chrome/browser/extensions/api/tabs/windows_event_router.cc - chromium/src - Git at Google

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "chrome/browser/extensions/api/tabs/windows_event_router.h"

 #include <utility>

 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/tabs/app_base_window.h"
 #include "chrome/browser/extensions/api/tabs/app_window_controller.h"
 #include "chrome/browser/extensions/api/tabs/tabs_constants.h"
 #include "chrome/browser/extensions/api/tabs/windows_util.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/window_controller.h"
 #include "chrome/browser/extensions/window_controller_list.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/windows.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/browser/app_window/app_window.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/common/constants.h"

 using content::BrowserContext;

 namespace extensions {

 namespace keys = extensions::tabs_constants;
 namespace windows = extensions::api::windows;

 namespace {

 bool ControllerVisibleToListener(WindowController* window_controller,
                                  const Extension* extension,
                                  const base::DictionaryValue* listener_filter) {
   if (!window_controller)
     return false;

   // If there is no filter the visibility is based on the extension.
   const base::ListValue* filter_value = nullptr;
   if (!listener_filter ||
       !listener_filter->GetList(keys::kWindowTypesKey, &filter_value))
     return window_controller->IsVisibleToExtension(extension);

   // Otherwise it's based on the type filter.
   WindowController::TypeFilter filter =
       WindowController::GetFilterFromWindowTypesValues(filter_value);
   return window_controller->MatchesFilter(filter);
 }

 bool WillDispatchWindowEvent(WindowController* window_controller,
                              BrowserContext* context,
                              const Extension* extension,
                              Event* event,
                              const base::DictionaryValue* listener_filter) {
   bool has_filter =
       listener_filter && listener_filter->HasKey(keys::kWindowTypesKey);
   // Cleanup previous values.
   event->filter_info = EventFilteringInfo();
   // Only set the window type if the listener has set a filter.
   // Otherwise we set the window visibility relative to the extension.
   if (has_filter)
     event->filter_info.SetWindowType(window_controller->GetWindowTypeText());
   else
     event->filter_info.SetWindowExposedByDefault(
         window_controller->IsVisibleToExtension(extension));
   return true;
 }

 bool WillDispatchWindowFocusedEvent(
     WindowController* window_controller,
     BrowserContext* context,
     const Extension* extension,
     Event* event,
     const base::DictionaryValue* listener_filter) {
   int window_id = extension_misc::kUnknownWindowId;
   Profile* new_active_context = nullptr;
   bool has_filter =
       listener_filter && listener_filter->HasKey(keys::kWindowTypesKey);

   // We might not have a window controller if the focus moves away
   // from chromium's windows.
   if (window_controller) {
     window_id = window_controller->GetWindowId();
     new_active_context = window_controller->profile();
   }

   // Cleanup previous values.
   event->filter_info = EventFilteringInfo();
   // Only set the window type if the listener has set a filter,
   // otherwise set the visibility to true (if the window is not
   // supposed to be visible by the extension, we will clear out the
   // window id later).
   if (has_filter)
     event->filter_info.SetWindowType(
         window_controller ? window_controller->GetWindowTypeText()
                           : keys::kWindowTypeValueNormal);
   else
     event->filter_info.SetWindowExposedByDefault(true);

   // When switching between windows in the default and incognito profiles,
   // dispatch WINDOW_ID_NONE to extensions whose profile lost focus that
   // can't see the new focused window across the incognito boundary.
   // See crbug.com/46610.
   bool cant_cross_incognito = new_active_context &&
                               new_active_context != context &&
                               !util::CanCrossIncognito(extension, context);
   // If the window is not visible by the listener, we also need to
   // clear out the window id from the event.
   bool visible_to_listener = ControllerVisibleToListener(
       window_controller, extension, listener_filter);

   if (cant_cross_incognito || !visible_to_listener) {
     event->event_args->Clear();
     event->event_args->AppendInteger(extension_misc::kUnknownWindowId);
   } else {
     event->event_args->Clear();
     event->event_args->AppendInteger(window_id);
   }
   return true;
 }

