mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
6fb1b72c6e
If we always align the new scroll position with the previous scroll position, we can accumulate error and gradually drift out of alignment with the layer pixels until we exceed the tolerance and are forced to rerender everything.
5078 lines
171 KiB
C++
5078 lines
171 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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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "base/basictypes.h"
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#include "mozilla/Util.h"
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#include "nsLayoutUtils.h"
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#include "nsIFormControlFrame.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsFrameList.h"
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#include "nsGkAtoms.h"
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#include "nsIAtom.h"
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#include "nsCSSPseudoElements.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSColorUtils.h"
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#include "nsIView.h"
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#include "nsPlaceholderFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsIDOMEvent.h"
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#include "nsGUIEvent.h"
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#include "nsDisplayList.h"
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#include "nsRegion.h"
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#include "nsFrameManager.h"
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#include "nsBlockFrame.h"
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#include "nsBidiPresUtils.h"
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#include "imgIContainer.h"
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#include "gfxRect.h"
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#include "gfxContext.h"
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#include "gfxFont.h"
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#include "nsRenderingContext.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsCSSRendering.h"
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#include "nsContentUtils.h"
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#include "nsThemeConstants.h"
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#include "nsPIDOMWindow.h"
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#include "nsIBaseWindow.h"
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#include "nsIDocShell.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIWidget.h"
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#include "gfxMatrix.h"
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#include "gfxPoint3D.h"
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#include "gfxTypes.h"
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#include "gfxUserFontSet.h"
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#include "nsTArray.h"
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#include "nsHTMLCanvasElement.h"
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#include "nsICanvasRenderingContextInternal.h"
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#include "gfxPlatform.h"
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#include "nsClientRect.h"
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#ifdef MOZ_MEDIA
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#include "nsHTMLVideoElement.h"
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#endif
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#include "nsHTMLImageElement.h"
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#include "imgIRequest.h"
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#include "nsIImageLoadingContent.h"
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#include "nsCOMPtr.h"
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#include "nsListControlFrame.h"
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#include "ImageLayers.h"
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#include "mozilla/arm.h"
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#include "mozilla/dom/Element.h"
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#include "nsCanvasFrame.h"
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#include "gfxDrawable.h"
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#include "gfxUtils.h"
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#include "nsDataHashtable.h"
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#include "nsTextFrame.h"
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#include "nsFontFaceList.h"
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#include "nsFontInflationData.h"
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#include "nsSVGUtils.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGForeignObjectFrame.h"
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#include "nsSVGOuterSVGFrame.h"
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#include "nsStyleStructInlines.h"
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#include "mozilla/Preferences.h"
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#ifdef MOZ_XUL
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#include "nsXULPopupManager.h"
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#endif
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#include "sampler.h"
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#include "nsAnimationManager.h"
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#include "nsTransitionManager.h"
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using namespace mozilla;
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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using namespace mozilla::layout;
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#ifdef DEBUG
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// TODO: remove, see bug 598468.
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bool nsLayoutUtils::gPreventAssertInCompareTreePosition = false;
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#endif // DEBUG
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typedef gfxPattern::GraphicsFilter GraphicsFilter;
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typedef FrameMetrics::ViewID ViewID;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationEmPerLine;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationMinTwips;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationLineThreshold;
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/* static */ int32_t nsLayoutUtils::sFontSizeInflationMappingIntercept;
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static ViewID sScrollIdCounter = FrameMetrics::START_SCROLL_ID;
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typedef nsDataHashtable<nsUint64HashKey, nsIContent*> ContentMap;
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static ContentMap* sContentMap = NULL;
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static ContentMap& GetContentMap() {
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if (!sContentMap) {
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sContentMap = new ContentMap();
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sContentMap->Init();
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}
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return *sContentMap;
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}
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bool
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nsLayoutUtils::HasAnimationsForCompositor(nsIContent* aContent,
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nsCSSProperty aProperty)
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{
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if (!aContent->MayHaveAnimations())
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return false;
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ElementAnimations* animations =
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static_cast<ElementAnimations*>(aContent->GetProperty(nsGkAtoms::animationsProperty));
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if (animations) {
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bool propertyMatches = animations->HasAnimationOfProperty(aProperty);
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if (propertyMatches && animations->CanPerformOnCompositorThread()) {
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return true;
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}
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}
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ElementTransitions* transitions =
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static_cast<ElementTransitions*>(aContent->GetProperty(nsGkAtoms::transitionsProperty));
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if (transitions) {
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bool propertyMatches = transitions->HasTransitionOfProperty(aProperty);
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if (propertyMatches && transitions->CanPerformOnCompositorThread()) {
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return true;
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}
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}
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return false;
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}
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bool
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nsLayoutUtils::Are3DTransformsEnabled()
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{
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static bool s3DTransformsEnabled;
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static bool s3DTransformPrefCached = false;
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if (!s3DTransformPrefCached) {
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s3DTransformPrefCached = true;
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mozilla::Preferences::AddBoolVarCache(&s3DTransformsEnabled,
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"layout.3d-transforms.enabled");
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}
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return s3DTransformsEnabled;
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}
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bool
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nsLayoutUtils::AreOpacityAnimationsEnabled()
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{
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static bool sAreOpacityAnimationsEnabled;
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static bool sOpacityPrefCached = false;
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if (!sOpacityPrefCached) {
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sOpacityPrefCached = true;
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Preferences::AddBoolVarCache(&sAreOpacityAnimationsEnabled,
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"layers.offmainthreadcomposition.animate-opacity");
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}
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return sAreOpacityAnimationsEnabled &&
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gfxPlatform::OffMainThreadCompositingEnabled();
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}
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bool
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nsLayoutUtils::AreTransformAnimationsEnabled()
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{
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static bool sAreTransformAnimationsEnabled;
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static bool sTransformPrefCached = false;
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if (!sTransformPrefCached) {
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sTransformPrefCached = true;
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Preferences::AddBoolVarCache(&sAreTransformAnimationsEnabled,
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"layers.offmainthreadcomposition.animate-transform");
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}
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return sAreTransformAnimationsEnabled &&
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gfxPlatform::OffMainThreadCompositingEnabled();
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}
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bool
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nsLayoutUtils::IsAnimationLoggingEnabled()
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{
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static bool sShouldLog;
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static bool sShouldLogPrefCached;
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if (!sShouldLogPrefCached) {
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sShouldLogPrefCached = true;
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Preferences::AddBoolVarCache(&sShouldLog,
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"layers.offmainthreadcomposition.log-animations");
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}
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return sShouldLog;
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}
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bool
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nsLayoutUtils::UseBackgroundNearestFiltering()
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{
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static bool sUseBackgroundNearestFilteringEnabled;
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static bool sUseBackgroundNearestFilteringPrefInitialised = false;
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if (!sUseBackgroundNearestFilteringPrefInitialised) {
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sUseBackgroundNearestFilteringPrefInitialised = true;
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sUseBackgroundNearestFilteringEnabled = mozilla::Preferences::GetBool("gfx.filter.nearest.force-enabled", false);
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}
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return sUseBackgroundNearestFilteringEnabled;
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}
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bool
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nsLayoutUtils::GPUImageScalingEnabled()
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{
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static bool sGPUImageScalingEnabled;
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static bool sGPUImageScalingPrefInitialised = false;
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if (!sGPUImageScalingPrefInitialised) {
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sGPUImageScalingPrefInitialised = true;
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sGPUImageScalingEnabled = mozilla::Preferences::GetBool("layout.gpu-image-scaling.enabled", false);
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}
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return sGPUImageScalingEnabled;
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}
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void
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nsLayoutUtils::UnionChildOverflow(nsIFrame* aFrame,
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nsOverflowAreas& aOverflowAreas)
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{
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// Iterate over all children except pop-ups.
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const nsIFrame::ChildListIDs skip(nsIFrame::kPopupList |
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nsIFrame::kSelectPopupList);
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for (nsIFrame::ChildListIterator childLists(aFrame);
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!childLists.IsDone(); childLists.Next()) {
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if (skip.Contains(childLists.CurrentID())) {
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continue;
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}
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nsFrameList children = childLists.CurrentList();
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for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
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nsIFrame* child = e.get();
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nsOverflowAreas childOverflow =
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child->GetOverflowAreas() + child->GetPosition();
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aOverflowAreas.UnionWith(childOverflow);
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}
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}
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}
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static void DestroyViewID(void* aObject, nsIAtom* aPropertyName,
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void* aPropertyValue, void* aData)
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{
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ViewID* id = static_cast<ViewID*>(aPropertyValue);
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GetContentMap().Remove(*id);
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delete id;
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}
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/**
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* A namespace class for static layout utilities.
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*/
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ViewID
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nsLayoutUtils::FindIDFor(nsIContent* aContent)
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{
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ViewID scrollId;
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void* scrollIdProperty = aContent->GetProperty(nsGkAtoms::RemoteId);
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if (scrollIdProperty) {
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scrollId = *static_cast<ViewID*>(scrollIdProperty);
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} else {
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scrollId = sScrollIdCounter++;
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aContent->SetProperty(nsGkAtoms::RemoteId, new ViewID(scrollId),
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DestroyViewID);
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GetContentMap().Put(scrollId, aContent);
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}
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return scrollId;
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}
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nsIContent*
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nsLayoutUtils::FindContentFor(ViewID aId)
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{
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NS_ABORT_IF_FALSE(aId != FrameMetrics::NULL_SCROLL_ID &&
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aId != FrameMetrics::ROOT_SCROLL_ID,
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"Cannot find a content element in map for null or root IDs.");
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nsIContent* content;
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bool exists = GetContentMap().Get(aId, &content);
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if (exists) {
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return content;
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} else {
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return nullptr;
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}
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}
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bool
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nsLayoutUtils::GetDisplayPort(nsIContent* aContent, nsRect *aResult)
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{
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void* property = aContent->GetProperty(nsGkAtoms::DisplayPort);
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if (!property) {
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return false;
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}
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if (aResult) {
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*aResult = *static_cast<nsRect*>(property);
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}
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return true;
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}
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nsIFrame*
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nsLayoutUtils::GetLastContinuationWithChild(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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aFrame = aFrame->GetLastContinuation();
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while (!aFrame->GetFirstPrincipalChild() &&
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aFrame->GetPrevContinuation()) {
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aFrame = aFrame->GetPrevContinuation();
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}
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return aFrame;
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}
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/**
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* GetFirstChildFrame returns the first "real" child frame of a
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* given frame. It will descend down into pseudo-frames (unless the
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* pseudo-frame is the :before generated frame).
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* @param aFrame the frame
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* @param aFrame the frame's content node
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*/
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static nsIFrame*
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GetFirstChildFrame(nsIFrame* aFrame,
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nsIContent* aContent)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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// Get the first child frame
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nsIFrame* childFrame = aFrame->GetFirstPrincipalChild();
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// If the child frame is a pseudo-frame, then return its first child.
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// Note that the frame we create for the generated content is also a
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// pseudo-frame and so don't drill down in that case
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if (childFrame &&
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childFrame->IsPseudoFrame(aContent) &&
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!childFrame->IsGeneratedContentFrame()) {
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return GetFirstChildFrame(childFrame, aContent);
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}
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return childFrame;
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}
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/**
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* GetLastChildFrame returns the last "real" child frame of a
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* given frame. It will descend down into pseudo-frames (unless the
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* pseudo-frame is the :after generated frame).
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* @param aFrame the frame
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* @param aFrame the frame's content node
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*/
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static nsIFrame*
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GetLastChildFrame(nsIFrame* aFrame,
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nsIContent* aContent)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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// Get the last continuation frame that's a parent
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nsIFrame* lastParentContinuation =
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nsLayoutUtils::GetLastContinuationWithChild(aFrame);
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nsIFrame* lastChildFrame =
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lastParentContinuation->GetLastChild(nsIFrame::kPrincipalList);
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if (lastChildFrame) {
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// Get the frame's first continuation. This matters in case the frame has
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// been continued across multiple lines or split by BiDi resolution.
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lastChildFrame = lastChildFrame->GetFirstContinuation();
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// If the last child frame is a pseudo-frame, then return its last child.
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// Note that the frame we create for the generated content is also a
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// pseudo-frame and so don't drill down in that case
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if (lastChildFrame &&
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lastChildFrame->IsPseudoFrame(aContent) &&
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!lastChildFrame->IsGeneratedContentFrame()) {
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return GetLastChildFrame(lastChildFrame, aContent);
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}
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return lastChildFrame;
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}
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return nullptr;
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}
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//static
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nsIFrame::ChildListID
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nsLayoutUtils::GetChildListNameFor(nsIFrame* aChildFrame)
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{
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nsIFrame::ChildListID id = nsIFrame::kPrincipalList;
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if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
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nsIFrame* pif = aChildFrame->GetPrevInFlow();
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if (pif->GetParent() == aChildFrame->GetParent()) {
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id = nsIFrame::kExcessOverflowContainersList;
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}
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else {
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id = nsIFrame::kOverflowContainersList;
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}
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}
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// See if the frame is moved out of the flow
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else if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
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// Look at the style information to tell
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const nsStyleDisplay* disp = aChildFrame->GetStyleDisplay();
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if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) {
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id = nsIFrame::kAbsoluteList;
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} else if (NS_STYLE_POSITION_FIXED == disp->mPosition) {
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if (nsLayoutUtils::IsReallyFixedPos(aChildFrame)) {
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id = nsIFrame::kFixedList;
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} else {
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id = nsIFrame::kAbsoluteList;
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}
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#ifdef MOZ_XUL
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} else if (NS_STYLE_DISPLAY_POPUP == disp->mDisplay) {
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// Out-of-flows that are DISPLAY_POPUP must be kids of the root popup set
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#ifdef DEBUG
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nsIFrame* parent = aChildFrame->GetParent();
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NS_ASSERTION(parent && parent->GetType() == nsGkAtoms::popupSetFrame,
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"Unexpected parent");
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#endif // DEBUG
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|
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// XXX FIXME: Bug 350740
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// Return here, because the postcondition for this function actually
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// fails for this case, since the popups are not in a "real" frame list
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// in the popup set.
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return nsIFrame::kPopupList;
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#endif // MOZ_XUL
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} else {
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NS_ASSERTION(aChildFrame->IsFloating(),
|
|
"not a floated frame");
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id = nsIFrame::kFloatList;
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}
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} else {
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nsIAtom* childType = aChildFrame->GetType();
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if (nsGkAtoms::menuPopupFrame == childType) {
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nsIFrame* parent = aChildFrame->GetParent();
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nsIFrame* firstPopup = (parent)
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? parent->GetFirstChild(nsIFrame::kPopupList)
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: nullptr;
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NS_ASSERTION(!firstPopup || !firstPopup->GetNextSibling(),
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"We assume popupList only has one child, but it has more.");
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id = firstPopup == aChildFrame
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? nsIFrame::kPopupList
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: nsIFrame::kPrincipalList;
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} else if (nsGkAtoms::tableColGroupFrame == childType) {
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id = nsIFrame::kColGroupList;
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|
} else if (nsGkAtoms::tableCaptionFrame == aChildFrame->GetType()) {
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id = nsIFrame::kCaptionList;
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|
} else {
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id = nsIFrame::kPrincipalList;
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}
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|
}
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|
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#ifdef DEBUG
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|
// Verify that the frame is actually in that child list or in the
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|
// corresponding overflow list.
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|
nsIFrame* parent = aChildFrame->GetParent();
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bool found = parent->GetChildList(id).ContainsFrame(aChildFrame);
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|
if (!found) {
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|
if (!(aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
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|
found = parent->GetChildList(nsIFrame::kOverflowList)
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.ContainsFrame(aChildFrame);
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}
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else if (aChildFrame->IsFloating()) {
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found = parent->GetChildList(nsIFrame::kOverflowOutOfFlowList)
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.ContainsFrame(aChildFrame);
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}
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// else it's positioned and should have been on the 'id' child list.
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NS_POSTCONDITION(found, "not in child list");
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}
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#endif
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return id;
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}
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// static
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nsIFrame*
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nsLayoutUtils::GetBeforeFrame(nsIFrame* aFrame)
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|
{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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NS_ASSERTION(!aFrame->GetPrevContinuation(),
|
|
"aFrame must be first continuation");
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nsIFrame* firstFrame = GetFirstChildFrame(aFrame, aFrame->GetContent());
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|
|
if (firstFrame && IsGeneratedContentFor(nullptr, firstFrame,
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nsCSSPseudoElements::before)) {
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return firstFrame;
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}
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return nullptr;
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}
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// static
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nsIFrame*
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nsLayoutUtils::GetAfterFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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|
|
nsIFrame* lastFrame = GetLastChildFrame(aFrame, aFrame->GetContent());
|
|
|
|
if (lastFrame && IsGeneratedContentFor(nullptr, lastFrame,
|
|
nsCSSPseudoElements::after)) {
|
|
return lastFrame;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// static
|
|
nsIFrame*
|
|
nsLayoutUtils::GetClosestFrameOfType(nsIFrame* aFrame, nsIAtom* aFrameType)
|
|
{
|
|
for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
|
|
if (frame->GetType() == aFrameType) {
|
|
return frame;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// static
|
|
nsIFrame*
|
|
nsLayoutUtils::GetStyleFrame(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->GetType() == nsGkAtoms::tableOuterFrame) {
|
|
nsIFrame* inner = aFrame->GetFirstPrincipalChild();
|
|
NS_ASSERTION(inner, "Outer table must have an inner");
|
|
return inner;
|
|
}
|
|
|
|
return aFrame;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFloatFromPlaceholder(nsIFrame* aFrame) {
|
|
NS_ASSERTION(nsGkAtoms::placeholderFrame == aFrame->GetType(),
|
|
"Must have a placeholder here");
|
|
if (aFrame->GetStateBits() & PLACEHOLDER_FOR_FLOAT) {
|
|
nsIFrame *outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
NS_ASSERTION(outOfFlowFrame->IsFloating(),
|
|
"How did that happen?");
|
|
return outOfFlowFrame;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// static
|
|
bool
|
|
nsLayoutUtils::IsGeneratedContentFor(nsIContent* aContent,
|
|
nsIFrame* aFrame,
|
|
nsIAtom* aPseudoElement)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Must have a frame");
|
|
NS_PRECONDITION(aPseudoElement, "Must have a pseudo name");
|
|
|
|
if (!aFrame->IsGeneratedContentFrame()) {
|
|
return false;
|
|
}
|
|
nsIFrame* parent = aFrame->GetParent();
|
|
NS_ASSERTION(parent, "Generated content can't be root frame");
|
|
if (parent->IsGeneratedContentFrame()) {
|
|
// Not the root of the generated content
|
|
return false;
|
|
}
|
|
|
|
if (aContent && parent->GetContent() != aContent) {
|
|
return false;
|
|
}
|
|
|
|
return (aFrame->GetContent()->Tag() == nsGkAtoms::mozgeneratedcontentbefore) ==
|
|
(aPseudoElement == nsCSSPseudoElements::before);
|
|
}
|
|
|
|
// static
|
|
nsIFrame*
|
|
nsLayoutUtils::GetCrossDocParentFrame(const nsIFrame* aFrame,
|
|
nsPoint* aExtraOffset)
|
|
{
|
|
nsIFrame* p = aFrame->GetParent();
|
|
if (p)
|
|
return p;
|
|
|
|
nsIView* v = aFrame->GetView();
|
|
if (!v)
|
|
return nullptr;
|
|
v = v->GetParent(); // anonymous inner view
|
|
if (!v)
|
|
return nullptr;
|
|
if (aExtraOffset) {
|
|
*aExtraOffset += v->GetPosition();
|
|
}
|
|
v = v->GetParent(); // subdocumentframe's view
|
|
return v ? v->GetFrame() : nullptr;
|
|
}
|
|
|
|
// static
|
|
bool
|
|
nsLayoutUtils::IsProperAncestorFrameCrossDoc(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
if (aFrame == aAncestorFrame)
|
|
return false;
|
|
return IsAncestorFrameCrossDoc(aAncestorFrame, aFrame, aCommonAncestor);
|
|
}
|
|
|
|
// static
|
|
bool
|
|
nsLayoutUtils::IsAncestorFrameCrossDoc(const nsIFrame* aAncestorFrame, const nsIFrame* aFrame,
|
|
const nsIFrame* aCommonAncestor)
|
|
{
|
|
for (const nsIFrame* f = aFrame; f != aCommonAncestor;
|
|
f = GetCrossDocParentFrame(f)) {
|
|
if (f == aAncestorFrame)
|
|
return true;
|
|
}
|
|
return aCommonAncestor == aAncestorFrame;
|
|
}
|
|
|
|
// static
|
|
bool
|
|
nsLayoutUtils::IsProperAncestorFrame(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
if (aFrame == aAncestorFrame)
|
|
return false;
|
|
for (nsIFrame* f = aFrame; f != aCommonAncestor; f = f->GetParent()) {
|
|
if (f == aAncestorFrame)
|
|
return true;
|
|
}
|
|
return aCommonAncestor == aAncestorFrame;
|
|
}
|
|
|
|
// static
|
|
int32_t
|
|
nsLayoutUtils::DoCompareTreePosition(nsIContent* aContent1,
|
|
nsIContent* aContent2,
|
|
int32_t aIf1Ancestor,
|
|
int32_t aIf2Ancestor,
|
|
const nsIContent* aCommonAncestor)
|
|
{
|
|
NS_PRECONDITION(aContent1, "aContent1 must not be null");
|
|
NS_PRECONDITION(aContent2, "aContent2 must not be null");
|
|
|
|
nsAutoTArray<nsINode*, 32> content1Ancestors;
|
|
nsINode* c1;
|
|
for (c1 = aContent1; c1 && c1 != aCommonAncestor; c1 = c1->GetNodeParent()) {
|
|
content1Ancestors.AppendElement(c1);
|
|
}
|
|
if (!c1 && aCommonAncestor) {
|
|
// So, it turns out aCommonAncestor was not an ancestor of c1. Oops.
|
|
// Never mind. We can continue as if aCommonAncestor was null.
|
|
aCommonAncestor = nullptr;
|
|
}
|
|
|
|
nsAutoTArray<nsINode*, 32> content2Ancestors;
|
|
nsINode* c2;
|
|
for (c2 = aContent2; c2 && c2 != aCommonAncestor; c2 = c2->GetNodeParent()) {
|
|
content2Ancestors.AppendElement(c2);
|
|
}
|
|
if (!c2 && aCommonAncestor) {
|
|
// So, it turns out aCommonAncestor was not an ancestor of c2.
|
|
// We need to retry with no common ancestor hint.
|
|
return DoCompareTreePosition(aContent1, aContent2,
|
|
aIf1Ancestor, aIf2Ancestor, nullptr);
|
|
}
|
|
|
|
int last1 = content1Ancestors.Length() - 1;
|
|
int last2 = content2Ancestors.Length() - 1;
|
|
nsINode* content1Ancestor = nullptr;
|
|
nsINode* content2Ancestor = nullptr;
|
|
while (last1 >= 0 && last2 >= 0
|
|
&& ((content1Ancestor = content1Ancestors.ElementAt(last1)) ==
|
|
(content2Ancestor = content2Ancestors.ElementAt(last2)))) {
|
|
last1--;
|
|
last2--;
|
|
}
|
|
|
|
if (last1 < 0) {
|
|
if (last2 < 0) {
|
|
NS_ASSERTION(aContent1 == aContent2, "internal error?");
|
|
return 0;
|
|
}
|
|
// aContent1 is an ancestor of aContent2
|
|
return aIf1Ancestor;
|
|
}
|
|
|
|
if (last2 < 0) {
|
|
// aContent2 is an ancestor of aContent1
|
|
return aIf2Ancestor;
|
|
}
|
|
|
|
// content1Ancestor != content2Ancestor, so they must be siblings with the same parent
|
|
nsINode* parent = content1Ancestor->GetNodeParent();
|
|
#ifdef DEBUG
|
|
// TODO: remove the uglyness, see bug 598468.
|
|
NS_ASSERTION(gPreventAssertInCompareTreePosition || parent,
|
|
"no common ancestor at all???");
|
|
#endif // DEBUG
|
|
if (!parent) { // different documents??
