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layout/generic/nsInlineFrame.h@b8a032363ba2 (annotated)

layout/generic/nsInlineFrame.h

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0 2 /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0 3 * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0 5
michael@0 6 /* rendering object for CSS display:inline objects */
michael@0 7
michael@0 8 #ifndef nsInlineFrame_h___
michael@0 9 #define nsInlineFrame_h___
michael@0 10
michael@0 11 #include "mozilla/Attributes.h"
michael@0 12 #include "nsContainerFrame.h"
michael@0 13
michael@0 14 class nsLineLayout;
michael@0 15
michael@0 16 typedef nsContainerFrame nsInlineFrameBase;
michael@0 17
michael@0 18 /**
michael@0 19 * Inline frame class.
michael@0 20 *
michael@0 21 * This class manages a list of child frames that are inline frames. Working with
michael@0 22 * nsLineLayout, the class will reflow and place inline frames on a line.
michael@0 23 */
michael@0 24 class nsInlineFrame : public nsInlineFrameBase
michael@0 25 {
michael@0 26 public:
michael@0 27 NS_DECL_QUERYFRAME_TARGET(nsInlineFrame)
michael@0 28 NS_DECL_QUERYFRAME
michael@0 29 NS_DECL_FRAMEARENA_HELPERS
michael@0 30
michael@0 31 friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0 32
michael@0 33 // nsIFrame overrides
michael@0 34 virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
michael@0 35 const nsRect& aDirtyRect,
michael@0 36 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
michael@0 37
michael@0 38 #ifdef ACCESSIBILITY
michael@0 39 virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
michael@0 40 #endif
michael@0 41
michael@0 42 #ifdef DEBUG_FRAME_DUMP
michael@0 43 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
michael@0 44 #endif
michael@0 45 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
michael@0 46
michael@0 47 virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
michael@0 48 {
michael@0 49 if (aFlags & eSupportsCSSTransforms) {
michael@0 50 return false;
michael@0 51 }
michael@0 52 return nsContainerFrame::IsFrameOfType(aFlags &
michael@0 53 ~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
michael@0 54 }
michael@0 55
michael@0 56 virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
michael@0 57 virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
michael@0 58
michael@0 59 virtual bool IsEmpty() MOZ_OVERRIDE;
michael@0 60 virtual bool IsSelfEmpty() MOZ_OVERRIDE;
michael@0 61
michael@0 62 virtual FrameSearchResult PeekOffsetCharacter(bool aForward, int32_t* aOffset,
michael@0 63 bool aRespectClusters = true) MOZ_OVERRIDE;
michael@0 64
michael@0 65 // nsIHTMLReflow overrides
michael@0 66 virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
michael@0 67 InlineMinWidthData *aData) MOZ_OVERRIDE;
michael@0 68 virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
michael@0 69 InlinePrefWidthData *aData) MOZ_OVERRIDE;
michael@0 70 virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
michael@0 71 nsSize aCBSize, nscoord aAvailableWidth,
michael@0 72 nsSize aMargin, nsSize aBorder, nsSize aPadding,
michael@0 73 uint32_t aFlags) MOZ_OVERRIDE;
michael@0 74 virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
michael@0 75 virtual nsresult Reflow(nsPresContext* aPresContext,
michael@0 76 nsHTMLReflowMetrics& aDesiredSize,
michael@0 77 const nsHTMLReflowState& aReflowState,
michael@0 78 nsReflowStatus& aStatus) MOZ_OVERRIDE;
michael@0 79
michael@0 80 virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
michael@0 81
michael@0 82 virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
michael@0 83 virtual nscoord GetBaseline() const MOZ_OVERRIDE;
michael@0 84 virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
michael@0 85
michael@0 86 /**
michael@0 87 * Return true if the frame is first visual frame or first continuation
michael@0 88 */
michael@0 89 bool IsFirst() const {
michael@0 90 // If the frame's bidi visual state is set, return is-first state
michael@0 91 // else return true if it's the first continuation.
michael@0 92 return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
michael@0 93 ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_FIRST)
michael@0 94 : (!GetPrevInFlow());
michael@0 95 }
michael@0 96
michael@0 97 /**
michael@0 98 * Return true if the frame is last visual frame or last continuation.
michael@0 99 */
michael@0 100 bool IsLast() const {
michael@0 101 // If the frame's bidi visual state is set, return is-last state
michael@0 102 // else return true if it's the last continuation.
michael@0 103 return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
michael@0 104 ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LAST)
michael@0 105 : (!GetNextInFlow());
michael@0 106 }
michael@0 107
michael@0 108 protected:
