Remove views::InputMethodIBus.

ui/views/ime/input_method_ibus.cc

Index: ui/views/ime/input_method_ibus.cc
diff --git a/ui/views/ime/input_method_ibus.cc b/ui/views/ime/input_method_ibus.cc
deleted file mode 100644
index 8f5087529b35dd2c74a0d0b83ed57420f2704334..0000000000000000000000000000000000000000
--- a/ui/views/ime/input_method_ibus.cc
+++ /dev/null
@@ -1,964 +0,0 @@
-// 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.
-
-// TODO(yusukes): Remove this class when TOUCH_UI migrates to Aura. For Aura,
-// ui/base/ime/input_method_* classes are available.
-
-#include "ui/views/ime/input_method_ibus.h"
-
-#include <ibus.h>
-#if defined(TOUCH_UI)
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#endif
-
-#include <algorithm>
-#include <cstring>
-#include <set>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/command_line.h"
-#include "base/i18n/char_iterator.h"
-#include "base/logging.h"
-#include "base/string_util.h"
-#include "base/third_party/icu/icu_utf.h"
-#include "base/utf_string_conversions.h"
-#include "ui/base/keycodes/keyboard_codes.h"
-#include "ui/gfx/point.h"
-#include "ui/gfx/rect.h"
-#include "ui/views/events/event.h"
-#include "ui/views/widget/widget.h"
-
-#if defined(USE_AURA)
-#include "ui/base/keycodes/keyboard_code_conversion_x.h"
-#elif defined(TOOLKIT_USES_GTK)
-#include "ui/base/keycodes/keyboard_code_conversion_gtk.h"
-#endif
-
-namespace {
-
-// A global flag to switch the InputMethod implementation to InputMethodIBus
-bool inputmethod_ibus_enabled = false;
-
-// Converts ibus key state flags to event flags.
-int EventFlagsFromIBusState(guint32 state) {
-  return (state & IBUS_LOCK_MASK ? ui::EF_CAPS_LOCK_DOWN : 0) |
-         (state & IBUS_CONTROL_MASK ? ui::EF_CONTROL_DOWN : 0) |
-         (state & IBUS_SHIFT_MASK ? ui::EF_SHIFT_DOWN : 0) |
-         (state & IBUS_MOD1_MASK ? ui::EF_ALT_DOWN : 0) |
-         (state & IBUS_BUTTON1_MASK ? ui::EF_LEFT_MOUSE_BUTTON : 0) |
-         (state & IBUS_BUTTON2_MASK ? ui::EF_MIDDLE_MOUSE_BUTTON : 0) |
-         (state & IBUS_BUTTON3_MASK ? ui::EF_RIGHT_MOUSE_BUTTON : 0);
-}
-
-// Converts event flags to ibus key state flags.
-guint32 IBusStateFromEventFlags(int flags) {
-  return (flags & ui::EF_CAPS_LOCK_DOWN ? IBUS_LOCK_MASK : 0) |
-         (flags & ui::EF_CONTROL_DOWN ? IBUS_CONTROL_MASK : 0) |
-         (flags & ui::EF_SHIFT_DOWN ? IBUS_SHIFT_MASK : 0) |
-         (flags & ui::EF_ALT_DOWN ? IBUS_MOD1_MASK : 0) |
-         (flags & ui::EF_LEFT_MOUSE_BUTTON ? IBUS_BUTTON1_MASK : 0) |
-         (flags & ui::EF_MIDDLE_MOUSE_BUTTON ? IBUS_BUTTON2_MASK : 0) |
-         (flags & ui::EF_RIGHT_MOUSE_BUTTON ? IBUS_BUTTON3_MASK : 0);
-}
-
-void IBusKeyEventFromViewsKeyEvent(const views::KeyEvent& key,
-                                   guint32* ibus_keyval,
-                                   guint32* ibus_keycode,
-                                   guint32* ibus_state) {
-#if defined(USE_AURA)
-  // TODO(yusukes): Handle native_event()?
-  *ibus_keyval = ui::XKeysymForWindowsKeyCode(
-      key.key_code(), key.IsShiftDown() ^ key.IsCapsLockDown());
-  *ibus_keycode = 0;
-#elif defined(TOUCH_UI)
-  if (key.native_event()) {
-    XKeyEvent* x_key = reinterpret_cast<XKeyEvent*>(key.native_event());
-    // Yes, ibus uses X11 keysym. We cannot use XLookupKeysym(), which doesn't
-    // translate Shift and CapsLock states.