|
|
return 0;
|
|
}
|
|
|
|
int32_t index1 = parent->IndexOf(content1Ancestor);
|
|
int32_t index2 = parent->IndexOf(content2Ancestor);
|
|
if (index1 < 0 || index2 < 0) {
|
|
// one of them must be anonymous; we can't determine the order
|
|
return 0;
|
|
}
|
|
|
|
return index1 - index2;
|
|
}
|
|
|
|
static nsIFrame* FillAncestors(nsIFrame* aFrame,
|
|
nsIFrame* aStopAtAncestor,
|
|
nsTArray<nsIFrame*>* aAncestors)
|
|
{
|
|
while (aFrame && aFrame != aStopAtAncestor) {
|
|
aAncestors->AppendElement(aFrame);
|
|
aFrame = nsLayoutUtils::GetParentOrPlaceholderFor(aFrame);
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
// Return true if aFrame1 is after aFrame2
|
|
static bool IsFrameAfter(nsIFrame* aFrame1, nsIFrame* aFrame2)
|
|
{
|
|
nsIFrame* f = aFrame2;
|
|
do {
|
|
f = f->GetNextSibling();
|
|
if (f == aFrame1)
|
|
return true;
|
|
} while (f);
|
|
return false;
|
|
}
|
|
|
|
// static
|
|
int32_t
|
|
nsLayoutUtils::DoCompareTreePosition(nsIFrame* aFrame1,
|
|
nsIFrame* aFrame2,
|
|
int32_t aIf1Ancestor,
|
|
int32_t aIf2Ancestor,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
NS_PRECONDITION(aFrame1, "aFrame1 must not be null");
|
|
NS_PRECONDITION(aFrame2, "aFrame2 must not be null");
|
|
|
|
nsPresContext* presContext = aFrame1->PresContext();
|
|
if (presContext != aFrame2->PresContext()) {
|
|
NS_ERROR("no common ancestor at all, different documents");
|
|
return 0;
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame*,20> frame1Ancestors;
|
|
if (!FillAncestors(aFrame1, aCommonAncestor, &frame1Ancestors)) {
|
|
// We reached the root of the frame tree ... if aCommonAncestor was set,
|
|
// it is wrong
|
|
aCommonAncestor = nullptr;
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame*,20> frame2Ancestors;
|
|
if (!FillAncestors(aFrame2, aCommonAncestor, &frame2Ancestors) &&
|
|
aCommonAncestor) {
|
|
// We reached the root of the frame tree ... aCommonAncestor was wrong.
|
|
// Try again with no hint.
|
|
return DoCompareTreePosition(aFrame1, aFrame2,
|
|
aIf1Ancestor, aIf2Ancestor, nullptr);
|
|
}
|
|
|
|
int32_t last1 = int32_t(frame1Ancestors.Length()) - 1;
|
|
int32_t last2 = int32_t(frame2Ancestors.Length()) - 1;
|
|
while (last1 >= 0 && last2 >= 0 &&
|
|
frame1Ancestors[last1] == frame2Ancestors[last2]) {
|
|
last1--;
|
|
last2--;
|
|
}
|
|
|
|
if (last1 < 0) {
|
|
if (last2 < 0) {
|
|
NS_ASSERTION(aFrame1 == aFrame2, "internal error?");
|
|
return 0;
|
|
}
|
|
// aFrame1 is an ancestor of aFrame2
|
|
return aIf1Ancestor;
|
|
}
|
|
|
|
if (last2 < 0) {
|
|
// aFrame2 is an ancestor of aFrame1
|
|
return aIf2Ancestor;
|
|
}
|
|
|
|
nsIFrame* ancestor1 = frame1Ancestors[last1];
|
|
nsIFrame* ancestor2 = frame2Ancestors[last2];
|
|
// Now we should be able to walk sibling chains to find which one is first
|
|
if (IsFrameAfter(ancestor2, ancestor1))
|
|
return -1;
|
|
if (IsFrameAfter(ancestor1, ancestor2))
|
|
return 1;
|
|
NS_WARNING("Frames were in different child lists???");
|
|
return 0;
|
|
}
|
|
|
|
// static
|
|
nsIFrame* nsLayoutUtils::GetLastSibling(nsIFrame* aFrame) {
|
|
if (!aFrame) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame* next;
|
|
while ((next = aFrame->GetNextSibling()) != nullptr) {
|
|
aFrame = next;
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
// static
|
|
nsIView*
|
|
nsLayoutUtils::FindSiblingViewFor(nsIView* aParentView, nsIFrame* aFrame) {
|
|
nsIFrame* parentViewFrame = aParentView->GetFrame();
|
|
nsIContent* parentViewContent = parentViewFrame ? parentViewFrame->GetContent() : nullptr;
|
|
for (nsIView* insertBefore = aParentView->GetFirstChild(); insertBefore;
|
|
insertBefore = insertBefore->GetNextSibling()) {
|
|
nsIFrame* f = insertBefore->GetFrame();
|
|
if (!f) {
|
|
// this view could be some anonymous view attached to a meaningful parent
|
|
for (nsIView* searchView = insertBefore->GetParent(); searchView;
|
|
searchView = searchView->GetParent()) {
|
|
f = searchView->GetFrame();
|
|
if (f) {
|
|
break;
|
|
}
|
|
}
|
|
NS_ASSERTION(f, "Can't find a frame anywhere!");
|
|
}
|
|
if (!f || !aFrame->GetContent() || !f->GetContent() ||
|
|
CompareTreePosition(aFrame->GetContent(), f->GetContent(), parentViewContent) > 0) {
|
|
// aFrame's content is after f's content (or we just don't know),
|
|
// so put our view before f's view
|
|
return insertBefore;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
//static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetScrollableFrameFor(const nsIFrame *aScrolledFrame)
|
|
{
|
|
nsIFrame *frame = aScrolledFrame->GetParent();
|
|
if (!frame) {
|
|
return nullptr;
|
|
}
|
|
nsIScrollableFrame *sf = do_QueryFrame(frame);
|
|
return sf;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetActiveScrolledRootFor(nsIFrame* aFrame,
|
|
const nsIFrame* aStopAtAncestor)
|
|
{
|
|
nsIFrame* f = aFrame;
|
|
while (f != aStopAtAncestor) {
|
|
if (IsPopup(f))
|
|
break;
|
|
nsIFrame* parent = GetCrossDocParentFrame(f);
|
|
if (!parent)
|
|
break;
|
|
nsIScrollableFrame* sf = do_QueryFrame(parent);
|
|
if (sf && sf->IsScrollingActive() && sf->GetScrolledFrame() == f)
|
|
break;
|
|
f = parent;
|
|
}
|
|
return f;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetActiveScrolledRootFor(nsDisplayItem* aItem,
|
|
nsDisplayListBuilder* aBuilder,
|
|
bool* aShouldFixToViewport)
|
|
{
|
|
nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
if (aShouldFixToViewport) {
|
|
*aShouldFixToViewport = false;
|
|
}
|
|
if (!f) {
|
|
return nullptr;
|
|
}
|
|
if (aItem->ShouldFixToViewport(aBuilder)) {
|
|
if (aShouldFixToViewport) {
|
|
*aShouldFixToViewport = true;
|
|
}
|
|
// Make its active scrolled root be the active scrolled root of
|
|
// the enclosing viewport, since it shouldn't be scrolled by scrolled
|
|
// frames in its document. InvalidateFixedBackgroundFramesFromList in
|
|
// nsGfxScrollFrame will not repaint this item when scrolling occurs.
|
|
nsIFrame* viewportFrame =
|
|
nsLayoutUtils::GetClosestFrameOfType(f, nsGkAtoms::viewportFrame);
|
|
NS_ASSERTION(viewportFrame, "no viewport???");
|
|
return nsLayoutUtils::GetActiveScrolledRootFor(viewportFrame, aBuilder->FindReferenceFrameFor(viewportFrame));
|
|
} else {
|
|
return nsLayoutUtils::GetActiveScrolledRootFor(f, aItem->ReferenceFrame());
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsLayoutUtils::IsScrolledByRootContentDocumentDisplayportScrolling(const nsIFrame* aActiveScrolledRoot,
|
|
nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsPresContext* presContext = aActiveScrolledRoot->PresContext()->
|
|
GetToplevelContentDocumentPresContext();
|
|
if (!presContext)
|
|
return false;
|
|
|
|
nsIFrame* rootScrollFrame = presContext->GetPresShell()->GetRootScrollFrame();
|
|
if (!rootScrollFrame || !nsLayoutUtils::GetDisplayPort(rootScrollFrame->GetContent(), nullptr))
|
|
return false;
|
|
return nsLayoutUtils::IsAncestorFrameCrossDoc(rootScrollFrame, aActiveScrolledRoot);
|
|
}
|
|
|
|
// static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetNearestScrollableFrameForDirection(nsIFrame* aFrame,
|
|
Direction aDirection)
|
|
{
|
|
NS_ASSERTION(aFrame, "GetNearestScrollableFrameForDirection expects a non-null frame");
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
|
if (scrollableFrame) {
|
|
nsPresContext::ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
|
uint32_t scrollbarVisibility = scrollableFrame->GetScrollbarVisibility();
|
|
nsRect scrollRange = scrollableFrame->GetScrollRange();
|
|
// Require visible scrollbars or something to scroll to in
|
|
// the given direction.
|
|
nscoord oneDevPixel = f->PresContext()->DevPixelsToAppUnits(1);
|
|
if (aDirection == eVertical ?
|
|
(ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN &&
|
|
((scrollbarVisibility & nsIScrollableFrame::VERTICAL) ||
|
|
scrollRange.height >= oneDevPixel)) :
|
|
(ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN &&
|
|
((scrollbarVisibility & nsIScrollableFrame::HORIZONTAL) ||
|
|
scrollRange.width >= oneDevPixel)))
|
|
return scrollableFrame;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetNearestScrollableFrame(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(aFrame, "GetNearestScrollableFrame expects a non-null frame");
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
|
if (scrollableFrame) {
|
|
nsPresContext::ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
|
if (ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN ||
|
|
ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN)
|
|
return scrollableFrame;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
//static
|
|
bool
|
|
nsLayoutUtils::HasPseudoStyle(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext,
|
|
nsCSSPseudoElements::Type aPseudoElement,
|
|
nsPresContext* aPresContext)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "Must have a prescontext");
|
|
|
|
nsRefPtr<nsStyleContext> pseudoContext;
|
|
if (aContent) {
|
|
pseudoContext = aPresContext->StyleSet()->
|
|
ProbePseudoElementStyle(aContent->AsElement(), aPseudoElement,
|
|
aStyleContext);
|
|
}
|
|
return pseudoContext != nullptr;
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(nsIDOMEvent* aDOMEvent, nsIFrame* aFrame)
|
|
{
|
|
if (!aDOMEvent)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
nsEvent *event = aDOMEvent->GetInternalNSEvent();
|
|
if (!event)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
return GetEventCoordinatesRelativeTo(event, aFrame);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(const nsEvent* aEvent, nsIFrame* aFrame)
|
|
{
|
|
if (!aEvent || (aEvent->eventStructType != NS_MOUSE_EVENT &&
|
|
aEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
|
|
aEvent->eventStructType != NS_WHEEL_EVENT &&
|
|
aEvent->eventStructType != NS_DRAG_EVENT &&
|
|
aEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT &&
|
|
aEvent->eventStructType != NS_GESTURENOTIFY_EVENT &&
|
|
aEvent->eventStructType != NS_MOZTOUCH_EVENT &&
|
|
aEvent->eventStructType != NS_TOUCH_EVENT &&
|
|
aEvent->eventStructType != NS_QUERY_CONTENT_EVENT))
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
|
|
const nsGUIEvent* GUIEvent = static_cast<const nsGUIEvent*>(aEvent);
|
|
return GetEventCoordinatesRelativeTo(aEvent,
|
|
GUIEvent->refPoint,
|
|
aFrame);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(const nsEvent* aEvent,
|
|
const nsIntPoint aPoint,
|
|
nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
const nsGUIEvent* GUIEvent = static_cast<const nsGUIEvent*>(aEvent);
|
|
nsIWidget* widget = GUIEvent->widget;
|
|
if (!widget) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
return GetEventCoordinatesRelativeTo(widget, aPoint, aFrame);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(nsIWidget* aWidget,
|
|
const nsIntPoint aPoint,
|
|
nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame || !aWidget) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
nsIView* view = aFrame->GetView();
|
|
if (view) {
|
|
nsIWidget* frameWidget = view->GetWidget();
|
|
if (frameWidget && frameWidget == aWidget) {
|
|
// Special case this cause it happens a lot.
|
|
// This also fixes bug 664707, events in the extra-special case of select
|
|
// dropdown popups that are transformed.
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
nsPoint pt(presContext->DevPixelsToAppUnits(aPoint.x),
|
|
presContext->DevPixelsToAppUnits(aPoint.y));
|
|
return pt - view->ViewToWidgetOffset();
|
|
}
|
|
}
|
|
|
|
/* If we walk up the frame tree and discover that any of the frames are
|
|
* transformed, we need to do extra work to convert from the global
|
|
* space to the local space.
|
|
*/
|
|
nsIFrame* rootFrame = aFrame;
|
|
bool transformFound = false;
|
|
for (nsIFrame* f = aFrame; f; f = GetCrossDocParentFrame(f)) {
|
|
if (f->IsTransformed()) {
|
|
transformFound = true;
|
|
}
|
|
|
|
rootFrame = f;
|
|
}
|
|
|
|
nsIView* rootView = rootFrame->GetView();
|
|
if (!rootView) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
nsPoint widgetToView = TranslateWidgetToView(rootFrame->PresContext(),
|
|
aWidget, aPoint, rootView);
|
|
|
|
if (widgetToView == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
// Convert from root document app units to app units of the document aFrame
|
|
// is in.
|
|
int32_t rootAPD = rootFrame->PresContext()->AppUnitsPerDevPixel();
|
|
int32_t localAPD = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
widgetToView = widgetToView.ConvertAppUnits(rootAPD, localAPD);
|
|
|
|
/* If we encountered a transform, we can't do simple arithmetic to figure
|
|
* out how to convert back to aFrame's coordinates and must use the CTM.
|
|
*/
|
|
if (transformFound) {
|
|
return TransformRootPointToFrame(aFrame, widgetToView);
|
|
}
|
|
|
|
/* Otherwise, all coordinate systems are translations of one another,
|
|
* so we can just subtract out the different.
|
|
*/
|
|
nsPoint offset = aFrame->GetOffsetToCrossDoc(rootFrame);
|
|
return widgetToView - offset;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetPopupFrameForEventCoordinates(nsPresContext* aPresContext,
|
|
const nsEvent* aEvent)
|
|
{
|
|
#ifdef MOZ_XUL
|
|
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
|
|
if (!pm) {
|
|
return nullptr;
|
|
}
|
|
nsTArray<nsIFrame*> popups = pm->GetVisiblePopups();
|
|
uint32_t i;
|
|
// Search from top to bottom
|
|
for (i = 0; i < popups.Length(); i++) {
|
|
nsIFrame* popup = popups[i];
|
|
if (popup->PresContext()->GetRootPresContext() == aPresContext &&
|
|
popup->GetScrollableOverflowRect().Contains(
|
|
GetEventCoordinatesRelativeTo(aEvent, popup))) {
|
|
return popup;
|
|
}
|
|
}
|
|
#endif
|
|
return nullptr;
|
|
}
|
|
|
|
gfx3DMatrix
|
|
nsLayoutUtils::ChangeMatrixBasis(const gfxPoint3D &aOrigin,
|
|
const gfx3DMatrix &aMatrix)
|
|
{
|
|
gfx3DMatrix result = aMatrix;
|
|
|
|
/* Translate to the origin before aMatrix */
|
|
result.Translate(-aOrigin);
|
|
|
|
/* Translate back into position after aMatrix */
|
|
result.TranslatePost(aOrigin);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Given a gfxFloat, constrains its value to be between nscoord_MIN and nscoord_MAX.
|
|
*
|
|
* @param aVal The value to constrain (in/out)
|
|
*/
|
|
static void ConstrainToCoordValues(gfxFloat &aVal)
|
|
{
|
|
if (aVal <= nscoord_MIN)
|
|
aVal = nscoord_MIN;
|
|
else if (aVal >= nscoord_MAX)
|
|
aVal = nscoord_MAX;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::RoundGfxRectToAppRect(const gfxRect &aRect, float aFactor)
|
|
{
|
|
/* Get a new gfxRect whose units are app units by scaling by the specified factor. */
|
|
gfxRect scaledRect = aRect;
|
|
scaledRect.ScaleRoundOut(aFactor);
|
|
|
|
/* We now need to constrain our results to the max and min values for coords. */
|
|
ConstrainToCoordValues(scaledRect.x);
|
|
ConstrainToCoordValues(scaledRect.y);
|
|
ConstrainToCoordValues(scaledRect.width);
|
|
ConstrainToCoordValues(scaledRect.height);
|
|
|
|
/* Now typecast everything back. This is guaranteed to be safe. */
|
|
return nsRect(nscoord(scaledRect.X()), nscoord(scaledRect.Y()),
|
|
nscoord(scaledRect.Width()), nscoord(scaledRect.Height()));
|
|
}
|
|
|
|
|
|
nsRegion
|
|
nsLayoutUtils::RoundedRectIntersectRect(const nsRect& aRoundedRect,
|
|
const nscoord aRadii[8],
|
|
const nsRect& aContainedRect)
|
|
{
|
|
// rectFullHeight and rectFullWidth together will approximately contain
|
|
// the total area of the frame minus the rounded corners.
|
|
nsRect rectFullHeight = aRoundedRect;
|
|
nscoord xDiff = NS_MAX(aRadii[NS_CORNER_TOP_LEFT_X], aRadii[NS_CORNER_BOTTOM_LEFT_X]);
|
|
rectFullHeight.x += xDiff;
|
|
rectFullHeight.width -= NS_MAX(aRadii[NS_CORNER_TOP_RIGHT_X],
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_X]) + xDiff;
|
|
nsRect r1;
|
|
r1.IntersectRect(rectFullHeight, aContainedRect);
|
|
|
|
nsRect rectFullWidth = aRoundedRect;
|
|
nscoord yDiff = NS_MAX(aRadii[NS_CORNER_TOP_LEFT_Y], aRadii[NS_CORNER_TOP_RIGHT_Y]);
|
|
rectFullWidth.y += yDiff;
|
|
rectFullWidth.height -= NS_MAX(aRadii[NS_CORNER_BOTTOM_LEFT_Y],
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_Y]) + yDiff;
|
|
nsRect r2;
|
|
r2.IntersectRect(rectFullWidth, aContainedRect);
|
|
|
|
nsRegion result;
|
|
result.Or(r1, r2);
|
|
return result;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::MatrixTransformRectOut(const nsRect &aBounds,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
nsRect outside = aBounds;
|
|
outside.ScaleRoundOut(1/aFactor);
|
|
gfxRect image = aMatrix.TransformBounds(gfxRect(outside.x,
|
|
outside.y,
|
|
outside.width,
|
|
outside.height));
|
|
return RoundGfxRectToAppRect(image, aFactor);
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::MatrixTransformRect(const nsRect &aBounds,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
gfxRect image = aMatrix.TransformBounds(gfxRect(NSAppUnitsToDoublePixels(aBounds.x, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.y, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.width, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.height, aFactor)));
|
|
|
|
return RoundGfxRectToAppRect(image, aFactor);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::MatrixTransformPoint(const nsPoint &aPoint,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
gfxPoint image = aMatrix.Transform(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, aFactor),
|
|
NSAppUnitsToFloatPixels(aPoint.y, aFactor)));
|
|
return nsPoint(NSFloatPixelsToAppUnits(float(image.x), aFactor),
|
|
NSFloatPixelsToAppUnits(float(image.y), aFactor));
|
|
}
|
|
|
|
gfx3DMatrix
|
|
nsLayoutUtils::GetTransformToAncestor(nsIFrame *aFrame, const nsIFrame *aAncestor)
|
|
{
|
|
nsIFrame* parent;
|
|
gfx3DMatrix ctm = aFrame->GetTransformMatrix(aAncestor, &parent);
|
|
while (parent && parent != aAncestor) {
|
|
if (!parent->Preserves3DChildren()) {
|
|
ctm.ProjectTo2D();
|
|
}
|
|
ctm = ctm * parent->GetTransformMatrix(aAncestor, &parent);
|
|
}
|
|
return ctm;
|
|
}
|
|
|
|
static gfxPoint
|
|
TransformGfxPointFromAncestor(nsIFrame *aFrame,
|
|
const gfxPoint &aPoint,
|
|
nsIFrame *aAncestor)
|
|
{
|
|
gfx3DMatrix ctm = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestor);
|
|
return ctm.Inverse().ProjectPoint(aPoint);
|
|
}
|
|
|
|
static gfxRect
|
|
TransformGfxRectFromAncestor(nsIFrame *aFrame,
|
|
const gfxRect &aRect,
|
|
const nsIFrame *aAncestor)
|
|
{
|
|
gfx3DMatrix ctm = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestor);
|
|
return ctm.Inverse().ProjectRectBounds(aRect);
|
|
}
|
|
|
|
static gfxRect
|
|
TransformGfxRectToAncestor(nsIFrame *aFrame,
|
|
const gfxRect &aRect,
|
|
nsIFrame *aAncestor)
|
|
{
|
|
gfx3DMatrix ctm = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestor);
|
|
return ctm.TransformBounds(aRect);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::TransformRootPointToFrame(nsIFrame *aFrame,
|
|
const nsPoint &aPoint)
|
|
{
|
|
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxPoint result(NSAppUnitsToFloatPixels(aPoint.x, factor),
|
|
NSAppUnitsToFloatPixels(aPoint.y, factor));
|
|
|
|
result = TransformGfxPointFromAncestor(aFrame, result, nullptr);
|
|
|
|
return nsPoint(NSFloatPixelsToAppUnits(float(result.x), factor),
|
|
NSFloatPixelsToAppUnits(float(result.y), factor));
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::TransformAncestorRectToFrame(nsIFrame* aFrame,
|
|
const nsRect &aRect,
|
|
const nsIFrame* aAncestor)
|
|
{
|
|
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxRect result(NSAppUnitsToFloatPixels(aRect.x, factor),
|
|
NSAppUnitsToFloatPixels(aRect.y, factor),
|
|
NSAppUnitsToFloatPixels(aRect.width, factor),
|
|
NSAppUnitsToFloatPixels(aRect.height, factor));
|
|
|
|
result = TransformGfxRectFromAncestor(aFrame, result, aAncestor);
|
|
|
|
return nsRect(NSFloatPixelsToAppUnits(float(result.x), factor),
|
|
NSFloatPixelsToAppUnits(float(result.y), factor),
|
|
NSFloatPixelsToAppUnits(float(result.width), factor),
|
|
NSFloatPixelsToAppUnits(float(result.height), factor));
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::TransformFrameRectToAncestor(nsIFrame* aFrame,
|
|
const nsRect& aRect,
|
|
nsIFrame* aAncestor)
|
|
{
|
|
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxRect result(NSAppUnitsToFloatPixels(aRect.x, factor),
|
|
NSAppUnitsToFloatPixels(aRect.y, factor),
|
|
NSAppUnitsToFloatPixels(aRect.width, factor),
|
|
NSAppUnitsToFloatPixels(aRect.height, factor));
|
|
|
|
result = TransformGfxRectToAncestor(aFrame, result, aAncestor);
|
|
|
|
return nsRect(NSFloatPixelsToAppUnits(float(result.x), factor),
|
|
NSFloatPixelsToAppUnits(float(result.y), factor),
|
|
NSFloatPixelsToAppUnits(float(result.width), factor),
|
|
NSFloatPixelsToAppUnits(float(result.height), factor));
|
|
}
|
|
|
|
static nsIntPoint GetWidgetOffset(nsIWidget* aWidget, nsIWidget*& aRootWidget) {
|
|
nsIntPoint offset(0, 0);
|
|
nsIWidget* parent = aWidget->GetParent();
|
|
while (parent) {
|
|
nsIntRect bounds;
|
|
aWidget->GetBounds(bounds);
|
|
offset += bounds.TopLeft();
|
|
aWidget = parent;
|
|
parent = aWidget->GetParent();
|
|
}
|
|
aRootWidget = aWidget;
|
|
return offset;
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::TranslateWidgetToView(nsPresContext* aPresContext,
|
|
nsIWidget* aWidget, nsIntPoint aPt,
|
|
nsIView* aView)
|
|
{
|
|
nsPoint viewOffset;
|
|
nsIWidget* viewWidget = aView->GetNearestWidget(&viewOffset);
|
|
if (!viewWidget) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
nsIWidget* fromRoot;
|
|
nsIntPoint fromOffset = GetWidgetOffset(aWidget, fromRoot);
|
|
nsIWidget* toRoot;
|
|
nsIntPoint toOffset = GetWidgetOffset(viewWidget, toRoot);
|
|
|
|
nsIntPoint widgetPoint;
|
|
if (fromRoot == toRoot) {
|
|
widgetPoint = aPt + fromOffset - toOffset;
|
|
} else {
|
|
nsIntPoint screenPoint = aWidget->WidgetToScreenOffset();
|
|
widgetPoint = aPt + screenPoint - viewWidget->WidgetToScreenOffset();
|
|
}
|
|
|
|
nsPoint widgetAppUnits(aPresContext->DevPixelsToAppUnits(widgetPoint.x),
|
|
aPresContext->DevPixelsToAppUnits(widgetPoint.y));
|
|
return widgetAppUnits - viewOffset;
|
|
}
|
|
|
|
// Combine aNewBreakType with aOrigBreakType, but limit the break types
|
|
// to NS_STYLE_CLEAR_LEFT, RIGHT, LEFT_AND_RIGHT.
