/* GTK - The GIMP Toolkit * Copyright (C) 2000 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include "locale.h" #include #include #include "gtk/gtkintl.h" #include "gtk/gtklabel.h" #include "gtk/gtksignal.h" #include "gtk/gtkwindow.h" #include "gtkimcontextxim.h" typedef struct _StatusWindow StatusWindow; typedef struct _GtkXIMInfo GtkXIMInfo; struct _GtkIMContextXIM { GtkIMContext object; GtkXIMInfo *im_info; gchar *locale; gchar *mb_charset; GdkWindow *client_window; GtkWidget *client_widget; /* The status window for this input context; we claim the * status window when we are focused and have created an XIC */ StatusWindow *status_window; gint preedit_size; gint preedit_length; gunichar *preedit_chars; XIMFeedback *feedbacks; gint preedit_cursor; XIMCallback preedit_start_callback; XIMCallback preedit_done_callback; XIMCallback preedit_draw_callback; XIMCallback preedit_caret_callback; XIMCallback status_start_callback; XIMCallback status_done_callback; XIMCallback status_draw_callback; XIMCallback string_conversion_callback; XIC ic; guint filter_key_release : 1; guint use_preedit : 1; guint finalizing : 1; guint in_toplevel : 1; guint has_focus : 1; }; struct _GtkXIMInfo { GdkScreen *screen; XIM im; char *locale; XIMStyle preedit_style_setting; XIMStyle status_style_setting; XIMStyle style; GtkSettings *settings; gulong status_set; gulong preedit_set; XIMStyles *xim_styles; GSList *ics; guint reconnecting :1; guint supports_string_conversion; }; /* A context status window; these are kept in the status_windows list. */ struct _StatusWindow { GtkWidget *window; /* Toplevel window to which the status window corresponds */ GtkWidget *toplevel; /* Currently focused GtkIMContextXIM for the toplevel, if any */ GtkIMContextXIM *context; }; static void gtk_im_context_xim_class_init (GtkIMContextXIMClass *class); static void gtk_im_context_xim_init (GtkIMContextXIM *im_context_xim); static void gtk_im_context_xim_finalize (GObject *obj); static void gtk_im_context_xim_set_client_window (GtkIMContext *context, GdkWindow *client_window); static gboolean gtk_im_context_xim_filter_keypress (GtkIMContext *context, GdkEventKey *key); static void gtk_im_context_xim_reset (GtkIMContext *context); static void gtk_im_context_xim_focus_in (GtkIMContext *context); static void gtk_im_context_xim_focus_out (GtkIMContext *context); static void gtk_im_context_xim_set_cursor_location (GtkIMContext *context, GdkRectangle *area); static void gtk_im_context_xim_set_use_preedit (GtkIMContext *context, gboolean use_preedit); static void gtk_im_context_xim_get_preedit_string (GtkIMContext *context, gchar **str, PangoAttrList **attrs, gint *cursor_pos); static void reinitialize_ic (GtkIMContextXIM *context_xim); static void set_ic_client_window (GtkIMContextXIM *context_xim, GdkWindow *client_window); static void setup_styles (GtkXIMInfo *info); static void update_client_widget (GtkIMContextXIM *context_xim); static void update_status_window (GtkIMContextXIM *context_xim); static StatusWindow *status_window_get (GtkWidget *toplevel); static void status_window_free (StatusWindow *status_window); static void status_window_set_text (StatusWindow *status_window, const gchar *text); static void xim_destroy_callback (XIM xim, XPointer client_data, XPointer call_data); static XIC gtk_im_context_xim_get_ic (GtkIMContextXIM *context_xim); static GObjectClass *parent_class; GType gtk_type_im_context_xim = 0; GSList *open_ims = NULL; /* List of status windows for different toplevels */ static GSList *status_windows = NULL; void gtk_im_context_xim_register_type (GTypeModule *type_module) { static const GTypeInfo im_context_xim_info = { sizeof (GtkIMContextXIMClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gtk_im_context_xim_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkIMContextXIM), 0, (GInstanceInitFunc) gtk_im_context_xim_init, }; gtk_type_im_context_xim = g_type_module_register_type (type_module, GTK_TYPE_IM_CONTEXT, "GtkIMContextXIM", &im_context_xim_info, 0); } #define PREEDIT_MASK (XIMPreeditCallbacks | XIMPreeditPosition | \ XIMPreeditArea | XIMPreeditNothing | XIMPreeditNone) #define STATUS_MASK (XIMStatusCallbacks | XIMStatusArea | \ XIMStatusNothing | XIMStatusNone) #define ALLOWED_MASK (XIMPreeditCallbacks | XIMPreeditNothing | XIMPreeditNone | \ XIMStatusCallbacks | XIMStatusNothing | XIMStatusNone) static XIMStyle choose_better_style (XIMStyle style1, XIMStyle style2) { XIMStyle s1, s2, u; if (style1 == 0) return style2; if (style2 == 0) return style1; if ((style1 & (PREEDIT_MASK | STATUS_MASK)) == (style2 & (PREEDIT_MASK | STATUS_MASK))) return style1; s1 = style1 & PREEDIT_MASK; s2 = style2 & PREEDIT_MASK; u = s1 | s2; if (s1 != s2) { if (u & XIMPreeditCallbacks) return (s1 == XIMPreeditCallbacks) ? style1 : style2; else if (u & XIMPreeditPosition) return (s1 == XIMPreeditPosition) ? style1 :style2; else if (u & XIMPreeditArea) return (s1 == XIMPreeditArea) ? style1 : style2; else if (u & XIMPreeditNothing) return (s1 == XIMPreeditNothing) ? style1 : style2; else if (u & XIMPreeditNone) return (s1 == XIMPreeditNone) ? style1 : style2; } else { s1 = style1 & STATUS_MASK; s2 = style2 & STATUS_MASK; u = s1 | s2; if (u & XIMStatusCallbacks) return (s1 == XIMStatusCallbacks) ? style1 : style2; else if (u & XIMStatusArea) return (s1 == XIMStatusArea) ? style1 : style2; else if (u & XIMStatusNothing) return (s1 == XIMStatusNothing) ? style1 : style2; else if (u & XIMStatusNone) return (s1 == XIMStatusNone) ? style1 : style2; } return 