src/ash/wm/overview/window_selector_controller.cc

   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 #include "ash/wm/overview/window_selector_controller.h"
   6
   7 #include "ash/metrics/user_metrics_recorder.h"
   8 #include "ash/root_window_controller.h"
   9 #include "ash/session_state_delegate.h"
  10 #include "ash/shell.h"
  11 #include "ash/wm/mru_window_tracker.h"
  12 #include "ash/wm/overview/window_selector.h"
  13 #include "ash/wm/window_state.h"
  14 #include "ash/wm/window_util.h"
  15 #include "base/metrics/histogram.h"
  16 #include "ui/aura/window.h"
  17
  18 namespace ash {
  19
  20 WindowSelectorController::WindowSelectorController() {
  21 }
  22
  23 WindowSelectorController::~WindowSelectorController() {
  24 }
  25
  26 // static
  27 bool WindowSelectorController::CanSelect() {
  28   // Don't allow a window overview if the screen is locked or a modal dialog is
  29   // open.
  30   return !Shell::GetInstance()->session_state_delegate()->IsScreenLocked() &&
  31          !Shell::GetInstance()->IsSystemModalWindowOpen();
  32 }
  33
  34 void WindowSelectorController::ToggleOverview() {
  35   if (IsSelecting()) {
  36     OnSelectionCanceled();
  37   } else {
  38     std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
  39         mru_window_tracker()->BuildMruWindowList();
  40     // Don't enter overview mode with no windows.
  41     if (windows.empty())
  42       return;
  43
  44     window_selector_.reset(
  45         new WindowSelector(windows, WindowSelector::OVERVIEW, this));
  46     OnSelectionStarted();
  47   }
  48 }
  49
  50 void WindowSelectorController::HandleCycleWindow(
  51     WindowSelector::Direction direction) {
  52   if (!CanSelect())
  53     return;
  54
  55   if (!IsSelecting()) {
  56     std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
  57         mru_window_tracker()->BuildMruWindowList();
  58     // Don't cycle with no windows.
  59     if (windows.empty())
  60       return;
  61
  62     window_selector_.reset(
  63         new WindowSelector(windows, WindowSelector::CYCLE, this));
  64     OnSelectionStarted();
  65   }
  66   window_selector_->Step(direction);
  67 }
  68
  69 bool WindowSelectorController::IsSelecting() {
  70   return window_selector_.get() != NULL;
  71 }
  72
  73 void WindowSelectorController::OnWindowSelected(aura::Window* window) {
  74   wm::ActivateWindow(window);
  75   window_selector_.reset();
  76   last_selection_time_ = base::Time::Now();
  77   Shell::GetInstance()->mru_window_tracker()->SetIgnoreActivations(false);
  78 }
  79
  80 void WindowSelectorController::OnSelectionCanceled() {
  81   window_selector_.reset();
  82   last_selection_time_ = base::Time::Now();
  83   Shell::GetInstance()->mru_window_tracker()->SetIgnoreActivations(false);
  84 }
  85
  86 void WindowSelectorController::OnSelectionStarted() {
  87   Shell::GetInstance()->mru_window_tracker()->SetIgnoreActivations(true);
  88   Shell* shell = Shell::GetInstance();
  89   shell->metrics()->RecordUserMetricsAction(UMA_WINDOW_SELECTION);
  90   if (!last_selection_time_.is_null()) {
  91     UMA_HISTOGRAM_LONG_TIMES(
  92         "Ash.WindowSelector.TimeBetweenUse",
  93         base::Time::Now() - last_selection_time_);
  94   }
  95 }
  96
  97 }  // namespace ash