1 files changed, 211 insertions, 0 deletions
diff --git a/Source/WebCore/svg/SVGTransformable.cpp b/Source/WebCore/svg/SVGTransformable.cpp
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+++ b/Source/WebCore/svg/SVGTransformable.cpp
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+/*
+ * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
+ * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.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 "SVGTransformable.h"
+
+#include "AffineTransform.h"
+#include "FloatConversion.h"
+#include "SVGNames.h"
+#include "SVGParserUtilities.h"
+#include "SVGStyledElement.h"
+#include "SVGTransformList.h"
+
+namespace WebCore {
+
+static int parseTransformParamList(const UChar*& ptr, const UChar* end, float* values, int required, int optional)
+{
+    int optionalParams = 0, requiredParams = 0;
+    
+    if (!skipOptionalSpaces(ptr, end) || *ptr != '(')
+        return -1;
+    
+    ptr++;
+   
+    skipOptionalSpaces(ptr, end);
+
+    while (requiredParams < required) {
+        if (ptr >= end || !parseNumber(ptr, end, values[requiredParams], false))
+            return -1;
+        requiredParams++;
+        if (requiredParams < required)
+            skipOptionalSpacesOrDelimiter(ptr, end);
+    }
+    if (!skipOptionalSpaces(ptr, end))
+        return -1;
+    
+    bool delimParsed = skipOptionalSpacesOrDelimiter(ptr, end);
+
+    if (ptr >= end)
+        return -1;
+    
+    if (*ptr == ')') { // skip optionals
+        ptr++;
+        if (delimParsed)
+            return -1;
+    } else {
+        while (optionalParams < optional) {
+            if (ptr >= end || !parseNumber(ptr, end, values[requiredParams + optionalParams], false))
+                return -1;
+            optionalParams++;
+            if (optionalParams < optional)
+                skipOptionalSpacesOrDelimiter(ptr, end);
+        }
+        
+        if (!skipOptionalSpaces(ptr, end))
+            return -1;
+        
+        delimParsed = skipOptionalSpacesOrDelimiter(ptr, end);
+        
+        if (ptr >= end || *ptr != ')' || delimParsed)
+            return -1;
+        ptr++;
+    }
+
+    return requiredParams + optionalParams;
+}
+
+// These should be kept in sync with enum SVGTransformType
+static const int requiredValuesForType[] =  {0, 6, 1, 1, 1, 1, 1};
+static const int optionalValuesForType[] =  {0, 0, 1, 1, 2, 0, 0};
+
+bool SVGTransformable::parseTransformValue(unsigned type, const UChar*& ptr, const UChar* end, SVGTransform& transform)
+{
+    if (type == SVGTransform::SVG_TRANSFORM_UNKNOWN)
+        return false;
+
+    int valueCount = 0;
+    float values[] = {0, 0, 0, 0, 0, 0};
+    if ((valueCount = parseTransformParamList(ptr, end, values, requiredValuesForType[type], optionalValuesForType[type])) < 0)
+        return false;
+
+    switch (type) {
+    case SVGTransform::SVG_TRANSFORM_SKEWX:
+        transform.setSkewX(values[0]);
+        break;
+    case SVGTransform::SVG_TRANSFORM_SKEWY:
+        transform.setSkewY(values[0]);
+        break;
+    case SVGTransform::SVG_TRANSFORM_SCALE:
+        if (valueCount == 1) // Spec: if only one param given, assume uniform scaling
+            transform.setScale(values[0], values[0]);
+        else
+            transform.setScale(values[0], values[1]);
+        break;
+    case SVGTransform::SVG_TRANSFORM_TRANSLATE:
+        if (valueCount == 1) // Spec: if only one param given, assume 2nd param to be 0
