1 files changed, 115 insertions, 0 deletions
diff --git a/Source/WebCore/svg/SVGFitToViewBox.cpp b/Source/WebCore/svg/SVGFitToViewBox.cpp
new file mode 100644
index 0000000..fadb982
--- /dev/null
+++ b/Source/WebCore/svg/SVGFitToViewBox.cpp
@@ -0,0 +1,115 @@
+/*
+ * 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"
+
+#if ENABLE(SVG)
+#include "SVGFitToViewBox.h"
+
+#include "AffineTransform.h"
+#include "Attr.h"
+#include "Document.h"
+#include "FloatRect.h"
+#include "SVGDocumentExtensions.h"
+#include "SVGNames.h"
+#include "SVGParserUtilities.h"
+#include "SVGPreserveAspectRatio.h"
+#include <wtf/text/StringImpl.h>
+
+namespace WebCore {
+
+bool SVGFitToViewBox::parseViewBox(Document* doc, const String& s, FloatRect& viewBox)
+{
+    const UChar* c = s.characters();
+    const UChar* end = c + s.length();
+    return parseViewBox(doc, c, end, viewBox, true);
+}
+
+bool SVGFitToViewBox::parseViewBox(Document* doc, const UChar*& c, const UChar* end, FloatRect& viewBox, bool validate)
+{
+    String str(c, end - c);
+
+    skipOptionalSpaces(c, end);
+
+    float x = 0.0f;
+    float y = 0.0f;
+    float width = 0.0f;
+    float height = 0.0f;
+    bool valid = parseNumber(c, end, x) && parseNumber(c, end, y) && parseNumber(c, end, width) && parseNumber(c, end, height, false);
+    if (!validate) {
+        viewBox = FloatRect(x, y, width, height);
+        return true;
+    }
+    if (!valid) {
+        doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
+        return false;
+    }
+
+    if (width < 0.0) { // check that width is positive
+        doc->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
+        return false;
+    }
+    if (height < 0.0) { // check that height is positive
+        doc->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
+        return false;
+    }
+    skipOptionalSpaces(c, end);
+    if (c < end) { // nothing should come after the last, fourth number
+        doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
+        return false;
+    }
+
+    viewBox = FloatRect(x, y, width, height);
+    return 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::parseMappedAttribute(Document* document, Attribute* attr)
+{
+    if (attr->name() == SVGNames::viewBoxAttr) {
+        FloatRect viewBox;
+        if (!attr->value().isNull()) {
+            if (!parseViewBox(document, attr->value(), viewBox))
+                return true;
+        }
+        setViewBoxBaseValue(viewBox);
+    } else if (attr->name() == SVGNames::preserveAspectRatioAttr) {
+        SVGPreserveAspectRatio::parsePreserveAspectRatio(this, attr->value());
+        return true;
+    }
+
+    return false;
+}
+
+bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
+{
+    return attrName == SVGNames::viewBoxAttr || attrName == SVGNames::preserveAspectRatioAttr;
+}
+
+}
+
+#endif // ENABLE(SVG)