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