1 /* 2 * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved. 3 * 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. 8 * 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. 13 * 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. 18 * 19 */ 20 21 #ifndef RootInlineBox_h 22 #define RootInlineBox_h 23 24 #include "core/rendering/InlineFlowBox.h" 25 #include "platform/text/BidiContext.h" 26 27 namespace WebCore { 28 29 class EllipsisBox; 30 class HitTestResult; 31 class RenderBlockFlow; 32 33 struct BidiStatus; 34 struct GapRects; 35 36 class RootInlineBox : public InlineFlowBox { 37 public: 38 explicit RootInlineBox(RenderBlockFlow&); 39 40 virtual void destroy() OVERRIDE FINAL; 41 42 virtual bool isRootInlineBox() const OVERRIDE FINAL { return true; } 43 44 void detachEllipsisBox(); 45 46 RootInlineBox* nextRootBox() const { return static_cast<RootInlineBox*>(m_nextLineBox); } 47 RootInlineBox* prevRootBox() const { return static_cast<RootInlineBox*>(m_prevLineBox); } 48 49 virtual void adjustPosition(float dx, float dy) OVERRIDE FINAL; 50 51 LayoutUnit lineTop() const { return m_lineTop; } 52 LayoutUnit lineBottom() const { return m_lineBottom; } 53 54 LayoutUnit lineTopWithLeading() const { return m_lineTopWithLeading; } 55 LayoutUnit lineBottomWithLeading() const { return m_lineBottomWithLeading; } 56 57 LayoutUnit paginationStrut() const { return m_fragmentationData ? m_fragmentationData->m_paginationStrut : LayoutUnit(0); } 58 void setPaginationStrut(LayoutUnit strut) { ensureLineFragmentationData()->m_paginationStrut = strut; } 59 60 bool isFirstAfterPageBreak() const { return m_fragmentationData ? m_fragmentationData->m_isFirstAfterPageBreak : false; } 61 void setIsFirstAfterPageBreak(bool isFirstAfterPageBreak) { ensureLineFragmentationData()->m_isFirstAfterPageBreak = isFirstAfterPageBreak; } 62 63 LayoutUnit paginatedLineWidth() const { return m_fragmentationData ? m_fragmentationData->m_paginatedLineWidth : LayoutUnit(0); } 64 void setPaginatedLineWidth(LayoutUnit width) { ensureLineFragmentationData()->m_paginatedLineWidth = width; } 65 66 LayoutUnit selectionTop() const; 67 LayoutUnit selectionBottom() const; 68 LayoutUnit selectionHeight() const { return max<LayoutUnit>(0, selectionBottom() - selectionTop()); } 69 70 LayoutUnit selectionTopAdjustedForPrecedingBlock() const; 71 LayoutUnit selectionHeightAdjustedForPrecedingBlock() const { return max<LayoutUnit>(0, selectionBottom() - selectionTopAdjustedForPrecedingBlock()); } 72 73 int blockDirectionPointInLine() const; 74 75 LayoutUnit alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&); 76 void setLineTopBottomPositions(LayoutUnit top, LayoutUnit bottom, LayoutUnit topWithLeading, LayoutUnit bottomWithLeading) 77 { 78 m_lineTop = top; 79 m_lineBottom = bottom; 80 m_lineTopWithLeading = topWithLeading; 81 m_lineBottomWithLeading = bottomWithLeading; 82 } 83 84 virtual RenderLineBoxList* rendererLineBoxes() const OVERRIDE FINAL; 85 86 RenderObject* lineBreakObj() const { return m_lineBreakObj; } 87 BidiStatus lineBreakBidiStatus() const; 88 void setLineBreakInfo(RenderObject*, unsigned breakPos, const BidiStatus&); 89 90 unsigned lineBreakPos() const { return m_lineBreakPos; } 91 void setLineBreakPos(unsigned p) { m_lineBreakPos = p; } 92 93 using InlineBox::endsWithBreak; 94 using InlineBox::setEndsWithBreak; 95 96 void childRemoved(InlineBox* box); 97 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; 103 104 using InlineBox::hasEllipsisBox; 105 EllipsisBox* ellipsisBox() const; 106 107 void paintEllipsisBox(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) const; 108 109 virtual void clearTruncation() OVERRIDE FINAL; 