-    KeySym keysym = NoSymbol;
-    ::XLookupString(x_key, NULL, 0, &keysym, NULL);
-    *ibus_keyval = keysym;
-    *ibus_keycode = x_key->keycode;
-  } else {
-    *ibus_keyval = ui::XKeysymForWindowsKeyCode(
-        key.key_code(), key.IsShiftDown() ^ key.IsCapsLockDown());
-    *ibus_keycode = 0;
-  }
-#elif defined(TOOLKIT_USES_GTK)
-  if (key.gdk_event()) {
-    GdkEventKey* gdk_key = reinterpret_cast<GdkEventKey*>(key.gdk_event());
-    *ibus_keyval = gdk_key->keyval;
-    *ibus_keycode = gdk_key->hardware_keycode;
-  } else {
-    *ibus_keyval = ui::GdkKeyCodeForWindowsKeyCode(
-        key.key_code(), key.IsShiftDown() ^ key.IsCapsLockDown());
-    *ibus_keycode = 0;
-  }
-#endif
-
-  *ibus_state = IBusStateFromEventFlags(key.flags());
-  if (key.type() == ui::ET_KEY_RELEASED)
-    *ibus_state |= IBUS_RELEASE_MASK;
-}
-
-void ExtractCompositionTextFromIBusPreedit(IBusText* text,
-                                           guint cursor_position,
-                                           ui::CompositionText* composition) {
-  composition->Clear();
-  composition->text = UTF8ToUTF16(text->text);
-
-  if (composition->text.empty())
-    return;
-
-  // ibus uses character index for cursor position and attribute range, but we
-  // use char16 offset for them. So we need to do conversion here.
-  std::vector<size_t> char16_offsets;
-  size_t length = composition->text.length();
-  base::i18n::UTF16CharIterator char_iterator(&composition->text);
-  do {
-    char16_offsets.push_back(char_iterator.array_pos());
-  } while (char_iterator.Advance());
-
-  // The text length in Unicode characters.
-  guint char_length = static_cast<guint>(char16_offsets.size());
-  // Make sure we can convert the value of |char_length| as well.
-  char16_offsets.push_back(length);
-
-  size_t cursor_offset =
-      char16_offsets[std::min(char_length, cursor_position)];
-
-  composition->selection = ui::Range(cursor_offset);
-  if (text->attrs) {
-    guint i = 0;
-    while (true) {
-      IBusAttribute* attr = ibus_attr_list_get(text->attrs, i++);
-      if (!attr)
-        break;
-      if (attr->type != IBUS_ATTR_TYPE_UNDERLINE &&
-          attr->type != IBUS_ATTR_TYPE_BACKGROUND) {
-        continue;
-      }
-      guint start = std::min(char_length, attr->start_index);
-      guint end = std::min(char_length, attr->end_index);
-      if (start >= end)
-        continue;
-      ui::CompositionUnderline underline(
-          char16_offsets[start], char16_offsets[end],
-          SK_ColorBLACK, false /* thick */);
-      if (attr->type == IBUS_ATTR_TYPE_BACKGROUND) {
-        underline.thick = true;
-        // If the cursor is at start or end of this underline, then we treat
-        // it as the selection range as well, but make sure to set the cursor
-        // position to the selection end.
-        if (underline.start_offset == cursor_offset) {
-          composition->selection.set_start(underline.end_offset);
-          composition->selection.set_end(cursor_offset);
-        } else if (underline.end_offset == cursor_offset) {
-          composition->selection.set_start(underline.start_offset);
-          composition->selection.set_end(cursor_offset);
-        }
-      } else if (attr->type == IBUS_ATTR_TYPE_UNDERLINE) {
-        if (attr->value == IBUS_ATTR_UNDERLINE_DOUBLE)
-          underline.thick = true;
-        else if (attr->value == IBUS_ATTR_UNDERLINE_ERROR)
-          underline.color = SK_ColorRED;
-      }
-      composition->underlines.push_back(underline);
-    }
-  }
-
-  // Use a black thin underline by default.
-  if (composition->underlines.empty()) {
-    composition->underlines.push_back(ui::CompositionUnderline(
-        0, length, SK_ColorBLACK, false /* thick */));
-  }
-}
-
-// A switch to enable InputMethodIBus
-const char kEnableInputMethodIBusSwitch[] = "enable-inputmethod-ibus";
-
-}  // namespace
-
-namespace views {
-
-// InputMethodIBus::PendingKeyEvent implementation ----------------------------
-class InputMethodIBus::PendingKeyEvent {
- public:
-  PendingKeyEvent(InputMethodIBus* input_method, const KeyEvent& key,
-                  guint32 ibus_keyval);
-  ~PendingKeyEvent();
-
-  // Abandon this pending key event. Its result will just be discarded.
-  void abandon() { input_method_ = NULL; }
-
-  InputMethodIBus* input_method() const { return input_method_; }
-
-  // Process this pending key event after we receive its result from the input
-  // method. It just call through InputMethodIBus::ProcessKeyEventPostIME().