|
|
uint8_t
|
|
nsLayoutUtils::CombineBreakType(uint8_t aOrigBreakType,
|
|
uint8_t aNewBreakType)
|
|
{
|
|
uint8_t breakType = aOrigBreakType;
|
|
switch(breakType) {
|
|
case NS_STYLE_CLEAR_LEFT:
|
|
if ((NS_STYLE_CLEAR_RIGHT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = NS_STYLE_CLEAR_LEFT_AND_RIGHT;
|
|
}
|
|
break;
|
|
case NS_STYLE_CLEAR_RIGHT:
|
|
if ((NS_STYLE_CLEAR_LEFT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = NS_STYLE_CLEAR_LEFT_AND_RIGHT;
|
|
}
|
|
break;
|
|
case NS_STYLE_CLEAR_NONE:
|
|
if ((NS_STYLE_CLEAR_LEFT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_RIGHT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = aNewBreakType;
|
|
}
|
|
}
|
|
return breakType;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
#include <stdio.h>
|
|
|
|
static bool gDumpEventList = false;
|
|
int gPaintCount = 0;
|
|
#endif
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetRemoteContentIds(nsIFrame* aFrame,
|
|
const nsRect& aTarget,
|
|
nsTArray<ViewID> &aOutIDs,
|
|
bool aIgnoreRootScrollFrame)
|
|
{
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
|
|
false);
|
|
nsDisplayList list;
|
|
|
|
if (aIgnoreRootScrollFrame) {
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
}
|
|
}
|
|
|
|
builder.EnterPresShell(aFrame, aTarget);
|
|
|
|
nsresult rv =
|
|
aFrame->BuildDisplayListForStackingContext(&builder, aTarget, &list);
|
|
|
|
builder.LeavePresShell(aFrame, aTarget);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsAutoTArray<nsIFrame*,8> outFrames;
|
|
nsDisplayItem::HitTestState hitTestState(&aOutIDs);
|
|
list.HitTest(&builder, aTarget, &hitTestState, &outFrames);
|
|
list.DeleteAll();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt,
|
|
bool aShouldIgnoreSuppression,
|
|
bool aIgnoreRootScrollFrame)
|
|
{
|
|
SAMPLE_LABEL("nsLayoutUtils", "GetFrameForPoint");
|
|
nsresult rv;
|
|
nsAutoTArray<nsIFrame*,8> outFrames;
|
|
rv = GetFramesForArea(aFrame, nsRect(aPt, nsSize(1, 1)), outFrames,
|
|
aShouldIgnoreSuppression, aIgnoreRootScrollFrame);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
return outFrames.Length() ? outFrames.ElementAt(0) : nullptr;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
|
|
nsTArray<nsIFrame*> &aOutFrames,
|
|
bool aShouldIgnoreSuppression,
|
|
bool aIgnoreRootScrollFrame)
|
|
{
|
|
SAMPLE_LABEL("nsLayoutUtils","GetFramesForArea");
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
|
|
false);
|
|
nsDisplayList list;
|
|
nsRect target(aRect);
|
|
|
|
if (aShouldIgnoreSuppression) {
|
|
builder.IgnorePaintSuppression();
|
|
}
|
|
|
|
if (aIgnoreRootScrollFrame) {
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
}
|
|
}
|
|
|
|
builder.EnterPresShell(aFrame, target);
|
|
|
|
nsresult rv =
|
|
aFrame->BuildDisplayListForStackingContext(&builder, target, &list);
|
|
|
|
builder.LeavePresShell(aFrame, target);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gDumpEventList) {
|
|
fprintf(stdout, "Event handling --- (%d,%d):\n", aRect.x, aRect.y);
|
|
nsFrame::PrintDisplayList(&builder, list);
|
|
}
|
|
#endif
|
|
|
|
nsDisplayItem::HitTestState hitTestState;
|
|
list.HitTest(&builder, target, &hitTestState, &aOutFrames);
|
|
list.DeleteAll();
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Remove all leaf display items that are not for descendants of
|
|
* aBuilder->GetReferenceFrame() from aList, and move all nsDisplayClip
|
|
* wrappers to their correct locations.
|
|
* @param aExtraPage the page we constructed aList for
|
|
* @param aY the Y-coordinate where aPage would be positioned relative
|
|
* to the main page (aBuilder->GetReferenceFrame()), considering only
|
|
* the content and ignoring page margins and dead space
|
|
* @param aList the list that is modified in-place
|
|
*/
|
|
static void
|
|
PruneDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aExtraPage, nscoord aY, nsDisplayList* aList)
|
|
{
|
|
nsDisplayList newList;
|
|
// The page which we're really constructing a display list for
|
|
nsIFrame* mainPage = aBuilder->RootReferenceFrame();
|
|
|
|
while (true) {
|
|
nsDisplayItem* i = aList->RemoveBottom();
|
|
if (!i)
|
|
break;
|
|
nsDisplayList* subList = i->GetList();
|
|
if (subList) {
|
|
PruneDisplayListForExtraPage(aBuilder, aExtraPage, aY, subList);
|
|
nsDisplayItem::Type type = i->GetType();
|
|
if (type == nsDisplayItem::TYPE_CLIP ||
|
|
type == nsDisplayItem::TYPE_CLIP_ROUNDED_RECT) {
|
|
// This might clip an element which should appear on the first
|
|
// page, and that element might be visible if this uses a 'clip'
|
|
// property with a negative top.
|
|
// The clip area needs to be moved because the frame geometry doesn't
|
|
// put page content frames for adjacent pages vertically adjacent,
|
|
// there are page margins and dead space between them in print
|
|
// preview, and in printing all pages are at (0,0)...
|
|
// XXX we have no way to test this right now that I know of;
|
|
// the 'clip' property requires an abs-pos element and we never
|
|
// paint abs-pos elements that start after the main page
|
|
// (bug 426909).
|
|
nsDisplayClip* clip = static_cast<nsDisplayClip*>(i);
|
|
clip->SetClipRect(clip->GetClipRect() + nsPoint(0, aY) -
|
|
aExtraPage->GetOffsetTo(mainPage));
|
|
}
|
|
newList.AppendToTop(i);
|
|
} else {
|
|
nsIFrame* f = i->GetUnderlyingFrame();
|
|
if (f && nsLayoutUtils::IsProperAncestorFrameCrossDoc(mainPage, f)) {
|
|
// This one is in the page we care about, keep it
|
|
newList.AppendToTop(i);
|
|
} else {
|
|
// We're throwing this away so call its destructor now. The memory
|
|
// is owned by aBuilder which destroys all items at once.
|
|
i->~nsDisplayItem();
|
|
}
|
|
}
|
|
}
|
|
aList->AppendToTop(&newList);
|
|
}
|
|
|
|
static nsresult
|
|
BuildDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aPage, nscoord aY, nsDisplayList* aList)
|
|
{
|
|
nsDisplayList list;
|
|
// Pass an empty dirty rect since we're only interested in finding
|
|
// placeholders whose out-of-flows are in the page
|
|
// aBuilder->GetReferenceFrame(), and the paths to those placeholders
|
|
// have already been marked as NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO.
|
|
// Note that we should still do a prune step since we don't want to
|
|
// rely on dirty-rect checking for correctness.
|
|
nsresult rv = aPage->BuildDisplayListForStackingContext(aBuilder, nsRect(), &list);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
PruneDisplayListForExtraPage(aBuilder, aPage, aY, &list);
|
|
aList->AppendToTop(&list);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetNextPage(nsIFrame* aPageContentFrame)
|
|
{
|
|
// XXX ugh
|
|
nsIFrame* pageFrame = aPageContentFrame->GetParent();
|
|
NS_ASSERTION(pageFrame->GetType() == nsGkAtoms::pageFrame,
|
|
"pageContentFrame has unexpected parent");
|
|
nsIFrame* nextPageFrame = pageFrame->GetNextSibling();
|
|
if (!nextPageFrame)
|
|
return nullptr;
|
|
NS_ASSERTION(nextPageFrame->GetType() == nsGkAtoms::pageFrame,
|
|
"pageFrame's sibling is not a page frame...");
|
|
nsIFrame* f = nextPageFrame->GetFirstPrincipalChild();
|
|
NS_ASSERTION(f, "pageFrame has no page content frame!");
|
|
NS_ASSERTION(f->GetType() == nsGkAtoms::pageContentFrame,
|
|
"pageFrame's child is not page content!");
|
|
return f;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::PaintFrame(nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
|
const nsRegion& aDirtyRegion, nscolor aBackstop,
|
|
uint32_t aFlags)
|
|
{
|
|
SAMPLE_LABEL("nsLayoutUtils","PaintFrame");
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
nsIView* view = aFrame->GetView();
|
|
if (!(view && view->GetWidget() && GetDisplayRootFrame(aFrame) == aFrame)) {
|
|
aFlags &= ~PAINT_WIDGET_LAYERS;
|
|
NS_ASSERTION(aRenderingContext, "need a rendering context");
|
|
}
|
|
}
|
|
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
nsIPresShell* presShell = presContext->PresShell();
|
|
|
|
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
|
bool usingDisplayPort = false;
|
|
nsRect displayport;
|
|
if (rootScrollFrame) {
|
|
nsIContent* content = rootScrollFrame->GetContent();
|
|
if (content) {
|
|
usingDisplayPort = nsLayoutUtils::GetDisplayPort(content, &displayport);
|
|
}
|
|
}
|
|
|
|
bool ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
|
|
nsRegion visibleRegion;
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
// This layer tree will be reused, so we'll need to calculate it
|
|
// for the whole "visible" area of the window
|
|
//
|
|
// |ignoreViewportScrolling| and |usingDisplayPort| are persistent
|
|
// document-rendering state. We rely on PresShell to flush
|
|
// retained layers as needed when that persistent state changes.
|
|
if (!usingDisplayPort) {
|
|
visibleRegion = aFrame->GetVisualOverflowRectRelativeToSelf();
|
|
} else {
|
|
visibleRegion = displayport;
|
|
}
|
|
} else {
|
|
visibleRegion = aDirtyRegion;
|
|
}
|
|
|
|
// If we're going to display something different from what we'd normally
|
|
// paint in a window then we will flush out any retained layer trees before
|
|
// *and after* we draw.
|
|
bool willFlushRetainedLayers = (aFlags & PAINT_HIDE_CARET) != 0;
|
|
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::PAINTING,
|
|
!(aFlags & PAINT_HIDE_CARET));
|
|
if (usingDisplayPort) {
|
|
builder.SetDisplayPort(displayport);
|
|
}
|
|
|
|
nsDisplayList list;
|
|
if (aFlags & PAINT_IN_TRANSFORM) {
|
|
builder.SetInTransform(true);
|
|
}
|
|
if (aFlags & PAINT_SYNC_DECODE_IMAGES) {
|
|
builder.SetSyncDecodeImages(true);
|
|
}
|
|
if (aFlags & (PAINT_WIDGET_LAYERS | PAINT_TO_WINDOW)) {
|
|
builder.SetPaintingToWindow(true);
|
|
}
|
|
if (aFlags & PAINT_IGNORE_SUPPRESSION) {
|
|
builder.IgnorePaintSuppression();
|
|
}
|
|
nsRect canvasArea(nsPoint(0, 0), aFrame->GetSize());
|
|
|
|
#ifdef DEBUG
|
|
if (ignoreViewportScrolling) {
|
|
nsIDocument* doc = aFrame->GetContent() ?
|
|
aFrame->GetContent()->GetCurrentDoc() : nullptr;
|
|
NS_ASSERTION(!aFrame->GetParent() ||
|
|
(doc && doc->IsBeingUsedAsImage()),
|
|
"Only expecting ignoreViewportScrolling for root frames and "
|
|
"for image documents.");
|
|
}
|
|
#endif
|
|
|
|
if (ignoreViewportScrolling && !aFrame->GetParent()) {
|
|
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
nsIScrollableFrame* rootScrollableFrame =
|
|
presShell->GetRootScrollFrameAsScrollable();
|
|
if (aFlags & PAINT_DOCUMENT_RELATIVE) {
|
|
// Make visibleRegion and aRenderingContext relative to the
|
|
// scrolled frame instead of the root frame.
|
|
nsPoint pos = rootScrollableFrame->GetScrollPosition();
|
|
visibleRegion.MoveBy(-pos);
|
|
if (aRenderingContext) {
|
|
aRenderingContext->Translate(pos);
|
|
}
|
|
}
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
|
|
nsCanvasFrame* canvasFrame =
|
|
do_QueryFrame(rootScrollableFrame->GetScrolledFrame());
|
|
if (canvasFrame) {
|
|
// Use UnionRect here to ensure that areas where the scrollbars
|
|
// were are still filled with the background color.
|
|
canvasArea.UnionRect(canvasArea,
|
|
canvasFrame->CanvasArea() + builder.ToReferenceFrame(canvasFrame));
|
|
}
|
|
}
|
|
}
|
|
nsresult rv;
|
|
|
|
nsRect dirtyRect = visibleRegion.GetBounds();
|
|
builder.EnterPresShell(aFrame, dirtyRect);
|
|
{
|
|
SAMPLE_LABEL("nsLayoutUtils","PaintFrame::BuildDisplayList");
|
|
rv = aFrame->BuildDisplayListForStackingContext(&builder, dirtyRect, &list);
|
|
}
|
|
const bool paintAllContinuations = aFlags & PAINT_ALL_CONTINUATIONS;
|
|
NS_ASSERTION(!paintAllContinuations || !aFrame->GetPrevContinuation(),
|
|
"If painting all continuations, the frame must be "
|
|
"first-continuation");
|
|
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
if (NS_SUCCEEDED(rv) && !paintAllContinuations &&
|
|
frameType == nsGkAtoms::pageContentFrame) {
|
|
NS_ASSERTION(!(aFlags & PAINT_WIDGET_LAYERS),
|
|
"shouldn't be painting with widget layers for page content frames");
|
|
// We may need to paint out-of-flow frames whose placeholders are
|
|
// on other pages. Add those pages to our display list. Note that
|
|
// out-of-flow frames can't be placed after their placeholders so
|
|
// we don't have to process earlier pages. The display lists for
|
|
// these extra pages are pruned so that only display items for the
|
|
// page we currently care about (which we would have reached by
|
|
// following placeholders to their out-of-flows) end up on the list.
|
|
nsIFrame* page = aFrame;
|
|
nscoord y = aFrame->GetSize().height;
|
|
while ((page = GetNextPage(page)) != nullptr) {
|
|
SAMPLE_LABEL("nsLayoutUtils","PaintFrame::BuildDisplayListForExtraPage");
|
|
rv = BuildDisplayListForExtraPage(&builder, page, y, &list);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
y += page->GetSize().height;
|
|
}
|
|
}
|
|
|
|
if (paintAllContinuations) {
|
|
nsIFrame* currentFrame = aFrame;
|
|
while (NS_SUCCEEDED(rv) &&
|
|
(currentFrame = currentFrame->GetNextContinuation()) != nullptr) {
|
|
SAMPLE_LABEL("nsLayoutUtils","PaintFrame::ContinuationsBuildDisplayList");
|
|
nsRect frameDirty = dirtyRect - builder.ToReferenceFrame(currentFrame);
|
|
rv = currentFrame->BuildDisplayListForStackingContext(&builder,
|
|
frameDirty, &list);
|
|
}
|
|
}
|
|
|
|
// For the viewport frame in print preview/page layout we want to paint
|
|
// the grey background behind the page, not the canvas color.
|
|
if (frameType == nsGkAtoms::viewportFrame &&
|
|
nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
|
|
nsRect bounds = nsRect(builder.ToReferenceFrame(aFrame),
|
|
aFrame->GetSize());
|
|
rv = presShell->AddPrintPreviewBackgroundItem(builder, list, aFrame, bounds);
|
|
} else if (frameType != nsGkAtoms::pageFrame) {
|
|
// For printing, this function is first called on an nsPageFrame, which
|
|
// creates a display list with a PageContent item. The PageContent item's
|
|
// paint function calls this function on the nsPageFrame's child which is
|
|
// an nsPageContentFrame. We only want to add the canvas background color
|
|
// item once, for the nsPageContentFrame.
|
|
|
|
// Add the canvas background color to the bottom of the list. This
|
|
// happens after we've built the list so that AddCanvasBackgroundColorItem
|
|
// can monkey with the contents if necessary.
|
|
canvasArea.IntersectRect(canvasArea, visibleRegion.GetBounds());
|
|
rv = presShell->AddCanvasBackgroundColorItem(
|
|
builder, list, aFrame, canvasArea, aBackstop);
|
|
|
|
// If the passed in backstop color makes us draw something different from
|
|
// normal, we need to flush layers.
|
|
if ((aFlags & PAINT_WIDGET_LAYERS) && !willFlushRetainedLayers) {
|
|
nsIView* view = aFrame->GetView();
|
|
if (view) {
|
|
nscolor backstop = presShell->ComputeBackstopColor(view);
|
|
// The PresShell's canvas background color doesn't get updated until
|
|
// EnterPresShell, so this check has to be done after that.
|
|
nscolor canvasColor = presShell->GetCanvasBackground();
|
|
if (NS_ComposeColors(aBackstop, canvasColor) !=
|
|
NS_ComposeColors(backstop, canvasColor)) {
|
|
willFlushRetainedLayers = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
builder.LeavePresShell(aFrame, dirtyRect);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (builder.GetHadToIgnorePaintSuppression()) {
|
|
willFlushRetainedLayers = true;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxUtils::sDumpPaintList || gfxUtils::sDumpPainting) {
|
|
if (gfxUtils::sDumpPaintingToFile) {
|
|
nsCString string("dump-");
|
|
string.AppendInt(gPaintCount);
|
|
string.Append(".html");
|
|
gfxUtils::sDumpPaintFile = fopen(string.BeginReading(), "w");
|
|
} else {
|
|
gfxUtils::sDumpPaintFile = stdout;
|
|
}
|
|
if (gfxUtils::sDumpPaintingToFile) {
|
|
fprintf(gfxUtils::sDumpPaintFile, "<html><head><script>var array = {}; function ViewImage(index) { window.location = array[index]; }</script></head><body>");
|
|
}
|
|
fprintf(gfxUtils::sDumpPaintFile, "Painting --- before optimization (dirty %d,%d,%d,%d):\n",
|
|
dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
|
|
nsFrame::PrintDisplayList(&builder, list, gfxUtils::sDumpPaintFile, gfxUtils::sDumpPaintingToFile);
|
|
if (gfxUtils::sDumpPaintingToFile) {
|
|
fprintf(gfxUtils::sDumpPaintFile, "<script>");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
list.ComputeVisibilityForRoot(&builder, &visibleRegion);
|
|
|
|
uint32_t flags = nsDisplayList::PAINT_DEFAULT;
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
flags |= nsDisplayList::PAINT_USE_WIDGET_LAYERS;
|
|
if (willFlushRetainedLayers) {
|
|
// The caller wanted to paint from retained layers, but set up
|
|
// the paint in such a way that we can't use them. We're going
|
|
// to display something different from what we'd normally paint
|
|
// in a window, so make sure we flush out any retained layer
|
|
// trees before *and after* we draw. Callers should be fixed to
|
|
// not do this.
|
|
NS_WARNING("Flushing retained layers!");
|
|
flags |= nsDisplayList::PAINT_FLUSH_LAYERS;
|
|
} else if (!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
|
nsIWidget *widget = aFrame->GetNearestWidget();
|
|
if (widget) {
|
|
builder.SetFinalTransparentRegion(visibleRegion);
|
|
// If we're finished building display list items for painting of the outermost
|
|
// pres shell, notify the widget about any toolbars we've encountered.
|
|
widget->UpdateThemeGeometries(builder.GetThemeGeometries());
|
|
}
|
|
}
|
|
}
|
|
if (aFlags & PAINT_EXISTING_TRANSACTION) {
|
|
flags |= nsDisplayList::PAINT_EXISTING_TRANSACTION;
|
|
}
|
|
if (aFlags & PAINT_NO_COMPOSITE) {
|
|
flags |= nsDisplayList::PAINT_NO_COMPOSITE;
|
|
}
|
|
|
|
list.PaintRoot(&builder, aRenderingContext, flags);
|
|
|
|
// Update the widget's opaque region information. This sets
|
|
// glass boundaries on Windows.
|
|
if ((aFlags & PAINT_WIDGET_LAYERS) &&
|
|
!willFlushRetainedLayers &&
|
|
!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
|
nsIWidget *widget = aFrame->GetNearestWidget();
|
|
if (widget) {
|
|
nsRegion excludedRegion = builder.GetExcludedGlassRegion();
|
|
excludedRegion.Sub(excludedRegion, visibleRegion);
|
|
nsIntRegion windowRegion(excludedRegion.ToNearestPixels(presContext->AppUnitsPerDevPixel()));
|
|
widget->UpdateOpaqueRegion(windowRegion);
|
|
}
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
if (gfxUtils::sDumpPaintList || gfxUtils::sDumpPainting) {
|
|
if (gfxUtils::sDumpPaintingToFile) {
|
|
fprintf(gfxUtils::sDumpPaintFile, "</script>");
|
|
}
|
|
fprintf(gfxUtils::sDumpPaintFile, "Painting --- after optimization:\n");
|
|
nsFrame::PrintDisplayList(&builder, list, gfxUtils::sDumpPaintFile, gfxUtils::sDumpPaintingToFile);
|
|
|
|
fprintf(gfxUtils::sDumpPaintFile, "Painting --- retained layer tree:\n");
|
|
nsIWidget* widget = aFrame->GetNearestWidget();
|
|
if (widget) {
|
|
nsRefPtr<LayerManager> layerManager = widget->GetLayerManager();
|
|
if (layerManager) {
|
|
FrameLayerBuilder::DumpRetainedLayerTree(layerManager, gfxUtils::sDumpPaintFile,
|
|
gfxUtils::sDumpPaintingToFile);
|
|
}
|
|
}
|
|
if (gfxUtils::sDumpPaintingToFile) {
|
|
fprintf(gfxUtils::sDumpPaintFile, "</body></html>");
|
|
fclose(gfxUtils::sDumpPaintFile);
|
|
}
|
|
gfxUtils::sDumpPaintFile = NULL;
|
|
gPaintCount++;
|
|
}
|
|
#endif
|
|
|
|
// Flush the list so we don't trigger the IsEmpty-on-destruction assertion
|
|
list.DeleteAll();
|
|
return NS_OK;
|
|
}
|
|
|
|
int32_t
|
|
nsLayoutUtils::GetZIndex(nsIFrame* aFrame) {
|
|
if (!aFrame->IsPositioned())
|
|
return 0;
|
|
|
|
const nsStylePosition* position =
|
|
aFrame->GetStylePosition();
|
|
if (position->mZIndex.GetUnit() == eStyleUnit_Integer)
|
|
return position->mZIndex.GetIntValue();
|
|
|
|
// sort the auto and 0 elements together
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Uses a binary search for find where the cursor falls in the line of text
|
|
* It also keeps track of the part of the string that has already been measured
|
|
* so it doesn't have to keep measuring the same text over and over
|
|
*
|
|
* @param "aBaseWidth" contains the width in twips of the portion
|
|
* of the text that has already been measured, and aBaseInx contains
|
|
* the index of the text that has already been measured.
