mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
22c2e93774
When flattening the display list, the last child frame in a scroll layer is used to retain the associated ThebesLayer. Instead, use the first child, which tends to be more stable. This fixes retaining layers when scrolling through engadget.com. Fix by Robert O'Callahan <robert@ocallahan.org>
3104 lines
111 KiB
C++
3104 lines
111 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: set ts=2 sw=2 et tw=78:
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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 Novell code.
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*
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* The Initial Developer of the Original Code is Novell Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* robert@ocallahan.org
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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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*/
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/*
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* structures that represent things to be painted (ordered in z-order),
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* used during painting and hit testing
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*/
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#include "nsDisplayList.h"
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#include "nsCSSRendering.h"
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#include "nsRenderingContext.h"
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#include "nsISelectionController.h"
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#include "nsIPresShell.h"
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#include "nsRegion.h"
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#include "nsFrameManager.h"
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#include "gfxContext.h"
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#include "nsStyleStructInlines.h"
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#include "nsStyleTransformMatrix.h"
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#include "gfxMatrix.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsIScrollableFrame.h"
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#include "nsThemeConstants.h"
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#include "imgIContainer.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "BasicLayers.h"
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#include "nsBoxFrame.h"
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#include "nsViewportFrame.h"
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#include "nsSVGEffects.h"
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#include "nsSVGClipPathFrame.h"
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using namespace mozilla;
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using namespace mozilla::layers;
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typedef FrameMetrics::ViewID ViewID;
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nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame,
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Mode aMode, bool aBuildCaret)
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: mReferenceFrame(aReferenceFrame),
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mIgnoreScrollFrame(nsnull),
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mCurrentTableItem(nsnull),
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mFinalTransparentRegion(nsnull),
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mMode(aMode),
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mBuildCaret(aBuildCaret),
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mIgnoreSuppression(false),
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mHadToIgnoreSuppression(false),
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mIsAtRootOfPseudoStackingContext(false),
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mIncludeAllOutOfFlows(false),
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mSelectedFramesOnly(false),
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mAccurateVisibleRegions(false),
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mInTransform(false),
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mSyncDecodeImages(false),
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mIsPaintingToWindow(false),
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mSnappingEnabled(mMode != EVENT_DELIVERY),
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mHasDisplayPort(false),
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mHasFixedItems(false)
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{
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MOZ_COUNT_CTOR(nsDisplayListBuilder);
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PL_InitArenaPool(&mPool, "displayListArena", 1024,
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NS_MAX(NS_ALIGNMENT_OF(void*),NS_ALIGNMENT_OF(double))-1);
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nsPresContext* pc = aReferenceFrame->PresContext();
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nsIPresShell *shell = pc->PresShell();
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if (pc->IsRenderingOnlySelection()) {
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nsCOMPtr<nsISelectionController> selcon(do_QueryInterface(shell));
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if (selcon) {
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selcon->GetSelection(nsISelectionController::SELECTION_NORMAL,
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getter_AddRefs(mBoundingSelection));
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}
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}
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if(mReferenceFrame->GetType() == nsGkAtoms::viewportFrame) {
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ViewportFrame* viewportFrame = static_cast<ViewportFrame*>(mReferenceFrame);
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if (!viewportFrame->GetChildList(nsIFrame::kFixedList).IsEmpty()) {
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mHasFixedItems = true;
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}
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}
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LayerBuilder()->Init(this);
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PR_STATIC_ASSERT(nsDisplayItem::TYPE_MAX < (1 << nsDisplayItem::TYPE_BITS));
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}
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static void MarkFrameForDisplay(nsIFrame* aFrame, nsIFrame* aStopAtFrame) {
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nsFrameManager* frameManager = aFrame->PresContext()->PresShell()->FrameManager();
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for (nsIFrame* f = aFrame; f;
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f = nsLayoutUtils::GetParentOrPlaceholderFor(frameManager, f)) {
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if (f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)
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return;
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f->AddStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
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if (f == aStopAtFrame) {
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// we've reached a frame that we know will be painted, so we can stop.
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break;
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}
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}
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}
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static bool IsFixedFrame(nsIFrame* aFrame)
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{
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return aFrame && aFrame->GetParent() && !aFrame->GetParent()->GetParent();
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}
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static bool IsFixedItem(nsDisplayItem *aItem, nsDisplayListBuilder* aBuilder)
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{
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nsIFrame* activeScrolledRoot =
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nsLayoutUtils::GetActiveScrolledRootFor(aItem, aBuilder);
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return activeScrolledRoot &&
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!nsLayoutUtils::ScrolledByViewportScrolling(activeScrolledRoot,
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aBuilder);
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}
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static bool ForceVisiblityForFixedItem(nsDisplayListBuilder* aBuilder,
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nsDisplayItem* aItem)
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{
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return aBuilder->GetDisplayPort() && aBuilder->GetHasFixedItems() &&
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IsFixedItem(aItem, aBuilder);
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}
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void nsDisplayListBuilder::SetDisplayPort(const nsRect& aDisplayPort)
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{
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static bool fixedPositionLayersEnabled = getenv("MOZ_ENABLE_FIXED_POSITION_LAYERS") != 0;
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if (fixedPositionLayersEnabled) {
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mHasDisplayPort = true;
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mDisplayPort = aDisplayPort;
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}
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}
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void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame,
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nsIFrame* aFrame,
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const nsRect& aDirtyRect)
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{
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nsRect dirty = aDirtyRect - aFrame->GetOffsetTo(aDirtyFrame);
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nsRect overflowRect = aFrame->GetVisualOverflowRect();
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if (mHasDisplayPort && IsFixedFrame(aFrame)) {
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dirty = overflowRect;
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}
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if (!dirty.IntersectRect(dirty, overflowRect))
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return;
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aFrame->Properties().Set(nsDisplayListBuilder::OutOfFlowDirtyRectProperty(),
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new nsRect(dirty));
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MarkFrameForDisplay(aFrame, aDirtyFrame);
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}
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static void UnmarkFrameForDisplay(nsIFrame* aFrame) {
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nsPresContext* presContext = aFrame->PresContext();
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presContext->PropertyTable()->
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Delete(aFrame, nsDisplayListBuilder::OutOfFlowDirtyRectProperty());
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nsFrameManager* frameManager = presContext->PresShell()->FrameManager();
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for (nsIFrame* f = aFrame; f;
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f = nsLayoutUtils::GetParentOrPlaceholderFor(frameManager, f)) {
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if (!(f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO))
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return;
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f->RemoveStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
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}
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}
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static void RecordFrameMetrics(nsIFrame* aForFrame,
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nsIFrame* aScrollFrame,
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ContainerLayer* aRoot,
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const nsRect& aVisibleRect,
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const nsRect& aViewport,
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nsRect* aDisplayPort,
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ViewID aScrollId,
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const nsDisplayItem::ContainerParameters& aContainerParameters) {
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nsPresContext* presContext = aForFrame->PresContext();
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PRInt32 auPerDevPixel = presContext->AppUnitsPerDevPixel();
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nsIntRect visible = aVisibleRect.ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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aRoot->SetVisibleRegion(nsIntRegion(visible));
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FrameMetrics metrics;
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metrics.mViewport = aViewport.ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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if (aDisplayPort) {
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metrics.mDisplayPort = aDisplayPort->ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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}
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nsIScrollableFrame* scrollableFrame = nsnull;
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if (aScrollFrame)
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scrollableFrame = aScrollFrame->GetScrollTargetFrame();
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if (scrollableFrame) {
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nsSize contentSize =
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scrollableFrame->GetScrollRange().Size() +
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scrollableFrame->GetScrollPortRect().Size();
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metrics.mContentSize = contentSize.ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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metrics.mViewportScrollOffset = scrollableFrame->GetScrollPosition().ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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}
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else {
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nsSize contentSize = aForFrame->GetSize();
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metrics.mContentSize = contentSize.ScaleToNearestPixels(
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aContainerParameters.mXScale, aContainerParameters.mYScale, auPerDevPixel);
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}
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metrics.mScrollId = aScrollId;
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aRoot->SetFrameMetrics(metrics);
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}
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nsDisplayListBuilder::~nsDisplayListBuilder() {
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NS_ASSERTION(mFramesMarkedForDisplay.Length() == 0,
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"All frames should have been unmarked");
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NS_ASSERTION(mPresShellStates.Length() == 0,
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"All presshells should have been exited");
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NS_ASSERTION(!mCurrentTableItem, "No table item should be active");
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PL_FreeArenaPool(&mPool);
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PL_FinishArenaPool(&mPool);
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MOZ_COUNT_DTOR(nsDisplayListBuilder);
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}
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PRUint32
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nsDisplayListBuilder::GetBackgroundPaintFlags() {
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PRUint32 flags = 0;
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if (mSyncDecodeImages) {
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flags |= nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES;
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}
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if (mIsPaintingToWindow) {
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flags |= nsCSSRendering::PAINTBG_TO_WINDOW;
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}
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return flags;
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}
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static PRUint64 RegionArea(const nsRegion& aRegion)
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{
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PRUint64 area = 0;
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nsRegionRectIterator iter(aRegion);
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const nsRect* r;
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while ((r = iter.Next()) != nsnull) {
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area += PRUint64(r->width)*r->height;
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}
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return area;
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}
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void
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nsDisplayListBuilder::SubtractFromVisibleRegion(nsRegion* aVisibleRegion,
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const nsRegion& aRegion)
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{
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if (aRegion.IsEmpty())
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return;
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nsRegion tmp;
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tmp.Sub(*aVisibleRegion, aRegion);
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// Don't let *aVisibleRegion get too complex, but don't let it fluff out
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// to its bounds either, which can be very bad (see bug 516740).
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// Do let aVisibleRegion get more complex if by doing so we reduce its
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// area by at least half.
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if (GetAccurateVisibleRegions() || tmp.GetNumRects() <= 15 ||
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RegionArea(tmp) <= RegionArea(*aVisibleRegion)/2) {
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*aVisibleRegion = tmp;
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}
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}
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nsCaret *
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nsDisplayListBuilder::GetCaret() {
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nsRefPtr<nsCaret> caret = CurrentPresShellState()->mPresShell->GetCaret();
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return caret;
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}
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void
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nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
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const nsRect& aDirtyRect) {
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PresShellState* state = mPresShellStates.AppendElement();
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if (!state)
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return;
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state->mPresShell = aReferenceFrame->PresContext()->PresShell();
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state->mCaretFrame = nsnull;
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state->mFirstFrameMarkedForDisplay = mFramesMarkedForDisplay.Length();
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state->mPresShell->UpdateCanvasBackground();
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if (mIsPaintingToWindow) {
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mReferenceFrame->AddPaintedPresShell(state->mPresShell);
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state->mPresShell->IncrementPaintCount();
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}
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bool buildCaret = mBuildCaret;
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if (mIgnoreSuppression || !state->mPresShell->IsPaintingSuppressed()) {
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if (state->mPresShell->IsPaintingSuppressed()) {
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mHadToIgnoreSuppression = true;
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}
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state->mIsBackgroundOnly = false;
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} else {
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state->mIsBackgroundOnly = true;
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buildCaret = false;
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}
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if (!buildCaret)
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return;
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nsRefPtr<nsCaret> caret = state->mPresShell->GetCaret();
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state->mCaretFrame = caret->GetCaretFrame();
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if (state->mCaretFrame) {
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// Check if the dirty rect intersects with the caret's dirty rect.
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nsRect caretRect =
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caret->GetCaretRect() + state->mCaretFrame->GetOffsetTo(aReferenceFrame);
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if (caretRect.Intersects(aDirtyRect)) {
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// Okay, our rects intersect, let's mark the frame and all of its ancestors.
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mFramesMarkedForDisplay.AppendElement(state->mCaretFrame);
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MarkFrameForDisplay(state->mCaretFrame, nsnull);
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}
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}
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}
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void
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nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame,
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const nsRect& aDirtyRect) {
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if (CurrentPresShellState()->mPresShell != aReferenceFrame->PresContext()->PresShell()) {
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// Must have not allocated a state for this presshell, presumably due
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// to OOM.
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return;
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}
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// Unmark and pop off the frames marked for display in this pres shell.
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PRUint32 firstFrameForShell = CurrentPresShellState()->mFirstFrameMarkedForDisplay;
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for (PRUint32 i = firstFrameForShell;
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i < mFramesMarkedForDisplay.Length(); ++i) {
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UnmarkFrameForDisplay(mFramesMarkedForDisplay[i]);
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}
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mFramesMarkedForDisplay.SetLength(firstFrameForShell);
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mPresShellStates.SetLength(mPresShellStates.Length() - 1);
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}
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void
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nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
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const nsFrameList& aFrames,
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const nsRect& aDirtyRect) {
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for (nsFrameList::Enumerator e(aFrames); !e.AtEnd(); e.Next()) {
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mFramesMarkedForDisplay.AppendElement(e.get());
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MarkOutOfFlowFrameForDisplay(aDirtyFrame, e.get(), aDirtyRect);
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}
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}
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void*
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nsDisplayListBuilder::Allocate(size_t aSize) {
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void *tmp;
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PL_ARENA_ALLOCATE(tmp, &mPool, aSize);
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return tmp;
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}
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void nsDisplayListSet::MoveTo(const nsDisplayListSet& aDestination) const
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{
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aDestination.BorderBackground()->AppendToTop(BorderBackground());
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aDestination.BlockBorderBackgrounds()->AppendToTop(BlockBorderBackgrounds());
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aDestination.Floats()->AppendToTop(Floats());
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aDestination.Content()->AppendToTop(Content());
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aDestination.PositionedDescendants()->AppendToTop(PositionedDescendants());
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aDestination.Outlines()->AppendToTop(Outlines());
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}
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|
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void
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nsDisplayList::FlattenTo(nsTArray<nsDisplayItem*>* aElements) {
|
|
nsDisplayItem* item;
|
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while ((item = RemoveBottom()) != nsnull) {
|
|
if (item->GetType() == nsDisplayItem::TYPE_WRAP_LIST) {
|
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item->GetList()->FlattenTo(aElements);
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item->~nsDisplayItem();
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} else {
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aElements->AppendElement(item);
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}
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}
|
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}
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nsRect
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nsDisplayList::GetBounds(nsDisplayListBuilder* aBuilder) const {
|
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nsRect bounds;
|
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for (nsDisplayItem* i = GetBottom(); i != nsnull; i = i->GetAbove()) {
|
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bounds.UnionRect(bounds, i->GetBounds(aBuilder));
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}
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return bounds;
|
|
}
|
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|
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bool
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nsDisplayList::ComputeVisibilityForRoot(nsDisplayListBuilder* aBuilder,
|
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nsRegion* aVisibleRegion) {
|
|
nsRegion r;
|
|
r.And(*aVisibleRegion, GetBounds(aBuilder));
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return ComputeVisibilityForSublist(aBuilder, aVisibleRegion, r.GetBounds(), r.GetBounds());
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}
|
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|
|
static nsRegion
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TreatAsOpaque(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder,
|
|
bool* aTransparentBackground)
|
|
{
|
|
nsRegion opaque = aItem->GetOpaqueRegion(aBuilder, aTransparentBackground);
|
|
if (aBuilder->IsForPluginGeometry()) {
|
|
// Treat all chrome items as opaque, unless their frames are opacity:0.
|
|
// Since opacity:0 frames generate an nsDisplayOpacity, that item will
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|
// not be treated as opaque here, so opacity:0 chrome content will be
|
|
// effectively ignored, as it should be.
