| // 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. |
| |
| #include "content/browser/renderer_host/gtk_im_context_wrapper.h" |
| |
| #include <gdk/gdk.h> |
| #include <gdk/gdkkeysyms.h> |
| #include <gtk/gtk.h> |
| |
| #include <algorithm> |
| |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "content/browser/renderer_host/render_widget_host_impl.h" |
| #include "content/browser/renderer_host/render_widget_host_view_gtk.h" |
| #include "content/public/browser/native_web_keyboard_event.h" |
| #include "third_party/WebKit/public/web/WebCompositionUnderline.h" |
| #include "ui/base/gtk/gtk_im_context_util.h" |
| #include "ui/gfx/gtk_util.h" |
| #include "ui/gfx/rect.h" |
| |
| namespace content { |
| namespace { |
| |
| // Copied from third_party/WebKit/Source/WebCore/page/EventHandler.cpp |
| // |
| // Match key code of composition keydown event on windows. |
| // IE sends VK_PROCESSKEY which has value 229; |
| // |
| // Please refer to following documents for detals: |
| // - Virtual-Key Codes |
| // http://msdn.microsoft.com/en-us/library/ms645540(VS.85).aspx |
| // - How the IME System Works |
| // http://msdn.microsoft.com/en-us/library/cc194848.aspx |
| // - ImmGetVirtualKey Function |
| // http://msdn.microsoft.com/en-us/library/dd318570(VS.85).aspx |
| const int kCompositionEventKeyCode = 229; |
| |
| } // namespace |
| |
| // ui::CompositionUnderline should be identical to |
| // WebKit::WebCompositionUnderline, so that we can do reinterpret_cast safely. |
| // TODO(suzhe): remove it after migrating all code in chrome to use |
| // ui::CompositionUnderline. |
| COMPILE_ASSERT(sizeof(ui::CompositionUnderline) == |
| sizeof(WebKit::WebCompositionUnderline), |
| ui_CompositionUnderline__WebKit_WebCompositionUnderline_diff); |
| |
| GtkIMContextWrapper::GtkIMContextWrapper(RenderWidgetHostViewGtk* host_view) |
| : host_view_(host_view), |
| context_(gtk_im_multicontext_new()), |
| context_simple_(gtk_im_context_simple_new()), |
| is_focused_(false), |
| is_composing_text_(false), |
| is_enabled_(false), |
| is_in_key_event_handler_(false), |
| is_composition_changed_(false), |
| suppress_next_commit_(false), |
| last_key_code_(0), |
| last_key_was_up_(false), |
| last_key_filtered_no_result_(false) { |
| DCHECK(context_); |
| DCHECK(context_simple_); |
| |
| // context_ and context_simple_ share the same callback handlers. |
| // All data come from them are treated equally. |
| // context_ is for full input method support. |
| // context_simple_ is for supporting dead/compose keys when input method is |
| // disabled by webkit, eg. in password input box. |
| g_signal_connect(context_, "preedit-start", |
| G_CALLBACK(HandlePreeditStartThunk), this); |
| g_signal_connect(context_, "preedit-end", |
| G_CALLBACK(HandlePreeditEndThunk), this); |
| g_signal_connect(context_, "preedit-changed", |
| G_CALLBACK(HandlePreeditChangedThunk), this); |
| g_signal_connect(context_, "commit", |
| G_CALLBACK(HandleCommitThunk), this); |
| g_signal_connect(context_, "retrieve-surrounding", |
| G_CALLBACK(HandleRetrieveSurroundingThunk), this); |
| |
| g_signal_connect(context_simple_, "preedit-start", |
| G_CALLBACK(HandlePreeditStartThunk), this); |
| g_signal_connect(context_simple_, "preedit-end", |
| G_CALLBACK(HandlePreeditEndThunk), this); |
| g_signal_connect(context_simple_, "preedit-changed", |
| G_CALLBACK(HandlePreeditChangedThunk), this); |
| g_signal_connect(context_simple_, "commit", |
| G_CALLBACK(HandleCommitThunk), this); |
| g_signal_connect(context_simple_, "retrieve-surrounding", |
| G_CALLBACK(HandleRetrieveSurroundingThunk), this); |
| |
