5 #include "chimara-glk-private.h"
8 extern GPrivate *glk_data_key;
10 /* Forward declarations */
11 static int finish_text_buffer_line_input(winid_t win, gboolean emit_signal);
12 static int finish_text_grid_line_input(winid_t win, gboolean emit_signal);
13 static void cancel_old_input_request(winid_t win);
15 /* Internal function: code common to both flavors of char event request */
17 request_char_event_common(winid_t win, gboolean unicode)
19 VALID_WINDOW(win, return);
20 g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
22 cancel_old_input_request(win);
24 flush_window_buffer(win);
26 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
28 win->input_request_type = unicode? INPUT_REQUEST_CHARACTER_UNICODE : INPUT_REQUEST_CHARACTER;
29 g_signal_handler_unblock( win->widget, win->char_input_keypress_handler );
32 gtk_widget_grab_focus( GTK_WIDGET(win->widget) );
35 /* Emit the "waiting" signal to let listeners know we are ready for input */
36 g_signal_emit_by_name(glk_data->self, "waiting");
40 * glk_request_char_event:
41 * @win: A window to request char events from.
43 * Request input of a Latin-1 character or special key. A window cannot have
44 * requests for both character and line input at the same time. Nor can it have
45 * requests for character input of both types (Latin-1 and Unicode). It is
46 * illegal to call glk_request_char_event() if the window already has a pending
47 * request for either character or line input.
50 glk_request_char_event(winid_t win)
52 request_char_event_common(win, FALSE);
56 * glk_request_char_event_uni:
57 * @win: A window to request char events from.
59 * Request input of a Unicode character or special key. See
60 * glk_request_char_event().
63 glk_request_char_event_uni(winid_t win)
65 request_char_event_common(win, TRUE);
69 * glk_cancel_char_event:
70 * @win: A window to cancel the latest char event request on.
72 * This cancels a pending request for character input. (Either Latin-1 or
73 * Unicode.) For convenience, it is legal to call glk_cancel_char_event() even
74 * if there is no charcter input request on that window. Glk will ignore the
78 glk_cancel_char_event(winid_t win)
80 VALID_WINDOW(win, return);
81 g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
83 if(win->input_request_type == INPUT_REQUEST_CHARACTER || win->input_request_type == INPUT_REQUEST_CHARACTER_UNICODE)
85 win->input_request_type = INPUT_REQUEST_NONE;
86 g_signal_handler_block( win->widget, win->char_input_keypress_handler );
90 /* Internal function: Request either latin-1 or unicode line input, in a text grid window. */
92 text_grid_request_line_event_common(winid_t win, glui32 maxlen, gboolean insert, gchar *inserttext)
96 GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
98 GtkTextMark *cursor = gtk_text_buffer_get_mark(buffer, "cursor_position");
99 GtkTextIter start_iter, end_iter;
100 gtk_text_buffer_get_iter_at_mark(buffer, &start_iter, cursor);
102 /* Determine the maximum length of the line input */
103 gint cursorpos = gtk_text_iter_get_line_offset(&start_iter);
104 /* Odd; the Glk spec says the maximum input length is
105 windowwidth - 1 - cursorposition. I say no, because if cursorposition is
106 zero, then the input should fill the whole line. FIXME??? */
107 win->input_length = MIN(win->width - cursorpos, win->line_input_buffer_max_len);
108 end_iter = start_iter;
109 gtk_text_iter_set_line_offset(&end_iter, cursorpos + win->input_length);
111 /* If the buffer currently has a selection with one bound in the middle of
112 the input field, then deselect it. Otherwise the input field gets trashed */
113 GtkTextIter start_sel, end_sel;
114 if( gtk_text_buffer_get_selection_bounds(buffer, &start_sel, &end_sel) )
116 if( gtk_text_iter_in_range(&start_sel, &start_iter, &end_iter) )
117 gtk_text_buffer_place_cursor(buffer, &end_sel);
118 if( gtk_text_iter_in_range(&end_sel, &start_iter, &end_iter) )
119 gtk_text_buffer_place_cursor(buffer, &start_sel);
122 /* Erase the text currently in the input field and replace it with a GtkEntry */
123 gtk_text_buffer_delete(buffer, &start_iter, &end_iter);
124 win->input_anchor = gtk_text_buffer_create_child_anchor(buffer, &start_iter);
125 win->input_entry = gtk_entry_new();
126 /* Set the entry's font to match that of the window */