-  void ProcessPostIME(bool handled);
-
- private:
-  InputMethodIBus* input_method_;
-
-  // Complete information of a views::KeyEvent. Sadly, views::KeyEvent doesn't
-  // support copy.
-  ui::EventType type_;
-  int flags_;
-  ui::KeyboardCode key_code_;
-  uint16 character_;
-  uint16 unmodified_character_;
-
-  guint32 ibus_keyval_;
-
-#if defined(TOUCH_UI)
-  // corresponding XEvent data of a views::KeyEvent. It's a plain struct so we
-  // can do bitwise copy.
-  XKeyEvent x_event_;
-#endif
-
-  DISALLOW_COPY_AND_ASSIGN(PendingKeyEvent);
-};
-
-InputMethodIBus::PendingKeyEvent::PendingKeyEvent(InputMethodIBus* input_method,
-                                                  const KeyEvent& key,
-                                                  guint32 ibus_keyval)
-    : input_method_(input_method),
-      type_(key.type()),
-      flags_(key.flags()),
-      key_code_(key.key_code()),
-      character_(key.GetCharacter()),
-      unmodified_character_(key.GetUnmodifiedCharacter()),
-      ibus_keyval_(ibus_keyval) {
-  DCHECK(input_method_);
-
-#if defined(TOUCH_UI)
-  if (key.native_event())
-    x_event_ = *reinterpret_cast<XKeyEvent*>(key.native_event());
-  else
-    memset(&x_event_, 0, sizeof(x_event_));
-#endif
-}
-
-InputMethodIBus::PendingKeyEvent::~PendingKeyEvent() {
-  if (input_method_)
-    input_method_->FinishPendingKeyEvent(this);
-}
-
-void InputMethodIBus::PendingKeyEvent::ProcessPostIME(bool handled) {
-  if (!input_method_)
-    return;
-
-#if defined(TOUCH_UI)
-  if (x_event_.type == KeyPress || x_event_.type == KeyRelease) {
-    KeyEvent key(reinterpret_cast<XEvent*>(&x_event_));
-    input_method_->ProcessKeyEventPostIME(key, ibus_keyval_, handled);
-    return;
-  }
-#endif
-  KeyEvent key(type_, key_code_, flags_);
-  if (key_code_ == ui::VKEY_UNKNOWN) {
-    key.set_character(character_);
-    key.set_unmodified_character(unmodified_character_);
-  }
-  input_method_->ProcessKeyEventPostIME(key, ibus_keyval_, handled);
-}
-
-// InputMethodIBus::PendingCreateICRequest implementation ---------------------
-class InputMethodIBus::PendingCreateICRequest {
- public:
-  PendingCreateICRequest(InputMethodIBus* input_method,
-                         PendingCreateICRequest** request_ptr);
-  ~PendingCreateICRequest();
-
-  // Abandon this pending key event. Its result will just be discarded.
-  void abandon() {
-    input_method_ = NULL;
-    request_ptr_ = NULL;
-  }
-
-  // Stores the result input context to |input_method_|, or abandon it if
-  // |input_method_| is NULL.
-  void StoreOrAbandonInputContext(IBusInputContext* ic);
-
- private:
-  InputMethodIBus* input_method_;
-  PendingCreateICRequest** request_ptr_;
-};
-
-InputMethodIBus::PendingCreateICRequest::PendingCreateICRequest(
-    InputMethodIBus* input_method,
-    PendingCreateICRequest** request_ptr)
-    : input_method_(input_method),
-      request_ptr_(request_ptr) {
-}
-
-InputMethodIBus::PendingCreateICRequest::~PendingCreateICRequest() {
-  if (request_ptr_) {
-    DCHECK_EQ(*request_ptr_, this);
-    *request_ptr_ = NULL;
-  }
-}
-
-void InputMethodIBus::PendingCreateICRequest::StoreOrAbandonInputContext(
-    IBusInputContext* ic) {
-  if (input_method_) {
-    input_method_->SetContext(ic);
-  } else {
-    // ibus_proxy_destroy() will not really release the object, we still need
-    // to call g_object_unref() explicitly.
