keyboard: Simplify initialization and use in ash_shell.

After this change, executables that want to use the keyboard need to:
 * add 'keyboard' and 'keyboard_resources' as dependencies. Repacking
   keyboard_resources.pak is no longer necessary.
 * call keyboard::InitializeKeyboard() during startup. This installs
   the necessary pak file, and sets up a WebUIControllerFactory to
   make sure the keyboard gets the correct WebUIController.
 * create a KeyboardControllerProxy and a KeyboardController.

BUG=none

Review URL: https://codereview.chromium.org/14241037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195835 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 80 insertions, 0 deletions

diff --git a/ui/keyboard/keyboard.cc b/ui/keyboard/keyboard.cc
new file mode 100644
index 0000000..d41f897
--- /dev/null
+++ b/ui/keyboard/keyboard.cc
@@ -0,0 +1,80 @@
+// 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.h"
+
+#include "base/files/file_path.h"
+#include "base/memory/singleton.h"
+#include "base/path_service.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/web_ui_controller_factory.h"
+#include "googleurl/src/gurl.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/keyboard/keyboard_constants.h"
+#include "ui/keyboard/keyboard_ui_controller.h"
+
+namespace {
+
+using content::BrowserContext;
+using content::WebUI;
+using content::WebUIController;
+
+class KeyboardWebUIControllerFactory : public content::WebUIControllerFactory {
+ public:
+  // |WebUIControllerFactory| implementation:
+  virtual content::WebUI::TypeID GetWebUIType(
+      content::BrowserContext* browser_context,
+      const GURL& url) const OVERRIDE {
+    if (url == GURL(keyboard::kKeyboardWebUIURL))
+      return const_cast<KeyboardWebUIControllerFactory*>(this);
+
+    return WebUI::kNoWebUI;
+  }
+  virtual bool UseWebUIForURL(content::BrowserContext* browser_context,
+                              const GURL& url) const OVERRIDE {
+    return GetWebUIType(browser_context, url) != WebUI::kNoWebUI;
+  }
+  virtual bool UseWebUIBindingsForURL(content::BrowserContext* browser_context,
+                                      const GURL& url) const OVERRIDE {
+    return UseWebUIForURL(browser_context, url);
+  }
+  virtual content::WebUIController* CreateWebUIControllerForURL(
+      content::WebUI* web_ui,
+      const GURL& url) const OVERRIDE {
+    if (url == GURL(keyboard::kKeyboardWebUIURL))
+      return new keyboard::KeyboardUIController(web_ui);
+    return NULL;
+  }
+
+  static KeyboardWebUIControllerFactory* GetInstance() {
+    return Singleton<KeyboardWebUIControllerFactory>::get();
+  }
+
+ protected:
+  KeyboardWebUIControllerFactory() {}
+  virtual ~KeyboardWebUIControllerFactory() {}
+
+ private:
+  friend struct DefaultSingletonTraits<KeyboardWebUIControllerFactory>;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardWebUIControllerFactory);
+};
+
+}  // namespace
+
+namespace keyboard {
+
+void InitializeKeyboard() {
+  base::FilePath pak_dir;
+  PathService::Get(base::DIR_MODULE, &pak_dir);
+  base::FilePath pak_file = pak_dir.Append(
+      FILE_PATH_LITERAL("keyboard_resources.pak"));
+  ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
+      pak_file, ui::SCALE_FACTOR_100P);
+
+  content::WebUIControllerFactory::RegisterFactory(
+      KeyboardWebUIControllerFactory::GetInstance());
+}
+
+}  // namespace keyboard