|
|
*
|
|
* @param aTextWidth returns the (in twips) the length of the text that falls
|
|
* before the cursor aIndex contains the index of the text where the cursor falls
|
|
*/
|
|
bool
|
|
nsLayoutUtils::BinarySearchForPosition(nsRenderingContext* aRendContext,
|
|
const PRUnichar* aText,
|
|
int32_t aBaseWidth,
|
|
int32_t aBaseInx,
|
|
int32_t aStartInx,
|
|
int32_t aEndInx,
|
|
int32_t aCursorPos,
|
|
int32_t& aIndex,
|
|
int32_t& aTextWidth)
|
|
{
|
|
int32_t range = aEndInx - aStartInx;
|
|
if ((range == 1) || (range == 2 && NS_IS_HIGH_SURROGATE(aText[aStartInx]))) {
|
|
aIndex = aStartInx + aBaseInx;
|
|
aTextWidth = aRendContext->GetWidth(aText, aIndex);
|
|
return true;
|
|
}
|
|
|
|
int32_t inx = aStartInx + (range / 2);
|
|
|
|
// Make sure we don't leave a dangling low surrogate
|
|
if (NS_IS_HIGH_SURROGATE(aText[inx-1]))
|
|
inx++;
|
|
|
|
int32_t textWidth = aRendContext->GetWidth(aText, inx);
|
|
|
|
int32_t fullWidth = aBaseWidth + textWidth;
|
|
if (fullWidth == aCursorPos) {
|
|
aTextWidth = textWidth;
|
|
aIndex = inx;
|
|
return true;
|
|
} else if (aCursorPos < fullWidth) {
|
|
aTextWidth = aBaseWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
|
|
return true;
|
|
}
|
|
} else {
|
|
aTextWidth = fullWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
AddBoxesForFrame(nsIFrame* aFrame,
|
|
nsLayoutUtils::BoxCallback* aCallback)
|
|
{
|
|
nsIAtom* pseudoType = aFrame->GetStyleContext()->GetPseudo();
|
|
|
|
if (pseudoType == nsCSSAnonBoxes::tableOuter) {
|
|
AddBoxesForFrame(aFrame->GetFirstPrincipalChild(), aCallback);
|
|
nsIFrame* kid = aFrame->GetFirstChild(nsIFrame::kCaptionList);
|
|
if (kid) {
|
|
AddBoxesForFrame(kid, aCallback);
|
|
}
|
|
} else if (pseudoType == nsCSSAnonBoxes::mozAnonymousBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozAnonymousPositionedBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozMathMLAnonymousBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozXULAnonymousBlock) {
|
|
for (nsIFrame* kid = aFrame->GetFirstPrincipalChild(); kid; kid = kid->GetNextSibling()) {
|
|
AddBoxesForFrame(kid, aCallback);
|
|
}
|
|
} else {
|
|
aCallback->AddBox(aFrame);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::GetAllInFlowBoxes(nsIFrame* aFrame, BoxCallback* aCallback)
|
|
{
|
|
while (aFrame) {
|
|
AddBoxesForFrame(aFrame, aCallback);
|
|
aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame);
|
|
}
|
|
}
|
|
|
|
struct BoxToRect : public nsLayoutUtils::BoxCallback {
|
|
typedef nsSize (*GetRectFromFrameFun)(nsIFrame*);
|
|
|
|
nsIFrame* mRelativeTo;
|
|
nsLayoutUtils::RectCallback* mCallback;
|
|
uint32_t mFlags;
|
|
GetRectFromFrameFun mRectFromFrame;
|
|
|
|
BoxToRect(nsIFrame* aRelativeTo, nsLayoutUtils::RectCallback* aCallback,
|
|
uint32_t aFlags, GetRectFromFrameFun aRectFromFrame)
|
|
: mRelativeTo(aRelativeTo), mCallback(aCallback), mFlags(aFlags),
|
|
mRectFromFrame(aRectFromFrame) {}
|
|
|
|
virtual void AddBox(nsIFrame* aFrame) {
|
|
nsRect r;
|
|
nsIFrame* outer = nsSVGUtils::GetOuterSVGFrameAndCoveredRegion(aFrame, &r);
|
|
if (!outer) {
|
|
outer = aFrame;
|
|
r = nsRect(nsPoint(0, 0), mRectFromFrame(aFrame));
|
|
}
|
|
if (mFlags & nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS) {
|
|
r = nsLayoutUtils::TransformFrameRectToAncestor(outer, r, mRelativeTo);
|
|
} else {
|
|
r += outer->GetOffsetTo(mRelativeTo);
|
|
}
|
|
mCallback->AddRect(r);
|
|
}
|
|
};
|
|
|
|
static nsSize
|
|
GetFrameBorderSize(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->GetSize();
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::GetAllInFlowRects(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
|
RectCallback* aCallback, uint32_t aFlags)
|
|
{
|
|
BoxToRect converter(aRelativeTo, aCallback, aFlags, &GetFrameBorderSize);
|
|
GetAllInFlowBoxes(aFrame, &converter);
|
|
}
|
|
|
|
static nsSize
|
|
GetFramePaddingSize(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->GetPaddingRect().Size();
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::GetAllInFlowPaddingRects(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
|
RectCallback* aCallback, uint32_t aFlags)
|
|
{
|
|
BoxToRect converter(aRelativeTo, aCallback, aFlags, &GetFramePaddingSize);
|
|
GetAllInFlowBoxes(aFrame, &converter);
|
|
}
|
|
|
|
nsLayoutUtils::RectAccumulator::RectAccumulator() : mSeenFirstRect(false) {}
|
|
|
|
void nsLayoutUtils::RectAccumulator::AddRect(const nsRect& aRect) {
|
|
mResultRect.UnionRect(mResultRect, aRect);
|
|
if (!mSeenFirstRect) {
|
|
mSeenFirstRect = true;
|
|
mFirstRect = aRect;
|
|
}
|
|
}
|
|
|
|
nsLayoutUtils::RectListBuilder::RectListBuilder(nsClientRectList* aList)
|
|
: mRectList(aList), mRV(NS_OK) {}
|
|
|
|
void nsLayoutUtils::RectListBuilder::AddRect(const nsRect& aRect) {
|
|
nsRefPtr<nsClientRect> rect = new nsClientRect();
|
|
|
|
rect->SetLayoutRect(aRect);
|
|
mRectList->Append(rect);
|
|
}
|
|
|
|
nsIFrame* nsLayoutUtils::GetContainingBlockForClientRect(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->PresContext()->PresShell()->GetRootFrame();
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::GetAllInFlowRectsUnion(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
|
uint32_t aFlags) {
|
|
RectAccumulator accumulator;
|
|
GetAllInFlowRects(aFrame, aRelativeTo, &accumulator, aFlags);
|
|
return accumulator.mResultRect.IsEmpty() ? accumulator.mFirstRect
|
|
: accumulator.mResultRect;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::GetAllInFlowPaddingRectsUnion(nsIFrame* aFrame,
|
|
nsIFrame* aRelativeTo,
|
|
uint32_t aFlags)
|
|
{
|
|
RectAccumulator accumulator;
|
|
GetAllInFlowPaddingRects(aFrame, aRelativeTo, &accumulator, aFlags);
|
|
return accumulator.mResultRect.IsEmpty() ? accumulator.mFirstRect
|
|
: accumulator.mResultRect;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::GetTextShadowRectsUnion(const nsRect& aTextAndDecorationsRect,
|
|
nsIFrame* aFrame,
|
|
uint32_t aFlags)
|
|
{
|
|
const nsStyleText* textStyle = aFrame->GetStyleText();
|
|
if (!textStyle->HasTextShadow(aFrame))
|
|
return aTextAndDecorationsRect;
|
|
|
|
nsRect resultRect = aTextAndDecorationsRect;
|
|
int32_t A2D = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
for (uint32_t i = 0; i < textStyle->mTextShadow->Length(); ++i) {
|
|
nsCSSShadowItem* shadow = textStyle->mTextShadow->ShadowAt(i);
|
|
nsMargin blur = nsContextBoxBlur::GetBlurRadiusMargin(shadow->mRadius, A2D);
|
|
if ((aFlags & EXCLUDE_BLUR_SHADOWS) && blur != nsMargin(0, 0, 0, 0))
|
|
continue;
|
|
|
|
nsRect tmpRect(aTextAndDecorationsRect);
|
|
|
|
tmpRect.MoveBy(nsPoint(shadow->mXOffset, shadow->mYOffset));
|
|
tmpRect.Inflate(blur);
|
|
|
|
resultRect.UnionRect(resultRect, tmpRect);
|
|
}
|
|
return resultRect;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFontMetricsForFrame(const nsIFrame* aFrame,
|
|
nsFontMetrics** aFontMetrics,
|
|
float aInflation)
|
|
{
|
|
return nsLayoutUtils::GetFontMetricsForStyleContext(aFrame->GetStyleContext(),
|
|
aFontMetrics,
|
|
aInflation);
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFontMetricsForStyleContext(nsStyleContext* aStyleContext,
|
|
nsFontMetrics** aFontMetrics,
|
|
float aInflation)
|
|
{
|
|
// pass the user font set object into the device context to pass along to CreateFontGroup
|
|
gfxUserFontSet* fs = aStyleContext->PresContext()->GetUserFontSet();
|
|
|
|
nsFont font = aStyleContext->GetStyleFont()->mFont;
|
|
// We need to not run font.size through floats when it's large since
|
|
// doing so would be lossy. Fortunately, in such cases, aInflation is
|
|
// guaranteed to be 1.0f.
|
|
if (aInflation != 1.0f) {
|
|
font.size = NSToCoordRound(font.size * aInflation);
|
|
}
|
|
return aStyleContext->PresContext()->DeviceContext()->GetMetricsFor(
|
|
font, aStyleContext->GetStyleFont()->mLanguage,
|
|
fs, *aFontMetrics);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::FindChildContainingDescendant(nsIFrame* aParent, nsIFrame* aDescendantFrame)
|
|
{
|
|
nsIFrame* result = aDescendantFrame;
|
|
|
|
while (result) {
|
|
nsIFrame* parent = result->GetParent();
|
|
if (parent == aParent) {
|
|
break;
|
|
}
|
|
|
|
// The frame is not an immediate child of aParent so walk up another level
|
|
result = parent;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsBlockFrame*
|
|
nsLayoutUtils::GetAsBlock(nsIFrame* aFrame)
|
|
{
|
|
nsBlockFrame* block = do_QueryFrame(aFrame);
|
|
return block;
|
|
}
|
|
|
|
nsBlockFrame*
|
|
nsLayoutUtils::FindNearestBlockAncestor(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* nextAncestor;
|
|
for (nextAncestor = aFrame->GetParent(); nextAncestor;
|
|
nextAncestor = nextAncestor->GetParent()) {
|
|
nsBlockFrame* block = GetAsBlock(nextAncestor);
|
|
if (block)
|
|
return block;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetNonGeneratedAncestor(nsIFrame* aFrame)
|
|
{
|
|
if (!(aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT))
|
|
return aFrame;
|
|
|
|
nsIFrame* f = aFrame;
|
|
do {
|
|
f = GetParentOrPlaceholderFor(f);
|
|
} while (f->GetStateBits() & NS_FRAME_GENERATED_CONTENT);
|
|
return f;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetParentOrPlaceholderFor(nsIFrame* aFrame)
|
|
{
|
|
if ((aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
|
&& !aFrame->GetPrevInFlow()) {
|
|
return aFrame->PresContext()->PresShell()->FrameManager()->
|
|
GetPlaceholderFrameFor(aFrame);
|
|
}
|
|
return aFrame->GetParent();
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetParentOrPlaceholderForCrossDoc(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* f = GetParentOrPlaceholderFor(aFrame);
|
|
if (f)
|
|
return f;
|
|
return GetCrossDocParentFrame(aFrame);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetNextContinuationOrSpecialSibling(nsIFrame *aFrame)
|
|
{
|
|
nsIFrame *result = aFrame->GetNextContinuation();
|
|
if (result)
|
|
return result;
|
|
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) != 0) {
|
|
// We only store the "special sibling" annotation with the first
|
|
// frame in the continuation chain. Walk back to find that frame now.
|
|
aFrame = aFrame->GetFirstContinuation();
|
|
|
|
void* value = aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling());
|
|
return static_cast<nsIFrame*>(value);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFirstContinuationOrSpecialSibling(nsIFrame *aFrame)
|
|
{
|
|
nsIFrame *result = aFrame->GetFirstContinuation();
|
|
if (result->GetStateBits() & NS_FRAME_IS_SPECIAL) {
|
|
while (true) {
|
|
nsIFrame *f = static_cast<nsIFrame*>
|
|
(result->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
if (!f)
|
|
break;
|
|
result = f;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
bool
|
|
nsLayoutUtils::IsViewportScrollbarFrame(nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame)
|
|
return false;
|
|
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (!rootScrollFrame)
|
|
return false;
|
|
|
|
nsIScrollableFrame* rootScrollableFrame = do_QueryFrame(rootScrollFrame);
|
|
NS_ASSERTION(rootScrollableFrame, "The root scorollable frame is null");
|
|
|
|
if (!IsProperAncestorFrame(rootScrollFrame, aFrame))
|
|
return false;
|
|
|
|
nsIFrame* rootScrolledFrame = rootScrollableFrame->GetScrolledFrame();
|
|
return !(rootScrolledFrame == aFrame ||
|
|
IsProperAncestorFrame(rootScrolledFrame, aFrame));
|
|
}
|
|
|
|
static nscoord AddPercents(nsLayoutUtils::IntrinsicWidthType aType,
|
|
nscoord aCurrent, float aPercent)
|
|
{
|
|
nscoord result = aCurrent;
|
|
if (aPercent > 0.0f && aType == nsLayoutUtils::PREF_WIDTH) {
|
|
// XXX Should we also consider percentages for min widths, up to a
|
|
// limit?
|
|
if (aPercent >= 1.0f)
|
|
result = nscoord_MAX;
|
|
else
|
|
result = NSToCoordRound(float(result) / (1.0f - aPercent));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Use only for widths/heights (or their min/max), since it clamps
|
|
// negative calc() results to 0.
|
|
static bool GetAbsoluteCoord(const nsStyleCoord& aStyle, nscoord& aResult)
|
|
{
|
|
if (aStyle.IsCalcUnit()) {
|
|
if (aStyle.CalcHasPercent()) {
|
|
return false;
|
|
}
|
|
// If it has no percents, we can pass 0 for the percentage basis.
|
|
aResult = nsRuleNode::ComputeComputedCalc(aStyle, 0);
|
|
if (aResult < 0)
|
|
aResult = 0;
|
|
return true;
|
|
}
|
|
|
|
if (eStyleUnit_Coord != aStyle.GetUnit())
|
|
return false;
|
|
|
|
aResult = aStyle.GetCoordValue();
|
|
NS_ASSERTION(aResult >= 0, "negative widths not allowed");
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
GetPercentHeight(const nsStyleCoord& aStyle,
|
|
nsIFrame* aFrame,
|
|
nscoord& aResult)
|
|
{
|
|
if (eStyleUnit_Percent != aStyle.GetUnit())
|
|
return false;
|
|
|
|
nsIFrame *f = aFrame->GetContainingBlock();
|
|
if (!f) {
|
|
NS_NOTREACHED("top of frame tree not a containing block");
|
|
return false;
|
|
}
|
|
|
|
const nsStylePosition *pos = f->GetStylePosition();
|
|
nscoord h;
|
|
if (!GetAbsoluteCoord(pos->mHeight, h) &&
|
|
!GetPercentHeight(pos->mHeight, f, h)) {
|
|
NS_ASSERTION(pos->mHeight.GetUnit() == eStyleUnit_Auto ||
|
|
pos->mHeight.HasPercent(),
|
|
"unknown height unit");
|
|
nsIAtom* fType = f->GetType();
|
|
if (fType != nsGkAtoms::viewportFrame && fType != nsGkAtoms::canvasFrame &&
|
|
fType != nsGkAtoms::pageContentFrame) {
|
|
// There's no basis for the percentage height, so it acts like auto.
|
|
// Should we consider a max-height < min-height pair a basis for
|
|
// percentage heights? The spec is somewhat unclear, and not doing
|
|
// so is simpler and avoids troubling discontinuities in behavior,
|
|
// so I'll choose not to. -LDB
|
|
return false;
|
|
}
|
|
|
|
NS_ASSERTION(pos->mHeight.GetUnit() == eStyleUnit_Auto,
|
|
"Unexpected height unit for viewport or canvas or page-content");
|
|
// For the viewport, canvas, and page-content kids, the percentage
|
|
// basis is just the parent height.
|
|
h = f->GetSize().height;
|
|
if (h == NS_UNCONSTRAINEDSIZE) {
|
|
// We don't have a percentage basis after all
|
|
return false;
|
|
}
|
|
}
|
|
|
|
nscoord maxh;
|
|
if (GetAbsoluteCoord(pos->mMaxHeight, maxh) ||
|
|
GetPercentHeight(pos->mMaxHeight, f, maxh)) {
|
|
if (maxh < h)
|
|
h = maxh;
|
|
} else {
|
|
NS_ASSERTION(pos->mMaxHeight.GetUnit() == eStyleUnit_None ||
|
|
pos->mMaxHeight.HasPercent(),
|
|
"unknown max-height unit");
|
|
}
|
|
|
|
nscoord minh;
|
|
if (GetAbsoluteCoord(pos->mMinHeight, minh) ||
|
|
GetPercentHeight(pos->mMinHeight, f, minh)) {
|
|
if (minh > h)
|
|
h = minh;
|
|
} else {
|
|
NS_ASSERTION(pos->mMinHeight.HasPercent() ||
|
|
pos->mMinHeight.GetUnit() == eStyleUnit_Auto,
|
|
"unknown min-height unit");
|
|
}
|
|
|
|
aResult = NSToCoordRound(aStyle.GetPercentValue() * h);
|
|
return true;
|
|
}
|
|
|
|
// Handles only -moz-max-content and -moz-min-content, and
|
|
// -moz-fit-content for min-width and max-width, since the others
|
|
// (-moz-fit-content for width, and -moz-available) have no effect on
|
|
// intrinsic widths.
|
|
enum eWidthProperty { PROP_WIDTH, PROP_MAX_WIDTH, PROP_MIN_WIDTH };
|
|
static bool
|
|
GetIntrinsicCoord(const nsStyleCoord& aStyle,
|
|
nsRenderingContext* aRenderingContext,
|
|
nsIFrame* aFrame,
|
|
eWidthProperty aProperty,
|
|
nscoord& aResult)
|
|
{
|
|
NS_PRECONDITION(aProperty == PROP_WIDTH || aProperty == PROP_MAX_WIDTH ||
|
|
aProperty == PROP_MIN_WIDTH, "unexpected property");
|
|
if (aStyle.GetUnit() != eStyleUnit_Enumerated)
|
|
return false;
|
|
int32_t val = aStyle.GetIntValue();
|
|
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
val == NS_STYLE_WIDTH_MIN_CONTENT ||
|
|
val == NS_STYLE_WIDTH_FIT_CONTENT ||
|
|
val == NS_STYLE_WIDTH_AVAILABLE,
|
|
"unexpected enumerated value for width property");
|
|
if (val == NS_STYLE_WIDTH_AVAILABLE)
|
|
return false;
|
|
if (val == NS_STYLE_WIDTH_FIT_CONTENT) {
|
|
if (aProperty == PROP_WIDTH)
|
|
return false; // handle like 'width: auto'
|
|
if (aProperty == PROP_MAX_WIDTH)
|
|
// constrain large 'width' values down to -moz-max-content
|
|
val = NS_STYLE_WIDTH_MAX_CONTENT;
|
|
else
|
|
// constrain small 'width' or 'max-width' values up to -moz-min-content
|
|
val = NS_STYLE_WIDTH_MIN_CONTENT;
|
|
}
|
|
|
|
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
val == NS_STYLE_WIDTH_MIN_CONTENT,
|
|
"should have reduced everything remaining to one of these");
|
|
|
|
// If aFrame is a container for font size inflation, then shrink
|
|
// wrapping inside of it should not apply font size inflation.
|
|
AutoMaybeDisableFontInflation an(aFrame);
|
|
|
|
if (val == NS_STYLE_WIDTH_MAX_CONTENT)
|
|
aResult = aFrame->GetPrefWidth(aRenderingContext);
|
|
else
|
|
aResult = aFrame->GetMinWidth(aRenderingContext);
|
|
return true;
|
|
}
|
|
|
|
#undef DEBUG_INTRINSIC_WIDTH
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
static int32_t gNoiseIndent = 0;
|
|
#endif
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
|
|
nsIFrame *aFrame,
|
|
IntrinsicWidthType aType)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null frame");
|
|
NS_PRECONDITION(aType == MIN_WIDTH || aType == PREF_WIDTH, "bad type");
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width for container:\n",
|
|
aType == MIN_WIDTH ? "min" : "pref");
|
|
#endif
|
|
|
|
// If aFrame is a container for font size inflation, then shrink
|
|
// wrapping inside of it should not apply font size inflation.
|
|
AutoMaybeDisableFontInflation an(aFrame);
|
|
|
|
nsIFrame::IntrinsicWidthOffsetData offsets =
|
|
aFrame->IntrinsicWidthOffsets(aRenderingContext);
|
|
|
|
const nsStylePosition *stylePos = aFrame->GetStylePosition();
|
|
uint8_t boxSizing = stylePos->mBoxSizing;
|
|
const nsStyleCoord &styleWidth = stylePos->mWidth;
|
|
const nsStyleCoord &styleMinWidth = stylePos->mMinWidth;
|
|
const nsStyleCoord &styleMaxWidth = stylePos->mMaxWidth;
|
|
|
|
// We build up two values starting with the content box, and then
|
|
// adding padding, border and margin. The result is normally
|
|
// |result|. Then, when we handle 'width', 'min-width', and
|
|
// 'max-width', we use the results we've been building in |min| as a
|
|
// minimum, overriding 'min-width'. This ensures two things:
|
|
// * that we don't let a value of 'box-sizing' specifying a width
|
|
// smaller than the padding/border inside the box-sizing box give
|
|
// a content width less than zero
|
|
// * that we prevent tables from becoming smaller than their
|
|
// intrinsic minimum width
|
|
nscoord result = 0, min = 0;
|
|
|
|
nscoord maxw;
|
|
bool haveFixedMaxWidth = GetAbsoluteCoord(styleMaxWidth, maxw);
|
|
nscoord minw;
|
|
|
|
// Treat "min-width: auto" as 0.
|
|
bool haveFixedMinWidth;
|
|
if (eStyleUnit_Auto == styleMinWidth.GetUnit()) {
|
|
// NOTE: Technically, "auto" is supposed to behave like "min-content" on
|
|
// flex items. However, we don't need to worry about that here, because
|
|
// flex items' min-sizes are intentionally ignored until the flex
|
|
// container explicitly considers them during space distribution.
|
|
minw = 0;
|
|
haveFixedMinWidth = true;
|
|
} else {
|
|
haveFixedMinWidth = GetAbsoluteCoord(styleMinWidth, minw);
|
|
}
|
|
|
|
// If we have a specified width (or a specified 'min-width' greater
|
|
// than the specified 'max-width', which works out to the same thing),
|
|
// don't even bother getting the frame's intrinsic width.
|
|
if (styleWidth.GetUnit() == eStyleUnit_Enumerated &&
|
|
(styleWidth.GetIntValue() == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
styleWidth.GetIntValue() == NS_STYLE_WIDTH_MIN_CONTENT)) {
|
|
// -moz-fit-content and -moz-available enumerated widths compute intrinsic
|
|
// widths just like auto.
|
|
// For -moz-max-content and -moz-min-content, we handle them like
|
|
// specified widths, but ignore -moz-box-sizing.
|
|
boxSizing = NS_STYLE_BOX_SIZING_CONTENT;
|
|
} else if (styleWidth.GetUnit() != eStyleUnit_Coord &&
|
|
!(haveFixedMinWidth && haveFixedMaxWidth && maxw <= minw)) {
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
++gNoiseIndent;
|
|
#endif
|
|
if (aType == MIN_WIDTH)
|
|
result = aFrame->GetMinWidth(aRenderingContext);
|
|
else
|
|
result = aFrame->GetPrefWidth(aRenderingContext);
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
--gNoiseIndent;
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width from frame is %d.\n",
|
|
aType == MIN_WIDTH ? "min" : "pref", result);
|
|
#endif
|
|
|
|
// Handle elements with an intrinsic ratio (or size) and a specified
|
|
// height, min-height, or max-height.