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nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
if (f && f->PresContext()->IsChrome() && f->GetStyleDisplay()->mOpacity != 0.0) {
|
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opaque = aItem->GetBounds(aBuilder);
|
|
}
|
|
}
|
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return opaque;
|
|
}
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|
|
static nsRect
|
|
GetDisplayPortBounds(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem)
|
|
{
|
|
// GetDisplayPortBounds() rectangle is used in order to restrict fixed aItem's
|
|
// visible bounds. nsDisplayTransform bounds already take item's
|
|
// transform into account, so there is no need to apply it here one more time.
|
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// Start TransformRectToBoundsInAncestor() calculations from aItem's frame
|
|
// parent in this case.
|
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nsIFrame* frame = aItem->GetUnderlyingFrame();
|
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if (aItem->GetType() == nsDisplayItem::TYPE_TRANSFORM) {
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frame = nsLayoutUtils::GetCrossDocParentFrame(frame);
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|
}
|
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|
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const nsRect* displayport = aBuilder->GetDisplayPort();
|
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nsRect result = nsLayoutUtils::TransformAncestorRectToFrame(
|
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frame,
|
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nsRect(0, 0, displayport->width, displayport->height),
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aBuilder->ReferenceFrame());
|
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result.MoveBy(aBuilder->ToReferenceFrame(frame));
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return result;
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}
|
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|
|
bool
|
|
nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aListVisibleBounds,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
#ifdef DEBUG
|
|
nsRegion r;
|
|
r.And(*aVisibleRegion, GetBounds(aBuilder));
|
|
NS_ASSERTION(r.GetBounds().IsEqualInterior(aListVisibleBounds),
|
|
"bad aListVisibleBounds");
|
|
#endif
|
|
mVisibleRect = aListVisibleBounds;
|
|
bool anyVisible = false;
|
|
|
|
nsAutoTArray<nsDisplayItem*, 512> elements;
|
|
FlattenTo(&elements);
|
|
|
|
bool forceTransparentSurface = false;
|
|
|
|
for (PRInt32 i = elements.Length() - 1; i >= 0; --i) {
|
|
nsDisplayItem* item = elements[i];
|
|
nsDisplayItem* belowItem = i < 1 ? nsnull : elements[i - 1];
|
|
|
|
if (belowItem && item->TryMerge(aBuilder, belowItem)) {
|
|
belowItem->~nsDisplayItem();
|
|
elements.ReplaceElementsAt(i - 1, 1, item);
|
|
continue;
|
|
}
|
|
|
|
nsDisplayList* list = item->GetList();
|
|
if (list && item->ShouldFlattenAway(aBuilder)) {
|
|
// The elements on the list >= i no longer serve any use.
|
|
elements.SetLength(i);
|
|
list->FlattenTo(&elements);
|
|
i = elements.Length();
|
|
item->~nsDisplayItem();
|
|
continue;
|
|
}
|
|
|
|
nsRect bounds = item->GetBounds(aBuilder);
|
|
|
|
nsRegion itemVisible;
|
|
if (ForceVisiblityForFixedItem(aBuilder, item)) {
|
|
itemVisible.And(GetDisplayPortBounds(aBuilder, item), bounds);
|
|
} else {
|
|
itemVisible.And(*aVisibleRegion, bounds);
|
|
}
|
|
item->mVisibleRect = itemVisible.GetBounds();
|
|
|
|
if (item->ComputeVisibility(aBuilder, aVisibleRegion, aAllowVisibleRegionExpansion)) {
|
|
anyVisible = true;
|
|
bool transparentBackground = false;
|
|
nsRegion opaque = TreatAsOpaque(item, aBuilder, &transparentBackground);
|
|
// Subtract opaque item from the visible region
|
|
aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
|
|
forceTransparentSurface = forceTransparentSurface || transparentBackground;
|
|
}
|
|
AppendToBottom(item);
|
|
}
|
|
|
|
mIsOpaque = !aVisibleRegion->Intersects(mVisibleRect);
|
|
mForceTransparentSurface = forceTransparentSurface;
|
|
#ifdef DEBUG
|
|
mDidComputeVisibility = true;
|
|
#endif
|
|
return anyVisible;
|
|
}
|
|
|
|
void nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx,
|
|
PRUint32 aFlags) const {
|
|
PaintForFrame(aBuilder, aCtx, aBuilder->ReferenceFrame(), aFlags);
|
|
}
|
|
|
|
/**
|
|
* We paint by executing a layer manager transaction, constructing a
|
|
* single layer representing the display list, and then making it the
|
|
* root of the layer manager, drawing into the ThebesLayers.
|
|
*/
|
|
void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx,
|
|
nsIFrame* aForFrame,
|
|
PRUint32 aFlags) const {
|
|
NS_ASSERTION(mDidComputeVisibility,
|
|
"Must call ComputeVisibility before calling Paint");
|
|
|
|
nsRefPtr<LayerManager> layerManager;
|
|
bool allowRetaining = false;
|
|
bool doBeginTransaction = true;
|
|
if (aFlags & PAINT_USE_WIDGET_LAYERS) {
|
|
nsIFrame* referenceFrame = aBuilder->ReferenceFrame();
|
|
NS_ASSERTION(referenceFrame == nsLayoutUtils::GetDisplayRootFrame(referenceFrame),
|
|
"Reference frame must be a display root for us to use the layer manager");
|
|
nsIWidget* window = referenceFrame->GetNearestWidget();
|
|
if (window) {
|
|
layerManager = window->GetLayerManager(&allowRetaining);
|
|
if (layerManager) {
|
|
doBeginTransaction = !(aFlags & PAINT_EXISTING_TRANSACTION);
|
|
}
|
|
}
|
|
}
|
|
if (!layerManager) {
|
|
if (!aCtx) {
|
|
NS_WARNING("Nowhere to paint into");
|
|
return;
|
|
}
|
|
layerManager = new BasicLayerManager();
|
|
}
|
|
|
|
if (aFlags & PAINT_FLUSH_LAYERS) {
|
|
FrameLayerBuilder::InvalidateAllLayers(layerManager);
|
|
}
|
|
|
|
if (doBeginTransaction) {
|
|
if (aCtx) {
|
|
layerManager->BeginTransactionWithTarget(aCtx->ThebesContext());
|
|
} else {
|
|
layerManager->BeginTransaction();
|
|
}
|
|
}
|
|
if (allowRetaining) {
|
|
aBuilder->LayerBuilder()->DidBeginRetainedLayerTransaction(layerManager);
|
|
}
|
|
|
|
nsPresContext* presContext = aForFrame->PresContext();
|
|
nsIPresShell* presShell = presContext->GetPresShell();
|
|
|
|
nsDisplayItem::ContainerParameters containerParameters
|
|
(presShell->GetXResolution(), presShell->GetYResolution());
|
|
nsRefPtr<ContainerLayer> root = aBuilder->LayerBuilder()->
|
|
BuildContainerLayerFor(aBuilder, layerManager, aForFrame, nsnull, *this,
|
|
containerParameters, nsnull);
|
|
if (!root)
|
|
return;
|
|
// Root is being scaled up by the X/Y resolution. Scale it back down.
|
|
gfx3DMatrix rootTransform = root->GetTransform()*
|
|
gfx3DMatrix::ScalingMatrix(1.0f/containerParameters.mXScale,
|
|
1.0f/containerParameters.mYScale, 1.0f);
|
|
root->SetTransform(rootTransform);
|
|
|
|
ViewID id = presContext->IsRootContentDocument() ? FrameMetrics::ROOT_SCROLL_ID
|
|
: FrameMetrics::NULL_SCROLL_ID;
|
|
|
|
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
|
nsRect displayport;
|
|
bool usingDisplayport = false;
|
|
if (rootScrollFrame) {
|
|
nsIContent* content = rootScrollFrame->GetContent();
|
|
if (content) {
|
|
usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport);
|
|
}
|
|
}
|
|
RecordFrameMetrics(aForFrame, rootScrollFrame,
|
|
root, mVisibleRect, mVisibleRect,
|
|
(usingDisplayport ? &displayport : nsnull), id,
|
|
containerParameters);
|
|
if (usingDisplayport &&
|
|
!(root->GetContentFlags() & Layer::CONTENT_OPAQUE)) {
|
|
// See bug 693938, attachment 567017
|
|
NS_WARNING("We don't support transparent content with displayports, force it to be opqaue");
|
|
root->SetContentFlags(Layer::CONTENT_OPAQUE);
|
|
}
|
|
|
|
layerManager->SetRoot(root);
|
|
aBuilder->LayerBuilder()->WillEndTransaction(layerManager);
|
|
layerManager->EndTransaction(FrameLayerBuilder::DrawThebesLayer,
|
|
aBuilder);
|
|
aBuilder->LayerBuilder()->DidEndTransaction(layerManager);
|
|
|
|
if (aFlags & PAINT_FLUSH_LAYERS) {
|
|
FrameLayerBuilder::InvalidateAllLayers(layerManager);
|
|
}
|
|
|
|
nsCSSRendering::DidPaint();
|
|
}
|
|
|
|
PRUint32 nsDisplayList::Count() const {
|
|
PRUint32 count = 0;
|
|
for (nsDisplayItem* i = GetBottom(); i; i = i->GetAbove()) {
|
|
++count;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
nsDisplayItem* nsDisplayList::RemoveBottom() {
|
|
nsDisplayItem* item = mSentinel.mAbove;
|
|
if (!item)
|
|
return nsnull;
|
|
mSentinel.mAbove = item->mAbove;
|
|
if (item == mTop) {
|
|
// must have been the only item
|
|
mTop = &mSentinel;
|
|
}
|
|
item->mAbove = nsnull;
|
|
return item;
|
|
}
|
|
|
|
void nsDisplayList::DeleteAll() {
|
|
nsDisplayItem* item;
|
|
while ((item = RemoveBottom()) != nsnull) {
|
|
item->~nsDisplayItem();
|
|
}
|
|
}
|
|
|
|
static bool
|
|
GetMouseThrough(const nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame->IsBoxFrame())
|
|
return false;
|
|
|
|
const nsIFrame* frame = aFrame;
|
|
while (frame) {
|
|
if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_ALWAYS) {
|
|
return true;
|
|
} else if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_NEVER) {
|
|
return false;
|
|
}
|
|
frame = frame->GetParentBox();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// A list of frames, and their z depth. Used for sorting
|
|
// the results of hit testing.
|
|
struct FramesWithDepth
|
|
{
|
|
FramesWithDepth(float aDepth) :
|
|
mDepth(aDepth)
|
|
{}
|
|
|
|
bool operator<(const FramesWithDepth& aOther) const {
|
|
if (mDepth != aOther.mDepth) {
|
|
// We want to sort so that the shallowest item (highest depth value) is first
|
|
return mDepth > aOther.mDepth;
|
|
}
|
|
return this < &aOther;
|
|
}
|
|
bool operator==(const FramesWithDepth& aOther) const {
|
|
return this == &aOther;
|
|
}
|
|
|
|
float mDepth;
|
|
nsTArray<nsIFrame*> mFrames;
|
|
};
|
|
|
|
// Sort the frames by depth and then moves all the contained frames to the destination
|
|
void FlushFramesArray(nsTArray<FramesWithDepth>& aSource, nsTArray<nsIFrame*>* aDest)
|
|
{
|
|
if (aSource.IsEmpty()) {
|
|
return;
|
|
}
|
|
aSource.Sort();
|
|
PRUint32 length = aSource.Length();
|
|
for (PRUint32 i = 0; i < length; i++) {
|
|
aDest->MoveElementsFrom(aSource[i].mFrames);
|
|
}
|
|
aSource.Clear();
|
|
}
|
|
|
|
void nsDisplayList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
|
|
nsDisplayItem::HitTestState* aState,
|
|
nsTArray<nsIFrame*> *aOutFrames) const {
|
|
PRInt32 itemBufferStart = aState->mItemBuffer.Length();
|
|
nsDisplayItem* item;
|
|
for (item = GetBottom(); item; item = item->GetAbove()) {
|
|
aState->mItemBuffer.AppendElement(item);
|
|
}
|
|
nsAutoTArray<FramesWithDepth, 16> temp;
|
|
for (PRInt32 i = aState->mItemBuffer.Length() - 1; i >= itemBufferStart; --i) {
|
|
// Pop element off the end of the buffer. We want to shorten the buffer
|
|
// so that recursive calls to HitTest have more buffer space.
|
|
item = aState->mItemBuffer[i];
|
|
aState->mItemBuffer.SetLength(i);
|
|
|
|
if (aRect.Intersects(item->GetBounds(aBuilder))) {
|
|
nsAutoTArray<nsIFrame*, 16> outFrames;
|
|
item->HitTest(aBuilder, aRect, aState, &outFrames);
|
|
|
|
// For 3d transforms with preserve-3d we add hit frames into the temp list
|
|
// so we can sort them later, otherwise we add them directly to the output list.
|
|
nsTArray<nsIFrame*> *writeFrames = aOutFrames;
|
|
if (item->GetType() == nsDisplayItem::TYPE_TRANSFORM &&
|
|
item->GetUnderlyingFrame()->Preserves3D()) {
|
|
if (outFrames.Length()) {
|
|
nsDisplayTransform *transform = static_cast<nsDisplayTransform*>(item);
|
|
nsPoint point = aRect.TopLeft();
|
|
// A 1x1 rect means a point, otherwise use the center of the rect
|
|
if (aRect.width != 1 || aRect.height != 1) {
|
|
point = aRect.Center();
|
|
}
|
|
temp.AppendElement(FramesWithDepth(transform->GetHitDepthAtPoint(point)));
|
|
writeFrames = &temp[temp.Length() - 1].mFrames;
|
|
}
|
|
} else {
|
|
// We may have just finished a run of consecutive preserve-3d transforms,
|
|
// so flush these into the destination array before processing our frame list.
|
|
FlushFramesArray(temp, aOutFrames);
|
|
}
|
|
|
|
for (PRUint32 j = 0; j < outFrames.Length(); j++) {
|
|
nsIFrame *f = outFrames.ElementAt(j);
|
|
// Handle the XUL 'mousethrough' feature and 'pointer-events'.
|
|
if (!GetMouseThrough(f) &&
|
|
f->GetStyleVisibility()->mPointerEvents != NS_STYLE_POINTER_EVENTS_NONE) {
|
|
writeFrames->AppendElement(f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Clear any remaining preserve-3d transforms.