110 111 bool isHyphenated() const; 112 113 virtual int baselinePosition(FontBaseline baselineType) const OVERRIDE FINAL; 114 virtual LayoutUnit lineHeight() const OVERRIDE FINAL; 115 116 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; 118 119 using InlineBox::hasSelectedChildren; 120 using InlineBox::setHasSelectedChildren; 121 122 virtual RenderObject::SelectionState selectionState() OVERRIDE FINAL; 123 InlineBox* firstSelectedBox(); 124 InlineBox* lastSelectedBox(); 125 126 GapRects lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo*); 127 128 RenderBlockFlow& block() const; 129 130 InlineBox* closestLeafChildForPoint(const IntPoint&, bool onlyEditableLeaves); 131 InlineBox* closestLeafChildForLogicalLeftPosition(int, bool onlyEditableLeaves = false); 132 133 void appendFloat(RenderBox* floatingBox) 134 { 135 ASSERT(!isDirty()); 136 if (m_floats) 137 m_floats->append(floatingBox); 138 else 139 m_floats= adoptPtr(new Vector<RenderBox*>(1, floatingBox)); 140 } 141 142 Vector<RenderBox*>* floatsPtr() { ASSERT(!isDirty()); return m_floats.get(); } 143 144 virtual void extractLineBoxFromRenderObject() OVERRIDE FINAL; 145 virtual void attachLineBoxToRenderObject() OVERRIDE FINAL; 146 virtual void removeLineBoxFromRenderObject() OVERRIDE FINAL; 147 148 FontBaseline baselineType() const { return static_cast<FontBaseline>(m_baselineType); } 149 150 bool hasAnnotationsBefore() const { return m_hasAnnotationsBefore; } 151 bool hasAnnotationsAfter() const { return m_hasAnnotationsAfter; } 152 153 LayoutRect paddedLayoutOverflowRect(LayoutUnit endPadding) const; 154 155 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; 163 164 LayoutUnit logicalTopVisualOverflow() const 165 { 166 return InlineFlowBox::logicalTopVisualOverflow(lineTop()); 167 } 168 LayoutUnit logicalBottomVisualOverflow() const 169 { 170 return InlineFlowBox::logicalBottomVisualOverflow(lineBottom()); 171 } 172 LayoutUnit logicalTopLayoutOverflow() const 173 { 174 return InlineFlowBox::logicalTopLayoutOverflow(lineTop()); 175 } 176 LayoutUnit logicalBottomLayoutOverflow() const 177 { 178 return InlineFlowBox::logicalBottomLayoutOverflow(lineBottom()); 179 } 180 181 // Used to calculate the underline offset for TextUnderlinePositionUnder. 182 float maxLogicalTop() const; 183 184 Node* getLogicalStartBoxWithNode(InlineBox*&) const; 185 Node* getLogicalEndBoxWithNode(InlineBox*&) const; 186 187 #ifndef NDEBUG 188 virtual const char* boxName() const OVERRIDE; 189 #endif 190 private: 191 LayoutUnit beforeAnnotationsAdjustment() const; 192 193 struct LineFragmentationData; 194 LineFragmentationData* ensureLineFragmentationData() 195 { 196 if (!m_fragmentationData) 197 m_fragmentationData = adoptPtr(new LineFragmentationData()); 198 199 return m_fragmentationData.get(); 200 } 201 202 // This folds into the padding at the end of InlineFlowBox on 64-bit. 203 unsigned m_lineBreakPos; 204 205 // 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; 209 210 LayoutUnit m_lineTop; 211 LayoutUnit m_lineBottom; 212 213 LayoutUnit m_lineTopWithLeading; 214 LayoutUnit m_lineBottomWithLeading; 215 216 struct LineFragmentationData { 217 WTF_MAKE_NONCOPYABLE(LineFragmentationData); WTF_MAKE_FAST_ALLOCATED; 218 public: 219 LineFragmentationData() 220 : m_paginationStrut(0) 221 , m_paginatedLineWidth(0) 222 , m_isFirstAfterPageBreak(false) 223 { 224 225 } 226 227 LayoutUnit m_paginationStrut; 228 LayoutUnit m_paginatedLineWidth; 229 bool m_isFirstAfterPageBreak; 230 }; 231 232 OwnPtr<LineFragmentationData> m_fragmentationData; 233 234 // 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; 237 }; 238 239 } // namespace WebCore 240 241 #endif // RootInlineBox_h 242