chrome_views_delegate.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
1// Copyright (c) 2012 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/views/chrome_views_delegate.h"
6
7#include "base/command_line.h"
8#include "base/memory/scoped_ptr.h"
9#include "base/prefs/pref_service.h"
10#include "base/string_util.h"
11#include "base/utf_string_conversions.h"
12#include "chrome/browser/browser_process.h"
13#include "chrome/browser/prefs/scoped_user_pref_update.h"
14#include "chrome/browser/profiles/profile_manager.h"
15#include "chrome/browser/ui/views/accessibility/accessibility_event_router_views.h"
16#include "chrome/common/pref_names.h"
17#include "ui/base/ui_base_switches.h"
18#include "ui/gfx/rect.h"
19#include "ui/gfx/screen.h"
20#include "ui/views/widget/native_widget.h"
21#include "ui/views/widget/widget.h"
22
23#if defined(OS_WIN)
24#include <dwmapi.h>
25#include "base/win/windows_version.h"
26#include "chrome/browser/app_icon_win.h"
27#endif
28
29#if defined(USE_AURA)
30#include "ui/aura/root_window.h"
31#endif
32
33#if defined(USE_AURA) && !defined(OS_CHROMEOS)
34#include "chrome/browser/ui/host_desktop.h"
35#include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
36#include "ui/views/widget/native_widget_aura.h"
37#endif
38
39#if defined(USE_ASH)
40#include "ash/shell.h"
41#include "chrome/browser/ui/ash/ash_init.h"
42#include "chrome/browser/ui/ash/ash_util.h"
43#endif
44
45namespace {
46
47// If the given window has a profile associated with it, use that profile's
48// preference service. Otherwise, store and retrieve the data from Local State.
49// This function may return NULL if the necessary pref service has not yet
50// been initialized.
51// TODO(mirandac): This function will also separate windows by profile in a
52// multi-profile environment.
53PrefService* GetPrefsForWindow(const views::Widget* window) {
54  Profile* profile = reinterpret_cast<Profile*>(
55      window->GetNativeWindowProperty(Profile::kProfileKey));
56  if (!profile) {
57    // Use local state for windows that have no explicit profile.
58    return g_browser_process->local_state();
59  }
60  return profile->GetPrefs();
61}
62
63}  // namespace
64
65///////////////////////////////////////////////////////////////////////////////
66// ChromeViewsDelegate, views::ViewsDelegate implementation:
67
68void ChromeViewsDelegate::SaveWindowPlacement(const views::Widget* window,
69                                              const std::string& window_name,
70                                              const gfx::Rect& bounds,
71                                              ui::WindowShowState show_state) {
72  PrefService* prefs = GetPrefsForWindow(window);
73  if (!prefs)
74    return;
75
76  DCHECK(prefs->FindPreference(window_name.c_str()));
77  DictionaryPrefUpdate update(prefs, window_name.c_str());
78  DictionaryValue* window_preferences = update.Get();
79  window_preferences->SetInteger("left", bounds.x());
80  window_preferences->SetInteger("top", bounds.y());
81  window_preferences->SetInteger("right", bounds.right());
82  window_preferences->SetInteger("bottom", bounds.bottom());
83  window_preferences->SetBoolean("maximized",
84                                 show_state == ui::SHOW_STATE_MAXIMIZED);
85  gfx::Rect work_area(gfx::Screen::GetScreenFor(window->GetNativeView())->
86      GetDisplayMatching(bounds).work_area());
87  window_preferences->SetInteger("work_area_left", work_area.x());
88  window_preferences->SetInteger("work_area_top", work_area.y());
89  window_preferences->SetInteger("work_area_right", work_area.right());
90  window_preferences->SetInteger("work_area_bottom", work_area.bottom());
91}
92
93bool ChromeViewsDelegate::GetSavedWindowPlacement(
94    const std::string& window_name,
95    gfx::Rect* bounds,
96    ui::WindowShowState* show_state) const {
97  PrefService* prefs = g_browser_process->local_state();
98  if (!prefs)
99    return false;
100
101  DCHECK(prefs->FindPreference(window_name.c_str()));
102  const DictionaryValue* dictionary = prefs->GetDictionary(window_name.c_str());
103  int left, top, right, bottom;
104  if (!dictionary || !dictionary->GetInteger("left", &left) ||
105      !dictionary->GetInteger("top", &top) ||
106      !dictionary->GetInteger("right", &right) ||
107      !dictionary->GetInteger("bottom", &bottom))
108    return false;
109
110  bounds->SetRect(left, top, right - left, bottom - top);
111
112  bool maximized = false;
113  if (dictionary)
114    dictionary->GetBoolean("maximized", &maximized);
115  *show_state = maximized ? ui::SHOW_STATE_MAXIMIZED : ui::SHOW_STATE_NORMAL;
116
117  return true;
118}
119
120void ChromeViewsDelegate::NotifyAccessibilityEvent(
121    views::View* view, ui::AccessibilityTypes::Event event_type) {
122  AccessibilityEventRouterViews::GetInstance()->HandleAccessibilityEvent(
123      view, event_type);
124}
125
126void ChromeViewsDelegate::NotifyMenuItemFocused(const string16& menu_name,
127                                                const string16& menu_item_name,
128                                                int item_index,
129                                                int item_count,
130                                                bool has_submenu) {
131  AccessibilityEventRouterViews::GetInstance()->HandleMenuItemFocused(
132      menu_name, menu_item_name, item_index, item_count, has_submenu);
133}
134
135#if defined(OS_WIN)
136HICON ChromeViewsDelegate::GetDefaultWindowIcon() const {
137  return GetAppIcon();
138}
139#endif
140
141views::NonClientFrameView* ChromeViewsDelegate::CreateDefaultNonClientFrameView(
142    views::Widget* widget) {
143#if defined(USE_ASH)
144  if (chrome::IsNativeViewInAsh(widget->GetNativeView()))
145    return ash::Shell::GetInstance()->CreateDefaultNonClientFrameView(widget);
146#endif
147  return NULL;
148}
149
150bool ChromeViewsDelegate::UseTransparentWindows() const {
151#if defined(USE_ASH)
152  // TODO(scottmg): http://crbug.com/133312. This needs context to determine
153  // if it's desktop or ash.
