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// Copyright 2014 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 UI_BASE_X_X11_FOREIGN_WINDOW_MANAGER_H_
#define UI_BASE_X_X11_FOREIGN_WINDOW_MANAGER_H_
#include <map>
#include <vector>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/base/ui_base_export.h"
#include "ui/gfx/x/x11_types.h"
// A process wide singleton for selecting events on X windows which were not
// created by Chrome.
namespace base {
template <typename T> struct DefaultSingletonTraits;
}
namespace ui {
// Manages the events that Chrome has selected on X windows which were not
// created by Chrome. This class allows several clients to select events
// on the same X window.
class UI_BASE_EXPORT XForeignWindowManager {
public:
static XForeignWindowManager* GetInstance();
// Requests that events associated with |event_mask| on |xid| be reported to
// Chrome. Returns an id to use for canceling the request.
int RequestEvents(XID xid, long event_mask) WARN_UNUSED_RESULT;
// Cancels the request with |request_id|. Unless there is another request for
// events on the X window associated with |request_id|, this stops Chrome from
// getting events for the X window.
void CancelRequest(int request_id);
// Called by X11DesktopHandler when |xid| is destroyed.
void OnWindowDestroyed(XID xid);
private:
friend struct base::DefaultSingletonTraits<XForeignWindowManager>;
struct Request {
Request(int request_id, long entry_event_mask);
~Request();
int request_id;
long event_mask;
};
XForeignWindowManager();
~XForeignWindowManager();
// Updates which events are selected on |xid|.
void UpdateSelectedEvents(XID xid);
// The id of the next request.
int next_request_id_;
typedef std::vector<Request> RequestVector;
std::map<XID, RequestVector> request_map_;
DISALLOW_COPY_AND_ASSIGN(XForeignWindowManager);
};
} // namespace ui
#endif // UI_BASE_X_X11_FOREIGN_WINDOW_MANAGER_H_
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