layout/generic/nsInlineFrame.h@6474c204b198
layout/generic/nsInlineFrame.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 /* rendering object for CSS display:inline objects */
8 #ifndef nsInlineFrame_h___
9 #define nsInlineFrame_h___
11 #include "mozilla/Attributes.h"
12 #include "nsContainerFrame.h"
14 class nsLineLayout;
16 typedef nsContainerFrame nsInlineFrameBase;
18 /**
19 * Inline frame class.
20 *
21 * This class manages a list of child frames that are inline frames. Working with
22 * nsLineLayout, the class will reflow and place inline frames on a line.
23 */
24 class nsInlineFrame : public nsInlineFrameBase
25 {
26 public:
27 NS_DECL_QUERYFRAME_TARGET(nsInlineFrame)
28 NS_DECL_QUERYFRAME
29 NS_DECL_FRAMEARENA_HELPERS
31 friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
33 // nsIFrame overrides
34 virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
35 const nsRect& aDirtyRect,
36 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
38 #ifdef ACCESSIBILITY
39 virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
40 #endif
42 #ifdef DEBUG_FRAME_DUMP
43 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
44 #endif
45 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
47 virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
48 {
49 if (aFlags & eSupportsCSSTransforms) {
50 return false;
51 }
52 return nsContainerFrame::IsFrameOfType(aFlags &
53 ~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
54 }
56 virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
57 virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
59 virtual bool IsEmpty() MOZ_OVERRIDE;
60 virtual bool IsSelfEmpty() MOZ_OVERRIDE;
62 virtual FrameSearchResult PeekOffsetCharacter(bool aForward, int32_t* aOffset,
63 bool aRespectClusters = true) MOZ_OVERRIDE;
65 // nsIHTMLReflow overrides
66 virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
67 InlineMinWidthData *aData) MOZ_OVERRIDE;
68 virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
69 InlinePrefWidthData *aData) MOZ_OVERRIDE;
70 virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
71 nsSize aCBSize, nscoord aAvailableWidth,
72 nsSize aMargin, nsSize aBorder, nsSize aPadding,
73 uint32_t aFlags) MOZ_OVERRIDE;
74 virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
75 virtual nsresult Reflow(nsPresContext* aPresContext,
76 nsHTMLReflowMetrics& aDesiredSize,
77 const nsHTMLReflowState& aReflowState,
78 nsReflowStatus& aStatus) MOZ_OVERRIDE;
80 virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
82 virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
83 virtual nscoord GetBaseline() const MOZ_OVERRIDE;
84 virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
86 /**
87 * Return true if the frame is first visual frame or first continuation
88 */
89 bool IsFirst() const {
90 // If the frame's bidi visual state is set, return is-first state
91 // else return true if it's the first continuation.
92 return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
93 ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_FIRST)
94 : (!GetPrevInFlow());
95 }
97 /**
98 * Return true if the frame is last visual frame or last continuation.
99 */
100 bool IsLast() const {
101 // If the frame's bidi visual state is set, return is-last state
102 // else return true if it's the last continuation.
103 return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
104 ? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LAST)
105 : (!GetNextInFlow());
106 }
108 protected:
109 // Additional reflow state used during our reflow methods
110 struct InlineReflowState {
111 nsIFrame* mPrevFrame;
112 nsInlineFrame* mNextInFlow;
113 nsIFrame* mLineContainer;
114 nsLineLayout* mLineLayout;
115 bool mSetParentPointer; // when reflowing child frame first set its
116 // parent frame pointer
118 InlineReflowState() {
119 mPrevFrame = nullptr;
120 mNextInFlow = nullptr;
121 mLineContainer = nullptr;
122 mLineLayout = nullptr;
123 mSetParentPointer = false;
124 }
125 };
127 nsInlineFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
129 virtual int GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
131 nsresult ReflowFrames(nsPresContext* aPresContext,
132 const nsHTMLReflowState& aReflowState,
133 InlineReflowState& rs,
134 nsHTMLReflowMetrics& aMetrics,
135 nsReflowStatus& aStatus);
137 nsresult ReflowInlineFrame(nsPresContext* aPresContext,
138 const nsHTMLReflowState& aReflowState,
139 InlineReflowState& rs,
140 nsIFrame* aFrame,
141 nsReflowStatus& aStatus);
143 /**
144 * Reparent floats whose placeholders are inline descendants of aFrame from
145 * whatever block they're currently parented by to aOurBlock.
146 * @param aReparentSiblings if this is true, we follow aFrame's
147 * GetNextSibling chain reparenting them all
148 */
149 void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
150 bool aReparentSiblings);
152 virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
153 InlineReflowState& rs,
154 bool* aIsComplete);
156 virtual void PushFrames(nsPresContext* aPresContext,
157 nsIFrame* aFromChild,
158 nsIFrame* aPrevSibling,
159 InlineReflowState& aState);
161 private:
162 // Helper method for DrainSelfOverflowList() to deal with lazy parenting
163 // (which we only do for nsInlineFrame, not nsFirstLineFrame).
164 enum DrainFlags {
165 eDontReparentFrames = 1, // skip reparenting the overflow list frames
166 eInFirstLine = 2, // the request is for an inline descendant of a nsFirstLineFrame
167 };
168 /**
169 * Move any frames on our overflow list to the end of our principal list.
170 * @param aFlags one or more of the above DrainFlags
171 * @param aLineContainer the nearest line container ancestor
172 * @return true if there were any overflow frames
173 */
174 bool DrainSelfOverflowListInternal(DrainFlags aFlags,
175 nsIFrame* aLineContainer);
176 protected:
177 nscoord mBaseline;
178 };
180 //----------------------------------------------------------------------
182 /**
183 * Variation on inline-frame used to manage lines for line layout in
184 * special situations (:first-line style in particular).
185 */
186 class nsFirstLineFrame MOZ_FINAL : public nsInlineFrame {
187 public:
188 NS_DECL_FRAMEARENA_HELPERS
190 friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
192 #ifdef DEBUG_FRAME_DUMP
193 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
194 #endif
195 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
196 virtual nsresult Reflow(nsPresContext* aPresContext,
197 nsHTMLReflowMetrics& aDesiredSize,
198 const nsHTMLReflowState& aReflowState,
199 nsReflowStatus& aStatus) MOZ_OVERRIDE;
201 virtual void Init(nsIContent* aContent, nsIFrame* aParent,
202 nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
203 virtual void PullOverflowsFromPrevInFlow() MOZ_OVERRIDE;
204 virtual bool DrainSelfOverflowList() MOZ_OVERRIDE;
206 protected:
207 nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
209 virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
210 InlineReflowState& rs,
211 bool* aIsComplete) MOZ_OVERRIDE;
212 };
214 #endif /* nsInlineFrame_h___ */