-    ibus_proxy_destroy(reinterpret_cast<IBusProxy *>(ic));
-    g_object_unref(ic);
-  }
-}
-
-// InputMethodIBus implementation ---------------------------------------------
-InputMethodIBus::InputMethodIBus(internal::InputMethodDelegate* delegate)
-    : context_(NULL),
-      pending_create_ic_request_(NULL),
-      context_focused_(false),
-      composing_text_(false),
-      composition_changed_(false),
-      suppress_next_result_(false) {
-  set_delegate(delegate);
-}
-
-InputMethodIBus::~InputMethodIBus() {
-  AbandonAllPendingKeyEvents();
-  DestroyContext();
-
-  // Disconnect bus signals
-  g_signal_handlers_disconnect_by_func(
-      GetIBus(), reinterpret_cast<gpointer>(OnIBusConnectedThunk), this);
-  g_signal_handlers_disconnect_by_func(
-      GetIBus(), reinterpret_cast<gpointer>(OnIBusDisconnectedThunk), this);
-}
-
-void InputMethodIBus::OnFocus() {
-  DCHECK(!widget_focused());
-  InputMethodBase::OnFocus();
-  UpdateContextFocusState();
-}
-
-void InputMethodIBus::OnBlur() {
-  DCHECK(widget_focused());
-  ConfirmCompositionText();
-  InputMethodBase::OnBlur();
-  UpdateContextFocusState();
-}
-
-void InputMethodIBus::Init(Widget* widget) {
-  // Initializes the connection to ibus daemon. It may happen asynchronously,
-  // and as soon as the connection is established, the |context_| will be
-  // created automatically.
-  IBusBus* bus = GetIBus();
-
-  // connect bus signals
-  g_signal_connect(bus, "connected",
-                   G_CALLBACK(OnIBusConnectedThunk), this);
-  g_signal_connect(bus, "disconnected",
-                   G_CALLBACK(OnIBusDisconnectedThunk), this);
-
-  // Creates the |context_| if the connection is already established. In such
-  // case, we will not get "connected" signal.
-  if (ibus_bus_is_connected(bus))
-    CreateContext();
-
-  InputMethodBase::Init(widget);
-}
-
-void InputMethodIBus::DispatchKeyEvent(const KeyEvent& key) {
-  DCHECK(key.type() == ui::ET_KEY_PRESSED || key.type() == ui::ET_KEY_RELEASED);
-  DCHECK(widget_focused());
-
-  guint32 ibus_keyval = 0;
-  guint32 ibus_keycode = 0;
-  guint32 ibus_state = 0;
-  IBusKeyEventFromViewsKeyEvent(key, &ibus_keyval, &ibus_keycode, &ibus_state);
-
-  // If |context_| is not usable, then we can only dispatch the key event as is.
-  // We also dispatch the key event directly if the current text input type is
-  // ui::TEXT_INPUT_TYPE_PASSWORD, to bypass the input method.
-  // Note: We need to send the key event to ibus even if the |context_| is not
-  // enabled, so that ibus can have a chance to enable the |context_|.
-  if (!context_focused_ ||
-      GetTextInputType() == ui::TEXT_INPUT_TYPE_PASSWORD) {
-    if (key.type() == ui::ET_KEY_PRESSED)
-      ProcessUnfilteredKeyPressEvent(key, ibus_keyval);
-    else
-      DispatchKeyEventPostIME(key);
-    return;
-  }
-
-  PendingKeyEvent* pending_key = new PendingKeyEvent(this, key, ibus_keyval);
-  pending_key_events_.insert(pending_key);
-
-  // Note:
-  // 1. We currently set timeout to -1, because ibus doesn't have a mechanism to
-  // associate input method results to corresponding key event, thus there is
-  // actually no way to abandon results generated by a specific key event. So we
-  // actually cannot abandon a specific key event and its result but accept
-  // following key events and their results. So a timeout to abandon a key event
-  // will not work.
-  // 2. We set GCancellable to NULL, because the operation of cancelling a async
-  // request also happens asynchronously, thus it's actually useless to us.
-  //
-  // The fundemental problem of ibus' async API is: it uses Glib's GIO API to
-  // realize async communication, but in fact, GIO API is specially designed for
-  // concurrent tasks, though it supports async communication as well, the API
-  // is much more complicated than an ordinary message based async communication
-  // API (such as Chrome's IPC).
-  // Thus it's very complicated, if not impossible, to implement a client that
-  // fully utilize asynchronous communication without potential problem.
-  ibus_input_context_process_key_event_async(
-      context_,
-      ibus_keyval, ibus_keycode, ibus_state, -1, NULL,
-      reinterpret_cast<GAsyncReadyCallback>(ProcessKeyEventDone),
-      pending_key);
-
-  // We don't want to suppress the result generated by this key event, but it
-  // may cause problem. See comment in ResetContext() method.
-  suppress_next_result_ = false;
-}
-
-void InputMethodIBus::OnTextInputTypeChanged(View* view) {
-  if (context_ && IsViewFocused(view)) {
-    ResetContext();
-    UpdateContextFocusState();
-  }
-  InputMethodBase::OnTextInputTypeChanged(view);
-}
-
-void InputMethodIBus::OnCaretBoundsChanged(View* view) {
-  if (!context_focused_ || !IsViewFocused(view))
-    return;
-
-  // The current text input type should not be NONE if |context_| is focused.
