RenderSVGGradientStop.h   [plain text]

/*
 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
 * Copyright (C) 2009 Google, Inc.
 * Copyright (C) 2014 Apple Inc. 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.
 */

#pragma once

#include "RenderElement.h"
#include "SVGStopElement.h"

namespace WebCore {
    
class SVGGradientElement;

// This class exists mostly so we can hear about gradient stop style changes
class RenderSVGGradientStop final : public RenderElement {
    WTF_MAKE_ISO_ALLOCATED(RenderSVGGradientStop);
public:
    RenderSVGGradientStop(SVGStopElement&, RenderStyle&&);
    virtual ~RenderSVGGradientStop();

    SVGStopElement& element() const { return downcast<SVGStopElement>(RenderObject::nodeForNonAnonymous()); }

private:
    void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;

    void layout() override;

    // These overrides are needed to prevent ASSERTs on <svg><stop /></svg>
    // RenderObject's default implementations ASSERT_NOT_REACHED()
    // https://bugs.webkit.org/show_bug.cgi?id=20400
    LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject*) const override { return LayoutRect(); }
    FloatRect objectBoundingBox() const override { return FloatRect(); }
    FloatRect strokeBoundingBox() const override { return FloatRect(); }
    FloatRect repaintRectInLocalCoordinates() const override { return FloatRect(); }
    bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint&, HitTestAction) override { return false; }

    bool isSVGGradientStop() const override { return true; }
    const char* renderName() const override { return "RenderSVGGradientStop"; }

    bool canHaveChildren() const override { return false; }
    void paint(PaintInfo&, const LayoutPoint&) override { }

    SVGGradientElement* gradientElement();
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderSVGGradientStop, isSVGGradientStop())