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 "SVGNames.h"
25#include "core/rendering/svg/SVGPathData.h"
26#include "core/svg/SVGPathElement.h"
27#include "core/svg/SVGTextPathElement.h"
28
29namespace WebCore {
30
31RenderSVGTextPath::RenderSVGTextPath(Element* element)
32    : RenderSVGInline(element)
33{
34}
35
36Path RenderSVGTextPath::layoutPath() const
37{
38    SVGTextPathElement* textPathElement = toSVGTextPathElement(node());
39    Element* targetElement = SVGURIReference::targetElementFromIRIString(textPathElement->hrefCurrentValue(), textPathElement->document());
40    if (!targetElement || !targetElement->hasTagName(SVGNames::pathTag))
41        return Path();
42
43    SVGPathElement* pathElement = toSVGPathElement(targetElement);
44
45    Path pathData;
46    updatePathFromGraphicsElement(pathElement, pathData);
47
48    // Spec:  The transform attribute on the referenced 'path' element represents a
49    // supplemental transformation relative to the current user coordinate system for
50    // the current 'text' element, including any adjustments to the current user coordinate
51    // system due to a possible transform attribute on the current 'text' element.
52    // http://www.w3.org/TR/SVG/text.html#TextPathElement
53    pathData.transform(pathElement->animatedLocalTransform());
54    return pathData;
55}
56
57float RenderSVGTextPath::startOffset() const
58{
59    return toSVGTextPathElement(node())->startOffsetCurrentValue().valueAsPercentage();
60}
61
62}
63