mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
79ff09761b
Without this patch, patch 3 will cause bugs where we'll never remove the cover rule we create during the process of starting a transition. This won't actually be problematic during the transition, since the transition will overwrite it, but once the transition completes, the cover rule will still be around, and we'll be stuck with the pre-transition value instead of the post-transition value. It's possible it also fixes existing bugs prior to the patch series in this bug.
532 lines
21 KiB
C++
532 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/*
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* the container for the style sheets that apply to a presentation, and
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* the internal API that the style system exposes for creating (and
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* potentially re-creating) style contexts
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*/
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#ifndef nsStyleSet_h_
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#define nsStyleSet_h_
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#include "mozilla/Attributes.h"
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#include "mozilla/CSSStyleSheet.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsIStyleRuleProcessor.h"
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#include "nsBindingManager.h"
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#include "nsRuleNode.h"
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#include "nsTArray.h"
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#include "nsCOMArray.h"
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#include "nsAutoPtr.h"
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#include "nsIStyleRule.h"
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#include "nsCSSPseudoElements.h"
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class gfxFontFeatureValueSet;
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class nsCSSFontFaceRule;
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class nsCSSKeyframesRule;
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class nsCSSFontFeatureValuesRule;
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class nsCSSPageRule;
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class nsCSSCounterStyleRule;
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class nsRuleWalker;
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struct ElementDependentRuleProcessorData;
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struct TreeMatchContext;
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namespace mozilla {
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class EventStates;
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} // namespace mozilla
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class nsEmptyStyleRule MOZ_FINAL : public nsIStyleRule
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{
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private:
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~nsEmptyStyleRule() {}
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public:
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NS_DECL_ISUPPORTS
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virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
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#endif
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};
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class nsInitialStyleRule MOZ_FINAL : public nsIStyleRule
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{
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private:
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~nsInitialStyleRule() {}
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public:
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NS_DECL_ISUPPORTS
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virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
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#endif
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};
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class nsDisableTextZoomStyleRule MOZ_FINAL : public nsIStyleRule
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{
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private:
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~nsDisableTextZoomStyleRule() {}
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public:
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NS_DECL_ISUPPORTS
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virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
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#endif
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};
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// The style set object is created by the document viewer and ownership is
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// then handed off to the PresShell. Only the PresShell should delete a
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// style set.
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class nsStyleSet
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{
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public:
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nsStyleSet();
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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void Init(nsPresContext *aPresContext);
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nsRuleNode* GetRuleTree() { return mRuleTree; }
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// enable / disable the Quirk style sheet
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void EnableQuirkStyleSheet(bool aEnable);
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// get a style context for a non-pseudo frame.
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already_AddRefed<nsStyleContext>
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ResolveStyleFor(mozilla::dom::Element* aElement,
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nsStyleContext* aParentContext);
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already_AddRefed<nsStyleContext>
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ResolveStyleFor(mozilla::dom::Element* aElement,
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nsStyleContext* aParentContext,
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TreeMatchContext& aTreeMatchContext);
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// Get a style context (with the given parent) for the
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// sequence of style rules in the |aRules| array.
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already_AddRefed<nsStyleContext>
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ResolveStyleForRules(nsStyleContext* aParentContext,
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const nsTArray< nsCOMPtr<nsIStyleRule> > &aRules);
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// Get a style context that represents aBaseContext, but as though
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// it additionally matched the rules in the aRules array (in that
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// order, as more specific than any other rules).
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//
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// One of the following must hold:
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// 1. The resulting style context must be used only on a temporary
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// basis, and it must never be put into the style context tree
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// (and, in particular, we must never call
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// ResolveStyleWithReplacement with it as the old context, which
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// might happen if it is put in the style context tree), or
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// 2. The additional rules must be appropriate for the transitions
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// level of the cascade, which is the highest level of the cascade.
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// (This is the case for one current caller, the cover rule used
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// for CSS transitions.)
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already_AddRefed<nsStyleContext>
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ResolveStyleByAddingRules(nsStyleContext* aBaseContext,
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const nsCOMArray<nsIStyleRule> &aRules);
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// Resolve style by making replacements in the list of style rules as
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// described by aReplacements, but otherwise maintaining the status
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// quo.
