WebCore/SVGRootInlineBox.h

   1 /*
   2  * This file is part of the WebKit project.
   3  *
   4  * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
   5  *           (C) 2006 Apple Computer Inc.
   6  *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public License
  19  * along with this library; see the file COPYING.LIB.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #ifndef SVGRootInlineBox_h
  26 #define SVGRootInlineBox_h
  27
  28 #if ENABLE(SVG)
  29 #include "RootInlineBox.h"
  30 #include "SVGCharacterLayoutInfo.h"
  31
  32 namespace WebCore {
  33
  34 class InlineTextBox;
  35 class RenderSVGRoot;
  36 class SVGInlineTextBox;
  37
  38 struct LastGlyphInfo {
  39     LastGlyphInfo() : isValid(false) { }
  40
  41     String unicode;
  42     String glyphName;
  43     bool isValid;
  44 };
  45
  46 class SVGRootInlineBox : public RootInlineBox {
  47 public:
  48     SVGRootInlineBox(RenderObject* obj)
  49         : RootInlineBox(obj)
  50     {
  51     }
  52
  53     virtual bool isSVGRootInlineBox() { return true; }
  54
  55     virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
  56
  57     virtual int placeBoxesHorizontally(int x, int& leftPosition, int& rightPosition, bool& needsWordSpacing);
  58     virtual int verticallyAlignBoxes(int heightOfBlock);
  59
  60     virtual void computePerCharacterLayoutInformation();
  61
  62     // Used by SVGInlineTextBox
  63     const Vector<SVGTextChunk>& svgTextChunks() const;
  64
  65     void walkTextChunks(SVGTextChunkWalkerBase*, const SVGInlineTextBox* textBox = 0);
  66
  67 private:
  68     friend struct SVGRootInlineBoxPaintWalker;
  69
  70     void layoutInlineBoxes();
  71     void layoutInlineBoxes(InlineFlowBox* start, Vector<SVGChar>::iterator& it, int& minX, int& maxX, int& minY, int& maxY);
  72
  73     void buildLayoutInformation(InlineFlowBox* start, SVGCharacterLayoutInfo&);
  74     void buildLayoutInformationForTextBox(SVGCharacterLayoutInfo&, InlineTextBox*, LastGlyphInfo&);
  75
  76     void buildTextChunks(Vector<SVGChar>&, Vector<SVGTextChunk>&, InlineFlowBox* start);
  77     void buildTextChunks(Vector<SVGChar>&, InlineFlowBox* start, SVGTextChunkLayoutInfo&);
  78     void layoutTextChunks();
  79
  80     SVGTextDecorationInfo retrievePaintServersForTextDecoration(RenderObject* start);
  81
  82 private:
  83     Vector<SVGChar> m_svgChars;
  84     Vector<SVGTextChunk> m_svgTextChunks;
  85 };
  86
  87 // Shared with SVGRenderTreeAsText / SVGInlineTextBox
  88 TextRun svgTextRunForInlineTextBox(const UChar*, int len, RenderStyle* style, const InlineTextBox* textBox, float xPos);
  89 FloatPoint topLeftPositionOfCharacterRange(Vector<SVGChar>::iterator start, Vector<SVGChar>::iterator end);
  90 float cummulatedWidthOfInlineBoxCharacterRange(SVGInlineBoxCharacterRange& range);
  91 float cummulatedHeightOfInlineBoxCharacterRange(SVGInlineBoxCharacterRange& range);
  92
  93 RenderSVGRoot* findSVGRootObject(RenderObject* start);
  94
  95 } // namespace WebCore
  96
  97 #endif // ENABLE(SVG)
  98
  99 #endif // SVGRootInlineBox_h