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