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already_AddRefed<nsStyleContext>
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ResolveStyleWithReplacement(mozilla::dom::Element* aElement,
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nsStyleContext* aNewParentContext,
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nsStyleContext* aOldStyleContext,
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nsRestyleHint aReplacements);
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// Get a style context for a non-element (which no rules will match),
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// such as text nodes, placeholder frames, and the nsFirstLetterFrame
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// for everything after the first letter.
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//
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// Perhaps this should go away and we shouldn't even create style
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// contexts for such content nodes. However, not doing any rule
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// matching for them is a first step.
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already_AddRefed<nsStyleContext>
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ResolveStyleForNonElement(nsStyleContext* aParentContext);
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// Get a style context for a pseudo-element. aParentElement must be
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// non-null. aPseudoID is the nsCSSPseudoElements::Type for the
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// pseudo-element. aPseudoElement must be non-null if the pseudo-element
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// type is one that allows user action pseudo-classes after it; otherwise,
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// it is ignored.
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already_AddRefed<nsStyleContext>
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ResolvePseudoElementStyle(mozilla::dom::Element* aParentElement,
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nsCSSPseudoElements::Type aType,
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nsStyleContext* aParentContext,
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mozilla::dom::Element* aPseudoElement);
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// This functions just like ResolvePseudoElementStyle except that it will
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// return nullptr if there are no explicit style rules for that
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// pseudo element.
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already_AddRefed<nsStyleContext>
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ProbePseudoElementStyle(mozilla::dom::Element* aParentElement,
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nsCSSPseudoElements::Type aType,
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nsStyleContext* aParentContext);
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already_AddRefed<nsStyleContext>
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ProbePseudoElementStyle(mozilla::dom::Element* aParentElement,
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nsCSSPseudoElements::Type aType,
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nsStyleContext* aParentContext,
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TreeMatchContext& aTreeMatchContext,
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mozilla::dom::Element* aPseudoElement = nullptr);
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// Get a style context for an anonymous box. aPseudoTag is the
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// pseudo-tag to use and must be non-null.
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already_AddRefed<nsStyleContext>
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ResolveAnonymousBoxStyle(nsIAtom* aPseudoTag, nsStyleContext* aParentContext);
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#ifdef MOZ_XUL
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// Get a style context for a XUL tree pseudo. aPseudoTag is the
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// pseudo-tag to use and must be non-null. aParentContent must be
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// non-null. aComparator must be non-null.
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already_AddRefed<nsStyleContext>
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ResolveXULTreePseudoStyle(mozilla::dom::Element* aParentElement,
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nsIAtom* aPseudoTag,
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nsStyleContext* aParentContext,
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nsICSSPseudoComparator* aComparator);
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#endif
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// Append all the currently-active font face rules to aArray. Return
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// true for success and false for failure.
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bool AppendFontFaceRules(nsPresContext* aPresContext,
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nsTArray<nsFontFaceRuleContainer>& aArray);
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// Return the winning (in the cascade) @keyframes rule for the given name.
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nsCSSKeyframesRule* KeyframesRuleForName(nsPresContext* aPresContext,
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const nsString& aName);
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// Return the winning (in the cascade) @counter-style rule for the given name.
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nsCSSCounterStyleRule* CounterStyleRuleForName(nsPresContext* aPresContext,
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const nsAString& aName);
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// Fetch object for looking up font feature values
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already_AddRefed<gfxFontFeatureValueSet> GetFontFeatureValuesLookup();
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// Append all the currently-active font feature values rules to aArray.
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// Return true for success and false for failure.
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bool AppendFontFeatureValuesRules(nsPresContext* aPresContext,
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nsTArray<nsCSSFontFeatureValuesRule*>& aArray);
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// Append all the currently-active page rules to aArray. Return
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// true for success and false for failure.
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bool AppendPageRules(nsPresContext* aPresContext,
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nsTArray<nsCSSPageRule*>& aArray);
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// Begin ignoring style context destruction, to avoid lots of unnecessary
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// work on document teardown.
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void BeginShutdown(nsPresContext* aPresContext);
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// Free all of the data associated with this style set.
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void Shutdown(nsPresContext* aPresContext);
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// Notification that a style context is being destroyed.
