1 /*
2 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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 #include "core/rendering/svg/RenderSVGTextPath.h"
23
24 #include "core/rendering/svg/SVGPathData.h"
25 #include "core/rendering/svg/SVGRenderSupport.h"
26 #include "core/svg/SVGPathElement.h"
27 #include "core/svg/SVGTextPathElement.h"
28
29 namespace WebCore {
30
RenderSVGTextPath(Element * element)31 RenderSVGTextPath::RenderSVGTextPath(Element* element)
32 : RenderSVGInline(element)
33 {
34 }
35
isChildAllowed(RenderObject * child,RenderStyle *) const36 bool RenderSVGTextPath::isChildAllowed(RenderObject* child, RenderStyle*) const
37 {
38 if (child->isText())
39 return SVGRenderSupport::isRenderableTextNode(child);
40
41 #if ENABLE(SVG_FONTS)
42 // 'altGlyph' is supported by the content model for 'textPath', but...
43 ASSERT(child->node());
44 if (isSVGAltGlyphElement(*child->node()))
45 return false;
46 #endif
47
48 return child->isSVGInline() && !child->isSVGTextPath();
49 }
50
layoutPath() const51 Path RenderSVGTextPath::layoutPath() const
52 {
53 SVGTextPathElement* textPathElement = toSVGTextPathElement(node());
54 Element* targetElement = SVGURIReference::targetElementFromIRIString(textPathElement->href()->currentValue()->value(), textPathElement->treeScope());
55 if (!isSVGPathElement(targetElement))
56 return Path();
57
58 SVGPathElement& pathElement = toSVGPathElement(*targetElement);
59
60 Path pathData;
61 updatePathFromGraphicsElement(&pathElement, pathData);
62
63 // Spec: The transform attribute on the referenced 'path' element represents a
64 // supplemental transformation relative to the current user coordinate system for
65 // the current 'text' element, including any adjustments to the current user coordinate
66 // system due to a possible transform attribute on the current 'text' element.
67 // http://www.w3.org/TR/SVG/text.html#TextPathElement
68 pathData.transform(pathElement.animatedLocalTransform());
69 return pathData;
70 }
71
startOffset() const72 float RenderSVGTextPath::startOffset() const
73 {
74 return toSVGTextPathElement(node())->startOffset()->currentValue()->valueAsPercentage();
75 }
76
77 }
78