зеркало из https://github.com/mozilla/gecko-dev.git
244 строки
9.0 KiB
C++
244 строки
9.0 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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/* rendering object for CSS display:inline objects */
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#ifndef nsInlineFrame_h___
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#define nsInlineFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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class nsLineLayout;
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/**
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* Inline frame class.
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*
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* This class manages a list of child frames that are inline frames. Working with
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* nsLineLayout, the class will reflow and place inline frames on a line.
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*/
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class nsInlineFrame : public nsContainerFrame
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{
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsInlineFrame)
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friend nsInlineFrame* NS_NewInlineFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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// nsIFrame overrides
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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if (aFlags & eSupportsCSSTransforms) {
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return false;
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}
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
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}
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virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) override;
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virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) override;
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virtual bool IsEmpty() override;
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virtual bool IsSelfEmpty() override;
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virtual FrameSearchResult
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PeekOffsetCharacter(bool aForward, int32_t* aOffset,
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PeekOffsetCharacterOptions aOptions =
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PeekOffsetCharacterOptions()) override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual nsresult StealFrame(nsIFrame* aChild) override;
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// nsIHTMLReflow overrides
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virtual void AddInlineMinISize(gfxContext *aRenderingContext,
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InlineMinISizeData *aData) override;
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virtual void AddInlinePrefISize(gfxContext *aRenderingContext,
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InlinePrefISizeData *aData) override;
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virtual mozilla::LogicalSize
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ComputeSize(gfxContext *aRenderingContext,
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mozilla::WritingMode aWritingMode,
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const mozilla::LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorder,
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const mozilla::LogicalSize& aPadding,
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ComputeSizeFlags aFlags) override;
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virtual nsRect ComputeTightBounds(DrawTarget* aDrawTarget) const override;
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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virtual bool CanContinueTextRun() const override;
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virtual void PullOverflowsFromPrevInFlow() override;
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virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const override;
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virtual bool DrainSelfOverflowList() override;
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/**
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* Return true if the frame is first visual frame or first continuation
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*/
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bool IsFirst() const {
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// If the frame's bidi visual state is set, return is-first state
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// else return true if it's the first continuation.
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return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
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? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_FIRST)
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: (!GetPrevInFlow());
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}
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/**
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* Return true if the frame is last visual frame or last continuation.
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*/
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bool IsLast() const {
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// If the frame's bidi visual state is set, return is-last state
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// else return true if it's the last continuation.
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return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
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? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LAST)
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: (!GetNextInFlow());
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}
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// Restyles the block wrappers around our non-inline-outside kids.
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// This will only be called when such wrappers in fact exist.
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void UpdateStyleOfOwnedAnonBoxesForIBSplit(
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mozilla::ServoRestyleState& aRestyleState);
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protected:
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// Additional reflow state used during our reflow methods
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struct InlineReflowInput {
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nsIFrame* mPrevFrame;
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nsInlineFrame* mNextInFlow;
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nsIFrame* mLineContainer;
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nsLineLayout* mLineLayout;
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bool mSetParentPointer; // when reflowing child frame first set its
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// parent frame pointer
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InlineReflowInput() {
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mPrevFrame = nullptr;
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mNextInFlow = nullptr;
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mLineContainer = nullptr;
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mLineLayout = nullptr;
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mSetParentPointer = false;
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}
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};
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nsInlineFrame(nsStyleContext* aContext, ClassID aID)
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: nsContainerFrame(aContext, aID)
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, mBaseline(NS_INTRINSIC_WIDTH_UNKNOWN)
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{}
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virtual LogicalSides GetLogicalSkipSides(const ReflowInput* aReflowInput = nullptr) const override;
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void ReflowFrames(nsPresContext* aPresContext,
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const ReflowInput& aReflowInput,
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InlineReflowInput& rs,
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ReflowOutput& aMetrics,
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nsReflowStatus& aStatus);
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void ReflowInlineFrame(nsPresContext* aPresContext,
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const ReflowInput& aReflowInput,
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InlineReflowInput& rs,
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nsIFrame* aFrame,
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nsReflowStatus& aStatus);
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/**
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* Reparent floats whose placeholders are inline descendants of aFrame from
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* whatever block they're currently parented by to aOurBlock.
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* @param aReparentSiblings if this is true, we follow aFrame's
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* GetNextSibling chain reparenting them all
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*/
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void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
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bool aReparentSiblings);
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virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
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InlineReflowInput& rs,
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bool* aIsComplete);
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virtual void PushFrames(nsPresContext* aPresContext,
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nsIFrame* aFromChild,
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nsIFrame* aPrevSibling,
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InlineReflowInput& aState);
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private:
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explicit nsInlineFrame(nsStyleContext* aContext)
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: nsInlineFrame(aContext, kClassID)
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{}
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// Helper method for DrainSelfOverflowList() to deal with lazy parenting
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// (which we only do for nsInlineFrame, not nsFirstLineFrame).
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enum DrainFlags {
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eDontReparentFrames = 1, // skip reparenting the overflow list frames
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eInFirstLine = 2, // the request is for an inline descendant of a nsFirstLineFrame
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eForDestroy = 4, // the request is from DestroyFrom; in this case we do the
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// minimal work required since the frame is about to be
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// destroyed (just fixup parent pointers)
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};
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/**
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* Move any frames on our overflow list to the end of our principal list.
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* @param aFlags one or more of the above DrainFlags
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* @param aLineContainer the nearest line container ancestor
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* @return true if there were any overflow frames
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*/
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bool DrainSelfOverflowListInternal(DrainFlags aFlags,
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nsIFrame* aLineContainer);
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protected:
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nscoord mBaseline;
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};
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//----------------------------------------------------------------------
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/**
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* Variation on inline-frame used to manage lines for line layout in
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* special situations (:first-line style in particular).
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*/
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class nsFirstLineFrame final : public nsInlineFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsFirstLineFrame)
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friend nsFirstLineFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual void PullOverflowsFromPrevInFlow() override;
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virtual bool DrainSelfOverflowList() override;
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protected:
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explicit nsFirstLineFrame(nsStyleContext* aContext)
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: nsInlineFrame(aContext, kClassID)
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{}
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virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
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InlineReflowInput& rs,
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bool* aIsComplete) override;
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};
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#endif /* nsInlineFrame_h___ */
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