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      1 /*
      2  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifndef ShapeValue_h
     31 #define ShapeValue_h
     32 
     33 #include "core/fetch/ImageResource.h"
     34 #include "core/rendering/style/BasicShapes.h"
     35 #include "core/rendering/style/RenderStyleConstants.h"
     36 #include "core/rendering/style/StyleImage.h"
     37 #include "wtf/PassRefPtr.h"
     38 
     39 namespace blink {
     40 
     41 class ShapeValue : public RefCounted<ShapeValue> {
     42 public:
     43     enum ShapeValueType {
     44         // The Auto value is defined by a null ShapeValue*
     45         Shape,
     46         Box,
     47         Image
     48     };
     49 
     50     static PassRefPtr<ShapeValue> createShapeValue(PassRefPtr<BasicShape> shape, CSSBoxType cssBox)
     51     {
     52         return adoptRef(new ShapeValue(shape, cssBox));
     53     }
     54 
     55     static PassRefPtr<ShapeValue> createBoxShapeValue(CSSBoxType cssBox)
     56     {
     57         return adoptRef(new ShapeValue(cssBox));
     58     }
     59 
     60     static PassRefPtr<ShapeValue> createImageValue(PassRefPtr<StyleImage> image)
     61     {
     62         return adoptRef(new ShapeValue(image));
     63     }
     64 
     65     ShapeValueType type() const { return m_type; }
     66     BasicShape* shape() const { return m_shape.get(); }
     67 
     68     StyleImage* image() const { return m_image.get(); }
     69     bool isImageValid() const
     70     {
     71         if (!image())
     72             return false;
     73         if (image()->isImageResource() || image()->isImageResourceSet())
     74             return image()->cachedImage() && image()->cachedImage()->hasImage();
     75         return image()->isGeneratedImage();
     76     }
     77     void setImage(PassRefPtr<StyleImage> image)
     78     {
     79         ASSERT(type() == Image);
     80         if (m_image != image)
     81             m_image = image;
     82     }
     83     CSSBoxType cssBox() const { return m_cssBox; }
     84 
     85     bool operator==(const ShapeValue& other) const;
     86 
     87 private:
     88     ShapeValue(PassRefPtr<BasicShape> shape, CSSBoxType cssBox)
     89         : m_type(Shape)
     90         , m_shape(shape)
     91         , m_cssBox(cssBox)
     92     {
     93     }
     94     ShapeValue(ShapeValueType type)
     95         : m_type(type)
     96         , m_cssBox(BoxMissing)
     97     {
     98     }
     99     ShapeValue(PassRefPtr<StyleImage> image)
    100         : m_type(Image)
    101         , m_image(image)
    102         , m_cssBox(ContentBox)
    103     {
    104     }
    105     ShapeValue(CSSBoxType cssBox)
    106         : m_type(Box)
    107         , m_cssBox(cssBox)
    108     {
    109     }
    110 
    111 
    112     ShapeValueType m_type;
    113     RefPtr<BasicShape> m_shape;
    114     RefPtr<StyleImage> m_image;
    115     CSSBoxType m_cssBox;
    116 };
    117 
    118 inline bool ShapeValue::operator==(const ShapeValue& other) const
    119 {
    120     if (type() != other.type())
    121         return false;
    122 
    123     switch (type()) {
    124     case Shape:
    125         return shape() == other.shape() && cssBox() == other.cssBox();
    126     case Box:
    127         return cssBox() == other.cssBox();
    128     case Image:
    129         return image() == other.image();
    130     }
    131 
    132     ASSERT_NOT_REACHED();
    133     return false;
    134 }
    135 
    136 }
    137 
    138 #endif
    139