C++ SVGPaint类代码示例

SVGPaintServer* KSVGPainterFactory::strokePaintServer(const RenderStyle* style, const RenderObject* item)
{
    if (!style->svgStyle()->hasStroke())
        return 0;

    SVGPaint* stroke = style->svgStyle()->strokePaint();

    SVGPaintServer* strokePaintServer = 0;
    if (stroke->paintType() == SVGPaint::SVG_PAINTTYPE_URI) {
        AtomicString id(SVGURIReference::getTarget(stroke->uri()));
        strokePaintServer = getPaintServerById(item->document(), id);

        SVGElement* svgElement = static_cast<SVGElement*>(item->element());
        ASSERT(svgElement && svgElement->document() && svgElement->isStyled());
 
        if (item->isRenderPath() && strokePaintServer)
            strokePaintServer->addClient(static_cast<SVGStyledElement*>(svgElement));
        else if (!strokePaintServer)
            svgElement->document()->accessSVGExtensions()->addPendingResource(id, static_cast<SVGStyledElement*>(svgElement)); 
    } else {
        strokePaintServer = sharedSolidPaintServer();
        SVGPaintServerSolid* strokePaintServerSolid = static_cast<SVGPaintServerSolid*>(strokePaintServer);
        if (stroke->paintType() == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR)
            strokePaintServerSolid->setColor(style->color());
        else
            strokePaintServerSolid->setColor(stroke->color());
        // FIXME: Ideally invalid colors would never get set on the RenderStyle and this could turn into an ASSERT
        if (!strokePaintServerSolid->color().isValid())
            strokePaintServer = 0;
    }

    return strokePaintServer;
}

static v8::Handle<v8::Value> setUriCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.SVGPaint.setUri");
    if (args.Length() < 1)
        return throwError("Not enough arguments", V8Proxy::TypeError);
    SVGPaint* imp = V8SVGPaint::toNative(args.Holder());
    STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, uri, MAYBE_MISSING_PARAMETER(args, 0, MissingIsUndefined));
    imp->setUri(uri);
    return v8::Handle<v8::Value>();
}

RenderSVGResource* RenderSVGResource::strokePaintingResource(const RenderObject* object, const RenderStyle* style)
{
    ASSERT(object);
    ASSERT(style);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    if (!svgStyle || !svgStyle->hasStroke())
        return 0;

    SVGPaint* strokePaint = svgStyle->strokePaint();
    ASSERT(strokePaint);

    RenderSVGResource* strokePaintingResource = 0;
    FloatRect objectBoundingBox = object->objectBoundingBox();

    SVGPaint::SVGPaintType paintType = strokePaint->paintType();
    if (!objectBoundingBox.isEmpty()
        && (paintType == SVGPaint::SVG_PAINTTYPE_URI || paintType == SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR)) {
        AtomicString id(SVGURIReference::getTarget(strokePaint->uri()));
        strokePaintingResource = getRenderSVGResourceContainerById(object->document(), id);

        if (!strokePaintingResource)
            registerPendingResource(id, paintType, object);
    }

    if (paintType != SVGPaint::SVG_PAINTTYPE_URI && !strokePaintingResource) {
        RenderSVGResourceSolidColor* solidResource = sharedSolidPaintingResource();
        strokePaintingResource = solidResource;

        Color strokeColor;
        if (strokePaint->paintType() == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR)
            strokeColor = style->visitedDependentColor(CSSPropertyColor);
        else
            strokeColor = strokePaint->color();

        adjustColorForPseudoRules(style, false /* useFillPaint */, strokeColor);

        // FIXME: Ideally invalid colors would never get set on the RenderStyle and this could turn into an ASSERT
        if (strokeColor.isValid())
            solidResource->setColor(strokeColor);
        else
            strokePaintingResource = 0;
    }

    if (!strokePaintingResource) {
        // default value (black), see bug 11017
        RenderSVGResourceSolidColor* solidResource = sharedSolidPaintingResource();
        solidResource->setColor(Color::black);
        strokePaintingResource = solidResource;
    }

    return strokePaintingResource;
}

// FIXME: This method and strokePaintingResource() should be refactored, to share even more code
RenderSVGResource* RenderSVGResource::fillPaintingResource(RenderObject* object, const RenderStyle* style)
{
    ASSERT(object);
    ASSERT(style);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    if (!svgStyle || !svgStyle->hasFill())
        return 0;

    SVGPaint* fillPaint = svgStyle->fillPaint();
    ASSERT(fillPaint);

    RenderSVGResource* fillPaintingResource = 0;