|
|
FlushFramesArray(temp, aOutFrames);
|
|
NS_ASSERTION(aState->mItemBuffer.Length() == PRUint32(itemBufferStart),
|
|
"How did we forget to pop some elements?");
|
|
}
|
|
|
|
static void Sort(nsDisplayList* aList, PRInt32 aCount, nsDisplayList::SortLEQ aCmp,
|
|
void* aClosure) {
|
|
if (aCount < 2)
|
|
return;
|
|
|
|
nsDisplayList list1;
|
|
nsDisplayList list2;
|
|
int i;
|
|
PRInt32 half = aCount/2;
|
|
bool sorted = true;
|
|
nsDisplayItem* prev = nsnull;
|
|
for (i = 0; i < aCount; ++i) {
|
|
nsDisplayItem* item = aList->RemoveBottom();
|
|
(i < half ? &list1 : &list2)->AppendToTop(item);
|
|
if (sorted && prev && !aCmp(prev, item, aClosure)) {
|
|
sorted = false;
|
|
}
|
|
prev = item;
|
|
}
|
|
if (sorted) {
|
|
aList->AppendToTop(&list1);
|
|
aList->AppendToTop(&list2);
|
|
return;
|
|
}
|
|
|
|
Sort(&list1, half, aCmp, aClosure);
|
|
Sort(&list2, aCount - half, aCmp, aClosure);
|
|
|
|
for (i = 0; i < aCount; ++i) {
|
|
if (list1.GetBottom() &&
|
|
(!list2.GetBottom() ||
|
|
aCmp(list1.GetBottom(), list2.GetBottom(), aClosure))) {
|
|
aList->AppendToTop(list1.RemoveBottom());
|
|
} else {
|
|
aList->AppendToTop(list2.RemoveBottom());
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool IsContentLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2,
|
|
void* aClosure) {
|
|
// These GetUnderlyingFrame calls return non-null because we're only used
|
|
// in sorting
|
|
return nsLayoutUtils::CompareTreePosition(
|
|
aItem1->GetUnderlyingFrame()->GetContent(),
|
|
aItem2->GetUnderlyingFrame()->GetContent(),
|
|
static_cast<nsIContent*>(aClosure)) <= 0;
|
|
}
|
|
|
|
static bool IsZOrderLEQ(nsDisplayItem* aItem1, nsDisplayItem* aItem2,
|
|
void* aClosure) {
|
|
// These GetUnderlyingFrame calls return non-null because we're only used
|
|
// in sorting. Note that we can't just take the difference of the two
|
|
// z-indices here, because that might overflow a 32-bit int.
|
|
PRInt32 index1 = nsLayoutUtils::GetZIndex(aItem1->GetUnderlyingFrame());
|
|
PRInt32 index2 = nsLayoutUtils::GetZIndex(aItem2->GetUnderlyingFrame());
|
|
if (index1 == index2)
|
|
return IsContentLEQ(aItem1, aItem2, aClosure);
|
|
return index1 < index2;
|
|
}
|
|
|
|
void nsDisplayList::ExplodeAnonymousChildLists(nsDisplayListBuilder* aBuilder) {
|
|
// See if there's anything to do
|
|
bool anyAnonymousItems = false;
|
|
nsDisplayItem* i;
|
|
for (i = GetBottom(); i != nsnull; i = i->GetAbove()) {
|
|
if (!i->GetUnderlyingFrame()) {
|
|
anyAnonymousItems = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!anyAnonymousItems)
|
|
return;
|
|
|
|
nsDisplayList tmp;
|
|
while ((i = RemoveBottom()) != nsnull) {
|
|
if (i->GetUnderlyingFrame()) {
|
|
tmp.AppendToTop(i);
|
|
} else {
|
|
nsDisplayList* list = i->GetList();
|
|
NS_ASSERTION(list, "leaf items can't be anonymous");
|
|
list->ExplodeAnonymousChildLists(aBuilder);
|
|
nsDisplayItem* j;
|
|
while ((j = list->RemoveBottom()) != nsnull) {
|
|
tmp.AppendToTop(static_cast<nsDisplayWrapList*>(i)->
|
|
WrapWithClone(aBuilder, j));
|
|
}
|
|
i->~nsDisplayItem();
|
|
}
|
|
}
|
|
|
|
AppendToTop(&tmp);
|
|
}
|
|
|
|
void nsDisplayList::SortByZOrder(nsDisplayListBuilder* aBuilder,
|
|
nsIContent* aCommonAncestor) {
|
|
Sort(aBuilder, IsZOrderLEQ, aCommonAncestor);
|
|
}
|
|
|
|
void nsDisplayList::SortByContentOrder(nsDisplayListBuilder* aBuilder,
|
|
nsIContent* aCommonAncestor) {
|
|
Sort(aBuilder, IsContentLEQ, aCommonAncestor);
|
|
}
|
|
|
|
void nsDisplayList::Sort(nsDisplayListBuilder* aBuilder,
|
|
SortLEQ aCmp, void* aClosure) {
|
|
ExplodeAnonymousChildLists(aBuilder);
|
|
::Sort(this, Count(), aCmp, aClosure);
|
|
}
|
|
|
|
bool nsDisplayItem::RecomputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion) {
|
|
nsRect bounds = GetBounds(aBuilder);
|
|
|
|
nsRegion itemVisible;
|
|
if (ForceVisiblityForFixedItem(aBuilder, this)) {
|
|
itemVisible.And(GetDisplayPortBounds(aBuilder, this), bounds);
|
|
} else {
|
|
itemVisible.And(*aVisibleRegion, bounds);
|
|
}
|
|
mVisibleRect = itemVisible.GetBounds();
|
|
|
|
// When we recompute visibility within layers we don't need to
|
|
// expand the visible region for content behind plugins (the plugin
|
|
// is not in the layer).
|
|
if (!ComputeVisibility(aBuilder, aVisibleRegion, nsRect()))
|
|
return false;
|
|
|
|
bool forceTransparentBackground;
|
|
nsRegion opaque = TreatAsOpaque(this, aBuilder, &forceTransparentBackground);
|
|
aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
|
|
return true;
|
|
}
|
|
|
|
// Note that even if the rectangle we draw and snap is smaller than aRect,
|
|
// it's OK to call this to get a bounding rect for what we'll draw, because
|
|
// snapping a rectangle which is contained in R always gives you a
|
|
// rectangle which is contained in the snapped R.
|
|
static nsRect
|
|
SnapBounds(bool aSnappingEnabled, nsPresContext* aPresContext,
|
|
const nsRect& aRect) {
|
|
nsRect r = aRect;
|
|
if (aSnappingEnabled) {
|
|
nscoord appUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
|
|
r = r.ToNearestPixels(appUnitsPerDevPixel).ToAppUnits(appUnitsPerDevPixel);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
nsRect
|
|
nsDisplaySolidColor::GetBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
return SnapBounds(mSnappingEnabled, presContext, mBounds);
|
|
}
|
|
|
|
void
|
|
nsDisplaySolidColor::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx)
|
|
{
|
|
aCtx->SetColor(mColor);
|
|
aCtx->FillRect(mVisibleRect);
|
|
}
|
|
|
|
static void
|
|
RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
|
|
|
|
for (nsIFrame* f = aFrame; f; f = f->GetParent()) {
|
|
// Bail out if we're in a transformed subtree
|
|
if (f->IsTransformed())
|
|
return;
|
|
// Bail out if we're not in the displayRoot's document
|
|
if (!f->GetParent() && f != displayRoot)
|
|
return;
|
|
}
|
|
|
|
nsRect borderBox(aFrame->GetOffsetTo(displayRoot), aFrame->GetSize());
|
|
aBuilder->RegisterThemeGeometry(aFrame->GetStyleDisplay()->mAppearance,
|
|
borderBox.ToNearestPixels(aFrame->PresContext()->AppUnitsPerDevPixel()));
|
|
}
|
|
|
|
nsDisplayBackground::nsDisplayBackground(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame)
|
|
: nsDisplayItem(aBuilder, aFrame),
|
|
mSnappingEnabled(aBuilder->IsSnappingEnabled() && !aBuilder->IsInTransform())
|
|
{
|
|
MOZ_COUNT_CTOR(nsDisplayBackground);
|
|
const nsStyleDisplay* disp = mFrame->GetStyleDisplay();
|
|
mIsThemed = mFrame->IsThemed(disp, &mThemeTransparency);
|
|
|
|
if (mIsThemed) {
|
|
// Perform necessary RegisterThemeGeometry
|
|
if (disp->mAppearance == NS_THEME_MOZ_MAC_UNIFIED_TOOLBAR ||
|
|
disp->mAppearance == NS_THEME_TOOLBAR) {
|
|
RegisterThemeGeometry(aBuilder, aFrame);
|
|
}
|
|
} else {
|
|
// Set HasFixedItems if we construct a background-attachment:fixed item
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
nsStyleContext* bgSC;
|
|
bool hasBG = nsCSSRendering::FindBackground(presContext, mFrame, &bgSC);
|
|
if (hasBG && bgSC->GetStyleBackground()->HasFixedBackground()) {
|
|
aBuilder->SetHasFixedItems();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Helper for RoundedRectIntersectsRect.
|
|
static bool
|
|
CheckCorner(nscoord aXOffset, nscoord aYOffset,
|
|
nscoord aXRadius, nscoord aYRadius)
|
|
{
|
|
NS_ABORT_IF_FALSE(aXOffset > 0 && aYOffset > 0,
|
|
"must not pass nonpositives to CheckCorner");
|
|
NS_ABORT_IF_FALSE(aXRadius >= 0 && aYRadius >= 0,
|
|
"must not pass negatives to CheckCorner");
|
|
|
|
// Avoid floating point math unless we're either (1) within the
|
|
// quarter-ellipse area at the rounded corner or (2) outside the
|
|
// rounding.
|
|
if (aXOffset >= aXRadius || aYOffset >= aYRadius)
|
|
return true;
|
|
|
|
// Convert coordinates to a unit circle with (0,0) as the center of
|
|
// curvature, and see if we're inside the circle or outside.
|
|
float scaledX = float(aXRadius - aXOffset) / float(aXRadius);
|
|
float scaledY = float(aYRadius - aYOffset) / float(aYRadius);
|
|
return scaledX * scaledX + scaledY * scaledY < 1.0f;
|
|
}
|
|
|
|
|
|
/**
|
|
* Return whether any part of aTestRect is inside of the rounded
|
|
* rectangle formed by aBounds and aRadii (which are indexed by the
|
|
* NS_CORNER_* constants in nsStyleConsts.h).
|
|
*
|
|
* See also RoundedRectContainsRect.
|
|
*/
|
|
static bool
|
|
RoundedRectIntersectsRect(const nsRect& aRoundedRect, nscoord aRadii[8],
|
|
const nsRect& aTestRect)
|
|
{
|
|
NS_ABORT_IF_FALSE(aTestRect.Intersects(aRoundedRect),
|
|
"we should already have tested basic rect intersection");
|
|
|
|
// distances from this edge of aRoundedRect to opposite edge of aTestRect,
|
|
// which we know are positive due to the Intersects check above.
|
|
nsMargin insets;
|
|
insets.top = aTestRect.YMost() - aRoundedRect.y;
|
|
insets.right = aRoundedRect.XMost() - aTestRect.x;
|
|
insets.bottom = aRoundedRect.YMost() - aTestRect.y;
|
|
insets.left = aTestRect.XMost() - aRoundedRect.x;
|
|
|
|
// Check whether the bottom-right corner of aTestRect is inside the
|
|
// top left corner of aBounds when rounded by aRadii, etc. If any
|
|
// corner is not, then fail; otherwise succeed.
|
|
return CheckCorner(insets.left, insets.top,
|
|
aRadii[NS_CORNER_TOP_LEFT_X],
|
|
aRadii[NS_CORNER_TOP_LEFT_Y]) &&
|
|
CheckCorner(insets.right, insets.top,
|
|
aRadii[NS_CORNER_TOP_RIGHT_X],
|
|
aRadii[NS_CORNER_TOP_RIGHT_Y]) &&
|
|
CheckCorner(insets.right, insets.bottom,
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_X],
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_Y]) &&
|
|
CheckCorner(insets.left, insets.bottom,
|
|
aRadii[NS_CORNER_BOTTOM_LEFT_X],
|
|
aRadii[NS_CORNER_BOTTOM_LEFT_Y]);
|
|
}
|
|
|
|
// Check that the rounded border of aFrame, added to aToReferenceFrame,
|
|
// intersects aRect. Assumes that the unrounded border has already
|
|
// been checked for intersection.
|
|
static bool
|
|
RoundedBorderIntersectsRect(nsIFrame* aFrame,
|
|
const nsPoint& aFrameToReferenceFrame,
|
|
const nsRect& aTestRect)
|
|
{
|
|
if (!nsRect(aFrameToReferenceFrame, aFrame->GetSize()).Intersects(aTestRect))
|
|
return false;
|
|
|
|
nscoord radii[8];
|
|
return !aFrame->GetBorderRadii(radii) ||
|
|
RoundedRectIntersectsRect(nsRect(aFrameToReferenceFrame,
|
|
aFrame->GetSize()),
|
|
radii, aTestRect);
|
|
}
|
|
|
|
// Returns TRUE if aContainedRect is guaranteed to be contained in
|
|
// the rounded rect defined by aRoundedRect and aRadii. Complex cases are
|
|
// handled conservatively by returning FALSE in some situations where
|
|
// a more thorough analysis could return TRUE.
|
|
//
|
|
// See also RoundedRectIntersectsRect.
|
|
static bool RoundedRectContainsRect(const nsRect& aRoundedRect,
|
|
const nscoord aRadii[8],
|
|
const nsRect& aContainedRect) {
|
|
nsRegion rgn = nsLayoutUtils::RoundedRectIntersectRect(aRoundedRect, aRadii, aContainedRect);
|
|
return rgn.Contains(aContainedRect);
|
|
}
|
|
|
|
void
|
|
nsDisplayBackground::HitTest(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aRect,
|
|
HitTestState* aState,
|
|
nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
if (mIsThemed) {
|
|
// For theme backgrounds, assume that any point in our border rect is a hit.
|
|
if (!nsRect(ToReferenceFrame(), mFrame->GetSize()).Intersects(aRect))
|
|
return;
|
|
} else {
|
|
if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
|
|
// aRect doesn't intersect our border-radius curve.
|
|
return;
|
|
}
|
|
}
|
|
|
|
aOutFrames->AppendElement(mFrame);
|
|
}
|
|
|
|
bool
|
|
nsDisplayBackground::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion)
|
|
{
|
|
if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion)) {
|
|
return false;
|
|
}
|
|
|
|
// Return false if the background was propagated away from this
|
|
// frame. We don't want this display item to show up and confuse
|
|
// anything.
