1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/nsInlineFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,214 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* rendering object for CSS display:inline objects */
1.10 +
1.11 +#ifndef nsInlineFrame_h___
1.12 +#define nsInlineFrame_h___
1.13 +
1.14 +#include "mozilla/Attributes.h"
1.15 +#include "nsContainerFrame.h"
1.16 +
1.17 +class nsLineLayout;
1.18 +
1.19 +typedef nsContainerFrame nsInlineFrameBase;
1.20 +
1.21 +/**
1.22 + * Inline frame class.
1.23 + *
1.24 + * This class manages a list of child frames that are inline frames. Working with
1.25 + * nsLineLayout, the class will reflow and place inline frames on a line.
1.26 + */
1.27 +class nsInlineFrame : public nsInlineFrameBase
1.28 +{
1.29 +public:
1.30 + NS_DECL_QUERYFRAME_TARGET(nsInlineFrame)
1.31 + NS_DECL_QUERYFRAME
1.32 + NS_DECL_FRAMEARENA_HELPERS
1.33 +
1.34 + friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.35 +
1.36 + // nsIFrame overrides
1.37 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.38 + const nsRect& aDirtyRect,
1.39 + const nsDisplayListSet& aLists) MOZ_OVERRIDE;
1.40 +
1.41 +#ifdef ACCESSIBILITY
1.42 + virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
1.43 +#endif
1.44 +
1.45 +#ifdef DEBUG_FRAME_DUMP
1.46 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
1.47 +#endif
1.48 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.49 +
1.50 + virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
1.51 + {
1.52 + if (aFlags & eSupportsCSSTransforms) {
1.53 + return false;
1.54 + }
1.55 + return nsContainerFrame::IsFrameOfType(aFlags &
1.56 + ~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
1.57 + }
1.58 +
1.59 + virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
1.60 + virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
1.61 +
1.62 + virtual bool IsEmpty() MOZ_OVERRIDE;
1.63 + virtual bool IsSelfEmpty() MOZ_OVERRIDE;
1.64 +
1.65 + virtual FrameSearchResult PeekOffsetCharacter(bool aForward, int32_t* aOffset,
1.66 + bool aRespectClusters = true) MOZ_OVERRIDE;
1.67 +
1.68 + // nsIHTMLReflow overrides
1.69 + virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
1.70 + InlineMinWidthData *aData) MOZ_OVERRIDE;
1.71 + virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
1.72 + InlinePrefWidthData *aData) MOZ_OVERRIDE;
1.73 + virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
1.74 + nsSize aCBSize, nscoord aAvailableWidth,
1.75 + nsSize aMargin, nsSize aBorder, nsSize aPadding,
1.76 + uint32_t aFlags) MOZ_OVERRIDE;
1.77 + virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
1.78 + virtual nsresult Reflow(nsPresContext* aPresContext,
1.79 + nsHTMLReflowMetrics& aDesiredSize,
1.80 + const nsHTMLReflowState& aReflowState,
1.81 + nsReflowStatus& aStatus) MOZ_OVERRIDE;
1.82 +
1.83 + virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
1.84 +
1.85 + virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
1.86 + virtual nscoord GetBaseline() const MOZ_OVERRIDE;
1.87 + virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
1.88 +
1.89 + /**
1.90 + * Return true if the frame is first visual frame or first continuation
1.91 + */
1.92 + bool IsFirst() const {
1.93 + // If the frame's bidi visual state is set, return is-first state
1.94 + // else return true if it's the first continuation.
1.95 + return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
1.96 + ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_FIRST)
1.97 + : (!GetPrevInFlow());
1.98 + }
1.99 +
1.100 + /**
1.101 + * Return true if the frame is last visual frame or last continuation.
1.102 + */
1.103 + bool IsLast() const {
1.104 + // If the frame's bidi visual state is set, return is-last state
1.105 + // else return true if it's the last continuation.