| GtkWidget* widget = host_view->GetNativeView(); |
| DCHECK(widget); |
| |
| g_signal_connect(widget, "realize", |
| G_CALLBACK(HandleHostViewRealizeThunk), this); |
| g_signal_connect(widget, "unrealize", |
| G_CALLBACK(HandleHostViewUnrealizeThunk), this); |
| |
| // Set client window if the widget is already realized. |
| HandleHostViewRealize(widget); |
| } |
| |
| GtkIMContextWrapper::~GtkIMContextWrapper() { |
| if (context_) |
| g_object_unref(context_); |
| if (context_simple_) |
| g_object_unref(context_simple_); |
| } |
| |
| void GtkIMContextWrapper::ProcessKeyEvent(GdkEventKey* event) { |
| suppress_next_commit_ = false; |
| |
| // Indicates preedit-changed and commit signal handlers that we are |
| // processing a key event. |
| is_in_key_event_handler_ = true; |
| // Reset this flag so that we can know if preedit is changed after |
| // processing this key event. |
| is_composition_changed_ = false; |
| // Clear it so that we can know if something needs committing after |
| // processing this key event. |
| commit_text_.clear(); |
| |
| // According to Document Object Model (DOM) Level 3 Events Specification |
| // Appendix A: Keyboard events and key identifiers |
| // http://www.w3.org/TR/DOM-Level-3-Events/keyset.html: |
| // The event sequence would be: |
| // 1. keydown |
| // 2. textInput |
| // 3. keyup |
| // |
| // So keydown must be sent to webkit before sending input method result, |
| // while keyup must be sent afterwards. |
| // However on Windows, if a keydown event has been processed by IME, its |
| // virtual keycode will be changed to VK_PROCESSKEY(0xE5) before being sent |
| // to application. |
| // To emulate the windows behavior as much as possible, we need to send the |
| // key event to the GtkIMContext object first, and decide whether or not to |
| // send the original key event to webkit according to the result from IME. |
| // |
| // If IME is enabled by WebKit, this event will be dispatched to context_ |
| // to get full IME support. Otherwise it'll be dispatched to |
| // context_simple_, so that dead/compose keys can still work. |
| // |
| // It sends a "commit" signal when it has a character to be inserted |
| // even when we use a US keyboard so that we can send a Char event |
| // (or an IME event) to the renderer in our "commit"-signal handler. |
| // We should send a KeyDown (or a KeyUp) event before dispatching this |
| // event to the GtkIMContext object (and send a Char event) so that WebKit |
| // can dispatch the JavaScript events in the following order: onkeydown(), |
| // onkeypress(), and onkeyup(). (Many JavaScript pages assume this.) |
| gboolean filtered = false; |
| if (is_enabled_) { |
| filtered = gtk_im_context_filter_keypress(context_, event); |
| } else { |
| filtered = gtk_im_context_filter_keypress(context_simple_, event); |
| } |
| |
| // Reset this flag here, as it's only used in input method callbacks. |
| is_in_key_event_handler_ = false; |
| |
| NativeWebKeyboardEvent wke(reinterpret_cast<GdkEvent*>(event)); |
| |
| // If the key event was handled by the input method, then we need to prevent |
| // RenderView::UnhandledKeyboardEvent() from processing it. |
| // Otherwise unexpected result may occur. For example if it's a |
| // Backspace key event, the browser may go back to previous page. |
| // We just send all keyup events to the browser to avoid breaking the |
| // browser's MENU key function, which is actually the only keyup event |
| // handled in the browser. |
| if (filtered && event->type == GDK_KEY_PRESS) |
| wke.skip_in_browser = true; |
| |
| const int key_code = wke.windowsKeyCode; |
| const bool has_result = HasInputMethodResult(); |
