forked from mirrors/gecko-dev
9db2aa0440
This fixes it since we honor the print resolution properly now. Differential Revision: https://phabricator.services.mozilla.com/D115263
2726 lines
92 KiB
C++
2726 lines
92 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/* a presentation of a document, part 1 */
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#include "nsPresContext.h"
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#include "nsPresContextInlines.h"
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#include "mozilla/ArrayUtils.h"
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#if defined(MOZ_WIDGET_ANDROID)
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# include "mozilla/AsyncEventDispatcher.h"
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#endif
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#include "mozilla/CycleCollectedJSContext.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/Encoding.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/PresShellInlines.h"
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#include "mozilla/dom/ContentParent.h"
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#include "base/basictypes.h"
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#include "nsCOMPtr.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsDocShell.h"
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#include "nsIContentViewer.h"
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#include "nsPIDOMWindow.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/MediaFeatureChange.h"
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#include "nsIContent.h"
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#include "nsIFrame.h"
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#include "mozilla/dom/BrowsingContext.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/DocumentInlines.h"
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#include "nsIPrintSettings.h"
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#include "nsLanguageAtomService.h"
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#include "mozilla/LookAndFeel.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsHTMLDocument.h"
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#include "nsIWeakReferenceUtils.h"
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#include "nsThreadUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsViewManager.h"
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#include "mozilla/RestyleManager.h"
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#include "SurfaceCacheUtils.h"
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#include "gfxPlatform.h"
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#include "nsFontFaceLoader.h"
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#include "mozilla/AnimationEventDispatcher.h"
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#include "mozilla/EffectCompositor.h"
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#include "mozilla/EventListenerManager.h"
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#include "prenv.h"
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#include "nsTransitionManager.h"
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#include "nsAnimationManager.h"
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#include "CounterStyleManager.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/dom/Element.h"
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#include "nsIMessageManager.h"
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#include "mozilla/dom/HTMLBodyElement.h"
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#include "mozilla/dom/MediaQueryList.h"
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#include "mozilla/SMILAnimationController.h"
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#include "mozilla/css/ImageLoader.h"
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#include "mozilla/dom/PBrowserParent.h"
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#include "mozilla/dom/BrowserChild.h"
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#include "mozilla/dom/BrowserParent.h"
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#include "mozilla/StaticPresData.h"
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#include "nsRefreshDriver.h"
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#include "Layers.h"
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#include "LayerUserData.h"
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#include "ClientLayerManager.h"
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#include "mozilla/dom/NotifyPaintEvent.h"
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#include "nsFrameLoader.h"
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#include "nsContentUtils.h"
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#include "nsPIWindowRoot.h"
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#include "mozilla/Preferences.h"
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#include "gfxTextRun.h"
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#include "nsFontFaceUtils.h"
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#include "mozilla/GlobalStyleSheetCache.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/StaticPrefs_layout.h"
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#include "mozilla/StaticPrefs_zoom.h"
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#include "mozilla/StyleSheet.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/dom/Performance.h"
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#include "mozilla/dom/PerformanceTiming.h"
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#include "mozilla/dom/PerformancePaintTiming.h"
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#include "mozilla/layers/APZThreadUtils.h"
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#include "MobileViewportManager.h"
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#include "mozilla/dom/ImageTracker.h"
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// Needed for Start/Stop of Image Animation
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#include "imgIContainer.h"
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#include "nsIImageLoadingContent.h"
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#include "nsBidiUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsBidi.h"
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#include "mozilla/dom/URL.h"
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#include "mozilla/ServoCSSParser.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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using namespace mozilla::layers;
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uint8_t gNotifySubDocInvalidationData;
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/**
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* Layer UserData for ContainerLayers that want to be notified
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* of local invalidations of them and their descendant layers.
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* Pass a callback to ComputeDifferences to have these called.
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*/
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class ContainerLayerPresContext : public LayerUserData {
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public:
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nsPresContext* mPresContext;
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};
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bool nsPresContext::IsDOMPaintEventPending() {
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if (!mTransactions.IsEmpty()) {
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return true;
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}
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nsRootPresContext* drpc = GetRootPresContext();
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if (drpc && drpc->mRefreshDriver->ViewManagerFlushIsPending()) {
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// Since we're promising that there will be a MozAfterPaint event
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// fired, we record an empty invalidation in case display list
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// invalidation doesn't invalidate anything further.
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NotifyInvalidation(drpc->mRefreshDriver->LastTransactionId().Next(),
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nsRect(0, 0, 0, 0));
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return true;
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}
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return false;
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}
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void nsPresContext::ForceReflowForFontInfoUpdate() {
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// Flush the device context's font cache, so that we won't risk getting
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// stale nsFontMetrics objects from it.
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DeviceContext()->FlushFontCache();
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// If there's a user font set, discard any src:local() faces it may have
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// loaded because their font entries may no longer be valid.
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if (Document()->GetFonts()) {
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Document()->GetFonts()->GetUserFontSet()->ForgetLocalFaces();
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}
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// We can trigger reflow by pretending a font.* preference has changed;
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// this is the same mechanism as gfxPlatform::ForceGlobalReflow() uses
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// if new fonts are installed during the session, for example.
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PreferenceChanged("font.internaluseonly.changed");
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}
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static bool IsVisualCharset(NotNull<const Encoding*> aCharset) {
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return aCharset == ISO_8859_8_ENCODING;
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}
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nsPresContext::nsPresContext(dom::Document* aDocument, nsPresContextType aType)
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: mPresShell(nullptr),
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mDocument(aDocument),
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mMedium(aType == eContext_Galley ? nsGkAtoms::screen : nsGkAtoms::print),
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mSystemFontScale(1.0),
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mTextZoom(1.0),
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mEffectiveTextZoom(1.0),
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mFullZoom(1.0),
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mLastFontInflationScreenSize(gfxSize(-1.0, -1.0)),
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mCurAppUnitsPerDevPixel(0),
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mAutoQualityMinFontSizePixelsPref(0),
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mDynamicToolbarMaxHeight(0),
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mDynamicToolbarHeight(0),
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mPageSize(-1, -1),
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mPageScale(0.0),
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mPPScale(1.0f),
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mViewportScrollOverrideElement(nullptr),
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mElementsRestyled(0),
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mFramesConstructed(0),
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mFramesReflowed(0),
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mChangeHintForPrefChange(nsChangeHint(0)),
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mInterruptChecksToSkip(0),
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mNextFrameRateMultiplier(0),
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mViewportScrollStyles(StyleOverflow::Auto, StyleOverflow::Auto),
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// mImageAnimationMode is initialised below, in constructor body
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mImageAnimationModePref(imgIContainer::kNormalAnimMode),
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mType(aType),
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mInflationDisabledForShrinkWrap(false),
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mInteractionTimeEnabled(true),
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mHasPendingInterrupt(false),
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mHasEverBuiltInvisibleText(false),
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mPendingInterruptFromTest(false),
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mInterruptsEnabled(false),
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mSendAfterPaintToContent(false),
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mDrawImageBackground(true), // always draw the background
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mDrawColorBackground(true),
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// mNeverAnimate is initialised below, in constructor body
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mPaginated(aType != eContext_Galley),
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mCanPaginatedScroll(false),
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mDoScaledTwips(true),
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mIsRootPaginatedDocument(false),
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mPrefBidiDirection(false),
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mPrefScrollbarSide(0),
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mPendingThemeChanged(false),
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mPendingThemeChangeKind(0),
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mPendingUIResolutionChanged(false),
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mPostedPrefChangedRunnable(false),
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mIsGlyph(false),
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mUsesExChUnits(false),
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mCounterStylesDirty(true),
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mFontFeatureValuesDirty(true),
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mSuppressResizeReflow(false),
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mIsVisual(false),
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mPaintFlashing(false),
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mPaintFlashingInitialized(false),
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mHasWarnedAboutPositionedTableParts(false),
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mHasWarnedAboutTooLargeDashedOrDottedRadius(false),
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mQuirkSheetAdded(false),
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mHadNonBlankPaint(false),
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mHadContentfulPaint(false),
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mHadNonTickContentfulPaint(false),
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mHadContentfulPaintComposite(false)
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#ifdef DEBUG
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,
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mInitialized(false)
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#endif
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{
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#ifdef DEBUG
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PodZero(&mLayoutPhaseCount);
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#endif
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if (!IsDynamic()) {
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mImageAnimationMode = imgIContainer::kDontAnimMode;
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mNeverAnimate = true;
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} else {
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mImageAnimationMode = imgIContainer::kNormalAnimMode;
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mNeverAnimate = false;
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}
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NS_ASSERTION(mDocument, "Null document");
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// if text perf logging enabled, init stats struct
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if (MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_textperf), LogLevel::Warning)) {
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mTextPerf = MakeUnique<gfxTextPerfMetrics>();
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}
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if (Preferences::GetBool(GFX_MISSING_FONTS_NOTIFY_PREF)) {
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mMissingFonts = MakeUnique<gfxMissingFontRecorder>();
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}
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// TODO: check whether this is too expensive to do for all pages;
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// maybe we could throttle and only collect stats on 1% of page-loads,
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// or something like that.
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mFontStats = MakeUnique<FontMatchingStats>();
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if (StaticPrefs::layout_dynamic_toolbar_max_height() > 0) {
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// The pref for dynamic toolbar max height is only used in reftests so it's
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// fine to set here.
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mDynamicToolbarMaxHeight = StaticPrefs::layout_dynamic_toolbar_max_height();
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}
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}
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static const char* gExactCallbackPrefs[] = {
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"browser.underline_anchors",
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"browser.anchor_color",
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"browser.active_color",
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"browser.visited_color",
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"image.animation_mode",
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"dom.send_after_paint_to_content",
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"layout.css.dpi",
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"layout.css.devPixelsPerPx",
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"nglayout.debug.paint_flashing",
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"nglayout.debug.paint_flashing_chrome",
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"intl.accept_languages",
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"dom.meta-viewport.enabled",
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nullptr,
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};
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static const char* gPrefixCallbackPrefs[] = {
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"font.", "browser.display.", "browser.viewport.",
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"bidi.", "gfx.font_rendering.", nullptr,
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};
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void nsPresContext::Destroy() {
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if (mEventManager) {
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// unclear if these are needed, but can't hurt
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mEventManager->NotifyDestroyPresContext(this);
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mEventManager->SetPresContext(nullptr);
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mEventManager = nullptr;
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}
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// Unregister preference callbacks
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Preferences::UnregisterPrefixCallbacks(nsPresContext::PreferenceChanged,
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gPrefixCallbackPrefs, this);
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Preferences::UnregisterCallbacks(nsPresContext::PreferenceChanged,
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gExactCallbackPrefs, this);
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mRefreshDriver = nullptr;
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MOZ_ASSERT(mManagedPostRefreshObservers.IsEmpty());
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}
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nsPresContext::~nsPresContext() {
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MOZ_ASSERT(!mPresShell, "Presshell forgot to clear our mPresShell pointer");
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DetachPresShell();
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Destroy();
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}
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPresContext)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPresContext)
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(nsPresContext, LastRelease())
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void nsPresContext::LastRelease() {
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if (mMissingFonts) {
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mMissingFonts->Clear();
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}
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsPresContext)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsPresContext)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnimationEventDispatcher);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument);
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// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mDeviceContext); // not xpcom
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEffectCompositor);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventManager);
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// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mLanguage); // an atom
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// NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTheme); // a service
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrintSettings);
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsPresContext)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mAnimationEventDispatcher);
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument);
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mDeviceContext); // worth bothering?
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mEffectCompositor);
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// NS_RELEASE(tmp->mLanguage); // an atom
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// NS_IMPL_CYCLE_COLLECTION_UNLINK(mTheme); // a service
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mPrintSettings);
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NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_PTR
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tmp->Destroy();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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// Set to true when LookAndFeelChanged needs to be called. This is used
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// because the look and feel is a service, so there's no need to notify it from
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// more than one prescontext.
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static bool sLookAndFeelChanged;
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// Set to true when ThemeChanged needs to be called on mTheme. This is used
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// because mTheme is a service, so there's no need to notify it from more than
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// one prescontext.
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static bool sThemeChanged;
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bool nsPresContext::IsChrome() const {
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return Document()->IsInChromeDocShell();
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}
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void nsPresContext::GetUserPreferences() {
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if (!GetPresShell()) {
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// No presshell means nothing to do here. We'll do this when we
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// get a presshell.
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return;
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}
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mAutoQualityMinFontSizePixelsPref =
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Preferences::GetInt("browser.display.auto_quality_min_font_size");
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PreferenceSheet::EnsureInitialized();
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mSendAfterPaintToContent = Preferences::GetBool(
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"dom.send_after_paint_to_content", mSendAfterPaintToContent);
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mPrefScrollbarSide = Preferences::GetInt("layout.scrollbar.side");
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Document()->SetMayNeedFontPrefsUpdate();
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// * image animation
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nsAutoCString animatePref;
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Preferences::GetCString("image.animation_mode", animatePref);
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if (animatePref.EqualsLiteral("normal"))
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mImageAnimationModePref = imgIContainer::kNormalAnimMode;
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else if (animatePref.EqualsLiteral("none"))
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mImageAnimationModePref = imgIContainer::kDontAnimMode;
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else if (animatePref.EqualsLiteral("once"))
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mImageAnimationModePref = imgIContainer::kLoopOnceAnimMode;
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else // dynamic change to invalid value should act like it does initially
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mImageAnimationModePref = imgIContainer::kNormalAnimMode;
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uint32_t bidiOptions = GetBidi();
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int32_t prefInt = Preferences::GetInt(IBMBIDI_TEXTDIRECTION_STR,
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GET_BIDI_OPTION_DIRECTION(bidiOptions));
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SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt);
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mPrefBidiDirection = prefInt;
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prefInt = Preferences::GetInt(IBMBIDI_TEXTTYPE_STR,
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GET_BIDI_OPTION_TEXTTYPE(bidiOptions));
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SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt);
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prefInt = Preferences::GetInt(IBMBIDI_NUMERAL_STR,
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GET_BIDI_OPTION_NUMERAL(bidiOptions));
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SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt);
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// We don't need to force reflow: either we are initializing a new
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// prescontext or we are being called from UpdateAfterPreferencesChanged()
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// which triggers a reflow anyway.
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SetBidi(bidiOptions);
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}
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void nsPresContext::InvalidatePaintedLayers() {
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if (!mPresShell) {
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return;
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}
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if (nsIFrame* rootFrame = mPresShell->GetRootFrame()) {
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// FrameLayerBuilder caches invalidation-related values that depend on the
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// appunits-per-dev-pixel ratio, so ensure that all PaintedLayer drawing
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// is completely flushed.