1.106 + return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
1.107 + ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LAST)
1.108 + : (!GetNextInFlow());
1.109 + }
1.110 +
1.111 +protected:
1.112 + // Additional reflow state used during our reflow methods
1.113 + struct InlineReflowState {
1.114 + nsIFrame* mPrevFrame;
1.115 + nsInlineFrame* mNextInFlow;
1.116 + nsIFrame* mLineContainer;
1.117 + nsLineLayout* mLineLayout;
1.118 + bool mSetParentPointer; // when reflowing child frame first set its
1.119 + // parent frame pointer
1.120 +
1.121 + InlineReflowState() {
1.122 + mPrevFrame = nullptr;
1.123 + mNextInFlow = nullptr;
1.124 + mLineContainer = nullptr;
1.125 + mLineLayout = nullptr;
1.126 + mSetParentPointer = false;
1.127 + }
1.128 + };
1.129 +
1.130 + nsInlineFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
1.131 +
1.132 + virtual int GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
1.133 +
1.134 + nsresult ReflowFrames(nsPresContext* aPresContext,
1.135 + const nsHTMLReflowState& aReflowState,
1.136 + InlineReflowState& rs,
1.137 + nsHTMLReflowMetrics& aMetrics,
1.138 + nsReflowStatus& aStatus);
1.139 +
1.140 + nsresult ReflowInlineFrame(nsPresContext* aPresContext,
1.141 + const nsHTMLReflowState& aReflowState,
1.142 + InlineReflowState& rs,
1.143 + nsIFrame* aFrame,
1.144 + nsReflowStatus& aStatus);
1.145 +
1.146 + /**
1.147 + * Reparent floats whose placeholders are inline descendants of aFrame from
1.148 + * whatever block they're currently parented by to aOurBlock.
1.149 + * @param aReparentSiblings if this is true, we follow aFrame's
1.150 + * GetNextSibling chain reparenting them all
1.151 + */
1.152 + void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
1.153 + bool aReparentSiblings);
1.154 +
1.155 + virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
1.156 + InlineReflowState& rs,
1.157 + bool* aIsComplete);
1.158 +
1.159 + virtual void PushFrames(nsPresContext* aPresContext,
1.160 + nsIFrame* aFromChild,
1.161 + nsIFrame* aPrevSibling,
1.162 + InlineReflowState& aState);
1.163 +
1.164 +private:
1.165 + // Helper method for DrainSelfOverflowList() to deal with lazy parenting
1.166 + // (which we only do for nsInlineFrame, not nsFirstLineFrame).
1.167 + enum DrainFlags {
1.168 + eDontReparentFrames = 1, // skip reparenting the overflow list frames
1.169 + eInFirstLine = 2, // the request is for an inline descendant of a nsFirstLineFrame
1.170 + };
1.171 + /**
1.172 + * Move any frames on our overflow list to the end of our principal list.
1.173 + * @param aFlags one or more of the above DrainFlags
1.174 + * @param aLineContainer the nearest line container ancestor
1.175 + * @return true if there were any overflow frames
1.176 + */
1.177 + bool DrainSelfOverflowListInternal(DrainFlags aFlags,
1.178 + nsIFrame* aLineContainer);
1.179 +protected:
1.180 + nscoord mBaseline;
1.181 +};
1.182 +
1.183 +//----------------------------------------------------------------------
1.184 +
1.185 +/**
1.186 + * Variation on inline-frame used to manage lines for line layout in
1.187 + * special situations (:first-line style in particular).
1.188 + */
1.189 +class nsFirstLineFrame MOZ_FINAL : public nsInlineFrame {
1.190 +public:
1.191 + NS_DECL_FRAMEARENA_HELPERS
1.192 +
1.193 + friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.194 +
1.195 +#ifdef DEBUG_FRAME_DUMP
1.196 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
1.197 +#endif
1.198 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.199 + virtual nsresult Reflow(nsPresContext* aPresContext,
1.200 + nsHTMLReflowMetrics& aDesiredSize,
1.201 + const nsHTMLReflowState& aReflowState,
1.202 + nsReflowStatus& aStatus) MOZ_OVERRIDE;
1.203 +
1.204 + virtual void Init(nsIContent* aContent, nsIFrame* aParent,
1.205 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.206 + virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
1.207 + virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
1.208 +
1.209 +protected:
1.210 + nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
1.211 +
1.212 + virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
1.213 + InlineReflowState& rs,
1.214 + bool* aIsComplete) MOZ_OVERRIDE;
1.215 +};
1.216 +
1.217 +#endif /* nsInlineFrame_h___ */
