cros: Allow JS to control virtual keyboard on sign-in screen.

chrome/browser/chromeos/login/ui/webui_login_view.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/ui/webui_login_view.h"
 
 #include "ash/focus_cycler.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
@@ skipping 36 matching lines @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/renderer_preferences.h"
 #include "extensions/browser/view_type_utils.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/keyboard/keyboard_controller.h"
 #include "ui/views/controls/webview/webview.h"
 #include "ui/views/widget/widget.h"
 
 using content::NativeWebKeyboardEvent;
 using content::RenderViewHost;
 using content::WebContents;
 using web_modal::WebContentsModalDialogManager;
 
 namespace {
 
@@ skipping 37 matching lines @@
 namespace chromeos {
 
 // static
 const char WebUILoginView::kViewClassName[] =
     "browser/chromeos/login/WebUILoginView";
 
 // WebUILoginView public: ------------------------------------------------------
 
 WebUILoginView::WebUILoginView(const WebViewSettings& settings)
     : settings_(settings) {
+  if (keyboard::KeyboardController::GetInstance()) {
+    keyboard::KeyboardController::GetInstance()->AddObserver(this);
+    is_observing_keyboard_ = true;
+  }
+  ash::Shell::Get()->AddShellObserver(this);
+
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN,
                  content::NotificationService::AllSources());
 
   accel_map_[ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE)] =
       kAccelNameCancel;
   accel_map_[ui::Accelerator(ui::VKEY_E,
@@ skipping 40 matching lines @@
       kAccelNameBootstrappingSlave;
 
   for (AccelMap::iterator i(accel_map_.begin()); i != accel_map_.end(); ++i)
     AddAccelerator(i->first);
 }
 
 WebUILoginView::~WebUILoginView() {
   for (auto& observer : observer_list_)
     observer.OnHostDestroying();
 
+  ash::Shell::Get()->RemoveShellObserver(this);
+  if (keyboard::KeyboardController::GetInstance() && is_observing_keyboard_) {
+    keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+    is_observing_keyboard_ = false;
+  }
+
   if (!ash_util::IsRunningInMash() &&
       ash::Shell::Get()->HasPrimaryStatusArea()) {
     ash::Shell::Get()->GetPrimarySystemTray()->SetNextFocusableView(nullptr);
   } else {
     NOTIMPLEMENTED();
   }
 
   // Clear any delegates we have set on the WebView.
   WebContents* web_contents = web_view()->GetWebContents();
   WebContentsModalDialogManager::FromWebContents(web_contents)
@@ skipping 215 matching lines @@
     }
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 }
 
 views::WebView* WebUILoginView::web_view() {
   return webui_login_.get();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// ash::ShellObserver:
+
+void WebUILoginView::OnVirtualKeyboardStateChanged(bool activated,
+                                                   ash::WmWindow* root_window) {
+  if (keyboard::KeyboardController::GetInstance()) {

[achuithb, 2017/04/12 19:00:26]

Let's use a temp var for this?

[jdufault, 2017/04/13 00:34:42]

Done.

+    if (activated) {
+      if (!is_observing_keyboard_) {
+        keyboard::KeyboardController::GetInstance()->AddObserver(this);
+        is_observing_keyboard_ = true;

[achuithb, 2017/04/12 19:00:26]

Is the purpose of is_observing_keyboard_ just to prevent double insertion into
KeyboardController's ObserverList? We could just use HasObserver instead:
auto keyboard_controller = keyboard::KeyboardController::GetInstance();
if (!keyboard_controller->HasObserver(this))
  keyboard_controller->AddObserver(this);

[jdufault, 2017/04/13 00:34:42]

Done.

+      }
+    } else {
+      keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+      is_observing_keyboard_ = false;
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// keyboard::KeyboardControllerObserver:
+
+void WebUILoginView::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
+  if (new_bounds.IsEmpty()) {
+    // Keyboard has been hidden.
+    if (GetOobeUI()) {
+      GetOobeUI()->GetCoreOobeView()->ShowControlBar(true);

[achuithb, 2017/04/12 19:00:26]

Use a temp var for this?

CoreOobeView* core_oobe_view = GetOobeUI() ? GetOObeUI()->GetCoreOobeView() :
nullptr;

[jdufault, 2017/04/13 00:34:42]

Done.

+      GetOobeUI()->GetCoreOobeView()->SetVirtualKeyboardShown(false);
+    }
+  } else {
+    // Keyboard has been shown.
+    if (GetOobeUI()) {
+      GetOobeUI()->GetCoreOobeView()->ShowControlBar(false);
+      GetOobeUI()->GetCoreOobeView()->SetVirtualKeyboardShown(true);
+    }
+  }
+}
+
+void WebUILoginView::OnKeyboardClosed() {}
+
 // WebUILoginView private: -----------------------------------------------------
 
 bool WebUILoginView::HandleContextMenu(
     const content::ContextMenuParams& params) {
   // Do not show the context menu.
 #ifndef NDEBUG
   return false;
 #else
   return true;
 #endif
@@ skipping 84 matching lines @@
   if (should_emit_login_prompt_visible_) {
     VLOG(1) << "Login WebUI >> login-prompt-visible";
     chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
         EmitLoginPromptVisible();
   }
 
   webui_visible_ = true;
 }
 
 }  // namespace chromeos