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rootFrame->InvalidateFrameSubtree();
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}
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}
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void nsPresContext::AppUnitsPerDevPixelChanged() {
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int32_t oldAppUnitsPerDevPixel = mCurAppUnitsPerDevPixel;
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InvalidatePaintedLayers();
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if (mDeviceContext) {
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mDeviceContext->FlushFontCache();
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}
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MediaFeatureValuesChanged(
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{RestyleHint::RecascadeSubtree(), NS_STYLE_HINT_REFLOW,
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MediaFeatureChangeReason::ResolutionChange},
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MediaFeatureChangePropagation::JustThisDocument);
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mCurAppUnitsPerDevPixel = mDeviceContext->AppUnitsPerDevPixel();
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// Recompute the size for vh units since it's changed by the dynamic toolbar
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// max height which is stored in screen coord.
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if (IsRootContentDocumentCrossProcess()) {
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AdjustSizeForViewportUnits();
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}
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// nsSubDocumentFrame uses a AppUnitsPerDevPixel difference between parent and
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// child document to determine if it needs to build a nsDisplayZoom item. So
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// if we that changes then we need to invalidate the subdoc frame so that
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// item gets created/removed.
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if (mPresShell) {
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if (nsIFrame* frame = mPresShell->GetRootFrame()) {
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frame = nsLayoutUtils::GetCrossDocParentFrameInProcess(frame);
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if (frame) {
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int32_t parentAPD = frame->PresContext()->AppUnitsPerDevPixel();
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if ((parentAPD == oldAppUnitsPerDevPixel) !=
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(parentAPD == mCurAppUnitsPerDevPixel)) {
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frame->InvalidateFrame();
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}
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}
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}
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}
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// We would also have to look at all of our child subdocuments but the
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// InvalidatePaintedLayers call above calls InvalidateFrameSubtree which
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// would invalidate all subdocument frames already.
|
|
}
|
|
|
|
// static
|
|
void nsPresContext::PreferenceChanged(const char* aPrefName, void* aSelf) {
|
|
static_cast<nsPresContext*>(aSelf)->PreferenceChanged(aPrefName);
|
|
}
|
|
|
|
void nsPresContext::PreferenceChanged(const char* aPrefName) {
|
|
nsDependentCString prefName(aPrefName);
|
|
if (prefName.EqualsLiteral("layout.css.dpi") ||
|
|
prefName.EqualsLiteral("layout.css.devPixelsPerPx")) {
|
|
int32_t oldAppUnitsPerDevPixel = mDeviceContext->AppUnitsPerDevPixel();
|
|
// We need to assume the DPI changes, since `mDeviceContext` is shared with
|
|
// other documents, and we'd need to save the return value of the first call
|
|
// for all of them.
|
|
Unused << mDeviceContext->CheckDPIChange();
|
|
if (mPresShell) {
|
|
OwningNonNull<mozilla::PresShell> presShell(*mPresShell);
|
|
// Re-fetch the view manager's window dimensions in case there's a
|
|
// deferred resize which hasn't affected our mVisibleArea yet
|
|
nscoord oldWidthAppUnits, oldHeightAppUnits;
|
|
RefPtr<nsViewManager> vm = presShell->GetViewManager();
|
|
if (!vm) {
|
|
return;
|
|
}
|
|
vm->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
|
|
float oldWidthDevPixels = oldWidthAppUnits / oldAppUnitsPerDevPixel;
|
|
float oldHeightDevPixels = oldHeightAppUnits / oldAppUnitsPerDevPixel;
|
|
|
|
AppUnitsPerDevPixelChanged();
|
|
|
|
nscoord width = NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel());
|
|
nscoord height =
|
|
NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel());
|
|
vm->SetWindowDimensions(width, height);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (StringBeginsWith(prefName, "browser.viewport."_ns) ||
|
|
StringBeginsWith(prefName, "font.size.inflation."_ns) ||
|
|
prefName.EqualsLiteral("dom.meta-viewport.enabled")) {
|
|
if (mPresShell) {
|
|
mPresShell->MaybeReflowForInflationScreenSizeChange();
|
|
}
|
|
}
|
|
|
|
// Changing any of these potentially changes the value of @media
|
|
// (prefers-contrast).
|
|
if (prefName.EqualsLiteral("layout.css.prefers-contrast.enabled") ||
|
|
prefName.EqualsLiteral("browser.display.document_color_use") ||
|
|
prefName.EqualsLiteral("privacy.resistFingerprinting") ||
|
|
prefName.EqualsLiteral("browser.display.foreground_color") ||
|
|
prefName.EqualsLiteral("browser.display.background_color")) {
|
|
MediaFeatureValuesChanged({MediaFeatureChangeReason::PreferenceChange},
|
|
MediaFeatureChangePropagation::JustThisDocument);
|
|
}
|
|
if (prefName.EqualsLiteral(GFX_MISSING_FONTS_NOTIFY_PREF)) {
|
|
if (Preferences::GetBool(GFX_MISSING_FONTS_NOTIFY_PREF)) {
|
|
if (!mMissingFonts) {
|
|
mMissingFonts = MakeUnique<gfxMissingFontRecorder>();
|
|
// trigger reflow to detect missing fonts on the current page
|
|
mChangeHintForPrefChange |= NS_STYLE_HINT_REFLOW;
|
|
}
|
|
} else {
|
|
if (mMissingFonts) {
|
|
mMissingFonts->Clear();
|
|
}
|
|
mMissingFonts = nullptr;
|
|
}
|
|
}
|
|
if (prefName.EqualsLiteral("font.internaluseonly.changed") &&
|
|
!IsPrintingOrPrintPreview()) {
|
|
// If there's a change to the font list, we generally need to reconstruct
|
|
// frames, as the existing frames may be referring to fonts that are no
|
|
// longer available. But in the case of a static-clone document used for
|
|
// printing or print-preview, this is undesirable because the nsPrintJob
|
|
// is holding weak refs to frames that will get blown away unexpectedly by
|
|
// this reconstruction. So the prescontext for a print/preview doc ignores
|
|
// the font-list update.
|
|
//
|
|
// This means the print document may still be using cached fonts that are
|
|
// no longer present in the font list, but that should be safe given that
|
|
// all the required font instances have already been created, so it won't
|
|
// be depending on access to the font-list entries.
|
|
//
|
|
// XXX Actually, I think it's probably a bad idea to do *any* restyling of
|
|
// print documents in response to pref changes. We could be in the middle
|
|
// of printing the document, and reflowing all the frames might cause some
|
|
// kind of unwanted mid-document discontinuity.
|
|
mChangeHintForPrefChange |= nsChangeHint_ReconstructFrame;
|
|
} else if (StringBeginsWith(prefName, "font."_ns) ||
|
|
// Changes to font family preferences don't change anything in the
|
|
// computed style data, so the style system won't generate a reflow
|
|
// hint for us. We need to do that manually.
|
|
prefName.EqualsLiteral("intl.accept_languages") ||
|
|
// Changes to bidi prefs need to trigger a reflow (see bug 443629)
|
|
StringBeginsWith(prefName, "bidi."_ns) ||
|
|
// Changes to font_rendering prefs need to trigger a reflow
|
|
StringBeginsWith(prefName, "gfx.font_rendering."_ns)) {
|
|
mChangeHintForPrefChange |= NS_STYLE_HINT_REFLOW;
|
|
}
|
|
|
|
// We will end up calling InvalidatePreferenceSheets one from each pres
|
|
// context, but all it's doing is clearing its cached sheet pointers, so it
|
|
// won't be wastefully recreating the sheet multiple times.
|
|
//
|
|
// The first pres context that has its pref changed runnable called will
|
|
// be the one to cause the reconstruction of the pref style sheet.
|
|
GlobalStyleSheetCache::InvalidatePreferenceSheets();
|
|
PreferenceSheet::Refresh();
|
|
DispatchPrefChangedRunnableIfNeeded();
|
|
|
|
if (prefName.EqualsLiteral("nglayout.debug.paint_flashing") ||
|
|
prefName.EqualsLiteral("nglayout.debug.paint_flashing_chrome")) {
|
|
mPaintFlashingInitialized = false;
|
|
return;
|
|
}
|
|
}
|
|
|
|
void nsPresContext::DispatchPrefChangedRunnableIfNeeded() {
|
|
if (mPostedPrefChangedRunnable) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIRunnable> runnable =
|
|
NewRunnableMethod("nsPresContext::UpdateAfterPreferencesChanged", this,
|
|
&nsPresContext::UpdateAfterPreferencesChanged);
|
|
nsresult rv = Document()->Dispatch(TaskCategory::Other, runnable.forget());
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mPostedPrefChangedRunnable = true;
|
|
}
|
|
}
|
|
|
|
void nsPresContext::UpdateAfterPreferencesChanged() {
|
|
mPostedPrefChangedRunnable = false;
|
|
if (!mPresShell) {
|
|
return;
|
|
}
|
|
|
|
if (mDocument->IsInChromeDocShell()) {
|
|
// FIXME(emilio): Do really all these prefs not affect chrome docs? I
|
|
// suspect we should move this check somewhere else.
|
|
return;
|
|
}
|
|
|
|
StaticPresData::Get()->InvalidateFontPrefs();
|
|
|
|
// Initialize our state from the user preferences
|
|
GetUserPreferences();
|
|
|
|
// update the presShell: tell it to set the preference style rules up
|
|
mPresShell->UpdatePreferenceStyles();
|
|
|
|
InvalidatePaintedLayers();
|
|
mDeviceContext->FlushFontCache();
|
|
|
|
// Preferences require rerunning selector matching because we rebuild
|
|
// the pref style sheet for some preference changes.
|
|
RebuildAllStyleData(mChangeHintForPrefChange, RestyleHint::RestyleSubtree());
|
|
mChangeHintForPrefChange = nsChangeHint(0);
|
|
}
|
|
|
|
nsresult nsPresContext::Init(nsDeviceContext* aDeviceContext) {
|
|
NS_ASSERTION(!mInitialized, "attempt to reinit pres context");
|
|
NS_ENSURE_ARG(aDeviceContext);
|
|
|
|
mDeviceContext = aDeviceContext;
|
|
|
|
// In certain rare cases (such as changing page mode), we tear down layout
|
|
// state and re-initialize a new prescontext for a document. Given that we
|
|
// hang style state off the DOM, we detect that re-initialization case and
|
|
// lazily drop the servo data. We don't do this eagerly during layout teardown
|
|
// because that would incur an extra whole-tree traversal that's unnecessary
|
|
// most of the time.
|
|
//
|
|
// FIXME(emilio): I'm pretty sure this doesn't happen after bug 1414999.
|
|
Element* root = mDocument->GetRootElement();
|
|
if (root && root->HasServoData()) {
|
|
RestyleManager::ClearServoDataFromSubtree(root);
|
|
}
|
|
|
|
if (mDeviceContext->SetFullZoom(mFullZoom)) {
|
|
mDeviceContext->FlushFontCache();
|
|
}
|
|
mCurAppUnitsPerDevPixel = mDeviceContext->AppUnitsPerDevPixel();
|
|
|
|
mEventManager = new mozilla::EventStateManager();
|
|
|
|
mAnimationEventDispatcher = new mozilla::AnimationEventDispatcher(this);
|
|
mEffectCompositor = new mozilla::EffectCompositor(this);
|
|
mTransitionManager = MakeUnique<nsTransitionManager>(this);
|
|
mAnimationManager = MakeUnique<nsAnimationManager>(this);
|
|
|
|
if (mDocument->GetDisplayDocument()) {
|
|
NS_ASSERTION(mDocument->GetDisplayDocument()->GetPresContext(),
|
|
"Why are we being initialized?");
|
|
mRefreshDriver =
|
|
mDocument->GetDisplayDocument()->GetPresContext()->RefreshDriver();
|
|
} else {
|
|
dom::Document* parent = mDocument->GetInProcessParentDocument();
|
|
// Unfortunately, sometimes |parent| here has no presshell because
|
|
// printing screws up things. Assert that in other cases it does,
|
|
// but whenever the shell is null just fall back on using our own
|
|
// refresh driver.
|
|
NS_ASSERTION(
|
|
!parent || mDocument->IsStaticDocument() || parent->GetPresShell(),
|
|
"How did we end up with a presshell if our parent doesn't "
|
|
"have one?");
|
|
if (parent && parent->GetPresContext()) {
|
|
// XXX the document can change in AttachPresShell, does this work?
|
|
dom::BrowsingContext* browsingContext = mDocument->GetBrowsingContext();
|
|
if (browsingContext && !browsingContext->IsTop()) {
|
|
Element* containingElement = mDocument->GetEmbedderElement();
|
|
if (!containingElement->IsXULElement() ||
|
|
!containingElement->HasAttr(kNameSpaceID_None,
|
|
nsGkAtoms::forceOwnRefreshDriver)) {
|
|
mRefreshDriver = parent->GetPresContext()->RefreshDriver();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!mRefreshDriver) {
|
|
mRefreshDriver = new nsRefreshDriver(this);
|
|
}
|
|
}
|
|
|
|
// Register callbacks so we're notified when the preferences change
|
|
Preferences::RegisterPrefixCallbacks(nsPresContext::PreferenceChanged,
|
|
gPrefixCallbackPrefs, this);
|
|
Preferences::RegisterCallbacks(nsPresContext::PreferenceChanged,
|
|
gExactCallbackPrefs, this);
|
|
|
|
nsresult rv = mEventManager->Init();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mEventManager->SetPresContext(this);
|
|
|
|
#if defined(MOZ_WIDGET_ANDROID)
|
|
if (IsRootContentDocumentCrossProcess() &&
|
|
MOZ_LIKELY(
|
|
!Preferences::HasUserValue("layout.dynamic-toolbar-max-height"))) {
|
|
if (BrowserChild* browserChild =
|
|
BrowserChild::GetFrom(mDocument->GetDocShell())) {
|
|
mDynamicToolbarMaxHeight = browserChild->GetDynamicToolbarMaxHeight();
|
|
mDynamicToolbarHeight = mDynamicToolbarMaxHeight;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
mInitialized = true;
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// Note: We don't hold a reference on the shell; it has a reference to
|
|
// us
|
|
void nsPresContext::AttachPresShell(mozilla::PresShell* aPresShell) {
|
|
MOZ_ASSERT(!mPresShell);
|
|
mPresShell = aPresShell;
|
|
|
|
mRestyleManager = MakeUnique<mozilla::RestyleManager>(this);
|
|
|
|
// Since CounterStyleManager is also the name of a method of
|
|
// nsPresContext, it is necessary to prefix the class with the mozilla
|
|
// namespace here.
