src/wtools.c

   1 /* Widget based utility functions.
   2    Copyright (C) 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007 Free Software Foundation, Inc.
   4
   5    Authors: 1994, 1995, 1996 Miguel de Icaza
   6             1994, 1995 Radek Doulik
   7             1995  Jakub Jelinek
   8             1995  Andrej Borsenkow
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23
  24  */
  25
  26 /** \file wtools.c
  27  *  \brief Source: widget based utility functions
  28  */
  29
  30 #include <config.h>
  31
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 #include "lib/global.h"
  37 #include "lib/tty/tty.h"
  38 #include "lib/tty/key.h"                /* tty_getch() */
  39 #include "lib/skin.h"           /* INPUT_COLOR */
  40 #include "lib/strutil.h"
  41
  42 #include "dialog.h"
  43 #include "widget.h"
  44 #include "wtools.h"
  45 #include "background.h"         /* parent_call */
  46
  47
  48 Listbox *
  49 create_listbox_window_centered (int center_y, int center_x, int lines, int cols,
  50                                 const char *title, const char *help)
  51 {
  52     const int listbox_colors[DLG_COLOR_NUM] =
  53     {
  54         MENU_ENTRY_COLOR,
  55         MENU_SELECTED_COLOR,
  56         MENU_HOT_COLOR,
  57         MENU_HOTSEL_COLOR,
  58     };
  59
  60     const int space = 4;
  61
  62     int xpos, ypos, len;
  63     Listbox *listbox;
  64
  65     /* Adjust sizes */
  66     lines = min (lines, LINES - 6);
  67
  68     if (title != NULL) {
  69         len = str_term_width1 (title) + 4;
  70         cols = max (cols, len);
  71     }
  72
  73     cols = min (cols, COLS - 6);
  74
  75     /* adjust position */
  76     if ((center_y < 0) || (center_x < 0)) {
  77         ypos = LINES/2;
  78         xpos = COLS/2;
  79     } else {
  80         ypos = center_y;
  81         xpos = center_x;
  82     }
  83
  84     ypos -= lines/2;
  85     xpos -= cols/2;
  86
  87     if (ypos + lines >= LINES)
  88         ypos = LINES - lines - space;
  89     if (ypos < 0)
  90         ypos = 0;
  91
  92     if (xpos + cols >= COLS)
  93         xpos = COLS - cols - space;
  94     if (xpos < 0)
  95         xpos = 0;
  96
  97     listbox = g_new (Listbox, 1);
  98
  99     listbox->dlg =
 100         create_dlg (ypos, xpos, lines + space, cols + space,
 101                     listbox_colors, NULL,
 102                     help, title, DLG_REVERSE | DLG_TRYUP);
 103
 104     listbox->list = listbox_new (2, 2, lines, cols, FALSE, NULL);
 105     add_widget (listbox->dlg, listbox->list);
 106
 107     return listbox;
 108 }
 109
 110 Listbox *
 111 create_listbox_window (int lines, int cols, const char *title, const char *help)
 112 {
 113     return create_listbox_window_centered (-1, -1, lines, cols, title, help);
 114 }
 115
 116 /* Returns the number of the item selected */
 117 int
 118 run_listbox (Listbox *l)
 119 {
 120     int val = -1;
 121
 122     if (run_dlg (l->dlg) != B_CANCEL)
 123         val = l->list->pos;
 124     destroy_dlg (l->dlg);
 125     g_free (l);
 126     return val;
 127 }
 128
 129 /* default query callback, used to reposition query */
 130 static cb_ret_t
 131 default_query_callback (Dlg_head *h, Widget *sender,
 132                         dlg_msg_t msg, int parm, void *data)
 133 {
 134     switch (msg) {
 135     case DLG_RESIZE:
 136     {
 137         int xpos = COLS / 2 - h->cols / 2;
 138         int ypos = LINES / 3 - (h->lines - 3) / 2;
 139
 140         /* set position */
 141         dlg_set_position (h, ypos, xpos, ypos + h->lines, xpos + h->cols);
 142     }
 143         return MSG_HANDLED;
 144
 145     default:
 146         return default_dlg_callback (h, sender, msg, parm, data);
 147     }
 148 }
 149
 150 static Dlg_head *last_query_dlg;
 151
 152 static int sel_pos = 0;
 153
 154 /* Used to ask questions to the user */
 155 int
 156 query_dialog (const char *header, const char *text, int flags, int count, ...)
