Move RenderSVGResource into the inheritance hierarchy

Source/core/rendering/svg/RenderSVGResource.cpp

-/*
- * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
- * Copyright (C) 2007 Rob Buis <buis@kde.org>
- * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
- * 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.
- */
-
-#include "config.h"
-#include "core/rendering/svg/RenderSVGResource.h"
-
-#include "core/rendering/style/RenderStyle.h"
-#include "core/rendering/svg/RenderSVGResourceContainer.h"
-#include "core/rendering/svg/SVGResources.h"
-#include "core/rendering/svg/SVGResourcesCache.h"
-#include "platform/graphics/GraphicsContext.h"
-#include "platform/graphics/GraphicsContextStateSaver.h"
-
-namespace blink {
-
-SVGPaintServer::SVGPaintServer(Color color)
-    : m_color(color)
-{
-}
-
-SVGPaintServer::SVGPaintServer(PassRefPtr<Gradient> gradient)
-    : m_gradient(gradient)
-    , m_color(Color::black)
-{
-}
-
-SVGPaintServer::SVGPaintServer(PassRefPtr<Pattern> pattern)
-    : m_pattern(pattern)
-    , m_color(Color::black)
-{
-}
-
-void SVGPaintServer::apply(GraphicsContext& context, RenderSVGResourceMode resourceMode, GraphicsContextStateSaver* stateSaver)
-{
-    ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode);
-    if (stateSaver && (m_gradient || m_pattern))
-        stateSaver->saveIfNeeded();
-
-    if (resourceMode == ApplyToFillMode) {
-        if (m_pattern)
-            context.setFillPattern(m_pattern);
-        else if (m_gradient)
-            context.setFillGradient(m_gradient);
-        else
-            context.setFillColor(m_color);
-    } else {
-        if (m_pattern)
-            context.setStrokePattern(m_pattern);
-        else if (m_gradient)
-            context.setStrokeGradient(m_gradient);
-        else
-            context.setStrokeColor(m_color);
-    }
-}
-
-void SVGPaintServer::prependTransform(const AffineTransform& transform)
-{
-    ASSERT(m_gradient || m_pattern);
-    if (m_pattern)
-        m_pattern->setPatternSpaceTransform(transform * m_pattern->patternSpaceTransform());
-    else
-        m_gradient->setGradientSpaceTransform(transform * m_gradient->gradientSpaceTransform());
-}
-
-static SVGPaintDescription requestPaint(const RenderObject& object, const RenderStyle* style, RenderSVGResourceMode mode)
-{
-    ASSERT(style);
-
-    // If we have no style at all, ignore it.
-    const SVGRenderStyle& svgStyle = style->svgStyle();
-
-    // If we have no fill/stroke, return 0.
-    if (mode == ApplyToFillMode) {
-        if (!svgStyle.hasFill())
-            return SVGPaintDescription();
-    } else {
-        if (!svgStyle.hasStroke())
-            return SVGPaintDescription();
-    }
-
-    bool applyToFill = mode == ApplyToFillMode;
-    SVGPaintType paintType = applyToFill ? svgStyle.fillPaintType() : svgStyle.strokePaintType();
-    ASSERT(paintType != SVG_PAINTTYPE_NONE);
-
-    Color color;
-    bool hasColor = false;
-    switch (paintType) {
-    case SVG_PAINTTYPE_CURRENTCOLOR:
-    case SVG_PAINTTYPE_RGBCOLOR:
-    case SVG_PAINTTYPE_URI_CURRENTCOLOR:
-    case SVG_PAINTTYPE_URI_RGBCOLOR:
-        color = applyToFill ? svgStyle.fillPaintColor() : svgStyle.strokePaintColor();
-        hasColor = true;
-    default:
-        break;
-    }
-
-    if (style->insideLink() == InsideVisitedLink) {
-        // FIXME: This code doesn't support the uri component of the visited link paint, https://bugs.webkit.org/show_bug.cgi?id=70006
-        SVGPaintType visitedPaintType = applyToFill ? svgStyle.visitedLinkFillPaintType() : svgStyle.visitedLinkStrokePaintType();
-
-        // For SVG_PAINTTYPE_CURRENTCOLOR, 'color' already contains the 'visitedColor'.
-        if (visitedPaintType < SVG_PAINTTYPE_URI_NONE && visitedPaintType != SVG_PAINTTYPE_CURRENTCOLOR) {
-            const Color& visitedColor = applyToFill ? svgStyle.visitedLinkFillPaintColor() : svgStyle.visitedLinkStrokePaintColor();
-            color = Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), color.alpha());
-            hasColor = true;
-        }
-    }
-
-    // If the primary resource is just a color, return immediately.
-    if (paintType < SVG_PAINTTYPE_URI_NONE) {
-        // |paintType| will be either <current-color> or <rgb-color> here - both of which will have a color.
-        ASSERT(hasColor);
-        return SVGPaintDescription(color);
-    }
-
-    RenderSVGResource* uriResource = 0;
-    if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(&object))
-        uriResource = applyToFill ? resources->fill() : resources->stroke();
-
-    // If the requested resource is not available, return the color resource or 'none'.
-    if (!uriResource) {
-        // The fallback is 'none'. (SVG2 say 'none' is implied when no fallback is specified.)
-        if (paintType == SVG_PAINTTYPE_URI_NONE || !hasColor)
-            return SVGPaintDescription();
-
-        return SVGPaintDescription(color);
-    }
-
-    // The paint server resource exists, though it may be invalid (pattern with width/height=0).
-    // Return the fallback color to our caller so it can use it, if
-    // preparePaintServer() on the resource container failed.
-    if (hasColor)
-        return SVGPaintDescription(uriResource, color);
-
-    return SVGPaintDescription(uriResource);
-}
-
-SVGPaintServer SVGPaintServer::requestForRenderer(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
-{
-    ASSERT(style);
-    ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode);
-
-    SVGPaintDescription paintDescription = requestPaint(renderer, style, resourceMode);
-    if (!paintDescription.isValid)
-        return invalid();
-    if (!paintDescription.resource)
-        return SVGPaintServer(paintDescription.color);
-    SVGPaintServer paintServer = paintDescription.resource->preparePaintServer(renderer);
-    if (paintServer.isValid())
-        return paintServer;
-    if (paintDescription.hasFallback)
-        return SVGPaintServer(paintDescription.color);
-    return invalid();
-}
-
-bool SVGPaintServer::existsForRenderer(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
-{
-    return requestPaint(renderer, style, resourceMode).isValid;
-}
-
-SVGPaintServer RenderSVGResource::preparePaintServer(const RenderObject&)
-{
-    ASSERT_NOT_REACHED();
-    return SVGPaintServer::invalid();
-}
-
-SVGPaintDescription RenderSVGResource::requestPaintDescription(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
-{
-    return requestPaint(renderer, style, resourceMode);
-}
-
-}