0; /* Get rid of stupid warning */ } static void reinitialize_all_ics (GtkXIMInfo *info) { GSList *tmp_list; for (tmp_list = info->ics; tmp_list; tmp_list = tmp_list->next) reinitialize_ic (tmp_list->data); } static void status_style_change (GtkXIMInfo *info) { GtkIMStatusStyle status_style; g_object_get (info->settings, "gtk-im-status-style", &status_style, NULL); if (status_style == GTK_IM_STATUS_CALLBACK) info->status_style_setting = XIMStatusCallbacks; else if (status_style == GTK_IM_STATUS_NOTHING) info->status_style_setting = XIMStatusNothing; else if (status_style == GTK_IM_STATUS_NONE) info->status_style_setting = XIMStatusNone; else return; setup_styles (info); reinitialize_all_ics (info); } static void preedit_style_change (GtkXIMInfo *info) { GtkIMPreeditStyle preedit_style; g_object_get (info->settings, "gtk-im-preedit-style", &preedit_style, NULL); if (preedit_style == GTK_IM_PREEDIT_CALLBACK) info->preedit_style_setting = XIMPreeditCallbacks; else if (preedit_style == GTK_IM_PREEDIT_NOTHING) info->preedit_style_setting = XIMPreeditNothing; else if (preedit_style == GTK_IM_PREEDIT_NONE) info->preedit_style_setting = XIMPreeditNone; else return; setup_styles (info); reinitialize_all_ics (info); } static void setup_styles (GtkXIMInfo *info) { int i; unsigned long settings_preference; XIMStyles *xim_styles = info->xim_styles; settings_preference = info->status_style_setting|info->preedit_style_setting; info->style = 0; if (xim_styles) { for (i = 0; i < xim_styles->count_styles; i++) if ((xim_styles->supported_styles[i] & ALLOWED_MASK) == xim_styles->supported_styles[i]) { if (settings_preference == xim_styles->supported_styles[i]) { info->style = settings_preference; break; } info->style = choose_better_style (info->style, xim_styles->supported_styles[i]); } } if (info->style == 0) info->style = XIMPreeditNothing | XIMStatusNothing; } static void setup_im (GtkXIMInfo *info) { XIMValuesList *ic_values = NULL; XIMCallback im_destroy_callback; if (info->im == NULL) return; im_destroy_callback.client_data = (XPointer)info; im_destroy_callback.callback = (XIMProc)xim_destroy_callback; XSetIMValues (info->im, XNDestroyCallback, &im_destroy_callback, NULL); XGetIMValues (info->im, XNQueryInputStyle, &info->xim_styles, XNQueryICValuesList, &ic_values, NULL); info->settings = gtk_settings_get_for_screen (info->screen); if (!g_object_class_find_property (G_OBJECT_GET_CLASS (info->settings), "gtk-im-preedit-style")) gtk_settings_install_property (g_param_spec_enum ("gtk-im-preedit-style", P_("IM Preedit style"), P_("How to draw the input method preedit string"), GTK_TYPE_IM_PREEDIT_STYLE, GTK_IM_PREEDIT_CALLBACK, G_PARAM_READWRITE)); if (!g_object_class_find_property (G_OBJECT_GET_CLASS (info->settings), "gtk-im-status-style")) gtk_settings_install_property (g_param_spec_enum ("gtk-im-status-style", P_("IM Status style"), P_("How to draw the input method statusbar"), GTK_TYPE_IM_STATUS_STYLE, GTK_IM_STATUS_CALLBACK, G_PARAM_READWRITE)); info->status_set = g_signal_connect_swapped (info->settings, "notify::gtk-im-status-style", G_CALLBACK (status_style_change), info); info->preedit_set = g_signal_connect_swapped (info->settings, "notify::gtk-im-preedit-style", G_CALLBACK (preedit_style_change), info); info->supports_string_conversion = FALSE; if (ic_values) { int i; for (i = 0; i < ic_values->count_values; i++) if (strcmp (ic_values->supported_values[i], XNStringConversionCallback) == 0) { info->supports_string_conversion = TRUE; break; } #if 0 for (i = 0; i < ic_values->count_values; i++) g_print ("%s\n", ic_values->supported_values[i]); for (i = 0; i < xim_styles->count_styles; i++) g_print ("%#x\n", xim_styles->supported_styles[i]); #endif XFree (ic_values); } status_style_change (info); preedit_style_change (info); } static void xim_info_display_closed (GdkDisplay *display, gboolean is_error, GtkXIMInfo *info) { GSList *ics, *tmp_list; open_ims = g_slist_remove (open_ims, info); ics = info->ics; info->ics = NULL; for (tmp_list = ics; tmp_list; tmp_list = tmp_list->next) set_ic_client_window (tmp_list->data, NULL); g_slist_free (ics); g_signal_handler_disconnect (info->settings, info->status_set); g_signal_handler_disconnect (info->settings, info->preedit_set); XFree (info->xim_styles->supported_styles); XFree (info->xim_styles); g_free (info->locale); if (info->im) XCloseIM (info->im); g_free (info); } static void xim_instantiate_callback (Display *display, XPointer client_data, XPointer call_data) { GtkXIMInfo *info = (GtkXIMInfo*)client_data; XIM im = NULL; im = XOpenIM (display, NULL, NULL, NULL); if (!im) return; info->im = im; setup_im (info); XUnregisterIMInstantiateCallback (display, NULL, NULL, NULL, xim_instantiate_callback, (XPointer)info); info->reconnecting = FALSE; } /* initialize info->im */ static void xim_info_try_im (GtkXIMInfo *info) { GdkScreen *screen = info->screen; GdkDisplay *display = gdk_screen_get_display (screen); g_assert (info->im == NULL); if (info->reconnecting) return; if (XSupportsLocale ()) { if (!XSetLocaleModifiers ("")) g_warning ("Unable to set locale modifiers with XSetLocaleModifiers()"); info->im = XOpenIM (GDK_DISPLAY_XDISPLAY (display), NULL, NULL, NULL); if (!info->im) { XRegisterIMInstantiateCallback (GDK_DISPLAY_XDISPLAY(display), NULL, NULL, NULL, xim_instantiate_callback, (XPointer)info); info->reconnecting = TRUE; return; } setup_im (info); g_signal_connect (display, "closed", G_CALLBACK (xim_info_display_closed), info); } } static void xim_destroy_callback (XIM xim, XPointer