplay();
|
|
if (displayData->mAppearance) {
|
|
nsITheme *theme = aPresContext->GetTheme();
|
|
if (theme && theme->ThemeSupportsWidget(aPresContext, aForFrame,
|
|
displayData->mAppearance)) {
|
|
nsRect dirty;
|
|
dirty.IntersectRect(aDirtyRect, aBorderArea);
|
|
theme->DrawWidgetBackground(&aRenderingContext, aForFrame,
|
|
displayData->mAppearance, aBorderArea, dirty);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Determine whether we are drawing background images and/or
|
|
// background colors.
|
|
PRBool drawBackgroundImage = PR_TRUE;
|
|
PRBool drawBackgroundColor = PR_TRUE;
|
|
|
|
if (aUsePrintSettings) {
|
|
drawBackgroundImage = aPresContext->GetBackgroundImageDraw();
|
|
drawBackgroundColor = aPresContext->GetBackgroundColorDraw();
|
|
}
|
|
|
|
nsStyleBackground::Image bottomImage(aColor.BottomLayer().mImage);
|
|
PRBool useFallbackColor = PR_FALSE;
|
|
if (bottomImage.mSpecified) {
|
|
if (!drawBackgroundImage ||
|
|
!UseImageRequestForBackground(bottomImage.mRequest)) {
|
|
bottomImage.mRequest = nsnull;
|
|
}
|
|
useFallbackColor = bottomImage.mRequest == nsnull;
|
|
} else {
|
|
NS_ASSERTION(bottomImage.mRequest == nsnull, "malformed image struct");
|
|
}
|
|
|
|
// If GetBackgroundColorDraw() is false, we are still expected to
|
|
// draw color in the background of any frame that's not completely
|
|
// transparent, but we are expected to use white instead of whatever
|
|
// color was specified.
|
|
nscolor bgColor;
|
|
if (drawBackgroundColor) {
|
|
bgColor = useFallbackColor ? aColor.mFallbackBackgroundColor
|
|
: aColor.mBackgroundColor;
|
|
if (NS_GET_A(bgColor) == 0)
|
|
drawBackgroundColor = PR_FALSE;
|
|
} else {
|
|
bgColor = NS_RGB(255, 255, 255);
|
|
if (drawBackgroundImage || !aColor.IsTransparent())
|
|
drawBackgroundColor = PR_TRUE;
|
|
}
|
|
|
|
// At this point, drawBackgroundImage and drawBackgroundColor are
|
|
// true if and only if we are actually supposed to paint an image or
|
|
// color into aDirtyRect, respectively.
|
|
if (!drawBackgroundImage && !drawBackgroundColor)
|
|
return;
|
|
|
|
// Compute the outermost boundary of the area that might be painted.
|
|
gfxContext *ctx = aRenderingContext.ThebesContext();
|
|
nscoord appUnitsPerPixel = aPresContext->AppUnitsPerDevPixel();
|
|
|
|
// Same coordinate space as aBorderArea & aBGClipRect
|
|
gfxCornerSizes bgRadii;
|
|
PRBool haveRoundedCorners;
|
|
{
|
|
nscoord radii[8];
|
|
haveRoundedCorners =
|
|
GetBorderRadiusTwips(aBorder.mBorderRadius, aForFrame->GetSize().width,
|
|
radii);
|
|
if (haveRoundedCorners)
|
|
ComputePixelRadii(radii, aBorderArea, aForFrame->GetSkipSides(),
|
|
appUnitsPerPixel, &bgRadii);
|
|
}
|
|
|
|
// The 'bgClipArea' (used only by the image tiling logic, far below)
|
|
// is the caller-provided aBGClipRect if any, or else the area
|
|
// determined by the value of 'background-clip' in
|
|
// SetupCurrentBackgroundClip. (Arguably it should be the
|
|
// intersection, but that breaks the table painter -- in particular,
|
|
// taking the intersection breaks reftests/bugs/403429-1[ab].)
|
|
nsRect bgClipArea, dirtyRect;
|
|
gfxRect dirtyRectGfx;
|
|
PRUint8 currentBackgroundClip;
|
|
PRBool isSolidBorder;
|
|
gfxContextAutoSaveRestore autoSR;
|
|
if (aBGClipRect) {
|
|
bgClipArea = *aBGClipRect;
|
|
SetupDirtyRects(bgClipArea, aDirtyRect, appUnitsPerPixel,
|
|
&dirtyRect, &dirtyRectGfx);
|
|
} else {
|
|
// The background is rendered over the 'background-clip' area,
|
|
// which is normally equal to the border area but may be reduced
|
|
// to the padding area by CSS. Also, if the border is solid, we
|
|
// don't need to draw outside the padding area. In either case,
|
|
// if the borders are rounded, make sure we use the same inner
|
|
// radii as the border code will.
|
|
// The background-color is drawn based on the bottom
|
|
// background-clip.
|
|
currentBackgroundClip = aColor.BottomLayer().mClip;
|
|
isSolidBorder = IsSolidBorder(aBorder);
|
|
if (isSolidBorder)
|
|
currentBackgroundClip = NS_STYLE_BG_CLIP_PADDING;
|
|
SetupBackgroundClip(ctx, currentBackgroundClip, aForFrame,
|
|
aBorderArea, aDirtyRect, haveRoundedCorners,
|
|
bgRadii, appUnitsPerPixel, &autoSR,
|
|
&bgClipArea, &dirtyRect, &dirtyRectGfx);
|
|
}
|
|
|
|
// If we might be using a background color, go ahead and set it now.
|
|
if (drawBackgroundColor)
|
|
ctx->SetColor(gfxRGBA(bgColor));
|
|
|
|
// If there is no background image, draw a color. (If there is
|
|
// neither a background image nor a color, we wouldn't have gotten
|
|
// this far.)
|
|
if (!drawBackgroundImage) {
|
|
if (!dirtyRectGfx.IsEmpty()) {
|
|
ctx->NewPath();
|
|
ctx->Rectangle(dirtyRectGfx, PR_TRUE);
|
|
ctx->Fill();
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Ensure we get invalidated for loads of the image. We need to do
|
|
// this here because this might be the only code that knows about the
|
|
// association of the style data with the frame.
|
|
aPresContext->SetupBackgroundImageLoaders(aForFrame, &aColor);
|
|
|
|
if (bottomImage.mRequest &&
|
|
aColor.BottomLayer().mRepeat == NS_STYLE_BG_REPEAT_XY &&
|
|
drawBackgroundColor) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
bottomImage.mRequest->GetImage(getter_AddRefs(image));
|
|
// If the image is completely opaque, we may not need to paint
|
|
// the background color.
|
|
nsCOMPtr<gfxIImageFrame> gfxImgFrame;
|
|
image->GetCurrentFrame(getter_AddRefs(gfxImgFrame));
|
|
if (gfxImgFrame) {
|
|
gfxImgFrame->GetNeedsBackground(&drawBackgroundColor);
|
|
if (!drawBackgroundColor) {
|
|
// If the current frame is smaller than its container, we
|
|
// need to paint the background color even if the frame
|
|
// itself is opaque.
|
|
nsIntSize iSize;
|
|
image->GetWidth(&iSize.width);
|
|
image->GetHeight(&iSize.height);
|
|
nsIntRect iframeRect;
|
|
gfxImgFrame->GetRect(iframeRect);
|
|
if (iSize.width != iframeRect.width ||
|
|
iSize.height != iframeRect.height) {
|
|
drawBackgroundColor = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// The background color is rendered over the entire dirty area,
|
|
// even if the image isn't.