127 GtkRcStyle *style = gtk_widget_get_modifier_style(win->widget); /* Don't free */
128 gtk_widget_modify_font(win->input_entry, style->font_desc);
129 /* Make the entry as small as possible to fit with the text */
130 gtk_entry_set_has_frame(GTK_ENTRY(win->input_entry), FALSE);
131 GtkBorder border = { 0, 0, 0, 0 };
134 #if GTK_CHECK_VERSION(2,10,0)
135 gtk_entry_set_inner_border(GTK_ENTRY(win->input_entry), &border);
137 gtk_entry_set_max_length(GTK_ENTRY(win->input_entry), win->input_length);
138 gtk_entry_set_width_chars(GTK_ENTRY(win->input_entry), win->input_length);
140 /* Insert pre-entered text if needed */
142 gtk_entry_set_text(GTK_ENTRY(win->input_entry), inserttext);
144 /* Set background color of entry (TODO: implement as property) */
146 gdk_color_parse("grey", &background);
147 gtk_widget_modify_base(win->input_entry, GTK_STATE_NORMAL, &background);
149 g_signal_connect(win->input_entry, "activate", G_CALLBACK(on_input_entry_activate), win);
150 g_signal_connect(win->input_entry, "key-press-event", G_CALLBACK(on_input_entry_key_press_event), win);
151 win->line_input_entry_changed = g_signal_connect(win->input_entry, "changed", G_CALLBACK(on_input_entry_changed), win);
153 gtk_widget_show(win->input_entry);
154 gtk_text_view_add_child_at_anchor(GTK_TEXT_VIEW(win->widget), win->input_entry, win->input_anchor);
156 gtk_widget_grab_focus(win->input_entry);
161 /* Internal function: Request either latin-1 or unicode line input, in a text buffer window. */
163 text_buffer_request_line_event_common(winid_t win, glui32 maxlen, gboolean insert, gchar *inserttext)
165 flush_window_buffer(win);
169 GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
171 /* Move the input_position mark to the end of the window_buffer */
172 GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
173 GtkTextIter end_iter;
174 gtk_text_buffer_get_end_iter(buffer, &end_iter);
175 gtk_text_buffer_move_mark(buffer, input_position, &end_iter);
177 /* Set the entire contents of the window_buffer as uneditable
178 * (so input can only be entered at the end) */
179 GtkTextIter start_iter;
180 gtk_text_buffer_get_start_iter(buffer, &start_iter);
181 gtk_text_buffer_remove_tag_by_name(buffer, "uneditable", &start_iter, &end_iter);
182 gtk_text_buffer_apply_tag_by_name(buffer, "uneditable", &start_iter, &end_iter);
184 /* Insert pre-entered text if needed */
186 gtk_text_buffer_insert(buffer, &end_iter, inserttext, -1);
187 gtk_text_buffer_get_end_iter(buffer, &end_iter); /* update after text insertion */
190 /* Apply the correct style to the input prompt */
191 GtkTextIter input_iter;
192 gtk_text_buffer_get_iter_at_mark(buffer, &input_iter, input_position);
193 gtk_text_buffer_apply_tag_by_name(buffer, "input", &input_iter, &end_iter);
195 gtk_text_view_set_editable(GTK_TEXT_VIEW(win->widget), TRUE);
197 g_signal_handler_unblock(buffer, win->insert_text_handler);
198 gtk_widget_grab_focus(win->widget);
204 * glk_request_line_event:
205 * @win: A text buffer or text grid window to request line input on.
206 * @buf: A buffer of at least @maxlen bytes.
207 * @maxlen: Length of the buffer.
208 * @initlen: The number of characters in @buf to pre-enter.
210 * Requests input of a line of Latin-1 characters. A window cannot have requests
211 * for both character and line input at the same time. Nor can it have requests
212 * for line input of both types (Latin-1 and Unicode). It is illegal to call
213 * glk_request_line_event() if the window already has a pending request for
214 * either character or line input.
216 * The @buf argument is a pointer to space where the line input will be stored.
217 * (This may not be %NULL.) @maxlen is the length of this space, in bytes; the
218 * library will not accept more characters than this. If @initlen is nonzero,
219 * then the first @initlen bytes of @buf will be entered as pre-existing input
220 * — just as if the player had typed them himself. (The player can continue
221 * composing after this pre-entered input, or delete it or edit as usual.)
223 * The contents of the buffer are undefined until the input is completed (either
224 * by a line input event, or glk_cancel_line_event(). The library may or may not
225 * fill in the buffer as the player composes, while the input is still pending;
226 * it is illegal to change the contents of the buffer yourself.