client_data, XPointer call_data) { GtkXIMInfo *info = (GtkXIMInfo*)client_data; info->im = NULL; g_signal_handler_disconnect (info->settings, info->status_set); g_signal_handler_disconnect (info->settings, info->preedit_set); reinitialize_all_ics (info); xim_info_try_im (info); return; } static GtkXIMInfo * get_im (GdkWindow *client_window, const char *locale) { GSList *tmp_list; GtkXIMInfo *info; GdkScreen *screen = gdk_drawable_get_screen (client_window); info = NULL; tmp_list = open_ims; while (tmp_list) { GtkXIMInfo *tmp_info = tmp_list->data; if (tmp_info->screen == screen && strcmp (tmp_info->locale, locale) == 0) { if (tmp_info->im) { return tmp_info; } else { tmp_info = tmp_info; break; } } tmp_list = tmp_list->next; } if (info == NULL) { info = g_new (GtkXIMInfo, 1); open_ims = g_slist_prepend (open_ims, info); info->screen = screen; info->locale = g_strdup (locale); info->xim_styles = NULL; info->preedit_style_setting = 0; info->status_style_setting = 0; info->settings = NULL; info->preedit_set = 0; info->status_set = 0; info->ics = NULL; info->reconnecting = FALSE; info->im = NULL; } xim_info_try_im (info); return info; } static void gtk_im_context_xim_class_init (GtkIMContextXIMClass *class) { GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class); GObjectClass *gobject_class = G_OBJECT_CLASS (class); parent_class = g_type_class_peek_parent (class); im_context_class->set_client_window = gtk_im_context_xim_set_client_window; im_context_class->filter_keypress = gtk_im_context_xim_filter_keypress; im_context_class->reset = gtk_im_context_xim_reset; im_context_class->get_preedit_string = gtk_im_context_xim_get_preedit_string; im_context_class->focus_in = gtk_im_context_xim_focus_in; im_context_class->focus_out = gtk_im_context_xim_focus_out; im_context_class->set_cursor_location = gtk_im_context_xim_set_cursor_location; im_context_class->set_use_preedit = gtk_im_context_xim_set_use_preedit; gobject_class->finalize = gtk_im_context_xim_finalize; } static void gtk_im_context_xim_init (GtkIMContextXIM *im_context_xim) { im_context_xim->use_preedit = TRUE; im_context_xim->filter_key_release = FALSE; im_context_xim->finalizing = FALSE; im_context_xim->has_focus = FALSE; im_context_xim->in_toplevel = FALSE; } static void gtk_im_context_xim_finalize (GObject *obj) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (obj); context_xim->finalizing = TRUE; set_ic_client_window (context_xim, NULL); g_free (context_xim->locale); g_free (context_xim->mb_charset); G_OBJECT_CLASS (parent_class)->finalize (obj); } static void reinitialize_ic (GtkIMContextXIM *context_xim) { if (context_xim->ic) { XDestroyIC (context_xim->ic); context_xim->ic = NULL; update_status_window (context_xim); if (context_xim->preedit_length) { context_xim->preedit_length = 0; if (!context_xim->finalizing) g_signal_emit_by_name (context_xim, "preedit_changed"); } } /* reset filter_key_release flag, otherwise keystrokes will be doubled until reconnecting to XIM. */ context_xim->filter_key_release = FALSE; } static void set_ic_client_window (GtkIMContextXIM *context_xim, GdkWindow *client_window) { reinitialize_ic (context_xim); if (context_xim->client_window) { context_xim->im_info->ics = g_slist_remove (context_xim->im_info->ics, context_xim); context_xim->im_info = NULL; } context_xim->client_window = client_window; if (context_xim->client_window) { context_xim->im_info = get_im (context_xim->client_window, context_xim->locale); context_xim->im_info->ics = g_slist_prepend (context_xim->im_info->ics, context_xim); } update_client_widget (context_xim); } static void gtk_im_context_xim_set_client_window (GtkIMContext *context, GdkWindow *client_window) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); set_ic_client_window (context_xim, client_window); } GtkIMContext * gtk_im_context_xim_new (void) { GtkIMContextXIM *result; const gchar *charset; result = GTK_IM_CONTEXT_XIM (g_object_new (GTK_TYPE_IM_CONTEXT_XIM, NULL)); result->locale = g_strdup (setlocale (LC_CTYPE, NULL)); g_get_charset (&charset); result->mb_charset = g_strdup (charset); return GTK_IM_CONTEXT (result); } static char * mb_to_utf8 (GtkIMContextXIM *context_xim, const char *str) { GError *error = NULL; gchar *result; if (strcmp (context_xim->mb_charset, "UTF-8") == 0) result = g_strdup (str); else { result = g_convert (str, -1, "UTF-8", context_xim->mb_charset, NULL, NULL, &error); if (!result) { g_warning ("Error converting text from IM to UTF-8: %s\n", error->message); g_error_free (error); } } return result; } static gboolean gtk_im_context_xim_filter_keypress (GtkIMContext *context, GdkEventKey *event) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); XIC ic = gtk_im_context_xim_get_ic (context_xim); gchar static_buffer[256]; gchar *buffer = static_buffer; gint buffer_size = sizeof(static_buffer) - 1; gint num_bytes = 0; KeySym keysym; Status status; gboolean result = FALSE; GdkWindow *root_window = gdk_screen_get_root_window (gdk_drawable_get_screen (event->window)); XKeyPressedEvent xevent; if (event->type == GDK_KEY_RELEASE && !context_xim->filter_key_release) return FALSE; xevent.type = (event->type == GDK_KEY_PRESS) ? KeyPress : KeyRelease; xevent.serial = 0; /* hope it doesn't matter */ xevent.send_event = event->send_event; xevent.display = GDK_DRAWABLE_XDISPLAY (event->window); xevent.window = GDK_DRAWABLE_XID (event->window); xevent.root = GDK_DRAWABLE_XID (root_window); xevent.subwindow = xevent.window; xevent.time = event->time; xevent.x = xevent.x_root = 