 }  // namespace

 WindowsEventRouter::WindowsEventRouter(Profile* profile)
     : profile_(profile),
       focused_profile_(nullptr),
       focused_window_id_(extension_misc::kUnknownWindowId),
       observed_app_registry_(this),
       observed_controller_list_(this) {
   DCHECK(!profile->IsOffTheRecord());

   observed_app_registry_.Add(AppWindowRegistry::Get(profile_));
   observed_controller_list_.Add(WindowControllerList::GetInstance());
   // Needed for when no suitable window can be passed to an extension as the
   // currently focused window. On Mac (even in a toolkit-views build) always
   // rely on the notification sent by AppControllerMac after AppKit sends
   // NSWindowDidBecomeKeyNotification and there is no [NSApp keyWindo7w]. This
   // allows windows not created by toolkit-views to be tracked.
   // TODO(tapted): Remove the ifdefs (and NOTIFICATION_NO_KEY_WINDOW) when
   // Chrome on Mac only makes windows with toolkit-views.
 #if defined(OS_MACOSX)
   registrar_.Add(this, chrome::NOTIFICATION_NO_KEY_WINDOW,
                  content::NotificationService::AllSources());
 #elif defined(TOOLKIT_VIEWS)
   views::WidgetFocusManager::GetInstance()->AddFocusChangeListener(this);
 #else
 #error Unsupported
 #endif

   AppWindowRegistry* registry = AppWindowRegistry::Get(profile_);
   for (AppWindow* app_window : registry->app_windows())
     AddAppWindow(app_window);
 }

 WindowsEventRouter::~WindowsEventRouter() {
 #if !defined(OS_MACOSX)
   views::WidgetFocusManager::GetInstance()->RemoveFocusChangeListener(this);
 #endif
 }

 void WindowsEventRouter::OnAppWindowAdded(extensions::AppWindow* app_window) {
   if (!profile_->IsSameProfile(
           Profile::FromBrowserContext(app_window->browser_context())))
     return;
   AddAppWindow(app_window);
 }

 void WindowsEventRouter::OnAppWindowRemoved(extensions::AppWindow* app_window) {
   if (!profile_->IsSameProfile(
           Profile::FromBrowserContext(app_window->browser_context())))
     return;

   app_windows_.erase(app_window->session_id().id());
 }

 void WindowsEventRouter::OnAppWindowActivated(
     extensions::AppWindow* app_window) {
   AppWindowMap::const_iterator iter =
       app_windows_.find(app_window->session_id().id());
   OnActiveWindowChanged(iter != app_windows_.end() ? iter->second.get()
                                                    : nullptr);
 }

 void WindowsEventRouter::OnWindowControllerAdded(
     WindowController* window_controller) {
   if (!HasEventListener(windows::OnCreated::kEventName))
     return;
   if (!profile_->IsSameProfile(window_controller->profile()))
     return;

   std::unique_ptr<base::ListValue> args(new base::ListValue());
   args->Append(window_controller->CreateWindowValue());
   DispatchEvent(events::WINDOWS_ON_CREATED, windows::OnCreated::kEventName,
                 window_controller, std::move(args));
 }

 void WindowsEventRouter::OnWindowControllerRemoved(
     WindowController* window_controller) {
   if (!HasEventListener(windows::OnRemoved::kEventName))
     return;
   if (!profile_->IsSameProfile(window_controller->profile()))
     return;

   int window_id = window_controller->GetWindowId();
   std::unique_ptr<base::ListValue> args(new base::ListValue());
   args->AppendInteger(window_id);
   DispatchEvent(events::WINDOWS_ON_REMOVED, windows::OnRemoved::kEventName,
                 window_controller, std::move(args));
 }

 #if !defined(OS_MACOSX)
 void WindowsEventRouter::OnNativeFocusChanged(gfx::NativeView focused_now) {
   if (!focused_now)
     OnActiveWindowChanged(nullptr);
 }
 #endif

 void WindowsEventRouter::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
 #if defined(OS_MACOSX)
   if (chrome::NOTIFICATION_NO_KEY_WINDOW == type) {
     OnActiveWindowChanged(nullptr);
     return;
   }
 #endif
 }

 void WindowsEventRouter::OnActiveWindowChanged(
     WindowController* window_controller) {
   Profile* window_profile = nullptr;
   int window_id = extension_misc::kUnknownWindowId;
   if (window_controller &&
       profile_->IsSameProfile(window_controller->profile())) {
     window_profile = window_controller->profile();
     window_id = window_controller->GetWindowId();
   }

   if (focused_window_id_ == window_id)
     return;