|
|
// NOTE: We treat "min-height:auto" as "0" for the purpose of this code,
|
|
// since that's what it means in all cases except for on flex items -- and
|
|
// even there, we're supposed to ignore it (i.e. treat it as 0) until the
|
|
// flex container explicitly considers it.
|
|
const nsStyleCoord &styleHeight = stylePos->mHeight;
|
|
const nsStyleCoord &styleMinHeight = stylePos->mMinHeight;
|
|
const nsStyleCoord &styleMaxHeight = stylePos->mMaxHeight;
|
|
|
|
if (styleHeight.GetUnit() != eStyleUnit_Auto ||
|
|
!(styleMinHeight.GetUnit() == eStyleUnit_Auto ||
|
|
(styleMinHeight.GetUnit() == eStyleUnit_Coord &&
|
|
styleMinHeight.GetCoordValue() == 0)) ||
|
|
styleMaxHeight.GetUnit() != eStyleUnit_None) {
|
|
|
|
nsSize ratio = aFrame->GetIntrinsicRatio();
|
|
|
|
if (ratio.height != 0) {
|
|
|
|
nscoord h;
|
|
if (GetAbsoluteCoord(styleHeight, h) ||
|
|
GetPercentHeight(styleHeight, aFrame, h)) {
|
|
result =
|
|
NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
}
|
|
|
|
if (GetAbsoluteCoord(styleMaxHeight, h) ||
|
|
GetPercentHeight(styleMaxHeight, aFrame, h)) {
|
|
h = NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
if (h < result)
|
|
result = h;
|
|
}
|
|
|
|
if (GetAbsoluteCoord(styleMinHeight, h) ||
|
|
GetPercentHeight(styleMinHeight, aFrame, h)) {
|
|
h = NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
if (h > result)
|
|
result = h;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aFrame->GetType() == nsGkAtoms::tableFrame) {
|
|
// Tables can't shrink smaller than their intrinsic minimum width,
|
|
// no matter what.
|
|
min = aFrame->GetMinWidth(aRenderingContext);
|
|
}
|
|
|
|
// We also need to track what has been added on outside of the box
|
|
// (controlled by 'box-sizing') where 'width', 'min-width' and
|
|
// 'max-width' are applied. We have to account for these properties
|
|
// after getting all the offsets (margin, border, padding) because
|
|
// percentages do not operate linearly.
|
|
// Doing this is ok because although percentages aren't handled
|
|
// linearly, they are handled monotonically.
|
|
nscoord coordOutsideWidth = offsets.hPadding;
|
|
float pctOutsideWidth = offsets.hPctPadding;
|
|
|
|
float pctTotal = 0.0f;
|
|
|
|
if (boxSizing == NS_STYLE_BOX_SIZING_PADDING) {
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
coordOutsideWidth = 0;
|
|
pctOutsideWidth = 0.0f;
|
|
}
|
|
|
|
coordOutsideWidth += offsets.hBorder;
|
|
|
|
if (boxSizing == NS_STYLE_BOX_SIZING_BORDER) {
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
coordOutsideWidth = 0;
|
|
pctOutsideWidth = 0.0f;
|
|
}
|
|
|
|
coordOutsideWidth += offsets.hMargin;
|
|
pctOutsideWidth += offsets.hPctMargin;
|
|
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
nscoord w;
|
|
if (GetAbsoluteCoord(styleWidth, w) ||
|
|
GetIntrinsicCoord(styleWidth, aRenderingContext, aFrame,
|
|
PROP_WIDTH, w)) {
|
|
result = AddPercents(aType, w + coordOutsideWidth, pctOutsideWidth);
|
|
}
|
|
else if (aType == MIN_WIDTH &&
|
|
// The only cases of coord-percent-calc() units that
|
|
// GetAbsoluteCoord didn't handle are percent and calc()s
|
|
// containing percent.
|
|
styleWidth.IsCoordPercentCalcUnit() &&
|
|
aFrame->IsFrameOfType(nsIFrame::eReplaced)) {
|
|
// A percentage width on replaced elements means they can shrink to 0.
|
|
result = 0; // let |min| handle padding/border/margin
|
|
}
|
|
else {
|
|
// NOTE: We could really do a lot better for percents and for some
|
|
// cases of calc() containing percent (certainly including any where
|
|
// the coefficient on the percent is positive and there are no max()
|
|
// expressions). However, doing better for percents wouldn't be
|
|
// backwards compatible.
|
|
result = AddPercents(aType, result, pctTotal);
|
|
}
|
|
|
|
if (haveFixedMaxWidth ||
|
|
GetIntrinsicCoord(styleMaxWidth, aRenderingContext, aFrame,
|
|
PROP_MAX_WIDTH, maxw)) {
|
|
maxw = AddPercents(aType, maxw + coordOutsideWidth, pctOutsideWidth);
|
|
if (result > maxw)
|
|
result = maxw;
|
|
}
|
|
|
|
if (haveFixedMinWidth ||
|
|
GetIntrinsicCoord(styleMinWidth, aRenderingContext, aFrame,
|
|
PROP_MIN_WIDTH, minw)) {
|
|
minw = AddPercents(aType, minw + coordOutsideWidth, pctOutsideWidth);
|
|
if (result < minw)
|
|
result = minw;
|
|
}
|
|
|
|
min = AddPercents(aType, min, pctTotal);
|
|
if (result < min)
|
|
result = min;
|
|
|
|
const nsStyleDisplay *disp = aFrame->GetStyleDisplay();
|
|
if (aFrame->IsThemed(disp)) {
|
|
nsIntSize size(0, 0);
|
|
bool canOverride = true;
|
|
nsPresContext *presContext = aFrame->PresContext();
|
|
presContext->GetTheme()->
|
|
GetMinimumWidgetSize(aRenderingContext, aFrame, disp->mAppearance,
|
|
&size, &canOverride);
|
|
|
|
nscoord themeWidth = presContext->DevPixelsToAppUnits(size.width);
|
|
|
|
// GMWS() returns a border-box width
|
|
themeWidth += offsets.hMargin;
|
|
themeWidth = AddPercents(aType, themeWidth, offsets.hPctMargin);
|
|
|
|
if (themeWidth > result || !canOverride)
|
|
result = themeWidth;
|
|
}
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width for container is %d twips.\n",
|
|
aType == MIN_WIDTH ? "min" : "pref", result);
|
|
#endif
|
|
|
|
return result;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeWidthDependentValue(
|
|
nscoord aContainingBlockWidth,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
NS_WARN_IF_FALSE(aContainingBlockWidth != NS_UNCONSTRAINEDSIZE,
|
|
"have unconstrained width; this should only result from "
|
|
"very large sizes, not attempts at intrinsic width "
|
|
"calculation");
|
|
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockWidth);
|
|
}
|
|
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
|
aCoord.GetUnit() == eStyleUnit_Auto,
|
|
"unexpected width value");
|
|
return 0;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeWidthValue(
|
|
nsRenderingContext* aRenderingContext,
|
|
nsIFrame* aFrame,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContentEdgeToBoxSizing,
|
|
nscoord aBoxSizingToMarginEdge,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
NS_PRECONDITION(aFrame, "non-null frame expected");
|
|
NS_PRECONDITION(aRenderingContext, "non-null rendering context expected");
|
|
NS_WARN_IF_FALSE(aContainingBlockWidth != NS_UNCONSTRAINEDSIZE,
|
|
"have unconstrained width; this should only result from "
|
|
"very large sizes, not attempts at intrinsic width "
|
|
"calculation");
|
|
NS_PRECONDITION(aContainingBlockWidth >= 0,
|
|
"width less than zero");
|
|
|
|
nscoord result;
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
result = nsRuleNode::ComputeCoordPercentCalc(aCoord,
|
|
aContainingBlockWidth);
|
|
// The result of a calc() expression might be less than 0; we
|
|
// should clamp at runtime (below). (Percentages and coords that
|
|
// are less than 0 have already been dropped by the parser.)
|
|
result -= aContentEdgeToBoxSizing;
|
|
} else {
|
|
MOZ_ASSERT(eStyleUnit_Enumerated == aCoord.GetUnit());
|
|
// If aFrame is a container for font size inflation, then shrink
|
|
// wrapping inside of it should not apply font size inflation.
|
|
AutoMaybeDisableFontInflation an(aFrame);
|
|
|
|
int32_t val = aCoord.GetIntValue();
|
|
switch (val) {
|
|
case NS_STYLE_WIDTH_MAX_CONTENT:
|
|
result = aFrame->GetPrefWidth(aRenderingContext);
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
break;
|
|
case NS_STYLE_WIDTH_MIN_CONTENT:
|
|
result = aFrame->GetMinWidth(aRenderingContext);
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
break;
|
|
case NS_STYLE_WIDTH_FIT_CONTENT:
|
|
{
|
|
nscoord pref = aFrame->GetPrefWidth(aRenderingContext),
|
|
min = aFrame->GetMinWidth(aRenderingContext),
|
|
fill = aContainingBlockWidth -
|
|
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
|
result = NS_MAX(min, NS_MIN(pref, fill));
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
}
|
|
break;
|
|
case NS_STYLE_WIDTH_AVAILABLE:
|
|
result = aContainingBlockWidth -
|
|
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
|
}
|
|
}
|
|
|
|
return NS_MAX(0, result);
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeHeightDependentValue(
|
|
nscoord aContainingBlockHeight,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
// XXXldb Some callers explicitly check aContainingBlockHeight
|
|
// against NS_AUTOHEIGHT *and* unit against eStyleUnit_Percent or
|
|
// calc()s containing percents before calling this function.
|
|
// However, it would be much more likely to catch problems without
|
|
// the unit conditions.
|
|
// XXXldb Many callers pass a non-'auto' containing block height when
|
|
// according to CSS2.1 they should be passing 'auto'.
|
|
NS_PRECONDITION(NS_AUTOHEIGHT != aContainingBlockHeight ||
|
|
!aCoord.HasPercent(),
|
|
"unexpected containing block height");
|
|
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockHeight);
|
|
}
|
|
|
|
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
|
aCoord.GetUnit() == eStyleUnit_Auto,
|
|
"unexpected height value");
|
|
return 0;
|
|
}
|
|
|
|
#define MULDIV(a,b,c) (nscoord(int64_t(a) * int64_t(b) / int64_t(c)))
|
|
|
|
/* static */ nsSize
|
|
nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
|
|
nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
|
const nsIFrame::IntrinsicSize& aIntrinsicSize,
|
|
nsSize aIntrinsicRatio, nsSize aCBSize,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding)
|
|
{
|
|
const nsStylePosition* stylePos = aFrame->GetStylePosition();
|
|
|
|
// If we're a flex item, we'll compute our size a bit differently.
|
|
const nsStyleCoord* widthStyleCoord = &(stylePos->mWidth);
|
|
const nsStyleCoord* heightStyleCoord = &(stylePos->mHeight);
|
|
|
|
bool isFlexItem = aFrame->IsFlexItem();
|
|
bool isHorizontalFlexItem = false;
|
|
|
|
#ifdef MOZ_FLEXBOX
|
|
if (isFlexItem) {
|
|
// Flex items use their "flex-basis" property in place of their main-size
|
|
// property (e.g. "width") for sizing purposes, *unless* they have
|
|
// "flex-basis:auto", in which case they use their main-size property after
|
|
// all.
|
|
uint32_t flexDirection =
|
|
aFrame->GetParent()->GetStylePosition()->mFlexDirection;
|
|
isHorizontalFlexItem =
|
|
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW ||
|
|
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW_REVERSE;
|
|
|
|
if (stylePos->mFlexBasis.GetUnit() != eStyleUnit_Auto) {
|
|
if (isHorizontalFlexItem) {
|
|
widthStyleCoord = &(stylePos->mFlexBasis);
|
|
} else {
|
|
heightStyleCoord = &(stylePos->mFlexBasis);
|
|
}
|
|
}
|
|
}
|
|
#endif // MOZ_FLEXBOX
|
|
|
|
|
|
// Handle intrinsic sizes and their interaction with
|
|
// {min-,max-,}{width,height} according to the rules in
|
|
// http://www.w3.org/TR/CSS21/visudet.html#min-max-widths
|
|
|
|
// Note: throughout the following section of the function, I avoid
|
|
// a * (b / c) because of its reduced accuracy relative to a * b / c
|
|
// or (a * b) / c (which are equivalent).
|
|
|
|
const bool isAutoWidth = widthStyleCoord->GetUnit() == eStyleUnit_Auto;
|
|
const bool isAutoHeight = IsAutoHeight(*heightStyleCoord, aCBSize.height);
|
|
|
|
nsSize boxSizingAdjust(0,0);
|
|
switch (stylePos->mBoxSizing) {
|
|
case NS_STYLE_BOX_SIZING_BORDER:
|
|
boxSizingAdjust += aBorder;
|
|
// fall through
|
|
case NS_STYLE_BOX_SIZING_PADDING:
|
|
boxSizingAdjust += aPadding;
|
|
}
|
|
nscoord boxSizingToMarginEdgeWidth =
|
|
aMargin.width + aBorder.width + aPadding.width - boxSizingAdjust.width;
|
|
|
|
nscoord width, minWidth, maxWidth, height, minHeight, maxHeight;
|
|
|
|
if (!isAutoWidth) {
|
|
width = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, *widthStyleCoord);
|
|
}
|
|
|
|
if (stylePos->mMaxWidth.GetUnit() != eStyleUnit_None &&
|
|
!(isFlexItem && isHorizontalFlexItem)) {
|
|
maxWidth = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, stylePos->mMaxWidth);
|
|
} else {
|
|
maxWidth = nscoord_MAX;
|
|
}
|
|
|
|
// NOTE: Flex items ignore their min & max sizing properties in their
|
|
// flex container's main-axis. (Those properties get applied later in
|
|
// the flexbox algorithm.)
|
|
if (stylePos->mMinWidth.GetUnit() != eStyleUnit_Auto &&
|
|
!(isFlexItem && isHorizontalFlexItem)) {
|
|
minWidth = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, stylePos->mMinWidth);
|
|
} else {
|
|
// Treat "min-width: auto" as 0.
|
|
// NOTE: Technically, "auto" is supposed to behave like "min-content" on
|
|
// flex items. However, we don't need to worry about that here, because
|
|
// flex items' min-sizes are intentionally ignored until the flex
|
|
// container explicitly considers them during space distribution.
|
|
minWidth = 0;
|
|
}
|
|
|
|
if (!isAutoHeight) {
|
|
height = nsLayoutUtils::ComputeHeightValue(aCBSize.height,
|
|
boxSizingAdjust.height,
|
|
*heightStyleCoord);
|
|
}
|
|
|
|
if (!IsAutoHeight(stylePos->mMaxHeight, aCBSize.height) &&
|
|
!(isFlexItem && !isHorizontalFlexItem)) {
|
|
maxHeight = nsLayoutUtils::ComputeHeightValue(aCBSize.height,
|
|
boxSizingAdjust.height,
|
|
stylePos->mMaxHeight);
|
|
} else {
|
|
maxHeight = nscoord_MAX;
|
|
}
|
|
|
|
if (!IsAutoHeight(stylePos->mMinHeight, aCBSize.height) &&
|
|
!(isFlexItem && !isHorizontalFlexItem)) {
|
|
minHeight = nsLayoutUtils::ComputeHeightValue(aCBSize.height,
|
|
boxSizingAdjust.height,
|
|
stylePos->mMinHeight);
|
|
} else {
|
|
minHeight = 0;
|
|
}
|
|
|
|
// Resolve percentage intrinsic width/height as necessary:
|
|
|
|
NS_ASSERTION(aCBSize.width != NS_UNCONSTRAINEDSIZE,
|
|
"Our containing block must not have unconstrained width!");
|
|
|
|
bool hasIntrinsicWidth, hasIntrinsicHeight;
|
|
nscoord intrinsicWidth, intrinsicHeight;
|
|
|
|
if (aIntrinsicSize.width.GetUnit() == eStyleUnit_Coord) {
|
|
hasIntrinsicWidth = true;
|
|
intrinsicWidth = aIntrinsicSize.width.GetCoordValue();
|
|
if (intrinsicWidth < 0)
|
|
intrinsicWidth = 0;
|
|
} else {
|
|
NS_ASSERTION(aIntrinsicSize.width.GetUnit() == eStyleUnit_None,
|
|
"unexpected unit");
|
|
hasIntrinsicWidth = false;
|
|
intrinsicWidth = 0;
|
|
}
|
|
|
|
if (aIntrinsicSize.height.GetUnit() == eStyleUnit_Coord) {
|
|
hasIntrinsicHeight = true;
|
|
intrinsicHeight = aIntrinsicSize.height.GetCoordValue();
|
|
if (intrinsicHeight < 0)
|
|
intrinsicHeight = 0;
|
|
} else {
|
|
NS_ASSERTION(aIntrinsicSize.height.GetUnit() == eStyleUnit_None,
|
|
"unexpected unit");
|
|
hasIntrinsicHeight = false;
|
|
intrinsicHeight = 0;
|
|
}
|
|
|
|
NS_ASSERTION(aIntrinsicRatio.width >= 0 && aIntrinsicRatio.height >= 0,
|
|
"Intrinsic ratio has a negative component!");
|
|
|
|
// Now calculate the used values for width and height:
|
|
|
|
if (isAutoWidth) {
|
|
if (isAutoHeight) {
|
|
|
|
// 'auto' width, 'auto' height
|
|
|
|
// Get tentative values - CSS 2.1 sections 10.3.2 and 10.6.2:
|
|
|
|
nscoord tentWidth, tentHeight;
|
|
|
|
if (hasIntrinsicWidth) {
|
|
tentWidth = intrinsicWidth;
|
|
} else if (hasIntrinsicHeight && aIntrinsicRatio.height > 0) {
|
|
tentWidth = MULDIV(intrinsicHeight, aIntrinsicRatio.width, aIntrinsicRatio.height);
|
|
} else if (aIntrinsicRatio.width > 0) {
|
|
tentWidth = aCBSize.width - boxSizingToMarginEdgeWidth; // XXX scrollbar?
|
|
if (tentWidth < 0) tentWidth = 0;
|
|
} else {
|
|
tentWidth = nsPresContext::CSSPixelsToAppUnits(300);
|
|
}
|
|
|
|
if (hasIntrinsicHeight) {
|
|
tentHeight = intrinsicHeight;
|
|
} else if (aIntrinsicRatio.width > 0) {
|
|
tentHeight = MULDIV(tentWidth, aIntrinsicRatio.height, aIntrinsicRatio.width);
|
|
} else {
|
|
tentHeight = nsPresContext::CSSPixelsToAppUnits(150);
|
|
}
|
|
|
|
return ComputeAutoSizeWithIntrinsicDimensions(minWidth, minHeight,
|
|
maxWidth, maxHeight,
|
|
tentWidth, tentHeight);
|
|
} else {
|
|
|
|
// 'auto' width, non-'auto' height
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
if (aIntrinsicRatio.height > 0) {
|
|
width = MULDIV(height, aIntrinsicRatio.width, aIntrinsicRatio.height);
|
|
} else if (hasIntrinsicWidth) {
|
|
width = intrinsicWidth;
|
|
} else {
|
|
width = nsPresContext::CSSPixelsToAppUnits(300);
|
|
}
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
|
|
}
|
|
} else {
|
|
if (isAutoHeight) {
|
|
|
|
// non-'auto' width, 'auto' height
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
if (aIntrinsicRatio.width > 0) {
|
|
height = MULDIV(width, aIntrinsicRatio.height, aIntrinsicRatio.width);
|
|
} else if (hasIntrinsicHeight) {
|
|
height = intrinsicHeight;
|
|
} else {
|
|
height = nsPresContext::CSSPixelsToAppUnits(150);
|
|
}
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
|
|
} else {
|
|
|
|
// non-'auto' width, non-'auto' height
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
|
|
}
|
|
}
|
|
|
|
return nsSize(width, height);
|
|
}
|
|
|
|
nsSize
|
|
nsLayoutUtils::ComputeAutoSizeWithIntrinsicDimensions(nscoord minWidth, nscoord minHeight,
|
|
nscoord maxWidth, nscoord maxHeight,
|
|
nscoord tentWidth, nscoord tentHeight)
|
|
{
|
|
// Now apply min/max-width/height - CSS 2.1 sections 10.4 and 10.7:
|
|
|
|
if (minWidth > maxWidth)
|
|
maxWidth = minWidth;
|
|
if (minHeight > maxHeight)
|
|
maxHeight = minHeight;
|
|
|
|
nscoord heightAtMaxWidth, heightAtMinWidth,
|
|
widthAtMaxHeight, widthAtMinHeight;
|
|
|
|
if (tentWidth > 0) {
|
|
heightAtMaxWidth = MULDIV(maxWidth, tentHeight, tentWidth);
|
|
if (heightAtMaxWidth < minHeight)
|
|
heightAtMaxWidth = minHeight;
|
|
heightAtMinWidth = MULDIV(minWidth, tentHeight, tentWidth);
|
|
if (heightAtMinWidth > maxHeight)
|
|
heightAtMinWidth = maxHeight;
|
|
} else {
|
|
heightAtMaxWidth = heightAtMinWidth = NS_CSS_MINMAX(tentHeight, minHeight, maxHeight);
|
|
}
|
|
|
|
if (tentHeight > 0) {
|
|
widthAtMaxHeight = MULDIV(maxHeight, tentWidth, tentHeight);
|
|
if (widthAtMaxHeight < minWidth)
|
|
widthAtMaxHeight = minWidth;
|
|
widthAtMinHeight = MULDIV(minHeight, tentWidth, tentHeight);
|
|
if (widthAtMinHeight > maxWidth)
|
|
widthAtMinHeight = maxWidth;
|
|
} else {
|
|
widthAtMaxHeight = widthAtMinHeight = NS_CSS_MINMAX(tentWidth, minWidth, maxWidth);
|
|
}
|
|
|
|
// The table at http://www.w3.org/TR/CSS21/visudet.html#min-max-widths :
|
|
|
|
nscoord width, height;
|
|
|
|
if (tentWidth > maxWidth) {
|
|
if (tentHeight > maxHeight) {
|
|
if (int64_t(maxWidth) * int64_t(tentHeight) <=
|
|
int64_t(maxHeight) * int64_t(tentWidth)) {
|
|
width = maxWidth;
|
|
height = heightAtMaxWidth;
|
|
} else {
|
|
width = widthAtMaxHeight;
|
|
height = maxHeight;
|
|
}
|
|
} else {
|
|
// This also covers "(w > max-width) and (h < min-height)" since in
|
|
// that case (max-width/w < 1), and with (h < min-height):
|
|
// max(max-width * h/w, min-height) == min-height
|
|
width = maxWidth;
|
|
height = heightAtMaxWidth;
|
|
}
|
|
} else if (tentWidth < minWidth) {
|
|
if (tentHeight < minHeight) {
|
|
if (int64_t(minWidth) * int64_t(tentHeight) <=
|
|
int64_t(minHeight) * int64_t(tentWidth)) {
|
|
width = widthAtMinHeight;
|
|
height = minHeight;
|
|
} else {
|
|
width = minWidth;
|
|
height = heightAtMinWidth;
|
|
}
|
|
} else {
|
|
// This also covers "(w < min-width) and (h > max-height)" since in
|
|
// that case (min-width/w > 1), and with (h > max-height):
|
|
// min(min-width * h/w, max-height) == max-height
|
|
width = minWidth;
|
|
height = heightAtMinWidth;
|
|
}
|
|
} else {
|
|
if (tentHeight > maxHeight) {
|
|
width = widthAtMaxHeight;
|
|
height = maxHeight;
|
|
} else if (tentHeight < minHeight) {
|
|
width = widthAtMinHeight;
|
|
height = minHeight;
|
|
} else {
|
|
width = tentWidth;
|
|
height = tentHeight;
|
|
}
|
|
}
|
|
|
|
return nsSize(width, height);
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::MinWidthFromInline(nsIFrame* aFrame,
|
|
nsRenderingContext* aRenderingContext)
|
|
{
|
|
NS_ASSERTION(!nsLayoutUtils::IsContainerForFontSizeInflation(aFrame),
|
|
"should not be container for font size inflation");
|
|
|
|
nsIFrame::InlineMinWidthData data;
|
|
DISPLAY_MIN_WIDTH(aFrame, data.prevLines);
|
|
aFrame->AddInlineMinWidth(aRenderingContext, &data);
|
|
data.ForceBreak(aRenderingContext);
|
|
return data.prevLines;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::PrefWidthFromInline(nsIFrame* aFrame,
|
|
nsRenderingContext* aRenderingContext)
|
|
{
|
|
NS_ASSERTION(!nsLayoutUtils::IsContainerForFontSizeInflation(aFrame),
|
|
"should not be container for font size inflation");
|
|
|
|
nsIFrame::InlinePrefWidthData data;
|
|
DISPLAY_PREF_WIDTH(aFrame, data.prevLines);
|
|
aFrame->AddInlinePrefWidth(aRenderingContext, &data);
|
|
data.ForceBreak(aRenderingContext);
|
|
return data.prevLines;
|
|
}
|
|
|
|
static nscolor
|
|
DarkenColor(nscolor aColor)
|
|
{
|
|
uint16_t hue, sat, value;
|
|
uint8_t alpha;
|
|
|
|
// convert the RBG to HSV so we can get the lightness (which is the v)
|
|
NS_RGB2HSV(aColor, hue, sat, value, alpha);
|
|
|
|
// The goal here is to send white to black while letting colored
|
|
// stuff stay colored... So we adopt the following approach.
