/*
    Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                  2004, 2005 Rob Buis <buis@kde.org>
    Copyright (C) 2005, 2006 Apple Computer, Inc.
    Copyright (C) Research In Motion Limited 2010. All rights reserved.

    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.
*/

#ifndef SVGRenderStyle_h
#define SVGRenderStyle_h

#if ENABLE(SVG)
#include "CSSValueList.h"
#include "DataRef.h"
#include "GraphicsTypes.h"
#include "Path.h"
#include "RenderStyleConstants.h"
#include "SVGPaint.h"
#include "SVGRenderStyleDefs.h"

namespace WebCore {

class FloatRect;
class IntRect;
class RenderObject;

class SVGRenderStyle : public RefCounted<SVGRenderStyle> {    
public:
    static PassRefPtr<SVGRenderStyle> create() { return adoptRef(new SVGRenderStyle); }
    PassRefPtr<SVGRenderStyle> copy() const { return adoptRef(new SVGRenderStyle(*this));}
    ~SVGRenderStyle();

    bool inheritedNotEqual(const SVGRenderStyle*) const;
    void inheritFrom(const SVGRenderStyle*);

    // FIXME: These functions should move to ShadowData.
    void inflateForShadow(IntRect&) const;
    void inflateForShadow(FloatRect&) const;

    StyleDifference diff(const SVGRenderStyle*) const;

    bool operator==(const SVGRenderStyle&) const;
    bool operator!=(const SVGRenderStyle& o) const { return !(*this == o); }

    // SVG CSS Properties
    SVG_RS_DEFINE_ATTRIBUTE(EAlignmentBaseline, AlignmentBaseline, alignmentBaseline, AB_AUTO)
    SVG_RS_DEFINE_ATTRIBUTE(EDominantBaseline, DominantBaseline, dominantBaseline, DB_AUTO)
    SVG_RS_DEFINE_ATTRIBUTE(EBaselineShift, BaselineShift, baselineShift, BS_BASELINE)
    SVG_RS_DEFINE_ATTRIBUTE(EVectorEffect, VectorEffect, vectorEffect, VE_NONE)

    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(LineCap, CapStyle, capStyle, ButtCap)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(WindRule, ClipRule, clipRule, RULE_NONZERO)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EColorInterpolation, ColorInterpolation, colorInterpolation, CI_SRGB)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EColorInterpolation, ColorInterpolationFilters, colorInterpolationFilters, CI_LINEARRGB)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EColorRendering, ColorRendering, colorRendering, CR_AUTO)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(WindRule, FillRule, fillRule, RULE_NONZERO)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EImageRendering, ImageRendering, imageRendering, IR_AUTO)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(LineJoin, JoinStyle, joinStyle, MiterJoin)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EShapeRendering, ShapeRendering, shapeRendering, SR_AUTO)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(ETextAnchor, TextAnchor, textAnchor, TA_START)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EWritingMode, WritingMode, writingMode, WM_LRTB)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EGlyphOrientation, GlyphOrientationHorizontal, glyphOrientationHorizontal, GO_0DEG)
    SVG_RS_DEFINE_ATTRIBUTE_INHERITED(EGlyphOrientation, GlyphOrientationVertical, glyphOrientationVertical, GO_AUTO)

    // SVG CSS Properties (using DataRef's)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(float, fill, opacity, FillOpacity, fillOpacity, 1.0f)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(SVGPaint, fill, paint, FillPaint, fillPaint, SVGPaint::defaultFill())

    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(float, stroke, opacity, StrokeOpacity, strokeOpacity, 1.0f)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(SVGPaint, stroke, paint, StrokePaint, strokePaint, SVGPaint::defaultStroke())
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(CSSValueList, stroke, dashArray, StrokeDashArray, strokeDashArray, 0)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(float, stroke, miterLimit, StrokeMiterLimit, strokeMiterLimit, 4.0f)
    
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(CSSValue, stroke, width, StrokeWidth, strokeWidth, 0)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(CSSValue, stroke, dashOffset, StrokeDashOffset, strokeDashOffset, 0);

    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(CSSValue, text, kerning, Kerning, kerning, 0)

    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(float, stops, opacity, StopOpacity, stopOpacity, 1.0f)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(Color, stops, color, StopColor, stopColor, Color(0, 0, 0))    

    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(float, misc, floodOpacity, FloodOpacity, floodOpacity, 1.0f)
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(Color, misc, floodColor, FloodColor, floodColor, Color(0, 0, 0))
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(Color, misc, lightingColor, LightingColor, lightingColor, Color(255, 255, 255))
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_REFCOUNTED(CSSValue, misc, baselineShiftValue, BaselineShiftValue, baselineShiftValue, 0)

    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL_OWNPTR(ShadowData, shadowSVG, shadow, Shadow, shadow, 0)

    // Non-inherited resources
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, resources, clipper, ClipperResource, clipperResource, String())
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, resources, filter, FilterResource, filterResource, String())
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, resources, masker, MaskerResource, maskerResource, String())

    // Inherited resources
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, inheritedResources, markerStart, MarkerStartResource, markerStartResource, String())
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, inheritedResources, markerMid, MarkerMidResource, markerMidResource, String())
    SVG_RS_DEFINE_ATTRIBUTE_DATAREF_WITH_INITIAL(String, inheritedResources, markerEnd, MarkerEndResource, markerEndResource, String())

