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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_DBUS_IBUS_IBUS_INPUT_CONTEXT_CLIENT_H_
#define CHROMEOS_DBUS_IBUS_IBUS_INPUT_CONTEXT_CLIENT_H_
#pragma once
#include "base/bind.h"
#include "base/callback.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/dbus_client_implementation_type.h"
#include "dbus/object_path.h"
namespace dbus {
class Bus;
} // namespace dbus
namespace chromeos {
// TODO(nona): Remove ibus namespace after complete libibus removal.
namespace ibus {
class IBusText;
} // namespace
// A class to make the actual DBus calls for IBusInputContext service.
// The ibus-daemon creates object paths on demand, so the target object path is
// not determined before calling CreateInputContext. It is good to initialize
// this class at the callback from CreateInputContext in IBusClient. This class
// is managed by DBusThreadManager as singleton instance, so we can handle only
// one input context but it is enough for ChromeOS.
class CHROMEOS_EXPORT IBusInputContextClient {
public:
typedef base::Callback<void(const ibus::IBusText& text)> CommitTextHandler;
typedef base::Callback<void(uint32 keyval, uint32 keycode, uint32 state)>
ForwardKeyEventHandler;
typedef base::Callback<void(const ibus::IBusText& text,
uint32 cursor_pos,
bool visible)>
UpdatePreeditTextHandler;
typedef base::Callback<void()> ShowPreeditTextHandler;
typedef base::Callback<void()> HidePreeditTextHandler;
typedef base::Callback<void(bool is_keyevent_used)> ProcessKeyEventCallback;
virtual ~IBusInputContextClient();
// Creates object proxy and connects signals.
virtual void Initialize(dbus::Bus* bus,
const dbus::ObjectPath& object_path) = 0;
// Resets object proxy. If you want to use InputContext again, should call
// Initialize function again.
virtual void ResetObjectProxy() = 0;
// Returns true if connected to target input context path, otherwise return
// false.
virtual bool IsConnected() const = 0;
// Signal handler accessors. Setting function can be called multiple times. If
// you call setting function multiple times, previous callback will be
// overwritten.
// Sets CommitText signal handler.
virtual void SetCommitTextHandler(
const CommitTextHandler& commit_text_handler) = 0;
// Sets ForwardKeyEvent signal handler.
virtual void SetForwardKeyEventHandler(
const ForwardKeyEventHandler& forward_key_event_handler) = 0;
// Sets UpdatePreeditText signal handler.
virtual void SetUpdatePreeditTextHandler(
const UpdatePreeditTextHandler& update_preedit_text_handler) = 0;
// Sets ShowPreeditText signal handler.
virtual void SetShowPreeditTextHandler(
const ShowPreeditTextHandler& show_preedit_text_handler) = 0;
// Sets HidePreeditText signal handler.
virtual void SetHidePreeditTextHandler(
const HidePreeditTextHandler& hide_preedit_text_handler) = 0;
// Unsets CommitText signal handler.
virtual void UnsetCommitTextHandler() = 0;
// Unsets FowardKeyEvent signal handler.
virtual void UnsetForwardKeyEventHandler() = 0;
// Unsets UpdatePreeditText signal handler.
virtual void UnsetUpdatePreeditTextHandler() = 0;
// Unsets ShowPreeditText signal handler.
virtual void UnsetShowPreeditTextHandler() = 0;
// Unsets HidePreeditText signal handler.
virtual void UnsetHidePreeditTextHandler() = 0;
// Invokes SetCapabilities method call.
virtual void SetCapabilities(uint32 capability) = 0;
// Invokes FocusIn method call.
virtual void FocusIn() = 0;
// Invokes FocusOut method call.
virtual void FocusOut() = 0;
// Invokes Reset method call.
virtual void Reset() = 0;
// Invokes SetCursorLocation method call.
virtual void SetCursorLocation(int32 x, int32 y, int32 width,
int32 height) = 0;
// Invokes ProcessKeyEvent method call. |callback| shold not be null-callback.
virtual void ProcessKeyEvent(uint32 keyval,
uint32 keycode,
uint32 state,
const ProcessKeyEventCallback& callback) = 0;
// Factory function, creates a new instance and returns ownership.
// For normal usage, access the singleton via DBusThreadManager::Get().
static CHROMEOS_EXPORT IBusInputContextClient* Create(
DBusClientImplementationType type);
protected:
// Create() should be used instead.
IBusInputContextClient();
private:
DISALLOW_COPY_AND_ASSIGN(IBusInputContextClient);
};
} // namespace chromeos
#endif // CHROMEOS_DBUS_IBUS_IBUS_INPUT_CONTEXT_CLIENT_H_
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