|
|
nsStyleContext* bgSC;
|
|
return mIsThemed ||
|
|
nsCSSRendering::FindBackground(mFrame->PresContext(), mFrame, &bgSC);
|
|
}
|
|
|
|
nsRegion
|
|
nsDisplayBackground::GetInsideClipRegion(nsPresContext* aPresContext,
|
|
PRUint8 aClip, const nsRect& aRect)
|
|
{
|
|
nsRegion result;
|
|
if (aRect.IsEmpty())
|
|
return result;
|
|
|
|
nscoord radii[8];
|
|
nsRect clipRect;
|
|
bool haveRadii;
|
|
switch (aClip) {
|
|
case NS_STYLE_BG_CLIP_BORDER:
|
|
haveRadii = mFrame->GetBorderRadii(radii);
|
|
clipRect = nsRect(ToReferenceFrame(), mFrame->GetSize());
|
|
break;
|
|
case NS_STYLE_BG_CLIP_PADDING:
|
|
haveRadii = mFrame->GetPaddingBoxBorderRadii(radii);
|
|
clipRect = mFrame->GetPaddingRect() - mFrame->GetPosition() + ToReferenceFrame();
|
|
break;
|
|
case NS_STYLE_BG_CLIP_CONTENT:
|
|
haveRadii = mFrame->GetContentBoxBorderRadii(radii);
|
|
clipRect = mFrame->GetContentRect() - mFrame->GetPosition() + ToReferenceFrame();
|
|
break;
|
|
default:
|
|
NS_NOTREACHED("Unknown clip type");
|
|
return result;
|
|
}
|
|
|
|
nsRect inputRect = SnapBounds(mSnappingEnabled, aPresContext, aRect);
|
|
clipRect = SnapBounds(mSnappingEnabled, aPresContext, clipRect);
|
|
|
|
if (haveRadii) {
|
|
result = nsLayoutUtils::RoundedRectIntersectRect(clipRect, radii, inputRect);
|
|
} else {
|
|
nsRect r;
|
|
r.IntersectRect(clipRect, inputRect);
|
|
result = r;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
nsRegion
|
|
nsDisplayBackground::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aForceTransparentSurface) {
|
|
nsRegion result;
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
// theme background overrides any other background
|
|
if (mIsThemed) {
|
|
if (aForceTransparentSurface) {
|
|
const nsStyleDisplay* disp = mFrame->GetStyleDisplay();
|
|
*aForceTransparentSurface = disp->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS ||
|
|
disp->mAppearance == NS_THEME_WIN_GLASS;
|
|
}
|
|
if (mThemeTransparency == nsITheme::eOpaque) {
|
|
result = GetBounds(aBuilder);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
nsStyleContext* bgSC;
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
if (!nsCSSRendering::FindBackground(mFrame->PresContext(), mFrame, &bgSC))
|
|
return result;
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
const nsStyleBackground::Layer& bottomLayer = bg->BottomLayer();
|
|
|
|
nsRect borderBox = nsRect(ToReferenceFrame(), mFrame->GetSize());
|
|
if (NS_GET_A(bg->mBackgroundColor) == 255 &&
|
|
!nsCSSRendering::IsCanvasFrame(mFrame)) {
|
|
result = GetInsideClipRegion(presContext, bottomLayer.mClip, borderBox);
|
|
}
|
|
|
|
// For policies other than EACH_BOX, don't try to optimize here, since
|
|
// this could easily lead to O(N^2) behavior inside InlineBackgroundData,
|
|
// which expects frames to be sent to it in content order, not reverse
|
|
// content order which we'll produce here.
|
|
// Of course, if there's only one frame in the flow, it doesn't matter.
|
|
if (bg->mBackgroundInlinePolicy == NS_STYLE_BG_INLINE_POLICY_EACH_BOX ||
|
|
(!mFrame->GetPrevContinuation() && !mFrame->GetNextContinuation())) {
|
|
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
|
|
const nsStyleBackground::Layer& layer = bg->mLayers[i];
|
|
if (layer.mImage.IsOpaque()) {
|
|
nsRect r = nsCSSRendering::GetBackgroundLayerRect(presContext, mFrame,
|
|
borderBox, *bg, layer);
|
|
result.Or(result, GetInsideClipRegion(presContext, layer.mClip, r));
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
bool
|
|
nsDisplayBackground::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) {
|
|
// theme background overrides any other background
|
|
if (mIsThemed) {
|
|
const nsStyleDisplay* disp = mFrame->GetStyleDisplay();
|
|
if (disp->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS ||
|
|
disp->mAppearance == NS_THEME_WIN_GLASS) {
|
|
*aColor = NS_RGBA(0,0,0,0);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsStyleContext *bgSC;
|
|
bool hasBG =
|
|
nsCSSRendering::FindBackground(mFrame->PresContext(), mFrame, &bgSC);
|
|
if (!hasBG) {
|
|
*aColor = NS_RGBA(0,0,0,0);
|
|
return true;
|
|
}
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
if (bg->BottomLayer().mImage.IsEmpty() &&
|
|
bg->mImageCount == 1 &&
|
|
!nsLayoutUtils::HasNonZeroCorner(mFrame->GetStyleBorder()->mBorderRadius) &&
|
|
bg->BottomLayer().mClip == NS_STYLE_BG_CLIP_BORDER) {
|
|
// Canvas frames don't actually render their background color, since that
|
|
// gets propagated to the solid color of the viewport
|
|
// (see nsCSSRendering::PaintBackgroundWithSC)
|
|
*aColor = nsCSSRendering::IsCanvasFrame(mFrame) ? NS_RGBA(0,0,0,0)
|
|
: bg->mBackgroundColor;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsDisplayBackground::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame)
|
|
{
|
|
// theme background overrides any other background and is never fixed
|
|
if (mIsThemed)
|
|
return false;
|
|
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
nsStyleContext *bgSC;
|
|
bool hasBG =
|
|
nsCSSRendering::FindBackground(presContext, mFrame, &bgSC);
|
|
if (!hasBG)
|
|
return false;
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
if (!bg->HasFixedBackground())
|
|
return false;
|
|
|
|
// If aFrame is mFrame or an ancestor in this document, and aFrame is
|
|
// not the viewport frame, then moving aFrame will move mFrame
|
|
// relative to the viewport, so our fixed-pos background will change.
|
|
return aFrame->GetParent() &&
|
|
(aFrame == mFrame ||
|
|
nsLayoutUtils::IsProperAncestorFrame(aFrame, mFrame));
|
|
}
|
|
|
|
bool
|
|
nsDisplayBackground::ShouldFixToViewport(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
if (mIsThemed)
|
|
return false;
|
|
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
nsStyleContext* bgSC;
|
|
bool hasBG =
|
|
nsCSSRendering::FindBackground(presContext, mFrame, &bgSC);
|
|
if (!hasBG)
|
|
return false;
|
|
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
if (!bg->HasFixedBackground())
|
|
return false;
|
|
|
|
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
|
|
const nsStyleBackground::Layer& layer = bg->mLayers[i];
|
|
if (layer.mAttachment != NS_STYLE_BG_ATTACHMENT_FIXED &&
|
|
!layer.mImage.IsEmpty()) {
|
|
return false;
|
|
}
|
|
if (layer.mClip != NS_STYLE_BG_CLIP_BORDER)
|
|
return false;
|
|
}
|
|
|
|
if (nsLayoutUtils::HasNonZeroCorner(mFrame->GetStyleBorder()->mBorderRadius))
|
|
return false;
|
|
|
|
nsRect bounds = GetBounds(aBuilder);
|
|
nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame();
|
|
if (!rootScrollFrame)
|
|
return false;
|
|
nsIScrollableFrame* scrollable = do_QueryFrame(rootScrollFrame);
|
|
nsRect scrollport = scrollable->GetScrollPortRect() +
|
|
aBuilder->ToReferenceFrame(rootScrollFrame);
|
|
return bounds.Contains(scrollport);
|
|
}
|
|
|
|
void
|
|
nsDisplayBackground::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
nsPoint offset = ToReferenceFrame();
|
|
PRUint32 flags = aBuilder->GetBackgroundPaintFlags();
|
|
nsDisplayItem* nextItem = GetAbove();
|
|
if (nextItem && nextItem->GetUnderlyingFrame() == mFrame &&
|
|
nextItem->GetType() == TYPE_BORDER) {
|
|
flags |= nsCSSRendering::PAINTBG_WILL_PAINT_BORDER;
|
|
}
|
|
nsCSSRendering::PaintBackground(mFrame->PresContext(), *aCtx, mFrame,
|
|
mVisibleRect,
|
|
nsRect(offset, mFrame->GetSize()),
|
|
flags);
|
|
}
|
|
|
|
nsRect
|
|
nsDisplayBackground::GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
nsRect r(nsPoint(0,0), mFrame->GetSize());
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
|
|
if (mIsThemed) {
|
|
presContext->GetTheme()->
|
|
GetWidgetOverflow(presContext->DeviceContext(), mFrame,
|
|
mFrame->GetStyleDisplay()->mAppearance, &r);
|
|
}
|
|
|
|
return SnapBounds(mSnappingEnabled, presContext, r + ToReferenceFrame());
|
|
}
|
|
|
|
nsRect
|
|
nsDisplayOutline::GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
|
|
}
|
|
|
|
void
|
|
nsDisplayOutline::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
// TODO join outlines together
|
|
nsPoint offset = ToReferenceFrame();
|
|
nsCSSRendering::PaintOutline(mFrame->PresContext(), *aCtx, mFrame,
|
|
mVisibleRect,
|
|
nsRect(offset, mFrame->GetSize()),
|
|
mFrame->GetStyleContext());
|
|
}
|
|
|
|
bool
|
|
nsDisplayOutline::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion)) {
|
|
return false;
|
|
}
|
|
|
|
const nsStyleOutline* outline = mFrame->GetStyleOutline();
|
|
nsRect borderBox(ToReferenceFrame(), mFrame->GetSize());
|
|
if (borderBox.Contains(aVisibleRegion->GetBounds()) &&
|
|
!nsLayoutUtils::HasNonZeroCorner(outline->mOutlineRadius)) {
|
|
if (outline->mOutlineOffset >= 0) {
|
|
// the visible region is entirely inside the border-rect, and the outline
|
|
// isn't rendered inside the border-rect, so the outline is not visible
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsDisplayEventReceiver::HitTest(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aRect,
|
|
HitTestState* aState,
|
|
nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
|
|
// aRect doesn't intersect our border-radius curve.
|
|
return;
|
|
}
|
|
|
|
aOutFrames->AppendElement(mFrame);
|
|
}
|
|
|
|
void
|
|
nsDisplayCaret::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
// Note: Because we exist, we know that the caret is visible, so we don't
|
|
// need to check for the caret's visibility.
|
|
mCaret->PaintCaret(aBuilder, aCtx, mFrame, ToReferenceFrame());
|
|
}
|
|
|
|
bool
|
|
nsDisplayBorder::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion)) {
|
|
return false;
|
|
}
|
|
|
|
nsRect paddingRect = mFrame->GetPaddingRect() - mFrame->GetPosition() +
|
|
ToReferenceFrame();
|
|
const nsStyleBorder *styleBorder;
|
|
if (paddingRect.Contains(aVisibleRegion->GetBounds()) &&
|
|
!(styleBorder = mFrame->GetStyleBorder())->IsBorderImageLoaded() &&
|
|
!nsLayoutUtils::HasNonZeroCorner(styleBorder->mBorderRadius)) {
|
|
// the visible region is entirely inside the content rect, and no part
|
|
// of the border is rendered inside the content rect, so we are not
|
|
// visible
|
|
// Skip this if there's a border-image (which draws a background
|
|
// too) or if there is a border-radius (which makes the border draw
|
|
// further in).
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
nsPoint offset = ToReferenceFrame();
|
|
nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame,
|
|
mVisibleRect,
|
|
nsRect(offset, mFrame->GetSize()),
|
|
mFrame->GetStyleContext(),
|
|
mFrame->GetSkipSides());
|
|
}
|
|
|
|
nsRect
|
|
nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize());
|
|
borderBounds.Inflate(mFrame->GetStyleBorder()->GetImageOutset());
|
|
return SnapBounds(mSnappingEnabled, mFrame->PresContext(), borderBounds);
|
|
}
|
|
|
|
// Given a region, compute a conservative approximation to it as a list
|
|
// of rectangles that aren't vertically adjacent (i.e., vertically
|
|
// adjacent or overlapping rectangles are combined).
|
|
// Right now this is only approximate, some vertically overlapping rectangles
|
|
// aren't guaranteed to be combined.
|
|
static void
|
|
ComputeDisjointRectangles(const nsRegion& aRegion,
|
|
nsTArray<nsRect>* aRects) {
|
|
nscoord accumulationMargin = nsPresContext::CSSPixelsToAppUnits(25);
|
|
nsRect accumulated;
|
|
nsRegionRectIterator iter(aRegion);
|
|
while (true) {
|
|
const nsRect* r = iter.Next();
|
|
if (r && !accumulated.IsEmpty() &&
|
|
accumulated.YMost() >= r->y - accumulationMargin) {
|
|
accumulated.UnionRect(accumulated, *r);
|
|
continue;
|
|
}
|
|
|
|
if (!accumulated.IsEmpty()) {
|
|
aRects->AppendElement(accumulated);
|
|
accumulated.SetEmpty();
|
|
}
|
|
|
|
if (!r)
|
|
break;
|
|
|
|
accumulated = *r;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDisplayBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
nsPoint offset = ToReferenceFrame();
|
|
nsRect borderRect = nsRect(offset, mFrame->GetSize());
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
nsAutoTArray<nsRect,10> rects;
|
|
ComputeDisjointRectangles(mVisibleRegion, &rects);
|
|
|
|
for (PRUint32 i = 0; i < rects.Length(); ++i) {
|
|
aCtx->PushState();
|
|
aCtx->IntersectClip(rects[i]);
|
|
nsCSSRendering::PaintBoxShadowOuter(presContext, *aCtx, mFrame,
|
|
borderRect, rects[i]);
|
|
aCtx->PopState();
|
|
}
|
|
}
|
|
|
|
nsRect
|
|
nsDisplayBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
|
|
}
|
|
|
|
bool
|
|
nsDisplayBoxShadowOuter::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion)) {
|
|
return false;
|
|
}
|
|
|
|
// Store the actual visible region
|
|
mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
|
|
|
|
nsPoint origin = ToReferenceFrame();
|
|
nsRect visibleBounds = aVisibleRegion->GetBounds();
|
|
nsRect frameRect(origin, mFrame->GetSize());
|
|
if (!frameRect.Contains(visibleBounds))
|
|
return true;
|
|
|
|
// the visible region is entirely inside the border-rect, and box shadows
|
|
// never render within the border-rect (unless there's a border radius).
|
|
nscoord twipsRadii[8];
|
|
bool hasBorderRadii = mFrame->GetBorderRadii(twipsRadii);
|
|
if (!hasBorderRadii)
|
|
return false;
|
|
|
|
return !RoundedRectContainsRect(frameRect, twipsRadii, visibleBounds);
|
|
}
|
|
|
|
void
|
|
nsDisplayBoxShadowInner::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
nsPoint offset = ToReferenceFrame();
|
|
nsRect borderRect = nsRect(offset, mFrame->GetSize());
|
|
nsPresContext* presContext = mFrame->PresContext();
|
|
nsAutoTArray<nsRect,10> rects;
|
|
ComputeDisjointRectangles(mVisibleRegion, &rects);
|
|
|
|
for (PRUint32 i = 0; i < rects.Length(); ++i) {
|
|
aCtx->PushState();
|
|
aCtx->IntersectClip(rects[i]);
|
|
nsCSSRendering::PaintBoxShadowInner(presContext, *aCtx, mFrame,
|
|
borderRect, rects[i]);
|
|
aCtx->PopState();
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsDisplayBoxShadowInner::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion)) {
|
|
return false;
|
|
}
|
|
|
|
// Store the actual visible region
|
|
mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
|
|
return true;
|
|
}
|
|
|
|
nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList)
|
|
: nsDisplayItem(aBuilder, aFrame) {
|
|
mList.AppendToTop(aList);
|
|
}
|
|
|
|
nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayItem* aItem)
|
|
: nsDisplayItem(aBuilder, aFrame) {
|
|
mList.AppendToTop(aItem);
|
|
}
|
|
|
|
nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame)
|
|
: nsDisplayItem(aBuilder, aFrame) {
|
|
}
|
|
|
|
nsDisplayWrapList::~nsDisplayWrapList() {
|
|
mList.DeleteAll();
|
|
}
|
|
|
|
void
|
|
nsDisplayWrapList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
|
|
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
|
|
mList.HitTest(aBuilder, aRect, aState, aOutFrames);
|
|
}
|
|
|
|
nsRect
|
|
nsDisplayWrapList::GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
return mList.GetBounds(aBuilder);
|
|
}
|
|
|
|
bool
|
|
nsDisplayWrapList::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
return mList.ComputeVisibilityForSublist(aBuilder, aVisibleRegion,
|
|
mVisibleRect,
|
|
aAllowVisibleRegionExpansion);
|
|
}
|
|
|
|
nsRegion
|
|
nsDisplayWrapList::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aForceTransparentSurface) {
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
nsRegion result;
|
|
if (mList.IsOpaque()) {
|
|
result = GetBounds(aBuilder);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool nsDisplayWrapList::IsUniform(nsDisplayListBuilder* aBuilder, nscolor* aColor) {
|
|
// We could try to do something but let's conservatively just return false.