|
|
mCounterStyleManager = new mozilla::CounterStyleManager(this);
|
|
|
|
dom::Document* doc = mPresShell->GetDocument();
|
|
MOZ_ASSERT(doc);
|
|
// Have to update PresContext's mDocument before calling any other methods.
|
|
mDocument = doc;
|
|
// Initialize our state from the user preferences, now that we
|
|
// have a presshell, and hence a document.
|
|
GetUserPreferences();
|
|
|
|
nsIURI* docURI = doc->GetDocumentURI();
|
|
|
|
if (IsDynamic() && docURI) {
|
|
if (!docURI->SchemeIs("chrome") && !docURI->SchemeIs("resource"))
|
|
mImageAnimationMode = mImageAnimationModePref;
|
|
else
|
|
mImageAnimationMode = imgIContainer::kNormalAnimMode;
|
|
}
|
|
|
|
UpdateCharSet(doc->GetDocumentCharacterSet());
|
|
}
|
|
|
|
void nsPresContext::RecomputeBrowsingContextDependentData() {
|
|
MOZ_ASSERT(mDocument);
|
|
dom::Document* doc = mDocument;
|
|
// Resource documents inherit all this state from their display document.
|
|
while (dom::Document* outer = doc->GetDisplayDocument()) {
|
|
doc = outer;
|
|
}
|
|
auto* browsingContext = doc->GetBrowsingContext();
|
|
if (!browsingContext) {
|
|
// This can legitimately happen for e.g. SVG images. Those just get scaled
|
|
// as a result of the zoom on the embedder document so it doesn't really
|
|
// matter... Medium also doesn't affect those.
|
|
return;
|
|
}
|
|
SetFullZoom(browsingContext->FullZoom());
|
|
SetTextZoom(browsingContext->TextZoom());
|
|
SetOverrideDPPX(browsingContext->OverrideDPPX());
|
|
if (doc == mDocument) {
|
|
// Medium doesn't apply to resource documents, etc.
|
|
auto* top = browsingContext->Top();
|
|
RefPtr<nsAtom> mediumToEmulate;
|
|
if (MOZ_UNLIKELY(!top->GetMediumOverride().IsEmpty())) {
|
|
nsAutoString lower;
|
|
nsContentUtils::ASCIIToLower(top->GetMediumOverride(), lower);
|
|
mediumToEmulate = NS_Atomize(lower);
|
|
}
|
|
EmulateMedium(mediumToEmulate);
|
|
}
|
|
|
|
mDocument->EnumerateExternalResources([](dom::Document& aSubResource) {
|
|
if (nsPresContext* subResourcePc = aSubResource.GetPresContext()) {
|
|
subResourcePc->RecomputeBrowsingContextDependentData();
|
|
}
|
|
return CallState::Continue;
|
|
});
|
|
}
|
|
|
|
void nsPresContext::DetachPresShell() {
|
|
// The counter style manager's destructor needs to deallocate with the
|
|
// presshell arena. Disconnect it before nulling out the shell.
|
|
//
|
|
// XXXbholley: Given recent refactorings, it probably makes more sense to
|
|
// just null our mPresShell at the bottom of this function. I'm leaving it
|
|
// this way to preserve the old ordering, but I doubt anything would break.
|
|
if (mCounterStyleManager) {
|
|
mCounterStyleManager->Disconnect();
|
|
mCounterStyleManager = nullptr;
|
|
}
|
|
|
|
mPresShell = nullptr;
|
|
|
|
if (mAnimationEventDispatcher) {
|
|
mAnimationEventDispatcher->Disconnect();
|
|
mAnimationEventDispatcher = nullptr;
|
|
}
|
|
if (mEffectCompositor) {
|
|
mEffectCompositor->Disconnect();
|
|
mEffectCompositor = nullptr;
|
|
}
|
|
if (mTransitionManager) {
|
|
mTransitionManager->Disconnect();
|
|
mTransitionManager = nullptr;
|
|
}
|
|
if (mAnimationManager) {
|
|
mAnimationManager->Disconnect();
|
|
mAnimationManager = nullptr;
|
|
}
|
|
if (mRestyleManager) {
|
|
mRestyleManager->Disconnect();
|
|
mRestyleManager = nullptr;
|
|
}
|
|
if (mRefreshDriver && mRefreshDriver->GetPresContext() == this) {
|
|
mRefreshDriver->Disconnect();
|
|
// Can't null out the refresh driver here.
|
|
}
|
|
}
|
|
|
|
void nsPresContext::DocumentCharSetChanged(NotNull<const Encoding*> aCharSet) {
|
|
UpdateCharSet(aCharSet);
|
|
mDeviceContext->FlushFontCache();
|
|
|
|
// If a document contains one or more <script> elements, frame construction
|
|
// might happen earlier than the UpdateCharSet(), so we need to restyle
|
|
// descendants to make their style data up-to-date.
|
|
//
|
|
// FIXME(emilio): Revisit whether this is true after bug 1438911.
|
|
RebuildAllStyleData(NS_STYLE_HINT_REFLOW, RestyleHint::RecascadeSubtree());
|
|
}
|
|
|
|
void nsPresContext::UpdateCharSet(NotNull<const Encoding*> aCharSet) {
|
|
switch (GET_BIDI_OPTION_TEXTTYPE(GetBidi())) {
|
|
case IBMBIDI_TEXTTYPE_LOGICAL:
|
|
SetVisualMode(false);
|
|
break;
|
|
|
|
case IBMBIDI_TEXTTYPE_VISUAL:
|
|
SetVisualMode(true);
|
|
break;
|
|
|
|
case IBMBIDI_TEXTTYPE_CHARSET:
|
|
default:
|
|
SetVisualMode(IsVisualCharset(aCharSet));
|
|
}
|
|
}
|
|
|
|
nsPresContext* nsPresContext::GetParentPresContext() const {
|
|
mozilla::PresShell* presShell = GetPresShell();
|
|
if (presShell) {
|
|
nsViewManager* viewManager = presShell->GetViewManager();
|
|
if (viewManager) {
|
|
nsView* view = viewManager->GetRootView();
|
|
if (view) {
|
|
view = view->GetParent(); // anonymous inner view
|
|
if (view) {
|
|
view = view->GetParent(); // subdocumentframe's view
|
|
if (view) {
|
|
nsIFrame* f = view->GetFrame();
|
|
if (f) {
|
|
return f->PresContext();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsPresContext* nsPresContext::GetInProcessRootContentDocumentPresContext() {
|
|
if (IsChrome()) return nullptr;
|
|
nsPresContext* pc = this;
|
|
for (;;) {
|
|
nsPresContext* parent = pc->GetParentPresContext();
|
|
if (!parent || parent->IsChrome()) return pc;
|
|
pc = parent;
|
|
}
|
|
}
|
|
|
|
nsIWidget* nsPresContext::GetNearestWidget(nsPoint* aOffset) {
|
|
NS_ENSURE_TRUE(mPresShell, nullptr);
|
|
nsViewManager* vm = mPresShell->GetViewManager();
|
|
NS_ENSURE_TRUE(vm, nullptr);
|
|
nsView* rootView = vm->GetRootView();
|
|
NS_ENSURE_TRUE(rootView, nullptr);
|
|
return rootView->GetNearestWidget(aOffset);
|
|
}
|
|
|
|
nsIWidget* nsPresContext::GetRootWidget() const {
|
|
NS_ENSURE_TRUE(mPresShell, nullptr);
|
|
nsViewManager* vm = mPresShell->GetViewManager();
|
|
if (!vm) {
|
|
return nullptr;
|
|
}
|
|
nsCOMPtr<nsIWidget> widget;
|
|
vm->GetRootWidget(getter_AddRefs(widget));
|
|
return widget.get();
|
|
}
|
|
|
|
// We may want to replace this with something faster, maybe caching the root
|
|
// prescontext
|
|
nsRootPresContext* nsPresContext::GetRootPresContext() const {
|
|
nsPresContext* pc = const_cast<nsPresContext*>(this);
|
|
for (;;) {
|
|
nsPresContext* parent = pc->GetParentPresContext();
|
|
if (!parent) break;
|
|
pc = parent;
|
|
}
|
|
return pc->IsRoot() ? static_cast<nsRootPresContext*>(pc) : nullptr;
|
|
}
|
|
|
|
// Helper function for setting Anim Mode on image
|
|
static void SetImgAnimModeOnImgReq(imgIRequest* aImgReq, uint16_t aMode) {
|
|
if (aImgReq) {
|
|
nsCOMPtr<imgIContainer> imgCon;
|
|
aImgReq->GetImage(getter_AddRefs(imgCon));
|
|
if (imgCon) {
|
|
imgCon->SetAnimationMode(aMode);
|
|
}
|
|
}
|
|
}
|
|
|
|
// IMPORTANT: Assumption is that all images for a Presentation
|
|
// have the same Animation Mode (pavlov said this was OK)
|
|
//
|
|
// Walks content and set the animation mode
|
|
// this is a way to turn on/off image animations
|
|
void nsPresContext::SetImgAnimations(nsIContent* aParent, uint16_t aMode) {
|
|
nsCOMPtr<nsIImageLoadingContent> imgContent(do_QueryInterface(aParent));
|
|
if (imgContent) {
|
|
nsCOMPtr<imgIRequest> imgReq;
|
|
imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(imgReq));
|
|
SetImgAnimModeOnImgReq(imgReq, aMode);
|
|
}
|
|
|
|
for (nsIContent* childContent = aParent->GetFirstChild(); childContent;
|
|
childContent = childContent->GetNextSibling()) {
|
|
SetImgAnimations(childContent, aMode);
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetSMILAnimations(dom::Document* aDoc, uint16_t aNewMode,
|
|
uint16_t aOldMode) {
|
|
if (aDoc->HasAnimationController()) {
|
|
SMILAnimationController* controller = aDoc->GetAnimationController();
|
|
switch (aNewMode) {
|
|
case imgIContainer::kNormalAnimMode:
|
|
case imgIContainer::kLoopOnceAnimMode:
|
|
if (aOldMode == imgIContainer::kDontAnimMode)
|
|
controller->Resume(SMILTimeContainer::PAUSE_USERPREF);
|
|
break;
|
|
|
|
case imgIContainer::kDontAnimMode:
|
|
if (aOldMode != imgIContainer::kDontAnimMode)
|
|
controller->Pause(SMILTimeContainer::PAUSE_USERPREF);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetImageAnimationMode(uint16_t aMode) {
|
|
NS_ASSERTION(aMode == imgIContainer::kNormalAnimMode ||
|
|
aMode == imgIContainer::kDontAnimMode ||
|
|
aMode == imgIContainer::kLoopOnceAnimMode,
|
|
"Wrong Animation Mode is being set!");
|
|
|
|
// Image animation mode cannot be changed when rendering to a printer.
|
|
if (!IsDynamic()) return;
|
|
|
|
// Now walk the content tree and set the animation mode
|
|
// on all the images.
|
|
if (mPresShell) {
|
|
dom::Document* doc = mPresShell->GetDocument();
|
|
if (doc) {
|
|
doc->StyleImageLoader()->SetAnimationMode(aMode);
|
|
|
|
Element* rootElement = doc->GetRootElement();
|
|
if (rootElement) {
|
|
SetImgAnimations(rootElement, aMode);
|
|
}
|
|
SetSMILAnimations(doc, aMode, mImageAnimationMode);
|
|
}
|
|
}
|
|
|
|
mImageAnimationMode = aMode;
|
|
}
|
|
|
|
void nsPresContext::UpdateEffectiveTextZoom() {
|
|
float newZoom = mSystemFontScale * mTextZoom;
|
|
float minZoom = StaticPrefs::zoom_minPercent() / 100.0f;
|
|
float maxZoom = StaticPrefs::zoom_maxPercent() / 100.0f;
|
|
|
|
if (newZoom < minZoom) {
|
|
newZoom = minZoom;
|
|
} else if (newZoom > maxZoom) {
|
|
newZoom = maxZoom;
|
|
}
|
|
|
|
mEffectiveTextZoom = newZoom;
|
|
|
|
// Media queries could have changed, since we changed the meaning
|
|
// of 'em' units in them.
|
|
MediaFeatureValuesChanged(
|
|
{RestyleHint::RecascadeSubtree(), NS_STYLE_HINT_REFLOW,
|
|
MediaFeatureChangeReason::ZoomChange},
|
|
MediaFeatureChangePropagation::JustThisDocument);
|
|
}
|
|
|
|
float nsPresContext::GetDeviceFullZoom() {
|
|
return mDeviceContext->GetFullZoom();
|
|
}
|
|
|
|
void nsPresContext::SetFullZoom(float aZoom) {
|
|
if (!mPresShell || mFullZoom == aZoom) {
|
|
return;
|
|
}
|
|
|
|
// Re-fetch the view manager's window dimensions in case there's a deferred
|
|
// resize which hasn't affected our mVisibleArea yet
|
|
nscoord oldWidthAppUnits, oldHeightAppUnits;
|
|
mPresShell->GetViewManager()->GetWindowDimensions(&oldWidthAppUnits,
|
|
&oldHeightAppUnits);
|
|
float oldWidthDevPixels = oldWidthAppUnits / float(mCurAppUnitsPerDevPixel);
|
|
float oldHeightDevPixels = oldHeightAppUnits / float(mCurAppUnitsPerDevPixel);
|
|
mDeviceContext->SetFullZoom(aZoom);
|
|
|
|
NS_ASSERTION(!mSuppressResizeReflow,
|
|
"two zooms happening at the same time? Impossible!");
|
|
|
|
// We can't suppress the resize reflow if we support APZ zooming, as MVM
|
|
// relies on ResizeReflowIgnoreOverride() actually updating layout to update
|
|
// the viewport based on that.
|
|
RefPtr<MobileViewportManager> mvm = mPresShell->GetMobileViewportManager();
|
|
mSuppressResizeReflow = !mvm;
|
|
|
|
mFullZoom = aZoom;
|
|
|
|
AppUnitsPerDevPixelChanged();
|
|
|
|
mPresShell->GetViewManager()->SetWindowDimensions(
|
|
NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel()),
|
|
NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel()));
|
|
|
|
mSuppressResizeReflow = false;
|
|
}
|
|
|
|
void nsPresContext::SetOverrideDPPX(float aDPPX) {
|
|
// SetOverrideDPPX is called during navigations, including history
|
|
// traversals. In that case, it's typically called with our current value,
|
|
// and we don't need to actually do anything.