 157 {
 158     va_list ap;
 159     Dlg_head *query_dlg;
 160     WButton *button;
 161     WButton *defbutton = NULL;
 162     int win_len = 0;
 163     int i;
 164     int result = -1;
 165     int cols, lines;
 166     char *cur_name;
 167     const int *query_colors = (flags & D_ERROR) ?
 168                                 alarm_colors : dialog_colors;
 169
 170     if (header == MSG_ERROR)
 171         header = _("Error");
 172
 173     if (count > 0) {
 174         va_start (ap, count);
 175         for (i = 0; i < count; i++) {
 176             char *cp = va_arg (ap, char *);
 177             win_len += str_term_width1 (cp) + 6;
 178             if (strchr (cp, '&') != NULL)
 179                 win_len--;
 180         }
 181         va_end (ap);
 182     }
 183
 184     /* count coordinates */
 185     str_msg_term_size (text, &lines, &cols);
 186     cols = 6 + max (win_len, max (str_term_width1 (header), cols));
 187     lines += 4 + (count > 0 ? 2 : 0);
 188
 189     /* prepare dialog */
 190     query_dlg =
 191         create_dlg (0, 0, lines, cols, query_colors, default_query_callback,
 192                     "[QueryBox]", header, DLG_NONE);
 193
 194     if (count > 0) {
 195         cols = (cols - win_len - 2) / 2 + 2;
 196         va_start (ap, count);
 197         for (i = 0; i < count; i++) {
 198             int xpos;
 199
 200             cur_name = va_arg (ap, char *);
 201             xpos = str_term_width1 (cur_name) + 6;
 202             if (strchr (cur_name, '&') != NULL)
 203                 xpos--;
 204
 205             button =
 206                 button_new (lines - 3, cols, B_USER + i, NORMAL_BUTTON,
 207                             cur_name, 0);
 208             add_widget (query_dlg, button);
 209             cols += xpos;
 210             if (i == sel_pos)
 211                 defbutton = button;
 212         }
 213         va_end (ap);
 214
 215         add_widget (query_dlg, label_new (2, 3, text));
 216
 217         /* do resize before running and selecting any widget */
 218         default_query_callback (query_dlg, NULL, DLG_RESIZE, 0, NULL);
 219
 220         if (defbutton)
 221             dlg_select_widget (defbutton);
 222
 223         /* run dialog and make result */
 224         switch (run_dlg (query_dlg)) {
 225         case B_CANCEL:
 226             break;
 227         default:
 228             result = query_dlg->ret_value - B_USER;
 229         }
 230
 231         /* free used memory */
 232         destroy_dlg (query_dlg);
 233     } else {
 234         add_widget (query_dlg, label_new (2, 3, text));
 235         add_widget (query_dlg,
 236                     button_new (0, 0, 0, HIDDEN_BUTTON, "-", 0));
 237         last_query_dlg = query_dlg;
 238     }
 239     sel_pos = 0;
 240     return result;
 241 }
 242
 243 void query_set_sel (int new_sel)
 244 {
 245     sel_pos = new_sel;
 246 }
 247
 248
 249 /* Create message dialog */
 250 static struct Dlg_head *
 251 do_create_message (int flags, const char *title, const char *text)
 252 {
 253     char *p;
 254     Dlg_head *d;
 255
 256     /* Add empty lines before and after the message */
 257     p = g_strconcat ("\n", text, "\n", (char *) NULL);
 258     query_dialog (title, p, flags, 0);
 259     d = last_query_dlg;
 260
 261     /* do resize before initing and running */
 262     default_query_callback (d, NULL, DLG_RESIZE, 0, NULL);
 263
 264     init_dlg (d);
 265     g_free (p);
 266
 267     return d;
 268 }
 269
 270
 271 /*
 272  * Create message dialog.  The caller must call dlg_run_done() and
 273  * destroy_dlg() to dismiss it.  Not safe to call from background.
 274  */
 275 struct Dlg_head *
 276 create_message (int flags, const char *title, const char *text, ...)