-  DCHECK(!IsTextInputTypeNone());
-
-  gfx::Rect rect = GetTextInputClient()->GetCaretBounds();
-  gfx::Point origin = rect.origin();
-  gfx::Point end = gfx::Point(rect.right(), rect.bottom());
-
-  // We need to convert the origin and end points separately, in case the View
-  // is scaled.
-  View::ConvertPointToScreen(view, &origin);
-  View::ConvertPointToScreen(view, &end);
-
-  // This function runs asynchronously.
-  ibus_input_context_set_cursor_location(
-      context_, origin.x(), origin.y(),
-      end.x() - origin.x(), end.y() - origin.y());
-}
-
-void InputMethodIBus::CancelComposition(View* view) {
-  if (context_focused_ && IsViewFocused(view))
-    ResetContext();
-}
-
-std::string InputMethodIBus::GetInputLocale() {
-  // Not supported.
-  return std::string("");
-}
-
-base::i18n::TextDirection InputMethodIBus::GetInputTextDirection() {
-  // Not supported.
-  return base::i18n::UNKNOWN_DIRECTION;
-}
-
-bool InputMethodIBus::IsActive() {
-  return true;
-}
-
-// static
-bool InputMethodIBus::IsInputMethodIBusEnabled() {
-#if defined(TOUCH_UI)
-  return true;
-#else
-  return inputmethod_ibus_enabled ||
-      CommandLine::ForCurrentProcess()->HasSwitch(
-          kEnableInputMethodIBusSwitch);
-#endif
-}
-
-// static
-void InputMethodIBus::SetEnableInputMethodIBus(bool enabled) {
-  inputmethod_ibus_enabled = enabled;
-}
-
-void InputMethodIBus::OnWillChangeFocus(View* focused_before, View* focused) {
-  ConfirmCompositionText();
-}
-
-void InputMethodIBus::OnDidChangeFocus(View* focused_before, View* focused) {
-  UpdateContextFocusState();
-
-  // Force to update caret bounds, in case the View thinks that the caret
-  // bounds has not changed.
-  if (context_focused_)
-    OnCaretBoundsChanged(GetFocusedView());
-}
-
-void InputMethodIBus::CreateContext() {
-  DCHECK(!context_);
-  DCHECK(GetIBus());
-  DCHECK(ibus_bus_is_connected(GetIBus()));
-  DCHECK(!pending_create_ic_request_);
-
-  // Creates the input context asynchronously.
-  pending_create_ic_request_ = new PendingCreateICRequest(
-      this, &pending_create_ic_request_);
-  ibus_bus_create_input_context_async(
-      GetIBus(), "chrome", -1, NULL,
-      reinterpret_cast<GAsyncReadyCallback>(CreateInputContextDone),
-      pending_create_ic_request_);
-}
-
-void InputMethodIBus::SetContext(IBusInputContext* ic) {
-  DCHECK(ic);
-  DCHECK(!context_);
-  context_ = ic;
-
-  // connect input context signals
-  g_signal_connect(ic, "commit-text",
-                   G_CALLBACK(OnCommitTextThunk), this);
-  g_signal_connect(ic, "forward-key-event",
-                   G_CALLBACK(OnForwardKeyEventThunk), this);
-  g_signal_connect(ic, "update-preedit-text",
-                   G_CALLBACK(OnUpdatePreeditTextThunk), this);
-  g_signal_connect(ic, "show-preedit-text",
-                   G_CALLBACK(OnShowPreeditTextThunk), this);
-  g_signal_connect(ic, "hide-preedit-text",
-                   G_CALLBACK(OnHidePreeditTextThunk), this);
-  g_signal_connect(ic, "destroy",
-                   G_CALLBACK(OnDestroyThunk), this);
-
-  // TODO(suzhe): support surrounding text.
-  guint32 caps = IBUS_CAP_PREEDIT_TEXT | IBUS_CAP_FOCUS;
-  ibus_input_context_set_capabilities(ic, caps);
-
-  UpdateContextFocusState();
-  OnInputMethodChanged();
-}
-
-void InputMethodIBus::DestroyContext() {
-  if (pending_create_ic_request_) {
-    DCHECK(!context_);
-    // |pending_create_ic_request_| will be deleted in CreateInputContextDone().
-    pending_create_ic_request_->abandon();
-    pending_create_ic_request_ = NULL;
-  } else if (context_) {
-    // ibus_proxy_destroy() will not really release the resource of |context_|
-    // object. We still need to handle "destroy" signal and call
-    // g_object_unref() there.
