It is time.

ui/base/x/selection_owner.h

-// 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 UI_BASE_X_SELECTION_OWNER_H_
-#define UI_BASE_X_SELECTION_OWNER_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/memory/ref_counted_memory.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "ui/base/ui_base_export.h"
-#include "ui/base/x/selection_utils.h"
-#include "ui/gfx/x/x11_atom_cache.h"
-#include "ui/gfx/x/x11_types.h"
-
-namespace ui {
-
-// Owns a specific X11 selection on an X window.
-//
-// The selection owner object keeps track of which xwindow is the current
-// owner, and when its |xwindow_|, offers different data types to other
-// processes.
-class UI_BASE_EXPORT SelectionOwner {
- public:
-  SelectionOwner(XDisplay* xdisplay,
-                 XID xwindow,
-                 XAtom selection_name);
-  ~SelectionOwner();
-
-  // Returns the current selection data. Useful for fast paths.
-  const SelectionFormatMap& selection_format_map() { return format_map_; }
-
-  // Appends a list of types we're offering to |targets|.
-  void RetrieveTargets(std::vector<XAtom>* targets);
-
-  // Attempts to take ownership of the selection. If we're successful, present
-  // |data| to other windows.
-  void TakeOwnershipOfSelection(const SelectionFormatMap& data);
-
-  // Clears our internal format map and clears the selection owner, whether we
-  // own the selection or not.
-  void ClearSelectionOwner();
-
-  // It is our owner's responsibility to plumb X11 events on |xwindow_| to us.
-  void OnSelectionRequest(const XEvent& event);
-  void OnSelectionClear(const XEvent& event);
-
-  // Returns true if SelectionOwner can process the XPropertyEvent event,
-  // |event|.
-  bool CanDispatchPropertyEvent(const XEvent& event);
-
-  void OnPropertyEvent(const XEvent& event);
-
- private:
-  // Holds state related to an incremental data transfer.
-  struct IncrementalTransfer {
-    IncrementalTransfer(XID window,
-                        XAtom target,
-                        XAtom property,
-                        const scoped_refptr<base::RefCountedMemory>& data,
-                        int offset,
-                        base::TimeTicks timeout,
-                        int foreign_window_manager_id);
-    ~IncrementalTransfer();
-
-    // Parameters from the XSelectionRequest. The data is transferred over
-    // |property| on |window|.
-    XID window;
-    XAtom target;
-    XAtom property;
-
-    // The data to be transferred.
-    scoped_refptr<base::RefCountedMemory> data;
-
-    // The offset from the beginning of |data| of the first byte to be
-    // transferred in the next chunk.
-    size_t offset;
-
-    // Time when the transfer should be aborted because the selection requestor
-    // is taking too long to notify us that we can send the next chunk.
-    base::TimeTicks timeout;
-
-    // Used to unselect PropertyChangeMask on |window| when we are done with
-    // the data transfer.
-    int foreign_window_manager_id;
-  };
-
-  // Attempts to convert the selection to |target|. If the conversion is
-  // successful, true is returned and the result is stored in the |property|
-  // of |requestor|.
-  bool ProcessTarget(XAtom target, XID requestor, XAtom property);
-
-  // Sends the next chunk of data for given the incremental data transfer.
-  void ProcessIncrementalTransfer(IncrementalTransfer* transfer);
-
-  // Aborts any incremental data transfers which have timed out.
-  void AbortStaleIncrementalTransfers();
-
-  // Called when the transfer at |it| has completed to do cleanup.
-  void CompleteIncrementalTransfer(
-      std::vector<IncrementalTransfer>::iterator it);
-
-  // Returns the incremental data transfer, if any, which was waiting for
-  // |event|.
-  std::vector<IncrementalTransfer>::iterator FindIncrementalTransferForEvent(
-      const XEvent& event);
-
-  // Our X11 state.
-  XDisplay* x_display_;
-  XID x_window_;
-
-  // The X11 selection that this instance communicates on.
-  XAtom selection_name_;
-
-  // The maximum size of data we can put in XChangeProperty().
-  size_t max_request_size_;
-
-  // The data we are currently serving.
-  SelectionFormatMap format_map_;
-
-  std::vector<IncrementalTransfer> incremental_transfers_;
-
-  // Used to abort stale incremental data transfers.
-  base::RepeatingTimer<SelectionOwner> incremental_transfer_abort_timer_;
-
-  X11AtomCache atom_cache_;
-
-  DISALLOW_COPY_AND_ASSIGN(SelectionOwner);
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_X_SELECTION_OWNER_H_