|
|
if (drawBackgroundColor) {
|
|
if (!dirtyRectGfx.IsEmpty()) {
|
|
ctx->NewPath();
|
|
ctx->Rectangle(dirtyRectGfx, PR_TRUE);
|
|
ctx->Fill();
|
|
}
|
|
}
|
|
|
|
if (drawBackgroundImage) {
|
|
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, &aColor) {
|
|
const nsStyleBackground::Layer &layer = aColor.mLayers[i];
|
|
if (!aBGClipRect) {
|
|
PRUint8 newBackgroundClip =
|
|
isSolidBorder ? NS_STYLE_BG_CLIP_PADDING : layer.mClip;
|
|
if (currentBackgroundClip != newBackgroundClip) {
|
|
currentBackgroundClip = newBackgroundClip;
|
|
SetupBackgroundClip(ctx, currentBackgroundClip, aForFrame,
|
|
aBorderArea, aDirtyRect, haveRoundedCorners,
|
|
bgRadii, appUnitsPerPixel, &autoSR,
|
|
&bgClipArea, &dirtyRect, &dirtyRectGfx);
|
|
}
|
|
}
|
|
if (!dirtyRectGfx.IsEmpty()) {
|
|
PaintBackgroundLayer(aPresContext, aRenderingContext, aForFrame,
|
|
dirtyRect, aBorderArea, bgClipArea, aColor,
|
|
layer, aBorder, aUsePrintSettings);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
PaintBackgroundLayer(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aDirtyRect, // intersected with aBGClipRect
|
|
const nsRect& aBorderArea,
|
|
const nsRect& aBGClipRect,
|
|
const nsStyleBackground& aBackground,
|
|
const nsStyleBackground::Layer& aLayer,
|
|
const nsStyleBorder& aBorder,
|
|
PRBool aUsePrintSettings)
|
|
{
|
|
// Lookup the image
|
|
imgIRequest *req = aLayer.mImage.mRequest;
|
|
if (!UseImageRequestForBackground(req)) {
|
|
// There's no image or it's not ready to be painted.
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<imgIContainer> image;
|
|
req->GetImage(getter_AddRefs(image));
|
|
|
|
nsIntSize imageIntSize;
|
|
image->GetWidth(&imageIntSize.width);
|
|
image->GetHeight(&imageIntSize.height);
|
|
|
|
nsSize imageSize;
|
|
imageSize.width = nsPresContext::CSSPixelsToAppUnits(imageIntSize.width);
|
|
imageSize.height = nsPresContext::CSSPixelsToAppUnits(imageIntSize.height);
|
|
|
|
req = nsnull;
|
|
|
|
// relative to aBorderArea
|
|
nsRect bgOriginRect(0, 0, 0, 0);
|
|
|
|
nsIAtom* frameType = aForFrame->GetType();
|
|
nsIFrame* geometryFrame = aForFrame;
|
|
if (frameType == nsGkAtoms::inlineFrame ||
|
|
frameType == nsGkAtoms::positionedInlineFrame) {
|
|
switch (aBackground.mBackgroundInlinePolicy) {
|
|
case NS_STYLE_BG_INLINE_POLICY_EACH_BOX:
|
|
bgOriginRect = nsRect(nsPoint(0,0), aBorderArea.Size());
|
|
break;
|
|
case NS_STYLE_BG_INLINE_POLICY_BOUNDING_BOX:
|
|
bgOriginRect = gInlineBGData->GetBoundingRect(aForFrame);
|
|
break;
|
|
default:
|
|
NS_ERROR("Unknown background-inline-policy value! "
|
|
"Please, teach me what to do.");
|
|
case NS_STYLE_BG_INLINE_POLICY_CONTINUOUS:
|
|
bgOriginRect = gInlineBGData->GetContinuousRect(aForFrame);
|
|
break;
|
|
}
|
|
} else if (frameType == nsGkAtoms::canvasFrame) {
|
|
geometryFrame = aForFrame->GetFirstChild(nsnull);
|
|
// geometryFrame might be null if this canvas is a page created
|
|
// as an overflow container (e.g. the in-flow content has already
|
|
// finished and this page only displays the continuations of
|
|
// absolutely positioned content).
|
|
if (geometryFrame) {
|
|
bgOriginRect = geometryFrame->GetRect();
|
|
}
|
|
} else {
|
|
bgOriginRect = nsRect(nsPoint(0,0), aBorderArea.Size());
|
|
}
|
|
|
|
// Background images are tiled over the 'background-clip' area
|
|
// but the origin of the tiling is based on the 'background-origin' area
|
|
if (aLayer.mOrigin != NS_STYLE_BG_ORIGIN_BORDER && geometryFrame) {
|
|
nsMargin border = geometryFrame->GetUsedBorder();
|
|
geometryFrame->ApplySkipSides(border);
|
|
bgOriginRect.Deflate(border);
|
|
if (aLayer.mOrigin != NS_STYLE_BG_ORIGIN_PADDING) {
|
|
nsMargin padding = geometryFrame->GetUsedPadding();
|
|
geometryFrame->ApplySkipSides(padding);
|
|
bgOriginRect.Deflate(padding);
|
|
NS_ASSERTION(aLayer.mOrigin == NS_STYLE_BG_ORIGIN_CONTENT,
|
|
"unknown background-origin value");
|
|
}
|
|
}
|
|
|
|
// Compute the anchor point.
|
|
//
|
|
// relative to aBorderArea.TopLeft() (which is where the top-left
|
|
// of aForFrame's border-box will be rendered)
|
|
nsPoint imageTopLeft, anchor;
|
|
if (NS_STYLE_BG_ATTACHMENT_FIXED == aLayer.mAttachment) {
|
|
// If it's a fixed background attachment, then the image is placed
|
|
// relative to the viewport, which is the area of the root frame
|
|
// in a screen context or the page content frame in a print context.
|
|
|
|
// Remember that we've drawn position-varying content in this prescontext
|
|
aPresContext->SetRenderedPositionVaryingContent();
|
|
|
|
nsIFrame* topFrame =
|
|
aPresContext->PresShell()->FrameManager()->GetRootFrame();
|
|
NS_ASSERTION(topFrame, "no root frame");
|
|
nsIFrame* pageContentFrame = nsnull;
|
|
if (aPresContext->IsPaginated()) {
|
|
pageContentFrame =
|
|
nsLayoutUtils::GetClosestFrameOfType(aForFrame, nsGkAtoms::pageContentFrame);
|
|
if (pageContentFrame) {
|
|
topFrame = pageContentFrame;
|
|
}
|
|
// else this is an embedded shell and its root frame is what we want
|
|
}
|
|
|
|
nsRect viewportArea(nsPoint(0, 0), topFrame->GetSize());
|
|
|
|
if (!pageContentFrame) {
|
|
// Subtract the size of scrollbars.
|
|
nsIScrollableFrame* scrollableFrame =
|
|
aPresContext->PresShell()->GetRootScrollFrameAsScrollable();
|
|
if (scrollableFrame) {
|
|
nsMargin scrollbars = scrollableFrame->GetActualScrollbarSizes();
|
|
viewportArea.Deflate(scrollbars);
|
|
}
|
|
}
|
|
|
|
// Get the anchor point, relative to the viewport.
|
|
ComputeBackgroundAnchorPoint(aLayer, viewportArea.Size(), imageSize,
|
|
&imageTopLeft, &anchor);
|
|
|
|
// Convert the anchor point from viewport coordinates to aForFrame
|
|
// coordinates.
|
|
nsPoint offset = viewportArea.TopLeft() - aForFrame->GetOffsetTo(topFrame);
|
|
imageTopLeft += offset;
|
|
anchor += offset;
|
|
} else {
|
|
ComputeBackgroundAnchorPoint(aLayer, bgOriginRect.Size(), imageSize,
|
|
&imageTopLeft, &anchor);
|
|
imageTopLeft += bgOriginRect.TopLeft();
|
|
anchor += bgOriginRect.TopLeft();
|
|
}
|
|
|
|
nsRect destArea(imageTopLeft + aBorderArea.TopLeft(), imageSize);
|
|
nsRect fillArea = destArea;
|
|
PRIntn repeat = aLayer.mRepeat;
|
|
if (repeat & NS_STYLE_BG_REPEAT_X) {
|
|
fillArea.x = aBGClipRect.x;
|
|
fillArea.width = aBGClipRect.width;
|
|
}
|
|
if (repeat & NS_STYLE_BG_REPEAT_Y) {
|
|
fillArea.y = aBGClipRect.y;
|
|
fillArea.height = aBGClipRect.height;
|
|
}
|
|
fillArea.IntersectRect(fillArea, aBGClipRect);
|
|
|
|
nsLayoutUtils::DrawImage(&aRenderingContext, image,
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(aForFrame),
|
|
destArea, fillArea, anchor + aBorderArea.TopLeft(), aDirtyRect);
|
|
}
|
|
|
|
static void
|
|
DrawBorderImage(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
const nsRect& aBorderArea,
|
|
const nsStyleBorder& aBorderStyle,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
if (aDirtyRect.IsEmpty())
|
|
return;
|
|
|
|
// Ensure we get invalidated for loads and animations of the image.