    SVGPaint::SVGPaintType paintType = fillPaint->paintType();
    if (paintType == SVGPaint::SVG_PAINTTYPE_URI || paintType == SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR) {
        if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object))
            fillPaintingResource = resources->fill();
    }

    if (paintType != SVGPaint::SVG_PAINTTYPE_URI && !fillPaintingResource) {
        RenderSVGResourceSolidColor* solidResource = sharedSolidPaintingResource();
        fillPaintingResource = solidResource;

        Color fillColor;
        if (fillPaint->paintType() == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR)
            fillColor = style->visitedDependentColor(CSSPropertyColor);
        else
            fillColor = fillPaint->color();

        adjustColorForPseudoRules(style, true /* useFillPaint */, fillColor);

        // FIXME: Ideally invalid colors would never get set on the RenderStyle and this could turn into an ASSERT
        if (fillColor.isValid())
            solidResource->setColor(fillColor);
        else
            fillPaintingResource = 0;
    }

    if (!fillPaintingResource) {
        // default value (black), see bug 11017
        RenderSVGResourceSolidColor* solidResource = sharedSolidPaintingResource();
        solidResource->setColor(Color::black);
        fillPaintingResource = solidResource;
    }

    return fillPaintingResource;
}

JSValue JSC_HOST_CALL jsSVGPaintPrototypeFunctionSetPaint(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.inherits(&JSSVGPaint::s_info))
        return throwError(exec, TypeError);
    JSSVGPaint* castedThisObj = static_cast<JSSVGPaint*>(asObject(thisValue));
    SVGPaint* imp = static_cast<SVGPaint*>(castedThisObj->impl());
    ExceptionCode ec = 0;
    SVGPaint::SVGPaintType paintType = static_cast<SVGPaint::SVGPaintType>(args.at(0).toInt32(exec));
    const UString& uri = args.at(1).toString(exec);
    const UString& rgbColor = args.at(2).toString(exec);
    const UString& iccColor = args.at(3).toString(exec);

    imp->setPaint(paintType, uri, rgbColor, iccColor, ec);
    setDOMException(exec, ec);
    return jsUndefined();
}

inline void RenderSVGResource::adjustColorForPseudoRules(const RenderStyle* style, bool useFillPaint, Color& color)
{
    if (style->insideLink() != InsideVisitedLink)
        return;

    RenderStyle* visitedStyle = style->getCachedPseudoStyle(VISITED_LINK);
    SVGPaint* visitedPaint = useFillPaint ? visitedStyle->svgStyle()->fillPaint() : visitedStyle->svgStyle()->strokePaint();
    if (visitedPaint->paintType() == SVGPaint::SVG_PAINTTYPE_URI)
        return;

    Color visitedColor;
    if (visitedPaint->paintType() == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR)
        visitedColor = visitedStyle->color();
    else
        visitedColor = visitedPaint->color();

    if (visitedColor.isValid())
        color = Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), color.alpha());
}

static v8::Handle<v8::Value> setPaintCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.SVGPaint.setPaint");
    if (args.Length() < 4)
        return throwError("Not enough arguments", V8Proxy::TypeError);
    SVGPaint* imp = V8SVGPaint::toNative(args.Holder());
    ExceptionCode ec = 0;
    {
    EXCEPTION_BLOCK(int, paintType, toUInt32(MAYBE_MISSING_PARAMETER(args, 0, MissingIsUndefined)));
    STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, uri, MAYBE_MISSING_PARAMETER(args, 1, MissingIsUndefined));
    STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, rgbColor, MAYBE_MISSING_PARAMETER(args, 2, MissingIsUndefined));
    STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, iccColor, MAYBE_MISSING_PARAMETER(args, 3, MissingIsUndefined));
    imp->setPaint(paintType, uri, rgbColor, iccColor, ec);
    if (UNLIKELY(ec))
        goto fail;
    return v8::Handle<v8::Value>();
    }
    fail:
    V8Proxy::setDOMException(ec);
    return v8::Handle<v8::Value>();
}

SVGPaintServer* SVGPaintServer::fillPaintServer(const RenderStyle* style, const RenderObject* item)
{
    if (!style->svgStyle()->hasFill())
        return 0;

    SVGPaint* fill = style->svgStyle()->fillPaint();

    SVGPaintServer* fillPaintServer = 0;
    SVGPaint::SVGPaintType paintType = fill->paintType();
    if (paintType == SVGPaint::SVG_PAINTTYPE_URI ||
        paintType == SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR) {
        AtomicString id(SVGURIReference::getTarget(fill->uri()));
        fillPaintServer = getPaintServerById(item->document(), id);

