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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
};
/**
* 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___ */
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