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void NotifyStyleContextDestroyed(nsPresContext* aPresContext,
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nsStyleContext* aStyleContext);
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// Get a new style context that lives in a different parent
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// The new context will be the same as the old if the new parent is the
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// same as the old parent.
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// aElement should be non-null if this is a style context for an
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// element or pseudo-element; in the latter case it should be the
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// real element the pseudo-element is for.
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// aElementOrPseudoElement should be the same, except for
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// pseudo-elements it should be the pseudo-element. It is temporary
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// until bug 960465 lands. It only really needs to be correct for
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// things we run animations on (elements and ::before and ::after
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// pseudo-elements).
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already_AddRefed<nsStyleContext>
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ReparentStyleContext(nsStyleContext* aStyleContext,
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nsStyleContext* aNewParentContext,
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mozilla::dom::Element* aElement,
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mozilla::dom::Element* aElementOrPseudoElement);
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// Test if style is dependent on a document state.
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bool HasDocumentStateDependentStyle(nsPresContext* aPresContext,
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nsIContent* aContent,
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mozilla::EventStates aStateMask);
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// Test if style is dependent on content state
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nsRestyleHint HasStateDependentStyle(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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mozilla::EventStates aStateMask);
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nsRestyleHint HasStateDependentStyle(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType,
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mozilla::dom::Element* aPseudoElement,
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mozilla::EventStates aStateMask);
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// Test if style is dependent on the presence of an attribute.
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nsRestyleHint HasAttributeDependentStyle(nsPresContext* aPresContext,
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mozilla::dom::Element* aElement,
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nsIAtom* aAttribute,
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int32_t aModType,
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bool aAttrHasChanged);
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/*
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* Do any processing that needs to happen as a result of a change in
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* the characteristics of the medium, and return whether style rules
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* may have changed as a result.
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*/
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bool MediumFeaturesChanged(nsPresContext* aPresContext);
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// APIs for registering objects that can supply additional
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// rules during processing.
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void SetBindingManager(nsBindingManager* aBindingManager)
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{
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mBindingManager = aBindingManager;
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}
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// The "origins" of the CSS cascade, from lowest precedence to
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// highest (for non-!important rules).
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enum sheetType {
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eAgentSheet, // CSS
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eUserSheet, // CSS
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ePresHintSheet,
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eSVGAttrAnimationSheet,
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eDocSheet, // CSS
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eScopedDocSheet,
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eStyleAttrSheet,
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eOverrideSheet, // CSS
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eAnimationSheet,
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eTransitionSheet,
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eSheetTypeCount
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// be sure to keep the number of bits in |mDirty| below and in
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// NS_RULE_NODE_LEVEL_MASK updated when changing the number of sheet
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// types
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};
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// APIs to manipulate the style sheet lists. The sheets in each
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// list are stored with the most significant sheet last.
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nsresult AppendStyleSheet(sheetType aType, nsIStyleSheet *aSheet);
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nsresult PrependStyleSheet(sheetType aType, nsIStyleSheet *aSheet);
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nsresult RemoveStyleSheet(sheetType aType, nsIStyleSheet *aSheet);
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nsresult ReplaceSheets(sheetType aType,
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const nsCOMArray<nsIStyleSheet> &aNewSheets);
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nsresult InsertStyleSheetBefore(sheetType aType, nsIStyleSheet *aNewSheet,
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nsIStyleSheet *aReferenceSheet);
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nsresult DirtyRuleProcessors(sheetType aType);
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// Enable/Disable entire author style level (Doc, ScopedDoc & PresHint levels)
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bool GetAuthorStyleDisabled();
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nsresult SetAuthorStyleDisabled(bool aStyleDisabled);
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int32_t SheetCount(sheetType aType) const {
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return mSheets[aType].Count();
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}
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nsIStyleSheet* StyleSheetAt(sheetType aType, int32_t aIndex) const {
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return mSheets[aType].ObjectAt(aIndex);
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}
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nsresult RemoveDocStyleSheet(nsIStyleSheet* aSheet);
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nsresult AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument);
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void BeginUpdate();
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nsresult EndUpdate();
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// Methods for reconstructing the tree; BeginReconstruct basically moves the
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// old rule tree root and style context roots out of the way,
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// and EndReconstruct destroys the old rule tree when we're done
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nsresult BeginReconstruct();
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// Note: EndReconstruct should not be called if BeginReconstruct fails
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void EndReconstruct();
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bool IsInRuleTreeReconstruct() const {
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return mInReconstruct;
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}
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// Let the style set know that a particular sheet is the quirks sheet. This
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// sheet must already have been added to the UA sheets. The pointer must not
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// be null. This should only be called once for a given style set.
