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      1 /*
      2  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      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 #include "config.h"
     21 
     22 #if ENABLE(SVG)
     23 #include "RenderSVGTextPath.h"
     24 
     25 #include "FloatQuad.h"
     26 #include "RenderBlock.h"
     27 #include "SVGInlineTextBox.h"
     28 #include "SVGNames.h"
     29 #include "SVGPathElement.h"
     30 #include "SVGRootInlineBox.h"
     31 #include "SVGTextPathElement.h"
     32 #include "SVGTransformList.h"
     33 
     34 namespace WebCore {
     35 
     36 RenderSVGTextPath::RenderSVGTextPath(Node* n)
     37     : RenderSVGInline(n)
     38     , m_startOffset(0.0f)
     39     , m_exactAlignment(true)
     40     , m_stretchMethod(false)
     41 {
     42 }
     43 
     44 Path RenderSVGTextPath::layoutPath() const
     45 {
     46     SVGTextPathElement* textPathElement = static_cast<SVGTextPathElement*>(node());
     47         String pathId = SVGURIReference::getTarget(textPathElement->href());
     48     Element* targetElement = textPathElement->document()->getElementById(pathId);
     49     if (!targetElement || !targetElement->hasTagName(SVGNames::pathTag))
     50         return Path();
     51 
     52     SVGPathElement* pathElement = static_cast<SVGPathElement*>(targetElement);
     53 
     54     Path pathData;
     55     pathElement->toPathData(pathData);
     56     // Spec:  The transform attribute on the referenced 'path' element represents a
     57     // supplemental transformation relative to the current user coordinate system for
     58     // the current 'text' element, including any adjustments to the current user coordinate
     59     // system due to a possible transform attribute on the current 'text' element.
     60     // http://www.w3.org/TR/SVG/text.html#TextPathElement
     61     pathData.transform(pathElement->animatedLocalTransform());
     62     return pathData;
     63 }
     64 
     65 float RenderSVGTextPath::startOffset() const
     66 {
     67     return static_cast<SVGTextPathElement*>(node())->startOffset().valueAsPercentage();
     68 }
     69 
     70 bool RenderSVGTextPath::exactAlignment() const
     71 {
     72     return static_cast<SVGTextPathElement*>(node())->spacing() == SVG_TEXTPATH_SPACINGTYPE_EXACT;
     73 }
     74 
     75 bool RenderSVGTextPath::stretchMethod() const
     76 {
     77     return static_cast<SVGTextPathElement*>(node())->method() == SVG_TEXTPATH_METHODTYPE_STRETCH;
     78 }
     79 
     80 }
     81 
     82 #endif // ENABLE(SVG)
     83