        SVGElement* svgElement = static_cast<SVGElement*>(item->node());
        ASSERT(svgElement && svgElement->document() && svgElement->isStyled());

        if (item->isRenderPath() && fillPaintServer)
            fillPaintServer->addClient(static_cast<SVGStyledElement*>(svgElement));
        else if (!fillPaintServer && paintType == SVGPaint::SVG_PAINTTYPE_URI)
            svgElement->document()->accessSVGExtensions()->addPendingResource(id, static_cast<SVGStyledElement*>(svgElement)); 
    }
    if (paintType != SVGPaint::SVG_PAINTTYPE_URI && !fillPaintServer) {
        fillPaintServer = sharedSolidPaintServer();
        SVGPaintServerSolid* fillPaintServerSolid = static_cast<SVGPaintServerSolid*>(fillPaintServer);
        if (paintType == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR)
            fillPaintServerSolid->setColor(style->color());
        else
            fillPaintServerSolid->setColor(fill->color());
        // FIXME: Ideally invalid colors would never get set on the RenderStyle and this could turn into an ASSERT
        if (!fillPaintServerSolid->color().isValid())
            fillPaintServer = 0;
    }
    if (!fillPaintServer) {
        // default value (black), see bug 11017
        fillPaintServer = sharedSolidPaintServer();
        static_cast<SVGPaintServerSolid*>(fillPaintServer)->setColor(Color::black);
    }
    return fillPaintServer;
}

void
SVGPaintParser::ScanBackupPaint(SVGPaint &paint)
{
    SVGColor color;
    if (tokenizer.Scan("none"))
    {
		paint.SetPaintType(SVGPaint::URI_NONE);
    }
    else if (tokenizer.Scan("currentColor"))
    {
		paint.SetPaintType(SVGPaint::URI_CURRENT_COLOR);
    }
    else if (ScanColor(color))
    {
		paint.SetPaintType(SVGPaint::URI_RGBCOLOR);
		paint.SetColorRef(color.GetColorRef());
    }
    else
    {
		status = OpStatus::ERR;
    }
}

//.........这里部分代码省略.........
        case CSSPropertyFillRule:
        {
            HANDLE_INHERIT_AND_INITIAL(fillRule, FillRule)
            if (primitiveValue)
                svgstyle->setFillRule(*primitiveValue);
            break;
        }
        case CSSPropertyStrokeLinejoin:
        {
            HANDLE_INHERIT_AND_INITIAL(joinStyle, JoinStyle)
            if (primitiveValue)
                svgstyle->setJoinStyle(*primitiveValue);
            break;
        }
        case CSSPropertyShapeRendering:
        {
            HANDLE_INHERIT_AND_INITIAL(shapeRendering, ShapeRendering)
            if (primitiveValue)
                svgstyle->setShapeRendering(*primitiveValue);
            break;
        }
        // end of ident only properties
        case CSSPropertyFill:
        {
            if (isInherit) {
                const SVGRenderStyle* svgParentStyle = state.parentStyle()->svgStyle();
                svgstyle->setFillPaint(svgParentStyle->fillPaintType(), svgParentStyle->fillPaintColor(), svgParentStyle->fillPaintUri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
                return;
            }
            if (isInitial) {
                svgstyle->setFillPaint(SVGRenderStyle::initialFillPaintType(), SVGRenderStyle::initialFillPaintColor(), SVGRenderStyle::initialFillPaintUri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
                return;
            }
            if (value->isSVGPaint()) {
                SVGPaint* svgPaint = static_cast<SVGPaint*>(value);
                svgstyle->setFillPaint(svgPaint->paintType(), colorFromSVGColorCSSValue(svgPaint, state.style()->color()), svgPaint->uri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
            }
            break;
        }
        case CSSPropertyStroke:
        {
            if (isInherit) {
                const SVGRenderStyle* svgParentStyle = state.parentStyle()->svgStyle();
                svgstyle->setStrokePaint(svgParentStyle->strokePaintType(), svgParentStyle->strokePaintColor(), svgParentStyle->strokePaintUri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
                return;
            }
            if (isInitial) {
                svgstyle->setStrokePaint(SVGRenderStyle::initialStrokePaintType(), SVGRenderStyle::initialStrokePaintColor(), SVGRenderStyle::initialStrokePaintUri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
                return;
            }
            if (value->isSVGPaint()) {
                SVGPaint* svgPaint = static_cast<SVGPaint*>(value);
                svgstyle->setStrokePaint(svgPaint->paintType(), colorFromSVGColorCSSValue(svgPaint, state.style()->color()), svgPaint->uri(), applyPropertyToRegularStyle(), applyPropertyToVisitedLinkStyle());
            }
            break;
        }
        case CSSPropertyStrokeWidth:
        {
            HANDLE_INHERIT_AND_INITIAL(strokeWidth, StrokeWidth)
            if (primitiveValue)
                svgstyle->setStrokeWidth(SVGLength::fromCSSPrimitiveValue(primitiveValue));
            break;
        }
        case CSSPropertyStrokeDasharray:
        {
            HANDLE_INHERIT_AND_INITIAL(strokeDashArray, StrokeDashArray)