|
|
return false;
|
|
}
|
|
|
|
bool nsDisplayWrapList::IsVaryingRelativeToMovingFrame(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame) {
|
|
NS_WARNING("nsDisplayWrapList::IsVaryingRelativeToMovingFrame called unexpectedly");
|
|
// We could try to do something but let's conservatively just return true.
|
|
return true;
|
|
}
|
|
|
|
void nsDisplayWrapList::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
NS_ERROR("nsDisplayWrapList should have been flattened away for painting");
|
|
}
|
|
|
|
bool nsDisplayWrapList::ChildrenCanBeInactive(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
const nsDisplayList& aList,
|
|
nsIFrame* aActiveScrolledRoot) {
|
|
for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) {
|
|
nsIFrame* f = i->GetUnderlyingFrame();
|
|
if (f) {
|
|
nsIFrame* activeScrolledRoot =
|
|
nsLayoutUtils::GetActiveScrolledRootFor(f, nsnull);
|
|
if (activeScrolledRoot != aActiveScrolledRoot)
|
|
return false;
|
|
}
|
|
|
|
LayerState state = i->GetLayerState(aBuilder, aManager);
|
|
if (state == LAYER_ACTIVE)
|
|
return false;
|
|
if (state == LAYER_NONE) {
|
|
nsDisplayList* list = i->GetList();
|
|
if (list && !ChildrenCanBeInactive(aBuilder, aManager, *list, aActiveScrolledRoot))
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
nsRect nsDisplayWrapList::GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsRect bounds;
|
|
for (nsDisplayItem* i = mList.GetBottom(); i; i = i->GetAbove()) {
|
|
bounds.UnionRect(bounds, i->GetComponentAlphaBounds(aBuilder));
|
|
}
|
|
return bounds;
|
|
}
|
|
|
|
static nsresult
|
|
WrapDisplayList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
|
|
nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
|
|
if (!aList->GetTop())
|
|
return NS_OK;
|
|
nsDisplayItem* item = aWrapper->WrapList(aBuilder, aFrame, aList);
|
|
if (!item)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
// aList was emptied
|
|
aList->AppendToTop(item);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult
|
|
WrapEachDisplayItem(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
|
|
nsDisplayList newList;
|
|
nsDisplayItem* item;
|
|
while ((item = aList->RemoveBottom())) {
|
|
item = aWrapper->WrapItem(aBuilder, item);
|
|
if (!item)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
newList.AppendToTop(item);
|
|
}
|
|
// aList was emptied
|
|
aList->AppendToTop(&newList);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsDisplayWrapper::WrapLists(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, const nsDisplayListSet& aIn, const nsDisplayListSet& aOut)
|
|
{
|
|
nsresult rv = WrapListsInPlace(aBuilder, aFrame, aIn);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (&aOut == &aIn)
|
|
return NS_OK;
|
|
aOut.BorderBackground()->AppendToTop(aIn.BorderBackground());
|
|
aOut.BlockBorderBackgrounds()->AppendToTop(aIn.BlockBorderBackgrounds());
|
|
aOut.Floats()->AppendToTop(aIn.Floats());
|
|
aOut.Content()->AppendToTop(aIn.Content());
|
|
aOut.PositionedDescendants()->AppendToTop(aIn.PositionedDescendants());
|
|
aOut.Outlines()->AppendToTop(aIn.Outlines());
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsDisplayWrapper::WrapListsInPlace(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, const nsDisplayListSet& aLists)
|
|
{
|
|
nsresult rv;
|
|
if (WrapBorderBackground()) {
|
|
// Our border-backgrounds are in-flow
|
|
rv = WrapDisplayList(aBuilder, aFrame, aLists.BorderBackground(), this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
// Our block border-backgrounds are in-flow
|
|
rv = WrapDisplayList(aBuilder, aFrame, aLists.BlockBorderBackgrounds(), this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// The floats are not in flow
|
|
rv = WrapEachDisplayItem(aBuilder, aLists.Floats(), this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// Our child content is in flow
|
|
rv = WrapDisplayList(aBuilder, aFrame, aLists.Content(), this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// The positioned descendants may not be in-flow
|
|
rv = WrapEachDisplayItem(aBuilder, aLists.PositionedDescendants(), this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// The outlines may not be in-flow
|
|
return WrapEachDisplayItem(aBuilder, aLists.Outlines(), this);
|
|
}
|
|
|
|
nsDisplayOpacity::nsDisplayOpacity(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList)
|
|
: nsDisplayWrapList(aBuilder, aFrame, aList) {
|
|
MOZ_COUNT_CTOR(nsDisplayOpacity);
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayOpacity::~nsDisplayOpacity() {
|
|
MOZ_COUNT_DTOR(nsDisplayOpacity);
|
|
}
|
|
#endif
|
|
|
|
nsRegion nsDisplayOpacity::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aForceTransparentSurface) {
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
// We are never opaque, if our opacity was < 1 then we wouldn't have
|
|
// been created.
|
|
return nsRegion();
|
|
}
|
|
|
|
// nsDisplayOpacity uses layers for rendering
|
|
already_AddRefed<Layer>
|
|
nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
const ContainerParameters& aContainerParameters) {
|
|
nsRefPtr<Layer> layer = aBuilder->LayerBuilder()->
|
|
BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
|
|
aContainerParameters, nsnull);
|
|
if (!layer)
|
|
return nsnull;
|
|
|
|
layer->SetOpacity(mFrame->GetStyleDisplay()->mOpacity);
|
|
return layer.forget();
|
|
}
|
|
|
|
/**
|
|
* This doesn't take into account layer scaling --- the layer may be
|
|
* rendered at a higher (or lower) resolution, affecting the retained layer
|
|
* size --- but this should be good enough.
|
|
*/
|
|
static bool
|
|
IsItemTooSmallForActiveLayer(nsDisplayItem* aItem)
|
|
{
|
|
nsIntRect visibleDevPixels = aItem->GetVisibleRect().ToOutsidePixels(
|
|
aItem->GetUnderlyingFrame()->PresContext()->AppUnitsPerDevPixel());
|
|
static const int MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS = 16;
|
|
return visibleDevPixels.Size() <
|
|
nsIntSize(MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS, MIN_ACTIVE_LAYER_SIZE_DEV_PIXELS);
|
|
}
|
|
|
|
nsDisplayItem::LayerState
|
|
nsDisplayOpacity::GetLayerState(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager) {
|
|
if (mFrame->AreLayersMarkedActive(nsChangeHint_UpdateOpacityLayer) &&
|
|
!IsItemTooSmallForActiveLayer(this))
|
|
return LAYER_ACTIVE;
|
|
nsIFrame* activeScrolledRoot =
|
|
nsLayoutUtils::GetActiveScrolledRootFor(mFrame, nsnull);
|
|
return !ChildrenCanBeInactive(aBuilder, aManager, mList, activeScrolledRoot)
|
|
? LAYER_ACTIVE : LAYER_INACTIVE;
|
|
}
|
|
|
|
bool
|
|
nsDisplayOpacity::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
// Our children are translucent so we should not allow them to subtract
|
|
// area from aVisibleRegion. We do need to find out what is visible under
|
|
// our children in the temporary compositing buffer, because if our children
|
|
// paint our entire bounds opaquely then we don't need an alpha channel in
|
|
// the temporary compositing buffer.
|
|
nsRect bounds = GetBounds(aBuilder);
|
|
nsRegion visibleUnderChildren;
|
|
visibleUnderChildren.And(*aVisibleRegion, bounds);
|
|
nsRect allowExpansion;
|
|
allowExpansion.IntersectRect(bounds, aAllowVisibleRegionExpansion);
|
|
return
|
|
nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren,
|
|
allowExpansion);
|
|
}
|
|
|
|
bool nsDisplayOpacity::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem) {
|
|
if (aItem->GetType() != TYPE_OPACITY)
|
|
return false;
|
|
// items for the same content element should be merged into a single
|
|
// compositing group
|
|
// aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
|
|
if (aItem->GetUnderlyingFrame()->GetContent() != mFrame->GetContent())
|
|
return false;
|
|
mList.AppendToBottom(&static_cast<nsDisplayOpacity*>(aItem)->mList);
|
|
return true;
|
|
}
|
|
|
|
nsDisplayOwnLayer::nsDisplayOwnLayer(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList)
|
|
: nsDisplayWrapList(aBuilder, aFrame, aList) {
|
|
MOZ_COUNT_CTOR(nsDisplayOwnLayer);
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayOwnLayer::~nsDisplayOwnLayer() {
|
|
MOZ_COUNT_DTOR(nsDisplayOwnLayer);
|
|
}
|
|
#endif
|
|
|
|
// nsDisplayOpacity uses layers for rendering
|
|
already_AddRefed<Layer>
|
|
nsDisplayOwnLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
const ContainerParameters& aContainerParameters) {
|
|
nsRefPtr<Layer> layer = aBuilder->LayerBuilder()->
|
|
BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
|
|
aContainerParameters, nsnull);
|
|
return layer.forget();
|
|
}
|
|
|
|
nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayList* aList,
|
|
nsIFrame* aForFrame,
|
|
nsIFrame* aScrolledFrame,
|
|
nsIFrame* aScrollFrame)
|
|
: nsDisplayWrapList(aBuilder, aForFrame, aList)
|
|
, mScrollFrame(aScrollFrame)
|
|
, mScrolledFrame(aScrolledFrame)
|
|
{
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
MOZ_COUNT_CTOR(nsDisplayScrollLayer);
|
|
#endif
|
|
|
|
NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
|
|
"Need a child frame with content");
|
|
}
|
|
|
|
nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem,
|
|
nsIFrame* aForFrame,
|
|
nsIFrame* aScrolledFrame,
|
|
nsIFrame* aScrollFrame)
|
|
: nsDisplayWrapList(aBuilder, aForFrame, aItem)
|
|
, mScrollFrame(aScrollFrame)
|
|
, mScrolledFrame(aScrolledFrame)
|
|
{
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
MOZ_COUNT_CTOR(nsDisplayScrollLayer);
|
|
#endif
|
|
|
|
NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
|
|
"Need a child frame with content");
|
|
}
|
|
|
|
nsDisplayScrollLayer::nsDisplayScrollLayer(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aForFrame,
|
|
nsIFrame* aScrolledFrame,
|
|
nsIFrame* aScrollFrame)
|
|
: nsDisplayWrapList(aBuilder, aForFrame)
|
|
, mScrollFrame(aScrollFrame)
|
|
, mScrolledFrame(aScrolledFrame)
|
|
{
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
MOZ_COUNT_CTOR(nsDisplayScrollLayer);
|
|
#endif
|
|
|
|
NS_ASSERTION(mScrolledFrame && mScrolledFrame->GetContent(),
|
|
"Need a child frame with content");
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayScrollLayer::~nsDisplayScrollLayer()
|
|
{
|
|
MOZ_COUNT_DTOR(nsDisplayScrollLayer);
|
|
}
|
|
#endif
|
|
|
|
already_AddRefed<Layer>
|
|
nsDisplayScrollLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager,
|
|
const ContainerParameters& aContainerParameters) {
|
|
nsRefPtr<ContainerLayer> layer = aBuilder->LayerBuilder()->
|
|
BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList,
|
|
aContainerParameters, nsnull);
|
|
|
|
// Get the already set unique ID for scrolling this content remotely.
|
|
// Or, if not set, generate a new ID.
|
|
nsIContent* content = mScrolledFrame->GetContent();
|
|
ViewID scrollId = nsLayoutUtils::FindIDFor(content);
|
|
|
|
nsRect viewport = mScrollFrame->GetRect() -
|
|
mScrollFrame->GetPosition() +
|
|
aBuilder->ToReferenceFrame(mScrollFrame);
|
|
|
|
bool usingDisplayport = false;
|
|
nsRect displayport;
|
|
if (content) {
|
|
usingDisplayport = nsLayoutUtils::GetDisplayPort(content, &displayport);
|
|
}
|
|
RecordFrameMetrics(mScrolledFrame, mScrollFrame, layer, mVisibleRect, viewport,
|
|
(usingDisplayport ? &displayport : nsnull), scrollId,
|
|
aContainerParameters);
|
|
|
|
return layer.forget();
|
|
}
|
|
|
|
bool
|
|
nsDisplayScrollLayer::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion)
|
|
{
|
|
nsRect displayport;
|
|
if (nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), &displayport)) {
|
|
// The visible region for the children may be much bigger than the hole we
|
|
// are viewing the children from, so that the compositor process has enough
|
|
// content to asynchronously pan while content is being refreshed.
|
|
|
|
nsRegion childVisibleRegion = displayport + aBuilder->ToReferenceFrame(mScrollFrame);
|
|
|
|
nsRect boundedRect;
|
|
boundedRect.IntersectRect(childVisibleRegion.GetBounds(), mList.GetBounds(aBuilder));
|
|
nsRect allowExpansion;
|
|
allowExpansion.IntersectRect(allowExpansion, boundedRect);
|
|
bool visible = mList.ComputeVisibilityForSublist(
|
|
aBuilder, &childVisibleRegion, boundedRect, allowExpansion);
|
|
mVisibleRect = boundedRect;
|
|
|
|
return visible;
|
|
|
|
} else {
|
|
return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion,
|
|
aAllowVisibleRegionExpansion);
|
|
}
|
|
}
|
|
|
|
LayerState
|
|
nsDisplayScrollLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager)
|
|
{
|
|
// Force this as a layer so we can scroll asynchronously.
|
|
// This causes incorrect rendering for rounded clips!
|
|
return LAYER_ACTIVE_FORCE;
|
|
}
|
|
|
|
bool
|
|
nsDisplayScrollLayer::TryMerge(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem)
|
|
{
|
|
if (aItem->GetType() != TYPE_SCROLL_LAYER) {
|
|
return false;
|
|
}
|
|
|
|
nsDisplayScrollLayer* other = static_cast<nsDisplayScrollLayer*>(aItem);
|
|
if (other->mScrolledFrame != this->mScrolledFrame) {
|
|
return false;
|
|
}
|
|
|
|
FrameProperties props = mScrolledFrame->Properties();
|
|
props.Set(nsIFrame::ScrollLayerCount(),
|
|
reinterpret_cast<void*>(GetScrollLayerCount() - 1));
|
|
|
|
mList.AppendToBottom(&other->mList);
|
|
// XXX - This ensures that the frame associated with a scroll layer after
|
|
// merging is the first, rather than the last. This tends to change less,
|
|
// ensuring we're more likely to retain the associated gfx layer.
|
|
// See Bug 729534 and Bug 731641.
