/* 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 "config.h" #include #include #include "gtkprivate.h" #include "gtkaccelgroup.h" #include "gtkimcontextsimple.h" #include "gtksettings.h" #include "gtkwidget.h" #include "gtkdebug.h" #include "gtkintl.h" /** * SECTION:gtkimcontextsimple * @Short_description: An input method context supporting table-based input methods * @Title: GtkIMContextSimple */ typedef struct _GtkComposeTable GtkComposeTable; typedef struct _GtkComposeTableCompact GtkComposeTableCompact; struct _GtkIMContextSimplePrivate { GSList *tables; guint compose_buffer[GTK_MAX_COMPOSE_LEN + 1]; gunichar tentative_match; gint tentative_match_len; guint in_hex_sequence : 1; guint modifiers_dropped : 1; }; struct _GtkComposeTable { const guint16 *data; gint max_seq_len; gint n_seqs; }; struct _GtkComposeTableCompact { const guint16 *data; gint max_seq_len; gint n_index_size; gint n_index_stride; }; /* This file contains the table of the compose sequences, * static const guint16 gtk_compose_seqs_compact[] = {} * It is generated from the compose-parse.py script. */ #include "gtkimcontextsimpleseqs.h" /* From the values below, the value 24 means the number of different first keysyms * that exist in the Compose file (from Xorg). When running compose-parse.py without * parameters, you get the count that you can put here. Needed when updating the * gtkimcontextsimpleseqs.h header file (contains the compose sequences). */ static const GtkComposeTableCompact gtk_compose_table_compact = { gtk_compose_seqs_compact, 5, 24, 6 }; static const guint16 gtk_compose_ignore[] = { GDK_KEY_Shift_L, GDK_KEY_Shift_R, GDK_KEY_Control_L, GDK_KEY_Control_R, GDK_KEY_Caps_Lock, GDK_KEY_Shift_Lock, GDK_KEY_Meta_L, GDK_KEY_Meta_R, GDK_KEY_Alt_L, GDK_KEY_Alt_R, GDK_KEY_Super_L, GDK_KEY_Super_R, GDK_KEY_Hyper_L, GDK_KEY_Hyper_R, GDK_KEY_Mode_switch, GDK_KEY_ISO_Level3_Shift }; static void gtk_im_context_simple_finalize (GObject *obj); static gboolean gtk_im_context_simple_filter_keypress (GtkIMContext *context, GdkEventKey *key); static void gtk_im_context_simple_reset (GtkIMContext *context); static void gtk_im_context_simple_get_preedit_string (GtkIMContext *context, gchar **str, PangoAttrList **attrs, gint *cursor_pos); G_DEFINE_TYPE (GtkIMContextSimple, gtk_im_context_simple, GTK_TYPE_IM_CONTEXT) static void gtk_im_context_simple_class_init (GtkIMContextSimpleClass *class) { GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class); GObjectClass *gobject_class = G_OBJECT_CLASS (class); im_context_class->filter_keypress = gtk_im_context_simple_filter_keypress; im_context_class->reset = gtk_im_context_simple_reset; im_context_class->get_preedit_string = gtk_im_context_simple_get_preedit_string; gobject_class->finalize = gtk_im_context_simple_finalize; g_type_class_add_private (class, sizeof (GtkIMContextSimplePrivate)); } static void gtk_im_context_simple_init (GtkIMContextSimple *im_context_simple) { im_context_simple->priv = G_TYPE_INSTANCE_GET_PRIVATE (im_context_simple, GTK_TYPE_IM_CONTEXT_SIMPLE, GtkIMContextSimplePrivate); } static void gtk_im_context_simple_finalize (GObject *obj) { GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (obj); GtkIMContextSimplePrivate *priv = context_simple->priv; if (priv->tables) { g_slist_foreach (priv->tables, (GFunc)g_free, NULL); g_slist_free (priv->tables); priv->tables = NULL; } G_OBJECT_CLASS (gtk_im_context_simple_parent_class)->finalize (obj); } /** * gtk_im_context_simple_new: * * Creates a new #GtkIMContextSimple. * * Returns: a new #GtkIMContextSimple. **/ GtkIMContext * gtk_im_context_simple_new (void) { return g_object_new (GTK_TYPE_IM_CONTEXT_SIMPLE, NULL); } static void gtk_im_context_simple_commit_char (GtkIMContext *context, gunichar ch) { GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context); GtkIMContextSimplePrivate *priv = context_simple->priv; gchar buf[10]; gint len; g_return_if_fail (g_unichar_validate (ch)); len = g_unichar_to_utf8 (ch, buf); buf[len] = '\0'; if (priv->tentative_match || priv->in_hex_sequence) { priv->in_hex_sequence = FALSE; priv->tentative_match = 0; priv->tentative_match_len = 0; g_signal_emit_by_name (context_simple, "preedit-changed"); g_signal_emit_by_name (context_simple, "preedit-end"); } g_signal_emit_by_name (context, "commit", &buf); } static int compare_seq_index (const void *key, const void *value) { const guint *keysyms = key; const guint16 *seq = value; if (keysyms[0] < seq[0]) return -1; else if (keysyms[0] > seq[0]) return 1; return 0; } static int compare_seq (const void *key, const void *value) { int i = 0; const guint *keysyms = key; const guint16 *seq = value; while (keysyms[i]) { if (keysyms[i] < seq[i]) return -1; else if (keysyms[i] > seq[i]) return 1; i++; } return 0; } static gboolean check_table (GtkIMContextSimple *context_simple, const GtkComposeTable *table, gint n_compose) { GtkIMContextSimplePrivate *priv = context_simple->priv; gint row_stride = table->max_seq_len + 2; guint16 *seq; /* Will never match, if the sequence in the compose buffer is longer * than the sequences in the table. Further, compare_seq (key, val) * will overrun val if key is longer than val. */ if (n_compose > table->max_seq_len) return FALSE; seq = bsearch (priv->compose_buffer, table->data, table->n_seqs, sizeof (guint16) * row_stride, compare_seq); if (seq) { guint16 *prev_seq; /* Back up to the first sequence that matches to make sure * we find the exact match if there is one. */ while (seq > table->data) { prev_seq = seq - row_stride; if (compare_seq (priv->compose_buffer, prev_seq) != 0) break; seq = prev_seq; } if (n_compose == table->max_seq_len || seq[n_compose] == 0) /* complete sequence */ { guint16 *next_seq; gunichar value = 0x10000 * seq[table->max_seq_len] + seq[table->max_seq_len + 1]; /* We found a tentative match. See if there are any longer * sequences containing this subsequence */ next_seq = seq + row_stride; if (next_seq < table->data + row_stride * table->n_seqs) { if (compare_seq (priv->compose_buffer, next_seq) == 0) { priv->tentative_match = value; priv->tentative_match_len = n_compose; g_signal_emit_by_name (context_simple, "preedit-changed"); return TRUE; } } gtk_im_context_simple_commit_char (GTK_IM_CONTEXT (context_simple), value); priv->compose_buffer[0] = 0; } return TRUE; } return FALSE; } /* Checks if a keysym is a dead key. Dead key keysym values are defined in * ../gdk/gdkkeysyms.h and the first is GDK_KEY_dead_grave. As X.Org is updated, * more dead keys are added and we need to update the upper limit. * Currently, the upper limit is GDK_KEY_dead_dasia+1. The +1 has to do with * a temporary issue in the X.Org header files. * In future versions it will be just the keysym (no +1). */ #define IS_DEAD_KEY(k) \ ((k) >= GDK_KEY_dead_grave && (k) <= (GDK_KEY_dead_dasia+1)) #ifdef GDK_WINDOWING_WIN32 /* On Windows, user