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// Copyright (c) 2012 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 CHROMEOS_IME_INPUT_METHOD_MANAGER_H_
#define CHROMEOS_IME_INPUT_METHOD_MANAGER_H_
#include <map>
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/ime/input_method_descriptor.h"
#include "chromeos/ime/input_method_property.h"
namespace ui {
class Accelerator;
} // namespace ui
namespace chromeos {
class ComponentExtensionIMEManager;
class InputMethodEngine;
namespace input_method {
class InputMethodUtil;
class XKeyboard;
// This class manages input methodshandles. Classes can add themselves as
// observers. Clients can get an instance of this library class by:
// InputMethodManager::Get().
class CHROMEOS_EXPORT InputMethodManager {
public:
enum State {
STATE_LOGIN_SCREEN = 0,
STATE_BROWSER_SCREEN,
STATE_LOCK_SCREEN,
STATE_TERMINATING,
};
class Observer {
public:
virtual ~Observer() {}
// Called when the current input method is changed. |show_message|
// indicates whether the user should be notified of this change.
virtual void InputMethodChanged(InputMethodManager* manager,
bool show_message) = 0;
// Called when the list of properties is changed.
virtual void InputMethodPropertyChanged(InputMethodManager* manager) = 0;
};
// CandidateWindowObserver is notified of events related to the candidate
// window. The "suggestion window" used by IMEs such as ibus-mozc does not
// count as the candidate window (this may change if we later want suggestion
// window events as well). These events also won't occur when the virtual
// keyboard is used, since it controls its own candidate window.
class CandidateWindowObserver {
public:
virtual ~CandidateWindowObserver() {}
// Called when the candidate window is opened.
virtual void CandidateWindowOpened(InputMethodManager* manager) = 0;
// Called when the candidate window is closed.
virtual void CandidateWindowClosed(InputMethodManager* manager) = 0;
};
virtual ~InputMethodManager() {}
// Gets the global instance of InputMethodManager. Initialize() must be called
// first.
static CHROMEOS_EXPORT InputMethodManager* Get();
// Sets the global instance. |instance| will be owned by the internal pointer
// and deleted by Shutdown().
// TODO(nona): Instanciate InputMethodManagerImpl inside of this function once
// crbug.com/164375 is fixed.
static CHROMEOS_EXPORT void Initialize(InputMethodManager* instance);
// Destroy the global instance.
static CHROMEOS_EXPORT void Shutdown();
// Adds an observer to receive notifications of input method related
// changes as desribed in the Observer class above.
virtual void AddObserver(Observer* observer) = 0;
virtual void AddCandidateWindowObserver(
CandidateWindowObserver* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
virtual void RemoveCandidateWindowObserver(
CandidateWindowObserver* observer) = 0;
// Returns all input methods that are supported, including ones not active.
// This function never returns NULL. Note that input method extensions are NOT
// included in the result.
virtual scoped_ptr<InputMethodDescriptors>
GetSupportedInputMethods() const = 0;
// Returns the list of input methods we can select (i.e. active) including
// extension input methods.
virtual scoped_ptr<InputMethodDescriptors> GetActiveInputMethods() const = 0;
// Returns the list of input methods we can select (i.e. active) including
// extension input methods.
// The same as GetActiveInputMethods but returns reference to internal list.
virtual const std::vector<std::string>& GetActiveInputMethodIds() const = 0;
// Returns the number of active input methods including extension input
// methods.
virtual size_t GetNumActiveInputMethods() const = 0;
// Changes the current input method to |input_method_id|. If |input_method_id|
// is not active, switch to the first one in the active input method list.
virtual void ChangeInputMethod(const std::string& input_method_id) = 0;
// Enables keyboard layouts (e.g. US Qwerty, US Dvorak, French Azerty) that
// are necessary for the |language_code| and then switches to |initial_layout|
// if the string is not empty. For example, if |language_code| is "en-US", US
// Qwerty, US International, US Extended, US Dvorak, and US Colemak layouts
// would be enabled. Likewise, for Germany locale, US Qwerty which corresponds
// to the hardware keyboard layout and several keyboard layouts for Germany
// would be enabled.
// This method is for setting up i18n keyboard layouts for the login screen.
virtual void EnableLayouts(const std::string& language_code,
const std::string& initial_layout) = 0;
// Activates the input method property specified by the |key|.
virtual void ActivateInputMethodProperty(const std::string& key) = 0;
// Updates the list of active input method IDs, and then starts or stops the
// system input method framework as needed.
virtual bool EnableInputMethods(
const std::vector<std::string>& new_active_input_method_ids) = 0;
// Adds one entry to the list of active input method IDs, and then starts or
// stops the system input method framework as needed.
virtual bool EnableInputMethod(
const std::string& new_active_input_method_id) = 0;
// Adds an input method extension. This function does not takes ownership of
// |instance|.
virtual void AddInputMethodExtension(
const std::string& id,
const std::string& name,
const std::vector<std::string>& layouts,
const std::vector<std::string>& languages,
const GURL& options_url,
const GURL& inputview_url,
InputMethodEngine* instance) = 0;
// Removes an input method extension.
virtual void RemoveInputMethodExtension(const std::string& id) = 0;
// Returns a list of descriptors for all Input Method Extensions.
virtual void GetInputMethodExtensions(InputMethodDescriptors* result) = 0;
// Sets the list of extension IME ids which should be enabled.
virtual void SetEnabledExtensionImes(std::vector<std::string>* ids) = 0;
// Sets current input method to default (first owners, then hardware).
virtual void SetInputMethodDefault() = 0;
// Gets the descriptor of the input method which is currently selected.
virtual InputMethodDescriptor GetCurrentInputMethod() const = 0;
// Gets the list of input method properties. The list could be empty().
virtual InputMethodPropertyList GetCurrentInputMethodProperties() const = 0;
// Sets the list of input method properties. The list could be empty().
virtual void SetCurrentInputMethodProperties(
const InputMethodPropertyList& property_list) = 0;
// Returns an X keyboard object which could be used to change the current XKB
// layout, change the caps lock status, and set the auto repeat rate/interval.
virtual XKeyboard* GetXKeyboard() = 0;
// Returns an InputMethodUtil object.
virtual InputMethodUtil* GetInputMethodUtil() = 0;
// Returns a ComponentExtentionIMEManager object.
virtual ComponentExtensionIMEManager* GetComponentExtensionIMEManager() = 0;
// Switches the current input method (or keyboard layout) to the next one.
virtual bool SwitchToNextInputMethod() = 0;
// Switches the current input method (or keyboard layout) to the previous one.
virtual bool SwitchToPreviousInputMethod(
const ui::Accelerator& accelerator) = 0;
// Switches to an input method (or keyboard layout) which is associated with
// the |accelerator|.
virtual bool SwitchInputMethod(const ui::Accelerator& accelerator) = 0;
// If keyboard layout can be uset at login screen
virtual bool IsLoginKeyboard(const std::string& layout) const = 0;
};
} // namespace input_method
} // namespace chromeos
#endif // CHROMEOS_IME_INPUT_METHOD_MANAGER_H_