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Unified Diff: views/ime/input_method_ibus.cc

Issue 8581003: views: Move ime and test directories to ui/views. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: fix linux Created 9 years, 1 month ago
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Index: views/ime/input_method_ibus.cc
diff --git a/views/ime/input_method_ibus.cc b/views/ime/input_method_ibus.cc
deleted file mode 100644
index 8291e6ab5fb0f487e8d54cff44e9aa77630d7549..0000000000000000000000000000000000000000
--- a/views/ime/input_method_ibus.cc
+++ /dev/null
@@ -1,961 +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.
-
-#include "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/command_line.h"
-#include "base/basictypes.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 "views/events/event.h"
-#include "views/widget/widget.h"
-
-#if defined(USE_AURA) || defined(TOUCH_UI)
-#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_BUTTON_DOWN : 0) |
- (state & IBUS_BUTTON2_MASK ? ui::EF_MIDDLE_BUTTON_DOWN : 0) |
- (state & IBUS_BUTTON3_MASK ? ui::EF_RIGHT_BUTTON_DOWN : 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_BUTTON_DOWN ? IBUS_BUTTON1_MASK : 0) |
- (flags & ui::EF_MIDDLE_BUTTON_DOWN ? IBUS_BUTTON2_MASK : 0) |
- (flags & ui::EF_RIGHT_BUTTON_DOWN ? 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) || defined(TOUCH_UI)
- 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
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