|
|
if (aDPPX == GetOverrideDPPX()) {
|
|
return;
|
|
}
|
|
|
|
mMediaEmulationData.mDPPX = aDPPX;
|
|
MediaFeatureValuesChanged({MediaFeatureChangeReason::ResolutionChange},
|
|
MediaFeatureChangePropagation::JustThisDocument);
|
|
}
|
|
|
|
gfxSize nsPresContext::ScreenSizeInchesForFontInflation(bool* aChanged) {
|
|
if (aChanged) {
|
|
*aChanged = false;
|
|
}
|
|
|
|
nsDeviceContext* dx = DeviceContext();
|
|
nsRect clientRect;
|
|
dx->GetClientRect(clientRect); // FIXME: GetClientRect looks expensive
|
|
float unitsPerInch = dx->AppUnitsPerPhysicalInch();
|
|
gfxSize deviceSizeInches(float(clientRect.width) / unitsPerInch,
|
|
float(clientRect.height) / unitsPerInch);
|
|
|
|
if (mLastFontInflationScreenSize == gfxSize(-1.0, -1.0)) {
|
|
mLastFontInflationScreenSize = deviceSizeInches;
|
|
}
|
|
|
|
if (deviceSizeInches != mLastFontInflationScreenSize && aChanged) {
|
|
*aChanged = true;
|
|
mLastFontInflationScreenSize = deviceSizeInches;
|
|
}
|
|
|
|
return deviceSizeInches;
|
|
}
|
|
|
|
static bool CheckOverflow(const ComputedStyle* aComputedStyle,
|
|
ScrollStyles* aStyles) {
|
|
// If they're not styled yet, we'll get around to it when constructing frames
|
|
// for the element.
|
|
if (!aComputedStyle) {
|
|
return false;
|
|
}
|
|
const nsStyleDisplay* display = aComputedStyle->StyleDisplay();
|
|
|
|
// If they will generate no box, just don't.
|
|
if (display->mDisplay == StyleDisplay::None ||
|
|
display->mDisplay == StyleDisplay::Contents) {
|
|
return false;
|
|
}
|
|
|
|
// NOTE(emilio): This check needs to match the one in
|
|
// Document::IsPotentiallyScrollable.
|
|
if (display->OverflowIsVisibleInBothAxis()) {
|
|
return false;
|
|
}
|
|
|
|
*aStyles =
|
|
ScrollStyles(*display, ScrollStyles::MapOverflowToValidScrollStyle);
|
|
return true;
|
|
}
|
|
|
|
// https://drafts.csswg.org/css-overflow/#overflow-propagation
|
|
//
|
|
// NOTE(emilio): We may need to use out-of-date styles for this, since this is
|
|
// called from nsCSSFrameConstructor::ContentRemoved. We could refactor this a
|
|
// bit to avoid doing that, and also fix correctness issues (we don't invalidate
|
|
// properly when we insert a body element and there is a previous one, for
|
|
// example).
|
|
static Element* GetPropagatedScrollStylesForViewport(
|
|
nsPresContext* aPresContext, ScrollStyles* aStyles) {
|
|
Document* document = aPresContext->Document();
|
|
Element* docElement = document->GetRootElement();
|
|
// docElement might be null if we're doing this after removing it.
|
|
if (!docElement) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Check the style on the document root element
|
|
const auto* rootStyle = Servo_Element_GetMaybeOutOfDateStyle(docElement);
|
|
if (CheckOverflow(rootStyle, aStyles)) {
|
|
// tell caller we stole the overflow style from the root element
|
|
return docElement;
|
|
}
|
|
|
|
// Don't look in the BODY for non-HTML documents or HTML documents
|
|
// with non-HTML roots.
|
|
// XXX this should be earlier; we shouldn't even look at the document root
|
|
// for non-HTML documents. Fix this once we support explicit CSS styling
|
|
// of the viewport
|
|
if (!document->IsHTMLOrXHTML() || !docElement->IsHTMLElement()) {
|
|
return nullptr;
|
|
}
|
|
|
|
Element* bodyElement = document->AsHTMLDocument()->GetBodyElement();
|
|
if (!bodyElement) {
|
|
return nullptr;
|
|
}
|
|
|
|
MOZ_ASSERT(bodyElement->IsHTMLElement(nsGkAtoms::body),
|
|
"GetBodyElement returned something bogus");
|
|
|
|
const auto* bodyStyle = Servo_Element_GetMaybeOutOfDateStyle(bodyElement);
|
|
if (CheckOverflow(bodyStyle, aStyles)) {
|
|
// tell caller we stole the overflow style from the body element
|
|
return bodyElement;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Element* nsPresContext::UpdateViewportScrollStylesOverride() {
|
|
ScrollStyles oldViewportScrollStyles = mViewportScrollStyles;
|
|
|
|
// Start off with our default styles, and then update them as needed.
|
|
mViewportScrollStyles =
|
|
ScrollStyles(StyleOverflow::Auto, StyleOverflow::Auto);
|
|
mViewportScrollOverrideElement = nullptr;
|
|
// Don't propagate the scrollbar state in printing or print preview.
|
|
if (!IsPaginated()) {
|
|
mViewportScrollOverrideElement =
|
|
GetPropagatedScrollStylesForViewport(this, &mViewportScrollStyles);
|
|
}
|
|
|
|
dom::Document* document = Document();
|
|
if (Element* fullscreenElement = document->GetFullscreenElement()) {
|
|
// If the document is in fullscreen, but the fullscreen element is
|
|
// not the root element, we should explicitly suppress the scrollbar
|
|
// here. Note that, we still need to return the original element
|
|
// the styles are from, so that the state of those elements is not
|
|
// affected across fullscreen change.
|
|
if (fullscreenElement != document->GetRootElement() &&
|
|
fullscreenElement != mViewportScrollOverrideElement) {
|
|
mViewportScrollStyles =
|
|
ScrollStyles(StyleOverflow::Hidden, StyleOverflow::Hidden);
|
|
}
|
|
}
|
|
|
|
if (mViewportScrollStyles != oldViewportScrollStyles) {
|
|
if (mPresShell) {
|
|
if (nsIFrame* frame = mPresShell->GetRootFrame()) {
|
|
frame->SchedulePaint();
|
|
}
|
|
}
|
|
}
|
|
|
|
return mViewportScrollOverrideElement;
|
|
}
|
|
|
|
bool nsPresContext::ElementWouldPropagateScrollStyles(const Element& aElement) {
|
|
if (aElement.GetParent() && !aElement.IsHTMLElement(nsGkAtoms::body)) {
|
|
// We certainly won't be propagating from this element.
|
|
return false;
|
|
}
|
|
|
|
// Go ahead and just call GetPropagatedScrollStylesForViewport, but update
|
|
// a dummy ScrollStyles we don't care about. It'll do a bit of extra work,
|
|
// but saves us having to have more complicated code or more code duplication;
|
|
// in practice we will make this call quite rarely, because we checked for all
|
|
// the common cases above.
|
|
ScrollStyles dummy(StyleOverflow::Auto, StyleOverflow::Auto);
|
|
return GetPropagatedScrollStylesForViewport(this, &dummy) == &aElement;
|
|
}
|
|
|
|
nsISupports* nsPresContext::GetContainerWeak() const {
|
|
return mDocument->GetDocShell();
|
|
}
|
|
|
|
nsDocShell* nsPresContext::GetDocShell() const {
|
|
return nsDocShell::Cast(mDocument->GetDocShell());
|
|
}
|
|
|
|
bool nsPresContext::BidiEnabled() const { return Document()->GetBidiEnabled(); }
|
|
|
|
void nsPresContext::SetBidiEnabled() const { Document()->SetBidiEnabled(); }
|
|
|
|
void nsPresContext::SetBidi(uint32_t aSource) {
|
|
// Don't do all this stuff unless the options have changed.
|
|
if (aSource == GetBidi()) {
|
|
return;
|
|
}
|
|
|
|
Document()->SetBidiOptions(aSource);
|
|
if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(aSource) ||
|
|
IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(aSource)) {
|
|
SetBidiEnabled();
|
|
}
|
|
if (IBMBIDI_TEXTTYPE_VISUAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
|
|
SetVisualMode(true);
|
|
} else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
|
|
SetVisualMode(false);
|
|
} else {
|
|
SetVisualMode(IsVisualCharset(Document()->GetDocumentCharacterSet()));
|
|
}
|
|
}
|
|
|
|
uint32_t nsPresContext::GetBidi() const { return Document()->GetBidiOptions(); }
|
|
|
|
void nsPresContext::RecordInteractionTime(InteractionType aType,
|
|
const TimeStamp& aTimeStamp) {
|
|
if (!mInteractionTimeEnabled || aTimeStamp.IsNull()) {
|
|
return;
|
|
}
|
|
|
|
// Array of references to the member variable of each time stamp
|
|
// for the different interaction types, keyed by InteractionType.
|
|
TimeStamp nsPresContext::*interactionTimes[] = {
|
|
&nsPresContext::mFirstClickTime, &nsPresContext::mFirstKeyTime,
|
|
&nsPresContext::mFirstMouseMoveTime, &nsPresContext::mFirstScrollTime};
|
|
|
|
// Array of histogram IDs for the different interaction types,
|
|
// keyed by InteractionType.
|
|
Telemetry::HistogramID histogramIds[] = {
|
|
Telemetry::TIME_TO_FIRST_CLICK_MS, Telemetry::TIME_TO_FIRST_KEY_INPUT_MS,
|
|
Telemetry::TIME_TO_FIRST_MOUSE_MOVE_MS,
|
|
Telemetry::TIME_TO_FIRST_SCROLL_MS};
|
|
|
|
TimeStamp& interactionTime =
|
|
this->*(interactionTimes[static_cast<uint32_t>(aType)]);
|
|
if (!interactionTime.IsNull()) {
|
|
// We have already recorded an interaction time.
|
|
return;
|
|
}
|
|
|
|
// Record the interaction time if it occurs after the first paint
|
|
// of the top level content document.
|
|
nsPresContext* inProcessRootPresContext =
|
|
GetInProcessRootContentDocumentPresContext();
|
|
|
|
if (!inProcessRootPresContext ||
|
|
!inProcessRootPresContext->IsRootContentDocumentCrossProcess()) {
|
|
// There is no top content pres context, or we are in a cross process
|
|
// document so we don't care about the interaction time. Record a value
|
|
// anyways to avoid trying to find the top content pres context in future
|
|
// interactions.
|
|
interactionTime = TimeStamp::Now();
|
|
return;
|
|
}
|
|
|
|
if (inProcessRootPresContext->mFirstNonBlankPaintTime.IsNull() ||
|
|
inProcessRootPresContext->mFirstNonBlankPaintTime > aTimeStamp) {
|
|
// Top content pres context has not had a non-blank paint yet
|
|
// or the event timestamp is before the first non-blank paint,
|
|
// so don't record interaction time.
|
|
return;
|
|
}
|
|
|
|
// Check if we are recording the first of any of the interaction types.
|
|
bool isFirstInteraction = true;
|
|
for (TimeStamp nsPresContext::*memberPtr : interactionTimes) {
|
|
TimeStamp& timeStamp = this->*(memberPtr);
|
|
if (!timeStamp.IsNull()) {
|
|
isFirstInteraction = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
interactionTime = TimeStamp::Now();
|
|
// Only the top level content pres context reports first interaction
|
|
// time to telemetry (if it hasn't already done so).
|
|
if (this == inProcessRootPresContext) {
|
|
if (Telemetry::CanRecordExtended()) {
|
|
double millis =
|
|
(interactionTime - mFirstNonBlankPaintTime).ToMilliseconds();
|
|
Telemetry::Accumulate(histogramIds[static_cast<uint32_t>(aType)], millis);
|
|
|
|
if (isFirstInteraction) {
|
|
Telemetry::Accumulate(Telemetry::TIME_TO_FIRST_INTERACTION_MS, millis);
|
|
}
|
|
}
|
|
} else {
|
|
inProcessRootPresContext->RecordInteractionTime(aType, aTimeStamp);
|
|
}
|
|
}
|
|
|
|
nsITheme* nsPresContext::EnsureTheme() {
|
|
MOZ_ASSERT(!mTheme);
|
|
if (Document()->ShouldAvoidNativeTheme()) {
|
|
mTheme = do_GetBasicNativeThemeDoNotUseDirectly();
|
|
} else {
|
|
mTheme = do_GetNativeThemeDoNotUseDirectly();
|
|
}
|
|
MOZ_RELEASE_ASSERT(mTheme);
|
|
return mTheme;
|
|
}
|
|
|
|
void nsPresContext::ThemeChanged(widget::ThemeChangeKind aKind) {
|
|
// NOTE(emilio): This ideally wouldn't need to be a _TEXT() marker, but
|
|
// otherwise the stack is not captured, see bug 1670046.
|
|
PROFILER_MARKER_TEXT("ThemeChanged", LAYOUT, MarkerStack::Capture(), ""_ns);
|
|
|
|
mPendingThemeChangeKind |= unsigned(aKind);
|
|
|
|
if (!mPendingThemeChanged) {
|
|
sLookAndFeelChanged = true;
|
|
sThemeChanged = true;
|
|
|
|
nsCOMPtr<nsIRunnable> ev =
|
|
NewRunnableMethod("nsPresContext::ThemeChangedInternal", this,
|
|
&nsPresContext::ThemeChangedInternal);
|
|
nsresult rv = Document()->Dispatch(TaskCategory::Other, ev.forget());
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mPendingThemeChanged = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPresContext::ThemeChangedInternal() {
|
|
mPendingThemeChanged = false;
|
|
|
|
const auto kind = widget::ThemeChangeKind(mPendingThemeChangeKind);
|
|
mPendingThemeChangeKind = 0;
|
|
|
|
// Tell the theme that it changed, so it can flush any handles to stale theme
|
|
// data.
|
|
if (mTheme && sThemeChanged) {
|
|
mTheme->ThemeChanged();
|
|
sThemeChanged = false;
|
|
}
|
|
|
|
if (sLookAndFeelChanged) {
|
|
// Clear all cached LookAndFeel colors.
|
|
LookAndFeel::Refresh();
|
|
sLookAndFeelChanged = false;
|
|
|
|
// Vector images (SVG) may be using theme colors so we discard all cached
|
|
// surfaces. (We could add a vector image only version of DiscardAll, but
|
|
// in bug 940625 we decided theme changes are rare enough not to bother.)
