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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_FACTORY_H_
#define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_FACTORY_H_
#include <stdint.h>
#include <memory>
#include "base/memory/safe_ref.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace content {
class FrameTree;
class RenderWidgetHostDelegate;
class RenderWidgetHostImpl;
class SiteInstanceGroup;
// A factory for creating RenderWidgetHostImpls. There is a global factory
// function that can be installed for the purposes of testing to provide a
// specialized RenderWidgetHostImpl class.
class RenderWidgetHostFactory {
public:
RenderWidgetHostFactory(const RenderWidgetHostFactory&) = delete;
RenderWidgetHostFactory& operator=(const RenderWidgetHostFactory&) = delete;
// Creates a RenderWidgetHostImpl using the currently registered factory, or
// the default one if no factory is registered. Ownership of the returned
// pointer will be passed to the caller.
static std::unique_ptr<RenderWidgetHostImpl> Create(
FrameTree* frame_tree,
RenderWidgetHostDelegate* delegate,
viz::FrameSinkId frame_sink_id,
base::SafeRef<SiteInstanceGroup> site_instance_group,
int32_t routing_id,
bool hidden,
bool renderer_initiated_creation);
// Returns true if there is currently a globally-registered factory.
static bool has_factory() { return !!factory_; }
protected:
RenderWidgetHostFactory() = default;
virtual ~RenderWidgetHostFactory() = default;
// You can derive from this class and specify an implementation for this
// function to create a different kind of RenderWidgetHostImpl for testing.
virtual std::unique_ptr<RenderWidgetHostImpl> CreateRenderWidgetHost(
FrameTree* frame_tree,
RenderWidgetHostDelegate* delegate,
viz::FrameSinkId frame_sink_id,
base::SafeRef<SiteInstanceGroup> site_instance_group,
int32_t routing_id,
bool hidden) = 0;
// Registers your factory to be called when new RenderWidgetHostImpls are
// created. We have only one global factory, so there must be no factory
// registered before the call. This class does NOT take ownership of the
// pointer.
CONTENT_EXPORT static void RegisterFactory(RenderWidgetHostFactory* factory);
// Unregister the previously registered factory. With no factory registered,
// the default RenderWidgetHostImpls will be created.
CONTENT_EXPORT static void UnregisterFactory();
private:
// The current globally registered factory. This is NULL when we should
// create the default RenderWidgetHostImpls.
CONTENT_EXPORT static RenderWidgetHostFactory* factory_;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_FACTORY_H_
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