/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef DummyPageHolder_h
#define DummyPageHolder_h

#include "core/loader/FrameLoaderClient.h"
#include "core/page/Page.h"
#include "platform/geometry/IntSize.h"
#include "platform/heap/Handle.h"
#include "wtf/Allocator.h"
#include "wtf/Noncopyable.h"
#include <memory>

namespace blink {

class Document;
class LocalFrame;
class FrameView;
class IntSize;
class Settings;

typedef void (*FrameSettingOverrideFunction)(Settings&);

extern void RootLayerScrollsFrameSettingOverride(Settings&);

// Creates a dummy Page, LocalFrame, and FrameView whose clients are all no-op.
//
// This class can be used when you write unit tests for components which do not work correctly without layoutObjects.
// To make sure the layoutObjects are created, you need to call |frameView().layout()| after you add nodes into
// |document()|.
//
// Since DummyPageHolder stores empty clients in it, it must outlive the Page, LocalFrame, FrameView and any other objects
// created by it. DummyPageHolder's destructor ensures this condition by checking remaining references to the LocalFrame.

class DummyPageHolder {
    WTF_MAKE_NONCOPYABLE(DummyPageHolder);
    USING_FAST_MALLOC(DummyPageHolder);
public:
    static std::unique_ptr<DummyPageHolder> create(
        const IntSize& initialViewSize = IntSize(),
        Page::PageClients* = 0,
        FrameLoaderClient* = nullptr,
        FrameSettingOverrideFunction = nullptr);
    ~DummyPageHolder();

    Page& page() const;
    LocalFrame& frame() const;
    FrameView& frameView() const;
    Document& document() const;

private:
    DummyPageHolder(const IntSize& initialViewSize, Page::PageClients*, FrameLoaderClient*, FrameSettingOverrideFunction settingOverrider);

    Persistent<Page> m_page;
    Persistent<LocalFrame> m_frame;

    Persistent<FrameLoaderClient> m_frameLoaderClient;
};

} // namespace blink

#endif // DummyPageHolder_h
