1 /* 2 * Copyright (C) Research In Motion Limited 2010. 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 #ifndef SVGTextChunk_h 21 #define SVGTextChunk_h 22 23 #include "core/rendering/style/SVGRenderStyleDefs.h" 24 #include "core/svg/SVGTextContentElement.h" 25 26 namespace blink { 27 28 class SVGInlineTextBox; 29 30 // A SVGTextChunk describes a range of SVGTextFragments, see the SVG spec definition of a "text chunk". 31 class SVGTextChunk { 32 public: 33 enum ChunkStyle { 34 DefaultStyle = 1 << 0, 35 MiddleAnchor = 1 << 1, 36 EndAnchor = 1 << 2, 37 RightToLeftText = 1 << 3, 38 VerticalText = 1 << 4, 39 LengthAdjustSpacing = 1 << 5, 40 LengthAdjustSpacingAndGlyphs = 1 << 6 41 }; 42 43 SVGTextChunk(unsigned chunkStyle, float desiredTextLength); 44 45 void calculateLength(float& length, unsigned& characters) const; 46 float calculateTextAnchorShift(float length) const; 47 48 bool isVerticalText() const { return m_chunkStyle & VerticalText; } 49 float desiredTextLength() const { return m_desiredTextLength; } 50 51 Vector<SVGInlineTextBox*>& boxes() { return m_boxes; } 52 const Vector<SVGInlineTextBox*>& boxes() const { return m_boxes; } 53 54 bool hasDesiredTextLength() const { return m_desiredTextLength > 0 && ((m_chunkStyle & LengthAdjustSpacing) || (m_chunkStyle & LengthAdjustSpacingAndGlyphs)); } 55 bool hasTextAnchor() const { return m_chunkStyle & RightToLeftText ? !(m_chunkStyle & EndAnchor) : (m_chunkStyle & MiddleAnchor) || (m_chunkStyle & EndAnchor); } 56 bool hasLengthAdjustSpacing() const { return m_chunkStyle & LengthAdjustSpacing; } 57 bool hasLengthAdjustSpacingAndGlyphs() const { return m_chunkStyle & LengthAdjustSpacingAndGlyphs; } 58 59 private: 60 // Contains all SVGInlineTextBoxes this chunk spans. 61 Vector<SVGInlineTextBox*> m_boxes; 62 63 unsigned m_chunkStyle; 64 float m_desiredTextLength; 65 }; 66 67 } // namespace blink 68 69 #endif 70