|
|
mFrame = other->mFrame;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsDisplayScrollLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
return GetScrollLayerCount() > 1;
|
|
}
|
|
|
|
PRWord
|
|
nsDisplayScrollLayer::GetScrollLayerCount()
|
|
{
|
|
FrameProperties props = mScrolledFrame->Properties();
|
|
#ifdef DEBUG
|
|
bool hasCount = false;
|
|
PRWord result = reinterpret_cast<PRWord>(
|
|
props.Get(nsIFrame::ScrollLayerCount(), &hasCount));
|
|
// If this aborts, then the property was either not added before scroll
|
|
// layers were created or the property was deleted to early. If the latter,
|
|
// make sure that nsDisplayScrollInfoLayer is on the bottom of the list so
|
|
// that it is processed last.
|
|
NS_ABORT_IF_FALSE(hasCount, "nsDisplayScrollLayer should always be defined");
|
|
return result;
|
|
#else
|
|
return reinterpret_cast<PRWord>(props.Get(nsIFrame::ScrollLayerCount()));
|
|
#endif
|
|
}
|
|
|
|
PRWord
|
|
nsDisplayScrollLayer::RemoveScrollLayerCount()
|
|
{
|
|
PRWord result = GetScrollLayerCount();
|
|
FrameProperties props = mScrolledFrame->Properties();
|
|
props.Remove(nsIFrame::ScrollLayerCount());
|
|
return result;
|
|
}
|
|
|
|
|
|
nsDisplayScrollInfoLayer::nsDisplayScrollInfoLayer(
|
|
nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aScrolledFrame,
|
|
nsIFrame* aScrollFrame)
|
|
: nsDisplayScrollLayer(aBuilder, aScrolledFrame, aScrolledFrame, aScrollFrame)
|
|
{
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
MOZ_COUNT_CTOR(nsDisplayScrollInfoLayer);
|
|
#endif
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayScrollInfoLayer::~nsDisplayScrollInfoLayer()
|
|
{
|
|
MOZ_COUNT_DTOR(nsDisplayScrollInfoLayer);
|
|
}
|
|
#endif
|
|
|
|
LayerState
|
|
nsDisplayScrollInfoLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager)
|
|
{
|
|
return LAYER_ACTIVE_EMPTY;
|
|
}
|
|
|
|
bool
|
|
nsDisplayScrollInfoLayer::TryMerge(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsDisplayScrollInfoLayer::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
// Layer metadata for a particular scroll frame needs to be unique. Only
|
|
// one nsDisplayScrollLayer (with rendered content) or one
|
|
// nsDisplayScrollInfoLayer (with only the metadata) should survive the
|
|
// visibility computation.
|
|
return RemoveScrollLayerCount() == 1;
|
|
}
|
|
|
|
nsDisplayClip::nsDisplayClip(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayItem* aItem,
|
|
const nsRect& aRect)
|
|
: nsDisplayWrapList(aBuilder, aFrame, aItem) {
|
|
MOZ_COUNT_CTOR(nsDisplayClip);
|
|
mClip = SnapBounds(aBuilder->IsSnappingEnabled() && !aBuilder->IsInTransform(),
|
|
aBuilder->CurrentPresContext(), aRect);
|
|
}
|
|
|
|
nsDisplayClip::nsDisplayClip(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList,
|
|
const nsRect& aRect)
|
|
: nsDisplayWrapList(aBuilder, aFrame, aList) {
|
|
MOZ_COUNT_CTOR(nsDisplayClip);
|
|
mClip = SnapBounds(aBuilder->IsSnappingEnabled() && !aBuilder->IsInTransform(),
|
|
aBuilder->CurrentPresContext(), aRect);
|
|
}
|
|
|
|
nsRect nsDisplayClip::GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
nsRect r = nsDisplayWrapList::GetBounds(aBuilder);
|
|
r.IntersectRect(mClip, r);
|
|
return r;
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayClip::~nsDisplayClip() {
|
|
MOZ_COUNT_DTOR(nsDisplayClip);
|
|
}
|
|
#endif
|
|
|
|
void nsDisplayClip::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
NS_ERROR("nsDisplayClip should have been flattened away for painting");
|
|
}
|
|
|
|
bool nsDisplayClip::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
nsRegion clipped;
|
|
clipped.And(*aVisibleRegion, mClip);
|
|
|
|
nsRegion finalClipped(clipped);
|
|
nsRect allowExpansion;
|
|
allowExpansion.IntersectRect(mClip, aAllowVisibleRegionExpansion);
|
|
bool anyVisible =
|
|
nsDisplayWrapList::ComputeVisibility(aBuilder, &finalClipped,
|
|
allowExpansion);
|
|
|
|
nsRegion removed;
|
|
removed.Sub(clipped, finalClipped);
|
|
aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
|
|
|
|
return anyVisible;
|
|
}
|
|
|
|
bool nsDisplayClip::TryMerge(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem) {
|
|
if (aItem->GetType() != TYPE_CLIP)
|
|
return false;
|
|
nsDisplayClip* other = static_cast<nsDisplayClip*>(aItem);
|
|
if (!other->mClip.IsEqualInterior(mClip))
|
|
return false;
|
|
mList.AppendToBottom(&other->mList);
|
|
return true;
|
|
}
|
|
|
|
nsDisplayWrapList* nsDisplayClip::WrapWithClone(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem) {
|
|
return new (aBuilder)
|
|
nsDisplayClip(aBuilder, aItem->GetUnderlyingFrame(), aItem, mClip);
|
|
}
|
|
|
|
nsDisplayClipRoundedRect::nsDisplayClipRoundedRect(
|
|
nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
|
|
nsDisplayItem* aItem,
|
|
const nsRect& aRect, nscoord aRadii[8])
|
|
: nsDisplayClip(aBuilder, aFrame, aItem, aRect)
|
|
{
|
|
MOZ_COUNT_CTOR(nsDisplayClipRoundedRect);
|
|
memcpy(mRadii, aRadii, sizeof(mRadii));
|
|
}
|
|
|
|
nsDisplayClipRoundedRect::nsDisplayClipRoundedRect(
|
|
nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
|
|
nsDisplayList* aList,
|
|
const nsRect& aRect, nscoord aRadii[8])
|
|
: nsDisplayClip(aBuilder, aFrame, aList, aRect)
|
|
{
|
|
MOZ_COUNT_CTOR(nsDisplayClipRoundedRect);
|
|
memcpy(mRadii, aRadii, sizeof(mRadii));
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayClipRoundedRect::~nsDisplayClipRoundedRect()
|
|
{
|
|
MOZ_COUNT_DTOR(nsDisplayClipRoundedRect);
|
|
}
|
|
#endif
|
|
|
|
nsRegion
|
|
nsDisplayClipRoundedRect::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aForceTransparentSurface)
|
|
{
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
return nsRegion();
|
|
}
|
|
|
|
void
|
|
nsDisplayClipRoundedRect::HitTest(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aRect, HitTestState* aState,
|
|
nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
if (!RoundedRectIntersectsRect(mClip, mRadii, aRect)) {
|
|
// aRect doesn't intersect our border-radius curve.
|
|
|
|
// FIXME: This isn't quite sufficient for aRect having nontrivial
|
|
// size (which is the unusual case here), since it's possible that
|
|
// the part of aRect that intersects the the rounded rect isn't the
|
|
// part that intersects the items in mList.
|
|
return;
|
|
}
|
|
|
|
mList.HitTest(aBuilder, aRect, aState, aOutFrames);
|
|
}
|
|
|
|
nsDisplayWrapList*
|
|
nsDisplayClipRoundedRect::WrapWithClone(nsDisplayListBuilder* aBuilder,
|
|
nsDisplayItem* aItem) {
|
|
return new (aBuilder)
|
|
nsDisplayClipRoundedRect(aBuilder, aItem->GetUnderlyingFrame(), aItem,
|
|
mClip, mRadii);
|
|
}
|
|
|
|
bool nsDisplayClipRoundedRect::ComputeVisibility(
|
|
nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion)
|
|
{
|
|
nsRegion clipped;
|
|
clipped.And(*aVisibleRegion, mClip);
|
|
|
|
return nsDisplayWrapList::ComputeVisibility(aBuilder, &clipped, nsRect());
|
|
// FIXME: Remove a *conservative* opaque region from aVisibleRegion
|
|
// (like in nsDisplayClip::ComputeVisibility).
|
|
}
|
|
|
|
bool nsDisplayClipRoundedRect::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem)
|
|
{
|
|
if (aItem->GetType() != TYPE_CLIP_ROUNDED_RECT)
|
|
return false;
|
|
nsDisplayClipRoundedRect* other =
|
|
static_cast<nsDisplayClipRoundedRect*>(aItem);
|
|
if (!mClip.IsEqualInterior(other->mClip) ||
|
|
memcmp(mRadii, other->mRadii, sizeof(mRadii)) != 0)
|
|
return false;
|
|
mList.AppendToBottom(&other->mList);
|
|
return true;
|
|
}
|
|
|
|
nsDisplayZoom::nsDisplayZoom(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList,
|
|
PRInt32 aAPD, PRInt32 aParentAPD)
|
|
: nsDisplayOwnLayer(aBuilder, aFrame, aList), mAPD(aAPD),
|
|
mParentAPD(aParentAPD) {
|
|
MOZ_COUNT_CTOR(nsDisplayZoom);
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplayZoom::~nsDisplayZoom() {
|
|
MOZ_COUNT_DTOR(nsDisplayZoom);
|
|
}
|
|
#endif
|
|
|
|
nsRect nsDisplayZoom::GetBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsRect bounds = nsDisplayWrapList::GetBounds(aBuilder);
|
|
return bounds.ConvertAppUnitsRoundOut(mAPD, mParentAPD);
|
|
}
|
|
|
|
void nsDisplayZoom::HitTest(nsDisplayListBuilder *aBuilder,
|
|
const nsRect& aRect,
|
|
HitTestState *aState,
|
|
nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
nsRect rect;
|
|
// A 1x1 rect indicates we are just hit testing a point, so pass down a 1x1
|
|
// rect as well instead of possibly rounding the width or height to zero.
|
|
if (aRect.width == 1 && aRect.height == 1) {
|
|
rect.MoveTo(aRect.TopLeft().ConvertAppUnits(mParentAPD, mAPD));
|
|
rect.width = rect.height = 1;
|
|
} else {
|
|
rect = aRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD);
|
|
}
|
|
mList.HitTest(aBuilder, rect, aState, aOutFrames);
|
|
}
|
|
|
|
void nsDisplayZoom::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx)
|
|
{
|
|
mList.PaintForFrame(aBuilder, aCtx, mFrame, nsDisplayList::PAINT_DEFAULT);
|
|
}
|
|
|
|
bool nsDisplayZoom::ComputeVisibility(nsDisplayListBuilder *aBuilder,
|
|
nsRegion *aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion)
|
|
{
|
|
// Convert the passed in visible region to our appunits.
|
|
nsRegion visibleRegion =
|
|
aVisibleRegion->ConvertAppUnitsRoundOut(mParentAPD, mAPD);
|
|
nsRegion originalVisibleRegion = visibleRegion;
|
|
|
|
nsRect transformedVisibleRect =
|
|
mVisibleRect.ConvertAppUnitsRoundOut(mParentAPD, mAPD);
|
|
nsRect allowExpansion =
|
|
aAllowVisibleRegionExpansion.ConvertAppUnitsRoundIn(mParentAPD, mAPD);
|
|
bool retval =
|
|
mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion,
|
|
transformedVisibleRect,
|
|
allowExpansion);
|
|
|
|
nsRegion removed;
|
|
// removed = originalVisibleRegion - visibleRegion
|
|
removed.Sub(originalVisibleRegion, visibleRegion);
|
|
// Convert removed region to parent appunits.
|
|
removed = removed.ConvertAppUnitsRoundIn(mAPD, mParentAPD);
|
|
// aVisibleRegion = aVisibleRegion - removed (modulo any simplifications
|
|
// SubtractFromVisibleRegion does)
|
|
aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
|
|
|
|
return retval;
|
|
}
|
|
|
|
///////////////////////////////////////////////////
|
|
// nsDisplayTransform Implementation
|
|
//
|
|
|
|
// Write #define UNIFIED_CONTINUATIONS here to have the transform property try
|
|
// to transform content with continuations as one unified block instead of
|
|
// several smaller ones. This is currently disabled because it doesn't work
|
|
// correctly, since when the frames are initially being reflowed, their
|
|
// continuations all compute their bounding rects independently of each other
|
|
// and consequently get the wrong value. Write #define DEBUG_HIT here to have
|
|
// the nsDisplayTransform class dump out a bunch of information about hit
|
|
// detection.
|
|
#undef UNIFIED_CONTINUATIONS
|
|
#undef DEBUG_HIT
|
|
|
|
/* Returns the bounds of a frame as defined for transforms. If
|
|
* UNIFIED_CONTINUATIONS is not defined, this is simply the frame's bounding
|
|
* rectangle, translated to the origin. Otherwise, returns the smallest
|
|
* rectangle containing a frame and all of its continuations. For example, if
|
|
* there is a <span> element with several continuations split over several
|
|
* lines, this function will return the rectangle containing all of those
|
|
* continuations. This rectangle is relative to the origin of the frame's local
|
|
* coordinate space.
|
|
*/
|
|
#ifndef UNIFIED_CONTINUATIONS
|
|
|
|
nsRect
|
|
nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!");
|
|
return nsRect(nsPoint(0, 0), aFrame->GetSize());
|
|
}
|
|
|
|
#else
|
|
|
|
nsRect
|
|
nsDisplayTransform::GetFrameBoundsForTransform(const nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't get the bounds of a nonexistent frame!");
|
|
|
|
nsRect result;
|
|
|
|
/* Iterate through the continuation list, unioning together all the
|
|
* bounding rects.
|
|
*/
|
|
for (const nsIFrame *currFrame = aFrame->GetFirstContinuation();
|
|
currFrame != nsnull;
|
|
currFrame = currFrame->GetNextContinuation())
|
|
{
|
|
/* Get the frame rect in local coordinates, then translate back to the
|
|
* original coordinates.
|
|
*/
|
|
result.UnionRect(result, nsRect(currFrame->GetOffsetTo(aFrame),
|
|
currFrame->GetSize()));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Returns the delta specified by the -moz-transform-origin property.
|
|
* This is a positive delta, meaning that it indicates the direction to move
|
|
* to get from (0, 0) of the frame to the transform origin.
|
|
*/
|
|
static
|
|
gfxPoint3D GetDeltaToMozTransformOrigin(const nsIFrame* aFrame,
|
|
float aAppUnitsPerPixel,
|
|
const nsRect* aBoundsOverride)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
|
|
NS_PRECONDITION(aFrame->GetStyleDisplay()->HasTransform(),
|
|
"Can't get a delta for an untransformed frame!");
|
|
|
|
/* For both of the coordinates, if the value of -moz-transform is a
|
|
* percentage, it's relative to the size of the frame. Otherwise, if it's
|
|
* a distance, it's already computed for us!
|
|
*/
|
|
const nsStyleDisplay* display = aFrame->GetStyleDisplay();
|
|
nsRect boundingRect = (aBoundsOverride ? *aBoundsOverride :
|
|
nsDisplayTransform::GetFrameBoundsForTransform(aFrame));
|
|
|
|
/* Allows us to access named variables by index. */
|
|
gfxPoint3D result;
|
|
gfxFloat* coords[3] = {&result.x, &result.y, &result.z};
|
|
const nscoord* dimensions[2] =
|
|
{&boundingRect.width, &boundingRect.height};
|
|
|
|
for (PRUint8 index = 0; index < 2; ++index) {
|
|
/* If the -moz-transform-origin specifies a percentage, take the percentage
|
|
* of the size of the box.