static inline RenderSVGResource* requestPaintingResource(RenderSVGResourceMode mode, RenderObject* object, const RenderStyle* style, Color& fallbackColor)
{
    ASSERT(object);
    ASSERT(style);

    // If we have no style at all, ignore it.
    const SVGRenderStyle* svgStyle = style->svgStyle();
    if (!svgStyle)
        return 0;

    // If we have no fill/stroke, return 0.
    if (mode == ApplyToFillMode) {
        if (!svgStyle->hasFill())
            return 0;
    } else {
        if (!svgStyle->hasStroke())
            return 0;
    }

    SVGPaint* paint = mode == ApplyToFillMode ? svgStyle->fillPaint() : svgStyle->strokePaint();
    ASSERT(paint);

    SVGPaint::SVGPaintType paintType = paint->paintType();
    if (paintType == SVGPaint::SVG_PAINTTYPE_NONE)
        return 0;

    Color color;
    if (paintType == SVGPaint::SVG_PAINTTYPE_RGBCOLOR
        || paintType == SVGPaint::SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR
        || paintType == SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR
        || paintType == SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR)
        color = paint->color();
    else if (paintType == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR || paintType == SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR)
        color = style->visitedDependentColor(CSSPropertyColor);

    if (style->insideLink() == InsideVisitedLink) {
        RenderStyle* visitedStyle = style->getCachedPseudoStyle(VISITED_LINK);
        ASSERT(visitedStyle);

        if (SVGPaint* visitedPaint = mode == ApplyToFillMode ? visitedStyle->svgStyle()->fillPaint() : visitedStyle->svgStyle()->strokePaint()) {
            // For SVG_PAINTTYPE_CURRENTCOLOR, 'color' already contains the 'visitedColor'.
            if (visitedPaint->paintType() < SVGPaint::SVG_PAINTTYPE_URI_NONE && visitedPaint->paintType() != SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR) {
                const Color& visitedColor = visitedPaint->color();
                if (visitedColor.isValid())
                    color = Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), color.alpha());
            }
        }
    }

    // If the primary resource is just a color, return immediately.
    RenderSVGResourceSolidColor* colorResource = RenderSVGResource::sharedSolidPaintingResource();
    if (paintType < SVGPaint::SVG_PAINTTYPE_URI_NONE) {
        // If an invalid fill color is specified, fallback to fill/stroke="none".
        if (!color.isValid())
            return 0;

        colorResource->setColor(color);
        return colorResource;
    }

    // If no resources are associated with the given renderer, return the color resource.
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (!resources) {
        // If a paint server is specified, and no or an invalid fallback color is given, default to fill/stroke="black".
        if (!color.isValid())
            color = Color::black;

        colorResource->setColor(color);
        return colorResource;
    }

    // If the requested resource is not available, return the color resource.
    RenderSVGResource* uriResource = mode == ApplyToFillMode ? resources->fill() : resources->stroke();
    if (!uriResource) {
        // If a paint server is specified, and no or an invalid fallback color is given, default to fill/stroke="black".
        if (!color.isValid())
            color = Color::black;

        colorResource->setColor(color);
        return colorResource;
    }

    // The paint server resource exists, though it may be invalid (pattern with width/height=0). Pass the fallback color to our caller
    // so it can use the solid color painting resource, if applyResource() on the URI resource failed.
    fallbackColor = color;
    return uriResource;
}

static v8::Handle<v8::Value> uriAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    INC_STATS("DOM.SVGPaint.uri._get");
    SVGPaint* imp = V8SVGPaint::toNative(info.Holder());
    return v8String(imp->uri());
}

static v8::Handle<v8::Value> paintTypeAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
    INC_STATS("DOM.SVGPaint.paintType._get");
    SVGPaint* imp = V8SVGPaint::toNative(info.Holder());
    return v8::Integer::New(imp->paintType());
}