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      1 /*
      2  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org>
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef SVGTransform_h
     22 #define SVGTransform_h
     23 
     24 #include "core/svg/properties/SVGProperty.h"
     25 #include "platform/geometry/FloatPoint.h"
     26 #include "platform/transforms/AffineTransform.h"
     27 #include "wtf/text/WTFString.h"
     28 
     29 namespace blink {
     30 
     31 class FloatSize;
     32 class SVGTransformTearOff;
     33 
     34 enum SVGTransformType {
     35     SVG_TRANSFORM_UNKNOWN = 0,
     36     SVG_TRANSFORM_MATRIX = 1,
     37     SVG_TRANSFORM_TRANSLATE = 2,
     38     SVG_TRANSFORM_SCALE = 3,
     39     SVG_TRANSFORM_ROTATE = 4,
     40     SVG_TRANSFORM_SKEWX = 5,
     41     SVG_TRANSFORM_SKEWY = 6
     42 };
     43 
     44 class SVGTransform : public SVGPropertyBase {
     45 public:
     46     typedef SVGTransformTearOff TearOffType;
     47 
     48     enum ConstructionMode {
     49         ConstructIdentityTransform,
     50         ConstructZeroTransform
     51     };
     52 
     53     static PassRefPtr<SVGTransform> create()
     54     {
     55         return adoptRef(new SVGTransform());
     56     }
     57 
     58     static PassRefPtr<SVGTransform> create(SVGTransformType type, ConstructionMode mode = ConstructIdentityTransform)
     59     {
     60         return adoptRef(new SVGTransform(type, mode));
     61     }
     62 
     63     static PassRefPtr<SVGTransform> create(const AffineTransform& affineTransform)
     64     {
     65         return adoptRef(new SVGTransform(affineTransform));
     66     }
     67 
     68     virtual ~SVGTransform();
     69 
     70     PassRefPtr<SVGTransform> clone() const;
     71     virtual PassRefPtr<SVGPropertyBase> cloneForAnimation(const String&) const OVERRIDE;
     72 
     73     SVGTransformType transformType() const { return m_transformType; }
     74 
     75     const AffineTransform& matrix() const { return m_matrix; }
     76 
     77     // |onMatrixChange| must be called after modifications via |mutableMatrix|.
     78     AffineTransform* mutableMatrix() { return &m_matrix; }
     79     void onMatrixChange();
     80 
     81     float angle() const { return m_angle; }
     82     FloatPoint rotationCenter() const { return m_center; }
     83 
     84     void setMatrix(const AffineTransform&);
     85     void setTranslate(float tx, float ty);
     86     void setScale(float sx, float sy);
     87     void setRotate(float angle, float cx, float cy);
     88     void setSkewX(float angle);
     89     void setSkewY(float angle);
     90 
     91     // Internal use only (animation system)
     92     FloatPoint translate() const;
     93     FloatSize scale() const;
     94 
     95     virtual String valueAsString() const OVERRIDE;
     96 
     97     virtual void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) OVERRIDE;
     98     virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> from, PassRefPtr<SVGPropertyBase> to, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) OVERRIDE;
     99     virtual float calculateDistance(PassRefPtr<SVGPropertyBase> to, SVGElement* contextElement) OVERRIDE;
    100 
    101     static AnimatedPropertyType classType() { return AnimatedTransform; }
    102 
    103 private:
    104     SVGTransform();
    105     SVGTransform(SVGTransformType, ConstructionMode);
    106     explicit SVGTransform(const AffineTransform&);
    107     SVGTransform(SVGTransformType, float, const FloatPoint&, const AffineTransform&);
    108 
    109     SVGTransformType m_transformType;
    110     float m_angle;
    111     FloatPoint m_center;
    112     AffineTransform m_matrix;
    113 };
    114 
    115 } // namespace blink
    116 
    117 #endif
    118