File indexing completed on 2024-04-28 15:24:18

 /*
  * This file is part of the WebKit project.
  *
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "wtf/Platform.h"
 
 #if ENABLE(SVG)
 #include "RenderSVGTextPath.h"
 
 #include "FloatRect.h"
 #include "SVGInlineTextBox.h"
 #include "SVGPathElement.h"
 #include "SVGRootInlineBox.h"
 #include "SVGTextPathElement.h"
 #include "SVGTransformList.h"
 
 namespace WebCore
 {
 
 RenderSVGTextPath::RenderSVGTextPath(DOM::NodeImpl *n)
     : RenderSVGInline(n)
     , m_startOffset(0.0f)
     , m_exactAlignment(true)
     , m_stretchMethod(false)
 {
 }
 
 Path RenderSVGTextPath::layoutPath() const
 {
     SVGTextPathElement *textPathElement = static_cast<SVGTextPathElement *>(element());
     String pathId = SVGURIReference::getTarget(textPathElement->href());
     Element *targetElement = textPathElement->document()->getElementById(pathId);
     if (!targetElement || !targetElement->hasTagName(SVGNames::pathTag)) {
         return Path();
     }
 
     SVGPathElement *pathElement = static_cast<SVGPathElement *>(targetElement);
 
     Path pathData = pathElement->toPathData();
     // Spec:  The transform attribute on the referenced 'path' element represents a
     // supplemental transformation relative to the current user coordinate system for
     // the current 'text' element, including any adjustments to the current user coordinate
     // system due to a possible transform attribute on the current 'text' element.
     // https://www.w3.org/TR/SVG/text.html#TextPathElement
     pathData.transform(pathElement->animatedLocalTransform());
     return pathData;
 }
 
 float RenderSVGTextPath::startOffset() const
 {
     return static_cast<SVGTextPathElement *>(element())->startOffset().valueAsPercentage();
 }
 
 bool RenderSVGTextPath::exactAlignment() const
 {
     return static_cast<SVGTextPathElement *>(element())->spacing() == SVG_TEXTPATH_SPACINGTYPE_EXACT;
 }
 
 bool RenderSVGTextPath::stretchMethod() const
 {
     return static_cast<SVGTextPathElement *>(element())->method() == SVG_TEXTPATH_METHODTYPE_STRETCH;
 }
 
 void RenderSVGTextPath::absoluteRects(Vector<IntRect> &rects, int, int)
 {
     InlineRunBox *firstBox = firstLineBox();
 
     SVGRootInlineBox *rootBox = firstBox ? static_cast<SVGInlineTextBox *>(firstBox)->svgRootInlineBox() : nullptr;
     RenderObject *object = rootBox ? rootBox->object() : nullptr;
 
     if (!object) {
         return;
     }
 
     int xRef = object->xPos() + xPos();
     int yRef = object->yPos() + yPos();
 
     for (InlineRunBox *curr = firstBox; curr; curr = curr->nextLineBox()) {
         FloatRect rect(xRef + curr->xPos(), yRef + curr->yPos(), curr->width(), curr->height());
         rects.append(enclosingIntRect(absoluteTransform().mapRect(rect)));
     }
 }
 
 }
 
 #endif // ENABLE(SVG)