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::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 }