 277 {
 278     va_list args;
 279     Dlg_head *d;
 280     char *p;
 281
 282     va_start (args, text);
 283     p = g_strdup_vprintf (text, args);
 284     va_end (args);
 285
 286     d = do_create_message (flags, title, p);
 287     g_free (p);
 288
 289     return d;
 290 }
 291
 292
 293 /*
 294  * Show message dialog.  Dismiss it when any key is pressed.
 295  * Not safe to call from background.
 296  */
 297 static void
 298 fg_message (int flags, const char *title, const char *text)
 299 {
 300     Dlg_head *d;
 301
 302     d = do_create_message (flags, title, text);
 303     tty_getch ();
 304     dlg_run_done (d);
 305     destroy_dlg (d);
 306 }
 307
 308
 309 /* Show message box from background */
 310 #ifdef WITH_BACKGROUND
 311 static void
 312 bg_message (int dummy, int *flags, char *title, const char *text)
 313 {
 314     (void) dummy;
 315     title = g_strconcat (_("Background process:"), " ", title, (char *) NULL);
 316     fg_message (*flags, title, text);
 317     g_free (title);
 318 }
 319 #endif                          /* WITH_BACKGROUND */
 320
 321
 322 /* Show message box, background safe */
 323 void
 324 message (int flags, const char *title, const char *text, ...)
 325 {
 326     char *p;
 327     va_list ap;
 328     union {
 329         void *p;
 330         void (*f) (int, int *, char *, const char *);
 331     } func;
 332
 333     va_start (ap, text);
 334     p = g_strdup_vprintf (text, ap);
 335     va_end (ap);
 336
 337     if (title == MSG_ERROR)
 338         title = _("Error");
 339
 340 #ifdef WITH_BACKGROUND
 341     if (we_are_background) {
 342         func.f = bg_message;
 343         parent_call (func.p, NULL, 3, sizeof (flags), &flags,
 344                      strlen (title), title, strlen (p), p);
 345     } else
 346 #endif                          /* WITH_BACKGROUND */
 347         fg_message (flags, title, p);
 348
 349     g_free (p);
 350 }
 351
 352
 353 /* {{{ Quick dialog routines */
 354
 355
 356 int
 357 quick_dialog_skip (QuickDialog *qd, int nskip)
 358 {
 359 #ifdef ENABLE_NLS
 360 #define I18N(x) (x = !qd->i18n && x && *x ? _(x): x)
 361 #else
 362 #define I18N(x) (x = x)
 363 #endif
 364     Dlg_head *dd;
 365     QuickWidget *qw;
 366     WInput *in;
 367     WRadio *r;
 368     int return_val;
 369
 370     I18N (qd->title);
 371
 372     if ((qd->xpos == -1) || (qd->ypos == -1))
 373         dd = create_dlg (0, 0, qd->ylen, qd->xlen,
 374                             dialog_colors, NULL, qd->help, qd->title,
 375                             DLG_CENTER | DLG_TRYUP | DLG_REVERSE);
 376     else
 377         dd = create_dlg (qd->ypos, qd->xpos, qd->ylen, qd->xlen,
 378                             dialog_colors, NULL, qd->help, qd->title,
 379                             DLG_REVERSE);
 380
 381     for (qw = qd->widgets; qw->widget_type != quick_end; qw++) {
 382         int xpos;
 383         int ypos;
 384
 385         xpos = (qd->xlen * qw->relative_x) / qw->x_divisions;
 386         ypos = (qd->ylen * qw->relative_y) / qw->y_divisions;
 387
 388         switch (qw->widget_type) {
 389         case quick_checkbox:
 390             qw->widget = (Widget *) check_new (ypos, xpos, *qw->u.checkbox.state, I18N (qw->u.checkbox.text));
 391             break;
 392
 393         case quick_button:
 394             qw->widget = (Widget *) button_new (ypos, xpos, qw->u.button.action,
 395                             (qw->u.button.action == B_ENTER) ? DEFPUSH_BUTTON : NORMAL_BUTTON,
