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1 /* menu_text.c - Basic text menu implementation. */
2 /*
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
5 *
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include <grub/normal.h>
21 #include <grub/term.h>
22 #include <grub/misc.h>
23 #include <grub/loader.h>
24 #include <grub/mm.h>
25 #include <grub/time.h>
26 #include <grub/env.h>
27 #include <grub/menu_viewer.h>
28 #include <grub/i18n.h>
29 #include <grub/charset.h>
30
31 static grub_uint8_t grub_color_menu_normal;
32 static grub_uint8_t grub_color_menu_highlight;
33
34 struct menu_viewer_data
35 {
36 int first, offset;
37 grub_menu_t menu;
38 struct grub_term_output *term;
39 };
40
41 grub_ssize_t
42 grub_getstringwidth (grub_uint32_t * str, const grub_uint32_t * last_position,
43 struct grub_term_output *term)
44 {
45 grub_ssize_t width = 0;
46
47 while (str < last_position)
48 {
49 struct grub_unicode_glyph glyph;
50 str += grub_unicode_aglomerate_comb (str, last_position - str, &glyph);
51 width += grub_term_getcharwidth (term, &glyph);
52 }
53 return width;
54 }
55
56 void
57 grub_print_message_indented (const char *msg, int margin_left, int margin_right,
58 struct grub_term_output *term)
59 {
60 grub_uint32_t *unicode_msg;
61 grub_uint32_t *last_position;
62
63 int msg_len;
64
65 msg_len = grub_utf8_to_ucs4_alloc (msg, &unicode_msg, &last_position);
66
67 if (msg_len < 0)
68 {
69 return;
70 }
71
72 grub_print_ucs4 (unicode_msg, last_position, margin_left, margin_right, term);
73
74 grub_free (unicode_msg);
75 }
76
77
78 static void
79 draw_border (struct grub_term_output *term)
80 {
81 unsigned i;
82
83 grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
84
85 grub_term_gotoxy (term, GRUB_TERM_MARGIN, GRUB_TERM_TOP_BORDER_Y);
86 grub_putcode (GRUB_UNICODE_CORNER_UL, term);
87 for (i = 0; i < (unsigned) grub_term_border_width (term) - 2; i++)
88 grub_putcode (GRUB_UNICODE_HLINE, term);
89 grub_putcode (GRUB_UNICODE_CORNER_UR, term);
90
91 for (i = 0; i < (unsigned) grub_term_num_entries (term); i++)
92 {
93 grub_term_gotoxy (term, GRUB_TERM_MARGIN, GRUB_TERM_TOP_BORDER_Y + i + 1);
94 grub_putcode (GRUB_UNICODE_VLINE, term);
95 grub_term_gotoxy (term, GRUB_TERM_MARGIN + grub_term_border_width (term)
96 - 1,
97 GRUB_TERM_TOP_BORDER_Y + i + 1);
98 grub_putcode (GRUB_UNICODE_VLINE, term);
99 }
100
101 grub_term_gotoxy (term, GRUB_TERM_MARGIN,
102 GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term) + 1);
103 grub_putcode (GRUB_UNICODE_CORNER_LL, term);
104 for (i = 0; i < (unsigned) grub_term_border_width (term) - 2; i++)
105 grub_putcode (GRUB_UNICODE_HLINE, term);
106 grub_putcode (GRUB_UNICODE_CORNER_LR, term);
107
108 grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
109
110 grub_term_gotoxy (term, GRUB_TERM_MARGIN,
111 (GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term)
112 + GRUB_TERM_MARGIN + 1));
113 }
114
115 static void
116 print_message (int nested, int edit, struct grub_term_output *term)
117 {
118 grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
119
120 if (edit)
121 {
122 grub_putcode ('\n', term);
123 #ifdef GRUB_MACHINE_EFI
124 grub_print_message_indented (_("Minimum Emacs-like screen editing is \
125 supported. TAB lists completions. Press F1 to boot, F2=Ctrl-a, F3=Ctrl-e, \
