| /* |
| * 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 "SVGNames.h" |
| #include "core/dom/Attribute.h" |
| #include "core/dom/Document.h" |
| #include "core/svg/SVGDocumentExtensions.h" |
| #include "core/svg/SVGParserUtilities.h" |
| #include "core/svg/SVGPreserveAspectRatio.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); |
| } |
| |
| } |