229 glk_request_line_event(winid_t win, char *buf, glui32 maxlen, glui32 initlen)
231 VALID_WINDOW(win, return);
232 g_return_if_fail(buf);
233 g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
234 g_return_if_fail(initlen <= maxlen);
236 cancel_old_input_request(win);
238 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
240 /* Register the buffer */
241 if(glk_data->register_arr)
242 win->buffer_rock = (*glk_data->register_arr)(buf, maxlen, "&+#!Cn");
244 win->input_request_type = INPUT_REQUEST_LINE;
245 win->line_input_buffer = buf;
246 win->line_input_buffer_max_len = maxlen;
247 win->echo_current_line_input = win->echo_line_input;
248 win->current_extra_line_terminators = g_slist_copy(win->extra_line_terminators);
250 gchar *inserttext = (initlen > 0)? g_strndup(buf, initlen) : g_strdup("");
253 case wintype_TextBuffer:
254 text_buffer_request_line_event_common(win, maxlen, (initlen > 0), inserttext);
256 case wintype_TextGrid:
257 text_grid_request_line_event_common(win, maxlen, (initlen > 0), inserttext);
261 g_signal_handler_unblock(win->widget, win->line_input_keypress_handler);
263 /* Emit the "waiting" signal to let listeners know we are ready for input */
264 g_signal_emit_by_name(glk_data->self, "waiting");
268 * glk_request_line_event_uni:
269 * @win: A text buffer or text grid window to request line input on.
270 * @buf: A buffer of at least @maxlen characters.
271 * @maxlen: Length of the buffer.
272 * @initlen: The number of characters in @buf to pre-enter.
274 * Request input of a line of Unicode characters. This works the same as
275 * glk_request_line_event(), except the result is stored in an array of
276 * <type>glui32</type> values instead of an array of characters, and the values
277 * may be any valid Unicode code points.
279 * If possible, the library should return fully composed Unicode characters,
280 * rather than strings of base and composition characters.
283 * Fully-composed characters are the norm for Unicode text, so an
284 * implementation that ignores this issue will probably produce the right
285 * result. However, the game may not want to rely on that. Another factor is
286 * that case-folding can (occasionally) produce non-normalized text.
287 * Therefore, to cover all its bases, a game should call
288 * glk_buffer_to_lower_case_uni(), followed by
289 * glk_buffer_canon_normalize_uni(), before parsing.
293 * Earlier versions of this spec said that line input must always be in
294 * Unicode Normalization Form C. However, this has not been universally
295 * implemented. It is also somewhat redundant, for the results noted above.
296 * Therefore, we now merely recommend that line input be fully composed. The
297 * game is ultimately responsible for all case-folding and normalization. See
298 * <link linkend="chimara-Unicode-String-Normalization">Unicode String
299 * Normalization</link>.
303 glk_request_line_event_uni(winid_t win, glui32 *buf, glui32 maxlen, glui32 initlen)
305 VALID_WINDOW(win, return);
306 g_return_if_fail(buf);
307 g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
308 g_return_if_fail(initlen <= maxlen);
310 cancel_old_input_request(win);
311 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
313 /* Register the buffer */
314 if(glk_data->register_arr)
315 win->buffer_rock = (*glk_data->register_arr)(buf, maxlen, "&+#!Iu");
317 win->input_request_type = INPUT_REQUEST_LINE_UNICODE;
318 win->line_input_buffer_unicode = buf;
319 win->line_input_buffer_max_len = maxlen;
320 win->echo_current_line_input = win->echo_line_input;
321 win->current_extra_line_terminators = g_slist_copy(win->extra_line_terminators);
325 utf8 = convert_ucs4_to_utf8(buf, initlen);
334 case wintype_TextBuffer:
335 text_buffer_request_line_event_common(win, maxlen, (initlen > 0), utf8);
337 case wintype_TextGrid:
338 text_grid_request_line_event_common(win, maxlen, (initlen > 0), utf8);
341 g_signal_handler_unblock(win->widget, win->line_input_keypress_handler);
344 /* Emit the "waiting" signal to let listeners know we are ready for input */
345 g_signal_emit_by_name(glk_data->self, "waiting");
349 * glk_cancel_line_event:
350 * @win: A text buffer or text grid window to cancel line input on.
351 * @event: Will be filled in if the user had already input something.
353 * This cancels a pending request for line input. (Either Latin-1 or Unicode.)
355 * The event pointed to by the event argument will be filled in as if the
356 * player had hit <keycap>enter</keycap>, and the input composed so far will be
357 * stored in the buffer; see below. If you do not care about this information,
358 * pass %NULL as the @event argument. (The buffer will still be filled.)
360 * For convenience, it is legal to call glk_cancel_line_event() even if there
361 * is no line input request on that window. The event type will be set to
362 * %evtype_None in this case.
