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::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 // This can be reached by pressing the dismiss accelerator. To prevent 65 // events from being processed with a destroyed dispatcher, delay the reset 66 // of the keep alive. 67 ResetKeepAliveSoon(); 68 } 69 } 70 71 void AppListShower::HandleViewBeingDestroyed() { 72 app_list_ = NULL; 73 profile_ = NULL; 74 75 // We may end up here as the result of the OS deleting the AppList's 76 // widget (WidgetObserver::OnWidgetDestroyed). If this happens and there 77 // are no browsers around then deleting the keep alive will result in 78 // deleting the Widget again (by way of CloseAllSecondaryWidgets). When 79 // the stack unravels we end up back in the Widget that was deleted and 80 // crash. By delaying deletion of the keep alive we ensure the Widget has 81 // correctly been destroyed before ending the keep alive so that 82 // CloseAllSecondaryWidgets() won't attempt to delete the AppList's Widget 83 // again. 84 ResetKeepAliveSoon(); 85 } 86 87 bool AppListShower::IsAppListVisible() const { 88 return app_list_ && app_list_->GetWidget()->IsVisible(); 89 } 90 91 void AppListShower::WarmupForProfile(Profile* profile) { 92 DCHECK(!profile_); 93 CreateViewForProfile(profile); 94 app_list_->Prerender(); 95 } 96 97 bool AppListShower::HasView() const { 98 return !!app_list_; 99 } 100 101 app_list::AppListView* AppListShower::MakeViewForCurrentProfile() { 102 // The app list view manages its own lifetime. 103 app_list::AppListView* view = 104 new app_list::AppListView(delegate_->GetViewDelegateForCreate()); 105 gfx::Point cursor = gfx::Screen::GetNativeScreen()->GetCursorScreenPoint(); 106 view->InitAsBubbleAtFixedLocation(NULL, 107 0, 108 cursor, 109 views::BubbleBorder::FLOAT, 110 false /* border_accepts_events */); 111 return view; 112 } 113 114 void AppListShower::UpdateViewForNewProfile() { 115 app_list_->SetProfileByPath(profile_->GetPath()); 116 } 117 118 void AppListShower::Show() { 119 app_list_->GetWidget()->Show(); 120 if (!window_icon_updated_) { 121 app_list_->GetWidget()->GetTopLevelWidget()->UpdateWindowIcon(); 122 window_icon_updated_ = true; 123 } 124 app_list_->GetWidget()->Activate(); 125 } 126 127 void AppListShower::Hide() { 128 app_list_->GetWidget()->Hide(); 129 } 130 131 void AppListShower::ResetKeepAliveSoon() { 132 if (base::MessageLoop::current()) { // NULL in tests. 133 base::MessageLoop::current()->PostTask( 134 FROM_HERE, 135 base::Bind(&AppListShower::ResetKeepAlive, base::Unretained(this))); 136 return; 137 } 138 ResetKeepAlive(); 139 } 140 141 void AppListShower::ResetKeepAlive() { 142 keep_alive_.reset(); 143 } 144