diff options
Diffstat (limited to 'modules/input/gtkimcontextthai.c')
| -rw-r--r-- | modules/input/gtkimcontextthai.c | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/modules/input/gtkimcontextthai.c b/modules/input/gtkimcontextthai.c deleted file mode 100644 index 3c8aa752df..0000000000 --- a/modules/input/gtkimcontextthai.c +++ /dev/null @@ -1,347 +0,0 @@ -/* GTK - The GIMP Toolkit - * - * 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, see <http://www.gnu.org/licenses/>. - * - * Author: Theppitak Karoonboonyanan <thep@linux.thai.net> - * - */ - -#include <string.h> - -#include <gdk/gdkkeysyms.h> -#include "gtkimcontextthai.h" -#include "thai-charprop.h" - -static void gtk_im_context_thai_class_init (GtkIMContextThaiClass *class); -static void gtk_im_context_thai_init (GtkIMContextThai *im_context_thai); -static gboolean gtk_im_context_thai_filter_keypress (GtkIMContext *context, - GdkEventKey *key); - -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK -static void forget_previous_chars (GtkIMContextThai *context_thai); -static void remember_previous_char (GtkIMContextThai *context_thai, - gunichar new_char); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - -static GObjectClass *parent_class; - -GType gtk_type_im_context_thai = 0; - -void -gtk_im_context_thai_register_type (GTypeModule *type_module) -{ - const GTypeInfo im_context_thai_info = - { - sizeof (GtkIMContextThaiClass), - (GBaseInitFunc) NULL, - (GBaseFinalizeFunc) NULL, - (GClassInitFunc) gtk_im_context_thai_class_init, - NULL, /* class_finalize */ - NULL, /* class_data */ - sizeof (GtkIMContextThai), - 0, - (GInstanceInitFunc) gtk_im_context_thai_init, - }; - - gtk_type_im_context_thai = - g_type_module_register_type (type_module, - GTK_TYPE_IM_CONTEXT, - "GtkIMContextThai", - &im_context_thai_info, 0); -} - -static void -gtk_im_context_thai_class_init (GtkIMContextThaiClass *class) -{ - GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class); - - parent_class = g_type_class_peek_parent (class); - - im_context_class->filter_keypress = gtk_im_context_thai_filter_keypress; -} - -static void -gtk_im_context_thai_init (GtkIMContextThai *context_thai) -{ -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - forget_previous_chars (context_thai); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - context_thai->isc_mode = ISC_BASICCHECK; -} - -GtkIMContext * -gtk_im_context_thai_new (void) -{ - GtkIMContextThai *result; - - result = GTK_IM_CONTEXT_THAI (g_object_new (GTK_TYPE_IM_CONTEXT_THAI, NULL)); - - return GTK_IM_CONTEXT (result); -} - -GtkIMContextThaiISCMode -gtk_im_context_thai_get_isc_mode (GtkIMContextThai *context_thai) -{ - return context_thai->isc_mode; -} - -GtkIMContextThaiISCMode -gtk_im_context_thai_set_isc_mode (GtkIMContextThai *context_thai, - GtkIMContextThaiISCMode mode) -{ - GtkIMContextThaiISCMode prev_mode = context_thai->isc_mode; - context_thai->isc_mode = mode; - return prev_mode; -} - -static gboolean -is_context_lost_key(guint keyval) -{ - return ((keyval & 0xFF00) == 0xFF00) && - (keyval == GDK_KEY_BackSpace || - keyval == GDK_KEY_Tab || - keyval == GDK_KEY_Linefeed || - keyval == GDK_KEY_Clear || - keyval == GDK_KEY_Return || - keyval == GDK_KEY_Pause || - keyval == GDK_KEY_Scroll_Lock || - keyval == GDK_KEY_Sys_Req || - keyval == GDK_KEY_Escape || - keyval == GDK_KEY_Delete || - (GDK_KEY_Home <= keyval && keyval <= GDK_KEY_Begin) || /* IsCursorkey */ - (GDK_KEY_KP_Space <= keyval && keyval <= GDK_KEY_KP_Delete) || /* IsKeypadKey, non-chars only */ - (GDK_KEY_Select <= keyval && keyval <= GDK_KEY_Break) || /* IsMiscFunctionKey */ - (GDK_KEY_F1 <= keyval && keyval <= GDK_KEY_F35)); /* IsFunctionKey */ -} - -static gboolean -is_context_intact_key(guint keyval) -{ - return (((keyval & 0xFF00) == 0xFF00) && - ((GDK_KEY_Shift_L <= keyval && keyval <= GDK_KEY_Hyper_R) || /* IsModifierKey */ - (keyval == GDK_KEY_Mode_switch) || - (keyval == GDK_KEY_Num_Lock))) || - (((keyval & 0xFE00) == 0xFE00) && - (GDK_KEY_ISO_Lock <= keyval && keyval <= GDK_KEY_ISO_Last_Group_Lock)); -} - -static gboolean -thai_is_accept (gunichar new_char, gunichar prev_char, gint isc_mode) -{ - switch (isc_mode) - { - case ISC_PASSTHROUGH: - return TRUE; - - case ISC_BASICCHECK: - return TAC_compose_input (prev_char, new_char) != 'R'; - - case ISC_STRICT: - { - int op = TAC_compose_input (prev_char, new_char); - return op != 'R' && op != 'S'; - } - - default: - return FALSE; - } -} - -#define thai_is_composible(n,p) (TAC_compose_input ((p), (n)) == 'C') - -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK -static void -forget_previous_chars (GtkIMContextThai *context_thai) -{ - memset (context_thai->char_buff, 0, sizeof (context_thai->char_buff)); -} - -static void -remember_previous_char (GtkIMContextThai *context_thai, gunichar new_char) -{ - memmove (context_thai->char_buff + 