|
|
// We need to do this here because this might be the only code that
|
|
// knows about the association of the style data with the frame.
|
|
// XXX We shouldn't really... since if anybody is passing in a
|
|
// different style, they'll potentially have the wrong size for the
|
|
// border too.
|
|
aPresContext->SetupBorderImageLoaders(aForFrame, &aBorderStyle);
|
|
|
|
imgIRequest *req = aBorderStyle.GetBorderImage();
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
PRUint32 status = imgIRequest::STATUS_ERROR;
|
|
if (req)
|
|
req->GetImageStatus(&status);
|
|
|
|
NS_ASSERTION(req && (status & imgIRequest::STATUS_FRAME_COMPLETE),
|
|
"no image to draw");
|
|
}
|
|
#endif
|
|
|
|
// Get the actual image, and determine where the split points are.
|
|
// Note that mBorderImageSplit is in image pixels, not necessarily
|
|
// CSS pixels.
|
|
|
|
nsCOMPtr<imgIContainer> imgContainer;
|
|
req->GetImage(getter_AddRefs(imgContainer));
|
|
|
|
nsIntSize imageSize;
|
|
imgContainer->GetWidth(&imageSize.width);
|
|
imgContainer->GetHeight(&imageSize.height);
|
|
|
|
nsCOMPtr<gfxIImageFrame> imgFrame;
|
|
imgContainer->GetCurrentFrame(getter_AddRefs(imgFrame));
|
|
|
|
nsIntRect innerRect;
|
|
imgFrame->GetRect(innerRect);
|
|
|
|
nsCOMPtr<nsIImage> img(do_GetInterface(imgFrame));
|
|
// The inner rectangle should precisely enclose the image pixels for
|
|
// this frame.
|
|
NS_ASSERTION(innerRect.width == img->GetWidth(), "img inner width off");
|
|
NS_ASSERTION(innerRect.height == img->GetHeight(), "img inner height off");
|
|
|
|
// Convert percentages and clamp values to the image size.
|
|
nsIntMargin split;
|
|
NS_FOR_CSS_SIDES(s) {
|
|
nsStyleCoord coord = aBorderStyle.mBorderImageSplit.Get(s);
|
|
PRInt32 imgDimension = ((s == NS_SIDE_TOP || s == NS_SIDE_BOTTOM)
|
|
? imageSize.height
|
|
: imageSize.width);
|
|
double value;
|
|
switch (coord.GetUnit()) {
|
|
case eStyleUnit_Percent:
|
|
value = coord.GetPercentValue() * imgDimension;
|
|
break;
|
|
case eStyleUnit_Factor:
|
|
value = coord.GetFactorValue();
|
|
break;
|
|
default:
|
|
NS_ASSERTION(coord.GetUnit() == eStyleUnit_Null,
|
|
"unexpected CSS unit for image split");
|
|
value = 0;
|
|
break;
|
|
}
|
|
if (value < 0)
|
|
value = 0;
|
|
if (value > imgDimension)
|
|
value = imgDimension;
|
|
split.side(s) = NS_lround(value);
|
|
}
|
|
|
|
nsMargin border(aBorderStyle.GetActualBorder());
|
|
|
|
// These helper tables recharacterize the 'split' and 'border' margins
|
|
// in a more convenient form: they are the x/y/width/height coords
|
|
// required for various bands of the border, and they have been transformed
|
|
// to be relative to the innerRect (for 'split') or the page (for 'border').
|
|
enum {
|
|
LEFT, MIDDLE, RIGHT,
|
|
TOP = LEFT, BOTTOM = RIGHT
|
|
};
|
|
const nscoord borderX[3] = {
|
|
aBorderArea.x + 0,
|
|
aBorderArea.x + border.left,
|
|
aBorderArea.x + aBorderArea.width - border.right,
|
|
};
|
|
const nscoord borderY[3] = {
|
|
aBorderArea.y + 0,
|
|
aBorderArea.y + border.top,
|
|
aBorderArea.y + aBorderArea.height - border.bottom,
|
|
};
|
|
const nscoord borderWidth[3] = {
|
|
border.left,
|
|
aBorderArea.width - border.left - border.right,
|
|
border.right,
|
|
};
|
|
const nscoord borderHeight[3] = {
|
|
border.top,
|
|
aBorderArea.height - border.top - border.bottom,
|
|
border.bottom,
|
|
};
|
|
|
|
const PRInt32 splitX[3] = {
|
|
-innerRect.x + 0,
|
|
-innerRect.x + split.left,
|
|
-innerRect.x + imageSize.width - split.right,
|
|
};
|
|
const PRInt32 splitY[3] = {
|
|
-innerRect.y + 0,
|
|
-innerRect.y + split.top,
|
|
-innerRect.y + imageSize.height - split.bottom,
|
|
};
|
|
const PRInt32 splitWidth[3] = {
|
|
split.left,
|
|
imageSize.width - split.left - split.right,
|
|
split.right,
|
|
};
|
|
const PRInt32 splitHeight[3] = {
|
|
split.top,
|
|
imageSize.height - split.top - split.bottom,
|
|
split.bottom,
|
|
};
|
|
|
|
// In all the 'factor' calculations below, 'border' measurements are
|
|
// in app units but 'split' measurements are in image/CSS pixels, so
|
|
// the factor corresponding to no additional scaling is
|
|
// CSSPixelsToAppUnits(1), not simply 1.
|
|
for (int i = LEFT; i <= RIGHT; i++) {
|
|
for (int j = TOP; j <= BOTTOM; j++) {
|
|
nsRect destArea(borderX[i], borderY[j], borderWidth[i], borderHeight[j]);
|
|
nsIntRect subArea(splitX[i], splitY[j], splitWidth[i], splitHeight[j]);
|
|
|
|
PRUint8 fillStyleH, fillStyleV;
|
|
nsSize unitSize;
|
|
|
|
if (i == MIDDLE && j == MIDDLE) {
|
|
// css-background:
|
|
// The middle image's width is scaled by the same factor as the
|
|
// top image unless that factor is zero or infinity, in which
|
|
// case the scaling factor of the bottom is substituted, and
|
|
// failing that, the width is not scaled. The height of the
|
|
// middle image is scaled by the same factor as the left image
|
|
// unless that factor is zero or infinity, in which case the
|
|
// scaling factor of the right image is substituted, and failing
|
|
// that, the height is not scaled.
|
|
gfxFloat hFactor, vFactor;
|
|
|
|
if (0 < border.left && 0 < split.left)
|
|
vFactor = gfxFloat(border.left)/split.left;
|
|
else if (0 < border.right && 0 < split.right)
|
|
vFactor = gfxFloat(border.right)/split.right;
|
|
else
|
|
vFactor = nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
if (0 < border.top && 0 < split.top)
|
|
hFactor = gfxFloat(border.top)/split.top;
|
|
else if (0 < border.bottom && 0 < split.bottom)
|
|
hFactor = gfxFloat(border.bottom)/split.bottom;
|
|
else
|
|
hFactor = nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
unitSize.width = splitWidth[i]*hFactor;
|
|
unitSize.height = splitHeight[j]*vFactor;
|
|
fillStyleH = aBorderStyle.mBorderImageHFill;
|
|
fillStyleV = aBorderStyle.mBorderImageVFill;
|
|
|
|
} else if (i == MIDDLE) { // top, bottom
|
|
// Sides are always stretched to the thickness of their border,
|
|
// and stretched proportionately on the other axis.