126 F4 for a command-line or ESC to discard edits and return to the GRUB menu."),
127 STANDARD_MARGIN, STANDARD_MARGIN, term);
128 #else
129 grub_print_message_indented (_("Minimum Emacs-like screen editing is \
130 supported. TAB lists completions. Press Ctrl-x to boot, Ctrl-c for a \
131 command-line or ESC to discard edits and return to the GRUB menu."),
132 STANDARD_MARGIN, STANDARD_MARGIN, term);
133 #endif
134 }
135 else
136 {
137 const char *msg = _("Use the %C and %C keys to select which "
138 "entry is highlighted.\n");
139 char *msg_translated;
140
141 msg_translated = grub_xasprintf (msg, GRUB_UNICODE_UPARROW,
142 GRUB_UNICODE_DOWNARROW);
143 if (!msg_translated)
144 return;
145 grub_putcode ('\n', term);
146 grub_print_message_indented (msg_translated, STANDARD_MARGIN,
147 STANDARD_MARGIN, term);
148
149 grub_free (msg_translated);
150
151 if (nested)
152 {
153 grub_print_message_indented
154 (_("Press enter to boot the selected OS, "
155 "\'e\' to edit the commands before booting "
156 "or \'c\' for a command-line. ESC to return previous menu.\n"),
157 STANDARD_MARGIN, STANDARD_MARGIN, term);
158 }
159 else
160 {
161 grub_print_message_indented
162 (_("Press enter to boot the selected OS, "
163 "\'e\' to edit the commands before booting "
164 "or \'c\' for a command-line.\n"),
165 STANDARD_MARGIN, STANDARD_MARGIN, term);
166 }
167 }
168 }
169
170 static void
171 print_entry (int y, int highlight, grub_menu_entry_t entry,
172 struct grub_term_output *term)
173 {
174 int x;
175 const char *title;
176 grub_size_t title_len;
177 grub_ssize_t len;
178 grub_uint32_t *unicode_title;
179 grub_ssize_t i;
180 grub_uint8_t old_color_normal, old_color_highlight;
181
182 title = entry ? entry->title : "";
183 title_len = grub_strlen (title);
184 unicode_title = grub_malloc (title_len * sizeof (*unicode_title));
185 if (! unicode_title)
186 /* XXX How to show this error? */
187 return;
188
189 len = grub_utf8_to_ucs4 (unicode_title, title_len,
190 (grub_uint8_t *) title, -1, 0);
191 if (len < 0)
192 {
193 /* It is an invalid sequence. */
194 grub_free (unicode_title);
195 return;
196 }
197
198 grub_term_getcolor (term, &old_color_normal, &old_color_highlight);
199 grub_term_setcolor (term, grub_color_menu_normal, grub_color_menu_highlight);
200 grub_term_setcolorstate (term, highlight
201 ? GRUB_TERM_COLOR_HIGHLIGHT
202 : GRUB_TERM_COLOR_NORMAL);
203
204 grub_term_gotoxy (term, GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN, y);
205
206 int last_printed = 0;
207 for (x = GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN + 1, i = 0;
208 x < (int) (GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term)
209 - GRUB_TERM_MARGIN);)
210 {
211 if (i < len
212 && x <= (int) (GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term)
213 - GRUB_TERM_MARGIN - 1))
214 {
215 grub_ssize_t width;
216 struct grub_unicode_glyph glyph;
217
218 i += grub_unicode_aglomerate_comb (unicode_title + i,
219 len - i, &glyph);
220
221 width = grub_term_getcharwidth (term, &glyph);
222 grub_free (glyph.combining);
223
224 if (x + width <= (int) (GRUB_TERM_LEFT_BORDER_X
225 + grub_term_border_width (term)
226 - GRUB_TERM_MARGIN - 1))
227 last_printed = i;
228 x += width;
229 }
230 else
231 break;
232 }
233
234 grub_print_ucs4 (unicode_title,
235 unicode_title + last_printed, 0, 0, term);