365 glk_cancel_line_event(winid_t win, event_t *event)
367 VALID_WINDOW(win, return);
368 g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
371 event->type = evtype_None;
377 if(win->input_request_type != INPUT_REQUEST_LINE && win->input_request_type != INPUT_REQUEST_LINE_UNICODE)
380 g_signal_handler_block( win->widget, win->line_input_keypress_handler );
382 int chars_written = 0;
385 if(win->type == wintype_TextGrid) {
386 chars_written = finish_text_grid_line_input(win, FALSE);
387 } else if(win->type == wintype_TextBuffer) {
388 gtk_text_view_set_editable( GTK_TEXT_VIEW(win->widget), FALSE );
389 GtkTextBuffer *window_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
390 g_signal_handler_block(window_buffer, win->insert_text_handler);
391 chars_written = finish_text_buffer_line_input(win, FALSE);
395 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
396 if(glk_data->unregister_arr)
398 if(win->input_request_type == INPUT_REQUEST_LINE_UNICODE)
399 (*glk_data->unregister_arr)(win->line_input_buffer_unicode, win->line_input_buffer_max_len, "&+#!Iu", win->buffer_rock);
401 (*glk_data->unregister_arr)(win->line_input_buffer, win->line_input_buffer_max_len, "&+#!Cn", win->buffer_rock);
404 if(event != NULL && chars_written > 0) {
405 event->type = evtype_LineInput;
406 event->val1 = chars_written;
410 /* Helper function: Turn off shutdown key-press-event signal handler */
412 turn_off_handler(GNode *node)
414 winid_t win = node->data;
415 g_signal_handler_block(win->widget, win->shutdown_keypress_handler);
416 return FALSE; /* don't stop */
419 /* Internal function: Callback for signal key-press-event while waiting for shutdown. */
421 on_shutdown_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win)
423 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(widget, CHIMARA_TYPE_GLK));
425 CHIMARA_GLK_USE_PRIVATE(glk, priv);
427 /* Turn off all the signal handlers */
428 if(priv->root_window)
429 g_node_traverse(priv->root_window, G_IN_ORDER, G_TRAVERSE_LEAVES, -1, (GNodeTraverseFunc)turn_off_handler, NULL);
431 /* Signal the Glk library that it can shut everything down now */
432 g_mutex_lock(priv->shutdown_lock);
433 g_cond_signal(priv->shutdown_key_pressed);
434 g_mutex_unlock(priv->shutdown_lock);
436 return TRUE; /* block the event */
439 /* Internal function: General callback for signal key-press-event on a text buffer or text grid window. Used in character input on both text buffers and grids. Blocked when not in use. */
441 on_char_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win)
443 /* Ignore modifier keys, otherwise the char input will already trigger on
444 the shift key when the user tries to type a capital letter */
445 if(event->is_modifier)
446 return FALSE; /* don't stop the event */
448 /* All text up to the input position is now regarded as being read by the user */
449 if(win->type == wintype_TextBuffer)
452 glui32 keycode = keyval_to_glk_keycode(event->keyval, win->input_request_type == INPUT_REQUEST_CHARACTER_UNICODE);
454 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(widget, CHIMARA_TYPE_GLK));
456 event_throw(glk, evtype_CharInput, win, keycode, 0);
457 g_signal_emit_by_name(glk, "char-input", win->rock, event->keyval);
459 /* Only one keypress will be handled */
460 win->input_request_type = INPUT_REQUEST_NONE;
461 g_signal_handler_block(win->widget, win->char_input_keypress_handler);
467 on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win)
471 case wintype_TextBuffer:
473 /* All text up to the input position is now regarded as being read by the user */
476 GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
478 /* History up/down */
479 if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
480 || event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
482 /* Prevent falling off the end of the history list */
483 if(win->history == NULL)
485 if( (event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
486 && win->history_pos && win->history_pos->next == NULL)
488 if( (event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
489 && (win->history_pos == NULL || win->history_pos->prev == NULL) )
492 GtkTextIter start, end;
493 /* Erase any text that was already typed */
494 GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
495 gtk_text_buffer_get_iter_at_mark(buffer, &start, input_position);
496 gtk_text_buffer_get_end_iter(buffer, &end);
498 if(win->history_pos == NULL) {
499 gchar *current_input = gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
500 win->history = g_list_prepend(win->history, current_input);
501 win->history_pos = win->history;
504 gtk_text_buffer_delete(buffer, &start, &end);
506 if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
509 win->history_pos = g_list_next(win->history_pos);
511 win->history_pos = win->history;
514 win->history_pos = g_list_previous(win->history_pos);
516 /* Insert the history item into the window */
517 gtk_text_buffer_get_end_iter(buffer, &end);
519 g_signal_handler_block(buffer, win->insert_text_handler);
520 gtk_text_buffer_insert_with_tags_by_name(buffer, &end, win->history_pos->data, -1, "default", "input", NULL);
521 g_signal_handler_unblock(buffer, win->insert_text_handler);
525 /* Move to beginning/end of input field */
526 else if(event->keyval == GDK_Home) {
527 GtkTextIter input_iter;