154#if defined(OS_CHROMEOS)
155  return true;
156#else
157  NOTIMPLEMENTED();
158  return false;
159#endif
160#else
161  return false;
162#endif
163}
164
165void ChromeViewsDelegate::AddRef() {
166  g_browser_process->AddRefModule();
167}
168
169void ChromeViewsDelegate::ReleaseRef() {
170  g_browser_process->ReleaseModule();
171}
172
173content::WebContents* ChromeViewsDelegate::CreateWebContents(
174    content::BrowserContext* browser_context,
175    content::SiteInstance* site_instance) {
176  return NULL;
177}
178
179void ChromeViewsDelegate::OnBeforeWidgetInit(
180    views::Widget::InitParams* params,
181    views::internal::NativeWidgetDelegate* delegate) {
182  // If we already have a native_widget, we don't have to try to come
183  // up with one.
184  if (params->native_widget)
185    return;
186
187#if defined(USE_AURA) && !defined(OS_CHROMEOS)
188  bool use_non_toplevel_window =
189      params->parent && params->type != views::Widget::InitParams::TYPE_MENU;
190#if defined(OS_WIN)
191  // If we're on Vista+ with composition enabled, then we can use toplevel
192  // windows for most things (they get blended via WS_EX_COMPOSITED, which
193  // allows for animation effects, but also exceeding the bounds of the parent
194  // window).
195  if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
196    BOOL composition_enabled = FALSE;
197    HRESULT hr = DwmIsCompositionEnabled(&composition_enabled);
198    if (CommandLine::ForCurrentProcess()->HasSwitch(
199            switches::kDisableDwmComposition))
200      composition_enabled = FALSE;
201    if (SUCCEEDED(hr) && composition_enabled) {
202      if (chrome::GetActiveDesktop() != chrome::HOST_DESKTOP_TYPE_ASH &&
203          params->parent &&
204          params->type != views::Widget::InitParams::TYPE_CONTROL &&
205          params->type != views::Widget::InitParams::TYPE_WINDOW) {
206        // When we set this to false, we get a DesktopNativeWidgetAura from the
207        // default case (not handled in this function).
208        use_non_toplevel_window = false;
209      }
210    }
211  }
212#endif  // OS_WIN
213#endif  // USE_AURA
214
215#if defined(OS_CHROMEOS)
216  // When we are doing straight chromeos builds, we still need to handle the
217  // toplevel window case.
218  // There may be a few remaining widgets in Chrome OS that are not top level,
219  // but have neither a context nor a parent. Provide a fallback context so
220  // users don't crash. Developers will hit the DCHECK and should provide a
221  // context.
222  DCHECK(params->parent || params->context || params->top_level)
223      << "Please provide a parent or context for this widget.";
224  if (!params->parent && !params->context)
225    params->context = ash::Shell::GetPrimaryRootWindow();
226#elif defined(USE_AURA)
227  // While the majority of the time, context wasn't plumbed through due to the
228  // existence of a global StackingClient, if this window is a toplevel, it's
229  // possible that there is no contextual state that we can use.
230  if (params->parent == NULL && params->context == NULL && params->top_level) {
231    // We need to make a decision about where to place this window based on the
232    // desktop type.
233    switch (chrome::GetActiveDesktop()) {
234      case chrome::HOST_DESKTOP_TYPE_NATIVE:
235        // If we're native, we should give this window its own toplevel desktop
236        // widget.
237        params->native_widget = new views::DesktopNativeWidgetAura(delegate);
238        break;
239#if defined(USE_ASH)
240      case chrome::HOST_DESKTOP_TYPE_ASH:
241        // If we're in ash, give this window the context of the main monitor.
242        params->context = ash::Shell::GetPrimaryRootWindow();
243        break;
244#endif
245      default:
246        NOTREACHED();
247    }
248  } else if (use_non_toplevel_window) {
249    params->native_widget = new views::NativeWidgetAura(delegate);
250  } else if (params->type != views::Widget::InitParams::TYPE_TOOLTIP) {
251    // TODO(erg): Once we've threaded context to everywhere that needs it, we
252    // should remove this check here.
253    gfx::NativeView to_check =
254        params->context ? params->context : params->parent;
255    if (chrome::GetHostDesktopTypeForNativeView(to_check) ==
256        chrome::HOST_DESKTOP_TYPE_NATIVE) {
257      params->native_widget = new views::DesktopNativeWidgetAura(delegate);
258    }
259  }
260#endif
261}
262