chrome/browser/ui/app_list/app_list_shower.cc

   1 // Copyright 2013 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 "base/bind.h"
   6 #include "base/message_loop/message_loop.h"
   7 #include "chrome/browser/ui/app_list/app_list_shower.h"
   8
   9 AppListShower::AppListShower(scoped_ptr<AppListFactory> factory,
  10                              scoped_ptr<KeepAliveService> keep_alive,
  11                              AppListService* service)
  12     : factory_(factory.Pass()),
  13       keep_alive_service_(keep_alive.Pass()),
  14       service_(service),
  15       profile_(NULL),
  16       can_close_app_list_(true) {
  17 }
  18
  19 AppListShower::~AppListShower() {
  20 }
  21
  22 void AppListShower::ShowAndReacquireFocus(Profile* requested_profile) {
  23   ShowForProfile(requested_profile);
  24   app_list_->ReactivateOnNextFocusLoss();
  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     app_list_->Show();
  32     return;
  33   }
  34
  35   if (!app_list_) {
  36     CreateViewForProfile(requested_profile);
  37   } else if (requested_profile != profile_) {
  38     profile_ = requested_profile;
  39     app_list_->SetProfile(requested_profile);
  40   }
  41
  42   keep_alive_service_->EnsureKeepAlive();
  43   if (!IsAppListVisible())
  44     app_list_->MoveNearCursor();
  45   app_list_->Show();
  46 }
  47
  48 gfx::NativeWindow AppListShower::GetWindow() {
  49   if (!IsAppListVisible())
  50     return NULL;
  51   return app_list_->GetWindow();
  52 }
  53
  54 void AppListShower::CreateViewForProfile(Profile* requested_profile) {
  55   profile_ = requested_profile;
  56   app_list_.reset(factory_->CreateAppList(
  57       profile_,
  58       service_,
  59       base::Bind(&AppListShower::DismissAppList, base::Unretained(this))));
  60 }
  61
  62 void AppListShower::DismissAppList() {
  63   if (app_list_ && can_close_app_list_) {
  64     app_list_->Hide();
  65     keep_alive_service_->FreeKeepAlive();
  66   }
  67 }
  68
  69 void AppListShower::CloseAppList() {
  70   app_list_.reset();
  71   profile_ = NULL;
  72   can_close_app_list_ = true;
  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   if (base::MessageLoop::current()) {  // NULL in tests.
  84     base::MessageLoop::current()->PostTask(FROM_HERE,
  85         base::Bind(&KeepAliveService::FreeKeepAlive,
  86                    base::Unretained(keep_alive_service_.get())));
  87     return;
  88   }
  89   keep_alive_service_->FreeKeepAlive();
  90 }
  91
  92 bool AppListShower::IsAppListVisible() const {
  93   return app_list_ && app_list_->IsVisible();
  94 }
  95
  96 void AppListShower::WarmupForProfile(Profile* profile) {
  97   DCHECK(!profile_);
  98   CreateViewForProfile(profile);
  99   app_list_->Prerender();
 100 }
 101
 102 bool AppListShower::HasView() const {
 103   return !!app_list_;
 104 }