   // window_profile is either the default profile for the active window, its
   // incognito profile, or nullptr if the previous profile is losing focus.
   focused_profile_ = window_profile;
   focused_window_id_ = window_id;

   if (!HasEventListener(windows::OnFocusChanged::kEventName))
     return;

   std::unique_ptr<Event> event(new Event(
       events::WINDOWS_ON_FOCUS_CHANGED, windows::OnFocusChanged::kEventName,
       base::WrapUnique(new base::ListValue())));
   event->will_dispatch_callback =
       base::Bind(&WillDispatchWindowFocusedEvent, window_controller);
   EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
 }

 void WindowsEventRouter::DispatchEvent(events::HistogramValue histogram_value,
                                        const std::string& event_name,
                                        WindowController* window_controller,
                                        std::unique_ptr<base::ListValue> args) {
   std::unique_ptr<Event> event(
       new Event(histogram_value, event_name, std::move(args)));
   event->restrict_to_browser_context = window_controller->profile();
   event->will_dispatch_callback =
       base::Bind(&WillDispatchWindowEvent, window_controller);
   EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
 }

 bool WindowsEventRouter::HasEventListener(const std::string& event_name) {
   return EventRouter::Get(profile_)->HasEventListener(event_name);
 }

 void WindowsEventRouter::AddAppWindow(extensions::AppWindow* app_window) {
   std::unique_ptr<AppWindowController> controller(new AppWindowController(
       app_window, base::WrapUnique(new AppBaseWindow(app_window)), profile_));
   app_windows_[app_window->session_id().id()] = std::move(controller);
 }

 }  // namespace extensions
	// Copyright (c) 2012 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "chrome/browser/extensions/api/tabs/windows_event_router.h"

	#include <utility>

	#include "base/memory/ptr_util.h"
	#include "base/values.h"
	#include "build/build_config.h"
	#include "chrome/browser/chrome_notification_types.h"
	#include "chrome/browser/extensions/api/tabs/app_base_window.h"
	#include "chrome/browser/extensions/api/tabs/app_window_controller.h"
	#include "chrome/browser/extensions/api/tabs/tabs_constants.h"
	#include "chrome/browser/extensions/api/tabs/windows_util.h"
	#include "chrome/browser/extensions/extension_service.h"
	#include "chrome/browser/extensions/extension_util.h"
	#include "chrome/browser/extensions/window_controller.h"
	#include "chrome/browser/extensions/window_controller_list.h"
	#include "chrome/browser/profiles/profile.h"
	#include "chrome/common/extensions/api/windows.h"
	#include "chrome/common/extensions/extension_constants.h"
	#include "content/public/browser/notification_service.h"
	#include "extensions/browser/app_window/app_window.h"
	#include "extensions/browser/event_router.h"
	#include "extensions/common/constants.h"

	using content::BrowserContext;

	namespace extensions {

	namespace keys = extensions::tabs_constants;
	namespace windows = extensions::api::windows;

	namespace {

	bool ControllerVisibleToListener(WindowController* window_controller,
	const Extension* extension,
	const base::DictionaryValue* listener_filter) {
	if (!window_controller)
	return false;

	// If there is no filter the visibility is based on the extension.
	const base::ListValue* filter_value = nullptr;
	if (!listener_filter \|\|
	!listener_filter->GetList(keys::kWindowTypesKey, &filter_value))
	return window_controller->IsVisibleToExtension(extension);

