зеркало из https://github.com/mozilla/gecko-dev.git
226 строки
8.4 KiB
C++
226 строки
8.4 KiB
C++
/* -*- 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;
|
|
|
|
/** In Bidi left (or right) margin/padding/border should be applied to left
|
|
* (or right) most frame (or a continuation frame).
|
|
* This state value shows if this frame is left (or right) most continuation
|
|
* or not.
|
|
*/
|
|
#define NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET NS_FRAME_STATE_BIT(21)
|
|
|
|
#define NS_INLINE_FRAME_BIDI_VISUAL_IS_LEFT_MOST NS_FRAME_STATE_BIT(22)
|
|
|
|
#define NS_INLINE_FRAME_BIDI_VISUAL_IS_RIGHT_MOST NS_FRAME_STATE_BIT(23)
|
|
|
|
typedef nsContainerFrame nsInlineFrameBase;
|
|
|
|
/**
|
|
* 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 nsInlineFrameBase
|
|
{
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsInlineFrame)
|
|
NS_DECL_QUERYFRAME
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
|
|
// nsIFrame overrides
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
|
|
|
|
#ifdef ACCESSIBILITY
|
|
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
|
|
#endif
|
|
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
|
|
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
|
|
{
|
|
if (aFlags & eSupportsCSSTransforms) {
|
|
return false;
|
|
}
|
|
return nsContainerFrame::IsFrameOfType(aFlags &
|
|
~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
|
|
}
|
|
|
|
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
|
|
virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
|
|
|
|
virtual bool IsEmpty() MOZ_OVERRIDE;
|
|
virtual bool IsSelfEmpty() MOZ_OVERRIDE;
|
|
|
|
virtual bool PeekOffsetCharacter(bool aForward, int32_t* aOffset,
|
|
bool aRespectClusters = true) MOZ_OVERRIDE;
|
|
|
|
// nsIHTMLReflow overrides
|
|
virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
|
|
InlineMinWidthData *aData) MOZ_OVERRIDE;
|
|
virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
|
|
InlinePrefWidthData *aData) MOZ_OVERRIDE;
|
|
virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding,
|
|
uint32_t aFlags) MOZ_OVERRIDE;
|
|
virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus) MOZ_OVERRIDE;
|
|
|
|
virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
|
|
|
|
virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
|
|
virtual nscoord GetBaseline() const MOZ_OVERRIDE;
|
|
virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
|
|
|
|
/**
|
|
* Return true if the frame is leftmost frame or continuation.
|
|
*/
|
|
bool IsLeftMost() const {
|
|
// If the frame's bidi visual state is set, return is-leftmost 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_LEFT_MOST)
|
|
: (!GetPrevInFlow());
|
|
}
|
|
|
|
/**
|
|
* Return true if the frame is rightmost frame or continuation.
|
|
*/
|
|
bool IsRightMost() const {
|
|
// If the frame's bidi visual state is set, return is-rightmost 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_RIGHT_MOST)
|
|
: (!GetNextInFlow());
|
|
}
|
|
|
|
protected:
|
|
// Additional reflow state used during our reflow methods
|
|
struct InlineReflowState {
|
|
nsIFrame* mPrevFrame;
|
|
nsInlineFrame* mNextInFlow;
|
|
nsIFrame* mLineContainer;
|
|
nsLineLayout* mLineLayout;
|
|
bool mSetParentPointer; // when reflowing child frame first set its
|
|
// parent frame pointer
|
|
|
|
InlineReflowState() {
|
|
mPrevFrame = nullptr;
|
|
mNextInFlow = nullptr;
|
|
mLineContainer = nullptr;
|
|
mLineLayout = nullptr;
|
|
mSetParentPointer = false;
|
|
}
|
|
};
|
|
|
|
nsInlineFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
|
|
|
|
virtual int GetSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
|
|
|
|
nsresult ReflowFrames(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
InlineReflowState& rs,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nsReflowStatus& aStatus);
|
|
|
|
nsresult ReflowInlineFrame(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
InlineReflowState& 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,
|
|
InlineReflowState& rs,
|
|
bool* aIsComplete);
|
|
|
|
virtual void PushFrames(nsPresContext* aPresContext,
|
|
nsIFrame* aFromChild,
|
|
nsIFrame* aPrevSibling,
|
|
InlineReflowState& 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 MOZ_FINAL : public nsInlineFrame {
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
|
|
#endif
|
|
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus) MOZ_OVERRIDE;
|
|
|
|
virtual void Init(nsIContent* aContent, nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
|
|
virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
|
|
virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
|
|
|
|
protected:
|
|
nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
|
|
|
|
virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
|
|
InlineReflowState& rs,
|
|
bool* aIsComplete) MOZ_OVERRIDE;
|
|
};
|
|
|
|
#endif /* nsInlineFrame_h___ */
|