chrome/browser/ui/views/frame/immersive_mode_controller.h

   1 // Copyright 2012 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 CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/observer_list.h"
  10
  11 #if defined(USE_ASH)
  12 #include "ash/wm/immersive_revealed_lock.h"
  13 #endif
  14
  15 class BrowserView;
  16
  17 namespace gfx {
  18 class Rect;
  19 class Size;
  20 }
  21
  22 #if defined(USE_ASH)
  23 typedef ash::ImmersiveRevealedLock ImmersiveRevealedLock;
  24 #else
  25 // Do nothing version of ash::ImmersiveRevealedLock.
  26 class ImmersiveRevealedLock {
  27  public:
  28   ImmersiveRevealedLock() {}
  29   ~ImmersiveRevealedLock() {}
  30 };
  31 #endif
  32
  33 // Controller for an "immersive mode" similar to MacOS presentation mode where
  34 // the top-of-window views are hidden until the mouse hits the top of the
  35 // screen. The tab strip is optionally painted with miniature "tab indicator"
  36 // rectangles.
  37 // Currently, immersive mode is only available for Chrome OS.
  38 class ImmersiveModeController {
  39  public:
  40   enum AnimateReveal {
  41     ANIMATE_REVEAL_YES,
  42     ANIMATE_REVEAL_NO
  43   };
  44
  45   class Observer {
  46    public:
  47     // Called when a reveal of the top-of-window views has been initiated.
  48     virtual void OnImmersiveRevealStarted() {}
  49
  50     // Called when the immersive mode controller has been destroyed.
  51     virtual void OnImmersiveModeControllerDestroyed() {}
  52
  53    protected:
  54     virtual ~Observer() {}
  55   };
  56
  57   ImmersiveModeController();
  58   virtual ~ImmersiveModeController();
  59
  60   // Must initialize after browser view has a Widget and native window.
  61   virtual void Init(BrowserView* browser_view) = 0;
  62
  63   // Enables or disables immersive mode.
  64   virtual void SetEnabled(bool enabled) = 0;
  65   virtual bool IsEnabled() const = 0;
  66
  67   // True if the miniature "tab indicators" should be hidden in the main browser
  68   // view when immersive mode is enabled.
  69   virtual bool ShouldHideTabIndicators() const = 0;
  70
  71   // True when the top views are hidden due to immersive mode.
  72   virtual bool ShouldHideTopViews() const = 0;
  73
  74   // True when the top views are fully or partially visible.
  75   virtual bool IsRevealed() const = 0;
  76
  77   // Returns the top container's vertical offset relative to its parent. When
  78   // revealing or closing the top-of-window views, part of the top container is
  79   // offscreen.
  80   // This method takes in the top container's size because it is called as part
  81   // of computing the new bounds for the top container in
  82   // BrowserViewLayout::UpdateTopContainerBounds().
  83   virtual int GetTopContainerVerticalOffset(
  84       const gfx::Size& top_container_size) const = 0;
  85
  86   // Returns a lock which will keep the top-of-window views revealed for its
  87   // lifetime. Several locks can be obtained. When all of the locks are
  88   // destroyed, if immersive mode is enabled and there is nothing else keeping
  89   // the top-of-window views revealed, the top-of-window views will be closed.
  90   // This method always returns a valid lock regardless of whether immersive
  91   // mode is enabled. The lock's lifetime can span immersive mode being
  92   // enabled / disabled.
  93   // If acquiring the lock causes a reveal, the top-of-window views will animate
  94   // according to |animate_reveal|.
  95   // The caller takes ownership of the returned lock.
  96   virtual ImmersiveRevealedLock* GetRevealedLock(
  97       AnimateReveal animate_reveal) WARN_UNUSED_RESULT = 0;
  98
  99   // Called by the find bar to indicate that its visible bounds have changed.
 100   // |new_visible_bounds_in_screen| should be empty if the find bar is not
 101   // visible.
 102   virtual void OnFindBarVisibleBoundsChanged(
 103       const gfx::Rect& new_visible_bounds_in_screen) = 0;
 104
 105   // Disables animations and moves the mouse so that it is not over the
 106   // top-of-window views for the sake of testing. Must be called before
 107   // enabling immersive fullscreen.
 108   virtual void SetupForTest() = 0;
 109
 110   virtual void AddObserver(Observer* observer);
 111   virtual void RemoveObserver(Observer* observer);
 112
 113  protected:
 114   ObserverList<Observer> observers_;
 115
 116  private:
 117   DISALLOW_COPY_AND_ASSIGN(ImmersiveModeController);
 118 };
 119
 120 namespace chrome {
 121
 122 // Implemented in immersive_mode_controller_factory.cc.
 123 ImmersiveModeController* CreateImmersiveModeController();
 124
 125 }  // namespace chrome
 126
 127 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_H_