2 * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
21 #ifndef RootInlineBox_h
22 #define RootInlineBox_h
24 #include "core/rendering/InlineFlowBox.h"
25 #include "platform/text/BidiContext.h"
31 class RenderBlockFlow;
36 class RootInlineBox : public InlineFlowBox {
38 explicit RootInlineBox(RenderBlockFlow*);
40 virtual void destroy() OVERRIDE FINAL;
42 virtual bool isRootInlineBox() const OVERRIDE FINAL { return true; }
44 void detachEllipsisBox();
46 RootInlineBox* nextRootBox() const { return static_cast<RootInlineBox*>(m_nextLineBox); }
47 RootInlineBox* prevRootBox() const { return static_cast<RootInlineBox*>(m_prevLineBox); }
49 virtual void adjustPosition(float dx, float dy) OVERRIDE FINAL;
51 LayoutUnit lineTop() const { return m_lineTop; }
52 LayoutUnit lineBottom() const { return m_lineBottom; }
54 LayoutUnit lineTopWithLeading() const { return m_lineTopWithLeading; }
55 LayoutUnit lineBottomWithLeading() const { return m_lineBottomWithLeading; }
57 LayoutUnit paginationStrut() const { return m_fragmentationData ? m_fragmentationData->m_paginationStrut : LayoutUnit(0); }
58 void setPaginationStrut(LayoutUnit strut) { ensureLineFragmentationData()->m_paginationStrut = strut; }
60 bool isFirstAfterPageBreak() const { return m_fragmentationData ? m_fragmentationData->m_isFirstAfterPageBreak : false; }
61 void setIsFirstAfterPageBreak(bool isFirstAfterPageBreak) { ensureLineFragmentationData()->m_isFirstAfterPageBreak = isFirstAfterPageBreak; }
63 LayoutUnit paginatedLineWidth() const { return m_fragmentationData ? m_fragmentationData->m_paginatedLineWidth : LayoutUnit(0); }
64 void setPaginatedLineWidth(LayoutUnit width) { ensureLineFragmentationData()->m_paginatedLineWidth = width; }
66 LayoutUnit selectionTop() const;
67 LayoutUnit selectionBottom() const;
68 LayoutUnit selectionHeight() const { return max<LayoutUnit>(0, selectionBottom() - selectionTop()); }
70 LayoutUnit selectionTopAdjustedForPrecedingBlock() const;
71 LayoutUnit selectionHeightAdjustedForPrecedingBlock() const { return max<LayoutUnit>(0, selectionBottom() - selectionTopAdjustedForPrecedingBlock()); }
73 int blockDirectionPointInLine() const;
75 LayoutUnit alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&);
76 void setLineTopBottomPositions(LayoutUnit top, LayoutUnit bottom, LayoutUnit topWithLeading, LayoutUnit bottomWithLeading)
79 m_lineBottom = bottom;
80 m_lineTopWithLeading = topWithLeading;
81 m_lineBottomWithLeading = bottomWithLeading;
84 virtual RenderLineBoxList* rendererLineBoxes() const OVERRIDE FINAL;
86 RenderObject* lineBreakObj() const { return m_lineBreakObj; }
87 BidiStatus lineBreakBidiStatus() const;
88 void setLineBreakInfo(RenderObject*, unsigned breakPos, const BidiStatus&);
90 unsigned lineBreakPos() const { return m_lineBreakPos; }
91 void setLineBreakPos(unsigned p) { m_lineBreakPos = p; }
93 using InlineBox::endsWithBreak;
94 using InlineBox::setEndsWithBreak;
96 void childRemoved(InlineBox* box);
98 bool lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
99 // Return the truncatedWidth, the width of the truncated text + ellipsis.
100 float placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox = 0);
101 // Return the position of the EllipsisBox or -1.