michael@0 109 // Additional reflow state used during our reflow methods
michael@0 110 struct InlineReflowState {
michael@0 111 nsIFrame* mPrevFrame;
michael@0 112 nsInlineFrame* mNextInFlow;
michael@0 113 nsIFrame* mLineContainer;
michael@0 114 nsLineLayout* mLineLayout;
michael@0 115 bool mSetParentPointer; // when reflowing child frame first set its
michael@0 116 // parent frame pointer
michael@0 117
michael@0 118 InlineReflowState() {
michael@0 119 mPrevFrame = nullptr;
michael@0 120 mNextInFlow = nullptr;
michael@0 121 mLineContainer = nullptr;
michael@0 122 mLineLayout = nullptr;
michael@0 123 mSetParentPointer = false;
michael@0 124 }
michael@0 125 };
michael@0 126
michael@0 127 nsInlineFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
michael@0 128
michael@0 129 virtual int GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
michael@0 130
michael@0 131 nsresult ReflowFrames(nsPresContext* aPresContext,
michael@0 132 const nsHTMLReflowState& aReflowState,
michael@0 133 InlineReflowState& rs,
michael@0 134 nsHTMLReflowMetrics& aMetrics,
michael@0 135 nsReflowStatus& aStatus);
michael@0 136
michael@0 137 nsresult ReflowInlineFrame(nsPresContext* aPresContext,
michael@0 138 const nsHTMLReflowState& aReflowState,
michael@0 139 InlineReflowState& rs,
michael@0 140 nsIFrame* aFrame,
michael@0 141 nsReflowStatus& aStatus);
michael@0 142
michael@0 143 /**
michael@0 144 * Reparent floats whose placeholders are inline descendants of aFrame from
michael@0 145 * whatever block they're currently parented by to aOurBlock.
michael@0 146 * @param aReparentSiblings if this is true, we follow aFrame's
michael@0 147 * GetNextSibling chain reparenting them all
michael@0 148 */
michael@0 149 void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
michael@0 150 bool aReparentSiblings);
michael@0 151
michael@0 152 virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
michael@0 153 InlineReflowState& rs,
michael@0 154 bool* aIsComplete);
michael@0 155
michael@0 156 virtual void PushFrames(nsPresContext* aPresContext,
michael@0 157 nsIFrame* aFromChild,
michael@0 158 nsIFrame* aPrevSibling,
michael@0 159 InlineReflowState& aState);
michael@0 160
michael@0 161 private:
michael@0 162 // Helper method for DrainSelfOverflowList() to deal with lazy parenting
michael@0 163 // (which we only do for nsInlineFrame, not nsFirstLineFrame).
michael@0 164 enum DrainFlags {
michael@0 165 eDontReparentFrames = 1, // skip reparenting the overflow list frames
michael@0 166 eInFirstLine = 2, // the request is for an inline descendant of a nsFirstLineFrame
michael@0 167 };
michael@0 168 /**
michael@0 169 * Move any frames on our overflow list to the end of our principal list.
michael@0 170 * @param aFlags one or more of the above DrainFlags
michael@0 171 * @param aLineContainer the nearest line container ancestor
michael@0 172 * @return true if there were any overflow frames
michael@0 173 */
michael@0 174 bool DrainSelfOverflowListInternal(DrainFlags aFlags,
michael@0 175 nsIFrame* aLineContainer);
michael@0 176 protected:
michael@0 177 nscoord mBaseline;
michael@0 178 };
michael@0 179
michael@0 180 //----------------------------------------------------------------------
michael@0 181
michael@0 182 /**
michael@0 183 * Variation on inline-frame used to manage lines for line layout in
michael@0 184 * special situations (:first-line style in particular).
michael@0 185 */
michael@0 186 class nsFirstLineFrame MOZ_FINAL : public nsInlineFrame {
michael@0 187 public:
michael@0 188 NS_DECL_FRAMEARENA_HELPERS
michael@0 189
michael@0 190 friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0 191
michael@0 192 #ifdef DEBUG_FRAME_DUMP
michael@0 193 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
michael@0 194 #endif
michael@0 195 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
michael@0 196 virtual nsresult Reflow(nsPresContext* aPresContext,
michael@0 197 nsHTMLReflowMetrics& aDesiredSize,
michael@0 198 const nsHTMLReflowState& aReflowState,
michael@0 199 nsReflowStatus& aStatus) MOZ_OVERRIDE;
michael@0 200
michael@0 201 virtual void Init(nsIContent* aContent, nsIFrame* aParent,
michael@0 202 nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
michael@0 203 virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
michael@0 204 virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
michael@0 205
michael@0 206 protected:
michael@0 207 nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
michael@0 208
michael@0 209 virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
michael@0 210 InlineReflowState& rs,
michael@0 211 bool* aIsComplete) MOZ_OVERRIDE;
michael@0 212 };
michael@0 213
michael@0 214 #endif /* nsInlineFrame_h___ */

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