| |
| // Send filtered keydown event before sending IME result. |
| // In order to workaround http://crosbug.com/6582, we only send a filtered |
| // keydown event if it generated any input method result. |
| if (event->type == GDK_KEY_PRESS && filtered && has_result) |
| ProcessFilteredKeyPressEvent(&wke); |
| |
| // Send IME results. In most cases, it's only available if the key event |
| // is filtered by IME. But in rare cases, an unfiltered key event may also |
| // generate IME results. |
| // Any IME results generated by a unfiltered key down event must be sent |
| // before the key down event, to avoid some tricky issues. For example, |
| // when using latin-post input method, pressing 'a' then Backspace, may |
| // generate following events in sequence: |
| // 1. keydown 'a' (filtered) |
| // 2. preedit changed to "a" |
| // 3. keyup 'a' (unfiltered) |
| // 4. keydown Backspace (unfiltered) |
| // 5. commit "a" |
| // 6. preedit end |
| // 7. keyup Backspace (unfiltered) |
| // |
| // In this case, the input box will be in a strange state if keydown |
| // Backspace is sent to webkit before commit "a" and preedit end. |
| if (has_result) |
| ProcessInputMethodResult(event, filtered); |
| |
| // Send unfiltered keydown and keyup events after sending IME result. |
| if (event->type == GDK_KEY_PRESS && !filtered) { |
| ProcessUnfilteredKeyPressEvent(&wke); |
| } else if (event->type == GDK_KEY_RELEASE) { |
| // In order to workaround http://crosbug.com/6582, we need to suppress |
| // the keyup event if corresponding keydown event was suppressed, or |
| // the last key event was a keyup event with the same keycode. |
| const bool suppress = (last_key_code_ == key_code) && |
| (last_key_was_up_ || last_key_filtered_no_result_); |
| |
| if (!suppress) |
| host_view_->ForwardKeyboardEvent(wke); |
| } |
| |
| last_key_code_ = key_code; |
| last_key_was_up_ = (event->type == GDK_KEY_RELEASE); |
| last_key_filtered_no_result_ = (filtered && !has_result); |
| } |
| |
| void GtkIMContextWrapper::UpdateInputMethodState( |
| ui::TextInputType type, |
| bool can_compose_inline) { |
| suppress_next_commit_ = false; |
| |
| // The renderer has updated its IME status. |
| // Control the GtkIMContext object according to this status. |
| if (!context_) |
| return; |
| |
| DCHECK(!is_in_key_event_handler_); |
| |
| bool is_enabled = (type != ui::TEXT_INPUT_TYPE_NONE && |
| type != ui::TEXT_INPUT_TYPE_PASSWORD); |
| if (is_enabled_ != is_enabled) { |
| is_enabled_ = is_enabled; |
| if (is_enabled && is_focused_) |
| gtk_im_context_focus_in(context_); |
| else |
| gtk_im_context_focus_out(context_); |
| } |
| |
| if (is_enabled) { |
| // If the focused element supports inline rendering of composition text, |
| // we receive and send related events to it. Otherwise, the events related |
| // to the updates of composition text are directed to the candidate window. |
| gtk_im_context_set_use_preedit(context_, can_compose_inline); |
| } |
| } |
| |
| void GtkIMContextWrapper::UpdateCaretBounds( |
| const gfx::Rect& caret_bounds) { |
| if (is_enabled_) { |
| // Updates the position of the IME candidate window. |
| // The position sent from the renderer is a relative one, so we need to |
| // attach the GtkIMContext object to this window before changing the |
| // position. |
| GdkRectangle cursor_rect(caret_bounds.ToGdkRectangle()); |
| gtk_im_context_set_cursor_location(context_, &cursor_rect); |
| } |
| } |
| |
| void GtkIMContextWrapper::OnFocusIn() { |
| if (is_focused_) |
| return; |
| |
| // Tracks the focused state so that we can give focus to the |