+            transform.setTranslate(values[0], 0);
+        else
+            transform.setTranslate(values[0], values[1]);
+        break;
+    case SVGTransform::SVG_TRANSFORM_ROTATE:
+        if (valueCount == 1)
+            transform.setRotate(values[0], 0, 0);
+        else
+            transform.setRotate(values[0], values[1], values[2]);
+        break;
+    case SVGTransform::SVG_TRANSFORM_MATRIX:
+        transform.setMatrix(AffineTransform(values[0], values[1], values[2], values[3], values[4], values[5]));
+        break;
+    }
+
+    return true;
+}
+
+static const UChar skewXDesc[] =  {'s', 'k', 'e', 'w', 'X'};
+static const UChar skewYDesc[] =  {'s', 'k', 'e', 'w', 'Y'};
+static const UChar scaleDesc[] =  {'s', 'c', 'a', 'l', 'e'};
+static const UChar translateDesc[] =  {'t', 'r', 'a', 'n', 's', 'l', 'a', 't', 'e'};
+static const UChar rotateDesc[] =  {'r', 'o', 't', 'a', 't', 'e'};
+static const UChar matrixDesc[] =  {'m', 'a', 't', 'r', 'i', 'x'};
+
+static inline bool parseAndSkipType(const UChar*& currTransform, const UChar* end, unsigned short& type)
+{
+    if (currTransform >= end)
+        return false;
+
+    if (*currTransform == 's') {
+        if (skipString(currTransform, end, skewXDesc, WTF_ARRAY_LENGTH(skewXDesc)))
+            type = SVGTransform::SVG_TRANSFORM_SKEWX;
+        else if (skipString(currTransform, end, skewYDesc, WTF_ARRAY_LENGTH(skewYDesc)))
+            type = SVGTransform::SVG_TRANSFORM_SKEWY;
+        else if (skipString(currTransform, end, scaleDesc, WTF_ARRAY_LENGTH(scaleDesc)))
+            type = SVGTransform::SVG_TRANSFORM_SCALE;
+        else
+            return false;
+    } else if (skipString(currTransform, end, translateDesc, WTF_ARRAY_LENGTH(translateDesc)))
+        type = SVGTransform::SVG_TRANSFORM_TRANSLATE;
+    else if (skipString(currTransform, end, rotateDesc, WTF_ARRAY_LENGTH(rotateDesc)))
+        type = SVGTransform::SVG_TRANSFORM_ROTATE;
+    else if (skipString(currTransform, end, matrixDesc, WTF_ARRAY_LENGTH(matrixDesc)))
+        type = SVGTransform::SVG_TRANSFORM_MATRIX;
+    else
+        return false;
+
+    return true;
+}
+
+bool SVGTransformable::parseTransformAttribute(SVGTransformList& list, const AtomicString& transform)
+{
+    const UChar* start = transform.characters();
+    return parseTransformAttribute(list, start, start + transform.length());
+}
+
+bool SVGTransformable::parseTransformAttribute(SVGTransformList& list, const UChar*& currTransform, const UChar* end, TransformParsingMode mode)
+{
+    if (mode == ClearList)
+        list.clear();
+
+    bool delimParsed = false;
+    while (currTransform < end) {
+        delimParsed = false;
+        unsigned short type = SVGTransform::SVG_TRANSFORM_UNKNOWN;
+        skipOptionalSpaces(currTransform, end);
+
+        if (!parseAndSkipType(currTransform, end, type))
+            return false;
+
+        SVGTransform transform;
+        if (!parseTransformValue(type, currTransform, end, transform))
+            return false;
+
+        list.append(transform);
+        skipOptionalSpaces(currTransform, end);
+        if (currTransform < end && *currTransform == ',') {
+            delimParsed = true;
+            ++currTransform;
+        }
+        skipOptionalSpaces(currTransform, end);
+    }
+
+    return !delimParsed;
+}
+
+bool SVGTransformable::isKnownAttribute(const QualifiedName& attrName)
+{
+    return attrName == SVGNames::transformAttr;
+}
+
+}
+
+#endif // ENABLE(SVG)