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/*
* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@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 "config.h"
#include "core/svg/SVGFitToViewBox.h"
#include "core/dom/Attribute.h"
#include "core/dom/Document.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGParserUtilities.h"
#include "platform/geometry/FloatRect.h"
#include "platform/transforms/AffineTransform.h"
#include "wtf/text/StringImpl.h"
namespace WebCore {
template<typename CharType>
static bool parseViewBoxInternal(Document* document, const CharType*& ptr, const CharType* end, FloatRect& viewBox, bool validate)
{
const CharType* start = ptr;
skipOptionalSVGSpaces(ptr, end);
float x = 0.0f;
float y = 0.0f;
float width = 0.0f;
float height = 0.0f;
bool valid = parseNumber(ptr, end, x) && parseNumber(ptr, end, y) && parseNumber(ptr, end, width) && parseNumber(ptr, end, height, false);
if (!validate) {
viewBox = FloatRect(x, y, width, height);
return true;
}
if (!valid) {
document->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + String(start, end - start) + "\"");
return false;
}
if (width < 0.0) { // check that width is positive
document->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
return false;
}
if (height < 0.0) { // check that height is positive
document->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
return false;
}
skipOptionalSVGSpaces(ptr, end);
if (ptr < end) { // nothing should come after the last, fourth number
document->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + String(start, end - start) + "\"");
return false;
}
viewBox = FloatRect(x, y, width, height);
return true;
}
bool SVGFitToViewBox::parseViewBox(Document* document, const LChar*& ptr, const LChar* end, FloatRect& viewBox, bool validate)
{
return parseViewBoxInternal(document, ptr, end, viewBox, validate);
}
bool SVGFitToViewBox::parseViewBox(Document* document, const UChar*& ptr, const UChar* end, FloatRect& viewBox, bool validate)
{
return parseViewBoxInternal(document, ptr, end, viewBox, validate);
}
bool SVGFitToViewBox::parseViewBox(Document* document, const String& string, FloatRect& viewBox)
{
if (string.isEmpty()) {
const LChar* ptr = 0;
return parseViewBoxInternal<LChar>(document, ptr, ptr, viewBox, true);
}
if (string.is8Bit()) {
const LChar* ptr = string.characters8();
const LChar* end = ptr + string.length();
return parseViewBox(document, ptr, end, viewBox, true);
}
const UChar* ptr = string.characters16();
const UChar* end = ptr + string.length();
return parseViewBox(document, ptr, end, viewBox, true);
}
AffineTransform SVGFitToViewBox::viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatio& preserveAspectRatio, float viewWidth, float viewHeight)
{
if (!viewBoxRect.width() || !viewBoxRect.height())
return AffineTransform();
return preserveAspectRatio.getCTM(viewBoxRect.x(), viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(), viewWidth, viewHeight);
}
bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
{
return attrName == SVGNames::viewBoxAttr || attrName == SVGNames::preserveAspectRatioAttr;
}
void SVGFitToViewBox::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
{
supportedAttributes.add(SVGNames::viewBoxAttr);
supportedAttributes.add(SVGNames::preserveAspectRatioAttr);
}
}
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