| // GtkIMContext object correctly later when IME is enabled by WebKit. |
| is_focused_ = true; |
| |
| last_key_code_ = 0; |
| last_key_was_up_ = false; |
| last_key_filtered_no_result_ = false; |
| |
| // Notify the GtkIMContext object of this focus-in event only if IME is |
| // enabled by WebKit. |
| if (is_enabled_) |
| gtk_im_context_focus_in(context_); |
| |
| // context_simple_ is always enabled. |
| // Actually it doesn't care focus state at all. |
| gtk_im_context_focus_in(context_simple_); |
| |
| // Enables RenderWidget's IME related events, so that we can be notified |
| // when WebKit wants to enable or disable IME. |
| if (host_view_->GetRenderWidgetHost()) { |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->SetInputMethodActive(true); |
| } |
| } |
| |
| void GtkIMContextWrapper::OnFocusOut() { |
| if (!is_focused_) |
| return; |
| |
| // Tracks the focused state so that we won't give focus to the |
| // GtkIMContext object unexpectly. |
| is_focused_ = false; |
| |
| // Notify the GtkIMContext object of this focus-out event only if IME is |
| // enabled by WebKit. |
| if (is_enabled_) { |
| // To reset the GtkIMContext object and prevent data loss. |
| ConfirmComposition(); |
| gtk_im_context_focus_out(context_); |
| } |
| |
| // To make sure it'll be in correct state when focused in again. |
| gtk_im_context_reset(context_simple_); |
| gtk_im_context_focus_out(context_simple_); |
| |
| is_composing_text_ = false; |
| |
| // Disable RenderWidget's IME related events to save bandwidth. |
| if (host_view_->GetRenderWidgetHost()) { |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->SetInputMethodActive(false); |
| } |
| } |
| |
| GtkWidget* GtkIMContextWrapper::BuildInputMethodsGtkMenu() { |
| GtkWidget* submenu = gtk_menu_new(); |
| gtk_im_multicontext_append_menuitems(GTK_IM_MULTICONTEXT(context_), |
| GTK_MENU_SHELL(submenu)); |
| return submenu; |
| } |
| |
| void GtkIMContextWrapper::CancelComposition() { |
| if (!is_enabled_) |
| return; |
| |
| DCHECK(!is_in_key_event_handler_); |
| |
| // To prevent any text from being committed when resetting the |context_|; |
| is_in_key_event_handler_ = true; |
| suppress_next_commit_ = true; |
| |
| gtk_im_context_reset(context_); |
| gtk_im_context_reset(context_simple_); |
| |
| if (is_focused_) { |
| // Some input methods may not honour the reset call. Focusing out/in the |
| // |context_| to make sure it gets reset correctly. |
| gtk_im_context_focus_out(context_); |
| gtk_im_context_focus_in(context_); |
| } |
| |
| is_composing_text_ = false; |
| composition_.Clear(); |
| commit_text_.clear(); |
| |
| is_in_key_event_handler_ = false; |
| } |
| |
| bool GtkIMContextWrapper::NeedCommitByForwardingCharEvent() const { |
| // If there is no composition text and has only one character to be |
| // committed, then the character will be send to webkit as a Char event |
| // instead of a confirmed composition text. |
| // It should be fine to handle BMP character only, as non-BMP characters |
| // can always be committed as confirmed composition text. |
| return !is_composing_text_ && commit_text_.length() == 1; |
| } |
| |
| bool GtkIMContextWrapper::HasInputMethodResult() const { |
| return commit_text_.length() || is_composition_changed_; |
| } |
| |
| void GtkIMContextWrapper::ProcessFilteredKeyPressEvent( |
| NativeWebKeyboardEvent* wke) { |
| // If IME has filtered this event, then replace virtual key code with |
| // VK_PROCESSKEY. See comment in ProcessKeyEvent() for details. |
| // It's only required for keydown events. |
| // To emulate windows behavior, when input method is enabled, if the commit |