|
|
gfxFloat factor;
|
|
if (0 < borderHeight[j] && 0 < splitHeight[j])
|
|
factor = gfxFloat(borderHeight[j])/splitHeight[j];
|
|
else
|
|
factor = nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
unitSize.width = splitWidth[i]*factor;
|
|
unitSize.height = borderHeight[j];
|
|
fillStyleH = aBorderStyle.mBorderImageHFill;
|
|
fillStyleV = NS_STYLE_BORDER_IMAGE_STRETCH;
|
|
|
|
} else if (j == MIDDLE) { // left, right
|
|
gfxFloat factor;
|
|
if (0 < borderWidth[i] && 0 < splitWidth[i])
|
|
factor = gfxFloat(borderWidth[i])/splitWidth[i];
|
|
else
|
|
factor = nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
unitSize.width = borderWidth[i];
|
|
unitSize.height = splitHeight[j]*factor;
|
|
fillStyleH = NS_STYLE_BORDER_IMAGE_STRETCH;
|
|
fillStyleV = aBorderStyle.mBorderImageVFill;
|
|
|
|
} else {
|
|
// Corners are always stretched to fit the corner.
|
|
unitSize.width = borderWidth[i];
|
|
unitSize.height = borderHeight[j];
|
|
fillStyleH = NS_STYLE_BORDER_IMAGE_STRETCH;
|
|
fillStyleV = NS_STYLE_BORDER_IMAGE_STRETCH;
|
|
}
|
|
|
|
DrawBorderImageComponent(aRenderingContext, aForFrame,
|
|
img, aDirtyRect,
|
|
destArea, subArea,
|
|
fillStyleH, fillStyleV, unitSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
DrawBorderImageComponent(nsIRenderingContext& aRenderingContext,
|
|
nsIFrame* aForFrame,
|
|
nsIImage* aImage,
|
|
const nsRect& aDirtyRect,
|
|
const nsRect& aFill,
|
|
const nsIntRect& aSrc,
|
|
PRUint8 aHFill,
|
|
PRUint8 aVFill,
|
|
const nsSize& aUnitSize)
|
|
{
|
|
if (aFill.IsEmpty() || aSrc.IsEmpty())
|
|
return;
|
|
|
|
nsCOMPtr<nsIImage> subImage;
|
|
if (NS_FAILED(aImage->Extract(aSrc, getter_AddRefs(subImage))))
|
|
return;
|
|
|
|
gfxPattern::GraphicsFilter graphicsFilter =
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(aForFrame);
|
|
|
|
// If we have no tiling in either direction, we can skip the intermediate
|
|
// scaling step.
|
|
if ((aHFill == NS_STYLE_BORDER_IMAGE_STRETCH &&
|
|
aVFill == NS_STYLE_BORDER_IMAGE_STRETCH) ||
|
|
(aUnitSize.width == aFill.width &&
|
|
aUnitSize.height == aFill.height)) {
|
|
nsLayoutUtils::DrawSingleImage(&aRenderingContext, subImage,
|
|
graphicsFilter,
|
|
aFill, aDirtyRect);
|
|
return;
|
|
}
|
|
|
|
// Compute the scale and position of the master copy of the image.
|
|
nsRect tile;
|
|
switch (aHFill) {
|
|
case NS_STYLE_BORDER_IMAGE_STRETCH:
|
|
tile.x = aFill.x;
|
|
tile.width = aFill.width;
|
|
break;
|
|
case NS_STYLE_BORDER_IMAGE_REPEAT:
|
|
tile.x = aFill.x + aFill.width/2 - aUnitSize.width/2;
|
|
tile.width = aUnitSize.width;
|
|
break;
|
|
|
|
case NS_STYLE_BORDER_IMAGE_ROUND:
|
|
tile.x = aFill.x;
|
|
tile.width = aFill.width / ceil(gfxFloat(aFill.width)/aUnitSize.width);
|
|
break;
|
|
|
|
default:
|
|
NS_NOTREACHED("unrecognized border-image fill style");
|
|
}
|
|
|
|
switch (aVFill) {
|
|
case NS_STYLE_BORDER_IMAGE_STRETCH:
|
|
tile.y = aFill.y;
|
|
tile.height = aFill.height;
|
|
break;
|
|
case NS_STYLE_BORDER_IMAGE_REPEAT:
|
|
tile.y = aFill.y + aFill.height/2 - aUnitSize.height/2;
|
|
tile.height = aUnitSize.height;
|
|
break;
|
|
|
|
case NS_STYLE_BORDER_IMAGE_ROUND:
|
|
tile.y = aFill.y;
|
|
tile.height = aFill.height/ceil(gfxFloat(aFill.height)/aUnitSize.height);
|
|
break;
|
|
|
|
default:
|
|
NS_NOTREACHED("unrecognized border-image fill style");
|
|
}
|
|
|
|
nsLayoutUtils::DrawImage(&aRenderingContext, subImage, graphicsFilter,
|
|
tile, aFill, tile.TopLeft(), aDirtyRect);
|
|
}
|
|
|
|
// Begin table border-collapsing section
|
|
// These functions were written to not disrupt the normal ones and yet satisfy some additional requirements
|
|
// At some point, all functions should be unified to include the additional functionality that these provide
|
|
|
|
static nscoord
|
|
RoundIntToPixel(nscoord aValue,
|
|
nscoord aTwipsPerPixel,
|
|
PRBool aRoundDown = PR_FALSE)
|
|
{
|
|
if (aTwipsPerPixel <= 0)
|
|
// We must be rendering to a device that has a resolution greater than Twips!
|
|
// In that case, aValue is as accurate as it's going to get.
|
|
return aValue;
|
|
|
|
nscoord halfPixel = NSToCoordRound(aTwipsPerPixel / 2.0f);
|
|
nscoord extra = aValue % aTwipsPerPixel;
|
|
nscoord finalValue = (!aRoundDown && (extra >= halfPixel)) ? aValue + (aTwipsPerPixel - extra) : aValue - extra;
|
|
return finalValue;
|
|
}
|
|
|
|
static nscoord
|
|
RoundFloatToPixel(float aValue,
|
|
nscoord aTwipsPerPixel,
|
|
PRBool aRoundDown = PR_FALSE)
|
|
{
|
|
return RoundIntToPixel(NSToCoordRound(aValue), aTwipsPerPixel, aRoundDown);
|
|
}
|
|
|
|
static void
|
|
SetPoly(const nsRect& aRect,
|
|
nsPoint* poly)
|
|
{
|
|
poly[0].x = aRect.x;
|
|
poly[0].y = aRect.y;
|
|
poly[1].x = aRect.x + aRect.width;
|
|
poly[1].y = aRect.y;
|
|
poly[2].x = aRect.x + aRect.width;
|
|
poly[2].y = aRect.y + aRect.height;
|
|
poly[3].x = aRect.x;
|
|
poly[3].y = aRect.y + aRect.height;
|
|
poly[4].x = aRect.x;
|
|
poly[4].y = aRect.y;
|
|
}
|
|
|
|
static void
|
|
DrawSolidBorderSegment(nsIRenderingContext& aContext,
|
|
nsRect aRect,
|
|
nscoord aTwipsPerPixel,
|
|
PRUint8 aStartBevelSide = 0,
|
|
nscoord aStartBevelOffset = 0,
|
|
PRUint8 aEndBevelSide = 0,
|
|
nscoord aEndBevelOffset = 0)
|
|
{
|
|
|
|
if ((aRect.width == aTwipsPerPixel) || (aRect.height == aTwipsPerPixel) ||
|
|
((0 == aStartBevelOffset) && (0 == aEndBevelOffset))) {
|
|
// simple line or rectangle
|
|
if ((NS_SIDE_TOP == aStartBevelSide) || (NS_SIDE_BOTTOM == aStartBevelSide)) {
|
|
if (1 == aRect.height)
|
|
aContext.DrawLine(aRect.x, aRect.y, aRect.x, aRect.y + aRect.height);
|
|
else
|
|
aContext.FillRect(aRect);
|
|
}
|
|
else {
|
|
if (1 == aRect.width)
|
|
aContext.DrawLine(aRect.x, aRect.y, aRect.x + aRect.width, aRect.y);
|
|
else
|
|
aContext.FillRect(aRect);
|
|
}
|
|
}
|
|
else {
|
|
// polygon with beveling
|
|
nsPoint poly[5];
|
|
SetPoly(aRect, poly);
|
|
switch(aStartBevelSide) {
|
|
case NS_SIDE_TOP:
|
|
poly[0].x += aStartBevelOffset;