|
|
image::SurfaceCacheUtils::DiscardAll();
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
ContentParent::BroadcastThemeUpdate(kind);
|
|
}
|
|
}
|
|
|
|
// Reset default background and foreground colors for the document since they
|
|
// may be using system colors.
|
|
PreferenceSheet::Refresh();
|
|
|
|
// Changes to system metrics and other look and feel values can change media
|
|
// queries on them.
|
|
//
|
|
// Changes in theme can change system colors (whose changes are properly
|
|
// reflected in computed style data), system fonts (whose changes are
|
|
// some reflected (like sizes and such) and some not), and -moz-appearance
|
|
// (whose changes are not), so we need to recascade for the first, and reflow
|
|
// for the rest.
|
|
auto restyleHint = (kind & widget::ThemeChangeKind::Style)
|
|
? RestyleHint::RecascadeSubtree()
|
|
: RestyleHint{0};
|
|
auto changeHint = (kind & widget::ThemeChangeKind::Layout)
|
|
? NS_STYLE_HINT_REFLOW
|
|
: nsChangeHint(0);
|
|
MediaFeatureValuesChanged(
|
|
{restyleHint, changeHint, MediaFeatureChangeReason::SystemMetricsChange},
|
|
MediaFeatureChangePropagation::All);
|
|
}
|
|
|
|
void nsPresContext::UIResolutionChanged() {
|
|
if (!mPendingUIResolutionChanged) {
|
|
nsCOMPtr<nsIRunnable> ev =
|
|
NewRunnableMethod("nsPresContext::UIResolutionChangedInternal", this,
|
|
&nsPresContext::UIResolutionChangedInternal);
|
|
nsresult rv = Document()->Dispatch(TaskCategory::Other, ev.forget());
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mPendingUIResolutionChanged = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPresContext::UIResolutionChangedSync() {
|
|
if (!mPendingUIResolutionChanged) {
|
|
mPendingUIResolutionChanged = true;
|
|
UIResolutionChangedInternalScale(0.0);
|
|
}
|
|
}
|
|
|
|
static void NotifyTabUIResolutionChanged(nsIRemoteTab* aTab, void* aArg) {
|
|
aTab->NotifyResolutionChanged();
|
|
}
|
|
|
|
static void NotifyChildrenUIResolutionChanged(nsPIDOMWindowOuter* aWindow) {
|
|
nsCOMPtr<Document> doc = aWindow->GetExtantDoc();
|
|
RefPtr<nsPIWindowRoot> topLevelWin = nsContentUtils::GetWindowRoot(doc);
|
|
if (!topLevelWin) {
|
|
return;
|
|
}
|
|
topLevelWin->EnumerateBrowsers(NotifyTabUIResolutionChanged, nullptr);
|
|
}
|
|
|
|
void nsPresContext::UIResolutionChangedInternal() {
|
|
UIResolutionChangedInternalScale(0.0);
|
|
}
|
|
|
|
void nsPresContext::UIResolutionChangedInternalScale(double aScale) {
|
|
mPendingUIResolutionChanged = false;
|
|
|
|
mDeviceContext->CheckDPIChange(&aScale);
|
|
if (mCurAppUnitsPerDevPixel != mDeviceContext->AppUnitsPerDevPixel()) {
|
|
AppUnitsPerDevPixelChanged();
|
|
}
|
|
|
|
// Recursively notify all remote leaf descendants of the change.
|
|
if (nsPIDOMWindowOuter* window = mDocument->GetWindow()) {
|
|
NotifyChildrenUIResolutionChanged(window);
|
|
}
|
|
|
|
auto recurse = [aScale](dom::Document& aSubDoc) {
|
|
if (nsPresContext* pc = aSubDoc.GetPresContext()) {
|
|
// For subdocuments, we want to apply the parent's scale, because there
|
|
// are cases where the subdoc's device context is connected to a widget
|
|
// that has an out-of-date resolution (it's on a different screen, but
|
|
// currently hidden, and will not be updated until shown): bug 1249279.
|
|
pc->UIResolutionChangedInternalScale(aScale);
|
|
}
|
|
return CallState::Continue;
|
|
};
|
|
mDocument->EnumerateSubDocuments(recurse);
|
|
}
|
|
|
|
void nsPresContext::EmulateMedium(nsAtom* aMediaType) {
|
|
MOZ_ASSERT(!aMediaType || aMediaType->IsAsciiLowercase());
|
|
RefPtr<const nsAtom> oldMedium = Medium();
|
|
mMediaEmulationData.mMedium = aMediaType;
|
|
|
|
if (Medium() != oldMedium) {
|
|
MediaFeatureValuesChanged({MediaFeatureChangeReason::MediumChange},
|
|
MediaFeatureChangePropagation::JustThisDocument);
|
|
}
|
|
}
|
|
|
|
void nsPresContext::ContentLanguageChanged() {
|
|
PostRebuildAllStyleDataEvent(nsChangeHint(0),
|
|
RestyleHint::RecascadeSubtree());
|
|
}
|
|
|
|
bool nsPresContext::RegisterManagedPostRefreshObserver(
|
|
mozilla::ManagedPostRefreshObserver* aObserver) {
|
|
RefreshDriver()->AddPostRefreshObserver(
|
|
static_cast<nsAPostRefreshObserver*>(aObserver));
|
|
mManagedPostRefreshObservers.AppendElement(aObserver);
|
|
return true;
|
|
}
|
|
|
|
void nsPresContext::UnregisterManagedPostRefreshObserver(
|
|
mozilla::ManagedPostRefreshObserver* aObserver) {
|
|
RefreshDriver()->RemovePostRefreshObserver(
|
|
static_cast<nsAPostRefreshObserver*>(aObserver));
|
|
DebugOnly<bool> removed =
|
|
mManagedPostRefreshObservers.RemoveElement(aObserver);
|
|
MOZ_ASSERT(removed,
|
|
"ManagedPostRefreshObserver should be owned by PresContext");
|
|
}
|
|
|
|
void nsPresContext::CancelManagedPostRefreshObservers() {
|
|
auto observers = std::move(mManagedPostRefreshObservers);
|
|
nsRefreshDriver* driver = RefreshDriver();
|
|
for (const auto& observer : observers) {
|
|
observer->Cancel();
|
|
driver->RemovePostRefreshObserver(
|
|
static_cast<nsAPostRefreshObserver*>(observer));
|
|
}
|
|
}
|
|
|
|
void nsPresContext::RebuildAllStyleData(nsChangeHint aExtraHint,
|
|
const RestyleHint& aRestyleHint) {
|
|
if (!mPresShell) {
|
|
// We must have been torn down. Nothing to do here.
|
|
return;
|
|
}
|
|
|
|
// TODO(emilio): It's unclear to me why would these three calls below be
|
|
// needed. In particular, RebuildAllStyleData doesn't rebuild rules or
|
|
// specified style information and such (note the comment in
|
|
// RestyleManager::RebuildAllStyleData re. the funny semantics), so I
|
|
// don't know why should we rebuild the user font set / counter styles /
|
|
// etc...
|
|
mDocument->MarkUserFontSetDirty();
|
|
MarkCounterStylesDirty();
|
|
MarkFontFeatureValuesDirty();
|
|
PostRebuildAllStyleDataEvent(aExtraHint, aRestyleHint);
|
|
}
|
|
|
|
void nsPresContext::PostRebuildAllStyleDataEvent(
|
|
nsChangeHint aExtraHint, const RestyleHint& aRestyleHint) {
|
|
if (!mPresShell) {
|
|
// We must have been torn down. Nothing to do here.
|
|
return;
|
|
}
|
|
if (aRestyleHint.DefinitelyRecascadesAllSubtree()) {
|
|
mUsesExChUnits = false;
|
|
}
|
|
RestyleManager()->RebuildAllStyleData(aExtraHint, aRestyleHint);
|
|
}
|
|
|
|
void nsPresContext::MediaFeatureValuesChanged(
|
|
const MediaFeatureChange& aChange,
|
|
MediaFeatureChangePropagation aPropagation) {
|
|
if (mPresShell) {
|
|
mPresShell->EnsureStyleFlush();
|
|
}
|
|
|
|
if (!mPendingMediaFeatureValuesChange) {
|
|
mPendingMediaFeatureValuesChange = MakeUnique<MediaFeatureChange>(aChange);
|
|
} else {
|
|
*mPendingMediaFeatureValuesChange |= aChange;
|
|
}
|
|
|
|
if (aPropagation & MediaFeatureChangePropagation::Images) {
|
|
// Propagate the media feature value change down to any SVG images the
|
|
// document is using.
|
|
mDocument->ImageTracker()->MediaFeatureValuesChangedAllDocuments(aChange);
|
|
}
|
|
|
|
if (aPropagation & MediaFeatureChangePropagation::SubDocuments) {
|
|
// And then into any subdocuments.
|
|
auto recurse = [&aChange, aPropagation](dom::Document& aSubDoc) {
|
|
if (nsPresContext* pc = aSubDoc.GetPresContext()) {
|
|
pc->MediaFeatureValuesChanged(aChange, aPropagation);
|
|
}
|
|
return CallState::Continue;
|
|
};
|
|
mDocument->EnumerateSubDocuments(recurse);
|
|
}
|
|
}
|
|
|
|
bool nsPresContext::FlushPendingMediaFeatureValuesChanged() {
|
|
if (!mPendingMediaFeatureValuesChange) {
|
|
return false;
|
|
}
|
|
|
|
MediaFeatureChange change = *mPendingMediaFeatureValuesChange;
|
|
mPendingMediaFeatureValuesChange.reset();
|
|
|
|
// MediumFeaturesChanged updates the applied rules, so it always gets called.
|
|
if (mPresShell) {
|
|
change.mRestyleHint |=
|
|
mPresShell->StyleSet()->MediumFeaturesChanged(change.mReason);
|
|
}
|
|
|
|
const bool changedStyle = change.mRestyleHint || change.mChangeHint;
|
|
if (changedStyle) {
|
|
RebuildAllStyleData(change.mChangeHint, change.mRestyleHint);
|
|
}
|
|
|
|
if (mDocument->IsBeingUsedAsImage()) {
|
|
MOZ_ASSERT(mDocument->MediaQueryLists().isEmpty());
|
|
return changedStyle;
|
|
}
|
|
|
|
mDocument->NotifyMediaFeatureValuesChanged();
|
|
|
|
// https://drafts.csswg.org/cssom-view/#evaluate-media-queries-and-report-changes
|
|
//
|
|
// Media query list listeners should be notified from a queued task
|
|
// (in HTML5 terms), although we also want to notify them on certain
|
|
// flushes. (We're already running off an event.)
|
|
//
|
|
// TODO: This should be better integrated into the "update the rendering"
|
|
// steps: https://html.spec.whatwg.org/#update-the-rendering
|
|
//
|
|
// Note that we do this after the new style from media queries in
|
|
// style sheets has been computed.
|
|
|
|
if (mDocument->MediaQueryLists().isEmpty()) {
|
|
return changedStyle;
|
|
}
|
|
|
|
// We build a list of all the notifications we're going to send
|
|
// before we send any of them.
|
|
nsTArray<RefPtr<mozilla::dom::MediaQueryList>> listsToNotify;
|
|
for (MediaQueryList* mql = mDocument->MediaQueryLists().getFirst(); mql;
|
|
mql = static_cast<LinkedListElement<MediaQueryList>*>(mql)->getNext()) {
|
|
if (mql->MediaFeatureValuesChanged()) {
|
|
listsToNotify.AppendElement(mql);
|
|
}
|
|
}
|
|
|
|
if (!listsToNotify.IsEmpty()) {
|
|
nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
|
|
"nsPresContext::FlushPendingMediaFeatureValuesChanged",
|
|
[list = std::move(listsToNotify)] {
|
|
for (const auto& mql : list) {
|
|
nsAutoMicroTask mt;
|
|
mql->FireChangeEvent();
|
|
}
|
|
}));
|
|
}
|
|
|
|
return changedStyle;
|
|
}
|
|
|
|
void nsPresContext::SizeModeChanged(nsSizeMode aSizeMode) {
|
|
if (nsPIDOMWindowOuter* window = mDocument->GetWindow()) {
|
|
nsContentUtils::CallOnAllRemoteChildren(
|
|
window, [&aSizeMode](BrowserParent* aBrowserParent) -> CallState {
|
|
aBrowserParent->SizeModeChanged(aSizeMode);
|
|
return CallState::Continue;
|
|
});
|
|
}
|
|
MediaFeatureValuesChanged({MediaFeatureChangeReason::SizeModeChange},
|
|
MediaFeatureChangePropagation::SubDocuments);
|
|
}
|
|
|
|
nsCompatibility nsPresContext::CompatibilityMode() const {
|
|
return Document()->GetCompatibilityMode();
|
|
}
|
|
|
|
void nsPresContext::SetPaginatedScrolling(bool aPaginated) {
|
|
if (mType == eContext_PrintPreview || mType == eContext_PageLayout) {
|
|
mCanPaginatedScroll = aPaginated;
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetPrintSettings(nsIPrintSettings* aPrintSettings) {
|
|
if (mMedium != nsGkAtoms::print) {
|
|
return;
|
|
}
|
|
|
|
mPrintSettings = aPrintSettings;
|
|
mDefaultPageMargin = nsMargin();
|
|
if (!mPrintSettings) {
|
|
return;
|
|
}
|
|
|
|
// Set the presentation context to the value in the print settings.
|
|
mDrawColorBackground = mPrintSettings->GetPrintBGColors();
|
|
mDrawImageBackground = mPrintSettings->GetPrintBGImages();
|
|
|
|
nsIntMargin unwriteableTwips = mPrintSettings->GetUnwriteableMarginInTwips();
|
|
NS_ASSERTION(unwriteableTwips.top >= 0 && unwriteableTwips.right >= 0 &&
|
|
unwriteableTwips.bottom >= 0 && unwriteableTwips.left >= 0,
|
|
"Unwriteable twips should be non-negative");
|
|
|
|
nsIntMargin marginTwips = mPrintSettings->GetMarginInTwips();
|
|
marginTwips.EnsureAtLeast(unwriteableTwips);
|
|
mDefaultPageMargin = nsPresContext::CSSTwipsToAppUnits(marginTwips);
|
|
}
|
|
|
|
bool nsPresContext::EnsureVisible() {
|
|
nsCOMPtr<nsIDocShell> docShell(GetDocShell());
|
|
if (!docShell) {
|
|
return false;
|
|
}
|
|
nsCOMPtr<nsIContentViewer> cv;
|
|
docShell->GetContentViewer(getter_AddRefs(cv));
|
|
// Make sure this is the content viewer we belong with
|
|
if (!cv || cv->GetPresContext() != this) {
|
|
return false;
|
|
}
|
|
// OK, this is us. We want to call Show() on the content viewer.
