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// Copyright (c) 2012 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.
#include "remoting/host/clipboard.h"
#include <X11/Xlib.h>
#include "base/bind.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "remoting/host/linux/x_server_clipboard.h"
#include "remoting/proto/event.pb.h"
#include "remoting/protocol/clipboard_stub.h"
namespace remoting {
// This code is expected to be called on the desktop thread only.
class ClipboardX11 : public Clipboard,
public base::MessageLoopForIO::Watcher {
public:
ClipboardX11();
virtual ~ClipboardX11();
// Clipboard interface.
virtual void Start(
scoped_ptr<protocol::ClipboardStub> client_clipboard) OVERRIDE;
virtual void InjectClipboardEvent(
const protocol::ClipboardEvent& event) OVERRIDE;
virtual void Stop() OVERRIDE;
// MessageLoopForIO::Watcher interface.
virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
private:
void OnClipboardChanged(const std::string& mime_type,
const std::string& data);
void PumpXEvents();
scoped_ptr<protocol::ClipboardStub> client_clipboard_;
// Underlying X11 clipboard implementation.
XServerClipboard x_server_clipboard_;
// Connection to the X server, used by |x_server_clipboard_|. This is created
// and owned by this class.
Display* display_;
// Watcher used to handle X11 events from |display_|.
base::MessageLoopForIO::FileDescriptorWatcher x_connection_watcher_;
DISALLOW_COPY_AND_ASSIGN(ClipboardX11);
};
ClipboardX11::ClipboardX11()
: display_(NULL) {
}
ClipboardX11::~ClipboardX11() {
Stop();
}
void ClipboardX11::Start(
scoped_ptr<protocol::ClipboardStub> client_clipboard) {
// TODO(lambroslambrou): Share the X connection with InputInjector.
display_ = XOpenDisplay(NULL);
if (!display_) {
LOG(ERROR) << "Couldn't open X display";
return;
}
client_clipboard_.swap(client_clipboard);
x_server_clipboard_.Init(display_,
base::Bind(&ClipboardX11::OnClipboardChanged,
base::Unretained(this)));
base::MessageLoopForIO::current()->WatchFileDescriptor(
ConnectionNumber(display_),
true,
base::MessageLoopForIO::WATCH_READ,
&x_connection_watcher_,
this);
PumpXEvents();
}
void ClipboardX11::InjectClipboardEvent(
const protocol::ClipboardEvent& event) {
x_server_clipboard_.SetClipboard(event.mime_type(), event.data());
}
void ClipboardX11::Stop() {
client_clipboard_.reset();
x_connection_watcher_.StopWatchingFileDescriptor();
if (display_) {
XCloseDisplay(display_);
display_ = NULL;
}
}
void ClipboardX11::OnFileCanReadWithoutBlocking(int fd) {
PumpXEvents();
}
void ClipboardX11::OnFileCanWriteWithoutBlocking(int fd) {
}
void ClipboardX11::OnClipboardChanged(const std::string& mime_type,
const std::string& data) {
protocol::ClipboardEvent event;
event.set_mime_type(mime_type);
event.set_data(data);
if (client_clipboard_.get()) {
client_clipboard_->InjectClipboardEvent(event);
}
}
void ClipboardX11::PumpXEvents() {
DCHECK(display_);
while (XPending(display_)) {
XEvent event;
XNextEvent(display_, &event);
x_server_clipboard_.ProcessXEvent(&event);
}
}
scoped_ptr<Clipboard> Clipboard::Create() {
return scoped_ptr<Clipboard>(new ClipboardX11());
}
} // namespace remoting
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