|
|
*/
|
|
const nsStyleCoord &coord = display->mTransformOrigin[index];
|
|
if (coord.GetUnit() == eStyleUnit_Calc) {
|
|
const nsStyleCoord::Calc *calc = coord.GetCalcValue();
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
|
|
calc->mPercent +
|
|
NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
|
|
} else if (coord.GetUnit() == eStyleUnit_Percent) {
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
|
|
coord.GetPercentValue();
|
|
} else {
|
|
NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel);
|
|
}
|
|
}
|
|
|
|
*coords[2] = NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(),
|
|
aAppUnitsPerPixel);
|
|
/* Adjust based on the origin of the rectangle. */
|
|
result.x += NSAppUnitsToFloatPixels(boundingRect.x, aAppUnitsPerPixel);
|
|
result.y += NSAppUnitsToFloatPixels(boundingRect.y, aAppUnitsPerPixel);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Returns the delta specified by the -moz-perspective-origin property.
|
|
* This is a positive delta, meaning that it indicates the direction to move
|
|
* to get from (0, 0) of the frame to the perspective origin.
|
|
*/
|
|
static
|
|
gfxPoint3D GetDeltaToMozPerspectiveOrigin(const nsIFrame* aFrame,
|
|
float aAppUnitsPerPixel,
|
|
const nsRect* aBoundsOverride)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
|
|
NS_PRECONDITION(aFrame->GetStyleDisplay()->HasTransform(),
|
|
"Can't get a delta for an untransformed frame!");
|
|
NS_PRECONDITION(aFrame->GetParentStyleContextFrame(),
|
|
"Can't get delta without a style parent!");
|
|
|
|
/* For both of the coordinates, if the value of -moz-perspective-origin is a
|
|
* percentage, it's relative to the size of the frame. Otherwise, if it's
|
|
* a distance, it's already computed for us!
|
|
*/
|
|
|
|
//TODO: Should this be using our bounds or the parent's bounds?
|
|
// How do we handle aBoundsOverride in the latter case?
|
|
nsIFrame* parent = aFrame->GetParentStyleContextFrame();
|
|
const nsStyleDisplay* display = aFrame->GetParent()->GetStyleDisplay();
|
|
nsRect boundingRect = (aBoundsOverride ? *aBoundsOverride :
|
|
nsDisplayTransform::GetFrameBoundsForTransform(parent));
|
|
|
|
/* Allows us to access named variables by index. */
|
|
gfxPoint3D result;
|
|
result.z = 0.0f;
|
|
gfxFloat* coords[2] = {&result.x, &result.y};
|
|
const nscoord* dimensions[2] =
|
|
{&boundingRect.width, &boundingRect.height};
|
|
|
|
for (PRUint8 index = 0; index < 2; ++index) {
|
|
/* If the -moz-transform-origin specifies a percentage, take the percentage
|
|
* of the size of the box.
|
|
*/
|
|
const nsStyleCoord &coord = display->mPerspectiveOrigin[index];
|
|
if (coord.GetUnit() == eStyleUnit_Calc) {
|
|
const nsStyleCoord::Calc *calc = coord.GetCalcValue();
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
|
|
calc->mPercent +
|
|
NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
|
|
} else if (coord.GetUnit() == eStyleUnit_Percent) {
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(*dimensions[index], aAppUnitsPerPixel) *
|
|
coord.GetPercentValue();
|
|
} else {
|
|
NS_ABORT_IF_FALSE(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
|
|
*coords[index] =
|
|
NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel);
|
|
}
|
|
}
|
|
|
|
nsPoint parentOffset = aFrame->GetOffsetTo(parent);
|
|
gfxPoint3D gfxOffset(
|
|
NSAppUnitsToFloatPixels(parentOffset.x, aAppUnitsPerPixel),
|
|
NSAppUnitsToFloatPixels(parentOffset.y, aAppUnitsPerPixel),
|
|
0.0f);
|
|
|
|
return result - gfxOffset;
|
|
}
|
|
|
|
/* Wraps up the -moz-transform matrix in a change-of-basis matrix pair that
|
|
* translates from local coordinate space to transform coordinate space, then
|
|
* hands it back.
|
|
*/
|
|
gfx3DMatrix
|
|
nsDisplayTransform::GetResultingTransformMatrix(const nsIFrame* aFrame,
|
|
const nsPoint &aOrigin,
|
|
float aAppUnitsPerPixel,
|
|
const nsRect* aBoundsOverride,
|
|
nsIFrame** aOutAncestor)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Cannot get transform matrix for a null frame!");
|
|
|
|
if (aOutAncestor) {
|
|
*aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
|
|
}
|
|
|
|
/* Account for the -moz-transform-origin property by translating the
|
|
* coordinate space to the new origin.
|
|
*/
|
|
gfxPoint3D toMozOrigin =
|
|
GetDeltaToMozTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride);
|
|
gfxPoint3D newOrigin =
|
|
gfxPoint3D(NSAppUnitsToFloatPixels(aOrigin.x, aAppUnitsPerPixel),
|
|
NSAppUnitsToFloatPixels(aOrigin.y, aAppUnitsPerPixel),
|
|
0.0f);
|
|
|
|
/* Get the underlying transform matrix. This requires us to get the
|
|
* bounds of the frame.
|
|
*/
|
|
const nsStyleDisplay* disp = aFrame->GetStyleDisplay();
|
|
nsRect bounds = (aBoundsOverride ? *aBoundsOverride :
|
|
nsDisplayTransform::GetFrameBoundsForTransform(aFrame));
|
|
|
|
/* Get the matrix, then change its basis to factor in the origin. */
|
|
bool dummy;
|
|
gfx3DMatrix result;
|
|
/* Transformed frames always have a transform, or are preserving 3d (and might still have perspective!) */
|
|
if (disp->mSpecifiedTransform) {
|
|
result = nsStyleTransformMatrix::ReadTransforms(disp->mSpecifiedTransform,
|
|
aFrame->GetStyleContext(),
|
|
aFrame->PresContext(),
|
|
dummy, bounds, aAppUnitsPerPixel);
|
|
} else {
|
|
NS_ASSERTION(aFrame->GetStyleDisplay()->mTransformStyle == NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D,
|
|
"If we don't have a transform, then we must be at least attempting to preserve the transforms of our children");
|
|
}
|
|
|
|
const nsStyleDisplay* parentDisp = nsnull;
|
|
nsStyleContext* parentStyleContext = aFrame->GetStyleContext()->GetParent();
|
|
if (parentStyleContext) {
|
|
parentDisp = parentStyleContext->GetStyleDisplay();
|
|
}
|
|
if (nsLayoutUtils::Are3DTransformsEnabled() &&
|
|
parentDisp && parentDisp->mChildPerspective.GetUnit() == eStyleUnit_Coord &&
|
|
parentDisp->mChildPerspective.GetCoordValue() > 0.0) {
|
|
gfx3DMatrix perspective;
|
|
perspective._34 =
|
|
-1.0 / NSAppUnitsToFloatPixels(parentDisp->mChildPerspective.GetCoordValue(),
|
|
aAppUnitsPerPixel);
|
|
/* At the point when perspective is applied, we have been translated to the transform origin.
|
|
* The translation to the perspective origin is the difference between these values.
|
|
*/
|
|
gfxPoint3D toPerspectiveOrigin = GetDeltaToMozPerspectiveOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride);
|
|
result = result * nsLayoutUtils::ChangeMatrixBasis(toPerspectiveOrigin - toMozOrigin, perspective);
|
|
}
|
|
|
|
if (aFrame->Preserves3D() && nsLayoutUtils::Are3DTransformsEnabled()) {
|
|
// Include the transform set on our parent
|
|
NS_ASSERTION(aFrame->GetParent() &&
|
|
aFrame->GetParent()->IsTransformed() &&
|
|
aFrame->GetParent()->Preserves3DChildren(),
|
|
"Preserve3D mismatch!");
|
|
gfx3DMatrix parent = GetResultingTransformMatrix(aFrame->GetParent(), aOrigin - aFrame->GetPosition(),
|
|
aAppUnitsPerPixel, nsnull, aOutAncestor);
|
|
return nsLayoutUtils::ChangeMatrixBasis(newOrigin + toMozOrigin, result) * parent;
|
|
}
|
|
|
|
return nsLayoutUtils::ChangeMatrixBasis
|
|
(newOrigin + toMozOrigin, result);
|
|
}
|
|
|
|
bool
|
|
nsDisplayTransform::ShouldPrerenderTransformedContent(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->AreLayersMarkedActive(nsChangeHint_UpdateTransformLayer)) {
|
|
nsSize refSize = aBuilder->ReferenceFrame()->GetSize();
|
|
// Only prerender if the transformed frame's size is <= the
|
|
// reference frame size (~viewport), allowing a 1/8th fuzz factor
|
|
// for shadows, borders, etc.
|
|
refSize += nsSize(refSize.width / 8, refSize.height / 8);
|
|
return aFrame->GetVisualOverflowRectRelativeToSelf().Size() <= refSize;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* If the matrix is singular, or a hidden backface is shown, the frame won't be visible or hit. */
|
|
static bool IsFrameVisible(nsIFrame* aFrame, const gfx3DMatrix& aMatrix)
|
|
{
|
|
if (aMatrix.IsSingular()) {
|
|
return false;
|
|
}
|
|
if (aFrame->GetStyleDisplay()->mBackfaceVisibility == NS_STYLE_BACKFACE_VISIBILITY_HIDDEN &&
|
|
aMatrix.IsBackfaceVisible()) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const gfx3DMatrix&
|
|
nsDisplayTransform::GetTransform(float aAppUnitsPerPixel)
|
|
{
|
|
if (mTransform.IsIdentity() || mCachedAppUnitsPerPixel != aAppUnitsPerPixel) {
|
|
mTransform =
|
|
GetResultingTransformMatrix(mFrame, ToReferenceFrame(),
|
|
aAppUnitsPerPixel,
|
|
nsnull);
|
|
mCachedAppUnitsPerPixel = aAppUnitsPerPixel;
|
|
}
|
|
return mTransform;
|
|
}
|
|
|
|
already_AddRefed<Layer> nsDisplayTransform::BuildLayer(nsDisplayListBuilder *aBuilder,
|
|
LayerManager *aManager,
|
|
const ContainerParameters& aContainerParameters)
|
|
{
|
|
const gfx3DMatrix& newTransformMatrix =
|
|
GetTransform(mFrame->PresContext()->AppUnitsPerDevPixel());
|
|
|
|
if (!IsFrameVisible(mFrame, newTransformMatrix)) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsRefPtr<ContainerLayer> container = aBuilder->LayerBuilder()->
|
|
BuildContainerLayerFor(aBuilder, aManager, mFrame, this, *mStoredList.GetList(),
|
|
aContainerParameters, &newTransformMatrix);
|
|
|
|
// Add the preserve-3d flag for this layer, BuildContainerLayerFor clears all flags,
|
|
// so we never need to explicitely unset this flag.
|
|
if (mFrame->Preserves3D() || mFrame->Preserves3DChildren()) {
|
|
container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_PRESERVE_3D);
|
|
}
|
|
return container.forget();
|
|
}
|
|
|
|
nsDisplayItem::LayerState
|
|
nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder,
|
|
LayerManager* aManager) {
|
|
// Here we check if the *post-transform* bounds of this item are big enough
|
|
// to justify an active layer.
|
|
if (mFrame->AreLayersMarkedActive(nsChangeHint_UpdateTransformLayer) &&
|
|
!IsItemTooSmallForActiveLayer(this))
|
|
return LAYER_ACTIVE;
|
|
if (!GetTransform(mFrame->PresContext()->AppUnitsPerDevPixel()).Is2D() || mFrame->Preserves3D())
|
|
return LAYER_ACTIVE;
|
|
nsIFrame* activeScrolledRoot =
|
|
nsLayoutUtils::GetActiveScrolledRootFor(mFrame, nsnull);
|
|
return !mStoredList.ChildrenCanBeInactive(aBuilder,
|
|
aManager,
|
|
*mStoredList.GetList(),
|
|
activeScrolledRoot)
|
|
? LAYER_ACTIVE : LAYER_INACTIVE;
|
|
}
|
|
|
|
bool nsDisplayTransform::ComputeVisibility(nsDisplayListBuilder *aBuilder,
|
|
nsRegion *aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion)
|
|
{
|
|
/* As we do this, we need to be sure to
|
|
* untransform the visible rect, since we want everything that's painting to
|
|
* think that it's painting in its original rectangular coordinate space.
|
|
* If we can't untransform, take the entire overflow rect */
|
|
nsRect untransformedVisibleRect;
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
if (ShouldPrerenderTransformedContent(aBuilder, mFrame) ||
|
|
!UntransformRectMatrix(mVisibleRect,
|
|
GetTransform(factor),
|
|
factor,
|
|
&untransformedVisibleRect))
|
|
{
|
|
untransformedVisibleRect = mFrame->GetVisualOverflowRectRelativeToSelf() +
|
|
aBuilder->ToReferenceFrame(mFrame);
|
|
}
|
|
nsRegion untransformedVisible = untransformedVisibleRect;
|
|
// Call RecomputeVisiblity instead of ComputeVisibility since
|
|
// nsDisplayItem::ComputeVisibility should only be called from
|
|
// nsDisplayList::ComputeVisibility (which sets mVisibleRect on the item)
|
|
mStoredList.RecomputeVisibility(aBuilder, &untransformedVisible);
|
|
return true;
|
|
}
|
|
|
|
#ifdef DEBUG_HIT
|
|
#include <time.h>
|
|
#endif
|
|
|
|
/* HitTest does some fun stuff with matrix transforms to obtain the answer. */
|
|
void nsDisplayTransform::HitTest(nsDisplayListBuilder *aBuilder,
|
|
const nsRect& aRect,
|
|
HitTestState *aState,
|
|
nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
/* Here's how this works:
|
|
* 1. Get the matrix. If it's singular, abort (clearly we didn't hit
|
|
* anything).
|
|
* 2. Invert the matrix.
|
|
* 3. Use it to transform the rect into the correct space.
|
|
* 4. Pass that rect down through to the list's version of HitTest.
|
|
*/
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
gfx3DMatrix matrix = GetTransform(factor);
|
|
|
|
if (!IsFrameVisible(mFrame, matrix)) {
|
|
return;
|
|
}
|
|
|
|
/* We want to go from transformed-space to regular space.
