1 /* 2 * (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 2000 Dirk Mueller (mueller (at) kde.org) 4 * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef InlineTextBox_h 24 #define InlineTextBox_h 25 26 #include "InlineRunBox.h" 27 #include "RenderText.h" // so textRenderer() can be inline 28 29 namespace WebCore { 30 31 struct CompositionUnderline; 32 33 const unsigned short cNoTruncation = USHRT_MAX; 34 const unsigned short cFullTruncation = USHRT_MAX - 1; 35 36 // Helper functions shared by InlineTextBox / SVGRootInlineBox 37 void updateGraphicsContext(GraphicsContext*, const Color& fillColor, const Color& strokeColor, float strokeThickness, ColorSpace); 38 Color correctedTextColor(Color textColor, Color backgroundColor); 39 40 class InlineTextBox : public InlineRunBox { 41 public: 42 InlineTextBox(RenderObject* obj) 43 : InlineRunBox(obj) 44 , m_start(0) 45 , m_len(0) 46 , m_truncation(cNoTruncation) 47 { 48 } 49 50 InlineTextBox* nextTextBox() const { return static_cast<InlineTextBox*>(nextLineBox()); } 51 InlineTextBox* prevTextBox() const { return static_cast<InlineTextBox*>(prevLineBox()); } 52 53 unsigned start() const { return m_start; } 54 unsigned end() const { return m_len ? m_start + m_len - 1 : m_start; } 55 unsigned len() const { return m_len; } 56 57 void setStart(unsigned start) { m_start = start; } 58 void setLen(unsigned len) { m_len = len; } 59 60 void offsetRun(int d) { m_start += d; } 61 62 void setFallbackFonts(const HashSet<const SimpleFontData*>&); 63 void takeFallbackFonts(Vector<const SimpleFontData*>&); 64 65 unsigned short truncation() { return m_truncation; } 66 67 private: 68 virtual int selectionTop(); 69 virtual int selectionHeight(); 70 71 public: 72 virtual IntRect selectionRect(int absx, int absy, int startPos, int endPos); 73 bool isSelected(int startPos, int endPos) const; 74 void selectionStartEnd(int& sPos, int& ePos); 75 76 private: 77 virtual void paint(RenderObject::PaintInfo&, int tx, int ty); 78 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty); 79 80 public: 81 RenderText* textRenderer() const; 82 83 private: 84 virtual void deleteLine(RenderArena*); 85 virtual void extractLine(); 86 virtual void attachLine(); 87 88 public: 89 virtual RenderObject::SelectionState selectionState(); 90 91 private: 92 virtual void clearTruncation() { m_truncation = cNoTruncation; } 93 virtual int placeEllipsisBox(bool flowIsLTR, int visibleLeftEdge, int visibleRightEdge, int ellipsisWidth, bool& foundBox); 94 95 public: 96 virtual bool isLineBreak() const; 97 98 void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; } 99 100 private: 101 virtual bool isInlineTextBox() { return true; } 102 103 public: 104 virtual int caretMinOffset() const; 105 virtual int caretMaxOffset() const; 106 107 private: 108 virtual unsigned caretMaxRenderedOffset() const; 109 110 int textPos() const; 111 112 public: 113 virtual int offsetForPosition(int x, bool includePartialGlyphs = true) const; 114 virtual int positionForOffset(int offset) const; 115 116 bool containsCaretOffset(int offset) const; // false for offset after line break 117 118 private: 119 int m_start; 120 unsigned short m_len; 121 122 unsigned short m_truncation; // Where to truncate when text overflow is applied. We use special constants to 123 // denote no truncation (the whole run paints) and full truncation (nothing paints at all). 124 125 protected: 126 void paintCompositionBackground(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, int startPos, int endPos); 127 void paintDocumentMarkers(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, bool background); 128 void paintCompositionUnderline(GraphicsContext*, int tx, int ty, const CompositionUnderline&); 129 #if PLATFORM(MAC) 130 void paintCustomHighlight(int tx, int ty, const AtomicString& type); 131 #endif 132 133 private: 134 void paintDecoration(GraphicsContext*, int tx, int ty, int decoration, ShadowData*); 135 void paintSelection(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&); 136 void paintSpellingOrGrammarMarker(GraphicsContext*, int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&, bool grammar); 137 void paintTextMatchMarker(GraphicsContext*, int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&); 138 void computeRectForReplacementMarker(int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&); 139 }; 140 141 inline RenderText* InlineTextBox::textRenderer() const 142 { 143 return toRenderText(renderer()); 144 } 145 146 } // namespace WebCore 147 148 #endif // InlineTextBox_h 149