528 GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
529 gtk_text_buffer_get_iter_at_mark(buffer, &input_iter, input_position);
530 gtk_text_buffer_place_cursor(buffer, &input_iter);
533 else if(event->keyval == GDK_End) {
534 GtkTextIter end_iter;
535 gtk_text_buffer_get_end_iter(buffer, &end_iter);
536 gtk_text_buffer_place_cursor(buffer, &end_iter);
540 /* Handle the line terminators */
541 else if(event->keyval == GDK_Return || event->keyval == GDK_KP_Enter
542 || g_slist_find(win->current_extra_line_terminators, GUINT_TO_POINTER(event->keyval)))
544 /* Remove signal handlers */
545 g_signal_handler_block(buffer, win->insert_text_handler);
546 g_signal_handler_block(win->widget, win->line_input_keypress_handler);
548 /* Insert a newline (even if line input was terminated with a different key */
550 gtk_text_buffer_get_end_iter(buffer, &end);
551 gtk_text_buffer_insert(buffer, &end, "\n", 1);
553 /* Make the window uneditable again and retrieve the text that was input */
554 gtk_text_view_set_editable(GTK_TEXT_VIEW(win->widget), FALSE);
556 int chars_written = finish_text_buffer_line_input(win, TRUE);
557 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
558 event_throw(glk, evtype_LineInput, win, chars_written, 0);
564 /* If this is a text grid window, then redirect the key press to the line input GtkEntry */
565 case wintype_TextGrid:
567 if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
568 || event->keyval == GDK_Down || event->keyval == GDK_KP_Down
569 || event->keyval == GDK_Left || event->keyval == GDK_KP_Left
570 || event->keyval == GDK_Right || event->keyval == GDK_KP_Right
571 || event->keyval == GDK_Tab || event->keyval == GDK_KP_Tab
572 || event->keyval == GDK_Page_Up || event->keyval == GDK_KP_Page_Up
573 || event->keyval == GDK_Page_Down || event->keyval == GDK_KP_Page_Down
574 || event->keyval == GDK_Home || event->keyval == GDK_KP_Home
575 || event->keyval == GDK_End || event->keyval == GDK_KP_End)
576 return FALSE; /* Don't redirect these keys */
577 gtk_widget_grab_focus(win->input_entry);
578 gtk_editable_set_position(GTK_EDITABLE(win->input_entry), -1);
579 gboolean retval = TRUE;
580 g_signal_emit_by_name(win->input_entry, "key-press-event", event, &retval);
581 return retval; /* Block this key event if the entry handled it */
587 /* Internal function: finish handling a line input request, for both text grid and text buffer windows. */
589 write_to_window_buffer(winid_t win, const gchar *inserted_text)
593 /* Convert the string from UTF-8 to Latin-1 or Unicode */
594 if(win->input_request_type == INPUT_REQUEST_LINE)
597 gchar *latin1 = convert_utf8_to_latin1(inserted_text, &bytes_written);
602 /* Place input in the echo stream */
603 if(win->echo_stream != NULL)
604 glk_put_string_stream(win->echo_stream, latin1);
606 /* Copy the string (bytes_written does not include the NULL at the end) */
607 copycount = MIN(win->line_input_buffer_max_len, bytes_written);
608 memcpy(win->line_input_buffer, latin1, copycount);
611 else if(win->input_request_type == INPUT_REQUEST_LINE_UNICODE)
614 gunichar *unicode = convert_utf8_to_ucs4(inserted_text, &items_written);
619 /* Place input in the echo stream */
620 if(win->echo_stream != NULL)
621 glk_put_string_stream_uni(win->echo_stream, unicode);
623 /* Copy the string (but not the NULL at the end) */
624 copycount = MIN(win->line_input_buffer_max_len, items_written);
625 memcpy(win->line_input_buffer_unicode, unicode, copycount * sizeof(gunichar));
629 WARNING("Wrong input request type");
631 win->input_request_type = INPUT_REQUEST_NONE;
635 /* Internal function: Retrieves the input of a TextBuffer window and stores it in the window buffer.
636 * Returns the number of characters written, suitable for inclusion in a line input event. */
638 finish_text_buffer_line_input(winid_t win, gboolean emit_signal)
640 VALID_WINDOW(win, return 0);
641 g_return_val_if_fail(win->type == wintype_TextBuffer, 0);
643 GtkTextIter start_iter, end_iter;
645 GtkTextBuffer *window_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
646 GtkTextMark *input_position = gtk_text_buffer_get_mark(window_buffer, "input_position");
647 gtk_text_buffer_get_iter_at_mark(window_buffer, &start_iter, input_position);
648 gtk_text_buffer_get_end_iter(window_buffer, &end_iter);
650 gchar *inserted_text = gtk_text_buffer_get_text(window_buffer, &start_iter, &end_iter, FALSE);
652 /* If echoing is turned off, remove the text from the window */
653 if(!win->echo_current_line_input)
654 gtk_text_buffer_delete(window_buffer, &start_iter, &end_iter);
656 /* Don't include the newline in the input */
657 char *last_char = inserted_text + strlen(inserted_text) - 1;
658 if(*last_char == '\n')
661 int chars_written = write_to_window_buffer(win, inserted_text);
664 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
666 g_signal_emit_by_name(glk, "line-input", win->rock, inserted_text);
669 /* Add the text to the window input history */
670 if(win->history_pos != NULL)
672 g_free(win->history->data);
673 win->history = g_list_delete_link(win->history, win->history);
675 if(*inserted_text != 0)
676 win->history = g_list_prepend(win->history, g_strdup(inserted_text));
678 win->history_pos = NULL;
680 g_free(inserted_text);
682 return chars_written;
685 /* Internal function: Retrieves the input of a TextGrid window and stores it in the window buffer.