|
|
nsresult result = cv->Show();
|
|
return NS_SUCCEEDED(result);
|
|
}
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
void nsPresContext::CountReflows(const char* aName, nsIFrame* aFrame) {
|
|
if (mPresShell) {
|
|
mPresShell->CountReflows(aName, aFrame);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
bool nsPresContext::HasAuthorSpecifiedRules(const nsIFrame* aFrame,
|
|
uint32_t aRuleTypeMask) const {
|
|
const bool padding = aRuleTypeMask & NS_AUTHOR_SPECIFIED_PADDING;
|
|
const bool borderBackground =
|
|
aRuleTypeMask & NS_AUTHOR_SPECIFIED_BORDER_OR_BACKGROUND;
|
|
const auto& style = *aFrame->Style();
|
|
|
|
if (padding && style.HasAuthorSpecifiedPadding()) {
|
|
return true;
|
|
}
|
|
|
|
if (borderBackground && style.HasAuthorSpecifiedBorderOrBackground()) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
gfxUserFontSet* nsPresContext::GetUserFontSet() {
|
|
return mDocument->GetUserFontSet();
|
|
}
|
|
|
|
void nsPresContext::UserFontSetUpdated(gfxUserFontEntry* aUpdatedFont) {
|
|
if (!mPresShell) {
|
|
return;
|
|
}
|
|
|
|
// Note: this method is called without a font when rules in the userfont set
|
|
// are updated.
|
|
//
|
|
// We can avoid a full restyle if font-metric-dependent units are not in use,
|
|
// since we know there's no style resolution that would depend on this font
|
|
// and trigger its load.
|
|
//
|
|
// TODO(emilio): We could be more granular if we knew which families have
|
|
// potentially changed.
|
|
if (!aUpdatedFont) {
|
|
auto hint =
|
|
UsesExChUnits() ? RestyleHint::RecascadeSubtree() : RestyleHint{0};
|
|
PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW, hint);
|
|
return;
|
|
}
|
|
|
|
// Iterate over the frame tree looking for frames associated with the
|
|
// downloadable font family in question. If a frame's nsStyleFont has
|
|
// the name, check the font group associated with the metrics to see if
|
|
// it contains that specific font (i.e. the one chosen within the family
|
|
// given the weight, width, and slant from the nsStyleFont). If it does,
|
|
// mark that frame dirty and skip inspecting its descendants.
|
|
if (nsIFrame* root = mPresShell->GetRootFrame()) {
|
|
nsFontFaceUtils::MarkDirtyForFontChange(root, aUpdatedFont);
|
|
}
|
|
}
|
|
|
|
class CounterStyleCleaner final : public nsAPostRefreshObserver {
|
|
public:
|
|
CounterStyleCleaner(nsRefreshDriver* aRefreshDriver,
|
|
CounterStyleManager* aCounterStyleManager)
|
|
: mRefreshDriver(aRefreshDriver),
|
|
mCounterStyleManager(aCounterStyleManager) {}
|
|
virtual ~CounterStyleCleaner() = default;
|
|
|
|
void DidRefresh() final {
|
|
mRefreshDriver->RemovePostRefreshObserver(this);
|
|
mCounterStyleManager->CleanRetiredStyles();
|
|
delete this;
|
|
}
|
|
|
|
private:
|
|
RefPtr<nsRefreshDriver> mRefreshDriver;
|
|
RefPtr<CounterStyleManager> mCounterStyleManager;
|
|
};
|
|
|
|
void nsPresContext::FlushCounterStyles() {
|
|
if (!mPresShell) {
|
|
return; // we've been torn down
|
|
}
|
|
if (mCounterStyleManager->IsInitial()) {
|
|
// Still in its initial state, no need to clean.
|
|
return;
|
|
}
|
|
|
|
if (mCounterStylesDirty) {
|
|
bool changed = mCounterStyleManager->NotifyRuleChanged();
|
|
if (changed) {
|
|
PresShell()->NotifyCounterStylesAreDirty();
|
|
PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW, RestyleHint{0});
|
|
RefreshDriver()->AddPostRefreshObserver(
|
|
new CounterStyleCleaner(RefreshDriver(), mCounterStyleManager));
|
|
}
|
|
mCounterStylesDirty = false;
|
|
}
|
|
}
|
|
|
|
void nsPresContext::MarkCounterStylesDirty() {
|
|
if (mCounterStyleManager->IsInitial()) {
|
|
// Still in its initial state, no need to touch anything.
|
|
return;
|
|
}
|
|
|
|
mCounterStylesDirty = true;
|
|
}
|
|
|
|
void nsPresContext::NotifyMissingFonts() {
|
|
if (mMissingFonts) {
|
|
mMissingFonts->Flush();
|
|
}
|
|
}
|
|
|
|
void nsPresContext::EnsureSafeToHandOutCSSRules() {
|
|
if (!mPresShell->StyleSet()->EnsureUniqueInnerOnCSSSheets()) {
|
|
// Nothing to do.
|
|
return;
|
|
}
|
|
|
|
RebuildAllStyleData(nsChangeHint(0), RestyleHint::RestyleSubtree());
|
|
}
|
|
|
|
void nsPresContext::FireDOMPaintEvent(
|
|
nsTArray<nsRect>* aList, TransactionId aTransactionId,
|
|
mozilla::TimeStamp aTimeStamp /* = mozilla::TimeStamp() */) {
|
|
nsPIDOMWindowInner* ourWindow = mDocument->GetInnerWindow();
|
|
if (!ourWindow) return;
|
|
|
|
nsCOMPtr<EventTarget> dispatchTarget = do_QueryInterface(ourWindow);
|
|
nsCOMPtr<EventTarget> eventTarget = dispatchTarget;
|
|
if (!IsChrome() && !mSendAfterPaintToContent) {
|
|
// Don't tell the window about this event, it should not know that
|
|
// something happened in a subdocument. Tell only the chrome event handler.
|
|
// (Events sent to the window get propagated to the chrome event handler
|
|
// automatically.)
|
|
dispatchTarget = ourWindow->GetParentTarget();
|
|
if (!dispatchTarget) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (aTimeStamp.IsNull()) {
|
|
aTimeStamp = mozilla::TimeStamp::Now();
|
|
}
|
|
DOMHighResTimeStamp timeStamp = 0;
|
|
if (ourWindow) {
|
|
mozilla::dom::Performance* perf = ourWindow->GetPerformance();
|
|
if (perf) {
|
|
timeStamp = perf->GetDOMTiming()->TimeStampToDOMHighRes(aTimeStamp);
|
|
}
|
|
}
|
|
|
|
// Events sent to the window get propagated to the chrome event handler
|
|
// automatically.
|
|
//
|
|
// This will empty our list in case dispatching the event causes more damage
|
|
// (hopefully it won't, or we're likely to get an infinite loop! At least
|
|
// it won't be blocking app execution though).
|
|
RefPtr<NotifyPaintEvent> event =
|
|
NS_NewDOMNotifyPaintEvent(eventTarget, this, nullptr, eAfterPaint, aList,
|
|
uint64_t(aTransactionId), timeStamp);
|
|
|
|
// Even if we're not telling the window about the event (so eventTarget is
|
|
// the chrome event handler, not the window), the window is still
|
|
// logically the event target.
|
|
event->SetTarget(eventTarget);
|
|
event->SetTrusted(true);
|
|
EventDispatcher::DispatchDOMEvent(dispatchTarget, nullptr,
|
|
static_cast<Event*>(event), this, nullptr);
|
|
}
|
|
|
|
static bool MayHavePaintEventListener(nsPIDOMWindowInner* aInnerWindow) {
|
|
if (!aInnerWindow) return false;
|
|
if (aInnerWindow->HasPaintEventListeners()) return true;
|
|
|
|
EventTarget* parentTarget = aInnerWindow->GetParentTarget();
|
|
if (!parentTarget) return false;
|
|
|
|
EventListenerManager* manager = nullptr;
|
|
if ((manager = parentTarget->GetExistingListenerManager()) &&
|
|
manager->MayHavePaintEventListener()) {
|
|
return true;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> node;
|
|
if (parentTarget != aInnerWindow->GetChromeEventHandler()) {
|
|
nsCOMPtr<nsIInProcessContentFrameMessageManager> mm =
|
|
do_QueryInterface(parentTarget);
|
|
if (mm) {
|
|
node = mm->GetOwnerContent();
|
|
}
|
|
}
|
|
|
|
if (!node) {
|
|
node = do_QueryInterface(parentTarget);
|
|
}
|
|
if (node)
|
|
return MayHavePaintEventListener(node->OwnerDoc()->GetInnerWindow());
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(parentTarget);
|
|
if (window) return MayHavePaintEventListener(window);
|
|
|
|
nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(parentTarget);
|
|
EventTarget* browserChildGlobal;
|
|
return root && (browserChildGlobal = root->GetParentTarget()) &&
|
|
(manager = browserChildGlobal->GetExistingListenerManager()) &&
|
|
manager->MayHavePaintEventListener();
|
|
}
|
|
|
|
bool nsPresContext::MayHavePaintEventListener() {
|
|
return ::MayHavePaintEventListener(mDocument->GetInnerWindow());
|
|
}
|
|
|
|
bool nsPresContext::MayHavePaintEventListenerInSubDocument() {
|
|
if (MayHavePaintEventListener()) {
|
|
return true;
|
|
}
|
|
|
|
bool result = false;
|
|
auto recurse = [&result](dom::Document& aSubDoc) {
|
|
if (nsPresContext* pc = aSubDoc.GetPresContext()) {
|
|
if (pc->MayHavePaintEventListenerInSubDocument()) {
|
|
result = true;
|
|
return CallState::Stop;
|
|
}
|
|
}
|
|
return CallState::Continue;
|
|
};
|
|
|
|
mDocument->EnumerateSubDocuments(recurse);
|
|
return result;
|
|
}
|
|
|
|
void nsPresContext::NotifyInvalidation(TransactionId aTransactionId,
|
|
const nsIntRect& aRect) {
|
|
// Prevent values from overflow after DevPixelsToAppUnits().
|
|
//
|
|
// DevPixelsTopAppUnits() will multiple a factor (60) to the value,
|
|
// it may make the result value over the edge (overflow) of max or
|
|
// min value of int32_t. Compute the max sized dev pixel rect that
|
|
// we can support and intersect with it.
|
|
nsIntRect clampedRect = nsIntRect::MaxIntRect();
|
|
clampedRect.ScaleInverseRoundIn(AppUnitsPerDevPixel());
|
|
|
|
clampedRect = clampedRect.Intersect(aRect);
|
|
|
|
nsRect rect(DevPixelsToAppUnits(clampedRect.x),
|
|
DevPixelsToAppUnits(clampedRect.y),
|
|
DevPixelsToAppUnits(clampedRect.width),
|
|
DevPixelsToAppUnits(clampedRect.height));
|
|
NotifyInvalidation(aTransactionId, rect);
|
|
}
|
|
|
|
nsPresContext::TransactionInvalidations* nsPresContext::GetInvalidations(
|
|
TransactionId aTransactionId) {
|
|
for (TransactionInvalidations& t : mTransactions) {
|
|
if (t.mTransactionId == aTransactionId) {
|
|
return &t;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void nsPresContext::NotifyInvalidation(TransactionId aTransactionId,
|
|
const nsRect& aRect) {
|
|
MOZ_ASSERT(GetContainerWeak(), "Invalidation in detached pres context");
|
|
|
|
// If there is no paint event listener, then we don't need to fire
|
|
// the asynchronous event. We don't even need to record invalidation.
|
|
// MayHavePaintEventListener is pretty cheap and we could make it
|
|
// even cheaper by providing a more efficient
|
|
// nsPIDOMWindow::GetListenerManager.
|
|
|
|
nsPresContext* pc;
|
|
for (pc = this; pc; pc = pc->GetParentPresContext()) {
|
|
TransactionInvalidations* transaction =
|
|
pc->GetInvalidations(aTransactionId);
|
|
if (transaction) {
|
|
break;
|
|
} else {
|
|
transaction = pc->mTransactions.AppendElement();
|
|
transaction->mTransactionId = aTransactionId;
|
|
}
|
|
}
|
|
|
|
TransactionInvalidations* transaction = GetInvalidations(aTransactionId);
|
|
MOZ_ASSERT(transaction);
|
|
transaction->mInvalidations.AppendElement(aRect);
|
|
}
|
|
|
|
/* static */
|
|
void nsPresContext::NotifySubDocInvalidation(ContainerLayer* aContainer,
|
|
const nsIntRegion* aRegion) {
|
|
ContainerLayerPresContext* data = static_cast<ContainerLayerPresContext*>(
|
|
aContainer->GetUserData(&gNotifySubDocInvalidationData));
|
|
if (!data) {
|
|
return;
|
|
}
|
|
|
|
TransactionId transactionId = aContainer->Manager()->GetLastTransactionId();
|
|
IntRect visibleBounds =
|
|
aContainer->GetVisibleRegion().GetBounds().ToUnknownRect();
|
|
|
|
if (!aRegion) {
|
|
IntRect rect(IntPoint(0, 0), visibleBounds.Size());
|
|
data->mPresContext->NotifyInvalidation(transactionId, rect);
|
|
return;
|
|
}
|
|
|
|
nsIntPoint topLeft = visibleBounds.TopLeft();
|
|
for (auto iter = aRegion->RectIter(); !iter.Done(); iter.Next()) {
|
|
nsIntRect rect(iter.Get());
|
|
// PresContext coordinate space is relative to the start of our visible
|
|
// region. Is this really true? This feels like the wrong way to get the
|
|
// right answer.