expectation is that typing a dead accent followed * by space will input the corresponding spacing character. The X * compose tables are different for dead acute and diaeresis, which * when followed by space produce a plain ASCII apostrophe and double * quote respectively. So special-case those. */ static gboolean check_win32_special_cases (GtkIMContextSimple *context_simple, gint n_compose) { GtkIMContextSimplePrivate *priv = context_simple->priv; if (n_compose == 2 && priv->compose_buffer[1] == GDK_KEY_space) { gunichar value = 0; switch (priv->compose_buffer[0]) { case GDK_KEY_dead_acute: value = 0x00B4; break; case GDK_KEY_dead_diaeresis: value = 0x00A8; break; } if (value > 0) { gtk_im_context_simple_commit_char (GTK_IM_CONTEXT (context_simple), value); priv->compose_buffer[0] = 0; GTK_NOTE (MISC, g_print ("win32: U+%04X\n", value)); return TRUE; } } return FALSE; } static void check_win32_special_case_after_compact_match (GtkIMContextSimple *context_simple, gint n_compose, guint value) { GtkIMContextSimplePrivate *priv = context_simple->priv; /* On Windows user expectation is that typing two dead accents will input * two corresponding spacing accents. */ if (n_compose == 2 && priv->compose_buffer[0] == priv->compose_buffer[1] && IS_DEAD_KEY (priv->compose_buffer[0])) { gtk_im_context_simple_commit_char (GTK_IM_CONTEXT (context_simple), value); GTK_NOTE (MISC, g_print ("win32: U+%04X ", value)); } } #endif static gboolean check_compact_table (GtkIMContextSimple *context_simple, const GtkComposeTableCompact *table, gint n_compose) { GtkIMContextSimplePrivate *priv = context_simple->priv; gint row_stride; guint16 *seq_index; guint16 *seq; gint i; gboolean match; gunichar value; /* Will never match, if the sequence in the compose buffer is longer * than the sequences in the table. Further, compare_seq (key, val) * will overrun val if key is longer than val. */ if (n_compose > table->max_seq_len) return FALSE; seq_index = bsearch (priv->compose_buffer, table->data, table->n_index_size, sizeof (guint16) * table->n_index_stride, compare_seq_index); if (!seq_index) { GTK_NOTE (MISC, g_print ("compact: no\n")); return FALSE; } if (seq_index && n_compose == 1) { GTK_NOTE (MISC, g_print ("compact: yes\n")); return TRUE; } GTK_NOTE (MISC, g_print ("compact: %d ", *seq_index)); seq = NULL; match = FALSE; for (i = n_compose - 1; i < table->max_seq_len; i++) { row_stride = i + 1; if (seq_index[i + 1] - seq_index[i] > 0) { seq = bsearch (priv->compose_buffer + 1, table->data + seq_index[i], (seq_index[i + 1] - seq_index[i]) / row_stride, sizeof (guint16) * row_stride, compare_seq); if (seq) { if (i == n_compose - 1) { value = seq[row_stride - 1]; match = TRUE; } else { if (match) { GTK_NOTE (MISC, g_print ("tentative match U+%04X ", value)); priv->tentative_match = value; priv->tentative_match_len = n_compose; } g_signal_emit_by_name (context_simple, "preedit-changed"); GTK_NOTE (MISC, g_print ("yes\n")); return TRUE; } } } } if (match) { gtk_im_context_simple_commit_char (GTK_IM_CONTEXT (context_simple), value); #ifdef G_OS_WIN32 check_win32_special_case_after_compact_match (context_simple, n_compose, value); #endif priv->compose_buffer[0] = 0; GTK_NOTE (MISC, g_print ("U+%04X\n", value)); return TRUE; } GTK_NOTE (MISC, g_print ("no\n")); return FALSE; } /* This function receives a sequence of Unicode characters and tries to * normalize it (NFC). We check for the case the the resulting