Remove virtual keyboard support.

chrome/browser/chromeos/input_method/virtual_keyboard_selector.h

-// Copyright (c) 2011 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.
-
-#ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_VIRTUAL_KEYBOARD_SELECTOR_H_
-#define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_VIRTUAL_KEYBOARD_SELECTOR_H_
-#pragma once
-
-#include <list>
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/basictypes.h"
-#include "googleurl/src/gurl.h"
-
-namespace chromeos {
-namespace input_method {
-
-// A class which represents a virtual keyboard extension. One virtual keyboard
-// extension can support more than one keyboard layout.
-class VirtualKeyboard {
- public:
-  VirtualKeyboard(const GURL& url,
-                  const std::string& name,
-                  const std::set<std::string>& supported_layouts,
-                  bool is_system);
-  ~VirtualKeyboard();
-
-  // Returns URL for displaying the keyboard UI specified by |layout|.
-  // For example, when |url_| is "http://adcfj..kjhil/" and |layout| is "us",
-  // the function would return "http://adcfj..kjhil/index.html#us". When
-  // |layout| is empty, it returns |url_| as-is, which is "http://adcfj..kjhil/"
-  // in this case.
-  GURL GetURLForLayout(const std::string& layout) const;
-
-  // Returns true if the virtual keyboard extension supports the |layout|.
-  bool IsLayoutSupported(const std::string& layout) const;
-
-  const GURL& url() const { return url_; }
-  const std::string& name() const { return name_; }
-  const std::set<std::string>& supported_layouts() const {
-    return supported_layouts_;
-  }
-  bool is_system() const { return is_system_; }
-
- private:
-  const GURL url_;
-  const std::string name_;
-  const std::set<std::string> supported_layouts_;
-  const bool is_system_;
-
-  DISALLOW_COPY_AND_ASSIGN(VirtualKeyboard);
-};
-
-// A class which holds all available virtual keyboard extensions.
-class VirtualKeyboardSelector {
- public:
-  VirtualKeyboardSelector();
-  ~VirtualKeyboardSelector();
-
-  // Adds a new virtual keyboard extension. If |keyboard.is_system_| is true,
-  // the virtual keyboard extension will have lower priority than non-system
-  // keyboard extensions. Returns false if a virtual keyboard extension
-  // specified by the |url| is already added.
-  // TODO(yusukes): Add RemoveVirtualKeyboard() as well.
-  bool AddVirtualKeyboard(const GURL& url,
-                          const std::string& name,
-                          const std::set<std::string>& supported_layouts,
-                          bool is_system);
-
-  // Selects and returns the most suitable virtual keyboard extension for the
-  // |layout|. Returns NULL if no virtual keyboard extension for the layout
-  // is found. If a specific virtual keyboard extension for the |layout| is
-  // already set by SetUserPreference, the virtual keyboard extension is always
-  // returned. If |current_|, which is the virtual keyboard extension currently
-  // in use, supports the |layout|, the current one will be returned. Otherwise
-  // the function scans the list of |keyboards_| and then the list of
-  // |system_keyboards_|. The most recently added keyboards to each list take
-  // precedence.
-  //
-  // Checking the |current_| keyboard is important for the following use case:
-  // - If I have installed a VK extension that provides a US and an FR layout
-  //   and I switch from the US layout of the extension (+ English IME) to the
-  //   French IME, then I would like to use the FR layout of the extension I am
-  //   currently using.
-  const VirtualKeyboard* SelectVirtualKeyboard(const std::string& layout);
-
-  // Sets user preferences on virtual keyboard selection so that the virtual
-  // keyboard extension specified by the |url| is always selected for the
-  // |layout|. Returns false if a virtual keyboard extension whose address is
-  // |url| is not registered, or the extension specified by the |url| does not
-  // support the |layout|.
-  bool SetUserPreference(const std::string& layout, const GURL& url);
-
-  // Removes the preference for the |layout| added by SetUserPreference.
-  void RemoveUserPreference(const std::string& layout);
-
-  // Removes all preferences added by SetUserPreference.
-  void ClearAllUserPreferences();
-
-  const std::map<GURL, const VirtualKeyboard*>& url_to_keyboard() const {
-    return url_to_keyboard_;
-  }
-
-  const std::multimap<
-    std::string, const VirtualKeyboard*>& layout_to_keyboard() const {
-    return layout_to_keyboard_;
-  }
-
- protected:
-  // Selects and returns the most suitable virtual keyboard extension for the
-  // |layout|. Unlike SelectVirtualKeyboard(), this function only scans
-  // |keyboards_| and |system_keyboards_| (in this order), and never updates
-  // |current_|. The function is protected for testability.
-  const VirtualKeyboard* SelectVirtualKeyboardWithoutPreferences(
-      const std::string& layout);
-
-  // The function is protected for testability.
-  const std::map<std::string, const VirtualKeyboard*>& user_preference() const {
-    return user_preference_;
-  }
-
- private:
-  // A list of third party virtual keyboard extensions.
-  std::list<const VirtualKeyboard*> keyboards_;
-  // A list of system virtual keyboard extensions.
-  std::list<const VirtualKeyboard*> system_keyboards_;
-
-  // A map from layout name to virtual keyboard extension.
-  std::map<std::string, const VirtualKeyboard*> user_preference_;
-
-  // TODO(yusukes): Support per-site preference. e.g. always use virtual
-  // keyboard ABC on https://mail.google.com/, XYZ on http://www.google.com/.
-
-  // The virtual keyboard currently in use.
-  const VirtualKeyboard* current_;
-
-  // A map from URL to virtual keyboard extension. The map is for making
-  // SetUserPreference() faster.
-  std::map<GURL, const VirtualKeyboard*> url_to_keyboard_;
-
-  // A *multi* map from layout name to virtual keyboard extension. An example
-  // value of the variable would be: { "us": extension1,
-  //                                   "us(dvorak)": extension1,
-  //                                   "us": extension2 }
-  std::multimap<std::string, const VirtualKeyboard*> layout_to_keyboard_;
-
-  DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardSelector);
-};
-
-}  // namespace input_method
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_VIRTUAL_KEYBOARD_SELECTOR_H_