-    ibus_proxy_destroy(reinterpret_cast<IBusProxy *>(context_));
-    DCHECK(!context_);
-  }
-}
-
-void InputMethodIBus::ConfirmCompositionText() {
-  ui::TextInputClient* client = GetTextInputClient();
-  if (client && client->HasCompositionText())
-    client->ConfirmCompositionText();
-
-  ResetContext();
-}
-
-void InputMethodIBus::ResetContext() {
-  if (!context_focused_ || !GetTextInputClient())
-    return;
-
-  DCHECK(widget_focused());
-  DCHECK(GetFocusedView());
-
-  // Because ibus runs in asynchronous mode, the input method may still send us
-  // results after sending out the reset request, so we use a flag to discard
-  // all results generated by previous key events. But because ibus does not
-  // have a mechanism to identify each key event and corresponding results, this
-  // approach will not work for some corner cases. For example if the user types
-  // very fast, then the next key event may come in before the |context_| is
-  // really reset. Then we actually cannot know whether or not the next
-  // result should be discard.
-  suppress_next_result_ = true;
-
-  composition_.Clear();
-  result_text_.clear();
-  composing_text_ = false;
-  composition_changed_ = false;
-
-  // We need to abandon all pending key events, but as above comment says, there
-  // is no reliable way to abandon all results generated by these abandoned key
-  // events.
-  AbandonAllPendingKeyEvents();
-
-  // This function runs asynchronously.
-  // Note: some input method engines may not support reset method, such as
-  // ibus-anthy. But as we control all input method engines by ourselves, we can
-  // make sure that all of the engines we are using support it correctly.
-  ibus_input_context_reset(context_);
-
-  character_composer_.Reset();
-}
-
-void InputMethodIBus::UpdateContextFocusState() {
-  if (!context_) {
-    context_focused_ = false;
-    return;
-  }
-
-  const bool old_context_focused = context_focused_;
-  // Use switch here in case we are going to add more text input types.
-  switch (GetTextInputType()) {
-    case ui::TEXT_INPUT_TYPE_NONE:
-    case ui::TEXT_INPUT_TYPE_PASSWORD:
-      context_focused_ = false;
-      break;
-    default:
-      context_focused_ = true;
-      break;
-  }
-
-  // We only focus in |context_| when the focus is in a normal textfield.
-  // ibus_input_context_focus_{in|out}() run asynchronously.
-  if (old_context_focused && !context_focused_)
-    ibus_input_context_focus_out(context_);
-  else if (!old_context_focused && context_focused_)
-    ibus_input_context_focus_in(context_);
-}
-
-void InputMethodIBus::ProcessKeyEventPostIME(const KeyEvent& key,
-                                             guint32 ibus_keyval,
-                                             bool handled) {
-  // If we get here without a focused text input client, then it means the key
-  // event is sent to the global ibus input context.
-  if (!GetTextInputClient()) {
-    DispatchKeyEventPostIME(key);
-    return;
-  }
-
-  const View* old_focused_view = GetFocusedView();
-
-  // Same reason as above DCHECK.
-  DCHECK(old_focused_view);
-
-  if (key.type() == ui::ET_KEY_PRESSED && handled)
-    ProcessFilteredKeyPressEvent(key);
-
-  // In case the focus was changed by the key event. The |context_| should have
-  // been reset when the focused view changed.
-  if (old_focused_view != GetFocusedView())
-    return;
-
-  if (HasInputMethodResult())
-    ProcessInputMethodResult(key, handled);
-
-  // In case the focus was changed when sending input method results to the
-  // focused View.
-  if (old_focused_view != GetFocusedView())
-    return;
-
-  if (key.type() == ui::ET_KEY_PRESSED && !handled)
-    ProcessUnfilteredKeyPressEvent(key, ibus_keyval);
-  else if (key.type() == ui::ET_KEY_RELEASED)
-    DispatchKeyEventPostIME(key);
-}
-
-void InputMethodIBus::ProcessFilteredKeyPressEvent(const KeyEvent& key) {
-  if (NeedInsertChar()) {
-    DispatchKeyEventPostIME(key);
-  } else {
-    KeyEvent key(ui::ET_KEY_PRESSED, ui::VKEY_PROCESSKEY, key.flags());
-    DispatchKeyEventPostIME(key);
-  }
-}
-
-void InputMethodIBus::ProcessUnfilteredKeyPressEvent(const KeyEvent& key,
-                                                     guint32 ibus_keyval) {
-  const View* old_focused_view = GetFocusedView();
-  DispatchKeyEventPostIME(key);
-
-  // We shouldn't dispatch the character anymore if the key event caused focus
-  // change.
-  if (old_focused_view != GetFocusedView())
-    return;
-
-  // Process compose and dead keys
-  if (character_composer_.FilterKeyPress(ibus_keyval)) {
-    string16 composed = character_composer_.composed_character();
-    if (!composed.empty()) {
-      ui::TextInputClient* client = GetTextInputClient();
-      if (client)
-        client->InsertText(composed);
-    }
-    return;
-  }
-  // If a key event was not filtered by |context_| and |character_composer_|,
-  // then it means the key event didn't generate any result text. So we need
-  // to send corresponding character to the focused text input client.