|
|
poly[4].x = poly[0].x;
|
|
break;
|
|
case NS_SIDE_BOTTOM:
|
|
poly[3].x += aStartBevelOffset;
|
|
break;
|
|
case NS_SIDE_RIGHT:
|
|
poly[1].y += aStartBevelOffset;
|
|
break;
|
|
case NS_SIDE_LEFT:
|
|
poly[0].y += aStartBevelOffset;
|
|
poly[4].y = poly[0].y;
|
|
}
|
|
|
|
switch(aEndBevelSide) {
|
|
case NS_SIDE_TOP:
|
|
poly[1].x -= aEndBevelOffset;
|
|
break;
|
|
case NS_SIDE_BOTTOM:
|
|
poly[2].x -= aEndBevelOffset;
|
|
break;
|
|
case NS_SIDE_RIGHT:
|
|
poly[2].y -= aEndBevelOffset;
|
|
break;
|
|
case NS_SIDE_LEFT:
|
|
poly[3].y -= aEndBevelOffset;
|
|
}
|
|
|
|
aContext.FillPolygon(poly, 5);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
static void
|
|
GetDashInfo(nscoord aBorderLength,
|
|
nscoord aDashLength,
|
|
nscoord aTwipsPerPixel,
|
|
PRInt32& aNumDashSpaces,
|
|
nscoord& aStartDashLength,
|
|
nscoord& aEndDashLength)
|
|
{
|
|
aNumDashSpaces = 0;
|
|
if (aStartDashLength + aDashLength + aEndDashLength >= aBorderLength) {
|
|
aStartDashLength = aBorderLength;
|
|
aEndDashLength = 0;
|
|
}
|
|
else {
|
|
aNumDashSpaces = (aBorderLength - aDashLength)/ (2 * aDashLength); // round down
|
|
nscoord extra = aBorderLength - aStartDashLength - aEndDashLength - (((2 * aNumDashSpaces) - 1) * aDashLength);
|
|
if (extra > 0) {
|
|
nscoord half = RoundIntToPixel(extra / 2, aTwipsPerPixel);
|
|
aStartDashLength += half;
|
|
aEndDashLength += (extra - half);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSRendering::DrawTableBorderSegment(nsIRenderingContext& aContext,
|
|
PRUint8 aBorderStyle,
|
|
nscolor aBorderColor,
|
|
const nsStyleBackground* aBGColor,
|
|
const nsRect& aBorder,
|
|
PRInt32 aAppUnitsPerCSSPixel,
|
|
PRUint8 aStartBevelSide,
|
|
nscoord aStartBevelOffset,
|
|
PRUint8 aEndBevelSide,
|
|
nscoord aEndBevelOffset)
|
|
{
|
|
aContext.SetColor (aBorderColor);
|
|
|
|
PRBool horizontal = ((NS_SIDE_TOP == aStartBevelSide) || (NS_SIDE_BOTTOM == aStartBevelSide));
|
|
nscoord twipsPerPixel = NSIntPixelsToAppUnits(1, aAppUnitsPerCSSPixel);
|
|
PRUint8 ridgeGroove = NS_STYLE_BORDER_STYLE_RIDGE;
|
|
|
|
if ((twipsPerPixel >= aBorder.width) || (twipsPerPixel >= aBorder.height) ||
|
|
(NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) || (NS_STYLE_BORDER_STYLE_DOTTED == aBorderStyle)) {
|
|
// no beveling for 1 pixel border, dash or dot
|
|
aStartBevelOffset = 0;
|
|
aEndBevelOffset = 0;
|
|
}
|
|
|
|
gfxContext *ctx = aContext.ThebesContext();
|
|
gfxContext::AntialiasMode oldMode = ctx->CurrentAntialiasMode();
|
|
ctx->SetAntialiasMode(gfxContext::MODE_ALIASED);
|
|
|
|
switch (aBorderStyle) {
|
|
case NS_STYLE_BORDER_STYLE_NONE:
|
|
case NS_STYLE_BORDER_STYLE_HIDDEN:
|
|
//NS_ASSERTION(PR_FALSE, "style of none or hidden");
|
|
break;
|
|
case NS_STYLE_BORDER_STYLE_DOTTED:
|
|
case NS_STYLE_BORDER_STYLE_DASHED:
|
|
{
|
|
nscoord dashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) ? DASH_LENGTH : DOT_LENGTH;
|
|
// make the dash length proportional to the border thickness
|
|
dashLength *= (horizontal) ? aBorder.height : aBorder.width;
|
|
// make the min dash length for the ends 1/2 the dash length
|
|
nscoord minDashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle)
|
|
? RoundFloatToPixel(((float)dashLength) / 2.0f, twipsPerPixel) : dashLength;
|
|
minDashLength = PR_MAX(minDashLength, twipsPerPixel);
|
|
nscoord numDashSpaces = 0;
|
|
nscoord startDashLength = minDashLength;
|
|
nscoord endDashLength = minDashLength;
|
|
if (horizontal) {
|
|
GetDashInfo(aBorder.width, dashLength, twipsPerPixel, numDashSpaces, startDashLength, endDashLength);
|
|
nsRect rect(aBorder.x, aBorder.y, startDashLength, aBorder.height);
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel);
|
|
for (PRInt32 spaceX = 0; spaceX < numDashSpaces; spaceX++) {
|
|
rect.x += rect.width + dashLength;
|
|
rect.width = (spaceX == (numDashSpaces - 1)) ? endDashLength : dashLength;
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel);
|
|
}
|
|
}
|
|
else {
|
|
GetDashInfo(aBorder.height, dashLength, twipsPerPixel, numDashSpaces, startDashLength, endDashLength);
|
|
nsRect rect(aBorder.x, aBorder.y, aBorder.width, startDashLength);
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel);
|
|
for (PRInt32 spaceY = 0; spaceY < numDashSpaces; spaceY++) {
|
|
rect.y += rect.height + dashLength;
|
|
rect.height = (spaceY == (numDashSpaces - 1)) ? endDashLength : dashLength;
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case NS_STYLE_BORDER_STYLE_GROOVE:
|
|
ridgeGroove = NS_STYLE_BORDER_STYLE_GROOVE; // and fall through to ridge
|
|
case NS_STYLE_BORDER_STYLE_RIDGE:
|
|
if ((horizontal && (twipsPerPixel >= aBorder.height)) ||
|
|
(!horizontal && (twipsPerPixel >= aBorder.width))) {
|
|
// a one pixel border
|
|
DrawSolidBorderSegment(aContext, aBorder, twipsPerPixel, aStartBevelSide, aStartBevelOffset,
|
|
aEndBevelSide, aEndBevelOffset);
|
|
}
|
|
else {
|
|
nscoord startBevel = (aStartBevelOffset > 0)
|
|
? RoundFloatToPixel(0.5f * (float)aStartBevelOffset, twipsPerPixel, PR_TRUE) : 0;
|
|
nscoord endBevel = (aEndBevelOffset > 0)
|
|
? RoundFloatToPixel(0.5f * (float)aEndBevelOffset, twipsPerPixel, PR_TRUE) : 0;
|
|
PRUint8 ridgeGrooveSide = (horizontal) ? NS_SIDE_TOP : NS_SIDE_LEFT;
|
|
aContext.SetColor (
|
|
MakeBevelColor(ridgeGrooveSide, ridgeGroove, aBGColor->mBackgroundColor, aBorderColor));
|
|
nsRect rect(aBorder);
|
|
nscoord half;
|
|
if (horizontal) { // top, bottom
|
|
half = RoundFloatToPixel(0.5f * (float)aBorder.height, twipsPerPixel);
|
|
rect.height = half;
|
|
if (NS_SIDE_TOP == aStartBevelSide) {
|
|
rect.x += startBevel;
|
|
rect.width -= startBevel;
|
|
}
|
|
if (NS_SIDE_TOP == aEndBevelSide) {
|
|
rect.width -= endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
else { // left, right
|
|
half = RoundFloatToPixel(0.5f * (float)aBorder.width, twipsPerPixel);
|
|
rect.width = half;
|
|
if (NS_SIDE_LEFT == aStartBevelSide) {
|