686 * Returns the number of characters written, suitable for inclusion in a line input event. */
688 finish_text_grid_line_input(winid_t win, gboolean emit_signal)
690 VALID_WINDOW(win, return 0);
691 g_return_val_if_fail(win->type == wintype_TextGrid, 0);
693 GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
695 gchar *text = g_strdup( gtk_entry_get_text(GTK_ENTRY(win->input_entry)) );
696 /* Move the focus back into the text view */
697 gtk_widget_grab_focus(win->widget);
698 /* Remove entry widget from text view */
699 /* Should be ok even though this is the widget's own signal handler */
700 gtk_container_remove( GTK_CONTAINER(win->widget), GTK_WIDGET(win->input_entry) );
701 win->input_entry = NULL;
702 /* Delete the child anchor */
703 GtkTextIter start, end;
704 gtk_text_buffer_get_iter_at_child_anchor(buffer, &start, win->input_anchor);
706 gtk_text_iter_forward_char(&end); /* Point after the child anchor */
707 gtk_text_buffer_delete(buffer, &start, &end);
708 win->input_anchor = NULL;
710 gchar *spaces = g_strnfill(win->input_length - g_utf8_strlen(text, -1), ' ');
711 gchar *text_to_insert = g_strconcat(text, spaces, NULL);
713 gtk_text_buffer_insert(buffer, &start, text_to_insert, -1);
714 g_free(text_to_insert);
716 int chars_written = write_to_window_buffer(win, text);
719 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
721 g_signal_emit_by_name(glk, "line-input", win->rock, text);
724 /* Add the text to the window input history */
725 if(win->history_pos != NULL)
727 g_free(win->history->data);
728 win->history = g_list_delete_link(win->history, win->history);
731 win->history = g_list_prepend(win->history, g_strdup(text));
732 win->history_pos = NULL;
735 return chars_written;
738 /* Internal function: Callback for signal insert-text on a text buffer window.
739 Runs after the default handler has already inserted the text. */
741 after_window_insert_text(GtkTextBuffer *textbuffer, GtkTextIter *location, gchar *text, gint len, winid_t win)
743 GtkTextBuffer *window_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
745 /* Set the history position to NULL and erase the text we were already editing */
746 if(win->history_pos != NULL)
748 g_free(win->history->data);
749 win->history = g_list_delete_link(win->history, win->history);
750 win->history_pos = NULL;
753 /* Apply the 'input' style to the text that was entered */
754 GtkTextIter end_iter;
755 gtk_text_buffer_get_end_iter(window_buffer, &end_iter);
756 GtkTextIter input_iter;
757 GtkTextMark *input_position = gtk_text_buffer_get_mark(window_buffer, "input_position");
758 gtk_text_buffer_get_iter_at_mark(window_buffer, &input_iter, input_position);
759 gtk_text_buffer_apply_tag_by_name(window_buffer, "input", &input_iter, &end_iter);
762 /* Internal function: Callback for signal activate on the line input GtkEntry
763 in a text grid window. */
765 on_input_entry_activate(GtkEntry *input_entry, winid_t win)
767 g_signal_handler_block(win->widget, win->line_input_keypress_handler);
769 int chars_written = finish_text_grid_line_input(win, TRUE);
770 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
771 event_throw(glk, evtype_LineInput, win, chars_written, 0);
774 /* Internal function: Callback for signal key-press-event on the line input
775 GtkEntry in a text grid window. */
777 on_input_entry_key_press_event(GtkEntry *input_entry, GdkEventKey *event, winid_t win)
779 if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
780 || event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
782 /* Prevent falling off the end of the history list */
783 if( (event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
784 && win->history_pos && win->history_pos->next == NULL)
786 if( (event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
787 && (win->history_pos == NULL || win->history_pos->prev == NULL) )
790 if(win->history_pos == NULL)
792 const gchar *current_input = gtk_entry_get_text(input_entry);
793 win->history = g_list_prepend(win->history, g_strdup(current_input));
794 win->history_pos = win->history;
797 if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
800 win->history_pos = g_list_next(win->history_pos);
802 win->history_pos = win->history;
805 win->history_pos = g_list_previous(win->history_pos);
807 /* Insert the history item into the window */
808 g_signal_handler_block(input_entry, win->line_input_entry_changed);
809 gtk_entry_set_text(input_entry, win->history_pos->data);
810 g_signal_handler_unblock(input_entry, win->line_input_entry_changed);
817 on_input_entry_changed(GtkEditable *editable, winid_t win)