| // text can be emulated by a Char event, then don't do this replacement. |
| if (!NeedCommitByForwardingCharEvent()) { |
| wke->windowsKeyCode = kCompositionEventKeyCode; |
| // keyidentifier must be updated accordingly, otherwise this key event may |
| // still be processed by webkit. |
| wke->setKeyIdentifierFromWindowsKeyCode(); |
| } |
| host_view_->ForwardKeyboardEvent(*wke); |
| } |
| |
| void GtkIMContextWrapper::ProcessUnfilteredKeyPressEvent( |
| NativeWebKeyboardEvent* wke) { |
| // Send keydown event as it, because it's not filtered by IME. |
| host_view_->ForwardKeyboardEvent(*wke); |
| |
| // IME is disabled by WebKit or the GtkIMContext object cannot handle |
| // this key event. |
| // This case is caused by two reasons: |
| // 1. The given key event is a control-key event, (e.g. return, page up, |
| // page down, tab, arrows, etc.) or; |
| // 2. The given key event is not a control-key event but printable |
| // characters aren't assigned to the event, (e.g. alt+d, etc.) |
| // Create a Char event manually from this key event and send it to the |
| // renderer when this Char event contains a printable character which |
| // should be processed by WebKit. |
| // isSystemKey will be set to true if this key event has Alt modifier, |
| // see WebInputEventFactory::keyboardEvent() for details. |
| if (wke->text[0]) { |
| wke->type = WebKit::WebInputEvent::Char; |
| wke->skip_in_browser = true; |
| host_view_->ForwardKeyboardEvent(*wke); |
| } |
| } |
| |
| void GtkIMContextWrapper::ProcessInputMethodResult(const GdkEventKey* event, |
| bool filtered) { |
| RenderWidgetHostImpl* host = RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost()); |
| if (!host) |
| return; |
| |
| bool committed = false; |
| // We do commit before preedit change, so that we can optimize some |
| // unnecessary preedit changes. |
| if (commit_text_.length()) { |
| if (filtered && NeedCommitByForwardingCharEvent()) { |
| // Send a Char event when we input a composed character without IMEs |
| // so that this event is to be dispatched to onkeypress() handlers, |
| // autofill, etc. |
| // Only commit text generated by a filtered key down event can be sent |
| // as a Char event, because a unfiltered key down event will probably |
| // generate another Char event. |
| // TODO(james.su@gmail.com): Is it necessary to support non BMP chars |
| // here? |
| NativeWebKeyboardEvent char_event(commit_text_[0], |
| event->state, |
| base::Time::Now().ToDoubleT()); |
| char_event.skip_in_browser = true; |
| host_view_->ForwardKeyboardEvent(char_event); |
| } else { |
| committed = true; |
| // Send an IME event. |
| // Unlike a Char event, an IME event is NOT dispatched to onkeypress() |
| // handlers or autofill. |
| host->ImeConfirmComposition( |
| commit_text_,gfx::Range::InvalidRange(),false); |
| // Set this flag to false, as this composition session has been |
| // finished. |
| is_composing_text_ = false; |
| } |
| } |
| |
| // Send preedit text only if it's changed. |
| // If a text has been committed, then we don't need to send the empty |
| // preedit text again. |
| if (is_composition_changed_) { |
| if (composition_.text.length()) { |
| // Another composition session has been started. |
| is_composing_text_ = true; |
| // TODO(suzhe): convert both renderer_host and renderer to use |
| // ui::CompositionText. |
| const std::vector<WebKit::WebCompositionUnderline>& underlines = |
| reinterpret_cast<const std::vector<WebKit::WebCompositionUnderline>&>( |
| composition_.underlines); |
| host->ImeSetComposition(composition_.text, underlines, |
| composition_.selection.start(), |
| composition_.selection.end()); |