-
-  ui::TextInputClient* client = GetTextInputClient();
-  char16 ch = key.GetCharacter();
-  if (ch && client)
-    client->InsertChar(ch, key.flags());
-}
-
-void InputMethodIBus::ProcessInputMethodResult(const KeyEvent& key,
-                                               bool handled) {
-  ui::TextInputClient* client = GetTextInputClient();
-  DCHECK(client);
-
-  if (result_text_.length()) {
-    if (handled && NeedInsertChar()) {
-      for (string16::const_iterator i = result_text_.begin();
-           i != result_text_.end(); ++i) {
-        client->InsertChar(*i, key.flags());
-      }
-    } else {
-      client->InsertText(result_text_);
-      composing_text_ = false;
-    }
-  }
-
-  if (composition_changed_ && !IsTextInputTypeNone()) {
-    if (composition_.text.length()) {
-      composing_text_ = true;
-      client->SetCompositionText(composition_);
-    } else if (result_text_.empty()) {
-      client->ClearCompositionText();
-    }
-  }
-
-  // We should not clear composition text here, as it may belong to the next
-  // composition session.
-  result_text_.clear();
-  composition_changed_ = false;
-}
-
-bool InputMethodIBus::NeedInsertChar() const {
-  return GetTextInputClient() &&
-      (IsTextInputTypeNone() ||
-       (!composing_text_ && result_text_.length() == 1));
-}
-
-bool InputMethodIBus::HasInputMethodResult() const {
-  return result_text_.length() || composition_changed_;
-}
-
-void InputMethodIBus::SendFakeProcessKeyEvent(bool pressed) const {
-  KeyEvent key(pressed ? ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED,
-               ui::VKEY_PROCESSKEY, 0);
-  DispatchKeyEventPostIME(key);
-}
-
-void InputMethodIBus::FinishPendingKeyEvent(PendingKeyEvent* pending_key) {
-  DCHECK(pending_key_events_.count(pending_key));
-
-  // |pending_key| will be deleted in ProcessKeyEventDone().
-  pending_key_events_.erase(pending_key);
-}
-
-void InputMethodIBus::AbandonAllPendingKeyEvents() {
-  for (std::set<PendingKeyEvent*>::iterator i = pending_key_events_.begin();
-       i != pending_key_events_.end(); ++i) {
-    // The object will be deleted in ProcessKeyEventDone().
-    (*i)->abandon();
-  }
-  pending_key_events_.clear();
-}
-
-void InputMethodIBus::OnCommitText(IBusInputContext* context, IBusText* text) {
-  DCHECK_EQ(context_, context);
-  if (suppress_next_result_ || !text || !text->text)
-    return;
-
-  // We need to receive input method result even if the text input type is
-  // ui::TEXT_INPUT_TYPE_NONE, to make sure we can always send correct
-  // character for each key event to the focused text input client.
-  if (!GetTextInputClient())
-    return;
-
-  string16 utf16_text(UTF8ToUTF16(text->text));
-
-  // Append the text to the buffer, because commit signal might be fired
-  // multiple times when processing a key event.
-  result_text_.append(utf16_text);
-
-  // If we are not handling key event, do not bother sending text result if the
-  // focused text input client does not support text input.
-  if (pending_key_events_.empty() && !IsTextInputTypeNone()) {
-    SendFakeProcessKeyEvent(true);
-    GetTextInputClient()->InsertText(utf16_text);
-    SendFakeProcessKeyEvent(false);
-    result_text_.clear();
-  }
-}
-
-void InputMethodIBus::OnForwardKeyEvent(IBusInputContext* context,
-                                        guint keyval,
-                                        guint keycode,
-                                        guint state) {
-  DCHECK_EQ(context_, context);
-
-  ui::KeyboardCode key_code = ui::VKEY_UNKNOWN;
-#if defined(USE_AURA)
-  key_code = ui::KeyboardCodeFromXKeysym(keyval);
-#elif defined(TOOLKIT_USES_GTK)
-  key_code = ui::WindowsKeyCodeForGdkKeyCode(keyval);
-#endif
-
-  if (!key_code)
-    return;
-
-  KeyEvent key(state & IBUS_RELEASE_MASK ?
-               ui::ET_KEY_RELEASED : ui::ET_KEY_PRESSED,
-               key_code, EventFlagsFromIBusState(state));
-
-  // It is not clear when the input method will forward us a fake key event.
-  // If there is a pending key event, then we may already received some input
-  // method results, so we dispatch this fake key event directly rather than
-  // calling ProcessKeyEventPostIME(), which will clear pending input method
-  // results.
