Add device policy: Kiosk Virtual Keyboard Layout.

chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc

 // Copyright 2013 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/ui/ash/launcher/chrome_launcher_controller.h"
 
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 428 matching lines @@
 }
 
 void ChromeLauncherController::Init() {
   CreateBrowserShortcutLauncherItem();
   UpdateAppLaunchersFromPref();
 
   // TODO(sky): update unit test so that this test isn't necessary.
   if (ash::Shell::HasInstance()) {
     SetShelfAutoHideBehaviorFromPrefs();
     SetShelfAlignmentFromPrefs();
+    SetVirtualKeyboardBehaviorFromPrefs();
     PrefServiceSyncable* prefs = PrefServiceSyncable::FromProfile(profile_);
     if (!prefs->FindPreference(prefs::kShelfAlignmentLocal)->HasUserSetting() ||
         !prefs->FindPreference(prefs::kShelfAutoHideBehaviorLocal)->
             HasUserSetting()) {
       // This causes OnIsSyncingChanged to be called when the value of
       // PrefService::IsSyncing() changes.
       prefs->AddObserver(this);
     }
     ash::Shell::GetInstance()->AddShellObserver(this);
   }
@@ skipping 662 matching lines @@
   AttachProfile(ProfileManager::GetActiveUserProfile());
   // Update the V1 applications.
   browser_status_monitor_->ActiveUserChanged(user_email);
   // Switch the running applications to the new user.
   app_window_controller_->ActiveUserChanged(user_email);
   // Update the user specific shell properties from the new user profile.
   UpdateAppLaunchersFromPref();
   SetShelfAlignmentFromPrefs();
   SetShelfAutoHideBehaviorFromPrefs();
   SetShelfBehaviorsFromPrefs();
+  SetVirtualKeyboardBehaviorFromPrefs();
   // Restore the order of running, but unpinned applications for the activated
   // user.
   RestoreUnpinnedRunningApplicationOrder(user_email);
   // Inform the system tray of the change.
   ash::Shell::GetInstance()->system_tray_delegate()->ActiveUserWasChanged();
   // Force on-screen keyboard to reset.
   if (keyboard::IsKeyboardEnabled())
     ash::Shell::GetInstance()->CreateKeyboard();
 }
 
@@ skipping 562 matching lines @@
       alignment = ash::SHELF_ALIGNMENT_TOP;
     ash::Shell::GetInstance()->SetShelfAlignment(alignment, *iter);
   }
 }
 
 void ChromeLauncherController::SetShelfBehaviorsFromPrefs() {
   SetShelfAutoHideBehaviorFromPrefs();
   SetShelfAlignmentFromPrefs();
 }
 
+void ChromeLauncherController::SetVirtualKeyboardBehaviorFromPrefs() {
+  PrefService* service = profile_->GetPrefs();
+  if (!service->HasPrefPath(prefs::kVirtualKeyboardEnabled)) {

[bartfab (slow), 2014/06/13 12:15:53]

Rather than checking whether the pref exists, just #ifdef this method so that it
runs on platforms that have the pref only.

[rsadam, 2014/06/13 15:28:46]

Won't we need this check even if we ifdef? For example, in ChromeOS,
prefs::kVirtualKeyboardEnabled will be defined, but it's not necessary that the
administrator will set a value for this policy.

+    keyboard::SetKeyboardShowOverride(keyboard::KEYBOARD_SHOW_OVERRIDE_NONE);

[bartfab (slow), 2014/06/13 12:15:53]

This does not look right to me: You take a per-profile setting and apply it to a
browser-global setting. What if I log in with two profiles and switch between
them? The keyboard setting should follow each profile's setting.

[rsadam, 2014/06/13 15:28:46]

I believe that this would follow the profile settings. There's a method
ActiveUserChanged in chrome_launcher_controller that will cause the preference
to be updated when you switch between profiles.

+  } else {
+    bool enabled = service->GetBoolean(prefs::kVirtualKeyboardEnabled);
+    keyboard::SetKeyboardShowOverride(
+        enabled ? keyboard::KEYBOARD_SHOW_OVERRIDE_ENABLED
+                : keyboard::KEYBOARD_SHOW_OVERRIDE_DISABLED);
+  }
+}
+
 ash::ShelfItemStatus ChromeLauncherController::GetAppState(
     const::std::string& app_id) {
   ash::ShelfItemStatus status = ash::STATUS_CLOSED;
   for (WebContentsToAppIDMap::iterator it = web_contents_to_app_id_.begin();
        it != web_contents_to_app_id_.end();
        ++it) {
     if (it->second == app_id) {
       Browser* browser = chrome::FindBrowserWithWebContents(it->first);
       // Usually there should never be an item in our |web_contents_to_app_id_|
       // list which got deleted already. However - in some situations e.g.
@@ skipping 300 matching lines @@
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kShelfAutoHideBehaviorLocal,
       base::Bind(&ChromeLauncherController::
                      SetShelfAutoHideBehaviorFromPrefs,
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kShelfPreferences,
       base::Bind(&ChromeLauncherController::SetShelfBehaviorsFromPrefs,
                  base::Unretained(this)));
+  pref_change_registrar_.Add(
+      prefs::kVirtualKeyboardEnabled,
+      base::Bind(&ChromeLauncherController::SetVirtualKeyboardBehaviorFromPrefs,
+                 base::Unretained(this)));
 }
 
 void ChromeLauncherController::ReleaseProfile() {
   if (app_sync_ui_state_)
     app_sync_ui_state_->RemoveObserver(this);
 
   PrefServiceSyncable::FromProfile(profile_)->RemoveObserver(this);
 
   pref_change_registrar_.RemoveAll();
 }