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void SetQuirkStyleSheet(nsIStyleSheet* aQuirkStyleSheet);
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// Return whether the rule tree has cached data such that we need to
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// do dynamic change handling for changes that change the results of
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// media queries or require rebuilding all style data.
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// We don't care whether we have cached rule processors or whether
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// they have cached rule cascades; getting the rule cascades again in
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// order to do rule matching will get the correct rule cascade.
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bool HasCachedStyleData() const {
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return (mRuleTree && mRuleTree->TreeHasCachedData()) || !mRoots.IsEmpty();
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}
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// Notify the style set that a rulenode is no longer in use, or was
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// just created and is not in use yet.
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void RuleNodeUnused() {
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++mUnusedRuleNodeCount;
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}
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// Notify the style set that a rulenode that wasn't in use now is
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void RuleNodeInUse() {
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--mUnusedRuleNodeCount;
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}
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mozilla::CSSStyleSheet::EnsureUniqueInnerResult EnsureUniqueInnerOnCSSSheets();
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nsIStyleRule* InitialStyleRule();
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private:
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nsStyleSet(const nsStyleSet& aCopy) MOZ_DELETE;
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nsStyleSet& operator=(const nsStyleSet& aCopy) MOZ_DELETE;
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// Run mark-and-sweep GC on mRuleTree and mOldRuleTrees, based on mRoots.
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void GCRuleTrees();
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// Update the rule processor list after a change to the style sheet list.
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nsresult GatherRuleProcessors(sheetType aType);
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void AddImportantRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode,
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nsRuleWalker* aRuleWalker);
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// Move aRuleWalker forward by the appropriate rule if we need to add
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// a rule due to property restrictions on pseudo-elements.
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void WalkRestrictionRule(nsCSSPseudoElements::Type aPseudoType,
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nsRuleWalker* aRuleWalker);
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void WalkDisableTextZoomRule(mozilla::dom::Element* aElement,
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nsRuleWalker* aRuleWalker);
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#ifdef DEBUG
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// Just like AddImportantRules except it doesn't actually add anything; it
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// just asserts that there are no important rules between aCurrLevelNode and
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// aLastPrevLevelNode.
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void AssertNoImportantRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode);
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// Just like AddImportantRules except it doesn't actually add anything; it
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// just asserts that there are no CSS rules between aCurrLevelNode and
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// aLastPrevLevelNode. Mostly useful for the preshint level.
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void AssertNoCSSRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode);
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#endif
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// Enumerate the rules in a way that cares about the order of the
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// rules.
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// aElement is the element the rules are for. It might be null. aData
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// is the closure to pass to aCollectorFunc. If aContent is not null,
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// aData must be a RuleProcessorData*
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void FileRules(nsIStyleRuleProcessor::EnumFunc aCollectorFunc,
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RuleProcessorData* aData, mozilla::dom::Element* aElement,
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nsRuleWalker* aRuleWalker);
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// Enumerate all the rules in a way that doesn't care about the order
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// of the rules and break out if the enumeration is halted.
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void WalkRuleProcessors(nsIStyleRuleProcessor::EnumFunc aFunc,
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ElementDependentRuleProcessorData* aData,
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bool aWalkAllXBLStylesheets);
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// Helper for ResolveStyleWithReplacement
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nsRuleNode* RuleNodeWithReplacement(mozilla::dom::Element* aElement,
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nsRuleNode* aOldRuleNode,
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nsCSSPseudoElements::Type aPseudoType,
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nsRestyleHint aReplacements);
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/**
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* Bit-flags that can be passed to GetContext() in its parameter 'aFlags'.
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*/
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enum {
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eNoFlags = 0,
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eIsLink = 1 << 0,
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eIsVisitedLink = 1 << 1,
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eDoAnimation = 1 << 2,
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// Indicates that we should skip the flex/grid item specific chunk of
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// ApplyStyleFixups(). This is useful if our parent has "display: flex"
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// or "display: grid" but we can tell we're not going to honor that (e.g. if
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// it's the outer frame of a button widget, and we're the inline frame for
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// the button's label).