| } else if (!committed) { |
| host->ImeCancelComposition(); |
| } |
| } |
| } |
| |
| void GtkIMContextWrapper::ConfirmComposition() { |
| if (!is_enabled_) |
| return; |
| |
| DCHECK(!is_in_key_event_handler_); |
| |
| if (is_composing_text_) { |
| if (host_view_->GetRenderWidgetHost()) { |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->ImeConfirmComposition( |
| string16(), gfx::Range::InvalidRange(), false); |
| } |
| |
| // Reset the input method. |
| CancelComposition(); |
| } |
| } |
| |
| void GtkIMContextWrapper::HandleCommit(const string16& text) { |
| if (suppress_next_commit_) |
| return; |
| |
| // Append the text to the buffer, because commit signal might be fired |
| // multiple times when processing a key event. |
| commit_text_.append(text); |
| // Nothing needs to do, if it's currently in ProcessKeyEvent() |
| // handler, which will send commit text to webkit later. Otherwise, |
| // we need send it here. |
| // It's possible that commit signal is fired without a key event, for |
| // example when user input via a voice or handwriting recognition software. |
| // In this case, the text must be committed directly. |
| if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) { |
| // Workaround http://crbug.com/45478 by sending fake key down/up events. |
| SendFakeCompositionKeyEvent(WebKit::WebInputEvent::RawKeyDown); |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->ImeConfirmComposition( |
| text, gfx::Range::InvalidRange(), false); |
| SendFakeCompositionKeyEvent(WebKit::WebInputEvent::KeyUp); |
| } |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditStart() { |
| // Ignore preedit related signals triggered by CancelComposition() method. |
| if (suppress_next_commit_) |
| return; |
| is_composing_text_ = true; |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditChanged(const gchar* text, |
| PangoAttrList* attrs, |
| int cursor_position) { |
| // Ignore preedit related signals triggered by CancelComposition() method. |
| if (suppress_next_commit_) |
| return; |
| |
| // Don't set is_composition_changed_ to false if there is no change, because |
| // this handler might be called multiple times with the same data. |
| is_composition_changed_ = true; |
| composition_.Clear(); |
| |
| ui::ExtractCompositionTextFromGtkPreedit(text, attrs, cursor_position, |
| &composition_); |
| |
| // TODO(suzhe): due to a bug of webkit, we currently can't use selection range |
| // with composition string. See: https://bugs.webkit.org/show_bug.cgi?id=40805 |
| composition_.selection = gfx::Range(cursor_position); |
| |
| // In case we are using a buggy input method which doesn't fire |
| // "preedit_start" signal. |
| if (composition_.text.length()) |
| is_composing_text_ = true; |
| |
| // Nothing needs to do, if it's currently in ProcessKeyEvent() |
| // handler, which will send preedit text to webkit later. |
| // Otherwise, we need send it here if it's been changed. |
| if (!is_in_key_event_handler_ && is_composing_text_ && |
| host_view_->GetRenderWidgetHost()) { |
| // Workaround http://crbug.com/45478 by sending fake key down/up events. |
| SendFakeCompositionKeyEvent(WebKit::WebInputEvent::RawKeyDown); |
| // TODO(suzhe): convert both renderer_host and renderer to use |
| // ui::CompositionText. |
| const std::vector<WebKit::WebCompositionUnderline>& underlines = |
| reinterpret_cast<const std::vector<WebKit::WebCompositionUnderline>&>( |
| composition_.underlines); |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->ImeSetComposition( |
| composition_.text, underlines, composition_.selection.start(), |
| composition_.selection.end()); |