|
|
rect.MoveBy(-topLeft);
|
|
data->mPresContext->NotifyInvalidation(transactionId, rect);
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetNotifySubDocInvalidationData(
|
|
ContainerLayer* aContainer) {
|
|
ContainerLayerPresContext* pres = new ContainerLayerPresContext;
|
|
pres->mPresContext = this;
|
|
aContainer->SetUserData(&gNotifySubDocInvalidationData, pres);
|
|
}
|
|
|
|
/* static */
|
|
void nsPresContext::ClearNotifySubDocInvalidationData(
|
|
ContainerLayer* aContainer) {
|
|
aContainer->SetUserData(&gNotifySubDocInvalidationData, nullptr);
|
|
}
|
|
|
|
class DelayedFireDOMPaintEvent : public Runnable {
|
|
public:
|
|
DelayedFireDOMPaintEvent(
|
|
nsPresContext* aPresContext, nsTArray<nsRect>&& aList,
|
|
TransactionId aTransactionId,
|
|
const mozilla::TimeStamp& aTimeStamp = mozilla::TimeStamp())
|
|
: mozilla::Runnable("DelayedFireDOMPaintEvent"),
|
|
mPresContext(aPresContext),
|
|
mTransactionId(aTransactionId),
|
|
mTimeStamp(aTimeStamp),
|
|
mList(std::move(aList)) {
|
|
MOZ_ASSERT(mPresContext->GetContainerWeak(),
|
|
"DOMPaintEvent requested for a detached pres context");
|
|
}
|
|
NS_IMETHOD Run() override {
|
|
// The pres context might have been detached during the delay -
|
|
// that's fine, just don't fire the event.
|
|
if (mPresContext->GetContainerWeak()) {
|
|
mPresContext->FireDOMPaintEvent(&mList, mTransactionId, mTimeStamp);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
RefPtr<nsPresContext> mPresContext;
|
|
TransactionId mTransactionId;
|
|
const mozilla::TimeStamp mTimeStamp;
|
|
nsTArray<nsRect> mList;
|
|
};
|
|
|
|
void nsPresContext::NotifyRevokingDidPaint(TransactionId aTransactionId) {
|
|
if ((IsRoot() || !PresShell()->IsVisible()) && mTransactions.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
TransactionInvalidations* transaction = nullptr;
|
|
for (auto& t : mTransactions) {
|
|
if (t.mTransactionId == aTransactionId) {
|
|
transaction = &t;
|
|
break;
|
|
}
|
|
}
|
|
// If there are no transaction invalidations (which imply callers waiting
|
|
// on the event) for this revoked id, then we don't need to fire a
|
|
// MozAfterPaint.
|
|
if (!transaction) {
|
|
return;
|
|
}
|
|
|
|
// If there are queued transactions with an earlier id, we can't send
|
|
// our event now since it will arrive out of order. Set the waiting for
|
|
// previous transaction flag to true, and we'll send the event when
|
|
// the others are completed.
|
|
// If this is the only transaction, then we can send it immediately.
|
|
if (mTransactions.Length() == 1) {
|
|
nsCOMPtr<nsIRunnable> ev = new DelayedFireDOMPaintEvent(
|
|
this, std::move(transaction->mInvalidations),
|
|
transaction->mTransactionId, mozilla::TimeStamp());
|
|
nsContentUtils::AddScriptRunner(ev);
|
|
mTransactions.RemoveElementAt(0);
|
|
} else {
|
|
transaction->mIsWaitingForPreviousTransaction = true;
|
|
}
|
|
|
|
auto recurse = [&aTransactionId](dom::Document& aSubDoc) {
|
|
if (nsPresContext* pc = aSubDoc.GetPresContext()) {
|
|
pc->NotifyRevokingDidPaint(aTransactionId);
|
|
}
|
|
return CallState::Continue;
|
|
};
|
|
mDocument->EnumerateSubDocuments(recurse);
|
|
}
|
|
|
|
void nsPresContext::NotifyDidPaintForSubtree(
|
|
TransactionId aTransactionId, const mozilla::TimeStamp& aTimeStamp) {
|
|
if (mFirstContentfulPaintTransactionId && !mHadContentfulPaintComposite) {
|
|
if (aTransactionId >= *mFirstContentfulPaintTransactionId) {
|
|
mHadContentfulPaintComposite = true;
|
|
RefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
|
|
if (timing && !IsPrintingOrPrintPreview()) {
|
|
timing->NotifyContentfulPaintForRootContentDocument(aTimeStamp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (IsRoot() && mTransactions.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
if (!PresShell()->IsVisible() && mTransactions.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Non-root prescontexts fire MozAfterPaint to all their descendants
|
|
// unconditionally, even if no invalidations have been collected. This is
|
|
// because we don't want to eat the cost of collecting invalidations for
|
|
// every subdocument (which would require putting every subdocument in its
|
|
// own layer).
|
|
|
|
bool sent = false;
|
|
uint32_t i = 0;
|
|
while (i < mTransactions.Length()) {
|
|
if (mTransactions[i].mTransactionId <= aTransactionId) {
|
|
if (!mTransactions[i].mInvalidations.IsEmpty()) {
|
|
nsCOMPtr<nsIRunnable> ev = new DelayedFireDOMPaintEvent(
|
|
this, std::move(mTransactions[i].mInvalidations),
|
|
mTransactions[i].mTransactionId, aTimeStamp);
|
|
NS_DispatchToCurrentThreadQueue(ev.forget(),
|
|
EventQueuePriority::MediumHigh);
|
|
sent = true;
|
|
}
|
|
mTransactions.RemoveElementAt(i);
|
|
} else {
|
|
// If there are transaction which is waiting for this transaction,
|
|
// we should fire a MozAfterPaint immediately.
|
|
if (sent && mTransactions[i].mIsWaitingForPreviousTransaction) {
|
|
nsCOMPtr<nsIRunnable> ev = new DelayedFireDOMPaintEvent(
|
|
this, std::move(mTransactions[i].mInvalidations),
|
|
mTransactions[i].mTransactionId, aTimeStamp);
|
|
NS_DispatchToCurrentThreadQueue(ev.forget(),
|
|
EventQueuePriority::MediumHigh);
|
|
sent = true;
|
|
mTransactions.RemoveElementAt(i);
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (!sent) {
|
|
nsTArray<nsRect> dummy;
|
|
nsCOMPtr<nsIRunnable> ev = new DelayedFireDOMPaintEvent(
|
|
this, std::move(dummy), aTransactionId, aTimeStamp);
|
|
NS_DispatchToCurrentThreadQueue(ev.forget(),
|
|
EventQueuePriority::MediumHigh);
|
|
}
|
|
|
|
auto recurse = [&aTransactionId, &aTimeStamp](dom::Document& aSubDoc) {
|
|
if (nsPresContext* pc = aSubDoc.GetPresContext()) {
|
|
pc->NotifyDidPaintForSubtree(aTransactionId, aTimeStamp);
|
|
}
|
|
return CallState::Continue;
|
|
};
|
|
mDocument->EnumerateSubDocuments(recurse);
|
|
}
|
|
|
|
already_AddRefed<nsITimer> nsPresContext::CreateTimer(
|
|
nsTimerCallbackFunc aCallback, const char* aName, uint32_t aDelay) {
|
|
nsCOMPtr<nsITimer> timer;
|
|
NS_NewTimerWithFuncCallback(getter_AddRefs(timer), aCallback, this, aDelay,
|
|
nsITimer::TYPE_ONE_SHOT, aName,
|
|
Document()->EventTargetFor(TaskCategory::Other));
|
|
return timer.forget();
|
|
}
|
|
|
|
static bool sGotInterruptEnv = false;
|
|
enum InterruptMode { ModeRandom, ModeCounter, ModeEvent };
|
|
// Controlled by the GECKO_REFLOW_INTERRUPT_MODE env var; allowed values are
|
|
// "random" (except on Windows) or "counter". If neither is used, the mode is
|
|
// ModeEvent.
|
|
static InterruptMode sInterruptMode = ModeEvent;
|
|
#ifndef XP_WIN
|
|
// Used for the "random" mode. Controlled by the GECKO_REFLOW_INTERRUPT_SEED
|
|
// env var.
|
|
static uint32_t sInterruptSeed = 1;
|
|
#endif
|
|
// Used for the "counter" mode. This is the number of unskipped interrupt
|
|
// checks that have to happen before we interrupt. Controlled by the
|
|
// GECKO_REFLOW_INTERRUPT_FREQUENCY env var.
|
|
static uint32_t sInterruptMaxCounter = 10;
|
|
// Used for the "counter" mode. This counts up to sInterruptMaxCounter and is
|
|
// then reset to 0.
|
|
static uint32_t sInterruptCounter;
|
|
// Number of interrupt checks to skip before really trying to interrupt.
|
|
// Controlled by the GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP env var.
|
|
static uint32_t sInterruptChecksToSkip = 200;
|
|
// Number of milliseconds that a reflow should be allowed to run for before we
|
|
// actually allow interruption. Controlled by the
|
|
// GECKO_REFLOW_MIN_NOINTERRUPT_DURATION env var. Can't be initialized here,
|
|
// because TimeDuration/TimeStamp is not safe to use in static constructors..
|
|
static TimeDuration sInterruptTimeout;
|
|
|
|
static void GetInterruptEnv() {
|
|
char* ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_MODE");
|
|
if (ev) {
|
|
#ifndef XP_WIN
|
|
if (PL_strcasecmp(ev, "random") == 0) {
|
|
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_SEED");
|
|
if (ev) {
|
|
sInterruptSeed = atoi(ev);
|
|
}
|
|
srandom(sInterruptSeed);
|
|
sInterruptMode = ModeRandom;
|
|
} else
|
|
#endif
|
|
if (PL_strcasecmp(ev, "counter") == 0) {
|
|
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_FREQUENCY");
|
|
if (ev) {
|
|
sInterruptMaxCounter = atoi(ev);
|
|
}
|
|
sInterruptCounter = 0;
|
|
sInterruptMode = ModeCounter;
|
|
}
|
|
}
|
|
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP");
|
|
if (ev) {
|
|
sInterruptChecksToSkip = atoi(ev);
|
|
}
|
|
|
|
ev = PR_GetEnv("GECKO_REFLOW_MIN_NOINTERRUPT_DURATION");
|
|
int duration_ms = ev ? atoi(ev) : 100;
|
|
sInterruptTimeout = TimeDuration::FromMilliseconds(duration_ms);
|
|
}
|
|
|
|
bool nsPresContext::HavePendingInputEvent() {
|
|
switch (sInterruptMode) {
|
|
#ifndef XP_WIN
|
|
case ModeRandom:
|
|
return (random() & 1);
|
|
#endif
|
|
case ModeCounter:
|
|
if (sInterruptCounter < sInterruptMaxCounter) {
|
|
++sInterruptCounter;
|
|
return false;
|
|
}
|
|
sInterruptCounter = 0;
|
|
return true;
|
|
default:
|
|
case ModeEvent: {
|
|
nsIFrame* f = PresShell()->GetRootFrame();
|
|
if (f) {
|
|
nsIWidget* w = f->GetNearestWidget();
|
|
if (w) {
|
|
return w->HasPendingInputEvent();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool nsPresContext::HasPendingRestyleOrReflow() {
|
|
mozilla::PresShell* presShell = PresShell();
|
|
return presShell->NeedStyleFlush() || presShell->HasPendingReflow();
|
|
}
|
|
|
|
void nsPresContext::ReflowStarted(bool aInterruptible) {
|
|
#ifdef NOISY_INTERRUPTIBLE_REFLOW
|
|
if (!aInterruptible) {
|
|
printf("STARTING NONINTERRUPTIBLE REFLOW\n");
|
|
}
|
|
#endif
|
|
// We don't support interrupting in paginated contexts, since page
|
|
// sequences only handle initial reflow
|
|
mInterruptsEnabled = aInterruptible && !IsPaginated() &&
|
|
StaticPrefs::layout_interruptible_reflow_enabled();
|
|
|
|
// Don't set mHasPendingInterrupt based on HavePendingInputEvent() here. If
|
|
// we ever change that, then we need to update the code in
|
|
// PresShell::DoReflow to only add the just-reflown root to dirty roots if
|
|
// it's actually dirty. Otherwise we can end up adding a root that has no
|
|
// interruptible descendants, just because we detected an interrupt at reflow
|
|
// start.
|
|
mHasPendingInterrupt = false;
|
|
|
|
mInterruptChecksToSkip = sInterruptChecksToSkip;
|
|
|
|
if (mInterruptsEnabled) {
|
|
mReflowStartTime = TimeStamp::Now();
|
|
}
|
|
}
|
|
|
|
bool nsPresContext::CheckForInterrupt(nsIFrame* aFrame) {
|
|
if (mHasPendingInterrupt) {
|
|
mPresShell->FrameNeedsToContinueReflow(aFrame);
|
|
return true;
|
|
}
|
|
|
|
if (!sGotInterruptEnv) {
|
|
sGotInterruptEnv = true;
|
|
GetInterruptEnv();
|
|
}
|
|
|
|
if (!mInterruptsEnabled) {
|
|
return false;
|
|
}
|
|
|
|
if (mInterruptChecksToSkip > 0) {
|
|
--mInterruptChecksToSkip;
|
|
return false;
|
|
}
|
|
mInterruptChecksToSkip = sInterruptChecksToSkip;
|
|
|
|
// Don't interrupt if it's been less than sInterruptTimeout since we started
|
|
// the reflow.
|
|
mHasPendingInterrupt =
|
|
TimeStamp::Now() - mReflowStartTime > sInterruptTimeout &&
|
|
HavePendingInputEvent() && !IsChrome();
|
|
|
|
if (mPendingInterruptFromTest) {
|
|
mPendingInterruptFromTest = false;
|
|
mHasPendingInterrupt = true;
|
|
}
|
|
|
|
if (mHasPendingInterrupt) {
|
|
#ifdef NOISY_INTERRUPTIBLE_REFLOW
|
|
printf("*** DETECTED pending interrupt (time=%lld)\n", PR_Now());
|
|
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
|
|
mPresShell->FrameNeedsToContinueReflow(aFrame);
|
|
}
|
|
return mHasPendingInterrupt;
|
|
}
|
|
|
|
nsIFrame* nsPresContext::GetPrimaryFrameFor(nsIContent* aContent) {
|
|
MOZ_ASSERT(aContent, "Don't do that");
|
|
if (GetPresShell() &&
|
|
GetPresShell()->GetDocument() == aContent->GetComposedDoc()) {
|
|
return aContent->GetPrimaryFrame();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
size_t nsPresContext::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
|
|
// Measurement may be added later if DMD finds it is worthwhile.
|
|
return 0;
|
|
}
|
|
|
|
bool nsPresContext::IsRootContentDocument() const {
|
|
// Default to the in process version for now, but we should try
|
|
// to remove callers of this.
|
|
return IsRootContentDocumentInProcess();
|
|
}
|
|
|
|
bool nsPresContext::IsRootContentDocumentInProcess() const {
|
|
if (mDocument->IsResourceDoc()) {
|
|
return false;
|
|
}
|
|
if (IsChrome()) {
|
|
return false;
|
|
}
|
|
// We may not have a root frame, so use views.