|
|
// Something with sat = 0 should end up with value = 0. Something
|
|
// with a high sat can end up with a high value and it's ok.... At
|
|
// the same time, we don't want to make things lighter. Do
|
|
// something simple, since it seems to work.
|
|
if (value > sat) {
|
|
value = sat;
|
|
// convert this color back into the RGB color space.
|
|
NS_HSV2RGB(aColor, hue, sat, value, alpha);
|
|
}
|
|
return aColor;
|
|
}
|
|
|
|
// Check whether we should darken text/decoration colors. We need to do this if
|
|
// background images and colors are being suppressed, because that means
|
|
// light text will not be visible against the (presumed light-colored) background.
|
|
static bool
|
|
ShouldDarkenColors(nsPresContext* aPresContext)
|
|
{
|
|
return !aPresContext->GetBackgroundColorDraw() &&
|
|
!aPresContext->GetBackgroundImageDraw();
|
|
}
|
|
|
|
nscolor
|
|
nsLayoutUtils::GetColor(nsIFrame* aFrame, nsCSSProperty aProperty)
|
|
{
|
|
nscolor color = aFrame->GetVisitedDependentColor(aProperty);
|
|
if (ShouldDarkenColors(aFrame->PresContext())) {
|
|
color = DarkenColor(color);
|
|
}
|
|
return color;
|
|
}
|
|
|
|
gfxFloat
|
|
nsLayoutUtils::GetSnappedBaselineY(nsIFrame* aFrame, gfxContext* aContext,
|
|
nscoord aY, nscoord aAscent)
|
|
{
|
|
gfxFloat appUnitsPerDevUnit = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxFloat baseline = gfxFloat(aY) + aAscent;
|
|
gfxRect putativeRect(0, baseline/appUnitsPerDevUnit, 1, 1);
|
|
if (!aContext->UserToDevicePixelSnapped(putativeRect, true))
|
|
return baseline;
|
|
return aContext->DeviceToUser(putativeRect.TopLeft()).y * appUnitsPerDevUnit;
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::DrawString(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const PRUnichar* aString,
|
|
int32_t aLength,
|
|
nsPoint aPoint,
|
|
uint8_t aDirection)
|
|
{
|
|
#ifdef IBMBIDI
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
if (presContext->BidiEnabled()) {
|
|
if (aDirection == NS_STYLE_DIRECTION_INHERIT) {
|
|
aDirection = aFrame->GetStyleVisibility()->mDirection;
|
|
}
|
|
nsBidiDirection direction =
|
|
(NS_STYLE_DIRECTION_RTL == aDirection) ?
|
|
NSBIDI_RTL : NSBIDI_LTR;
|
|
rv = nsBidiPresUtils::RenderText(aString, aLength, direction,
|
|
presContext, *aContext, *aContext,
|
|
aPoint.x, aPoint.y);
|
|
}
|
|
if (NS_FAILED(rv))
|
|
#endif // IBMBIDI
|
|
{
|
|
aContext->SetTextRunRTL(false);
|
|
aContext->DrawString(aString, aLength, aPoint.x, aPoint.y);
|
|
}
|
|
}
|
|
|
|
nscoord
|
|
nsLayoutUtils::GetStringWidth(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const PRUnichar* aString,
|
|
int32_t aLength)
|
|
{
|
|
#ifdef IBMBIDI
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
if (presContext->BidiEnabled()) {
|
|
const nsStyleVisibility* vis = aFrame->GetStyleVisibility();
|
|
nsBidiDirection direction =
|
|
(NS_STYLE_DIRECTION_RTL == vis->mDirection) ?
|
|
NSBIDI_RTL : NSBIDI_LTR;
|
|
return nsBidiPresUtils::MeasureTextWidth(aString, aLength,
|
|
direction, presContext, *aContext);
|
|
}
|
|
#endif // IBMBIDI
|
|
aContext->SetTextRunRTL(false);
|
|
return aContext->GetWidth(aString, aLength);
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::PaintTextShadow(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const nsRect& aTextRect,
|
|
const nsRect& aDirtyRect,
|
|
const nscolor& aForegroundColor,
|
|
TextShadowCallback aCallback,
|
|
void* aCallbackData)
|
|
{
|
|
const nsStyleText* textStyle = aFrame->GetStyleText();
|
|
if (!textStyle->HasTextShadow(aFrame))
|
|
return;
|
|
|
|
// Text shadow happens with the last value being painted at the back,
|
|
// ie. it is painted first.
|
|
gfxContext* aDestCtx = aContext->ThebesContext();
|
|
for (uint32_t i = textStyle->mTextShadow->Length(); i > 0; --i) {
|
|
nsCSSShadowItem* shadowDetails = textStyle->mTextShadow->ShadowAt(i - 1);
|
|
nsPoint shadowOffset(shadowDetails->mXOffset,
|
|
shadowDetails->mYOffset);
|
|
nscoord blurRadius = NS_MAX(shadowDetails->mRadius, 0);
|
|
|
|
nsRect shadowRect(aTextRect);
|
|
shadowRect.MoveBy(shadowOffset);
|
|
|
|
nsPresContext* presCtx = aFrame->PresContext();
|
|
nsContextBoxBlur contextBoxBlur;
|
|
gfxContext* shadowContext = contextBoxBlur.Init(shadowRect, 0, blurRadius,
|
|
presCtx->AppUnitsPerDevPixel(),
|
|
aDestCtx, aDirtyRect, nullptr);
|
|
if (!shadowContext)
|
|
continue;
|
|
|
|
nscolor shadowColor;
|
|
if (shadowDetails->mHasColor)
|
|
shadowColor = shadowDetails->mColor;
|
|
else
|
|
shadowColor = aForegroundColor;
|
|
|
|
// Conjure an nsRenderingContext from a gfxContext for drawing the text
|
|
// to blur.
|
|
nsRefPtr<nsRenderingContext> renderingContext = new nsRenderingContext();
|
|
renderingContext->Init(presCtx->DeviceContext(), shadowContext);
|
|
|
|
aDestCtx->Save();
|
|
aDestCtx->NewPath();
|
|
aDestCtx->SetColor(gfxRGBA(shadowColor));
|
|
|
|
// The callback will draw whatever we want to blur as a shadow.
|
|
aCallback(renderingContext, shadowOffset, shadowColor, aCallbackData);
|
|
|
|
contextBoxBlur.DoPaint();
|
|
aDestCtx->Restore();
|
|
}
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::GetCenteredFontBaseline(nsFontMetrics* aFontMetrics,
|
|
nscoord aLineHeight)
|
|
{
|
|
nscoord fontAscent = aFontMetrics->MaxAscent();
|
|
nscoord fontHeight = aFontMetrics->MaxHeight();
|
|
|
|
nscoord leading = aLineHeight - fontHeight;
|
|
return fontAscent + leading/2;
|
|
}
|
|
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::GetFirstLineBaseline(const nsIFrame* aFrame, nscoord* aResult)
|
|
{
|
|
LinePosition position;
|
|
if (!GetFirstLinePosition(aFrame, &position))
|
|
return false;
|
|
*aResult = position.mBaseline;
|
|
return true;
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::GetFirstLinePosition(const nsIFrame* aFrame,
|
|
LinePosition* aResult)
|
|
{
|
|
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
|
if (!block) {
|
|
// For the first-line baseline we also have to check for a table, and if
|
|
// so, use the baseline of its first row.
|
|
nsIAtom* fType = aFrame->GetType();
|
|
if (fType == nsGkAtoms::tableOuterFrame) {
|
|
aResult->mTop = 0;
|
|
aResult->mBaseline = aFrame->GetBaseline();
|
|
// This is what we want for the list bullet caller; not sure if
|
|
// other future callers will want the same.
|
|
aResult->mBottom = aFrame->GetSize().height;
|
|
return true;
|
|
}
|
|
|
|
// For first-line baselines, we have to consider scroll frames.
|
|
if (fType == nsGkAtoms::scrollFrame) {
|
|
nsIScrollableFrame *sFrame = do_QueryFrame(const_cast<nsIFrame*>(aFrame));
|
|
if (!sFrame) {
|
|
NS_NOTREACHED("not scroll frame");
|
|
}
|
|
LinePosition kidPosition;
|
|
if (GetFirstLinePosition(sFrame->GetScrolledFrame(), &kidPosition)) {
|
|
// Consider only the border and padding that contributes to the
|
|
// kid's position, not the scrolling, so we get the initial
|
|
// position.
|
|
*aResult = kidPosition + aFrame->GetUsedBorderAndPadding().top;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (fType == nsGkAtoms::fieldSetFrame) {
|
|
LinePosition kidPosition;
|
|
nsIFrame* kid = aFrame->GetFirstPrincipalChild();
|
|
// kid might be a legend frame here, but that's ok.
|
|
if (GetFirstLinePosition(kid, &kidPosition)) {
|
|
*aResult = kidPosition + kid->GetPosition().y;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// No baseline.
|
|
return false;
|
|
}
|
|
|
|
for (nsBlockFrame::const_line_iterator line = block->begin_lines(),
|
|
line_end = block->end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame *kid = line->mFirstChild;
|
|
LinePosition kidPosition;
|
|
if (GetFirstLinePosition(kid, &kidPosition)) {
|
|
*aResult = kidPosition + kid->GetPosition().y;
|
|
return true;
|
|
}
|
|
} else {
|
|
// XXX Is this the right test? We have some bogus empty lines
|
|
// floating around, but IsEmpty is perhaps too weak.
|
|
if (line->GetHeight() != 0 || !line->IsEmpty()) {
|
|
nscoord top = line->mBounds.y;
|
|
aResult->mTop = top;
|
|
aResult->mBaseline = top + line->GetAscent();
|
|
aResult->mBottom = top + line->GetHeight();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::GetLastLineBaseline(const nsIFrame* aFrame, nscoord* aResult)
|
|
{
|
|
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
|
if (!block)
|
|
// No baseline. (We intentionally don't descend into scroll frames.)
|
|
return false;
|
|
|
|
for (nsBlockFrame::const_reverse_line_iterator line = block->rbegin_lines(),
|
|
line_end = block->rend_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame *kid = line->mFirstChild;
|
|
nscoord kidBaseline;
|
|
if (GetLastLineBaseline(kid, &kidBaseline)) {
|
|
*aResult = kidBaseline + kid->GetPosition().y;
|
|
return true;
|
|
} else if (kid->GetType() == nsGkAtoms::scrollFrame) {
|
|
// Use the bottom of the scroll frame.
|
|
// XXX CSS2.1 really doesn't say what to do here.
|
|
*aResult = kid->GetRect().YMost();
|
|
return true;
|
|
}
|
|
} else {
|
|
// XXX Is this the right test? We have some bogus empty lines
|
|
// floating around, but IsEmpty is perhaps too weak.
|
|
if (line->GetHeight() != 0 || !line->IsEmpty()) {
|
|
*aResult = line->mBounds.y + line->GetAscent();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static nscoord
|
|
CalculateBlockContentBottom(nsBlockFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null ptr");
|
|
|
|
nscoord contentBottom = 0;
|
|
|
|
for (nsBlockFrame::line_iterator line = aFrame->begin_lines(),
|
|
line_end = aFrame->end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame* child = line->mFirstChild;
|
|
nscoord offset = child->GetRect().y - child->GetRelativeOffset().y;
|
|
contentBottom = NS_MAX(contentBottom,
|
|
nsLayoutUtils::CalculateContentBottom(child) + offset);
|
|
}
|
|
else {
|
|
contentBottom = NS_MAX(contentBottom, line->mBounds.YMost());
|
|
}
|
|
}
|
|
return contentBottom;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::CalculateContentBottom(nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null ptr");
|
|
|
|
nscoord contentBottom = aFrame->GetRect().height;
|
|
|
|
// We want scrollable overflow rather than visual because this
|
|
// calculation is intended to affect layout.
|
|
if (aFrame->GetScrollableOverflowRect().height > contentBottom) {
|
|
nsIFrame::ChildListIDs skip(nsIFrame::kOverflowList |
|
|
nsIFrame::kExcessOverflowContainersList |
|
|
nsIFrame::kOverflowOutOfFlowList);
|
|
nsBlockFrame* blockFrame = GetAsBlock(aFrame);
|
|
if (blockFrame) {
|
|
contentBottom =
|
|
NS_MAX(contentBottom, CalculateBlockContentBottom(blockFrame));
|
|
skip |= nsIFrame::kPrincipalList;
|
|
}
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
if (!skip.Contains(lists.CurrentID())) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
nscoord offset = child->GetRect().y - child->GetRelativeOffset().y;
|
|
contentBottom = NS_MAX(contentBottom,
|
|
CalculateContentBottom(child) + offset);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return contentBottom;
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
nsLayoutUtils::GetClosestLayer(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* layer;
|
|
for (layer = aFrame; layer; layer = layer->GetParent()) {
|
|
if (layer->IsPositioned() ||
|
|
(layer->GetParent() &&
|
|
layer->GetParent()->GetType() == nsGkAtoms::scrollFrame))
|
|
break;
|
|
}
|
|
if (layer)
|
|
return layer;
|
|
return aFrame->PresContext()->PresShell()->FrameManager()->GetRootFrame();
|
|
}
|
|
|
|
GraphicsFilter
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(nsIFrame* aForFrame)
|
|
{
|
|
GraphicsFilter defaultFilter = gfxPattern::FILTER_GOOD;
|
|
nsIFrame *frame = nsCSSRendering::IsCanvasFrame(aForFrame) ?
|
|
nsCSSRendering::FindBackgroundStyleFrame(aForFrame) : aForFrame;
|
|
|
|
switch (frame->GetStyleSVG()->mImageRendering) {
|
|
case NS_STYLE_IMAGE_RENDERING_OPTIMIZESPEED:
|
|
return gfxPattern::FILTER_FAST;
|
|
case NS_STYLE_IMAGE_RENDERING_OPTIMIZEQUALITY:
|
|
return gfxPattern::FILTER_BEST;
|
|
case NS_STYLE_IMAGE_RENDERING_CRISPEDGES:
|
|
return gfxPattern::FILTER_NEAREST;
|
|
default:
|
|
return defaultFilter;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given an image being drawn into an appunit coordinate system, and
|
|
* a point in that coordinate system, map the point back into image
|
|
* pixel space.
|
|
* @param aSize the size of the image, in pixels
|
|
* @param aDest the rectangle that the image is being mapped into
|
|
* @param aPt a point in the same coordinate system as the rectangle
|
|
*/
|
|
static gfxPoint
|
|
MapToFloatImagePixels(const gfxSize& aSize,
|
|
const gfxRect& aDest, const gfxPoint& aPt)
|
|
{
|
|
return gfxPoint(((aPt.x - aDest.X())*aSize.width)/aDest.Width(),
|
|
((aPt.y - aDest.Y())*aSize.height)/aDest.Height());
|
|
}
|
|
|
|
/**
|
|
* Given an image being drawn into an pixel-based coordinate system, and
|
|
* a point in image space, map the point into the pixel-based coordinate
|
|
* system.
|
|
* @param aSize the size of the image, in pixels
|
|
* @param aDest the rectangle that the image is being mapped into
|
|
* @param aPt a point in image space
|
|
*/
|
|
static gfxPoint
|
|
MapToFloatUserPixels(const gfxSize& aSize,
|
|
const gfxRect& aDest, const gfxPoint& aPt)
|
|
{
|
|
return gfxPoint(aPt.x*aDest.Width()/aSize.width + aDest.X(),
|
|
aPt.y*aDest.Height()/aSize.height + aDest.Y());
|
|
}
|
|
|
|
/* static */ gfxRect
|
|
nsLayoutUtils::RectToGfxRect(const nsRect& aRect, int32_t aAppUnitsPerDevPixel)
|
|
{
|
|
return gfxRect(gfxFloat(aRect.x) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.y) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.width) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.height) / aAppUnitsPerDevPixel);
|
|
}
|
|
|
|
struct SnappedImageDrawingParameters {
|
|
// A transform from either device space or user space (depending on mResetCTM)
|
|
// to image space
|
|
gfxMatrix mUserSpaceToImageSpace;
|
|
// A device-space, pixel-aligned rectangle to fill
|
|
gfxRect mFillRect;
|
|
// A pixel rectangle in tiled image space outside of which gfx should not
|
|
// sample (using EXTEND_PAD as necessary)
|
|
nsIntRect mSubimage;
|
|
// Whether there's anything to draw at all
|
|
bool mShouldDraw;
|
|
// true iff the CTM of the rendering context needs to be reset to the
|
|
// identity matrix before drawing
|
|
bool mResetCTM;
|
|
|
|
SnappedImageDrawingParameters()
|
|
: mShouldDraw(false)
|
|
, mResetCTM(false)
|
|
{}
|
|
|
|
SnappedImageDrawingParameters(const gfxMatrix& aUserSpaceToImageSpace,
|
|
const gfxRect& aFillRect,
|
|
const nsIntRect& aSubimage,
|
|
bool aResetCTM)
|
|
: mUserSpaceToImageSpace(aUserSpaceToImageSpace)
|
|
, mFillRect(aFillRect)
|
|
, mSubimage(aSubimage)
|
|
, mShouldDraw(true)
|
|
, mResetCTM(aResetCTM)
|
|
{}
|
|
};
|
|
|
|
/**
|
|
* Given a set of input parameters, compute certain output parameters
|
|
* for drawing an image with the image snapping algorithm.
|
|
* See https://wiki.mozilla.org/Gecko:Image_Snapping_and_Rendering
|
|
*
|
|
* @see nsLayoutUtils::DrawImage() for the descriptions of input parameters
|
|
*/
|
|
static SnappedImageDrawingParameters
|
|
ComputeSnappedImageDrawingParameters(gfxContext* aCtx,
|
|
int32_t aAppUnitsPerDevPixel,
|
|
const nsRect aDest,
|
|
const nsRect aFill,
|
|
const nsPoint aAnchor,
|
|
const nsRect aDirty,
|
|
const nsIntSize aImageSize)
|
|
|
|
{
|
|
if (aDest.IsEmpty() || aFill.IsEmpty())
|
|
return SnappedImageDrawingParameters();
|
|
|
|
gfxRect devPixelDest =
|
|
nsLayoutUtils::RectToGfxRect(aDest, aAppUnitsPerDevPixel);
|
|
gfxRect devPixelFill =
|
|
nsLayoutUtils::RectToGfxRect(aFill, aAppUnitsPerDevPixel);
|
|
gfxRect devPixelDirty =
|
|
nsLayoutUtils::RectToGfxRect(aDirty, aAppUnitsPerDevPixel);
|
|
|
|
bool ignoreScale = false;
|
|
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
|
|
ignoreScale = true;
|
|
#endif
|
|
gfxRect fill = devPixelFill;
|
|
bool didSnap = aCtx->UserToDevicePixelSnapped(fill, ignoreScale);
|
|
gfxMatrix currentMatrix = aCtx->CurrentMatrix();
|
|
if (didSnap && currentMatrix.HasNonAxisAlignedTransform()) {
|
|
// currentMatrix must have some rotation by a multiple of 90 degrees.
|
|
didSnap = false;
|
|
fill = devPixelFill;
|
|
}
|
|
|
|
gfxSize imageSize(aImageSize.width, aImageSize.height);
|
|
|
|
// Compute the set of pixels that would be sampled by an ideal rendering
|
|
gfxPoint subimageTopLeft =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.TopLeft());
|
|
gfxPoint subimageBottomRight =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.BottomRight());
|
|
nsIntRect intSubimage;
|
|
intSubimage.MoveTo(NSToIntFloor(subimageTopLeft.x),
|
|
NSToIntFloor(subimageTopLeft.y));
|
|
intSubimage.SizeTo(NSToIntCeil(subimageBottomRight.x) - intSubimage.x,
|
|
NSToIntCeil(subimageBottomRight.y) - intSubimage.y);
|
|
|
|
// Compute the anchor point and compute final fill rect.
|
|
// This code assumes that pixel-based devices have one pixel per
|
|
// device unit!
|
|
gfxPoint anchorPoint(gfxFloat(aAnchor.x)/aAppUnitsPerDevPixel,
|
|
gfxFloat(aAnchor.y)/aAppUnitsPerDevPixel);
|
|
gfxPoint imageSpaceAnchorPoint =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, anchorPoint);
|
|
|
|
if (didSnap) {
|
|
imageSpaceAnchorPoint.Round();
|
|
anchorPoint = imageSpaceAnchorPoint;
|
|
anchorPoint = MapToFloatUserPixels(imageSize, devPixelDest, anchorPoint);
|
|
anchorPoint = currentMatrix.Transform(anchorPoint);
|
|
anchorPoint.Round();
|
|
|
|
// This form of Transform is safe to call since non-axis-aligned
|
|
// transforms wouldn't be snapped.
|
|
devPixelDirty = currentMatrix.Transform(devPixelDirty);
|
|
}
|
|
|
|
gfxFloat scaleX = imageSize.width*aAppUnitsPerDevPixel/aDest.width;
|
|
gfxFloat scaleY = imageSize.height*aAppUnitsPerDevPixel/aDest.height;
|
|
if (didSnap) {
|
|
// We'll reset aCTX to the identity matrix before drawing, so we need to
|
|
// adjust our scales to match.
|
|
scaleX /= currentMatrix.xx;
|
|
scaleY /= currentMatrix.yy;
|
|
}
|
|
gfxFloat translateX = imageSpaceAnchorPoint.x - anchorPoint.x*scaleX;
|
|
gfxFloat translateY = imageSpaceAnchorPoint.y - anchorPoint.y*scaleY;
|
|
gfxMatrix transform(scaleX, 0, 0, scaleY, translateX, translateY);
|
|
|
|
gfxRect finalFillRect = fill;
|
|
// If the user-space-to-image-space transform is not a straight
|
|
// translation by integers, then filtering will occur, and
|
|
// restricting the fill rect to the dirty rect would change the values
|
|
// computed for edge pixels, which we can't allow.
|
|
// Also, if didSnap is false then rounding out 'devPixelDirty' might not
|
|
// produce pixel-aligned coordinates, which would also break the values
|
|
// computed for edge pixels.
