Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef ASH_WM_MRU_WINDOW_TRACKER_H_ |
| 6 | #define ASH_WM_MRU_WINDOW_TRACKER_H_ |
| 7 | |
| 8 | #include <list> |
| 9 | #include <vector> |
| 10 | |
| 11 | #include "ash/ash_export.h" |
| 12 | #include "base/basictypes.h" |
| 13 | #include "base/memory/scoped_ptr.h" |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 14 | #include "ui/aura/window_observer.h" |
Ben Murdoch | effb81e | 2014-03-31 11:51:25 +0100 | [diff] [blame] | 15 | #include "ui/wm/public/activation_change_observer.h" |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 16 | |
| 17 | namespace aura { |
| 18 | class RootWindow; |
| 19 | class Window; |
| 20 | namespace client { |
| 21 | class ActivationClient; |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | namespace ash { |
| 26 | |
| 27 | // Maintains a most recently used list of windows. This is used for window |
| 28 | // cycling using Alt+Tab and overview mode. |
| 29 | class ASH_EXPORT MruWindowTracker |
| 30 | : public aura::client::ActivationChangeObserver, |
| 31 | public aura::WindowObserver { |
| 32 | public: |
| 33 | typedef std::vector<aura::Window*> WindowList; |
| 34 | |
| 35 | explicit MruWindowTracker( |
| 36 | aura::client::ActivationClient* activation_client); |
| 37 | virtual ~MruWindowTracker(); |
| 38 | |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 39 | // Returns the set of windows which can be cycled through. This method creates |
| 40 | // the vector based on the current set of windows across all valid root |
| 41 | // windows. As a result it is not necessarily the same as the set of |
| 42 | // windows being iterated over. |
| 43 | // If |top_most_at_end| the window list will return in ascending (lowest |
| 44 | // window in stacking order first) order instead of the default descending |
| 45 | // (top most window first) order. |
| 46 | static WindowList BuildWindowList(bool top_most_at_end); |
| 47 | |
| 48 | // Returns the set of windows which can be cycled through using the tracked |
| 49 | // list of most recently used windows. |
| 50 | WindowList BuildMruWindowList(); |
| 51 | |
| 52 | // Starts or stops ignoring window activations. If no longer ignoring |
| 53 | // activations the currently active window is moved to the front of the |
| 54 | // MRU window list. Used by WindowCycleList to avoid adding all cycled |
| 55 | // windows to the front of the MRU window list. |
| 56 | void SetIgnoreActivations(bool ignore); |
| 57 | |
| 58 | private: |
Torne (Richard Coles) | 68043e1 | 2013-09-26 13:24:57 +0100 | [diff] [blame] | 59 | // Updates the mru_windows_ list to insert/move |active_window| at/to the |
| 60 | // front. |
| 61 | void SetActiveWindow(aura::Window* active_window); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 62 | |
| 63 | // Overridden from aura::client::ActivationChangeObserver: |
| 64 | virtual void OnWindowActivated(aura::Window* gained_active, |
| 65 | aura::Window* lost_active) OVERRIDE; |
| 66 | |
| 67 | // Overridden from WindowObserver: |
Torne (Richard Coles) | 5d1f7b1 | 2014-02-21 12:16:55 +0000 | [diff] [blame] | 68 | virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE; |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 69 | |
| 70 | // List of windows that have been activated in containers that we cycle |
| 71 | // through, sorted by most recently used. |
| 72 | std::list<aura::Window*> mru_windows_; |
| 73 | |
| 74 | aura::client::ActivationClient* activation_client_; |
| 75 | |
| 76 | bool ignore_window_activations_; |
| 77 | |
| 78 | DISALLOW_COPY_AND_ASSIGN(MruWindowTracker); |
| 79 | }; |
| 80 | |
| 81 | } // namespace ash |
| 82 | |
| 83 | #endif // ASH_WM_MRU_WINDOW_TRACKER_H_ |