 396                             I18N (qw->u.button.text), qw->u.button.callback);
 397             break;
 398
 399         case quick_input:
 400             in = input_new (ypos, xpos, INPUT_COLOR, qw->u.input.len,
 401                             qw->u.input.text, qw->u.input.histname, INPUT_COMPLETE_DEFAULT);
 402             in->is_password = (qw->u.input.flags == 1);
 403             in->point = 0;
 404             if ((qw->u.input.flags & 2) != 0)
 405                 in->completion_flags |= INPUT_COMPLETE_CD;
 406             qw->widget = (Widget *) in;
 407             *qw->u.input.result = NULL;
 408             break;
 409
 410         case quick_label:
 411             qw->widget = (Widget *) label_new (ypos, xpos, I18N (qw->u.label.text));
 412             break;
 413
 414         case quick_radio:
 415         {
 416             int i;
 417             char **items = NULL;
 418
 419             /* create the copy of radio_items to avoid mwmory leak */
 420             items = g_new0 (char *, qw->u.radio.count + 1);
 421
 422             if (!qd->i18n)
 423                 for (i = 0; i < qw->u.radio.count; i++)
 424                     items[i] = g_strdup (_(qw->u.radio.items[i]));
 425             else
 426                 for (i = 0; i < qw->u.radio.count; i++)
 427                     items[i] = g_strdup (qw->u.radio.items[i]);
 428
 429             r = radio_new (ypos, xpos, qw->u.radio.count, (const char **) items);
 430             r->pos = r->sel = *qw->u.radio.value;
 431             qw->widget = (Widget *) r;
 432             g_strfreev (items);
 433             break;
 434         }
 435
 436         default:
 437             qw->widget = NULL;
 438             fprintf (stderr, "QuickWidget: unknown widget type\n");
 439             break;
 440         }
 441
 442         add_widget (dd, qw->widget);
 443     }
 444
 445     while (nskip-- != 0)
 446         dd->current = dd->current->next;
 447
 448     return_val = run_dlg (dd);
 449
 450     /* Get the data if we found something interesting */
 451     if (return_val != B_CANCEL) {
 452         for (qw = qd->widgets; qw->widget_type != quick_end; qw++) {
 453             switch (qw->widget_type) {
 454             case quick_checkbox:
 455                 *qw->u.checkbox.state = ((WCheck *) qw->widget)->state & C_BOOL;
 456                 break;
 457
 458             case quick_input:
 459                 if ((qw->u.input.flags & 2) != 0)
 460                     *qw->u.input.result = tilde_expand (((WInput *) qw->widget)->buffer);
 461                 else
 462                     *qw->u.input.result = g_strdup (((WInput *) qw->widget)->buffer);
 463                 break;
 464
 465             case quick_radio:
 466                 *qw->u.radio.value = ((WRadio *) qw->widget)->sel;
 467                 break;
 468
 469             default:
 470                 break;
 471             }
 472         }
 473     }
 474
 475     destroy_dlg (dd);
 476
 477     return return_val;
 478 #undef I18N
 479 }
 480
 481 int
 482 quick_dialog (QuickDialog *qd)
 483 {
 484     return quick_dialog_skip (qd, 0);
 485 }
 486
 487 /* }}} */
 488
 489 /* {{{ Input routines */
 490
 491 /*
 492  * Show dialog, not background safe.
 493  *
 494  * If the arguments "header" and "text" should be translated,
 495  * that MUST be done by the caller of fg_input_dialog_help().
 496  *
 497  * The argument "history_name" holds the name of a section
 498  * in the history file. Data entered in the input field of
 499  * the dialog box will be stored there.