    // convenience
    bool hasClipper() const { return !clipperResource().isEmpty(); }
    bool hasMasker() const { return !maskerResource().isEmpty(); }
    bool hasFilter() const { return !filterResource().isEmpty(); }
    bool hasMarkers() const { return !markerStartResource().isEmpty() || !markerMidResource().isEmpty() || !markerEndResource().isEmpty(); }
    bool hasStroke() const { return strokePaint()->paintType() != SVGPaint::SVG_PAINTTYPE_NONE; }
    bool hasFill() const { return fillPaint()->paintType() != SVGPaint::SVG_PAINTTYPE_NONE; }

    static float cssPrimitiveToLength(const RenderObject*, CSSValue*, float defaultValue = 0.0f);

protected:
    // inherit
    struct InheritedFlags {
        bool operator==(const InheritedFlags& other) const
        {
            return (_colorRendering == other._colorRendering)
                && (_imageRendering == other._imageRendering)
                && (_shapeRendering == other._shapeRendering)
                && (_clipRule == other._clipRule)
                && (_fillRule == other._fillRule)
                && (_capStyle == other._capStyle)
                && (_joinStyle == other._joinStyle)
                && (_textAnchor == other._textAnchor)
                && (_colorInterpolation == other._colorInterpolation)
                && (_colorInterpolationFilters == other._colorInterpolationFilters)
                && (_writingMode == other._writingMode)
                && (_glyphOrientationHorizontal == other._glyphOrientationHorizontal)
                && (_glyphOrientationVertical == other._glyphOrientationVertical);
        }

        bool operator!=(const InheritedFlags& other) const
        {
            return !(*this == other);
        }

        unsigned _colorRendering : 2; // EColorRendering
        unsigned _imageRendering : 2; // EImageRendering 
        unsigned _shapeRendering : 2; // EShapeRendering 
        unsigned _clipRule : 1; // WindRule
        unsigned _fillRule : 1; // WindRule
        unsigned _capStyle : 2; // LineCap
        unsigned _joinStyle : 2; // LineJoin
        unsigned _textAnchor : 2; // ETextAnchor
        unsigned _colorInterpolation : 2; // EColorInterpolation
        unsigned _colorInterpolationFilters : 2; // EColorInterpolation
        unsigned _writingMode : 3; // EWritingMode
        unsigned _glyphOrientationHorizontal : 3; // EGlyphOrientation
        unsigned _glyphOrientationVertical : 3; // EGlyphOrientation
    } svg_inherited_flags;

    // don't inherit
    struct NonInheritedFlags {
        // 32 bit non-inherited, don't add to the struct, or the operator will break.
        bool operator==(const NonInheritedFlags &other) const { return _niflags == other._niflags; }
        bool operator!=(const NonInheritedFlags &other) const { return _niflags != other._niflags; }

        union {
            struct {
                unsigned _alignmentBaseline : 4; // EAlignmentBaseline 
                unsigned _dominantBaseline : 4; // EDominantBaseline
                unsigned _baselineShift : 2; // EBaselineShift
                unsigned _vectorEffect: 1; // EVectorEffect
                // 21 bits unused
            } f;
            uint32_t _niflags;
        };
    } svg_noninherited_flags;

    // inherited attributes
    DataRef<StyleFillData> fill;
    DataRef<StyleStrokeData> stroke;
    DataRef<StyleTextData> text;
    DataRef<StyleInheritedResourceData> inheritedResources;

    // non-inherited attributes
    DataRef<StyleStopData> stops;
    DataRef<StyleMiscData> misc;
    DataRef<StyleShadowSVGData> shadowSVG;
    DataRef<StyleResourceData> resources;

private:
    enum CreateDefaultType { CreateDefault };
        
    SVGRenderStyle();
    SVGRenderStyle(const SVGRenderStyle&);
    SVGRenderStyle(CreateDefaultType); // Used to create the default style.

    void setBitDefaults()
    {
        svg_inherited_flags._clipRule = initialClipRule();
        svg_inherited_flags._colorRendering = initialColorRendering();
        svg_inherited_flags._fillRule = initialFillRule();
        svg_inherited_flags._imageRendering = initialImageRendering();
        svg_inherited_flags._shapeRendering = initialShapeRendering();
        svg_inherited_flags._textAnchor = initialTextAnchor();
        svg_inherited_flags._capStyle = initialCapStyle();
        svg_inherited_flags._joinStyle = initialJoinStyle();
        svg_inherited_flags._colorInterpolation = initialColorInterpolation();
        svg_inherited_flags._colorInterpolationFilters = initialColorInterpolationFilters();
        svg_inherited_flags._writingMode = initialWritingMode();
        svg_inherited_flags._glyphOrientationHorizontal = initialGlyphOrientationHorizontal();
        svg_inherited_flags._glyphOrientationVertical = initialGlyphOrientationVertical();

        svg_noninherited_flags._niflags = 0;
        svg_noninherited_flags.f._alignmentBaseline = initialAlignmentBaseline();
        svg_noninherited_flags.f._dominantBaseline = initialDominantBaseline();
        svg_noninherited_flags.f._baselineShift = initialBaselineShift();
        svg_noninherited_flags.f._vectorEffect = initialVectorEffect();
    }
};

} // namespace WebCore

#endif // ENABLE(SVG)
#endif // SVGRenderStyle_h