|
rect.y += startBevel;
|
|
rect.height -= startBevel;
|
|
}
|
|
if (NS_SIDE_LEFT == aEndBevelSide) {
|
|
rect.height -= endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
|
|
rect = aBorder;
|
|
ridgeGrooveSide = (NS_SIDE_TOP == ridgeGrooveSide) ? NS_SIDE_BOTTOM : NS_SIDE_RIGHT;
|
|
aContext.SetColor (
|
|
MakeBevelColor(ridgeGrooveSide, ridgeGroove, aBGColor->mBackgroundColor, aBorderColor));
|
|
if (horizontal) {
|
|
rect.y = rect.y + half;
|
|
rect.height = aBorder.height - half;
|
|
if (NS_SIDE_BOTTOM == aStartBevelSide) {
|
|
rect.x += startBevel;
|
|
rect.width -= startBevel;
|
|
}
|
|
if (NS_SIDE_BOTTOM == aEndBevelSide) {
|
|
rect.width -= endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
else {
|
|
rect.x = rect.x + half;
|
|
rect.width = aBorder.width - half;
|
|
if (NS_SIDE_RIGHT == aStartBevelSide) {
|
|
rect.y += aStartBevelOffset - startBevel;
|
|
rect.height -= startBevel;
|
|
}
|
|
if (NS_SIDE_RIGHT == aEndBevelSide) {
|
|
rect.height -= endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, rect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
}
|
|
break;
|
|
case NS_STYLE_BORDER_STYLE_DOUBLE:
|
|
if ((aBorder.width > 2) && (aBorder.height > 2)) {
|
|
nscoord startBevel = (aStartBevelOffset > 0)
|
|
? RoundFloatToPixel(0.333333f * (float)aStartBevelOffset, twipsPerPixel) : 0;
|
|
nscoord endBevel = (aEndBevelOffset > 0)
|
|
? RoundFloatToPixel(0.333333f * (float)aEndBevelOffset, twipsPerPixel) : 0;
|
|
if (horizontal) { // top, bottom
|
|
nscoord thirdHeight = RoundFloatToPixel(0.333333f * (float)aBorder.height, twipsPerPixel);
|
|
|
|
// draw the top line or rect
|
|
nsRect topRect(aBorder.x, aBorder.y, aBorder.width, thirdHeight);
|
|
if (NS_SIDE_TOP == aStartBevelSide) {
|
|
topRect.x += aStartBevelOffset - startBevel;
|
|
topRect.width -= aStartBevelOffset - startBevel;
|
|
}
|
|
if (NS_SIDE_TOP == aEndBevelSide) {
|
|
topRect.width -= aEndBevelOffset - endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, topRect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
|
|
// draw the botom line or rect
|
|
nscoord heightOffset = aBorder.height - thirdHeight;
|
|
nsRect bottomRect(aBorder.x, aBorder.y + heightOffset, aBorder.width, aBorder.height - heightOffset);
|
|
if (NS_SIDE_BOTTOM == aStartBevelSide) {
|
|
bottomRect.x += aStartBevelOffset - startBevel;
|
|
bottomRect.width -= aStartBevelOffset - startBevel;
|
|
}
|
|
if (NS_SIDE_BOTTOM == aEndBevelSide) {
|
|
bottomRect.width -= aEndBevelOffset - endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, bottomRect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
else { // left, right
|
|
nscoord thirdWidth = RoundFloatToPixel(0.333333f * (float)aBorder.width, twipsPerPixel);
|
|
|
|
nsRect leftRect(aBorder.x, aBorder.y, thirdWidth, aBorder.height);
|
|
if (NS_SIDE_LEFT == aStartBevelSide) {
|
|
leftRect.y += aStartBevelOffset - startBevel;
|
|
leftRect.height -= aStartBevelOffset - startBevel;
|
|
}
|
|
if (NS_SIDE_LEFT == aEndBevelSide) {
|
|
leftRect.height -= aEndBevelOffset - endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, leftRect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
|
|
nscoord widthOffset = aBorder.width - thirdWidth;
|
|
nsRect rightRect(aBorder.x + widthOffset, aBorder.y, aBorder.width - widthOffset, aBorder.height);
|
|
if (NS_SIDE_RIGHT == aStartBevelSide) {
|
|
rightRect.y += aStartBevelOffset - startBevel;
|
|
rightRect.height -= aStartBevelOffset - startBevel;
|
|
}
|
|
if (NS_SIDE_RIGHT == aEndBevelSide) {
|
|
rightRect.height -= aEndBevelOffset - endBevel;
|
|
}
|
|
DrawSolidBorderSegment(aContext, rightRect, twipsPerPixel, aStartBevelSide,
|
|
startBevel, aEndBevelSide, endBevel);
|
|
}
|
|
break;
|
|
}
|
|
// else fall through to solid
|
|
case NS_STYLE_BORDER_STYLE_SOLID:
|
|
DrawSolidBorderSegment(aContext, aBorder, twipsPerPixel, aStartBevelSide,
|
|
aStartBevelOffset, aEndBevelSide, aEndBevelOffset);
|
|
break;
|
|
case NS_STYLE_BORDER_STYLE_OUTSET:
|
|
case NS_STYLE_BORDER_STYLE_INSET:
|
|
NS_ASSERTION(PR_FALSE, "inset, outset should have been converted to groove, ridge");
|
|
break;
|
|
case NS_STYLE_BORDER_STYLE_AUTO:
|
|
NS_ASSERTION(PR_FALSE, "Unexpected 'auto' table border");
|
|
break;
|
|
}
|
|
|
|
ctx->SetAntialiasMode(oldMode);
|
|
}
|
|
|
|
// End table border-collapsing section
|
|
|
|
void
|
|
nsCSSRendering::PaintDecorationLine(gfxContext* aGfxContext,
|
|
const nscolor aColor,
|
|
const gfxPoint& aPt,
|
|
const gfxSize& aLineSize,
|
|
const gfxFloat aAscent,
|
|
const gfxFloat aOffset,
|
|
const PRUint8 aDecoration,
|
|
const PRUint8 aStyle,
|
|
const gfxFloat aDescentLimit)
|
|
{
|
|
NS_ASSERTION(aStyle != DECORATION_STYLE_NONE, "aStyle is none");
|
|
|
|
gfxRect rect =
|
|
GetTextDecorationRectInternal(aPt, aLineSize, aAscent, aOffset,
|
|
aDecoration, aStyle, aDescentLimit);
|
|
if (rect.IsEmpty())
|
|
return;
|
|
|
|
if (aDecoration != NS_STYLE_TEXT_DECORATION_UNDERLINE &&
|
|
aDecoration != NS_STYLE_TEXT_DECORATION_OVERLINE &&
|
|
aDecoration != NS_STYLE_TEXT_DECORATION_LINE_THROUGH)
|
|
{
|
|
NS_ERROR("Invalid decoration value!");
|
|
return;
|
|
}
|
|
|
|
gfxFloat lineHeight = PR_MAX(NS_round(aLineSize.height), 1.0);
|
|
PRBool contextIsSaved = PR_FALSE;
|
|
|
|
gfxFloat oldLineWidth;
|
|
nsRefPtr<gfxPattern> oldPattern;
|
|
|
|
switch (aStyle) {
|
|
case DECORATION_STYLE_SOLID:
|
|
case DECORATION_STYLE_DOUBLE:
|
|
oldLineWidth = aGfxContext->CurrentLineWidth();
|
|
oldPattern = aGfxContext->GetPattern();
|
|
break;
|
|
case DECORATION_STYLE_DASHED: {
|
|
aGfxContext->Save();
|
|
contextIsSaved = PR_TRUE;
|
|
aGfxContext->Clip(rect);
|
|
gfxFloat dashWidth = lineHeight * DOT_LENGTH * DASH_LENGTH;
|
|
gfxFloat dash[2] = { dashWidth, dashWidth };
|
|
aGfxContext->SetLineCap(gfxContext::LINE_CAP_BUTT);
|
|
aGfxContext->SetDash(dash, 2, 0.0);
|
|
// We should continue to draw the last dash even if it is not in the rect.
