chrome/browser/ui/app_list/app_list_shower_views.cc

   1 // Copyright 2014 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 "chrome/browser/ui/app_list/app_list_shower_views.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/profiler/scoped_tracker.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "base/thread_task_runner_handle.h"
  12 #include "chrome/browser/apps/scoped_keep_alive.h"
  13 #include "chrome/browser/profiles/profile.h"
  14 #include "chrome/browser/ui/app_list/app_list_shower_delegate.h"
  15 #include "chrome/browser/ui/app_list/app_list_view_delegate.h"
  16 #include "ui/app_list/views/app_list_view.h"
  17 #include "ui/gfx/geometry/point.h"
  18 #include "ui/gfx/screen.h"
  19
  20 AppListShower::AppListShower(AppListShowerDelegate* delegate)
  21     : delegate_(delegate),
  22       profile_(NULL),
  23       app_list_(NULL),
  24       window_icon_updated_(false) {
  25 }
  26
  27 AppListShower::~AppListShower() {
  28 }
  29
  30 void AppListShower::ShowForCurrentProfile() {
  31   DCHECK(HasView());
  32   keep_alive_.reset(new ScopedKeepAlive);
  33
  34   // If the app list is already displaying |profile| just activate it (in case
  35   // we have lost focus).
  36   if (!IsAppListVisible())
  37     delegate_->MoveNearCursor(app_list_);
  38
  39   Show();
  40 }
  41
  42 gfx::NativeWindow AppListShower::GetWindow() {
  43   if (!IsAppListVisible())
  44     return NULL;
  45   return app_list_->GetWidget()->GetNativeWindow();
  46 }
  47
  48 void AppListShower::CreateViewForProfile(Profile* requested_profile) {
  49   DCHECK(requested_profile);
  50   if (HasView() && requested_profile->IsSameProfile(profile_))
  51     return;
  52
  53   profile_ = requested_profile->GetOriginalProfile();
  54   if (HasView()) {
  55     UpdateViewForNewProfile();
  56     return;
  57   }
  58   app_list_ = MakeViewForCurrentProfile();
  59
  60   // TODO(tapted): Remove ScopedTracker below once crbug.com/431326 is fixed.
  61   tracked_objects::ScopedTracker tracking_profile(
  62       FROM_HERE_WITH_EXPLICIT_FUNCTION(
  63           "431326 AppListShowerDelegate::OnViewCreated()"));
  64
  65   delegate_->OnViewCreated();
  66 }
  67
  68 void AppListShower::DismissAppList() {
  69   if (HasView()) {
  70     Hide();
  71     delegate_->OnViewDismissed();
  72     // This can be reached by pressing the dismiss accelerator. To prevent
  73     // events from being processed with a destroyed dispatcher, delay the reset
  74     // of the keep alive.
  75     ResetKeepAliveSoon();
  76   }
  77 }
  78
  79 void AppListShower::HandleViewBeingDestroyed() {
  80   app_list_ = NULL;
  81   profile_ = NULL;
  82
  83   // We may end up here as the result of the OS deleting the AppList's
  84   // widget (WidgetObserver::OnWidgetDestroyed). If this happens and there
  85   // are no browsers around then deleting the keep alive will result in
  86   // deleting the Widget again (by way of CloseAllSecondaryWidgets). When
  87   // the stack unravels we end up back in the Widget that was deleted and
  88   // crash. By delaying deletion of the keep alive we ensure the Widget has
  89   // correctly been destroyed before ending the keep alive so that
  90   // CloseAllSecondaryWidgets() won't attempt to delete the AppList's Widget
  91   // again.
  92   ResetKeepAliveSoon();
  93 }
  94
  95 bool AppListShower::IsAppListVisible() const {
  96   return app_list_ && app_list_->GetWidget()->IsVisible();
  97 }
  98
  99 void AppListShower::WarmupForProfile(Profile* profile) {
 100   DCHECK(!profile_);
 101   CreateViewForProfile(profile);
 102   app_list_->Prerender();
 103 }
 104
 105 bool AppListShower::HasView() const {
 106   return !!app_list_;
 107 }
 108
 109 app_list::AppListView* AppListShower::MakeViewForCurrentProfile() {
 110   app_list::AppListView* view;
 111   {
 112     // TODO(tapted): Remove ScopedTracker below once crbug.com/431326 is fixed.
 113     tracked_objects::ScopedTracker tracking_profile1(
 114         FROM_HERE_WITH_EXPLICIT_FUNCTION("431326 AppListView()"));
 115
 116     // The app list view manages its own lifetime.
 117     view = new app_list::AppListView(delegate_->GetViewDelegateForCreate());
 118   }
 119
 120   gfx::Point cursor = gfx::Screen::GetNativeScreen()->GetCursorScreenPoint();
 121   view->InitAsBubbleAtFixedLocation(NULL,
 122                                     0,
 123                                     cursor,
 124                                     views::BubbleBorder::FLOAT,
 125                                     false /* border_accepts_events */);
 126   return view;
 127 }
 128
 129 void AppListShower::UpdateViewForNewProfile() {
 130   app_list_->SetProfileByPath(profile_->GetPath());
 131 }
 132
 133 void AppListShower::Show() {
 134   app_list_->GetWidget()->Show();
 135   if (!window_icon_updated_) {
 136     app_list_->GetWidget()->GetTopLevelWidget()->UpdateWindowIcon();
 137     window_icon_updated_ = true;
 138   }
 139   app_list_->GetWidget()->Activate();
 140 }
 141
 142 void AppListShower::Hide() {
 143   app_list_->GetWidget()->Hide();
 144 }
 145
 146 void AppListShower::ResetKeepAliveSoon() {
 147   if (base::ThreadTaskRunnerHandle::IsSet()) {  // Not set in tests.
 148     base::ThreadTaskRunnerHandle::Get()->PostTask(
 149         FROM_HERE,
 150         base::Bind(&AppListShower::ResetKeepAlive, base::Unretained(this)));
 151     return;
 152   }
 153   ResetKeepAlive();
 154 }
 155
 156 void AppListShower::ResetKeepAlive() {
 157   keep_alive_.reset();
 158 }