1, context_thai->char_buff, - (GTK_IM_CONTEXT_THAI_BUFF_SIZE - 1) * sizeof (context_thai->char_buff[0])); - context_thai->char_buff[0] = new_char; -} -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - -static gunichar -get_previous_char (GtkIMContextThai *context_thai, gint offset) -{ - gchar *surrounding; - gint cursor_index; - - if (gtk_im_context_get_surrounding ((GtkIMContext *)context_thai, - &surrounding, &cursor_index)) - { - gunichar prev_char; - gchar *p, *q; - - prev_char = 0; - p = surrounding + cursor_index; - for (q = p; offset < 0 && q > surrounding; ++offset) - q = g_utf8_prev_char (q); - if (offset == 0) - { - prev_char = g_utf8_get_char_validated (q, p - q); - if (prev_char == (gunichar)-1 || prev_char == (gunichar)-2) - prev_char = 0; - } - g_free (surrounding); - return prev_char; - } -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - else - { - offset = -offset - 1; - if (0 <= offset && offset < GTK_IM_CONTEXT_THAI_BUFF_SIZE) - return context_thai->char_buff[offset]; - } -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - - return 0; -} - -static gboolean -gtk_im_context_thai_commit_chars (GtkIMContextThai *context_thai, - gunichar *s, gsize len) -{ - gchar *utf8; - - utf8 = g_ucs4_to_utf8 (s, len, NULL, NULL, NULL); - if (!utf8) - return FALSE; - - g_signal_emit_by_name (context_thai, "commit", utf8); - - g_free (utf8); - return TRUE; -} - -static gboolean -accept_input (GtkIMContextThai *context_thai, gunichar new_char) -{ -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - remember_previous_char (context_thai, new_char); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - - return gtk_im_context_thai_commit_chars (context_thai, &new_char, 1); -} - -static gboolean -reorder_input (GtkIMContextThai *context_thai, - gunichar prev_char, gunichar new_char) -{ - gunichar buf[2]; - - if (!gtk_im_context_delete_surrounding (GTK_IM_CONTEXT (context_thai), -1, 1)) - return FALSE; - -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - forget_previous_chars (context_thai); - remember_previous_char (context_thai, new_char); - remember_previous_char (context_thai, prev_char); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - - buf[0] = new_char; - buf[1] = prev_char; - return gtk_im_context_thai_commit_chars (context_thai, buf, 2); -} - -static gboolean -replace_input (GtkIMContextThai *context_thai, gunichar new_char) -{ - if (!gtk_im_context_delete_surrounding (GTK_IM_CONTEXT (context_thai), -1, 1)) - return FALSE; - -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - forget_previous_chars (context_thai); - remember_previous_char (context_thai, new_char); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - - return gtk_im_context_thai_commit_chars (context_thai, &new_char, 1); -} - -static gboolean -gtk_im_context_thai_filter_keypress (GtkIMContext *context, - GdkEventKey *event) -{ - GtkIMContextThai *context_thai = GTK_IM_CONTEXT_THAI (context); - gunichar prev_char, new_char; - gboolean is_reject; - GtkIMContextThaiISCMode isc_mode; - GdkModifierType state; - guint keyval; - - if (gdk_event_get_event_type ((GdkEvent *) event) != GDK_KEY_PRESS || - !gdk_event_get_state ((GdkEvent *) event, &state) || - !gdk_event_get_keyval ((GdkEvent *) event, &keyval)) - return FALSE; - - if (state & (GDK_MODIFIER_MASK - & ~(GDK_SHIFT_MASK | GDK_LOCK_MASK | GDK_MOD2_MASK)) || - is_context_lost_key (keyval)) - { -#ifndef GTK_IM_CONTEXT_THAI_NO_FALLBACK - forget_previous_chars (context_thai); -#endif /* !GTK_IM_CONTEXT_THAI_NO_FALLBACK */ - return FALSE; - } - if (keyval == 0 || is_context_intact_key (keyval)) - { - return FALSE; - } - - prev_char = get_previous_char (context_thai, -1); - if (!prev_char) - prev_char = ' '; - new_char = gdk_keyval_to_unicode (keyval); - is_reject = TRUE; - isc_mode = gtk_im_context_thai_get_isc_mode (context_thai); - if (thai_is_accept (new_char, prev_char, isc_mode)) - { - accept_input (context_thai, new_char); - is_reject = FALSE; - } - else - { - gunichar context_char; - - /* rejected, trying to correct */ - context_char = get_previous_char (context_thai, -2); - if (context_char) - { - if (thai_is_composible (new_char, context_char)) - { - if (thai_is_composible (prev_char, new_char)) - is_reject = !reorder_input (context_thai, prev_char, new_char); - else if (thai_is_composible (prev_char, context_char)) - is_reject = !replace_input (context_thai, new_char); - else if ((TAC_char_class (prev_char) == FV1 - || TAC_char_class (prev_char) == AM) - && TAC_char_class (new_char) == TONE) - is_reject = !reorder_input (context_thai, prev_char, new_char); - } - else if (thai_is_accept (new_char, context_char, isc_mode)) - is_reject = !replace_input (context_thai, new_char); - } - } - if (is_reject) - { - /* reject character */ - gdk_display_beep (gdk_event_get_display ((GdkEvent*)event)); - } - return TRUE; -} - |