102 virtual float placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) OVERRIDE FINAL;
104 using InlineBox::hasEllipsisBox;
105 EllipsisBox* ellipsisBox() const;
107 void paintEllipsisBox(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) const;
109 virtual void clearTruncation() OVERRIDE FINAL;
111 bool isHyphenated() const;
113 virtual int baselinePosition(FontBaseline baselineType) const OVERRIDE FINAL;
114 virtual LayoutUnit lineHeight() const OVERRIDE FINAL;
116 virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE;
117 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE FINAL;
119 using InlineBox::hasSelectedChildren;
120 using InlineBox::setHasSelectedChildren;
122 virtual RenderObject::SelectionState selectionState() OVERRIDE FINAL;
123 InlineBox* firstSelectedBox();
124 InlineBox* lastSelectedBox();
126 GapRects lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo*);
128 RenderBlockFlow* block() const;
130 InlineBox* closestLeafChildForPoint(const IntPoint&, bool onlyEditableLeaves);
131 InlineBox* closestLeafChildForLogicalLeftPosition(int, bool onlyEditableLeaves = false);
133 void appendFloat(RenderBox* floatingBox)
137 m_floats->append(floatingBox);
139 m_floats= adoptPtr(new Vector<RenderBox*>(1, floatingBox));
142 Vector<RenderBox*>* floatsPtr() { ASSERT(!isDirty()); return m_floats.get(); }
144 virtual void extractLineBoxFromRenderObject() OVERRIDE FINAL;
145 virtual void attachLineBoxToRenderObject() OVERRIDE FINAL;
146 virtual void removeLineBoxFromRenderObject() OVERRIDE FINAL;
148 FontBaseline baselineType() const { return static_cast<FontBaseline>(m_baselineType); }
150 bool hasAnnotationsBefore() const { return m_hasAnnotationsBefore; }
151 bool hasAnnotationsAfter() const { return m_hasAnnotationsAfter; }
153 LayoutRect paddedLayoutOverflowRect(LayoutUnit endPadding) const;
155 void ascentAndDescentForBox(InlineBox*, GlyphOverflowAndFallbackFontsMap&, int& ascent, int& descent, bool& affectsAscent, bool& affectsDescent) const;
156 LayoutUnit verticalPositionForBox(InlineBox*, VerticalPositionCache&);
157 bool includeLeadingForBox(InlineBox*) const;
158 bool includeFontForBox(InlineBox*) const;
159 bool includeGlyphsForBox(InlineBox*) const;
160 bool includeMarginForBox(InlineBox*) const;
161 bool fitsToGlyphs() const;
162 bool includesRootLineBoxFontOrLeading() const;
164 LayoutUnit logicalTopVisualOverflow() const
166 return InlineFlowBox::logicalTopVisualOverflow(lineTop());
168 LayoutUnit logicalBottomVisualOverflow() const
170 return InlineFlowBox::logicalBottomVisualOverflow(lineBottom());
172 LayoutUnit logicalTopLayoutOverflow() const
174 return InlineFlowBox::logicalTopLayoutOverflow(lineTop());
176 LayoutUnit logicalBottomLayoutOverflow() const
178 return InlineFlowBox::logicalBottomLayoutOverflow(lineBottom());
181 // Used to calculate the underline offset for TextUnderlinePositionUnder.
182 float maxLogicalTop() const;
184 Node* getLogicalStartBoxWithNode(InlineBox*&) const;
185 Node* getLogicalEndBoxWithNode(InlineBox*&) const;
188 virtual const char* boxName() const OVERRIDE;
191 LayoutUnit beforeAnnotationsAdjustment() const;
193 struct LineFragmentationData;
194 LineFragmentationData* ensureLineFragmentationData()
196 if (!m_fragmentationData)
197 m_fragmentationData = adoptPtr(new LineFragmentationData());
199 return m_fragmentationData.get();
202 // This folds into the padding at the end of InlineFlowBox on 64-bit.
203 unsigned m_lineBreakPos;
205 // Where this line ended. The exact object and the position within that object are stored so that
206 // we can create an InlineIterator beginning just after the end of this line.
207 RenderObject* m_lineBreakObj;
208 RefPtr<BidiContext> m_lineBreakContext;
210 LayoutUnit m_lineTop;
211 LayoutUnit m_lineBottom;
213 LayoutUnit m_lineTopWithLeading;
214 LayoutUnit m_lineBottomWithLeading;
216 struct LineFragmentationData {
217 WTF_MAKE_NONCOPYABLE(LineFragmentationData); WTF_MAKE_FAST_ALLOCATED;
219 LineFragmentationData()
220 : m_paginationStrut(0)
221 , m_paginatedLineWidth(0)
222 , m_isFirstAfterPageBreak(false)
227 LayoutUnit m_paginationStrut;
228 LayoutUnit m_paginatedLineWidth;
229 bool m_isFirstAfterPageBreak;
232 OwnPtr<LineFragmentationData> m_fragmentationData;
234 // Floats hanging off the line are pushed into this vector during layout. It is only
235 // good for as long as the line has not been marked dirty.
236 OwnPtr<Vector<RenderBox*> > m_floats;
239 } // namespace WebCore
241 #endif // RootInlineBox_h