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eSkipParentDisplayBasedStyleFixup = 1 << 3
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};
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already_AddRefed<nsStyleContext>
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GetContext(nsStyleContext* aParentContext,
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nsRuleNode* aRuleNode,
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nsRuleNode* aVisitedRuleNode,
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nsIAtom* aPseudoTag,
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nsCSSPseudoElements::Type aPseudoType,
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mozilla::dom::Element* aElementForAnimation,
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uint32_t aFlags);
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nsPresContext* PresContext() { return mRuleTree->PresContext(); }
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// The sheets in each array in mSheets are stored with the most significant
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// sheet last.
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// The arrays for ePresHintSheet, eStyleAttrSheet, eTransitionSheet,
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// and eAnimationSheet are always empty. (FIXME: We should reduce
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// the storage needed for them.)
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nsCOMArray<nsIStyleSheet> mSheets[eSheetTypeCount];
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// mRuleProcessors[eScopedDocSheet] is always null; rule processors
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// for scoped style sheets are stored in mScopedDocSheetRuleProcessors.
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nsCOMPtr<nsIStyleRuleProcessor> mRuleProcessors[eSheetTypeCount];
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// Rule processors for HTML5 scoped style sheets, one per scope.
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nsTArray<nsCOMPtr<nsIStyleRuleProcessor> > mScopedDocSheetRuleProcessors;
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// cached instance for enabling/disabling
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nsCOMPtr<nsIStyleSheet> mQuirkStyleSheet;
|
|
|
|
nsRefPtr<nsBindingManager> mBindingManager;
|
|
|
|
nsRuleNode* mRuleTree; // This is the root of our rule tree. It is a
|
|
// lexicographic tree of matched rules that style
|
|
// contexts use to look up properties.
|
|
|
|
uint16_t mBatching;
|
|
|
|
unsigned mInShutdown : 1;
|
|
unsigned mAuthorStyleDisabled: 1;
|
|
unsigned mInReconstruct : 1;
|
|
unsigned mInitFontFeatureValuesLookup : 1;
|
|
unsigned mDirty : 10; // one dirty bit is used per sheet type
|
|
|
|
uint32_t mUnusedRuleNodeCount; // used to batch rule node GC
|
|
nsTArray<nsStyleContext*> mRoots; // style contexts with no parent
|
|
|
|
// Empty style rules to force things that restrict which properties
|
|
// apply into different branches of the rule tree.
|
|
nsRefPtr<nsEmptyStyleRule> mFirstLineRule, mFirstLetterRule, mPlaceholderRule;
|
|
|
|
// Style rule which sets all properties to their initial values for
|
|
// determining when context-sensitive values are in use.
|
|
nsRefPtr<nsInitialStyleRule> mInitialStyleRule;
|
|
|
|
// Style rule that sets the internal -x-text-zoom property on
|
|
// <svg:text> elements to disable the effect of text zooming.
|
|
nsRefPtr<nsDisableTextZoomStyleRule> mDisableTextZoomStyleRule;
|
|
|
|
// Old rule trees, which should only be non-empty between
|
|
// BeginReconstruct and EndReconstruct, but in case of bugs that cause
|
|
// style contexts to exist too long, may last longer.
|
|
nsTArray<nsRuleNode*> mOldRuleTrees;
|
|
|
|
// whether font feature values lookup object needs initialization
|
|
nsRefPtr<gfxFontFeatureValueSet> mFontFeatureValuesLookup;
|
|
};
|
|
|
|
#ifdef MOZILLA_INTERNAL_API
|
|
inline
|
|
void nsRuleNode::AddRef()
|
|
{
|
|
if (mRefCnt++ == 0 && !IsRoot()) {
|
|
mPresContext->StyleSet()->RuleNodeInUse();
|
|
}
|
|
}
|
|
|
|
inline
|
|
void nsRuleNode::Release()
|
|
{
|
|
if (--mRefCnt == 0 && !IsRoot()) {
|
|
mPresContext->StyleSet()->RuleNodeUnused();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#endif
|