Center lock screen user pod when virtual keyboard is shown.

chrome/browser/chromeos/login/lock/webui_screen_locker.cc

 // Copyright 2014 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/chromeos/login/lock/webui_screen_locker.h"
 
 #include "ash/shell.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/command_line.h"
@@ skipping 15 matching lines @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_ui.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/screen.h"
+#include "ui/keyboard/keyboard_controller.h"
+#include "ui/keyboard/keyboard_util.h"
 #include "ui/views/controls/webview/webview.h"
 
 namespace {
 
 // URL which corresponds to the login WebUI.
 const char kLoginURL[] = "chrome://oobe/lock";
 
+// Disables virtual keyboard overscroll. Login UI will scroll user pods
+// into view on JS side when virtual keyboard is shown.
+void DisableKeyboardOverscroll() {
+  keyboard::SetKeyboardOverscrollOverride(
+      keyboard::KEYBOARD_OVERSCROLL_OVERRIDE_DISABLED);
+}
+
+void ResetKeyboardOverscrollOverride() {
+  keyboard::SetKeyboardOverscrollOverride(
+      keyboard::KEYBOARD_OVERSCROLL_OVERRIDE_NONE);
+}
+
 }  // namespace
 
 namespace chromeos {
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebUIScreenLocker implementation.
 
 WebUIScreenLocker::WebUIScreenLocker(ScreenLocker* screen_locker)
     : ScreenLockerDelegate(screen_locker),
       lock_ready_(false),
       webui_ready_(false),
       network_state_helper_(new login::NetworkStateHelper),
+      is_observing_keyboard_(false),
       weak_factory_(this) {
   set_should_emit_login_prompt_visible(false);
   ash::Shell::GetInstance()->lock_state_controller()->AddObserver(this);
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
+
+  if (keyboard::KeyboardController::GetInstance()) {
+    keyboard::KeyboardController::GetInstance()->AddObserver(this);
+    is_observing_keyboard_ = true;
+  }
+
+  ash::Shell::GetInstance()->delegate()->AddVirtualKeyboardStateObserver(this);
 }
 
 void WebUIScreenLocker::LockScreen() {
   gfx::Rect bounds(ash::Shell::GetScreen()->GetPrimaryDisplay().bounds());
 
   lock_time_ = base::TimeTicks::Now();
   LockWindow* lock_window = LockWindow::Create();
   lock_window->set_observer(this);
   lock_window_ = lock_window->GetWidget();
   lock_window_->AddObserver(this);
   WebUILoginView::Init();
   lock_window_->SetContentsView(this);
   lock_window_->Show();
   LoadURL(GURL(kLoginURL));
   lock_window->Grab();
 
   login_display_.reset(new WebUILoginDisplay(this));
   login_display_->set_background_bounds(bounds);
   login_display_->set_parent_window(GetNativeWindow());
   login_display_->Init(screen_locker()->users(), false, true, false);
 
-  static_cast<OobeUI*>(GetWebUI()->GetController())->ShowSigninScreen(
+  GetOobeUI()->ShowSigninScreen(
       LoginScreenContext(), login_display_.get(), login_display_.get());
 
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED,
                  content::NotificationService::AllSources());
+
+  if (login::LockScrollIntoViewEnabled())
+    DisableKeyboardOverscroll();
 }
 
 void WebUIScreenLocker::ScreenLockReady() {
   UMA_HISTOGRAM_TIMES("LockScreen.LockReady",
                       base::TimeTicks::Now() - lock_time_);
   ScreenLockerDelegate::ScreenLockReady();
   SetInputEnabled(true);
 }
 
 void WebUIScreenLocker::OnAuthenticate() {
@@ skipping 42 matching lines @@
   if (lock_window_) {
     lock_window_->RemoveObserver(this);
     lock_window_->Close();
   }
   // If LockScreen() was called, we need to clear the signin screen handler
   // delegate set in ShowSigninScreen so that it no longer points to us.
   if (login_display_.get()) {
     static_cast<OobeUI*>(GetWebUI()->GetController())->
         ResetSigninScreenHandlerDelegate();
   }
+
+  if (keyboard::KeyboardController::GetInstance() && is_observing_keyboard_) {
+    keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+    is_observing_keyboard_ = false;
+  }
+
+  ash::Shell::GetInstance()->delegate()->
+      RemoveVirtualKeyboardStateObserver(this);
+
+  if (login::LockScrollIntoViewEnabled())
+    ResetKeyboardOverscrollOverride();
 }
 
 void WebUIScreenLocker::OnLockWebUIReady() {
   VLOG(1) << "WebUI ready; lock window is "
           << (lock_ready_ ? "too" : "not");
   webui_ready_ = true;
   if (lock_ready_)
     ScreenLockReady();
 }
 
 void WebUIScreenLocker::OnLockBackgroundDisplayed() {
   UMA_HISTOGRAM_TIMES("LockScreen.BackgroundReady",
                       base::TimeTicks::Now() - lock_time_);
 }
 
+OobeUI* WebUIScreenLocker::GetOobeUI() {
+  return static_cast<OobeUI*>(GetWebUI()->GetController());
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // WebUIScreenLocker, content::NotificationObserver implementation:
 
 void WebUIScreenLocker::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED: {
       const User& user = *content::Details<User>(details).ptr();
@@ skipping 142 matching lines @@
 }
 
 void WebUIScreenLocker::RenderProcessGone(base::TerminationStatus status) {
   if (browser_shutdown::GetShutdownType() == browser_shutdown::NOT_VALID &&
       status != base::TERMINATION_STATUS_NORMAL_TERMINATION) {
     LOG(ERROR) << "Renderer crash on lock screen";
     Signout();
   }
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// ash::KeyboardStateObserver overrides.
+
+void WebUIScreenLocker::OnVirtualKeyboardStateChanged(bool activated) {
+  if (keyboard::KeyboardController::GetInstance()) {
+    if (activated) {
+      if (!is_observing_keyboard_) {
+        keyboard::KeyboardController::GetInstance()->AddObserver(this);
+        is_observing_keyboard_ = true;
+      }
+    } else {
+      keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+      is_observing_keyboard_ = false;
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// keyboard::KeyboardControllerObserver overrides.
+
+void WebUIScreenLocker::OnKeyboardBoundsChanging(
+    const gfx::Rect& new_bounds) {
+  if (new_bounds.IsEmpty() && !keyboard_bounds_.IsEmpty()) {
+    // Keyboard has been hidden.
+    if (GetOobeUI()) {
+      GetOobeUI()->GetCoreOobeActor()->ShowControlBar(true);
+      if (login::LockScrollIntoViewEnabled())
+        GetOobeUI()->GetCoreOobeActor()->SetKeyboardState(false, new_bounds);
+    }
+  } else if (!new_bounds.IsEmpty() && keyboard_bounds_.IsEmpty()) {
+    // Keyboard has been shown.
+    if (GetOobeUI()) {
+      GetOobeUI()->GetCoreOobeActor()->ShowControlBar(false);
+      if (login::LockScrollIntoViewEnabled())
+        GetOobeUI()->GetCoreOobeActor()->SetKeyboardState(true, new_bounds);
+    }
+  }
+
+  keyboard_bounds_ = new_bounds;
+}
+
 }  // namespace chromeos