-  if (key.type() == ui::ET_KEY_PRESSED)
-    ProcessUnfilteredKeyPressEvent(key, keyval);
-  else
-    DispatchKeyEventPostIME(key);
-}
-
-void InputMethodIBus::OnShowPreeditText(IBusInputContext* context) {
-  DCHECK_EQ(context_, context);
-  if (suppress_next_result_ || IsTextInputTypeNone())
-    return;
-
-  composing_text_ = true;
-}
-
-void InputMethodIBus::OnUpdatePreeditText(IBusInputContext* context,
-                                          IBusText* text,
-                                          guint cursor_pos,
-                                          gboolean visible) {
-  DCHECK_EQ(context_, context);
-  if (suppress_next_result_ || IsTextInputTypeNone())
-    return;
-
-  // |visible| argument is very confusing. For example, what's the correct
-  // behavior when:
-  // 1. OnUpdatePreeditText() is called with a text and visible == false, then
-  // 2. OnShowPreeditText() is called afterwards.
-  //
-  // If it's only for clearing the current preedit text, then why not just use
-  // OnHidePreeditText()?
-  if (!visible) {
-    OnHidePreeditText(context);
-    return;
-  }
-
-  ExtractCompositionTextFromIBusPreedit(text, cursor_pos, &composition_);
-
-  composition_changed_ = true;
-
-  // In case OnShowPreeditText() is not called.
-  if (composition_.text.length())
-    composing_text_ = true;
-
-  // If we receive a composition text without pending key event, then we need to
-  // send it to the focused text input client directly.
-  if (pending_key_events_.empty()) {
-    SendFakeProcessKeyEvent(true);
-    GetTextInputClient()->SetCompositionText(composition_);
-    SendFakeProcessKeyEvent(false);
-    composition_changed_ = false;
-    composition_.Clear();
-  }
-}
-
-void InputMethodIBus::OnHidePreeditText(IBusInputContext* context) {
-  DCHECK_EQ(context_, context);
-  if (composition_.text.empty() || IsTextInputTypeNone())
-    return;
-
-  // Intentionally leaves |composing_text_| unchanged.
-  composition_changed_ = true;
-  composition_.Clear();
-
-  if (pending_key_events_.empty()) {
-    ui::TextInputClient* client = GetTextInputClient();
-    if (client && client->HasCompositionText())
-      client->ClearCompositionText();
-    composition_changed_ = false;
-  }
-}
-
-void InputMethodIBus::OnDestroy(IBusInputContext* context) {
-  DCHECK_EQ(context_, context);
-  g_object_unref(context_);
-  context_ = NULL;
-  context_focused_ = false;
-
-  ConfirmCompositionText();
-
-  // We are dead, so we need to ask the client to stop relying on us.
-  // We cannot do it in DestroyContext(), because OnDestroy() may be called
-  // automatically.
-  OnInputMethodChanged();
-}
-
-void InputMethodIBus::OnIBusConnected(IBusBus* bus) {
-  DCHECK_EQ(GetIBus(), bus);
-  DCHECK(ibus_bus_is_connected(bus));
-
-  DestroyContext();
-  CreateContext();
-}
-
-void InputMethodIBus::OnIBusDisconnected(IBusBus* bus) {
-  DCHECK_EQ(GetIBus(), bus);
-
-  // TODO(suzhe): Make sure if we really do not need to handle this signal.
-  // And I'm actually wondering if ibus-daemon will release the resource of the
-  // |context_| correctly when the connection is lost.
-}
-
-// static
-IBusBus* InputMethodIBus::GetIBus() {
-  // Everything happens in UI thread, so we do not need to care about
-  // synchronization issue.
-  static IBusBus* ibus = NULL;
-
-  if (!ibus) {
-    ibus_init();
-    ibus = ibus_bus_new();
-    DCHECK(ibus);
-  }
-  return ibus;
-}
-
-// static
-void InputMethodIBus::ProcessKeyEventDone(IBusInputContext* context,
-                                          GAsyncResult* res,
-                                          PendingKeyEvent* data) {
-  DCHECK(data);
-  DCHECK(!data->input_method() ||
-         data->input_method()->context_ == context);
-
-  gboolean handled = ibus_input_context_process_key_event_async_finish(
-      context, res, NULL);
-  data->ProcessPostIME(handled);
-  delete data;
-}
-
-// static
-void InputMethodIBus::CreateInputContextDone(IBusBus* bus,
-                                             GAsyncResult* res,
-                                             PendingCreateICRequest* data) {
-  DCHECK_EQ(GetIBus(), bus);
-  DCHECK(data);
-  IBusInputContext* ic =
-      ibus_bus_create_input_context_async_finish(bus, res, NULL);
-  if (ic)
-    data->StoreOrAbandonInputContext(ic);
-  delete data;
-}
-
-}  // namespace views