819 /* Set the history position to NULL and erase the text we were already editing */
820 if(win->history_pos != NULL)
822 g_free(win->history->data);
823 win->history = g_list_delete_link(win->history, win->history);
824 win->history_pos = NULL;
829 keyval_to_glk_keycode(guint keyval, gboolean unicode)
834 case GDK_KP_Up: return keycode_Up;
836 case GDK_KP_Down: return keycode_Down;
838 case GDK_KP_Left: return keycode_Left;
840 case GDK_KP_Right: return keycode_Right;
843 case GDK_KP_Enter: return keycode_Return;
846 case GDK_KP_Delete: return keycode_Delete;
847 case GDK_Escape: return keycode_Escape;
849 case GDK_KP_Tab: return keycode_Tab;
851 case GDK_KP_Page_Up: return keycode_PageUp;
853 case GDK_KP_Page_Down: return keycode_PageDown;
855 case GDK_KP_Home: return keycode_Home;
857 case GDK_KP_End: return keycode_End;
859 case GDK_KP_F1: return keycode_Func1;
861 case GDK_KP_F2: return keycode_Func2;
863 case GDK_KP_F3: return keycode_Func3;
865 case GDK_KP_F4: return keycode_Func4;
866 case GDK_F5: return keycode_Func5;
867 case GDK_F6: return keycode_Func6;
868 case GDK_F7: return keycode_Func7;
869 case GDK_F8: return keycode_Func8;
870 case GDK_F9: return keycode_Func9;
871 case GDK_F10: return keycode_Func10;
872 case GDK_F11: return keycode_Func11;
873 case GDK_F12: return keycode_Func12;
875 keycode = gdk_keyval_to_unicode(keyval);
876 /* If keycode is 0, then keyval was not recognized; also return
877 unknown if Latin-1 input was requested and the character is not in
879 if(keycode == 0 || (!unicode && keycode > 255))
880 return keycode_Unknown;
886 force_char_input_from_queue(winid_t win, event_t *event)
888 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
889 guint keyval = GPOINTER_TO_UINT(g_async_queue_pop(glk_data->char_input_queue));
891 glk_cancel_char_event(win);
894 ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
896 g_signal_emit_by_name(glk, "char-input", win->rock, keyval);
899 event->type = evtype_CharInput;
901 event->val1 = keyval_to_glk_keycode(keyval, win->input_request_type == INPUT_REQUEST_CHARACTER_UNICODE);
906 force_line_input_from_queue(winid_t win, event_t *event)
908 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
909 const gchar *text = g_async_queue_pop(glk_data->line_input_queue);
910 glui32 chars_written = 0;
913 if(win->type == wintype_TextBuffer)
915 GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
916 GtkTextIter start, end;
918 /* Remove signal handlers so the line input doesn't get picked up again */
919 g_signal_handler_block(buffer, win->insert_text_handler);
920 g_signal_handler_block(win->widget, win->line_input_keypress_handler);
922 /* Erase any text that was already typed */
923 GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
924 gtk_text_buffer_get_iter_at_mark(buffer, &start, input_position);
925 gtk_text_buffer_get_end_iter(buffer, &end);
926 gtk_text_buffer_delete(buffer, &start, &end);
928 /* Make the window uneditable again */
929 gtk_text_view_set_editable(GTK_TEXT_VIEW(win->widget), FALSE);
931 /* Insert the forced input into the window */
932 if(win->echo_current_line_input)
934 gtk_text_buffer_get_end_iter(buffer, &end);
935 gchar *text_to_insert = g_strconcat(text, "\n", NULL);
936 gtk_text_buffer_insert_with_tags_by_name(buffer, &end, text_to_insert, -1, "default", "input", NULL);
939 chars_written = finish_text_buffer_line_input(win, TRUE);
941 else if(win->type == wintype_TextGrid)
943 /* Remove signal handlers so the line input doesn't get picked up again */
944 g_signal_handler_block(win->widget, win->char_input_keypress_handler);
946 /* Insert the forced input into the window */
947 gtk_entry_set_text(GTK_ENTRY(win->input_entry), text);
948 chars_written = finish_text_grid_line_input(win, TRUE);
952 event->type = evtype_LineInput;
954 event->val1 = chars_written;
958 /*** Internal function: cancels any pending input requests on the window and presents a warning if not INPUT_REQUEST_NONE ***/
960 cancel_old_input_request(winid_t win)
962 switch(win->input_request_type) {
963 case INPUT_REQUEST_NONE:
964 break; /* All is well */
965 case INPUT_REQUEST_CHARACTER:
966 case INPUT_REQUEST_CHARACTER_UNICODE:
967 glk_cancel_char_event(win);
968 WARNING("Cancelling pending char event");
970 case INPUT_REQUEST_LINE:
971 case INPUT_REQUEST_LINE_UNICODE:
972 glk_cancel_line_event(win, NULL);
973 WARNING("Cancelling pending line event");
976 WARNING("Could not cancel pending input request: unknown input request");
981 * glk_set_echo_line_event:
982 * @win: The window in which to change the echoing behavior.
