Source/WebCore/rendering/RenderEmbeddedObject.h

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Simon Hausmann <hausmann@kde.org>
 * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010, 2012 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 <WebCore/RenderWidget.h>

namespace WebCore {

class LayoutSize;
class MouseEvent;
class TextRun;

enum class PluginUnavailabilityReason : uint8_t {
    PluginMissing,
    PluginCrashed,
    PluginBlockedByContentSecurityPolicy,
    InsecurePluginVersion,
    UnsupportedPlugin,
    PluginTooSmall
};

// Renderer for embeds and objects, often, but not always, rendered via plug-ins.
// For example, <embed src="foo.html"> does not invoke a plug-in.
class RenderEmbeddedObject final : public RenderWidget {
    WTF_MAKE_TZONE_ALLOCATED(RenderEmbeddedObject);
    WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RenderEmbeddedObject);
public:
    RenderEmbeddedObject(HTMLFrameOwnerElement&, RenderStyle&&);
    virtual ~RenderEmbeddedObject();

    PluginUnavailabilityReason pluginUnavailabilityReason() const { return m_pluginUnavailabilityReason; };
    WEBCORE_EXPORT void setPluginUnavailabilityReason(PluginUnavailabilityReason);

    bool isPluginUnavailable() const { return m_isPluginUnavailable; }

    void handleUnavailablePluginIndicatorEvent(Event*);

    bool requiresAcceleratedCompositing() const override;

    ScrollableArea* scrollableArea() const;
    bool usesAsyncScrolling() const;
    std::optional<ScrollingNodeID> scrollingNodeID() const;
    void willAttachScrollingNode();
    void didAttachScrollingNode();

    bool paintsContent() const final;

    void setHasShadowContent() { m_hasShadowContent = true; }

private:
    void paintReplaced(PaintInfo&, const LayoutPoint&) final;
    void paint(PaintInfo&, const LayoutPoint&) final;

    CursorDirective getCursor(const LayoutPoint&, Cursor&) const final;

    void layout() final;
    void willBeDestroyed() final;

    ASCIILiteral renderName() const final { return "RenderEmbeddedObject"_s; }

    bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) final;

    bool scroll(ScrollDirection, ScrollGranularity, unsigned stepCount = 1, Element** stopElement = nullptr, RenderBox* startBox = nullptr, const IntPoint& wheelEventAbsolutePoint = IntPoint()) final;
    bool logicalScroll(ScrollLogicalDirection, ScrollGranularity, unsigned stepCount, Element** stopElement) final;

    void setUnavailablePluginIndicatorIsPressed(bool);
    bool isInUnavailablePluginIndicator(const MouseEvent&) const;
    bool isInUnavailablePluginIndicator(const FloatPoint&) const;
    void getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, FloatRect& indicatorRect, FloatRect& replacementTextRect, FloatRect& arrowRect, FontCascade&, TextRun&, float& textWidth) const;
    LayoutRect getReplacementTextGeometry(const LayoutPoint& accumulatedOffset) const;

    bool canHaveChildren() const override { return m_hasShadowContent; }

    bool m_isPluginUnavailable;
    PluginUnavailabilityReason m_pluginUnavailabilityReason;
    String m_unavailablePluginReplacementText;
    bool m_unavailablePluginIndicatorIsPressed;
    bool m_mouseDownWasInUnavailablePluginIndicator;
    String m_unavailabilityDescription;
    bool m_hasShadowContent { false };
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderEmbeddedObject, isRenderEmbeddedObject())