chrome/browser/ui/app_list/app_list_shower.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 "base/bind.h"
   6 #include "base/message_loop/message_loop.h"
   7 #include "chrome/browser/ui/app_list/app_list_shower.h"
   8 #include "chrome/browser/ui/app_list/scoped_keep_alive.h"
   9
  10 AppListShower::AppListShower(scoped_ptr<AppListFactory> factory,
  11                              AppListService* service)
  12     : factory_(factory.Pass()),
  13       service_(service),
  14       profile_(NULL),
  15       can_close_app_list_(true) {
  16 }
  17
  18 AppListShower::~AppListShower() {
  19 }
  20
  21 void AppListShower::ShowForProfile(Profile* requested_profile) {
  22   // If the app list is already displaying |profile| just activate it (in case
  23   // we have lost focus).
  24   if (IsAppListVisible() && (requested_profile == profile_)) {
  25     app_list_->Show();
  26     return;
  27   }
  28
  29   if (!app_list_) {
  30     CreateViewForProfile(requested_profile);
  31   } else if (requested_profile != profile_) {
  32     profile_ = requested_profile;
  33     app_list_->SetProfile(requested_profile);
  34   }
  35
  36   keep_alive_.reset(new ScopedKeepAlive);
  37   if (!IsAppListVisible())
  38     app_list_->MoveNearCursor();
  39   app_list_->Show();
  40 }
  41
  42 gfx::NativeWindow AppListShower::GetWindow() {
  43   if (!IsAppListVisible())
  44     return NULL;
  45   return app_list_->GetWindow();
  46 }
  47
  48 void AppListShower::CreateViewForProfile(Profile* requested_profile) {
  49   profile_ = requested_profile;
  50   app_list_.reset(factory_->CreateAppList(
  51       profile_,
  52       service_,
  53       base::Bind(&AppListShower::DismissAppList, base::Unretained(this))));
  54 }
  55
  56 void AppListShower::DismissAppList() {
  57   if (app_list_ && can_close_app_list_) {
  58     app_list_->Hide();
  59     keep_alive_.reset();
  60   }
  61 }
  62
  63 void AppListShower::HandleViewBeingDestroyed() {
  64   app_list_.reset();
  65   profile_ = NULL;
  66   can_close_app_list_ = true;
  67
  68   // We may end up here as the result of the OS deleting the AppList's
  69   // widget (WidgetObserver::OnWidgetDestroyed). If this happens and there
  70   // are no browsers around then deleting the keep alive will result in
  71   // deleting the Widget again (by way of CloseAllSecondaryWidgets). When
  72   // the stack unravels we end up back in the Widget that was deleted and
  73   // crash. By delaying deletion of the keep alive we ensure the Widget has
  74   // correctly been destroyed before ending the keep alive so that
  75   // CloseAllSecondaryWidgets() won't attempt to delete the AppList's Widget
  76   // again.
  77   if (base::MessageLoop::current()) {  // NULL in tests.
  78     base::MessageLoop::current()->PostTask(
  79         FROM_HERE,
  80         base::Bind(&AppListShower::ResetKeepAlive, base::Unretained(this)));
  81     return;
  82   }
  83   keep_alive_.reset();
  84 }
  85
  86 bool AppListShower::IsAppListVisible() const {
  87   return app_list_ && app_list_->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 void AppListShower::ResetKeepAlive() {
 101   keep_alive_.reset();
 102 }