983 * @val: Zero to turn off echoing, nonzero for normal echoing.
985 * Normally, after line input is completed or cancelled in a buffer window, the
986 * library ensures that the complete input line (or its latest state, after
987 * cancelling) is displayed at the end of the buffer, followed by a newline.
988 * This call allows you to suppress this behavior. If the @val argument is zero,
989 * all <emphasis>subsequent</emphasis> line input requests in the given window
990 * will leave the buffer unchanged after the input is completed or cancelled;
991 * the player's input will not be printed. If @val is nonzero, subsequent input
992 * requests will have the normal printing behavior.
995 * Note that this feature is unrelated to the window's echo stream.
998 * If you turn off line input echoing, you can reproduce the standard input
999 * behavior by following each line input event (or line input cancellation) by
1000 * printing the input line, in the Input style, followed by a newline in the
1003 * The glk_set_echo_line_event() does not affect a pending line input request.
1004 * It also has no effect in non-buffer windows.
1006 * In a grid window, the game can overwrite the input area at will, so there
1007 * is no need for this distinction.
1010 * Not all libraries support this feature. You can test for it with
1011 * %gestalt_LineInputEcho.
1014 glk_set_echo_line_event(winid_t win, glui32 val)
1016 VALID_WINDOW(win, return);
1018 if(win->type != wintype_TextBuffer)
1019 return; /* Quietly do nothing */
1021 win->echo_line_input = val? TRUE : FALSE;
1024 /* Internal function to convert from a Glk keycode to a GDK keyval. */
1026 keycode_to_gdk_keyval(glui32 keycode)
1038 case keycode_Return:
1040 case keycode_Delete:
1042 case keycode_Escape:
1046 case keycode_PageUp:
1048 case keycode_PageDown:
1049 return GDK_Page_Down;
1072 case keycode_Func10:
1074 case keycode_Func11:
1076 case keycode_Func12:
1079 return GDK_BackSpace;
1081 unsigned keyval = gdk_unicode_to_keyval(keycode);
1082 if(keyval < 0x01000000) /* magic number meaning illegal unicode point */
1087 /* Internal function to decide whether @keycode is a valid line terminator. */
1089 is_valid_line_terminator(glui32 keycode)
1092 case keycode_Escape:
1102 case keycode_Func10:
1103 case keycode_Func11:
1104 case keycode_Func12:
1111 * glk_set_terminators_line_event:
1112 * @win: The window for which to set the line input terminator keys.
1113 * @keycodes: An array of <code>keycode_</code> constants, of length @count.
1114 * @count: The array length of @keycodes.
1116 * It is possible to request that other keystrokes complete line input as well.
1117 * (This allows a game to intercept function keys or other special keys during
1118 * line input.) To do this, call glk_set_terminators_line_event(), and pass an
1119 * array of @count keycodes. These must all be special keycodes (see <link
1120 * linkend="chimara-Character-Input">Character Input</link>). Do not include
1121 * regular printable characters in the array, nor %keycode_Return (which
1122 * represents the default <keycap>enter</keycap> key and will always be
1123 * recognized). To return to the default behavior, pass a %NULL or empty array.
1125 * The glk_set_terminators_line_event() affects <emphasis>subsequent</emphasis>
1126 * line input requests in the given window. It does not affect a pending line
1130 * This distinction makes life easier for interpreters that set up UI
1131 * callbacks only at the start of input.
1134 * A library may not support this feature; if it does, it may not support all
1135 * special keys as terminators. (Some keystrokes are reserved for OS or
1136 * interpreter control.) You can test for this with %gestalt_LineTerminators and
1137 * %gestalt_LineTerminatorKey.
1140 glk_set_terminators_line_event(winid_t win, glui32 *keycodes, glui32 count)
1142 VALID_WINDOW(win, return);
1144 g_slist_free(win->extra_line_terminators);
1145 win->extra_line_terminators = NULL;
1147 if(keycodes == NULL || count == 0)
1151 for(i = 0; i < count; i++)
1153 unsigned key = keycode_to_gdk_keyval(keycodes[i]);
1154 if(is_valid_line_terminator(keycodes[i]))
1155 win->extra_line_terminators = g_slist_prepend(win->extra_line_terminators, GUINT_TO_POINTER(key));
1157 WARNING_S("Ignoring invalid line terminator", gdk_keyval_name(key));