236
237 if (last_printed != len)
238 {
239 grub_putcode (GRUB_UNICODE_RIGHTARROW, term);
240 struct grub_unicode_glyph pseudo_glyph = {
241 .base = GRUB_UNICODE_RIGHTARROW,
242 .variant = 0,
243 .attributes = 0,
244 .ncomb = 0,
245 .combining = 0,
246 .estimated_width = 1
247 };
248 x += grub_term_getcharwidth (term, &pseudo_glyph);
249 }
250
251 for (; x < (int) (GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term)
252 - GRUB_TERM_MARGIN); x++)
253 grub_putcode (' ', term);
254
255 grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
256 grub_putcode (' ', term);
257
258 grub_term_gotoxy (term, grub_term_cursor_x (term), y);
259
260 grub_term_setcolor (term, old_color_normal, old_color_highlight);
261 grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
262 grub_free (unicode_title);
263 }
264
265 static void
266 print_entries (grub_menu_t menu, int first, int offset,
267 struct grub_term_output *term)
268 {
269 grub_menu_entry_t e;
270 int i;
271
272 grub_term_gotoxy (term,
273 GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term),
274 GRUB_TERM_FIRST_ENTRY_Y);
275
276 if (first)
277 grub_putcode (GRUB_UNICODE_UPARROW, term);
278 else
279 grub_putcode (' ', term);
280
281 e = grub_menu_get_entry (menu, first);
282
283 for (i = 0; i < grub_term_num_entries (term); i++)
284 {
285 print_entry (GRUB_TERM_FIRST_ENTRY_Y + i, offset == i, e, term);
286 if (e)
287 e = e->next;
288 }
289
290 grub_term_gotoxy (term, GRUB_TERM_LEFT_BORDER_X
291 + grub_term_border_width (term),
292 GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term));
293
294 if (e)
295 grub_putcode (GRUB_UNICODE_DOWNARROW, term);
296 else
297 grub_putcode (' ', term);
298
299 grub_term_gotoxy (term, grub_term_cursor_x (term),
300 GRUB_TERM_FIRST_ENTRY_Y + offset);
301 }
302
303 /* Initialize the screen. If NESTED is non-zero, assume that this menu
304 is run from another menu or a command-line. If EDIT is non-zero, show
305 a message for the menu entry editor. */
306 void
307 grub_menu_init_page (int nested, int edit,
308 struct grub_term_output *term)
309 {
310 grub_uint8_t old_color_normal, old_color_highlight;
311
312 grub_term_getcolor (term, &old_color_normal, &old_color_highlight);
313
314 /* By default, use the same colors for the menu. */
315 grub_color_menu_normal = old_color_normal;
316 grub_color_menu_highlight = old_color_highlight;
317
318 /* Then give user a chance to replace them. */
319 grub_parse_color_name_pair (&grub_color_menu_normal,
320 grub_env_get ("menu_color_normal"));
321 grub_parse_color_name_pair (&grub_color_menu_highlight,
322 grub_env_get ("menu_color_highlight"));
323
324 grub_normal_init_page (term);
325 grub_term_setcolor (term, grub_color_menu_normal, grub_color_menu_highlight);
326 draw_border (term);
327 grub_term_setcolor (term, old_color_normal, old_color_highlight);
328 print_message (nested, edit, term);
329 }
330
331 static void
332 menu_text_print_timeout (int timeout, void *dataptr)
333 {
334 const char *msg =
335 _("The highlighted entry will be executed automatically in %ds.");
336 struct menu_viewer_data *data = dataptr;
337 char *msg_translated;
338 int posx;
339
340 grub_term_gotoxy (data->term, 0, grub_term_height (data->term) - 3);
341
342 msg_translated = grub_xasprintf (msg, timeout);