|
|
if (didSnap && !transform.HasNonIntegerTranslation()) {
|
|
devPixelDirty.RoundOut();
|
|
finalFillRect = fill.Intersect(devPixelDirty);
|
|
}
|
|
if (finalFillRect.IsEmpty())
|
|
return SnappedImageDrawingParameters();
|
|
|
|
return SnappedImageDrawingParameters(transform, finalFillRect, intSubimage,
|
|
didSnap);
|
|
}
|
|
|
|
|
|
static nsresult
|
|
DrawImageInternal(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
const nsIntSize& aImageSize,
|
|
uint32_t aImageFlags)
|
|
{
|
|
if (aDest.Contains(aFill)) {
|
|
aImageFlags |= imgIContainer::FLAG_CLAMP;
|
|
}
|
|
int32_t appUnitsPerDevPixel = aRenderingContext->AppUnitsPerDevPixel();
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
|
|
SnappedImageDrawingParameters drawingParams =
|
|
ComputeSnappedImageDrawingParameters(ctx, appUnitsPerDevPixel, aDest, aFill,
|
|
aAnchor, aDirty, aImageSize);
|
|
|
|
if (!drawingParams.mShouldDraw)
|
|
return NS_OK;
|
|
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(ctx);
|
|
if (drawingParams.mResetCTM) {
|
|
ctx->IdentityMatrix();
|
|
}
|
|
|
|
aImage->Draw(ctx, aGraphicsFilter, drawingParams.mUserSpaceToImageSpace,
|
|
drawingParams.mFillRect, drawingParams.mSubimage, aImageSize,
|
|
aImageFlags);
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::DrawPixelSnapped(nsRenderingContext* aRenderingContext,
|
|
gfxDrawable* aDrawable,
|
|
GraphicsFilter aFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty)
|
|
{
|
|
int32_t appUnitsPerDevPixel = aRenderingContext->AppUnitsPerDevPixel();
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
gfxIntSize drawableSize = aDrawable->Size();
|
|
nsIntSize imageSize(drawableSize.width, drawableSize.height);
|
|
|
|
SnappedImageDrawingParameters drawingParams =
|
|
ComputeSnappedImageDrawingParameters(ctx, appUnitsPerDevPixel, aDest, aFill,
|
|
aAnchor, aDirty, imageSize);
|
|
|
|
if (!drawingParams.mShouldDraw)
|
|
return;
|
|
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(ctx);
|
|
if (drawingParams.mResetCTM) {
|
|
ctx->IdentityMatrix();
|
|
}
|
|
|
|
gfxRect sourceRect =
|
|
drawingParams.mUserSpaceToImageSpace.Transform(drawingParams.mFillRect);
|
|
gfxRect imageRect(0, 0, imageSize.width, imageSize.height);
|
|
gfxRect subimage(drawingParams.mSubimage.x, drawingParams.mSubimage.y,
|
|
drawingParams.mSubimage.width, drawingParams.mSubimage.height);
|
|
|
|
NS_ASSERTION(!sourceRect.Intersect(subimage).IsEmpty(),
|
|
"We must be allowed to sample *some* source pixels!");
|
|
|
|
gfxUtils::DrawPixelSnapped(ctx, aDrawable,
|
|
drawingParams.mUserSpaceToImageSpace, subimage,
|
|
sourceRect, imageRect, drawingParams.mFillRect,
|
|
gfxASurface::ImageFormatARGB32, aFilter);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawSingleUnscaledImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsPoint& aDest,
|
|
const nsRect* aDirty,
|
|
uint32_t aImageFlags,
|
|
const nsRect* aSourceArea)
|
|
{
|
|
nsIntSize imageSize;
|
|
aImage->GetWidth(&imageSize.width);
|
|
aImage->GetHeight(&imageSize.height);
|
|
NS_ENSURE_TRUE(imageSize.width > 0 && imageSize.height > 0, NS_ERROR_FAILURE);
|
|
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
nsSize size(imageSize.width*appUnitsPerCSSPixel,
|
|
imageSize.height*appUnitsPerCSSPixel);
|
|
|
|
nsRect source;
|
|
if (aSourceArea) {
|
|
source = *aSourceArea;
|
|
} else {
|
|
source.SizeTo(size);
|
|
}
|
|
|
|
nsRect dest(aDest - source.TopLeft(), size);
|
|
nsRect fill(aDest, source.Size());
|
|
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
|
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
|
// translation but we don't want to actually tile the image.
|
|
fill.IntersectRect(fill, dest);
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
dest, fill, aDest, aDirty ? *aDirty : dest,
|
|
imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawSingleImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aDirty,
|
|
uint32_t aImageFlags,
|
|
const nsRect* aSourceArea)
|
|
{
|
|
nsIntSize imageSize;
|
|
if (aImage->GetType() == imgIContainer::TYPE_VECTOR) {
|
|
imageSize.width = nsPresContext::AppUnitsToIntCSSPixels(aDest.width);
|
|
imageSize.height = nsPresContext::AppUnitsToIntCSSPixels(aDest.height);
|
|
} else {
|
|
aImage->GetWidth(&imageSize.width);
|
|
aImage->GetHeight(&imageSize.height);
|
|
}
|
|
NS_ENSURE_TRUE(imageSize.width > 0 && imageSize.height > 0, NS_ERROR_FAILURE);
|
|
|
|
nsRect source;
|
|
if (aSourceArea) {
|
|
source = *aSourceArea;
|
|
} else {
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
source.SizeTo(imageSize.width*appUnitsPerCSSPixel,
|
|
imageSize.height*appUnitsPerCSSPixel);
|
|
}
|
|
|
|
nsRect dest = nsLayoutUtils::GetWholeImageDestination(imageSize, source,
|
|
aDest);
|
|
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
|
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
|
// transform but we don't want to actually tile the image.
|
|
nsRect fill;
|
|
fill.IntersectRect(aDest, dest);
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter, dest, fill,
|
|
fill.TopLeft(), aDirty, imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::ComputeSizeForDrawing(imgIContainer *aImage,
|
|
nsIntSize& aImageSize, /*outparam*/
|
|
nsSize& aIntrinsicRatio, /*outparam*/
|
|
bool& aGotWidth, /*outparam*/
|
|
bool& aGotHeight /*outparam*/)
|
|
{
|
|
aGotWidth = NS_SUCCEEDED(aImage->GetWidth(&aImageSize.width));
|
|
aGotHeight = NS_SUCCEEDED(aImage->GetHeight(&aImageSize.height));
|
|
|
|
if (aGotWidth && aGotHeight) {
|
|
aIntrinsicRatio = nsSize(aImageSize.width, aImageSize.height);
|
|
return;
|
|
}
|
|
|
|
// If we failed to get width or height, we either have a vector image and
|
|
// should return its intrinsic ratio, or we hit an error (say, because the
|
|
// image failed to load or couldn't be decoded) and should return zero size.
|
|
if (nsIFrame* rootFrame = aImage->GetRootLayoutFrame()) {
|
|
aIntrinsicRatio = rootFrame->GetIntrinsicRatio();
|
|
} else {
|
|
aGotWidth = aGotHeight = true;
|
|
aImageSize = nsIntSize(0, 0);
|
|
aIntrinsicRatio = nsSize(0, 0);
|
|
}
|
|
}
|
|
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawBackgroundImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
const nsIntSize& aImageSize,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
uint32_t aImageFlags)
|
|
{
|
|
SAMPLE_LABEL("layout", "nsLayoutUtils::DrawBackgroundImage");
|
|
|
|
if (UseBackgroundNearestFiltering()) {
|
|
aGraphicsFilter = gfxPattern::FILTER_NEAREST;
|
|
}
|
|
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
aDest, aFill, aAnchor, aDirty,
|
|
aImageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
uint32_t aImageFlags)
|
|
{
|
|
nsIntSize imageSize;
|
|
nsSize imageRatio;
|
|
bool gotHeight, gotWidth;
|
|
ComputeSizeForDrawing(aImage, imageSize, imageRatio, gotWidth, gotHeight);
|
|
|
|
// XXX Dimensionless images shouldn't fall back to filled-area size -- the
|
|
// caller should provide the image size, a la DrawBackgroundImage.
|
|
if (gotWidth != gotHeight) {
|
|
if (!gotWidth) {
|
|
if (imageRatio.height != 0) {
|
|
imageSize.width =
|
|
NSCoordSaturatingNonnegativeMultiply(imageSize.height,
|
|
float(imageRatio.width) /
|
|
float(imageRatio.height));
|
|
gotWidth = true;
|
|
}
|
|
} else {
|
|
if (imageRatio.width != 0) {
|
|
imageSize.height =
|
|
NSCoordSaturatingNonnegativeMultiply(imageSize.width,
|
|
float(imageRatio.height) /
|
|
float(imageRatio.width));
|
|
gotHeight = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!gotWidth) {
|
|
imageSize.width = nsPresContext::AppUnitsToIntCSSPixels(aFill.width);
|
|
}
|
|
if (!gotHeight) {
|
|
imageSize.height = nsPresContext::AppUnitsToIntCSSPixels(aFill.height);
|
|
}
|
|
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
aDest, aFill, aAnchor, aDirty,
|
|
imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsRect
|
|
nsLayoutUtils::GetWholeImageDestination(const nsIntSize& aWholeImageSize,
|
|
const nsRect& aImageSourceArea,
|
|
const nsRect& aDestArea)
|
|
{
|
|
double scaleX = double(aDestArea.width)/aImageSourceArea.width;
|
|
double scaleY = double(aDestArea.height)/aImageSourceArea.height;
|
|
nscoord destOffsetX = NSToCoordRound(aImageSourceArea.x*scaleX);
|
|
nscoord destOffsetY = NSToCoordRound(aImageSourceArea.y*scaleY);
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
nscoord wholeSizeX = NSToCoordRound(aWholeImageSize.width*appUnitsPerCSSPixel*scaleX);
|
|
nscoord wholeSizeY = NSToCoordRound(aWholeImageSize.height*appUnitsPerCSSPixel*scaleY);
|
|
return nsRect(aDestArea.TopLeft() - nsPoint(destOffsetX, destOffsetY),
|
|
nsSize(wholeSizeX, wholeSizeY));
|
|
}
|
|
|
|
static bool NonZeroStyleCoord(const nsStyleCoord& aCoord)
|
|
{
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
// Since negative results are clamped to 0, check > 0.
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, nscoord_MAX) > 0 ||
|
|
nsRuleNode::ComputeCoordPercentCalc(aCoord, 0) > 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::HasNonZeroCorner(const nsStyleCorners& aCorners)
|
|
{
|
|
NS_FOR_CSS_HALF_CORNERS(corner) {
|
|
if (NonZeroStyleCoord(aCorners.Get(corner)))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// aCorner is a "full corner" value, i.e. NS_CORNER_TOP_LEFT etc
|
|
static bool IsCornerAdjacentToSide(uint8_t aCorner, mozilla::css::Side aSide)
|
|
{
|
|
PR_STATIC_ASSERT((int)NS_SIDE_TOP == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == NS_CORNER_BOTTOM_LEFT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_TOP == ((NS_CORNER_TOP_RIGHT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == ((NS_CORNER_BOTTOM_RIGHT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == ((NS_CORNER_BOTTOM_LEFT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == ((NS_CORNER_TOP_LEFT - 1)&3));
|
|
|
|
return aSide == aCorner || aSide == ((aCorner - 1)&3);
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::HasNonZeroCornerOnSide(const nsStyleCorners& aCorners,
|
|
mozilla::css::Side aSide)
|
|
{
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_X/2 == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_Y/2 == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_X/2 == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_Y/2 == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_X/2 == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_Y/2 == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_X/2 == NS_CORNER_BOTTOM_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_Y/2 == NS_CORNER_BOTTOM_LEFT);
|
|
|
|
NS_FOR_CSS_HALF_CORNERS(corner) {
|
|
// corner is a "half corner" value, so dividing by two gives us a
|
|
// "full corner" value.
|
|
if (NonZeroStyleCoord(aCorners.Get(corner)) &&
|
|
IsCornerAdjacentToSide(corner/2, aSide))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* static */ nsTransparencyMode
|
|
nsLayoutUtils::GetFrameTransparency(nsIFrame* aBackgroundFrame,
|
|
nsIFrame* aCSSRootFrame) {
|
|
if (aCSSRootFrame->GetStyleContext()->GetStyleDisplay()->mOpacity < 1.0f)
|
|
return eTransparencyTransparent;
|
|
|
|
if (HasNonZeroCorner(aCSSRootFrame->GetStyleContext()->GetStyleBorder()->mBorderRadius))
|
|
return eTransparencyTransparent;
|
|
|
|
if (aCSSRootFrame->GetStyleDisplay()->mAppearance == NS_THEME_WIN_GLASS)
|
|
return eTransparencyGlass;
|
|
|
|
if (aCSSRootFrame->GetStyleDisplay()->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS)
|
|
return eTransparencyBorderlessGlass;
|
|
|
|
nsITheme::Transparency transparency;
|
|
if (aCSSRootFrame->IsThemed(&transparency))
|
|
return transparency == nsITheme::eTransparent
|
|
? eTransparencyTransparent
|
|
: eTransparencyOpaque;
|
|
|
|
// We need an uninitialized window to be treated as opaque because
|
|
// doing otherwise breaks window display effects on some platforms,
|
|
// specifically Vista. (bug 450322)
|
|
if (aBackgroundFrame->GetType() == nsGkAtoms::viewportFrame &&
|
|
!aBackgroundFrame->GetFirstPrincipalChild()) {
|
|
return eTransparencyOpaque;
|
|
}
|
|
|
|
nsStyleContext* bgSC;
|
|
if (!nsCSSRendering::FindBackground(aBackgroundFrame->PresContext(),
|
|
aBackgroundFrame, &bgSC)) {
|
|
return eTransparencyTransparent;
|
|
}
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
if (NS_GET_A(bg->mBackgroundColor) < 255 ||
|
|
// bottom layer's clip is used for the color
|
|
bg->BottomLayer().mClip != NS_STYLE_BG_CLIP_BORDER)
|
|
return eTransparencyTransparent;
|
|
return eTransparencyOpaque;
|
|
}
|
|
|
|
static bool IsPopupFrame(nsIFrame* aFrame)
|
|
{
|
|
// aFrame is a popup it's the list control frame dropdown for a combobox.
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
if (frameType == nsGkAtoms::listControlFrame) {
|
|
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(aFrame);
|
|
return lcf->IsInDropDownMode();
|
|
}
|
|
|
|
// ... or if it's a XUL menupopup frame.
|
|
return frameType == nsGkAtoms::menuPopupFrame;
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::IsPopup(nsIFrame* aFrame)
|
|
{
|
|
// Optimization: the frame can't possibly be a popup if it has no view.
|
|
if (!aFrame->HasView()) {
|
|
NS_ASSERTION(!IsPopupFrame(aFrame), "popup frame must have a view");
|
|
return false;
|
|
}
|
|
return IsPopupFrame(aFrame);
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
nsLayoutUtils::GetDisplayRootFrame(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* f = aFrame;
|
|
for (;;) {
|
|
if (IsPopup(f))
|
|
return f;
|
|
nsIFrame* parent = GetCrossDocParentFrame(f);
|
|
if (!parent)
|
|
return f;
|
|
f = parent;
|
|
}
|
|
}
|
|
|
|
/* static */ uint32_t
|
|
nsLayoutUtils::GetTextRunFlagsForStyle(nsStyleContext* aStyleContext,
|
|
const nsStyleFont* aStyleFont,
|
|
nscoord aLetterSpacing)
|
|
{
|
|
uint32_t result = 0;
|
|
if (aLetterSpacing != 0) {
|
|
result |= gfxTextRunFactory::TEXT_DISABLE_OPTIONAL_LIGATURES;
|
|
}
|
|
switch (aStyleContext->GetStyleSVG()->mTextRendering) {
|
|
case NS_STYLE_TEXT_RENDERING_OPTIMIZESPEED:
|
|
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
|
break;
|
|
case NS_STYLE_TEXT_RENDERING_AUTO:
|
|
if (aStyleFont->mFont.size <
|
|
aStyleContext->PresContext()->GetAutoQualityMinFontSize()) {
|
|
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::GetRectDifferenceStrips(const nsRect& aR1, const nsRect& aR2,
|
|
nsRect* aHStrip, nsRect* aVStrip) {
|
|
NS_ASSERTION(aR1.TopLeft() == aR2.TopLeft(),
|
|
"expected rects at the same position");
|
|
nsRect unionRect(aR1.x, aR1.y, NS_MAX(aR1.width, aR2.width),
|
|
NS_MAX(aR1.height, aR2.height));
|
|
nscoord VStripStart = NS_MIN(aR1.width, aR2.width);
|
|
nscoord HStripStart = NS_MIN(aR1.height, aR2.height);
|
|
*aVStrip = unionRect;
|
|
aVStrip->x += VStripStart;
|
|
aVStrip->width -= VStripStart;
|
|
*aHStrip = unionRect;
|
|
aHStrip->y += HStripStart;
|
|
aHStrip->height -= HStripStart;
|
|
}
|
|
|
|
nsDeviceContext*
|
|
nsLayoutUtils::GetDeviceContextForScreenInfo(nsPIDOMWindow* aWindow)
|
|
{
|
|
if (!aWindow) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell();
|
|
while (docShell) {
|
|
// Now make sure our size is up to date. That will mean that the device
|
|
// context does the right thing on multi-monitor systems when we return it to
|
|
// the caller. It will also make sure that our prescontext has been created,
|
|
// if we're supposed to have one.
|
|
nsCOMPtr<nsPIDOMWindow> win = do_GetInterface(docShell);
|
|
if (!win) {
|
|
// No reason to go on
|
|
return nullptr;
|
|
}
|
|
|
|
win->EnsureSizeUpToDate();
|
|
|
|
nsRefPtr<nsPresContext> presContext;
|
|
docShell->GetPresContext(getter_AddRefs(presContext));
|
|
if (presContext) {
|
|
nsDeviceContext* context = presContext->DeviceContext();
|
|
if (context) {
|
|
return context;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShellTreeItem> curItem = do_QueryInterface(docShell);
|
|
nsCOMPtr<nsIDocShellTreeItem> parentItem;
|
|
curItem->GetParent(getter_AddRefs(parentItem));
|
|
docShell = do_QueryInterface(parentItem);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::IsReallyFixedPos(nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame->GetParent(),
|
|
"IsReallyFixedPos called on frame not in tree");
|
|
NS_PRECONDITION(aFrame->GetStyleDisplay()->mPosition ==
|
|
NS_STYLE_POSITION_FIXED,
|
|
"IsReallyFixedPos called on non-'position:fixed' frame");
|
|
|
|
nsIAtom *parentType = aFrame->GetParent()->GetType();
|
|
return parentType == nsGkAtoms::viewportFrame ||
|
|
parentType == nsGkAtoms::pageContentFrame;
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(nsIImageLoadingContent* aElement,
|
|
uint32_t aSurfaceFlags)
|
|
{
|
|
SurfaceFromElementResult result;
|
|
nsresult rv;
|
|
|
|
bool forceCopy = (aSurfaceFlags & SFE_WANT_NEW_SURFACE) != 0;
|
|
bool wantImageSurface = (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) != 0;
|
|
bool premultAlpha = (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA) == 0;
|
|
|
|
if (!premultAlpha) {
|
|
forceCopy = true;
|
|
wantImageSurface = true;
|
|
}
|
|
|
|
// Push a null JSContext on the stack so that code that runs within
|
|
// the below code doesn't think it's being called by JS. See bug
|
|
// 604262.
|
|
nsCxPusher pusher;
|
|
pusher.PushNull();
|
|
|
|
nsCOMPtr<imgIRequest> imgRequest;
|
|
rv = aElement->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(imgRequest));
|
|
if (NS_FAILED(rv) || !imgRequest)
|
|
return result;
|
|
|
|
uint32_t status;
|
|
imgRequest->GetImageStatus(&status);
|
|
if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
|
|
// Spec says to use GetComplete, but that only works on
|
|
// nsIDOMHTMLImageElement, and we support all sorts of other stuff
|
|
// here. Do this for now pending spec clarification.
|
|
result.mIsStillLoading = (status & imgIRequest::STATUS_ERROR) == 0;
|
|
return result;
|
|
}
|
|
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
rv = imgRequest->GetImagePrincipal(getter_AddRefs(principal));
|
|
if (NS_FAILED(rv) || !principal)
|
|
return result;
|
|
|
|
nsCOMPtr<imgIContainer> imgContainer;
|
|
rv = imgRequest->GetImage(getter_AddRefs(imgContainer));
|
|
if (NS_FAILED(rv) || !imgContainer)
|
|
return result;
|
|
|
|
uint32_t whichFrame = (aSurfaceFlags & SFE_WANT_FIRST_FRAME)
|
|
? (uint32_t) imgIContainer::FRAME_FIRST
|
|
: (uint32_t) imgIContainer::FRAME_CURRENT;
|
|
uint32_t frameFlags = imgIContainer::FLAG_SYNC_DECODE;
|
|
if (aSurfaceFlags & SFE_NO_COLORSPACE_CONVERSION)
|
|
frameFlags |= imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION;
|
|
if (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA)
|
|
frameFlags |= imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA;
|
|
nsRefPtr<gfxASurface> framesurf;
|
|
rv = imgContainer->GetFrame(whichFrame,
|
|
frameFlags,
|
|
getter_AddRefs(framesurf));
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
|
|
int32_t imgWidth, imgHeight;
|
|
rv = imgContainer->GetWidth(&imgWidth);
|
|
nsresult rv2 = imgContainer->GetHeight(&imgHeight);
|
|
if (NS_FAILED(rv) || NS_FAILED(rv2))
|
|
return result;
|
|
|
|
if (wantImageSurface && framesurf->GetType() != gfxASurface::SurfaceTypeImage) {
|
|
forceCopy = true;
|
|
}
|
|
|
|
nsRefPtr<gfxASurface> gfxsurf = framesurf;
|
|
if (forceCopy) {
|
|
if (wantImageSurface) {
|
|
gfxsurf = new gfxImageSurface (gfxIntSize(imgWidth, imgHeight), gfxASurface::ImageFormatARGB32);
|
|
} else {
|
|
gfxsurf = gfxPlatform::GetPlatform()->CreateOffscreenSurface(gfxIntSize(imgWidth, imgHeight),
|
|
gfxASurface::CONTENT_COLOR_ALPHA);
|
|
}
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(gfxsurf);
|
|
|
|
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
|
|
ctx->SetSource(framesurf);
|
|
ctx->Paint();
|
|
}
|
|
|
|
int32_t corsmode;
|
|
if (NS_SUCCEEDED(imgRequest->GetCORSMode(&corsmode))) {
|
|
result.mCORSUsed = (corsmode != imgIRequest::CORS_NONE);
|
|
}
|
|
|
|
result.mSurface = gfxsurf;
|
|
result.mSize = gfxIntSize(imgWidth, imgHeight);
|
|
result.mPrincipal = principal.forget();
|
|
// no images, including SVG images, can load content from another domain.
