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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
#define WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/threading/non_thread_safe.h"
#include "ipc/ipc_channel_proxy.h"
#include "ipc/ipc_listener.h"
#include "ipc/ipc_sender.h"
#include "ui/gfx/native_widget_types.h"
namespace base {
class SingleThreadTaskRunner;
class WaitableEvent;
}
namespace IPC {
class Message;
}
namespace win8 {
// Abstract base class for various Metro viewer process host implementations.
class MetroViewerProcessHost : public IPC::Listener,
public IPC::Sender,
public base::NonThreadSafe {
public:
// Initializes a viewer process host to connect to the Metro viewer process
// over IPC. The given task runner correspond to a thread on which
// IPC::Channel is created and used (e.g. IO thread). Instantly connects to
// the viewer process if one is already connected to |ipc_channel_name|; a
// viewer can otherwise be launched synchronously via
// LaunchViewerAndWaitForConnection().
explicit MetroViewerProcessHost(
base::SingleThreadTaskRunner* ipc_task_runner);
virtual ~MetroViewerProcessHost();
// Returns the process id of the viewer process if one is connected to this
// host, returns base::kNullProcessId otherwise.
base::ProcessId GetViewerProcessId();
// Launches the viewer process associated with the given |app_user_model_id|
// and blocks until that viewer process connects or until a timeout is
// reached. Returns true if the viewer process connects before the timeout is
// reached. NOTE: this assumes that the app referred to by |app_user_model_id|
// is registered as the default browser.
bool LaunchViewerAndWaitForConnection(
const base::string16& app_user_model_id);
private:
// IPC::Sender implementation:
virtual bool Send(IPC::Message* msg) OVERRIDE;
// IPC::Listener implementation:
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void OnChannelError() OVERRIDE = 0;
// Called over IPC by the viewer process to tell this host that it should be
// drawing to |target_surface|.
virtual void OnSetTargetSurface(gfx::NativeViewId target_surface) = 0;
// Called over IPC by the viewer process to request that the url passed in be
// opened.
virtual void OnOpenURL(const string16& url) = 0;
// Called over IPC by the viewer process to request that the search string
// passed in is passed to the default search provider and a URL navigation be
// performed.
virtual void OnHandleSearchRequest(const string16& search_string) = 0;
// Called over IPC by the viewer process when the window size has changed.
virtual void OnWindowSizeChanged(uint32 width, uint32 height) = 0;
void NotifyChannelConnected();
// Inner message filter used to handle connection event on the IPC channel
// proxy's background thread. This prevents consumers of
// MetroViewerProcessHost from having to pump messages on their own message
// loop.
class InternalMessageFilter : public IPC::ChannelProxy::MessageFilter {
public:
InternalMessageFilter(MetroViewerProcessHost* owner);
// IPC::ChannelProxy::MessageFilter implementation.
virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
private:
MetroViewerProcessHost* owner_;
DISALLOW_COPY_AND_ASSIGN(InternalMessageFilter);
};
scoped_ptr<IPC::ChannelProxy> channel_;
scoped_ptr<base::WaitableEvent> channel_connected_event_;
DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost);
};
} // namespace win8
#endif // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
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