|
|
rect.size.width += dashWidth;
|
|
break;
|
|
}
|
|
case DECORATION_STYLE_DOTTED: {
|
|
aGfxContext->Save();
|
|
contextIsSaved = PR_TRUE;
|
|
aGfxContext->Clip(rect);
|
|
gfxFloat dashWidth = lineHeight * DOT_LENGTH;
|
|
gfxFloat dash[2];
|
|
if (lineHeight > 2.0) {
|
|
dash[0] = 0.0;
|
|
dash[1] = dashWidth * 2.0;
|
|
aGfxContext->SetLineCap(gfxContext::LINE_CAP_ROUND);
|
|
} else {
|
|
dash[0] = dashWidth;
|
|
dash[1] = dashWidth;
|
|
}
|
|
aGfxContext->SetDash(dash, 2, 0.0);
|
|
// We should continue to draw the last dot even if it is not in the rect.
|
|
rect.size.width += dashWidth;
|
|
break;
|
|
}
|
|
case DECORATION_STYLE_WAVY:
|
|
aGfxContext->Save();
|
|
contextIsSaved = PR_TRUE;
|
|
aGfxContext->Clip(rect);
|
|
if (lineHeight > 2.0) {
|
|
aGfxContext->SetAntialiasMode(gfxContext::MODE_COVERAGE);
|
|
} else {
|
|
// Don't use anti-aliasing here. Because looks like lighter color wavy
|
|
// line at this case. And probably, users don't think the
|
|
// non-anti-aliased wavy line is not pretty.
|
|
aGfxContext->SetAntialiasMode(gfxContext::MODE_ALIASED);
|
|
}
|
|
break;
|
|
default:
|
|
NS_ERROR("Invalid style value!");
|
|
return;
|
|
}
|
|
|
|
// The y position should be set to the middle of the line.
|
|
rect.pos.y += lineHeight / 2;
|
|
|
|
aGfxContext->SetColor(gfxRGBA(aColor));
|
|
aGfxContext->SetLineWidth(lineHeight);
|
|
switch (aStyle) {
|
|
case DECORATION_STYLE_SOLID:
|
|
aGfxContext->NewPath();
|
|
aGfxContext->MoveTo(rect.TopLeft());
|
|
aGfxContext->LineTo(rect.TopRight());
|
|
aGfxContext->Stroke();
|
|
break;
|
|
case DECORATION_STYLE_DOUBLE:
|
|
/**
|
|
* We are drawing double line as:
|
|
*
|
|
* +-------------------------------------------+
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineHeight
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
|
* | |
|
|
* | |
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineHeight
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
|
* +-------------------------------------------+
|
|
*/
|
|
aGfxContext->NewPath();
|
|
aGfxContext->MoveTo(rect.TopLeft());
|
|
aGfxContext->LineTo(rect.TopRight());
|
|
rect.size.height -= lineHeight;
|
|
aGfxContext->MoveTo(rect.BottomLeft());
|
|
aGfxContext->LineTo(rect.BottomRight());
|
|
aGfxContext->Stroke();
|
|
break;
|
|
case DECORATION_STYLE_DOTTED:
|
|
case DECORATION_STYLE_DASHED:
|
|
aGfxContext->NewPath();
|
|
aGfxContext->MoveTo(rect.TopLeft());
|
|
aGfxContext->LineTo(rect.TopRight());
|
|
aGfxContext->Stroke();
|
|
break;
|
|
case DECORATION_STYLE_WAVY: {
|
|
/**
|
|
* We are drawing wavy line as:
|
|
*
|
|
* P: Path, X: Painted pixel
|
|
*
|
|
* +---------------------------------------+
|
|
* XX|X XXXXXX XXXXXX |
|
|
* PP|PX XPPPPPPX XPPPPPPX | ^
|
|
* XX|XPX XPXXXXXXPX XPXXXXXXPX| |
|
|
* | XPX XPX XPX XPX XP|X |adv
|
|
* | XPXXXXXXPX XPXXXXXXPX X|PX |
|
|
* | XPPPPPPX XPPPPPPX |XPX v
|
|
* | XXXXXX XXXXXX | XX
|
|
* +---------------------------------------+
|
|
* <---><---> ^
|
|
* adv flatLengthAtVertex rightMost
|
|
*
|
|
* 1. Always starts from top-left of the drawing area, however, we need
|
|
* to draw the line from outside of the rect. Because the start
|
|
* point of the line is not good style if we draw from inside it.
|
|
* 2. First, draw horizontal line from outside the rect to top-left of
|
|
* the rect;
|
|
* 3. Goes down to bottom of the area at 45 degrees.
|
|
* 4. Slides to right horizontaly, see |flatLengthAtVertex|.
|
|
* 5. Goes up to top of the area at 45 degrees.
|
|
* 6. Slides to right horizontaly.
|
|
* 7. Repeat from 2 until reached to right-most edge of the area.
|
|
*/
|
|
|
|
rect.pos.x += lineHeight / 2.0;
|
|
aGfxContext->NewPath();
|
|
|
|
gfxPoint pt(rect.pos);
|
|
gfxFloat rightMost = pt.x + rect.Width() + lineHeight;
|
|
gfxFloat adv = rect.Height() - lineHeight;
|
|
gfxFloat flatLengthAtVertex = PR_MAX((lineHeight - 1.0) * 2.0, 1.0);
|
|
|
|
pt.x -= lineHeight;
|
|
aGfxContext->MoveTo(pt); // 1
|
|
|
|
pt.x = rect.pos.x;
|
|
aGfxContext->LineTo(pt); // 2
|
|
|
|
PRBool goDown = PR_TRUE;
|
|
while (pt.x < rightMost) {
|
|
pt.x += adv;
|
|
pt.y += goDown ? adv : -adv;
|
|
|
|
aGfxContext->LineTo(pt); // 3 and 5
|
|
|
|
pt.x += flatLengthAtVertex;
|
|
aGfxContext->LineTo(pt); // 4 and 6
|
|
|
|
goDown = !goDown;
|
|
}
|
|
aGfxContext->Stroke();
|
|
break;
|
|
}
|
|
default:
|
|
NS_ERROR("Invalid style value!");
|
|
break;
|
|
}
|
|
|
|
if (contextIsSaved) {
|
|
aGfxContext->Restore();
|
|
} else {
|
|
aGfxContext->SetPattern(oldPattern);
|
|
aGfxContext->SetLineWidth(oldLineWidth);
|
|
}
|
|
}
|
|
|
|
nsRect
|
|
nsCSSRendering::GetTextDecorationRect(nsPresContext* aPresContext,
|
|
const gfxSize& aLineSize,
|
|
const gfxFloat aAscent,
|
|
const gfxFloat aOffset,
|
|
const PRUint8 aDecoration,
|
|
const PRUint8 aStyle,
|
|
const gfxFloat aDescentLimit)
|
|
{
|
|
NS_ASSERTION(aPresContext, "aPresContext is null");
|
|
NS_ASSERTION(aStyle != DECORATION_STYLE_NONE, "aStyle is none");
|
|
|
|
gfxRect rect =
|
|
GetTextDecorationRectInternal(gfxPoint(0, 0), aLineSize, aAscent, aOffset,
|
|
aDecoration, aStyle, aDescentLimit);
|
|
// The rect values are already rounded to nearest device pixels.