|
|
nsView* view = PresShell()->GetViewManager()->GetRootView();
|
|
if (!view) {
|
|
return false;
|
|
}
|
|
view = view->GetParent(); // anonymous inner view
|
|
if (!view) {
|
|
return true;
|
|
}
|
|
view = view->GetParent(); // subdocumentframe's view
|
|
if (!view) {
|
|
return true;
|
|
}
|
|
|
|
nsIFrame* f = view->GetFrame();
|
|
return (f && f->PresContext()->IsChrome());
|
|
}
|
|
|
|
bool nsPresContext::IsRootContentDocumentCrossProcess() const {
|
|
if (mDocument->IsResourceDoc()) {
|
|
return false;
|
|
}
|
|
|
|
return mDocument->IsTopLevelContentDocument();
|
|
}
|
|
|
|
void nsPresContext::NotifyNonBlankPaint() {
|
|
MOZ_ASSERT(!mHadNonBlankPaint);
|
|
mHadNonBlankPaint = true;
|
|
if (IsRootContentDocument()) {
|
|
RefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
|
|
if (timing && !IsPrintingOrPrintPreview()) {
|
|
timing->NotifyNonBlankPaintForRootContentDocument();
|
|
}
|
|
|
|
mFirstNonBlankPaintTime = TimeStamp::Now();
|
|
}
|
|
}
|
|
|
|
void nsPresContext::NotifyContentfulPaint() {
|
|
nsRootPresContext* rootPresContext = GetRootPresContext();
|
|
if (!rootPresContext) {
|
|
return;
|
|
}
|
|
if (!mHadContentfulPaint) {
|
|
#if defined(MOZ_WIDGET_ANDROID)
|
|
if (!mHadNonTickContentfulPaint) {
|
|
(new AsyncEventDispatcher(mDocument, u"MozFirstContentfulPaint"_ns,
|
|
CanBubble::eYes, ChromeOnlyDispatch::eYes))
|
|
->PostDOMEvent();
|
|
}
|
|
#endif
|
|
if (!rootPresContext->RefreshDriver()->IsInRefresh()) {
|
|
if (!mHadNonTickContentfulPaint) {
|
|
rootPresContext->RefreshDriver()
|
|
->AddForceNotifyContentfulPaintPresContext(this);
|
|
mHadNonTickContentfulPaint = true;
|
|
}
|
|
return;
|
|
}
|
|
mHadContentfulPaint = true;
|
|
mFirstContentfulPaintTransactionId =
|
|
Some(rootPresContext->mRefreshDriver->LastTransactionId().Next());
|
|
if (nsPIDOMWindowInner* innerWindow = mDocument->GetInnerWindow()) {
|
|
if (Performance* perf = innerWindow->GetPerformance()) {
|
|
TimeStamp nowTime = rootPresContext->RefreshDriver()->MostRecentRefresh(
|
|
/* aEnsureTimerStarted */ false);
|
|
MOZ_ASSERT(!nowTime.IsNull(),
|
|
"Most recent refresh timestamp should exist since we are in "
|
|
"a refresh driver tick");
|
|
MOZ_ASSERT(rootPresContext->RefreshDriver()->IsInRefresh(),
|
|
"We should only notify contentful paint during refresh "
|
|
"driver ticks");
|
|
RefPtr<PerformancePaintTiming> paintTiming = new PerformancePaintTiming(
|
|
perf, u"first-contentful-paint"_ns, nowTime);
|
|
perf->SetFCPTimingEntry(paintTiming);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPresContext::NotifyPaintStatusReset() {
|
|
mHadNonBlankPaint = false;
|
|
mHadContentfulPaint = false;
|
|
#if defined(MOZ_WIDGET_ANDROID)
|
|
(new AsyncEventDispatcher(mDocument, u"MozPaintStatusReset"_ns,
|
|
CanBubble::eYes, ChromeOnlyDispatch::eYes))
|
|
->PostDOMEvent();
|
|
#endif
|
|
mHadNonTickContentfulPaint = false;
|
|
}
|
|
|
|
void nsPresContext::NotifyDOMContentFlushed() {
|
|
NS_ENSURE_TRUE_VOID(mPresShell);
|
|
if (IsRootContentDocument()) {
|
|
RefPtr<nsDOMNavigationTiming> timing = mDocument->GetNavigationTiming();
|
|
if (timing) {
|
|
timing->NotifyDOMContentFlushedForRootContentDocument();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool nsPresContext::GetPaintFlashing() const {
|
|
if (!mPaintFlashingInitialized) {
|
|
bool pref = Preferences::GetBool("nglayout.debug.paint_flashing");
|
|
if (!pref && IsChrome()) {
|
|
pref = Preferences::GetBool("nglayout.debug.paint_flashing_chrome");
|
|
}
|
|
mPaintFlashing = pref;
|
|
mPaintFlashingInitialized = true;
|
|
}
|
|
return mPaintFlashing;
|
|
}
|
|
|
|
nscoord nsPresContext::GfxUnitsToAppUnits(gfxFloat aGfxUnits) const {
|
|
return mDeviceContext->GfxUnitsToAppUnits(aGfxUnits);
|
|
}
|
|
|
|
gfxFloat nsPresContext::AppUnitsToGfxUnits(nscoord aAppUnits) const {
|
|
return mDeviceContext->AppUnitsToGfxUnits(aAppUnits);
|
|
}
|
|
|
|
nscoord nsPresContext::PhysicalMillimetersToAppUnits(float aMM) const {
|
|
float inches = aMM / MM_PER_INCH_FLOAT;
|
|
return NSToCoordFloorClamped(
|
|
inches * float(DeviceContext()->AppUnitsPerPhysicalInch()));
|
|
}
|
|
|
|
bool nsPresContext::IsDeviceSizePageSize() {
|
|
nsIDocShell* docShell = GetDocShell();
|
|
return docShell && docShell->GetDeviceSizeIsPageSize();
|
|
}
|
|
|
|
uint64_t nsPresContext::GetRestyleGeneration() const {
|
|
if (!mRestyleManager) {
|
|
return 0;
|
|
}
|
|
return mRestyleManager->GetRestyleGeneration();
|
|
}
|
|
|
|
uint64_t nsPresContext::GetUndisplayedRestyleGeneration() const {
|
|
if (!mRestyleManager) {
|
|
return 0;
|
|
}
|
|
return mRestyleManager->GetUndisplayedRestyleGeneration();
|
|
}
|
|
|
|
nsBidi& nsPresContext::GetBidiEngine() {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
if (!mBidiEngine) {
|
|
mBidiEngine.reset(new nsBidi());
|
|
}
|
|
return *mBidiEngine;
|
|
}
|
|
|
|
void nsPresContext::FlushFontFeatureValues() {
|
|
if (!mPresShell) {
|
|
return; // we've been torn down
|
|
}
|
|
|
|
if (mFontFeatureValuesDirty) {
|
|
ServoStyleSet* styleSet = mPresShell->StyleSet();
|
|
mFontFeatureValuesLookup = styleSet->BuildFontFeatureValueSet();
|
|
mFontFeatureValuesDirty = false;
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetVisibleArea(const nsRect& r) {
|
|
if (!r.IsEqualEdges(mVisibleArea)) {
|
|
mVisibleArea = r;
|
|
mSizeForViewportUnits = mVisibleArea.Size();
|
|
if (IsRootContentDocumentCrossProcess()) {
|
|
AdjustSizeForViewportUnits();
|
|
}
|
|
// Visible area does not affect media queries when paginated.
|
|
if (!IsRootPaginatedDocument()) {
|
|
MediaFeatureValuesChanged(
|
|
{mozilla::MediaFeatureChangeReason::ViewportChange},
|
|
MediaFeatureChangePropagation::JustThisDocument);
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPresContext::SetDynamicToolbarMaxHeight(ScreenIntCoord aHeight) {
|
|
MOZ_ASSERT(IsRootContentDocumentCrossProcess());
|
|
|
|
if (mDynamicToolbarMaxHeight == aHeight) {
|
|
return;
|
|
}
|
|
mDynamicToolbarMaxHeight = aHeight;
|
|
mDynamicToolbarHeight = aHeight;
|
|
|
|
AdjustSizeForViewportUnits();
|
|
|
|
if (RefPtr<mozilla::PresShell> presShell = mPresShell) {
|
|
// Changing the max height of the dynamic toolbar changes the ICB size, we
|
|
// need to kick a reflow with the current window dimensions since the max
|
|
// height change doesn't change the window dimensions but
|
|
// PresShell::ResizeReflow ends up subtracting the new dynamic toolbar
|
|
// height from the window dimensions and kick a reflow with the proper ICB
|
|
// size.
|
|
nscoord currentWidth, currentHeight;
|
|
presShell->GetViewManager()->GetWindowDimensions(¤tWidth,
|
|
¤tHeight);
|
|
presShell->ResizeReflow(currentWidth, currentHeight,
|
|
ResizeReflowOptions::NoOption);
|
|
}
|
|
}
|
|
|
|
void nsPresContext::AdjustSizeForViewportUnits() {
|
|
MOZ_ASSERT(IsRootContentDocumentCrossProcess());
|
|
if (mVisibleArea.height == NS_UNCONSTRAINEDSIZE) {
|
|
// Ignore `NS_UNCONSTRAINEDSIZE` since it's a temporary state during a
|
|
// reflow. We will end up calling this function again with a proper size in
|
|
// the same reflow.
|
|
return;
|
|
}
|
|
|
|
if (MOZ_UNLIKELY(mVisibleArea.height +
|
|
NSIntPixelsToAppUnits(mDynamicToolbarMaxHeight,
|
|
mCurAppUnitsPerDevPixel) >
|
|
nscoord_MAX)) {
|
|
MOZ_ASSERT_UNREACHABLE("The dynamic toolbar max height is probably wrong");
|
|
return;
|
|
}
|
|
|
|
mSizeForViewportUnits.height =
|
|
mVisibleArea.height +
|
|
NSIntPixelsToAppUnits(mDynamicToolbarMaxHeight, mCurAppUnitsPerDevPixel);
|
|
}
|
|
|
|
void nsPresContext::UpdateDynamicToolbarOffset(ScreenIntCoord aOffset) {
|
|
MOZ_ASSERT(IsRootContentDocumentCrossProcess());
|
|
if (!mPresShell) {
|
|
return;
|
|
}
|
|
|
|
if (!HasDynamicToolbar()) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(-mDynamicToolbarMaxHeight <= aOffset && aOffset <= 0);
|
|
if (mDynamicToolbarHeight == mDynamicToolbarMaxHeight + aOffset) {
|
|
return;
|
|
}
|
|
|
|
// Forcibly flush position:fixed elements in the case where the dynamic
|
|
// toolbar is going to be completely hidden or starts to be visible so that
|
|
// %-based style values will be recomputed with the visual viewport size which
|
|
// is including the area covered by the dynamic toolbar.
|
|
if (mDynamicToolbarHeight == 0 || aOffset == -mDynamicToolbarMaxHeight) {
|
|
mPresShell->MarkFixedFramesForReflow(IntrinsicDirty::Resize);
|
|
mPresShell->AddResizeEventFlushObserverIfNeeded();
|
|
}
|
|
|
|
mDynamicToolbarHeight = mDynamicToolbarMaxHeight + aOffset;
|
|
|
|
if (RefPtr<MobileViewportManager> mvm =
|
|
mPresShell->GetMobileViewportManager()) {
|
|
mvm->UpdateVisualViewportSizeByDynamicToolbar(-aOffset);
|
|
}
|
|
}
|
|
|
|
DynamicToolbarState nsPresContext::GetDynamicToolbarState() const {
|
|
if (!IsRootContentDocumentCrossProcess() || !HasDynamicToolbar()) {
|
|
return DynamicToolbarState::None;
|
|
}
|
|
|
|
if (mDynamicToolbarMaxHeight == mDynamicToolbarHeight) {
|
|
return DynamicToolbarState::Expanded;
|
|
} else if (mDynamicToolbarHeight == 0) {
|
|
return DynamicToolbarState::Collapsed;
|
|
}
|
|
return DynamicToolbarState::InTransition;
|
|
}
|
|
|
|
void nsPresContext::SetSafeAreaInsets(const ScreenIntMargin& aSafeAreaInsets) {
|
|
if (mSafeAreaInsets == aSafeAreaInsets) {
|
|
return;
|
|
}
|
|
mSafeAreaInsets = aSafeAreaInsets;
|
|
|
|
PostRebuildAllStyleDataEvent(nsChangeHint(0),
|
|
RestyleHint::RecascadeSubtree());
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
|
|
void nsPresContext::ValidatePresShellAndDocumentReleation() const {
|
|
NS_ASSERTION(!mPresShell || !mPresShell->GetDocument() ||
|
|
mPresShell->GetDocument() == mDocument,
|
|
"nsPresContext doesn't have the same document as nsPresShell!");
|
|
}
|
|
|
|
#endif // #ifdef DEBUG
|
|
|
|
nsRootPresContext::nsRootPresContext(dom::Document* aDocument,
|
|
nsPresContextType aType)
|
|
: nsPresContext(aDocument, aType) {}
|
|
|
|
void nsRootPresContext::AddWillPaintObserver(nsIRunnable* aRunnable) {
|
|
if (!mWillPaintFallbackEvent.IsPending()) {
|
|
mWillPaintFallbackEvent = new RunWillPaintObservers(this);
|
|
Document()->Dispatch(TaskCategory::Other,
|
|
do_AddRef(mWillPaintFallbackEvent));
|
|
}
|
|
mWillPaintObservers.AppendElement(aRunnable);
|
|
}
|
|
|
|
/**
|
|
* Run all runnables that need to get called before the next paint.
|
|
*/
|
|
void nsRootPresContext::FlushWillPaintObservers() {
|
|
mWillPaintFallbackEvent = nullptr;
|
|
nsTArray<nsCOMPtr<nsIRunnable>> observers = std::move(mWillPaintObservers);
|
|
for (uint32_t i = 0; i < observers.Length(); ++i) {
|
|
observers[i]->Run();
|
|
}
|
|
}
|
|
|
|
size_t nsRootPresContext::SizeOfExcludingThis(
|
|
MallocSizeOf aMallocSizeOf) const {
|
|
return nsPresContext::SizeOfExcludingThis(aMallocSizeOf);
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - mWillPaintObservers
|
|
// - mWillPaintFallbackEvent
|
|
}
|