	// Otherwise it's based on the type filter.
	WindowController::TypeFilter filter =
	WindowController::GetFilterFromWindowTypesValues(filter_value);
	return window_controller->MatchesFilter(filter);
	}

	bool WillDispatchWindowEvent(WindowController* window_controller,
	BrowserContext* context,
	const Extension* extension,
	Event* event,
	const base::DictionaryValue* listener_filter) {
	bool has_filter =
	listener_filter && listener_filter->HasKey(keys::kWindowTypesKey);
	// Cleanup previous values.
	event->filter_info = EventFilteringInfo();
	// Only set the window type if the listener has set a filter.
	// Otherwise we set the window visibility relative to the extension.
	if (has_filter)
	event->filter_info.SetWindowType(window_controller->GetWindowTypeText());
	else
	event->filter_info.SetWindowExposedByDefault(
	window_controller->IsVisibleToExtension(extension));
	return true;
	}

	bool WillDispatchWindowFocusedEvent(
	WindowController* window_controller,
	BrowserContext* context,
	const Extension* extension,
	Event* event,
	const base::DictionaryValue* listener_filter) {
	int window_id = extension_misc::kUnknownWindowId;
	Profile* new_active_context = nullptr;
	bool has_filter =
	listener_filter && listener_filter->HasKey(keys::kWindowTypesKey);

	// We might not have a window controller if the focus moves away
	// from chromium's windows.
	if (window_controller) {
	window_id = window_controller->GetWindowId();
	new_active_context = window_controller->profile();
	}

	// Cleanup previous values.
	event->filter_info = EventFilteringInfo();
	// Only set the window type if the listener has set a filter,
	// otherwise set the visibility to true (if the window is not
	// supposed to be visible by the extension, we will clear out the
	// window id later).
	if (has_filter)
	event->filter_info.SetWindowType(
	window_controller ? window_controller->GetWindowTypeText()
	: keys::kWindowTypeValueNormal);
	else
	event->filter_info.SetWindowExposedByDefault(true);

	// When switching between windows in the default and incognito profiles,
	// dispatch WINDOW_ID_NONE to extensions whose profile lost focus that
	// can't see the new focused window across the incognito boundary.
	// See crbug.com/46610.
	bool cant_cross_incognito = new_active_context &&
	new_active_context != context &&
	!util::CanCrossIncognito(extension, context);
	// If the window is not visible by the listener, we also need to
	// clear out the window id from the event.
	bool visible_to_listener = ControllerVisibleToListener(
	window_controller, extension, listener_filter);

	if (cant_cross_incognito \|\| !visible_to_listener) {
	event->event_args->Clear();
	event->event_args->AppendInteger(extension_misc::kUnknownWindowId);
	} else {
	event->event_args->Clear();
	event->event_args->AppendInteger(window_id);
	}
	return true;
	}

	} // namespace

	WindowsEventRouter::WindowsEventRouter(Profile* profile)
	: profile_(profile),
	focused_profile_(nullptr),
	focused_window_id_(extension_misc::kUnknownWindowId),
	observed_app_registry_(this),
	observed_controller_list_(this) {
	DCHECK(!profile->IsOffTheRecord());

	observed_app_registry_.Add(AppWindowRegistry::Get(profile_));
	observed_controller_list_.Add(WindowControllerList::GetInstance());
	// Needed for when no suitable window can be passed to an extension as the
	// currently focused window. On Mac (even in a toolkit-views build) always
	// rely on the notification sent by AppControllerMac after AppKit sends
	// NSWindowDidBecomeKeyNotification and there is no [NSApp keyWindo7w]. This
	// allows windows not created by toolkit-views to be tracked.
	// TODO(tapted): Remove the ifdefs (and NOTIFICATION_NO_KEY_WINDOW) when
	// Chrome on Mac only makes windows with toolkit-views.
	#if defined(OS_MACOSX)
	registrar_.Add(this, chrome::NOTIFICATION_NO_KEY_WINDOW,
	content::NotificationService::AllSources());
	#elif defined(TOOLKIT_VIEWS)
	views::WidgetFocusManager::GetInstance()->AddFocusChangeListener(this);
	#else
	#error Unsupported
	#endif

	AppWindowRegistry* registry = AppWindowRegistry::Get(profile_);
	for (AppWindow* app_window : registry->app_windows())
	AddAppWindow(app_window);
	}

