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);
+  // TODO(crbug.com/648733): OnVirtualKeyboardStateChanged not supported in mash
+  if (!ash_util::IsRunningInMash())
+    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();
 
+  // TODO(crbug.com/648733): OnVirtualKeyboardStateChanged not supported in mash
+  if (!ash_util::IsRunningInMash())
+    ash::Shell::Get()->RemoveShellObserver(this);
+  if (keyboard::KeyboardController::GetInstance())

[achuithb, 2017/04/13 21:49:41]

Don't we need a HasObserver test here? In case AddObserver was not called

[achuithb, 2017/04/13 21:51:28]

Actually feel free to ignore this

+    keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
+
   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) {
+  auto* keyboard_controller = keyboard::KeyboardController::GetInstance();
+  if (keyboard_controller) {
+    if (activated) {
+      if (!keyboard_controller->HasObserver(this))
+        keyboard_controller->AddObserver(this);
+    } else {
+      keyboard_controller->RemoveObserver(this);
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// keyboard::KeyboardControllerObserver:
+
+void WebUILoginView::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
+  if (!GetOobeUI())
+    return;
+  CoreOobeView* view = GetOobeUI()->GetCoreOobeView();
+  if (new_bounds.IsEmpty()) {
+    // Keyboard has been hidden.
+    view->ShowControlBar(true);

[xiyuan, 2017/04/13 05:03:07]

We should update LoginDisplayHostImpl [1] to consolidate the VK code.

[1]
https://cs.chromium.org/chromium/src/chrome/browser/chromeos/login/ui/login_d...

[jdufault, 2017/04/13 20:29:51]

Done.

+    view->SetVirtualKeyboardShown(false);
+  } else {
+    // Keyboard has been shown.
+    view->ShowControlBar(false);
+    view->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