|
|
nsRect r;
|
|
r.x = aPresContext->GfxUnitsToAppUnits(rect.X());
|
|
r.y = aPresContext->GfxUnitsToAppUnits(rect.Y());
|
|
r.width = aPresContext->GfxUnitsToAppUnits(rect.Width());
|
|
r.height = aPresContext->GfxUnitsToAppUnits(rect.Height());
|
|
return r;
|
|
}
|
|
|
|
gfxRect
|
|
nsCSSRendering::GetTextDecorationRectInternal(const gfxPoint& aPt,
|
|
const gfxSize& aLineSize,
|
|
const gfxFloat aAscent,
|
|
const gfxFloat aOffset,
|
|
const PRUint8 aDecoration,
|
|
const PRUint8 aStyle,
|
|
const gfxFloat aDescentLimit)
|
|
{
|
|
NS_ASSERTION(aStyle <= DECORATION_STYLE_WAVY, "Invalid aStyle value");
|
|
|
|
if (aStyle == DECORATION_STYLE_NONE)
|
|
return gfxRect(0, 0, 0, 0);
|
|
|
|
PRBool canLiftUnderline = aDescentLimit >= 0.0;
|
|
|
|
gfxRect r;
|
|
r.pos.x = NS_floor(aPt.x + 0.5);
|
|
r.size.width = NS_round(aLineSize.width);
|
|
|
|
gfxFloat lineHeight = NS_round(aLineSize.height);
|
|
lineHeight = PR_MAX(lineHeight, 1.0);
|
|
|
|
gfxFloat ascent = NS_round(aAscent);
|
|
gfxFloat descentLimit = NS_round(aDescentLimit);
|
|
|
|
gfxFloat suggestedMaxRectHeight = PR_MAX(PR_MIN(ascent, descentLimit), 1.0);
|
|
gfxFloat underlineOffsetAdjust = 0.0;
|
|
r.size.height = lineHeight;
|
|
if (aStyle == DECORATION_STYLE_DOUBLE) {
|
|
/**
|
|
* We will draw double line as:
|
|
*
|
|
* +-------------------------------------------+
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineHeight
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
|
* | | ^
|
|
* | | | gap
|
|
* | | v
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineHeight
|
|
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
|
* +-------------------------------------------+
|
|
*/
|
|
gfxFloat gap = NS_round(lineHeight / 2.0);
|
|
gap = PR_MAX(gap, 1.0);
|
|
r.size.height = lineHeight * 2.0 + gap;
|
|
if (canLiftUnderline) {
|
|
if (r.Height() > suggestedMaxRectHeight) {
|
|
// Don't shrink the line height, because the thickness has some meaning.
|
|
// We can just shrink the gap at this time.
|
|
r.size.height = PR_MAX(suggestedMaxRectHeight, lineHeight * 2.0 + 1.0);
|
|
}
|
|
}
|
|
} else if (aStyle == DECORATION_STYLE_WAVY) {
|
|
/**
|
|
* We will draw wavy line as:
|
|
*
|
|
* +-------------------------------------------+
|
|
* |XXXXX XXXXXX XXXXXX | ^
|
|
* |XXXXXX XXXXXXXX XXXXXXXX | | lineHeight
|
|
* |XXXXXXX XXXXXXXXXX XXXXXXXXXX| v
|
|
* | XXX XXX XXX XXX XX|
|
|
* | XXXXXXXXXX XXXXXXXXXX X|
|
|
* | XXXXXXXX XXXXXXXX |
|
|
* | XXXXXX XXXXXX |
|
|
* +-------------------------------------------+
|
|
*/
|
|
r.size.height = lineHeight > 2.0 ? lineHeight * 4.0 : lineHeight * 3.0;
|
|
if (canLiftUnderline) {
|
|
// Wavy line's top edge can overlap to the baseline, because even if the
|
|
// wavy line overlaps the baseline of the text, that shouldn't cause
|
|
// unreadability.
|
|
descentLimit += lineHeight;
|
|
// Recompute suggestedMaxRectHeight with new descentLimit value.
|
|
suggestedMaxRectHeight = PR_MAX(PR_MIN(ascent, descentLimit), 1.0);
|
|
if (r.Height() > suggestedMaxRectHeight) {
|
|
// Don't shrink the line height even if there is not enough space,
|
|
// because the thickness has some meaning. E.g., the 1px wavy line and
|
|
// 2px wavy line can be used for different meaning in IME selections
|
|
// at same time.
|
|
r.size.height = PR_MAX(suggestedMaxRectHeight, lineHeight * 2.0);
|
|
}
|
|
}
|
|
// If this is underline, the middle of the rect should be aligned to the
|
|
// specified underline offset. So, wavy line's top edge can overlap to
|
|
// baseline. Because even if the wavy line overlaps the baseline of the
|
|
// text, that shouldn't cause unreadability.
|
|
underlineOffsetAdjust = r.Height() / 2.0;
|
|
}
|
|
|
|
gfxFloat baseline = NS_floor(aPt.y + aAscent + 0.5);
|
|
gfxFloat offset = 0.0;
|
|
switch (aDecoration) {
|
|
case NS_STYLE_TEXT_DECORATION_UNDERLINE:
|
|
offset = aOffset + underlineOffsetAdjust;
|
|
if (canLiftUnderline) {
|
|
if (descentLimit < -offset + r.Height()) {
|
|
// If we can ignore the offset and the decoration line is overflowing,
|
|
// we should align the bottom edge of the decoration line rect if it's
|
|
// possible. Otherwise, we should lift up the top edge of the rect as
|
|
// far as possible.
|
|
gfxFloat offsetBottomAligned = -descentLimit + r.Height();
|
|
gfxFloat offsetTopAligned = underlineOffsetAdjust;
|
|
offset = PR_MIN(offsetBottomAligned, offsetTopAligned);
|
|
}
|
|
}
|
|
break;
|
|
case NS_STYLE_TEXT_DECORATION_OVERLINE:
|
|
offset = aOffset - lineHeight + r.Height();
|
|
break;
|
|
case NS_STYLE_TEXT_DECORATION_LINE_THROUGH: {
|
|
gfxFloat extra = NS_floor(r.Height() / 2.0 + 0.5);
|
|
extra = PR_MAX(extra, lineHeight);
|
|
offset = aOffset - lineHeight + extra;
|
|
break;
|
|
}
|
|
default:
|
|
NS_ERROR("Invalid decoration value!");
|
|
}
|
|
r.pos.y = baseline - NS_floor(offset + 0.5);
|
|
return r;
|
|
}
|
|
|
|
// -----
|
|
// nsContextBoxBlur
|
|
// -----
|
|
gfxContext*
|
|
nsContextBoxBlur::Init(const gfxRect& aRect, nscoord aBlurRadius,
|
|
PRInt32 aAppUnitsPerDevPixel,
|
|
gfxContext* aDestinationCtx,
|
|
const gfxRect& aDirtyRect)
|
|
{
|
|
mDestinationCtx = aDestinationCtx;
|
|
|
|
PRInt32 blurRadius = static_cast<PRInt32>(aBlurRadius / aAppUnitsPerDevPixel);
|
|
|
|
// if not blurring, draw directly onto the destination device
|
|
if (blurRadius <= 0) {
|
|
mContext = aDestinationCtx;
|
|
return mContext;
|
|
}
|
|
|
|
// Convert from app units to device pixels
|
|
gfxRect rect = aRect;
|
|
rect.ScaleInverse(aAppUnitsPerDevPixel);
|
|
|
|
if (rect.IsEmpty()) {
|
|
mContext = aDestinationCtx;
|
|
return mContext;
|
|
}
|
|
|
|
gfxRect dirtyRect = aDirtyRect;
|
|
dirtyRect.ScaleInverse(aAppUnitsPerDevPixel);
|
|
|
|
mDestinationCtx = aDestinationCtx;
|
|
|
|
// Create the temporary surface for blurring
|
|
mContext = blur.Init(rect, gfxIntSize(blurRadius, blurRadius), &dirtyRect);
|
|
return mContext;
|
|
}
|
|
|
|
void
|
|
nsContextBoxBlur::DoPaint()
|
|
{
|
|
if (mContext == mDestinationCtx)
|
|
return;
|
|
|
|
blur.Paint(mDestinationCtx);
|
|
}
|
|
|
|
gfxContext*
|
|
nsContextBoxBlur::GetContext()
|
|
{
|
|
return mContext;
|
|
}
|
|
|