	WindowsEventRouter::~WindowsEventRouter() {
	#if !defined(OS_MACOSX)
	views::WidgetFocusManager::GetInstance()->RemoveFocusChangeListener(this);
	#endif
	}

	void WindowsEventRouter::OnAppWindowAdded(extensions::AppWindow* app_window) {
	if (!profile_->IsSameProfile(
	Profile::FromBrowserContext(app_window->browser_context())))
	return;
	AddAppWindow(app_window);
	}

	void WindowsEventRouter::OnAppWindowRemoved(extensions::AppWindow* app_window) {
	if (!profile_->IsSameProfile(
	Profile::FromBrowserContext(app_window->browser_context())))
	return;

	app_windows_.erase(app_window->session_id().id());
	}

	void WindowsEventRouter::OnAppWindowActivated(
	extensions::AppWindow* app_window) {
	AppWindowMap::const_iterator iter =
	app_windows_.find(app_window->session_id().id());
	OnActiveWindowChanged(iter != app_windows_.end() ? iter->second.get()
	: nullptr);
	}

	void WindowsEventRouter::OnWindowControllerAdded(
	WindowController* window_controller) {
	if (!HasEventListener(windows::OnCreated::kEventName))
	return;
	if (!profile_->IsSameProfile(window_controller->profile()))
	return;

	std::unique_ptr<base::ListValue> args(new base::ListValue());
	args->Append(window_controller->CreateWindowValue());
	DispatchEvent(events::WINDOWS_ON_CREATED, windows::OnCreated::kEventName,
	window_controller, std::move(args));
	}

	void WindowsEventRouter::OnWindowControllerRemoved(
	WindowController* window_controller) {
	if (!HasEventListener(windows::OnRemoved::kEventName))
	return;
	if (!profile_->IsSameProfile(window_controller->profile()))
	return;

	int window_id = window_controller->GetWindowId();
	std::unique_ptr<base::ListValue> args(new base::ListValue());
	args->AppendInteger(window_id);
	DispatchEvent(events::WINDOWS_ON_REMOVED, windows::OnRemoved::kEventName,
	window_controller, std::move(args));
	}

	#if !defined(OS_MACOSX)
	void WindowsEventRouter::OnNativeFocusChanged(gfx::NativeView focused_now) {
	if (!focused_now)
	OnActiveWindowChanged(nullptr);
	}
	#endif

	void WindowsEventRouter::Observe(
	int type,
	const content::NotificationSource& source,
	const content::NotificationDetails& details) {
	#if defined(OS_MACOSX)
	if (chrome::NOTIFICATION_NO_KEY_WINDOW == type) {
	OnActiveWindowChanged(nullptr);
	return;
	}
	#endif
	}

	void WindowsEventRouter::OnActiveWindowChanged(
	WindowController* window_controller) {
	Profile* window_profile = nullptr;
	int window_id = extension_misc::kUnknownWindowId;
	if (window_controller &&
	profile_->IsSameProfile(window_controller->profile())) {
	window_profile = window_controller->profile();
	window_id = window_controller->GetWindowId();
	}

	if (focused_window_id_ == window_id)
	return;

	// window_profile is either the default profile for the active window, its
	// incognito profile, or nullptr if the previous profile is losing focus.
	focused_profile_ = window_profile;
	focused_window_id_ = window_id;

	if (!HasEventListener(windows::OnFocusChanged::kEventName))
	return;

	std::unique_ptr<Event> event(new Event(
	events::WINDOWS_ON_FOCUS_CHANGED, windows::OnFocusChanged::kEventName,
	base::WrapUnique(new base::ListValue())));
	event->will_dispatch_callback =
	base::Bind(&WillDispatchWindowFocusedEvent, window_controller);
	EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
	}

	void WindowsEventRouter::DispatchEvent(events::HistogramValue histogram_value,
	const std::string& event_name,
	WindowController* window_controller,
	std::unique_ptr<base::ListValue> args) {
	std::unique_ptr<Event> event(
	new Event(histogram_value, event_name, std::move(args)));
	event->restrict_to_browser_context = window_controller->profile();
	event->will_dispatch_callback =
	base::Bind(&WillDispatchWindowEvent, window_controller);
	EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
	}

	bool WindowsEventRouter::HasEventListener(const std::string& event_name) {
	return EventRouter::Get(profile_)->HasEventListener(event_name);
	}

	void WindowsEventRouter::AddAppWindow(extensions::AppWindow* app_window) {
	std::unique_ptr<AppWindowController> controller(new AppWindowController(
	app_window, base::WrapUnique(new AppBaseWindow(app_window)), profile_));
	app_windows_[app_window->session_id().id()] = std::move(controller);
	}

	} // namespace extensions