| SendFakeCompositionKeyEvent(WebKit::WebInputEvent::KeyUp); |
| } |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditEnd() { |
| if (composition_.text.length()) { |
| // The composition session has been finished. |
| composition_.Clear(); |
| is_composition_changed_ = true; |
| |
| // If there is still a preedit text when firing "preedit-end" signal, |
| // we need inform webkit to clear it. |
| // It's only necessary when it's not in ProcessKeyEvent (). |
| if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) { |
| RenderWidgetHostImpl::From( |
| host_view_->GetRenderWidgetHost())->ImeCancelComposition(); |
| } |
| } |
| |
| // Don't set is_composing_text_ to false here, because "preedit_end" |
| // signal may be fired before "commit" signal. |
| } |
| |
| gboolean GtkIMContextWrapper::HandleRetrieveSurrounding(GtkIMContext* context) { |
| if (!is_enabled_) |
| return TRUE; |
| |
| std::string text; |
| size_t cursor_index = 0; |
| |
| if (!is_enabled_ || !host_view_->RetrieveSurrounding(&text, &cursor_index)) { |
| gtk_im_context_set_surrounding(context, "", 0, 0); |
| return TRUE; |
| } |
| |
| gtk_im_context_set_surrounding(context, text.c_str(), text.length(), |
| cursor_index); |
| |
| return TRUE; |
| } |
| |
| void GtkIMContextWrapper::HandleHostViewRealize(GtkWidget* widget) { |
| // We should only set im context's client window once, because when setting |
| // client window.im context may destroy and recreate its internal states and |
| // objects. |
| GdkWindow* gdk_window = gtk_widget_get_window(widget); |
| if (gdk_window) { |
| gtk_im_context_set_client_window(context_, gdk_window); |
| gtk_im_context_set_client_window(context_simple_, gdk_window); |
| } |
| } |
| |
| void GtkIMContextWrapper::HandleHostViewUnrealize() { |
| gtk_im_context_set_client_window(context_, NULL); |
| gtk_im_context_set_client_window(context_simple_, NULL); |
| } |
| |
| void GtkIMContextWrapper::SendFakeCompositionKeyEvent( |
| WebKit::WebInputEvent::Type type) { |
| NativeWebKeyboardEvent fake_event; |
| fake_event.windowsKeyCode = kCompositionEventKeyCode; |
| fake_event.skip_in_browser = true; |
| fake_event.type = type; |
| host_view_->ForwardKeyboardEvent(fake_event); |
| } |
| |
| void GtkIMContextWrapper::HandleCommitThunk( |
| GtkIMContext* context, gchar* text, GtkIMContextWrapper* self) { |
| self->HandleCommit(UTF8ToUTF16(text)); |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditStartThunk( |
| GtkIMContext* context, GtkIMContextWrapper* self) { |
| self->HandlePreeditStart(); |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditChangedThunk( |
| GtkIMContext* context, GtkIMContextWrapper* self) { |
| gchar* text = NULL; |
| PangoAttrList* attrs = NULL; |
| gint cursor_position = 0; |
| gtk_im_context_get_preedit_string(context, &text, &attrs, &cursor_position); |
| self->HandlePreeditChanged(text, attrs, cursor_position); |
| g_free(text); |
| pango_attr_list_unref(attrs); |
| } |
| |
| void GtkIMContextWrapper::HandlePreeditEndThunk( |
| GtkIMContext* context, GtkIMContextWrapper* self) { |
| self->HandlePreeditEnd(); |
| } |
| |
| gboolean GtkIMContextWrapper::HandleRetrieveSurroundingThunk( |
| GtkIMContext* context, GtkIMContextWrapper* self) { |
| return self->HandleRetrieveSurrounding(context); |
| } |
| |
| void GtkIMContextWrapper::HandleHostViewRealizeThunk( |
| GtkWidget* widget, GtkIMContextWrapper* self) { |
| self->HandleHostViewRealize(widget); |
| } |
| |
| void GtkIMContextWrapper::HandleHostViewUnrealizeThunk( |
| GtkWidget* widget, GtkIMContextWrapper* self) { |
| self->HandleHostViewUnrealize(); |
| } |
| |
| } // namespace content |