app_list_shower_views.cc revision 010d83a9304c5a91596085d917d248abff47903a 
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
17AppListShower::AppListShower(AppListShowerDelegate* delegate)
18    : delegate_(delegate),
19      profile_(NULL),
20      app_list_(NULL),
21      window_icon_updated_(false) {
22}
23
24AppListShower::~AppListShower() {
25}
26
27void 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
48gfx::NativeWindow AppListShower::GetWindow() {
49  if (!IsAppListVisible())
50    return NULL;
51  return app_list_->GetWidget()->GetNativeWindow();
52}
53
54void AppListShower::CreateViewForProfile(Profile* requested_profile) {
55  profile_ = requested_profile;
56  app_list_ = MakeViewForCurrentProfile();
57  delegate_->OnViewCreated();
58}
59
60void AppListShower::DismissAppList() {
61  if (HasView()) {
62    Hide();
63    delegate_->OnViewDismissed();
64    keep_alive_.reset();
65  }
66}
67
68void 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
90bool AppListShower::IsAppListVisible() const {
91  return app_list_ && app_list_->GetWidget()->IsVisible();
92}
93
94void AppListShower::WarmupForProfile(Profile* profile) {
95  DCHECK(!profile_);
96  CreateViewForProfile(profile);
97  app_list_->Prerender();
98}
99
100bool AppListShower::HasView() const {
101  return !!app_list_;
102}
103
104app_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
119void AppListShower::UpdateViewForNewProfile() {
120  app_list_->SetProfileByPath(profile_->GetPath());
121}
122
123void 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
132void AppListShower::Hide() {
133  app_list_->GetWidget()->Hide();
134}
135
136void AppListShower::ResetKeepAlive() {
137  keep_alive_.reset();
138}
139