DRAFT: Add setKeyboardVisibility API.

ui/keyboard/keyboard_ui_handler.cc

 // Copyright (c) 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 "ui/keyboard/keyboard_ui_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/values.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "content/public/browser/web_ui.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/events/event.h"
 #include "ui/keyboard/keyboard_util.h"
 
 namespace keyboard {
 
 KeyboardUIHandler::KeyboardUIHandler() {
 }
 
 KeyboardUIHandler::~KeyboardUIHandler() {
 }
 
 void KeyboardUIHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
+      "setKeyboardVisibility",

[sadrul, 2013/05/14 06:23:19]

Will this be ever used to show the keyboard? i.e. will the keyboard JS be able
to show itself while it was hidden? If it does, what would be the target of the
key events (e.g. no view/window is currently focused, or if the focused
view/window does not accept text input etc.)?

+      base::Bind(&KeyboardUIHandler::HandleSendKeyEventMessage,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
       "sendKeyEvent",
       base::Bind(&KeyboardUIHandler::HandleSendKeyEventMessage,
                  base::Unretained(this)));
 }
 
+void KeyboardUIHandler::HandleSetKeyboardVisibility(
+    const base::ListValue* args) {
+  bool visible;
+  if (!args->GetBoolean(0, &visible)) {
+    LOG(ERROR) << "setKeyboardVisibility failed: argument parsing error";
+    return;
+  }
+  // TODO(sadrul): get the KeyboardController without using the Shell

[sadrul, 2013/05/14 06:23:19]

I can't think of a good way of doing this. One option would be to remove the
focus from the currently focused view/window, when the visibility is changing to
hidden.

+}
+
 void KeyboardUIHandler::HandleSendKeyEventMessage(const base::ListValue* args) {
   std::string error;
   scoped_ptr<ui::KeyEvent> event(keyboard::KeyEventFromArgs(args, &error));
   if (!event) {
     LOG(ERROR) << "sendKeyEvent failed: " << error;
     return;
   }
 
   aura::RootWindow* root_window =
       web_ui()->GetWebContents()->GetView()->GetNativeView()->GetRootWindow();
   root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(event.get());
 }
 
 }  // namespace keyboard