343 if (!msg_translated)
344 {
345 grub_print_error ();
346 grub_errno = GRUB_ERR_NONE;
347 return;
348 }
349
350 grub_print_message_indented (msg_translated, 3, 0, data->term);
351
352 posx = grub_term_getxy (data->term) >> 8;
353 grub_print_spaces (data->term, grub_term_width (data->term) - posx - 1);
354
355 grub_term_gotoxy (data->term,
356 grub_term_cursor_x (data->term),
357 GRUB_TERM_FIRST_ENTRY_Y + data->offset);
358 grub_term_refresh (data->term);
359 }
360
361 static void
362 menu_text_set_chosen_entry (int entry, void *dataptr)
363 {
364 struct menu_viewer_data *data = dataptr;
365 int oldoffset = data->offset;
366 int complete_redraw = 0;
367
368 data->offset = entry - data->first;
369 if (data->offset > grub_term_num_entries (data->term) - 1)
370 {
371 data->first = entry - (grub_term_num_entries (data->term) - 1);
372 data->offset = grub_term_num_entries (data->term) - 1;
373 complete_redraw = 1;
374 }
375 if (data->offset < 0)
376 {
377 data->offset = 0;
378 data->first = entry;
379 complete_redraw = 1;
380 }
381 if (complete_redraw)
382 print_entries (data->menu, data->first, data->offset, data->term);
383 else
384 {
385 print_entry (GRUB_TERM_FIRST_ENTRY_Y + oldoffset, 0,
386 grub_menu_get_entry (data->menu, data->first + oldoffset),
387 data->term);
388 print_entry (GRUB_TERM_FIRST_ENTRY_Y + data->offset, 1,
389 grub_menu_get_entry (data->menu, data->first + data->offset),
390 data->term);
391 }
392 grub_term_refresh (data->term);
393 }
394
395 static void
396 menu_text_fini (void *dataptr)
397 {
398 struct menu_viewer_data *data = dataptr;
399
400 grub_term_setcursor (data->term, 1);
401 grub_term_cls (data->term);
402
403 }
404
405 static void
406 menu_text_clear_timeout (void *dataptr)
407 {
408 struct menu_viewer_data *data = dataptr;
409
410 grub_term_gotoxy (data->term, 0, grub_term_height (data->term) - 3);
411 grub_print_spaces (data->term, grub_term_width (data->term) - 1);
412 grub_term_gotoxy (data->term, grub_term_cursor_x (data->term),
413 GRUB_TERM_FIRST_ENTRY_Y + data->offset);
414 grub_term_refresh (data->term);
415 }
416
417 grub_err_t
418 grub_menu_try_text (struct grub_term_output *term,
419 int entry, grub_menu_t menu, int nested)
420 {
421 struct menu_viewer_data *data;
422 struct grub_menu_viewer *instance;
423
424 instance = grub_zalloc (sizeof (*instance));
425 if (!instance)
426 return grub_errno;
427
428 data = grub_zalloc (sizeof (*data));
429 if (!data)
430 {
431 grub_free (instance);
432 return grub_errno;
433 }
434
435 data->term = term;
436 instance->data = data;
437 instance->set_chosen_entry = menu_text_set_chosen_entry;
438 instance->print_timeout = menu_text_print_timeout;
439 instance->clear_timeout = menu_text_clear_timeout;
440 instance->fini = menu_text_fini;
441
442 data->menu = menu;
443
444 data->offset = entry;
445 data->first = 0;
446 if (data->offset > grub_term_num_entries (data->term) - 1)
447 {
448 data->first = data->offset - (grub_term_num_entries (data->term) - 1);
449 data->offset = grub_term_num_entries (data->term) - 1;
450 }
451
452 grub_term_setcursor (data->term, 0);
453 grub_menu_init_page (nested, 0, data->term);
454 print_entries (menu, data->first, data->offset, data->term);
455 grub_term_refresh (data->term);
456 grub_menu_register_viewer (instance);
457
458 return GRUB_ERR_NONE;
459 }