0; xevent.y = xevent.y_root = 0; xevent.state = event->state; xevent.keycode = event->hardware_keycode; xevent.same_screen = True; if (XFilterEvent ((XEvent *)&xevent, GDK_DRAWABLE_XID (context_xim->client_window))) return TRUE; again: if (ic) num_bytes = XmbLookupString (ic, &xevent, buffer, buffer_size, &keysym, &status); else { num_bytes = XLookupString (&xevent, buffer, buffer_size, &keysym, NULL); status = XLookupBoth; } if (status == XBufferOverflow) { buffer_size = num_bytes; if (buffer != static_buffer) g_free (buffer); buffer = g_malloc (num_bytes + 1); goto again; } /* I don't know how we should properly handle XLookupKeysym or XLookupBoth * here ... do input methods actually change the keysym? we can't really * feed it back to accelerator processing at this point... */ if (status == XLookupChars || status == XLookupBoth) { char *result_utf8; buffer[num_bytes] = '\0'; result_utf8 = mb_to_utf8 (context_xim, buffer); if (result_utf8) { if ((guchar)result_utf8[0] >= 0x20 && result_utf8[0] != 0x7f) /* Some IM have a nasty habit of converting * control characters into strings */ { g_signal_emit_by_name (context, "commit", result_utf8); result = TRUE; } g_free (result_utf8); } } if (buffer != static_buffer) g_free (buffer); return result; } static void gtk_im_context_xim_focus_in (GtkIMContext *context) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); if (!context_xim->has_focus) { XIC ic = gtk_im_context_xim_get_ic (context_xim); context_xim->has_focus = TRUE; update_status_window (context_xim); if (ic) XSetICFocus (ic); } return; } static void gtk_im_context_xim_focus_out (GtkIMContext *context) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); if (context_xim->has_focus) { XIC ic = gtk_im_context_xim_get_ic (context_xim); context_xim->has_focus = FALSE; update_status_window (context_xim); if (ic) XUnsetICFocus (ic); } return; } static void gtk_im_context_xim_set_cursor_location (GtkIMContext *context, GdkRectangle *area) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); XIC ic = gtk_im_context_xim_get_ic (context_xim); XVaNestedList preedit_attr; XPoint spot; if (!ic) return; spot.x = area->x; spot.y = area->y; preedit_attr = XVaCreateNestedList (0, XNSpotLocation, &spot, 0); XSetICValues (ic, XNPreeditAttributes, preedit_attr, NULL); XFree(preedit_attr); return; } static void gtk_im_context_xim_set_use_preedit (GtkIMContext *context, gboolean use_preedit) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); use_preedit = use_preedit != FALSE; if (context_xim->use_preedit != use_preedit) { context_xim->use_preedit = use_preedit; reinitialize_ic (context_xim); } return; } static void gtk_im_context_xim_reset (GtkIMContext *context) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); XIC ic = gtk_im_context_xim_get_ic (context_xim); gchar *result; /* restore conversion state after resetting ic later */ XIMPreeditState preedit_state = XIMPreeditUnKnown; XVaNestedList preedit_attr; gboolean have_preedit_state = FALSE; if (!ic) return; if (context_xim->preedit_length == 0) return; preedit_attr = XVaCreateNestedList(0, XNPreeditState, &preedit_state, 0); if (!XGetICValues(ic, XNPreeditAttributes, preedit_attr, NULL)) have_preedit_state = TRUE; XFree(preedit_attr); result = XmbResetIC (ic); preedit_attr = XVaCreateNestedList(0, XNPreeditState, preedit_state, 0); if (have_preedit_state) XSetICValues(ic, XNPreeditAttributes, preedit_attr, NULL); XFree(preedit_attr); if (result) { char *result_utf8 = mb_to_utf8 (context_xim, result); if (result_utf8) { g_signal_emit_by_name (context, "commit", result_utf8); g_free (result_utf8); } } if (context_xim->preedit_length) { context_xim->preedit_length = 0; g_signal_emit_by_name (context, "preedit_changed"); } XFree (result); } /* Mask of feedback bits that we render */ #define FEEDBACK_MASK (XIMReverse | XIMUnderline) static void add_feedback_attr (PangoAttrList *attrs, const gchar *str, XIMFeedback feedback, gint start_pos, gint end_pos) { PangoAttribute *attr; gint start_index = g_utf8_offset_to_pointer (str, start_pos) - str; gint end_index = g_utf8_offset_to_pointer (str, end_pos) - str; if (feedback & XIMUnderline) { attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE); attr->start_index = start_index; attr->end_index = end_index; pango_attr_list_change (attrs, attr); } if (feedback & XIMReverse) { attr = pango_attr_foreground_new (0xffff, 0xffff, 0xffff); attr->start_index = start_index; attr->end_index = end_index; pango_attr_list_change (attrs, attr); attr = pango_attr_background_new (0, 0, 0); attr->start_index = start_index; attr->end_index = end_index; pango_attr_list_change (attrs, attr); } if (feedback & ~FEEDBACK_MASK) g_warning ("Unrendered feedback style: %#lx", feedback & ~FEEDBACK_MASK); } static void gtk_im_context_xim_get_preedit_string (GtkIMContext *context, gchar **str, PangoAttrList **attrs, gint *cursor_pos) { GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); gchar *utf8 = g_ucs4_to_utf8 (context_xim->preedit_chars, context_xim->preedit_length, NULL, NULL, NULL); if (attrs) { int i; XIMFeedback last_feedback = 0; gint start = -1; *attrs = pango_attr_list_new (); for (i = 0; i < context_xim->preedit_length; i++) { XIMFeedback new_feedback = context_xim->feedbacks[i] & FEEDBACK_MASK; if (new_feedback != last_feedback) { if (start >= 0) add_feedback_attr (*attrs, utf8, last_feedback, start, i); last_feedback = new_feedback; start = i; } } if (start >= 0) add_feedback_attr (*attrs, utf8, last_feedback, start, i); } if (str) *str = utf8; else g_free (utf8); if (cursor_pos) *cursor_pos = context_xim->preedit_cursor; } static int preedit_start_callback (XIC xic, XPointer client_data, XPointer call_data) { GtkIMContext *context = GTK_IM_CONTEXT (client_data); GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); if (!context_xim->finalizing) g_signal_emit_by_name (context, "preedit_start"); return -1; /* No length limit */ } static void preedit_done_callback (XIC xic, XPointer client_data, XPointer call_data) { GtkIMContext *context = GTK_IM_CONTEXT (client_data); GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context); if (context_xim->preedit_length) { context_xim->preedit_length = 0; if (!context_xim->finalizing) g_signal_emit_by_name (context_xim, "preedit_changed"); } if (!context_xim->finalizing) g_signal_emit_by_name (context, "preedit_end"); } static gint xim_text_to_utf8 (GtkIMContextXIM *context, XIMText *xim_text, gchar **text) { gint text_length = 0; GError *error = NULL; gchar *result = NULL; if (xim_text && xim_text->string.multi_byte) { if (xim_text->encoding_is_wchar) { g_warning ("Wide character return from Xlib not currently supported"); *text = NULL; return 0; } if (strcmp (context->mb_charset, "UTF-8") == 0) result = g_strdup (xim_text->string.multi_byte); else result = g_convert (xim_text->string.multi_byte, -1, "UTF-8", context->mb_charset, NULL, NULL, &error); if (result) { text_length = g_utf8_strlen (result, -1); if (text_length != xim_text->length) { g_warning ("Size mismatch when converting text from input method: supplied length = %d\n, result length = %d", xim_text->length, text_length); } } else { g_warning ("Error converting text from IM to UCS-4: %s", error->message); g_error_free (error); *text = NULL; return 0; } *text = result; return text_length; } else { *text = NULL; return 0; } } static void preedit_draw_callback (XIC xic, XPointer client_data, XIMPreeditDrawCallbackStruct *call_data) { GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data); XIMText *new_xim_text = call_data->text; gint new_text_length; gunichar *new_text = NULL; gint i; gint diff; gint new_length; gchar *tmp; gint chg_first = CLAMP (call_data->chg_first, 0, context->preedit_length); gint chg_length = CLAMP (call_data->chg_length, 0, context->preedit_length - chg_first); context->preedit_cursor = call_data->caret; if (chg_first != call_data->chg_first || chg_length != call_data->chg_length) g_warning ("Invalid change to preedit string, first=%d length=%d (orig length == %d)", call_data->chg_first, call_data->chg_length, context->preedit_length); new_text_length = xim_text_to_utf8 (context, new_xim_text, &tmp); if (tmp) { new_text = g_utf8_to_ucs4_fast (tmp, -1, NULL); g_free (tmp); } diff = new_text_length - chg_length; new_length = context->preedit_length + diff; if (new_length > context->preedit_size) { context->preedit_size = new_length; context->preedit_chars = g_renew (gunichar, context->preedit_chars, new_length); context->feedbacks = g_renew (XIMFeedback, context->feedbacks, new_length); } if (diff < 0) { for (i = chg_first + chg_length ; i < context->preedit_length; i++) { context->preedit_chars[i + diff] = context->preedit_chars[i]; context->feedbacks[i + diff] = context->feedbacks[i]; } } else { for (i = context->preedit_length - 1; i >= chg_first + chg_length ; i--) { context->preedit_chars[i + diff] = context->preedit_chars[i]; context->feedbacks[i + diff] = context->feedbacks[i]; } } for (i = 0; i < new_text_length; i++) { context->preedit_chars[chg_first + i] = new_text[i]; context->feedbacks[chg_first + i] = new_xim_text->feedback[i]; } context->preedit_length += diff; if (new_text) g_free (new_text); if (!context->finalizing) g_signal_emit_by_name (context, "preedit_changed"); } static void preedit_caret_callback (XIC xic, XPointer client_data, XIMPreeditCaretCallbackStruct *call_data) { GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data); if (call_data->direction == XIMAbsolutePosition) { context->preedit_cursor = call_data->position; if (!context->finalizing) g_signal_emit_by_name (context, "preedit_changed"); } else { g_warning ("Caret movement command: %d %d %d not supported", call_data->position, call_data->direction, call_data->style); } } static void status_start_callback (XIC xic, XPointer client_data, XPointer call_data) { return; } static void status_done_callback (XIC xic, XPointer client_data, XPointer call_data) { return; } static void status_draw_callback (XIC xic, XPointer client_data, XIMStatusDrawCallbackStruct *call_data) { GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data); if (call_data->type == XIMTextType) { gchar *text; xim_text_to_utf8 (context, call_data->data.text, &text); if (context->status_window) status_window_set_text (context->status_window, text ? text : ""); } else /* bitmap */ { g_print ("Status drawn with bitmap - id = %#lx\n", call_data->data.bitmap); } } static void string_conversion_callback (XIC xic, XPointer client_data, XPointer call_data) { GtkIMContextXIM *context_xim; XIMStringConversionCallbackStruct *conv_data; gchar *surrounding; gint cursor_index; context_xim = (GtkIMContextXIM *)client_data; conv_data = (XIMStringConversionCallbackStruct *)call_data; if (gtk_im_context_get_surrounding ((GtkIMContext *)context_xim, &surrounding, &cursor_index)) { gchar *text = NULL; gsize text_len = 0; gint subst_offset = 0, subst_nchars = 0; gint i; gchar *p = surrounding + cursor_index, *q; gshort position = (gshort)conv_data->position; if (position > 0) { for (i = position; i > 0 && *p; --i) p = g_utf8_next_char (p); if (i > 0) return; } /* According to X11R6.4 Xlib - C Library Reference Manual * section 13.5.7.3 String Conversion Callback, * XIMStringConversionPosition is starting position _relative_ * to current client's cursor position. So it should be able * to be negative, or referring to a position before the cursor * would be impossible. But current X protocol defines this as * unsigned short. So, compiler may warn about the value range * here. We hope the X protocol is fixed soon. */ else if (position < 0) { for (i = position; i < 0 && p > surrounding; ++i) p = g_utf8_prev_char (p); if (i < 0) return; } switch (conv_data->direction) { case XIMForwardChar: for (i = conv_data->factor, q = p; i > 0 && *q; --i) q = g_utf8_next_char (q); if (i > 0) break; text = g_locale_from_utf8 (p, q - p, NULL, &text_len, NULL); subst_offset = position; subst_nchars = conv_data->factor; break; case XIMBackwardChar: for (i = conv_data->factor, q = p; i > 0 && q > surrounding; --i) q = g_utf8_prev_char (q); if (i > 0) break; text = g_locale_from_utf8 (q, p - q, NULL, &text_len, NULL); subst_offset = position - conv_data->factor; subst_nchars = conv_data->factor; break; case XIMForwardWord: case XIMBackwardWord: case XIMCaretUp: case XIMCaretDown: case XIMNextLine: case XIMPreviousLine: case XIMLineStart: case XIMLineEnd: case XIMAbsolutePosition: case XIMDontChange: default: break; } /* block out any failure happenning to "text", including conversion */ if (text) { conv_data->text = (XIMStringConversionText *) malloc (sizeof (XIMStringConversionText)); if (conv_data->text) { conv_data->text->length = text_len; conv_data->text->feedback = NULL; conv_data->text->encoding_is_wchar = False; conv_data->text->string.mbs = (char *)malloc (text_len); if (conv_data->text->string.mbs) memcpy (conv_data->text->string.mbs, text, text_len); else { free (conv_data->text); conv_data->text = NULL; } } g_free (text); } if (conv_data->operation == XIMStringConversionSubstitution && subst_nchars > 0) { gtk_im_context_delete_surrounding ((GtkIMContext *)context_xim, subst_offset, subst_nchars); } g_free (surrounding); } } static XVaNestedList set_preedit_callback (GtkIMContextXIM *context_xim) { context_xim->preedit_start_callback.client_data = (XPointer)context_xim; context_xim->preedit_start_callback.callback = (XIMProc)preedit_start_callback; context_xim->preedit_done_callback.client_data = (XPointer)context_xim; context_xim->preedit_done_callback.callback = (XIMProc)preedit_done_callback; context_xim->preedit_draw_callback.client_data = (XPointer)context_xim; context_xim->preedit_draw_callback.callback = (XIMProc)preedit_draw_callback; context_xim->preedit_caret_callback.client_data = (XPointer)context_xim; context_xim->preedit_caret_callback.callback = (XIMProc)preedit_caret_callback; return XVaCreateNestedList (0, XNPreeditStartCallback, &context_xim->preedit_start_callback, XNPreeditDoneCallback, &context_xim->preedit_done_callback, XNPreeditDrawCallback, &context_xim->preedit_draw_callback, XNPreeditCaretCallback, &context_xim->preedit_caret_callback, NULL); } static XVaNestedList set_status_callback (GtkIMContextXIM *context_xim) { context_xim->status_start_callback.client_data = (XPointer)context_xim; context_xim->status_start_callback.callback = (XIMProc)status_start_callback; context_xim->status_done_callback.client_data = (XPointer)context_xim; context_xim->status_done_callback.callback = (XIMProc)status_done_callback; context_xim->status_draw_callback.client_data = (XPointer)context_xim; context_xim->status_draw_callback.callback = (XIMProc)status_draw_callback; return XVaCreateNestedList (0, XNStatusStartCallback, &context_xim->status_start_callback, XNStatusDoneCallback, &context_xim->status_done_callback, XNStatusDrawCallback, &context_xim->status_draw_callback, NULL); } static void set_string_conversion_callback (GtkIMContextXIM *context_xim, XIC xic) { if (!context_xim->im_info->supports_string_conversion) return; context_xim->string_conversion_callback.client_data = (XPointer)context_xim; context_xim->string_conversion_callback.callback = (XIMProc)string_conversion_callback; XSetICValues (xic, XNStringConversionCallback, (XPointer)&context_xim->string_conversion_callback, NULL); } static XIC gtk_im_context_xim_get_ic (GtkIMContextXIM *context_xim) { if (context_xim->im_info == NULL || context_xim->im_info->im == NULL) return NULL; if (!context_xim->ic) { const char *name1 = NULL; XVaNestedList list1 = NULL; const char *name2 = NULL; XVaNestedList list2 = NULL; XIMStyle im_style = 0; XIC xic = 0; if (context_xim->use_preedit && (context_xim->im_info->style & PREEDIT_MASK) == XIMPreeditCallbacks) { im_style |= XIMPreeditCallbacks; name1 = XNPreeditAttributes; list1 = set_preedit_callback (context_xim); } else if ((context_xim->im_info->style & PREEDIT_MASK) == XIMPreeditNone) im_style |= XIMPreeditNone; else im_style |= XIMPreeditNothing; if ((context_xim->im_info->style & STATUS_MASK) == XIMStatusCallbacks) { im_style |= XIMStatusCallbacks; if (name1 == NULL) { name1 = XNStatusAttributes; list1 = set_status_callback (context_xim); } else { name2 = XNStatusAttributes; list2 = set_status_callback (context_xim); } } else if ((context_xim->im_info->style & STATUS_MASK) == XIMStatusNone) im_style |= XIMStatusNone; else im_style |= XIMStatusNothing; xic = XCreateIC (context_xim->im_info->im, XNInputStyle, im_style, XNClientWindow, GDK_DRAWABLE_XID (context_xim->client_window), name1, list1, name2, list2, NULL); if (list1) XFree (list1); if (list2) XFree (list2); if (xic) { /* Don't filter key released events with XFilterEvents unless * input methods ask for. This is a workaround for Solaris input * method bug in C and European locales. It doubles each key * stroke if both key pressed and released events are filtered. * (bugzilla #81759) */ gulong mask = 0xaaaaaaaa; XGetICValues (xic, XNFilterEvents, &mask, NULL); context_xim->filter_key_release = (mask & KeyReleaseMask) != 0; set_string_conversion_callback (context_xim, xic); } context_xim->ic = xic; update_status_window (context_xim); if (xic && context_xim->has_focus) XSetICFocus (xic); } return context_xim->ic; } /***************************************************************** * Status Window handling * * A status window is a small window attached to the toplevel * that is used to display information to the user about the * current input operation. * * We claim the toplevel's status window for an input context if: * * A) The input context has a toplevel * B) The input context has the focus * C) The input context has an XIC associated with it * * Tracking A) and C) is pretty reliable since we * compute A) and create the XIC for C) ourselves. * For B) we basically have to depend on our callers * calling ::focus-in and ::focus-out at the right time. * * The toplevel is computed by walking up the GdkWindow * hierarchy from context->client_window until we find a * window that is owned by some widget, and then calling * gtk_widget_get_toplevel() on that widget. This should * handle both cases where we might have GdkWindows without widgets, * and cases where GtkWidgets have strange window hierarchies * (like a torn off GtkHandleBox.) * * The status window is visible if and only if there is text * for it; whenever a new GtkIMContextXIM claims the status * window, we blank out any existing text. We actually only * create a GtkWindow for the status window the first time * it is shown; this is an important optimization when we are * using XIM with something like a simple compose-key input * method that never needs a status window. *****************************************************************/ /* Called when we no longer need a status window */ static void disclaim_status_window (GtkIMContextXIM *context_xim) { if (context_xim->status_window) { g_assert (context_xim->status_window->context == context_xim); status_window_set_text (context_xim->status_window, ""); context_xim->status_window->context = NULL; context_xim->status_window = NULL; } } /* Called when we need a status window */ static void claim_status_window (GtkIMContextXIM *context_xim) { if (!context_xim->status_window && context_xim->client_widget) { GtkWidget *toplevel = gtk_widget_get_toplevel (context_xim->client_widget); if (toplevel && GTK_WIDGET_TOPLEVEL (toplevel)) { StatusWindow *status_window = status_window_get (toplevel); if (status_window->context) disclaim_status_window (status_window->context); status_window->context = context_xim; context_xim->status_window = status_window; } } } /* Basic call made whenever something changed that might cause * us to need, or not to need a status window. */ static void update_status_window (GtkIMContextXIM *context_xim) { if (context_xim->ic && context_xim->in_toplevel && context_xim->has_focus) claim_status_window (context_xim); else disclaim_status_window (context_xim); } /* Updates the in_toplevel flag for @context_xim */ static void update_in_toplevel (GtkIMContextXIM *context_xim) { if (context_xim->client_widget) { GtkWidget *toplevel = gtk_widget_get_toplevel (context_xim->client_widget); context_xim->in_toplevel = (toplevel && GTK_WIDGET_TOPLEVEL (toplevel)); } else context_xim->in_toplevel = FALSE; /* Some paranoia, in case we don't get a focus out */ if (!context_xim->in_toplevel) context_xim->has_focus = FALSE; update_status_window (context_xim); } /* Callback when @widget's toplevel changes. It will always * change from NULL to a window, or a window to NULL; * we use that intermediate NULL state to make sure * that we disclaim the toplevel status window for the old * window. */ static void on_client_widget_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel, GtkIMContextXIM *context_xim) { update_in_toplevel (context_xim); } /* Finds the GtkWidget that owns the window, or if none, the * widget owning the nearest parent that has a widget. */ static GtkWidget * widget_for_window (GdkWindow *window) { while (window) { gpointer user_data; gdk_window_get_user_data (window, &user_data); if (user_data) return user_data; window = gdk_window_get_parent (window); } return NULL; } /* Called when context_xim->client_window changes; takes care of * removing and/or setting up our watches for the toplevel */ static void update_client_widget (GtkIMContextXIM *context_xim) { GtkWidget *new_client_widget = widget_for_window (context_xim->client_window); if (new_client_widget != context_xim->client_widget) { if (context_xim->client_widget) { g_signal_handlers_disconnect_by_func (context_xim->client_widget, G_CALLBACK (on_client_widget_hierarchy_changed), context_xim); } context_xim->client_widget = new_client_widget; if (context_xim->client_widget) { g_signal_connect (context_xim->client_widget, "hierarchy-changed", G_CALLBACK (on_client_widget_hierarchy_changed), context_xim); } update_in_toplevel (context_xim); } } /* Called when the toplevel is destroyed; frees the status window */ static void on_status_toplevel_destroy (GtkWidget *toplevel, StatusWindow *status_window) { status_window_free (status_window); } /* Called when the screen for the toplevel changes; updates the * screen for the status window to match. */ static void on_status_toplevel_notify_screen (GtkWindow *toplevel, GParamSpec *pspec, StatusWindow *status_window) { if (status_window->window) gtk_window_set_screen (GTK_WINDOW (status_window->window), gtk_widget_get_screen (GTK_WIDGET (toplevel))); } /* Called when the toplevel window is moved; updates the position of * the status window to follow it. */ static gboolean on_status_toplevel_configure (GtkWidget *toplevel, GdkEventConfigure *event, StatusWindow *status_window) { GdkRectangle rect; GtkRequisition requisition; gint y; gint height; if (status_window->window) { height = gdk_screen_get_height (gtk_widget_get_screen (toplevel)); gdk_window_get_frame_extents (toplevel->window, &rect); gtk_widget_size_request (status_window->window, &requisition); if (rect.y + rect.height + requisition.height < height) y = rect.y + rect.height; else y = height - requisition.height; gtk_window_move (GTK_WINDOW (status_window->window), rect.x, y); } return FALSE; } /* Frees a status window and removes its link from the status_windows list */ static void status_window_free (StatusWindow *status_window) { status_windows = g_slist_remove (status_windows, status_window); if (status_window->context) status_window->context->status_window = NULL; g_signal_handlers_disconnect_by_func (status_window->toplevel, G_CALLBACK (on_status_toplevel_destroy), status_window); g_signal_handlers_disconnect_by_func (status_window->toplevel, G_CALLBACK (on_status_toplevel_notify_screen), status_window); g_signal_handlers_disconnect_by_func (status_window->toplevel, G_CALLBACK (on_status_toplevel_configure), status_window); if (status_window->window) gtk_widget_destroy (status_window->window); g_object_set_data (G_OBJECT (status_window->toplevel), "gtk-im-xim-status-window", NULL); g_free (status_window); } /* Finds the status window object for a toplevel, creating it if necessary. */ static StatusWindow * status_window_get (GtkWidget *toplevel) { StatusWindow *status_window; status_window = g_object_get_data (G_OBJECT (toplevel), "gtk-im-xim-status-window"); if (status_window) return status_window; status_window = g_new0 (StatusWindow, 1); status_window->toplevel = toplevel; status_windows = g_slist_prepend (status_windows, status_window); g_signal_connect (toplevel, "destroy", G_CALLBACK (on_status_toplevel_destroy), status_window); g_signal_connect (toplevel, "configure_event", G_CALLBACK (on_status_toplevel_configure), status_window); g_signal_connect (toplevel, "notify::screen", G_CALLBACK (on_status_toplevel_notify_screen), status_window); g_object_set_data (G_OBJECT (toplevel), "gtk-im-xim-status-window", status_window); return status_window; } /* Draw the background (normally white) and border for the status window */ static gboolean on_status_window_expose_event (GtkWidget *widget, GdkEventExpose *event) { gdk_draw_rectangle (widget->window, widget->style->base_gc [GTK_STATE_NORMAL], TRUE, 0, 0, widget->allocation.width, widget->allocation.height); gdk_draw_rectangle (widget->window, widget->style->text_gc [GTK_STATE_NORMAL], FALSE, 0, 0, widget->allocation.width - 1, widget->allocation.height - 1); return FALSE; } /* We watch the ::style-set signal for our label widget * and use that to change it's foreground color to match * the 'text' color of the toplevel window. The text/base * pair of colors might be reversed from the fg/bg pair * that are normally used for labels. */ static void on_status_window_style_set (GtkWidget *toplevel, GtkStyle *previous_style, GtkWidget *label) { gint i; for (i = 0; i < 5; i++) gtk_widget_modify_fg (label, i, &toplevel->style->text[i]); } /* Creates the widgets for the status window; called when we * first need to show text for the status window. */ static void status_window_make_window (StatusWindow *status_window) { GtkWidget *window; GtkWidget *status_label; status_window->window = gtk_window_new (GTK_WINDOW_POPUP); window = status_window->window; gtk_window_set_resizable (GTK_WINDOW (window), FALSE); gtk_widget_set_app_paintable (window, TRUE); status_label = gtk_label_new (""); gtk_misc_set_padding (GTK_MISC (status_label), 1, 1); gtk_widget_show (status_label); g_signal_connect (window, "style_set", G_CALLBACK (on_status_window_style_set), status_label); gtk_container_add (GTK_CONTAINER (window), status_label); g_signal_connect (window, "expose_event", G_CALLBACK (on_status_window_expose_event), NULL); gtk_window_set_screen (GTK_WINDOW (status_window->window), gtk_widget_get_screen (status_window->toplevel)); on_status_toplevel_configure (status_window->toplevel, NULL, status_window); } /* Updates the text in the status window, hiding or * showing the window as necessary. */ static void status_window_set_text (StatusWindow *status_window, const gchar *text) { if (text[0]) { GtkWidget *label; if (!status_window->window) status_window_make_window (status_window); label = GTK_BIN (status_window->window)->child; gtk_label_set_text (GTK_LABEL (label), text); gtk_widget_show (status_window->window); } else { if (status_window->window) gtk_widget_hide (status_window->window); } } /** * gtk_im_context_xim_shutdown: * * Destroys all the status windows that are kept by the XIM contexts. This * function should only be called by the XIM module exit routine. **/ void gtk_im_context_xim_shutdown (void) { while (status_windows) status_window_free (status_windows->data); }