|
|
* Thus we have to invert the matrix, which normally does
|
|
* the reverse operation (e.g. regular->transformed)
|
|
*/
|
|
|
|
/* Now, apply the transform and pass it down the channel. */
|
|
nsRect resultingRect;
|
|
if (aRect.width == 1 && aRect.height == 1) {
|
|
// Magic width/height indicating we're hit testing a point, not a rect
|
|
gfxPoint point = matrix.Inverse().ProjectPoint(
|
|
gfxPoint(NSAppUnitsToFloatPixels(aRect.x, factor),
|
|
NSAppUnitsToFloatPixels(aRect.y, factor)));
|
|
|
|
resultingRect = nsRect(NSFloatPixelsToAppUnits(float(point.x), factor),
|
|
NSFloatPixelsToAppUnits(float(point.y), factor),
|
|
1, 1);
|
|
|
|
} else {
|
|
gfxRect originalRect(NSAppUnitsToFloatPixels(aRect.x, factor),
|
|
NSAppUnitsToFloatPixels(aRect.y, factor),
|
|
NSAppUnitsToFloatPixels(aRect.width, factor),
|
|
NSAppUnitsToFloatPixels(aRect.height, factor));
|
|
|
|
gfxRect rect = matrix.Inverse().ProjectRectBounds(originalRect);;
|
|
|
|
resultingRect = nsRect(NSFloatPixelsToAppUnits(float(rect.X()), factor),
|
|
NSFloatPixelsToAppUnits(float(rect.Y()), factor),
|
|
NSFloatPixelsToAppUnits(float(rect.Width()), factor),
|
|
NSFloatPixelsToAppUnits(float(rect.Height()), factor));
|
|
}
|
|
|
|
|
|
#ifdef DEBUG_HIT
|
|
printf("Frame: %p\n", dynamic_cast<void *>(mFrame));
|
|
printf(" Untransformed point: (%f, %f)\n", resultingRect.X(), resultingRect.Y());
|
|
PRUint32 originalFrameCount = aOutFrames.Length();
|
|
#endif
|
|
|
|
mStoredList.HitTest(aBuilder, resultingRect, aState, aOutFrames);
|
|
|
|
#ifdef DEBUG_HIT
|
|
if (originalFrameCount != aOutFrames.Length())
|
|
printf(" Hit! Time: %f, first frame: %p\n", static_cast<double>(clock()),
|
|
dynamic_cast<void *>(aOutFrames.ElementAt(0)));
|
|
printf("=== end of hit test ===\n");
|
|
#endif
|
|
|
|
}
|
|
|
|
float
|
|
nsDisplayTransform::GetHitDepthAtPoint(const nsPoint& aPoint)
|
|
{
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
gfx3DMatrix matrix = GetTransform(factor);
|
|
|
|
NS_ASSERTION(IsFrameVisible(mFrame, matrix), "We can't have hit a frame that isn't visible!");
|
|
|
|
gfxPoint point =
|
|
matrix.Inverse().ProjectPoint(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, factor),
|
|
NSAppUnitsToFloatPixels(aPoint.y, factor)));
|
|
|
|
gfxPoint3D transformed = matrix.Transform3D(gfxPoint3D(point.x, point.y, 0));
|
|
return transformed.z;
|
|
}
|
|
|
|
/* The bounding rectangle for the object is the overflow rectangle translated
|
|
* by the reference point.
|
|
*/
|
|
nsRect nsDisplayTransform::GetBounds(nsDisplayListBuilder *aBuilder)
|
|
{
|
|
nsRect untransformedBounds =
|
|
ShouldPrerenderTransformedContent(aBuilder, mFrame) ?
|
|
mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame() :
|
|
mStoredList.GetBounds(aBuilder);
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
return nsLayoutUtils::MatrixTransformRect(untransformedBounds,
|
|
GetTransform(factor),
|
|
factor);
|
|
}
|
|
|
|
/* The transform is opaque iff the transform consists solely of scales and
|
|
* translations and if the underlying content is opaque. Thus if the transform
|
|
* is of the form
|
|
*
|
|
* |a c e|
|
|
* |b d f|
|
|
* |0 0 1|
|
|
*
|
|
* We need b and c to be zero.
|
|
*
|
|
* We also need to check whether the underlying opaque content completely fills
|
|
* our visible rect. We use UntransformRect which expands to the axis-aligned
|
|
* bounding rect, but that's OK since if
|
|
* mStoredList.GetVisibleRect().Contains(untransformedVisible), then it
|
|
* certainly contains the actual (non-axis-aligned) untransformed rect.
|
|
*/
|
|
nsRegion nsDisplayTransform::GetOpaqueRegion(nsDisplayListBuilder *aBuilder,
|
|
bool* aForceTransparentSurface)
|
|
{
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
nsRect untransformedVisible;
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
if (!UntransformRectMatrix(mVisibleRect, GetTransform(factor), factor, &untransformedVisible)) {
|
|
return nsRegion();
|
|
}
|
|
|
|
const gfx3DMatrix& matrix = GetTransform(nsPresContext::AppUnitsPerCSSPixel());
|
|
|
|
nsRegion result;
|
|
gfxMatrix matrix2d;
|
|
if (matrix.Is2D(&matrix2d) &&
|
|
matrix2d.PreservesAxisAlignedRectangles() &&
|
|
mStoredList.GetOpaqueRegion(aBuilder).Contains(untransformedVisible)) {
|
|
result = mVisibleRect;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* The transform is uniform if it fills the entire bounding rect and the
|
|
* wrapped list is uniform. See GetOpaqueRegion for discussion of why this
|
|
* works.
|
|
*/
|
|
bool nsDisplayTransform::IsUniform(nsDisplayListBuilder *aBuilder, nscolor* aColor)
|
|
{
|
|
nsRect untransformedVisible;
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
if (!UntransformRectMatrix(mVisibleRect, GetTransform(factor), factor, &untransformedVisible)) {
|
|
return false;
|
|
}
|
|
const gfx3DMatrix& matrix = GetTransform(nsPresContext::AppUnitsPerCSSPixel());
|
|
|
|
gfxMatrix matrix2d;
|
|
return matrix.Is2D(&matrix2d) &&
|
|
matrix2d.PreservesAxisAlignedRectangles() &&
|
|
mStoredList.GetVisibleRect().Contains(untransformedVisible) &&
|
|
mStoredList.IsUniform(aBuilder, aColor);
|
|
}
|
|
|
|
/* If UNIFIED_CONTINUATIONS is defined, we can merge two display lists that
|
|
* share the same underlying content. Otherwise, doing so results in graphical
|
|
* glitches.
|
|
*/
|
|
#ifndef UNIFIED_CONTINUATIONS
|
|
|
|
bool
|
|
nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder,
|
|
nsDisplayItem *aItem)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#else
|
|
|
|
bool
|
|
nsDisplayTransform::TryMerge(nsDisplayListBuilder *aBuilder,
|
|
nsDisplayItem *aItem)
|
|
{
|
|
NS_PRECONDITION(aItem, "Why did you try merging with a null item?");
|
|
NS_PRECONDITION(aBuilder, "Why did you try merging with a null builder?");
|
|
|
|
/* Make sure that we're dealing with two transforms. */
|
|
if (aItem->GetType() != TYPE_TRANSFORM)
|
|
return false;
|
|
|
|
/* Check to see that both frames are part of the same content. */
|
|
if (aItem->GetUnderlyingFrame()->GetContent() != mFrame->GetContent())
|
|
return false;
|
|
|
|
/* Now, move everything over to this frame and signal that
|
|
* we merged things!
|
|
*/
|
|
mStoredList.GetList()->
|
|
AppendToBottom(&static_cast<nsDisplayTransform *>(aItem)->mStoredList);
|
|
return true;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* TransformRect takes in as parameters a rectangle (in app space) and returns
|
|
* the smallest rectangle (in app space) containing the transformed image of
|
|
* that rectangle. That is, it takes the four corners of the rectangle,
|
|
* transforms them according to the matrix associated with the specified frame,
|
|
* then returns the smallest rectangle containing the four transformed points.
|
|
*
|
|
* @param aUntransformedBounds The rectangle (in app units) to transform.
|
|
* @param aFrame The frame whose transformation should be applied.
|
|
* @param aOrigin The delta from the frame origin to the coordinate space origin
|
|
* @param aBoundsOverride (optional) Force the frame bounds to be the
|
|
* specified bounds.
|
|
* @return The smallest rectangle containing the image of the transformed
|
|
* rectangle.
|
|
*/
|
|
nsRect nsDisplayTransform::TransformRect(const nsRect &aUntransformedBounds,
|
|
const nsIFrame* aFrame,
|
|
const nsPoint &aOrigin,
|
|
const nsRect* aBoundsOverride)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
|
|
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
return nsLayoutUtils::MatrixTransformRect
|
|
(aUntransformedBounds,
|
|
GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride),
|
|
factor);
|
|
}
|
|
|
|
nsRect nsDisplayTransform::TransformRectOut(const nsRect &aUntransformedBounds,
|
|
const nsIFrame* aFrame,
|
|
const nsPoint &aOrigin,
|
|
const nsRect* aBoundsOverride)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
|
|
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
return nsLayoutUtils::MatrixTransformRectOut
|
|
(aUntransformedBounds,
|
|
GetResultingTransformMatrix(aFrame, aOrigin, factor, aBoundsOverride),
|
|
factor);
|
|
}
|
|
|
|
bool nsDisplayTransform::UntransformRectMatrix(const nsRect &aUntransformedBounds,
|
|
const gfx3DMatrix& aMatrix,
|
|
float aAppUnitsPerPixel,
|
|
nsRect *aOutRect)
|
|
{
|
|
if (aMatrix.IsSingular())
|
|
return false;
|
|
|
|
gfxRect result(NSAppUnitsToFloatPixels(aUntransformedBounds.x, aAppUnitsPerPixel),
|
|
NSAppUnitsToFloatPixels(aUntransformedBounds.y, aAppUnitsPerPixel),
|
|
NSAppUnitsToFloatPixels(aUntransformedBounds.width, aAppUnitsPerPixel),
|
|
NSAppUnitsToFloatPixels(aUntransformedBounds.height, aAppUnitsPerPixel));
|
|
|
|
/* We want to untransform the matrix, so invert the transformation first! */
|
|
result = aMatrix.Inverse().ProjectRectBounds(result);
|
|
|
|
*aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(result, aAppUnitsPerPixel);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool nsDisplayTransform::UntransformRect(const nsRect &aUntransformedBounds,
|
|
const nsIFrame* aFrame,
|
|
const nsPoint &aOrigin,
|
|
nsRect* aOutRect)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
|
|
|
|
/* Grab the matrix. If the transform is degenerate, just hand back the
|
|
* empty rect.
|
|
*/
|
|
float factor = nsPresContext::AppUnitsPerCSSPixel();
|
|
gfx3DMatrix matrix = GetResultingTransformMatrix(aFrame, aOrigin, factor, nsnull);
|
|
|
|
return UntransformRectMatrix(aUntransformedBounds, matrix, factor, aOutRect);
|
|
}
|
|
|
|
nsDisplaySVGEffects::nsDisplaySVGEffects(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aFrame, nsDisplayList* aList)
|
|
: nsDisplayWrapList(aBuilder, aFrame, aList), mEffectsFrame(aFrame),
|
|
mBounds(aFrame->GetVisualOverflowRectRelativeToSelf())
|
|
{
|
|
MOZ_COUNT_CTOR(nsDisplaySVGEffects);
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsDisplaySVGEffects::~nsDisplaySVGEffects()
|
|
{
|
|
MOZ_COUNT_DTOR(nsDisplaySVGEffects);
|
|
}
|
|
#endif
|
|
|
|
nsRegion nsDisplaySVGEffects::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
|
|
bool* aForceTransparentSurface)
|
|
{
|
|
if (aForceTransparentSurface) {
|
|
*aForceTransparentSurface = false;
|
|
}
|
|
return nsRegion();
|
|
}
|
|
|
|
void
|
|
nsDisplaySVGEffects::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
|
|
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
|
|
{
|
|
nsPoint rectCenter(aRect.x + aRect.width / 2, aRect.y + aRect.height / 2);
|
|
if (nsSVGIntegrationUtils::HitTestFrameForEffects(mEffectsFrame,
|
|
rectCenter - aBuilder->ToReferenceFrame(mEffectsFrame))) {
|
|
mList.HitTest(aBuilder, aRect, aState, aOutFrames);
|
|
}
|
|
}
|
|
|
|
void nsDisplaySVGEffects::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx)
|
|
{
|
|
nsSVGIntegrationUtils::PaintFramesWithEffects(aCtx,
|
|
mEffectsFrame, mVisibleRect, aBuilder, &mList);
|
|
}
|
|
|
|
bool nsDisplaySVGEffects::ComputeVisibility(nsDisplayListBuilder* aBuilder,
|
|
nsRegion* aVisibleRegion,
|
|
const nsRect& aAllowVisibleRegionExpansion) {
|
|
nsPoint offset = aBuilder->ToReferenceFrame(mEffectsFrame);
|
|
nsRect dirtyRect =
|
|
nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mEffectsFrame,
|
|
mVisibleRect - offset) +
|
|
offset;
|
|
|
|
// Our children may be made translucent or arbitrarily deformed so we should
|
|
// not allow them to subtract area from aVisibleRegion.
|
|
nsRegion childrenVisible(dirtyRect);
|
|
nsRect r;
|
|
r.IntersectRect(dirtyRect, mList.GetBounds(aBuilder));
|
|
mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r, nsRect());
|
|
return true;
|
|
}
|
|
|
|
bool nsDisplaySVGEffects::TryMerge(nsDisplayListBuilder* aBuilder, nsDisplayItem* aItem)
|
|
{
|
|
if (aItem->GetType() != TYPE_SVG_EFFECTS)
|
|
return false;
|
|
// items for the same content element should be merged into a single
|
|
// compositing group
|
|
// aItem->GetUnderlyingFrame() returns non-null because it's nsDisplaySVGEffects
|
|
if (aItem->GetUnderlyingFrame()->GetContent() != mFrame->GetContent())
|
|
return false;
|
|
nsDisplaySVGEffects* other = static_cast<nsDisplaySVGEffects*>(aItem);
|
|
mList.AppendToBottom(&other->mList);
|
|
mBounds.UnionRect(mBounds,
|
|
other->mBounds + other->mEffectsFrame->GetOffsetTo(mEffectsFrame));
|
|
return true;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
void
|
|
nsDisplaySVGEffects::PrintEffects(FILE* aOutput)
|
|
{
|
|
nsIFrame* firstFrame =
|
|
nsLayoutUtils::GetFirstContinuationOrSpecialSibling(mEffectsFrame);
|
|
nsSVGEffects::EffectProperties effectProperties =
|
|
nsSVGEffects::GetEffectProperties(firstFrame);
|
|
bool isOK = true;
|
|
nsSVGClipPathFrame *clipPathFrame = effectProperties.GetClipPathFrame(&isOK);
|
|
bool first = true;
|
|
fprintf(aOutput, " effects=(");
|
|
if (mEffectsFrame->GetStyleDisplay()->mOpacity != 1.0f) {
|
|
first = false;
|
|
fprintf(aOutput, "opacity(%f)", mEffectsFrame->GetStyleDisplay()->mOpacity);
|
|
}
|
|
if (clipPathFrame) {
|
|
if (!first) {
|
|
fprintf(aOutput, ", ");
|
|
}
|
|
fprintf(aOutput, "clip(%s)", clipPathFrame->IsTrivial() ? "trivial" : "non-trivial");
|
|
first = false;
|
|
}
|
|
if (effectProperties.GetFilterFrame(&isOK)) {
|
|
if (!first) {
|
|
fprintf(aOutput, ", ");
|
|
}
|
|
fprintf(aOutput, "filter");
|
|
first = false;
|
|
}
|
|
if (effectProperties.GetMaskFrame(&isOK)) {
|
|
if (!first) {
|
|
fprintf(aOutput, ", ");
|
|
}
|
|
fprintf(aOutput, "mask");
|
|
}
|
|
fprintf(aOutput, ")");
|
|
}
|
|
#endif
|
|
|