|
|
result.mIsWriteOnly = false;
|
|
result.mImageRequest = imgRequest.forget();
|
|
|
|
return result;
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(nsHTMLImageElement *aElement,
|
|
uint32_t aSurfaceFlags)
|
|
{
|
|
return SurfaceFromElement(static_cast<nsIImageLoadingContent*>(aElement),
|
|
aSurfaceFlags);
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(nsHTMLCanvasElement* aElement,
|
|
uint32_t aSurfaceFlags)
|
|
{
|
|
SurfaceFromElementResult result;
|
|
nsresult rv;
|
|
|
|
bool forceCopy = (aSurfaceFlags & SFE_WANT_NEW_SURFACE) != 0;
|
|
bool wantImageSurface = (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) != 0;
|
|
bool premultAlpha = (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA) == 0;
|
|
|
|
if (!premultAlpha) {
|
|
forceCopy = true;
|
|
wantImageSurface = true;
|
|
}
|
|
|
|
gfxIntSize size = aElement->GetSize();
|
|
|
|
nsRefPtr<gfxASurface> surf;
|
|
|
|
if (!forceCopy && aElement->CountContexts() == 1) {
|
|
nsICanvasRenderingContextInternal *srcCanvas = aElement->GetContextAtIndex(0);
|
|
rv = srcCanvas->GetThebesSurface(getter_AddRefs(surf));
|
|
|
|
if (NS_FAILED(rv))
|
|
surf = nullptr;
|
|
}
|
|
|
|
if (surf && wantImageSurface && surf->GetType() != gfxASurface::SurfaceTypeImage)
|
|
surf = nullptr;
|
|
|
|
if (!surf) {
|
|
if (wantImageSurface) {
|
|
surf = new gfxImageSurface(size, gfxASurface::ImageFormatARGB32);
|
|
} else {
|
|
surf = gfxPlatform::GetPlatform()->CreateOffscreenSurface(size, gfxASurface::CONTENT_COLOR_ALPHA);
|
|
}
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(surf);
|
|
// XXX shouldn't use the external interface, but maybe we can layerify this
|
|
uint32_t flags = premultAlpha ? nsHTMLCanvasElement::RenderFlagPremultAlpha : 0;
|
|
rv = aElement->RenderContextsExternal(ctx, gfxPattern::FILTER_NEAREST, flags);
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
}
|
|
|
|
// Ensure that any future changes to the canvas trigger proper invalidation,
|
|
// in case this is being used by -moz-element()
|
|
aElement->MarkContextClean();
|
|
|
|
result.mSurface = surf;
|
|
result.mSize = size;
|
|
result.mPrincipal = aElement->NodePrincipal();
|
|
result.mIsWriteOnly = aElement->IsWriteOnly();
|
|
|
|
return result;
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(nsHTMLVideoElement* aElement,
|
|
uint32_t aSurfaceFlags)
|
|
{
|
|
SurfaceFromElementResult result;
|
|
|
|
bool wantImageSurface = (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) != 0;
|
|
bool premultAlpha = (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA) == 0;
|
|
|
|
if (!premultAlpha) {
|
|
wantImageSurface = true;
|
|
}
|
|
|
|
uint16_t readyState;
|
|
if (NS_SUCCEEDED(aElement->GetReadyState(&readyState)) &&
|
|
(readyState == nsIDOMHTMLMediaElement::HAVE_NOTHING ||
|
|
readyState == nsIDOMHTMLMediaElement::HAVE_METADATA)) {
|
|
result.mIsStillLoading = true;
|
|
return result;
|
|
}
|
|
|
|
// If it doesn't have a principal, just bail
|
|
nsCOMPtr<nsIPrincipal> principal = aElement->GetCurrentPrincipal();
|
|
if (!principal)
|
|
return result;
|
|
|
|
ImageContainer *container = aElement->GetImageContainer();
|
|
if (!container)
|
|
return result;
|
|
|
|
gfxIntSize size;
|
|
nsRefPtr<gfxASurface> surf = container->GetCurrentAsSurface(&size);
|
|
if (!surf)
|
|
return result;
|
|
|
|
if (wantImageSurface && surf->GetType() != gfxASurface::SurfaceTypeImage) {
|
|
nsRefPtr<gfxImageSurface> imgSurf =
|
|
new gfxImageSurface(size, gfxASurface::ImageFormatARGB32);
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(imgSurf);
|
|
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
|
|
ctx->DrawSurface(surf, size);
|
|
surf = imgSurf;
|
|
}
|
|
|
|
result.mCORSUsed = aElement->GetCORSMode() != CORS_NONE;
|
|
result.mSurface = surf;
|
|
result.mSize = size;
|
|
result.mPrincipal = principal.forget();
|
|
result.mIsWriteOnly = false;
|
|
|
|
return result;
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(dom::Element* aElement,
|
|
uint32_t aSurfaceFlags)
|
|
{
|
|
// If it's a <canvas>, we may be able to just grab its internal surface
|
|
if (nsHTMLCanvasElement* canvas = nsHTMLCanvasElement::FromContent(aElement)) {
|
|
return SurfaceFromElement(canvas, aSurfaceFlags);
|
|
}
|
|
|
|
#ifdef MOZ_MEDIA
|
|
// Maybe it's <video>?
|
|
if (nsHTMLVideoElement* video = nsHTMLVideoElement::FromContent(aElement)) {
|
|
return SurfaceFromElement(video, aSurfaceFlags);
|
|
}
|
|
#endif
|
|
|
|
// Finally, check if it's a normal image
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aElement);
|
|
|
|
if (!imageLoader) {
|
|
return SurfaceFromElementResult();
|
|
}
|
|
|
|
return SurfaceFromElement(imageLoader, aSurfaceFlags);
|
|
}
|
|
|
|
/* static */
|
|
nsIContent*
|
|
nsLayoutUtils::GetEditableRootContentByContentEditable(nsIDocument* aDocument)
|
|
{
|
|
// If the document is in designMode we should return NULL.
|
|
if (!aDocument || aDocument->HasFlag(NODE_IS_EDITABLE)) {
|
|
return nullptr;
|
|
}
|
|
|
|
// contenteditable only works with HTML document.
|
|
// Note: Use nsIDOMHTMLDocument rather than nsIHTMLDocument for getting the
|
|
// body node because nsIDOMHTMLDocument::GetBody() does something
|
|
// additional work for some cases and nsEditor uses them.
|
|
nsCOMPtr<nsIDOMHTMLDocument> domHTMLDoc = do_QueryInterface(aDocument);
|
|
if (!domHTMLDoc) {
|
|
return nullptr;
|
|
}
|
|
|
|
Element* rootElement = aDocument->GetRootElement();
|
|
if (rootElement && rootElement->IsEditable()) {
|
|
return rootElement;
|
|
}
|
|
|
|
// If there are no editable root element, check its <body> element.
|
|
// Note that the body element could be <frameset> element.
|
|
nsCOMPtr<nsIDOMHTMLElement> body;
|
|
nsresult rv = domHTMLDoc->GetBody(getter_AddRefs(body));
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(body);
|
|
if (NS_SUCCEEDED(rv) && content && content->IsEditable()) {
|
|
return content;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* static */ void
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(nsIFrame* aContainer,
|
|
const nsFrameList& aFrameList)
|
|
{
|
|
for (nsIFrame* f = aFrameList.FirstChild(); f ; f = f->GetNextSibling()) {
|
|
// Check only later continuations of f; we deal with checking the
|
|
// earlier continuations when we hit those earlier continuations in
|
|
// the frame list.
|
|
for (nsIFrame *c = f; (c = c->GetNextInFlow());) {
|
|
NS_ASSERTION(c->GetParent() != aContainer ||
|
|
!aFrameList.ContainsFrame(c),
|
|
"Two continuations of the same frame in the same "
|
|
"frame list");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Is one of aFrame's ancestors a letter frame?
|
|
static bool
|
|
IsInLetterFrame(nsIFrame *aFrame)
|
|
{
|
|
for (nsIFrame *f = aFrame->GetParent(); f; f = f->GetParent()) {
|
|
if (f->GetType() == nsGkAtoms::letterFrame) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(nsIFrame *aSubtreeRoot)
|
|
{
|
|
NS_ASSERTION(aSubtreeRoot->GetPrevInFlow(),
|
|
"frame tree not empty, but caller reported complete status");
|
|
|
|
// Also assert that text frames map no text.
|
|
int32_t start, end;
|
|
nsresult rv = aSubtreeRoot->GetOffsets(start, end);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "GetOffsets failed");
|
|
// In some cases involving :first-letter, we'll partially unlink a
|
|
// continuation in the middle of a continuation chain from its
|
|
// previous and next continuations before destroying it, presumably so
|
|
// that we don't also destroy the later continuations. Once we've
|
|
// done this, GetOffsets returns incorrect values.
|
|
// For examples, see list of tests in
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=619021#c29
|
|
NS_ASSERTION(start == end || IsInLetterFrame(aSubtreeRoot),
|
|
"frame tree not empty, but caller reported complete status");
|
|
|
|
nsIFrame::ChildListIterator lists(aSubtreeRoot);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(childFrames.get());
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* static */
|
|
nsresult
|
|
nsLayoutUtils::GetFontFacesForFrames(nsIFrame* aFrame,
|
|
nsFontFaceList* aFontFaceList)
|
|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
|
|
|
if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
|
return GetFontFacesForText(aFrame, 0, PR_INT32_MAX, false,
|
|
aFontFaceList);
|
|
}
|
|
|
|
while (aFrame) {
|
|
nsIFrame::ChildListID childLists[] = { nsIFrame::kPrincipalList,
|
|
nsIFrame::kPopupList };
|
|
for (size_t i = 0; i < ArrayLength(childLists); ++i) {
|
|
nsFrameList children(aFrame->GetChildList(childLists[i]));
|
|
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* child = e.get();
|
|
if (child->GetPrevContinuation()) {
|
|
continue;
|
|
}
|
|
child = nsPlaceholderFrame::GetRealFrameFor(child);
|
|
nsresult rv = GetFontFacesForFrames(child, aFontFaceList);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
aFrame = GetNextContinuationOrSpecialSibling(aFrame);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
nsresult
|
|
nsLayoutUtils::GetFontFacesForText(nsIFrame* aFrame,
|
|
int32_t aStartOffset, int32_t aEndOffset,
|
|
bool aFollowContinuations,
|
|
nsFontFaceList* aFontFaceList)
|
|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
|
|
|
if (aFrame->GetType() != nsGkAtoms::textFrame) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsTextFrame* curr = static_cast<nsTextFrame*>(aFrame);
|
|
do {
|
|
int32_t fstart = NS_MAX(curr->GetContentOffset(), aStartOffset);
|
|
int32_t fend = NS_MIN(curr->GetContentEnd(), aEndOffset);
|
|
if (fstart >= fend) {
|
|
continue;
|
|
}
|
|
|
|
// overlapping with the offset we want
|
|
gfxSkipCharsIterator iter = curr->EnsureTextRun(nsTextFrame::eInflated);
|
|
gfxTextRun* textRun = curr->GetTextRun(nsTextFrame::eInflated);
|
|
NS_ENSURE_TRUE(textRun, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
uint32_t skipStart = iter.ConvertOriginalToSkipped(fstart);
|
|
uint32_t skipEnd = iter.ConvertOriginalToSkipped(fend);
|
|
aFontFaceList->AddFontsFromTextRun(textRun,
|
|
skipStart,
|
|
skipEnd - skipStart,
|
|
curr);
|
|
} while (aFollowContinuations &&
|
|
(curr = static_cast<nsTextFrame*>(curr->GetNextContinuation())));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
size_t
|
|
nsLayoutUtils::SizeOfTextRunsForFrames(nsIFrame* aFrame,
|
|
nsMallocSizeOfFun aMallocSizeOf,
|
|
bool clear)
|
|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
|
|
|
size_t total = 0;
|
|
|
|
if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
|
nsTextFrame* textFrame = static_cast<nsTextFrame*>(aFrame);
|
|
for (uint32_t i = 0; i < 2; ++i) {
|
|
gfxTextRun *run = textFrame->GetTextRun(
|
|
(i != 0) ? nsTextFrame::eInflated : nsTextFrame::eNotInflated);
|
|
if (run) {
|
|
if (clear) {
|
|
run->ResetSizeOfAccountingFlags();
|
|
} else {
|
|
total += run->MaybeSizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame::ChildList,4> childListArray;
|
|
aFrame->GetChildLists(&childListArray);
|
|
|
|
for (nsIFrame::ChildListArrayIterator childLists(childListArray);
|
|
!childLists.IsDone(); childLists.Next()) {
|
|
for (nsFrameList::Enumerator e(childLists.CurrentList());
|
|
!e.AtEnd(); e.Next()) {
|
|
total += SizeOfTextRunsForFrames(e.get(), aMallocSizeOf, clear);
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::Initialize()
|
|
{
|
|
mozilla::Preferences::AddUintVarCache(&sFontSizeInflationEmPerLine,
|
|
"font.size.inflation.emPerLine");
|
|
mozilla::Preferences::AddUintVarCache(&sFontSizeInflationMinTwips,
|
|
"font.size.inflation.minTwips");
|
|
mozilla::Preferences::AddUintVarCache(&sFontSizeInflationLineThreshold,
|
|
"font.size.inflation.lineThreshold");
|
|
mozilla::Preferences::AddIntVarCache(&sFontSizeInflationMappingIntercept,
|
|
"font.size.inflation.mappingIntercept");
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::Shutdown()
|
|
{
|
|
if (sContentMap) {
|
|
delete sContentMap;
|
|
sContentMap = NULL;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::RegisterImageRequest(nsPresContext* aPresContext,
|
|
imgIRequest* aRequest,
|
|
bool* aRequestRegistered)
|
|
{
|
|
if (!aPresContext) {
|
|
return;
|
|
}
|
|
|
|
if (aRequestRegistered && *aRequestRegistered) {
|
|
// Our request is already registered with the refresh driver, so
|
|
// no need to register it again.
|
|
return;
|
|
}
|
|
|
|
if (aRequest) {
|
|
if (!aPresContext->RefreshDriver()->AddImageRequest(aRequest)) {
|
|
NS_WARNING("Unable to add image request");
|
|
return;
|
|
}
|
|
|
|
if (aRequestRegistered) {
|
|
*aRequestRegistered = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::RegisterImageRequestIfAnimated(nsPresContext* aPresContext,
|
|
imgIRequest* aRequest,
|
|
bool* aRequestRegistered)
|
|
{
|
|
if (!aPresContext) {
|
|
return;
|
|
}
|
|
|
|
if (aRequestRegistered && *aRequestRegistered) {
|
|
// Our request is already registered with the refresh driver, so
|
|
// no need to register it again.
|
|
return;
|
|
}
|
|
|
|
if (aRequest) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
aRequest->GetImage(getter_AddRefs(image));
|
|
if (image) {
|
|
|
|
// Check to verify that the image is animated. If so, then add it to the
|
|
// list of images tracked by the refresh driver.
|
|
bool isAnimated = false;
|
|
nsresult rv = image->GetAnimated(&isAnimated);
|
|
if (NS_SUCCEEDED(rv) && isAnimated) {
|
|
if (!aPresContext->RefreshDriver()->AddImageRequest(aRequest)) {
|
|
NS_WARNING("Unable to add image request");
|
|
return;
|
|
}
|
|
|
|
if (aRequestRegistered) {
|
|
*aRequestRegistered = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::DeregisterImageRequest(nsPresContext* aPresContext,
|
|
imgIRequest* aRequest,
|
|
bool* aRequestRegistered)
|
|
{
|
|
if (!aPresContext) {
|
|
return;
|
|
}
|
|
|
|
// Deregister our imgIRequest with the refresh driver to
|
|
// complete tear-down, but only if it has been registered
|
|
if (aRequestRegistered && !*aRequestRegistered) {
|
|
return;
|
|
}
|
|
|
|
if (aRequest) {
|
|
nsCOMPtr<imgIContainer> image;
|
|
aRequest->GetImage(getter_AddRefs(image));
|
|
if (image) {
|
|
aPresContext->RefreshDriver()->RemoveImageRequest(aRequest);
|
|
|
|
if (aRequestRegistered) {
|
|
*aRequestRegistered = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::PostRestyleEvent(Element* aElement,
|
|
nsRestyleHint aRestyleHint,
|
|
nsChangeHint aMinChangeHint)
|
|
{
|
|
nsIDocument* doc = aElement->GetCurrentDoc();
|
|
if (doc) {
|
|
nsCOMPtr<nsIPresShell> presShell = doc->GetShell();
|
|
if (presShell) {
|
|
presShell->FrameConstructor()->PostRestyleEvent(
|
|
aElement, aRestyleHint, aMinChangeHint);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
|
const nsAString& aValue)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName),
|
|
mValue(aValue)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
}
|
|
|
|
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
|
int32_t aValue)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
mValue.AppendInt(aValue);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSetAttrRunnable::Run()
|
|
{
|
|
return mContent->SetAttr(kNameSpaceID_None, mAttrName, mValue, true);
|
|
}
|
|
|
|
nsUnsetAttrRunnable::nsUnsetAttrRunnable(nsIContent* aContent,
|
|
nsIAtom* aAttrName)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsUnsetAttrRunnable::Run()
|
|
{
|
|
return mContent->UnsetAttr(kNameSpaceID_None, mAttrName, true);
|
|
}
|
|
|
|
nsReflowFrameRunnable::nsReflowFrameRunnable(nsIFrame* aFrame,
|
|
nsIPresShell::IntrinsicDirty aIntrinsicDirty,
|
|
nsFrameState aBitToAdd)
|
|
: mWeakFrame(aFrame),
|
|
mIntrinsicDirty(aIntrinsicDirty),
|
|
mBitToAdd(aBitToAdd)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsReflowFrameRunnable::Run()
|
|
{
|
|
if (mWeakFrame.IsAlive()) {
|
|
mWeakFrame->PresContext()->PresShell()->
|
|
FrameNeedsReflow(mWeakFrame, mIntrinsicDirty, mBitToAdd);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Compute the minimum font size inside of a container with the given
|
|
* width, such that **when the user zooms the container to fill the full
|
|
* width of the device**, the fonts satisfy our minima.
|
|
*/
|
|
static nscoord
|
|
MinimumFontSizeFor(nsPresContext* aPresContext, nscoord aContainerWidth)
|
|
{
|
|
nsIPresShell* presShell = aPresContext->PresShell();
|
|
|
|
uint32_t emPerLine = presShell->FontSizeInflationEmPerLine();
|
|
uint32_t minTwips = presShell->FontSizeInflationMinTwips();
|
|
if (emPerLine == 0 && minTwips == 0) {
|
|
return 0;
|
|
}
|
|
|
|
// Clamp the container width to the device dimensions
|
|
nscoord iFrameWidth = aPresContext->GetVisibleArea().width;
|
|
nscoord effectiveContainerWidth = NS_MIN(iFrameWidth, aContainerWidth);
|
|
|
|
nscoord byLine = 0, byInch = 0;
|
|
if (emPerLine != 0) {
|
|
byLine = effectiveContainerWidth / emPerLine;
|
|
}
|
|
if (minTwips != 0) {
|
|
// REVIEW: Is this giving us app units and sizes *not* counting
|
|
// viewport scaling?
|
|
float deviceWidthInches =
|
|
aPresContext->ScreenWidthInchesForFontInflation();
|
|
byInch = NSToCoordRound(effectiveContainerWidth /
|
|
(deviceWidthInches * 1440 /
|
|
minTwips ));
|
|
}
|
|
return NS_MAX(byLine, byInch);
|
|
}
|
|
|
|
/* static */ float
|
|
nsLayoutUtils::FontSizeInflationInner(const nsIFrame *aFrame,
|
|
nscoord aMinFontSize)
|
|
{
|
|
// Note that line heights should be inflated by the same ratio as the
|
|
// font size of the same text; thus we operate only on the font size
|
|
// even when we're scaling a line height.
|
|
nscoord styleFontSize = aFrame->GetStyleFont()->mFont.size;
|
|
if (styleFontSize <= 0) {
|
|
// Never scale zero font size.
|
|
return 1.0;
|
|
}
|
|
|
|
if (aMinFontSize <= 0) {
|
|
// No need to scale.
|
|
return 1.0;
|
|
}
|
|
|
|
// If between this current frame and its font inflation container there is a
|
|
// non-inline element with fixed width or height, then we should not inflate
|
|
// fonts for this frame.
|
|
for (const nsIFrame* f = aFrame;
|
|
f && !IsContainerForFontSizeInflation(f);
|
|
f = f->GetParent()) {
|
|
nsIContent* content = f->GetContent();
|
|
nsIAtom* fType = f->GetType();
|
|
// Also, if there is more than one frame corresponding to a single
|
|
// content node, we want the outermost one.
|
|
if (!(f->GetParent() && f->GetParent()->GetContent() == content) &&
|
|
// ignore width/height on inlines since they don't apply
|
|
fType != nsGkAtoms::inlineFrame &&
|
|
// ignore width on radios and checkboxes since we enlarge them and
|
|
// they have width/height in ua.css
|
|
fType != nsGkAtoms::formControlFrame) {
|
|
nsStyleCoord stylePosWidth = f->GetStylePosition()->mWidth;
|
|
nsStyleCoord stylePosHeight = f->GetStylePosition()->mHeight;
|
|
if (stylePosWidth.GetUnit() != eStyleUnit_Auto ||
|
|
stylePosHeight.GetUnit() != eStyleUnit_Auto) {
|
|
|
|
return 1.0;
|
|
}
|
|
}
|
|
}
|
|
|
|
int32_t interceptParam = nsLayoutUtils::FontSizeInflationMappingIntercept();
|
|
|
|
float ratio = float(styleFontSize) / float(aMinFontSize);
|
|
|
|
// Given a minimum inflated font size m, a specified font size s, we want to
|
|
// find the inflated font size i and then return the ratio of i to s (i/s).
|
|
if (interceptParam >= 0) {
|
|
// Since the mapping intercept parameter P is greater than zero, we use it
|
|
// to determine the point where our mapping function intersects the i=s
|
|
// line. This means that we have an equation of the form:
|
|
//
|
|
// i = m + s·(P/2)/(1 + P/2), if s <= (1 + P/2)·m
|
|
// i = s, if s >= (1 + P/2)·m
|
|
|
|
float intercept = 1 + float(interceptParam)/2.0f;
|
|
if (ratio >= intercept) {
|
|
// If we're already at 1+P/2 or more times the minimum, don't scale.
|
|
return 1.0;
|
|
}
|
|
|
|
// The point (intercept, intercept) is where the part of the i vs. s graph
|
|
// that's not slope 1 meets the i=s line. (This part of the
|
|
// graph is a line from (0, m), to that point). We calculate the
|
|
// intersection point to be ((1+P/2)m, (1+P/2)m), where P is the
|
|
// intercept parameter above. We then need to return i/s.
|
|
return (1.0f + (ratio * (intercept - 1) / intercept)) / ratio;
|
|
} else {
|
|
// This is the case where P is negative. We essentially want to implement
|
|
// the case for P=infinity here, so we make i = s + m, which means that
|
|
// i/s = s/s + m/s = 1 + 1/ratio
|
|
return 1 + 1.0f / ratio;
|
|
}
|
|
}
|
|
|
|
static bool
|
|
ShouldInflateFontsForContainer(const nsIFrame *aFrame)
|
|
{
|
|
// We only want to inflate fonts for text that is in a place
|
|
// with room to expand. The question is what the best heuristic for
|
|
// that is...
|
|
// For now, we're going to use NS_FRAME_IN_CONSTRAINED_HEIGHT, which
|
|
// indicates whether the frame is inside something with a constrained
|
|
// height (propagating down the tree), but the propagation stops when
|
|
// we hit overflow-y: scroll or auto.
|
|
const nsStyleText* styleText = aFrame->GetStyleText();
|
|
|
|
return styleText->mTextSizeAdjust != NS_STYLE_TEXT_SIZE_ADJUST_NONE &&
|
|
!(aFrame->GetStateBits() & NS_FRAME_IN_CONSTRAINED_HEIGHT) &&
|
|
// We also want to disable font inflation for containers that have
|
|
// preformatted text.
|
|
styleText->WhiteSpaceCanWrap();
|
|
}
|
|
|
|
nscoord
|
|
nsLayoutUtils::InflationMinFontSizeFor(const nsIFrame *aFrame)
|
|
{
|
|
nsPresContext *presContext = aFrame->PresContext();
|
|
if (!FontSizeInflationEnabled(presContext) ||
|
|
presContext->mInflationDisabledForShrinkWrap) {
|
|
return 0;
|
|
}
|
|
|
|
for (const nsIFrame *f = aFrame; f; f = f->GetParent()) {
|
|
if (IsContainerForFontSizeInflation(f)) {
|
|
if (!ShouldInflateFontsForContainer(f)) {
|
|
return 0;
|
|
}
|
|
|
|
nsFontInflationData *data =
|
|
nsFontInflationData::FindFontInflationDataFor(aFrame);
|
|
// FIXME: The need to null-check here is sort of a bug, and might
|
|
// lead to incorrect results.
|
|
if (!data || !data->InflationEnabled()) {
|
|
return 0;
|
|
}
|
|
|
|
return MinimumFontSizeFor(aFrame->PresContext(),
|
|
data->EffectiveWidth());
|
|
}
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(false, "root should always be container");
|
|
|
|
return 0;
|
|
}
|
|
|
|
float
|
|
nsLayoutUtils::FontSizeInflationFor(const nsIFrame *aFrame)
|
|
{
|
|
if (!FontSizeInflationEnabled(aFrame->PresContext())) {
|
|
return 1.0;
|
|
}
|
|
|
|
return FontSizeInflationInner(aFrame, InflationMinFontSizeFor(aFrame));
|
|
}
|
|
|
|
/* static */ bool
|
|
nsLayoutUtils::FontSizeInflationEnabled(nsPresContext *aPresContext)
|
|
{
|
|
nsIPresShell* presShell = aPresContext->GetPresShell();
|
|
|
|
if (!presShell ||
|
|
(presShell->FontSizeInflationEmPerLine() == 0 &&
|
|
presShell->FontSizeInflationMinTwips() == 0) ||
|
|
aPresContext->IsChrome()) {
|
|
return false;
|
|
}
|
|
|
|
ViewportInfo vInf =
|
|
nsContentUtils::GetViewportInfo(aPresContext->PresShell()->GetDocument());
|
|
|
|
if (vInf.defaultZoom >= 1.0 || vInf.autoSize) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|