string * has length 1 (single character). * NFC normalisation normally rearranges diacritic marks, unless these * belong to the same Canonical Combining Class. * If they belong to the same canonical combining class, we produce all * permutations of the diacritic marks, then attempt to normalize. */ static gboolean check_normalize_nfc (gunichar* combination_buffer, gint n_compose) { gunichar combination_buffer_temp[GTK_MAX_COMPOSE_LEN]; gchar *combination_utf8_temp = NULL; gchar *nfc_temp = NULL; gint n_combinations; gunichar temp_swap; gint i; n_combinations = 1; for (i = 1; i < n_compose; i++ ) n_combinations *= i; /* Xorg reuses dead_tilde for the perispomeni diacritic mark. * We check if base character belongs to Greek Unicode block, * and if so, we replace tilde with perispomeni. */ if (combination_buffer[0] >= 0x390 && combination_buffer[0] <= 0x3FF) { for (i = 1; i < n_compose; i++ ) if (combination_buffer[i] == 0x303) combination_buffer[i] = 0x342; } memcpy (combination_buffer_temp, combination_buffer, GTK_MAX_COMPOSE_LEN * sizeof (gunichar) ); for (i = 0; i < n_combinations; i++ ) { g_unicode_canonical_ordering (combination_buffer_temp, n_compose); combination_utf8_temp = g_ucs4_to_utf8 (combination_buffer_temp, -1, NULL, NULL, NULL); nfc_temp = g_utf8_normalize (combination_utf8_temp, -1, G_NORMALIZE_NFC); if (g_utf8_strlen (nfc_temp, -1) == 1) { memcpy (combination_buffer, combination_buffer_temp, GTK_MAX_COMPOSE_LEN * sizeof (gunichar) ); g_free (combination_utf8_temp); g_free (nfc_temp); return TRUE; } g_free (combination_utf8_temp); g_free (nfc_temp); if (n_compose > 2) { temp_swap = combination_buffer_temp[i % (n_compose - 1) + 1]; combination_buffer_temp[i % (n_compose - 1) + 1] = combination_buffer_temp[(i+1) % (n_compose - 1) + 1]; combination_buffer_temp[(i+1) % (n_compose - 1) + 1] = temp_swap; } else break; } return FALSE; } static gboolean check_algorithmically (GtkIMContextSimple *context_simple, gint n_compose) { GtkIMContextSimplePrivate *priv = context_simple->priv; gint i; gunichar combination_buffer[GTK_MAX_COMPOSE_LEN]; gchar *combination_utf8, *nfc; if (n_compose >= GTK_MAX_COMPOSE_LEN) return FALSE; for (i = 0; i < n_compose && IS_DEAD_KEY (priv->compose_buffer[i]); i++) ; if (i == n_compose) return TRUE; if (i > 0 && i == n_compose - 1) { combination_buffer[0] = gdk_keyval_to_unicode (priv->compose_buffer[i]); combination_buffer[n_compose] = 0; i--; while (i >= 0) { switch (priv->compose_buffer[i]) { #define CASE(keysym, unicode) \ case GDK_KEY_dead_##keysym: combination_buffer[i+1] = unicode; break CASE (grave, 0x0300); CASE (acute, 0x0301); CASE (circumflex, 0x0302); CASE (tilde, 0x0303); /* Also used with perispomeni, 0x342. */ CASE (macron, 0x0304); CASE (breve, 0x0306); CASE (abovedot, 0x0307); CASE (diaeresis, 0x0308); CASE (hook, 0x0309); CASE (abovering, 0x030A); CASE (doubleacute, 0x030B); CASE (caron, 0x030C); CASE (abovecomma, 0x0313); /* Equivalent to psili */ CASE (abovereversedcomma, 0x0314); /* Equivalent to dasia */ CASE (horn, 0x031B); /* Legacy use for psili, 0x313 (or 0x343). */ CASE (belowdot, 0x0323); CASE (cedilla, 0x0327); CASE (ogonek, 0x0328); /* Legacy use for dasia, 0x314.