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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /layout/generic/nsInlineFrame.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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diff --git a/layout/generic/nsInlineFrame.h b/layout/generic/nsInlineFrame.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* rendering object for CSS display:inline objects */
+
+#ifndef nsInlineFrame_h___
+#define nsInlineFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsContainerFrame.h"
+
+class nsLineLayout;
+
+/**
+ * Inline frame class.
+ *
+ * This class manages a list of child frames that are inline frames. Working with
+ * nsLineLayout, the class will reflow and place inline frames on a line.
+ */
+class nsInlineFrame : public nsContainerFrame
+{
+public:
+ NS_DECL_QUERYFRAME_TARGET(nsInlineFrame)
+ NS_DECL_QUERYFRAME
+ NS_DECL_FRAMEARENA_HELPERS
+
+ friend nsInlineFrame* NS_NewInlineFrame(nsIPresShell* aPresShell,
+ nsStyleContext* aContext);
+
+ // nsIFrame overrides
+ virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect,
+ const nsDisplayListSet& aLists) override;
+
+#ifdef ACCESSIBILITY
+ virtual mozilla::a11y::AccType AccessibleType() override;
+#endif
+
+#ifdef DEBUG_FRAME_DUMP
+ virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+ virtual nsIAtom* GetType() const override;
+
+ virtual bool IsFrameOfType(uint32_t aFlags) const override
+ {
+ if (aFlags & eSupportsCSSTransforms) {
+ return false;
+ }
+ return nsContainerFrame::IsFrameOfType(aFlags &
+ ~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
+ }
+
+ virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) override;
+ virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) override;
+
+ virtual bool IsEmpty() override;
+ virtual bool IsSelfEmpty() override;
+
+ virtual FrameSearchResult PeekOffsetCharacter(bool aForward, int32_t* aOffset,
+ bool aRespectClusters = true) override;
+
+ virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+ virtual nsresult StealFrame(nsIFrame* aChild) override;
+
+ // nsIHTMLReflow overrides
+ virtual void AddInlineMinISize(nsRenderingContext *aRenderingContext,
+ InlineMinISizeData *aData) override;
+ virtual void AddInlinePrefISize(nsRenderingContext *aRenderingContext,
+ InlinePrefISizeData *aData) override;
+ virtual mozilla::LogicalSize
+ ComputeSize(nsRenderingContext *aRenderingContext,
+ mozilla::WritingMode aWritingMode,
+ const mozilla::LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const mozilla::LogicalSize& aMargin,
+ const mozilla::LogicalSize& aBorder,
+ const mozilla::LogicalSize& aPadding,
+ ComputeSizeFlags aFlags) override;
+ virtual nsRect ComputeTightBounds(DrawTarget* aDrawTarget) const override;
+ virtual void Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) override;
+
+ virtual nsresult AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType) override;
+
+ virtual bool CanContinueTextRun() const override;
+
+ virtual void PullOverflowsFromPrevInFlow() override;
+ virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const override;
+ virtual bool DrainSelfOverflowList() override;
+
+ /**
+ * Return true if the frame is first visual frame or first continuation
+ */
+ bool IsFirst() const {
+ // If the frame's bidi visual state is set, return is-first state
+ // else return true if it's the first continuation.
+ return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
+ ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_FIRST)
+ : (!GetPrevInFlow());
+ }
+
+ /**
+ * Return true if the frame is last visual frame or last continuation.
+ */
+ bool IsLast() const {
+ // If the frame's bidi visual state is set, return is-last state
+ // else return true if it's the last continuation.
+ return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
+ ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LAST)
+ : (!GetNextInFlow());
+ }
+
+protected:
+ // Additional reflow state used during our reflow methods
+ struct InlineReflowInput {
+ nsIFrame* mPrevFrame;
+ nsInlineFrame* mNextInFlow;
+ nsIFrame* mLineContainer;
+ nsLineLayout* mLineLayout;
+ bool mSetParentPointer; // when reflowing child frame first set its
+ // parent frame pointer
+
+ InlineReflowInput() {
+ mPrevFrame = nullptr;
+ mNextInFlow = nullptr;
+ mLineContainer = nullptr;
+ mLineLayout = nullptr;
+ mSetParentPointer = false;
+ }
+ };
+
+ explicit nsInlineFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
+
+ virtual LogicalSides GetLogicalSkipSides(const ReflowInput* aReflowInput = nullptr) const override;
+
+ void ReflowFrames(nsPresContext* aPresContext,
+ const ReflowInput& aReflowInput,
+ InlineReflowInput& rs,
+ ReflowOutput& aMetrics,
+ nsReflowStatus& aStatus);
+
+ void ReflowInlineFrame(nsPresContext* aPresContext,
+ const ReflowInput& aReflowInput,
+ InlineReflowInput& rs,
+ nsIFrame* aFrame,
+ nsReflowStatus& aStatus);
+
+ /**
+ * Reparent floats whose placeholders are inline descendants of aFrame from
+ * whatever block they're currently parented by to aOurBlock.
+ * @param aReparentSiblings if this is true, we follow aFrame's
+ * GetNextSibling chain reparenting them all
+ */
+ void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
+ bool aReparentSiblings);
+
+ virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
+ InlineReflowInput& rs,
+ bool* aIsComplete);
+
+ virtual void PushFrames(nsPresContext* aPresContext,
+ nsIFrame* aFromChild,
+ nsIFrame* aPrevSibling,
+ InlineReflowInput& aState);
+
+private:
+ // Helper method for DrainSelfOverflowList() to deal with lazy parenting
+ // (which we only do for nsInlineFrame, not nsFirstLineFrame).
+ enum DrainFlags {
+ eDontReparentFrames = 1, // skip reparenting the overflow list frames
+ eInFirstLine = 2, // the request is for an inline descendant of a nsFirstLineFrame
+ eForDestroy = 4, // the request is from DestroyFrom; in this case we do the
+ // minimal work required since the frame is about to be
+ // destroyed (just fixup parent pointers)
+ };
+ /**
+ * Move any frames on our overflow list to the end of our principal list.
+ * @param aFlags one or more of the above DrainFlags
+ * @param aLineContainer the nearest line container ancestor
+ * @return true if there were any overflow frames
+ */
+ bool DrainSelfOverflowListInternal(DrainFlags aFlags,
+ nsIFrame* aLineContainer);
+protected:
+ nscoord mBaseline;
+};
+
+//----------------------------------------------------------------------
+
+/**
+ * Variation on inline-frame used to manage lines for line layout in
+ * special situations (:first-line style in particular).
+ */
+class nsFirstLineFrame final : public nsInlineFrame {
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ friend nsFirstLineFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell,
+ nsStyleContext* aContext);
+
+#ifdef DEBUG_FRAME_DUMP
+ virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+ virtual nsIAtom* GetType() const override;
+ virtual void Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) override;
+
+ virtual void Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) override;
+ virtual void PullOverflowsFromPrevInFlow() override;
+ virtual bool DrainSelfOverflowList() override;
+
+protected:
+ explicit nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
+
+ virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
+ InlineReflowInput& rs,
+ bool* aIsComplete) override;
+};
+
+#endif /* nsInlineFrame_h___ */