1 /*

     2  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public License

    15  * along with this library; see the file COPYING.LIB.  If not, write to

    16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    17  * Boston, MA 02110-1301, USA.

    18  *

    19  */

    20 

    21 #ifndef RenderSVGResource_h

    22 #define RenderSVGResource_h

    23 

    24 #if ENABLE(SVG)

    25 #include "SVGDocumentExtensions.h"

    26 

    27 namespace WebCore {

    28 

    29 enum RenderSVGResourceType {

    30     MaskerResourceType,

    31     MarkerResourceType,

    32     PatternResourceType,

    33     LinearGradientResourceType,

    34     RadialGradientResourceType,

    35     SolidColorResourceType,

    36     FilterResourceType,

    37     ClipperResourceType

    38 };

    39 

    40 enum RenderSVGResourceMode {

    41     ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern

    42     ApplyToFillMode    = 1 << 1,

    43     ApplyToStrokeMode  = 1 << 2,

    44     ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode

    45 };

    46 

    47 class Color;

    48 class FloatRect;

    49 class GraphicsContext;

    50 class RenderObject;

    51 class RenderStyle;

    52 class RenderSVGResourceSolidColor;

    53 

    54 class RenderSVGResource {

    55 public:

    56     RenderSVGResource() { }

    57     virtual ~RenderSVGResource() { }

    58 

    59     virtual void invalidateClients() = 0;

    60     virtual void invalidateClient(RenderObject*) = 0;

    61 

    62     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) = 0;

    63     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short) { }

    64     virtual FloatRect resourceBoundingBox(RenderObject*) = 0;

    65 

    66     virtual RenderSVGResourceType resourceType() const = 0;

    67 

    68     template<class Renderer>

    69     Renderer* cast()

    70     {

    71         if (Renderer::s_resourceType == resourceType())

    72             return static_cast<Renderer*>(this);

    73 

    74         return 0;

    75     }

    76 

    77     // Helper utilities used in the render tree to access resources used for painting shapes/text (gradients & patterns only)

    78     static RenderSVGResource* fillPaintingResource(const RenderObject*, const RenderStyle*);

    79     static RenderSVGResource* strokePaintingResource(const RenderObject*, const RenderStyle*);

    80     static RenderSVGResourceSolidColor* sharedSolidPaintingResource();

    81 

    82     static void invalidateAllResourcesOfRenderer(RenderObject*);

    83     static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);

    84 

    85 private:

    86     static void adjustColorForPseudoRules(const RenderStyle*, bool useFillPaint, Color&);

    87     

    88 protected:

    89     void markForLayoutAndResourceInvalidation(RenderObject*, bool needsBoundariesUpdate = true);

    90 };

    91 

    92 }

    93 

    94 #endif

    95 #endif