*/ CASE (iota, 0x0345); CASE (voiced_sound, 0x3099); /* Per Markus Kuhn keysyms.txt file. */ CASE (semivoiced_sound, 0x309A); /* Per Markus Kuhn keysyms.txt file. */ /* The following cases are to be removed once xkeyboard-config, * xorg are fully updated. */ /* Workaround for typo in 1.4.x xserver-xorg */ case 0xfe66: combination_buffer[i+1] = 0x314; break; /* CASE (dasia, 0x314); */ /* CASE (perispomeni, 0x342); */ /* CASE (psili, 0x343); */ #undef CASE default: combination_buffer[i+1] = gdk_keyval_to_unicode (priv->compose_buffer[i]); } i--; } /* If the buffer normalizes to a single character, then modify the order * of combination_buffer accordingly, if necessary, and return TRUE. */ if (check_normalize_nfc (combination_buffer, n_compose)) { gunichar value; combination_utf8 = g_ucs4_to_utf8 (combination_buffer, -1, NULL, NULL, NULL); nfc = g_utf8_normalize (combination_utf8, -1, G_NORMALIZE_NFC); value = g_utf8_get_char (nfc); gtk_im_context_simple_commit_char (GTK_IM_CONTEXT (context_simple), value); priv->compose_buffer[0] = 0; g_free (combination_utf8); g_free (nfc); return TRUE; } } return FALSE; } /* In addition to the table-driven sequences, we allow Unicode hex * codes to be entered. The method chosen here is similar to the * one recommended in ISO 14755, but not exactly the same, since we * don't want to steal 16 valuable key combinations. * * A hex Unicode sequence must be started with Ctrl-Shift-U, followed * by a sequence of hex digits entered with Ctrl-Shift still held. * Releasing one of the modifiers or pressing space while the modifiers * are still held commits the character. It is possible to erase * digits using backspace. * * As an extension to the above, we also allow to start the sequence * with Ctrl-Shift-U, then release the modifiers before typing any * digits, and enter the digits without modifiers. */ static gboolean check_hex (GtkIMContextSimple *context_simple, gint n_compose) { GtkIMContextSimplePrivate *priv = context_simple->priv; /* See if this is a hex sequence, return TRUE if so */ gint i; GString *str; gulong n; gchar *nptr = NULL; gchar buf[7]; priv->tentative_match = 0; priv->tentative_match_len = 0; str = g_string_new (NULL); i = 0; while (i < n_compose) { gunichar ch; ch = gdk_keyval_to_unicode (priv->compose_buffer[i]); if (ch == 0) return FALSE; if (!g_unichar_isxdigit (ch)) return FALSE; buf[g_unichar_to_utf8 (ch, buf)] = '\0'; g_string_append (str, buf); ++i; } n = strtoul (str->str, &nptr, 16); /* If strtoul fails it probably means non-latin digits were used; * we should in principle handle that, but we probably don't. */ if (nptr - str->str < str->len) { g_string_free (str, TRUE); return FALSE; } else g_string_free (str, TRUE); if (g_unichar_validate (n)) { priv->tentative_match = n; priv->tentative_match_len = n_compose; } return TRUE; } static void beep_window (GdkWindow *window) { GdkScreen *screen = gdk_window_get_screen (window); gboolean beep; g_object_get (gtk_settings_get_for_screen (screen), "gtk-error-bell", &beep, NULL); if (beep) gdk_window_beep (window); } static gboolean no_sequence_matches (GtkIMContextSimple *context_simple, gint n_compose, GdkEventKey *event) { GtkIMContextSimplePrivate *priv = context_simple->priv; GtkIMContext *context; gunichar ch; context = GTK_IM_CONTEXT (context_simple); /* No compose sequences found, check first if we have a partial * match pending. */ if (priv->tentative_match) { gint len = priv->tentative_match_len; int i; gtk_im_context_simple_commit_char (context, priv->tentative_match); priv->compose_buffer[0] = 0; for (i=0; i < n_compose - len - 1; i++) { GdkEvent *tmp_event = gdk_event_copy ((GdkEvent *)event); tmp_event->key.keyval = priv->compose_buffer[len + i]; gtk_im_context_filter_keypress (context, (GdkEventKey *)tmp_event); gdk_event_free (tmp_event); } return gtk_im_context_filter_keypress (context, event); } else { priv->compose_buffer[0] = 0; if (n_compose > 1) /* Invalid sequence */ { beep_window (event->window); return TRUE; } ch = gdk_keyval_to_unicode (event->keyval); if (ch != 0 && !g_unichar_iscntrl (ch)) { gtk_im_context_simple_commit_char (context, ch); return TRUE; } else return FALSE; } } static gboolean is_hex_keyval (guint keyval) { gunichar ch = gdk_keyval_to_unicode (keyval); return g_unichar_isxdigit (ch); } static guint canonical_hex_keyval (GdkEventKey *event) { GdkKeymap *keymap = gdk_keymap_get_for_display (gdk_window_get_display (event->window)); guint keyval; guint *keyvals = NULL; gint n_vals = 0; gint i; /* See if the keyval is already a hex digit */ if (is_hex_keyval (event->keyval)) return event->keyval; /* See if this key would have generated a hex keyval in * any other state, and return that hex keyval if so */ gdk_keymap_get_entries_for_keycode (keymap, event->hardware_keycode, NULL, &keyvals, &n_vals); keyval = 0; i = 0; while (i < n_vals) { if (is_hex_keyval (keyvals[i])) { keyval = keyvals[i]; break; } ++i; } g_free (keyvals); if (keyval) return keyval; else /* No way to make it a hex digit */ return 0; } static gboolean gtk_im_context_simple_filter_keypress (GtkIMContext *context, GdkEventKey *event) { GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context); GtkIMContextSimplePrivate *priv = context_simple->priv; GdkDisplay *display = gdk_window_get_display (event->window); GSList *tmp_list; int n_compose = 0; GdkModifierType hex_mod_mask; gboolean have_hex_mods; gboolean is_hex_start; gboolean is_hex_end; gboolean is_backspace; gboolean is_escape; guint hex_keyval; int i; while (priv->compose_buffer[n_compose] != 0) n_compose++; if (event->type == GDK_KEY_RELEASE) { if (priv->in_hex_sequence && (event->keyval == GDK_KEY_Control_L || event->keyval == GDK_KEY_Control_R || event->keyval == GDK_KEY_Shift_L || event->keyval == GDK_KEY_Shift_R)) { if (priv->tentative_match && g_unichar_validate (priv->tentative_match)) { gtk_im_context_simple_commit_char (context, priv->tentative_match); priv->compose_buffer[0] = 0; } else if (n_compose == 0) { priv->modifiers_dropped = TRUE; } else { /* invalid hex sequence */ beep_window (event->window); priv->tentative_match = 0; priv->in_hex_sequence = FALSE; priv->compose_buffer[0] = 0; g_signal_emit_by_name (context_simple, "preedit-changed"); g_signal_emit_by_name (context_simple, "preedit-end"); } return TRUE; } else return FALSE; } /* Ignore modifier key presses */ for (i = 0; i < G_N_ELEMENTS (gtk_compose_ignore); i++) if (event->keyval == gtk_compose_ignore[i]) return FALSE; hex_mod_mask = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display), GDK_MODIFIER_INTENT_PRIMARY_ACCELERATOR); hex_mod_mask |= GDK_SHIFT_MASK; if (priv->in_hex_sequence && priv->modifiers_dropped) have_hex_mods = TRUE; else have_hex_mods = (event->state & (hex_mod_mask)) == hex_mod_mask; is_hex_start = event->keyval == GDK_KEY_U; is_hex_end = (event->keyval == GDK_KEY_space || event->keyval == GDK_KEY_KP_Space || event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_ISO_Enter || event->keyval == GDK_KEY_KP_Enter); is_backspace = event->keyval == GDK_KEY_BackSpace; is_escape = event->keyval == GDK_KEY_Escape; hex_keyval = canonical_hex_keyval (event); /* If we are already in a non-hex sequence, or * this keystroke is not hex modifiers + hex digit, don't filter * key events with accelerator modifiers held down. We only treat * Control and Alt as accel modifiers here, since Super, Hyper and * Meta are often co-located with Mode_Switch, Multi_Key or * ISO_Level3_Switch. */ if (!have_hex_mods || (n_compose > 0 && !priv->in_hex_sequence) || (n_compose == 0 && !priv->in_hex_sequence && !is_hex_start) || (priv->in_hex_sequence && !hex_keyval && !is_hex_start && !is_hex_end && !is_escape && !is_backspace)) { GdkDisplay *display; GdkModifierType no_text_input_mask; display = gdk_window_get_display (event->window); no_text_input_mask = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display), GDK_MODIFIER_INTENT_NO_TEXT_INPUT); if (event->state & no_text_input_mask || (priv->in_hex_sequence && priv->modifiers_dropped && (event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_ISO_Enter || event->keyval == GDK_KEY_KP_Enter))) { return FALSE; } } /* Handle backspace */ if (priv->in_hex_sequence && have_hex_mods && is_backspace) { if (n_compose > 0) { n_compose--; priv->compose_buffer[n_compose] = 0; check_hex (context_simple, n_compose); } else { priv->in_hex_sequence = FALSE; } g_signal_emit_by_name (context_simple, "preedit-changed"); if (!priv->in_hex_sequence) g_signal_emit_by_name (context_simple, "preedit-end"); return TRUE; } /* Check for hex sequence restart */ if (priv->in_hex_sequence && have_hex_mods && is_hex_start) { if (priv->tentative_match && g_unichar_validate (priv->tentative_match)) { gtk_im_context_simple_commit_char (context, priv->tentative_match); priv->compose_buffer[0] = 0; } else { /* invalid hex sequence */ if (n_compose > 0) beep_window (event->window); priv->tentative_match = 0; priv->in_hex_sequence = FALSE; priv->compose_buffer[0] = 0; } } /* Check for hex sequence start */ if (!priv->in_hex_sequence && have_hex_mods && is_hex_start) { priv->compose_buffer[0] = 0; priv->in_hex_sequence = TRUE; priv->modifiers_dropped = FALSE; priv->tentative_match = 0; g_signal_emit_by_name (context_simple, "preedit-start"); g_signal_emit_by_name (context_simple, "preedit-changed"); return TRUE; } /* Then, check for compose sequences */ if (priv->in_hex_sequence) { if (hex_keyval) priv->compose_buffer[n_compose++] = hex_keyval; else if (is_escape) { gtk_im_context_simple_reset (context); return TRUE; } else if (!is_hex_end) { /* non-hex character in hex sequence */ beep_window (event->window); return TRUE; } } else priv->compose_buffer[n_compose++] = event->keyval; priv->compose_buffer[n_compose] = 0; if (priv->in_hex_sequence) { /* If the modifiers are still held down, consider the sequence again */ if (have_hex_mods) { /* space or return ends the sequence, and we eat the key */ if (n_compose > 0 && is_hex_end) { if (priv->tentative_match && g_unichar_validate (priv->tentative_match)) { gtk_im_context_simple_commit_char (context, priv->tentative_match); priv->compose_buffer[0] = 0; } else { /* invalid hex sequence */ beep_window (event->window); priv->tentative_match = 0; priv->in_hex_sequence = FALSE; priv->compose_buffer[0] = 0; } } else if (!check_hex (context_simple, n_compose)) beep_window (event->window); g_signal_emit_by_name (context_simple, "preedit-changed"); if (!priv->in_hex_sequence) g_signal_emit_by_name (context_simple, "preedit-end"); return TRUE; } } else { tmp_list = priv->tables; while (tmp_list) { if (check_table (context_simple, tmp_list->data, n_compose)) return TRUE; tmp_list = tmp_list->next; } GTK_NOTE (MISC, { g_print ("[ "); for (i = 0; i < n_compose; i++) { const gchar *keyval_name = gdk_keyval_name (priv->compose_buffer[i]); if (keyval_name != NULL) g_print ("%s ", keyval_name); else g_print ("%04x ", priv->compose_buffer[i]); } g_print ("] "); }); #ifdef GDK_WINDOWING_WIN32 if (check_win32_special_cases (context_simple, n_compose)) return TRUE; #endif if (check_compact_table (context_simple, >k_compose_table_compact, n_compose)) return TRUE; if (check_algorithmically (context_simple, n_compose)) return TRUE; } /* The current compose_buffer doesn't match anything */ return no_sequence_matches (context_simple, n_compose, event); } static void gtk_im_context_simple_reset (GtkIMContext *context) { GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context); GtkIMContextSimplePrivate *priv = context_simple->priv; priv->compose_buffer[0] = 0; if (priv->tentative_match || priv->in_hex_sequence) { priv->in_hex_sequence = FALSE; priv->tentative_match = 0; priv->tentative_match_len = 0; g_signal_emit_by_name (context_simple, "preedit-changed"); g_signal_emit_by_name (context_simple, "preedit-end"); } } static void gtk_im_context_simple_get_preedit_string (GtkIMContext *context, gchar **str, PangoAttrList **attrs, gint *cursor_pos) { GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context); GtkIMContextSimplePrivate *priv = context_simple->priv; char outbuf[37]; /* up to 6 hex digits */ int len = 0; if (priv->in_hex_sequence) { int hexchars = 0; outbuf[0] = 'u'; len = 1; while (priv->compose_buffer[hexchars] != 0) { len += g_unichar_to_utf8 (gdk_keyval_to_unicode (priv->compose_buffer[hexchars]), outbuf + len); ++hexchars; } g_assert (len < 25); } else if (priv->tentative_match) len = g_unichar_to_utf8 (priv->tentative_match, outbuf); outbuf[len] = '\0'; if (str) *str = g_strdup (outbuf); if (attrs) { *attrs = pango_attr_list_new (); if (len) { PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE); attr->start_index = 0; attr->end_index = len; pango_attr_list_insert (*attrs, attr); } } if (cursor_pos) *cursor_pos = len; } /** * gtk_im_context_simple_add_table: (skip) * @context_simple: A #GtkIMContextSimple * @data: the table * @max_seq_len: Maximum length of a sequence in the table * (cannot be greater than #GTK_MAX_COMPOSE_LEN) * @n_seqs: number of sequences in the table * * Adds an additional table to search to the input context. * Each row of the table consists of @max_seq_len key symbols * followed by two #guint16 interpreted as the high and low * words of a #gunicode value. Tables are searched starting * from the last added. * * The table must be sorted in dictionary order on the * numeric value of the key symbol fields. (Values beyond * the length of the sequence should be zero.) **/ void gtk_im_context_simple_add_table (GtkIMContextSimple *context_simple, guint16 *data, gint max_seq_len, gint n_seqs) { GtkIMContextSimplePrivate *priv = context_simple->priv; GtkComposeTable *table; g_return_if_fail (GTK_IS_IM_CONTEXT_SIMPLE (context_simple)); g_return_if_fail (data != NULL); g_return_if_fail (max_seq_len <= GTK_MAX_COMPOSE_LEN); table = g_new (GtkComposeTable, 1); table->data = data; table->max_seq_len = max_seq_len; table->n_seqs = n_seqs; priv->tables = g_slist_prepend (priv->tables, table); }