 500  *
 501  */
 502 static char *
 503 fg_input_dialog_help (const char *header, const char *text, const char *help,
 504                       const char *history_name, const char *def_text)
 505 {
 506     char *my_str;
 507
 508     QuickWidget quick_widgets[] = {
 509         /* 0 */ QUICK_BUTTON (6, 10, 1, 0, N_("&Cancel"), B_CANCEL, NULL),
 510         /* 1 */ QUICK_BUTTON (3, 10, 1, 0, N_("&OK"),     B_ENTER,  NULL),
 511         /* 2 */ QUICK_INPUT (3, 80, 0, 0, def_text, 58, 0, NULL, &my_str),
 512         /* 3 */ QUICK_LABEL (3, 80, 2, 0, ""),
 513         QUICK_END
 514     };
 515
 516     char histname [64] = "inp|";
 517     int lines, cols;
 518     int len;
 519     int i;
 520     char *p_text;
 521     int ret;
 522
 523     if (history_name != NULL && *history_name != '\0') {
 524         g_strlcpy (histname + 3, history_name, sizeof (histname) - 3);
 525         quick_widgets[2].u.input.histname = histname;
 526     }
 527
 528     msglen (text, &lines, &cols);
 529     len = max (max (str_term_width1 (header), cols) + 4, 64);
 530
 531     /* The special value of def_text is used to identify password boxes
 532        and hide characters with "*".  Don't save passwords in history! */
 533     if (def_text == INPUT_PASSWORD) {
 534         quick_widgets[2].u.input.flags = 1;
 535         histname[3] = '\0';
 536         quick_widgets[2].u.input.text = "";
 537     }
 538
 539 #ifdef ENABLE_NLS
 540     /*
 541      * An attempt to place buttons symmetrically, based on actual i18n
 542      * length of the string. It looks nicer with i18n (IMO) - alex
 543      */
 544     quick_widgets[0].u.button.text = _(quick_widgets[0].u.button.text);
 545     quick_widgets[1].u.button.text = _(quick_widgets[1].u.button.text);
 546     quick_widgets[0].relative_x = len / 2 + 4;
 547     quick_widgets[1].relative_x =
 548         len / 2 - (str_term_width1 (quick_widgets[1].u.button.text) + 9);
 549     quick_widgets[0].x_divisions = quick_widgets[1].x_divisions = len;
 550 #endif                          /* ENABLE_NLS */
 551
 552     p_text = g_strstrip (g_strdup (text));
 553     quick_widgets[3].u.label.text = p_text;
 554
 555     {
 556         QuickDialog Quick_input =
 557         {
 558             len, lines + 6, -1, -1, header,
 559             help, quick_widgets, TRUE
 560         };
 561
 562         for (i = 0; i < 4; i++) {
 563             quick_widgets[i].x_divisions = Quick_input.xlen;
 564             quick_widgets[i].y_divisions = Quick_input.ylen;
 565         }
 566
 567         for (i = 0; i < 3; i++)
 568             quick_widgets[i].relative_y += 2 + lines;
 569
 570         /* input line length */
 571         quick_widgets[2].u.input.len = Quick_input.xlen - 6;
 572
 573         ret = quick_dialog (&Quick_input);
 574     }
 575
 576     g_free (p_text);
 577
 578     return (ret != B_CANCEL) ? my_str : NULL;
 579 }
 580
 581 /*
 582  * Show input dialog, background safe.
 583  *
 584  * If the arguments "header" and "text" should be translated,
 585  * that MUST be done by the caller of these wrappers.
 586  */
 587 char *
 588 input_dialog_help (const char *header, const char *text, const char *help,
 589                    const char *history_name, const char *def_text)
 590 {
 591     union {
 592         void *p;
 593         char * (*f) (const char *, const char *, const char *,
 594                       const char *, const char *);
 595     } func;
 596 #ifdef WITH_BACKGROUND
 597     if (we_are_background)
 598     {
 599         func.f = fg_input_dialog_help;
 600         return parent_call_string (func.p, 5,
 601                                    strlen (header), header, strlen (text),
 602                                    text, strlen (help), help,
 603                                    strlen (history_name), history_name,
 604                                    strlen (def_text), def_text);
 605     }
 606     else
 607 #endif                          /* WITH_BACKGROUND */
 608         return fg_input_dialog_help (header, text, help, history_name, def_text);
 609 }
 610
 611 /* Show input dialog with default help, background safe */
 612 char *input_dialog (const char *header, const char *text,
 613                     const char *history_name, const char *def_text)
 614 {
 615     return input_dialog_help (header, text, "[Input Line Keys]", history_name, def_text);
 616 }
 617
 618 char *
 619 input_expand_dialog (const char *header, const char *text,
 620                      const char *history_name, const char *def_text)
 621 {
 622     char *result;
 623     char *expanded;
 624
 625     result = input_dialog (header, text, history_name, def_text);
 626     if (result) {
 627         expanded = tilde_expand (result);
 628         g_free (result);
 629         return expanded;
 630     }
 631     return result;
 632 }
 633
 634 /* }}} */
 635
 636 /* }}} */
 637 /*
 638   Cause emacs to enter folding mode for this file:
 639   Local variables:
 640   end:
 641 */