src/dialog.c

   1 /* Dialog box features module for the Midnight Commander
   2    Copyright (C) 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2007 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 /** \file dialog.c
  21  *  \brief Source: dialog box features module
  22  */
  23
  24 #include <config.h>
  25
  26 #include <ctype.h>
  27 #include <stdlib.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #include "global.h"
  33
  34 #include "../src/tty/tty.h"
  35 #include "../src/skin/skin.h"
  36 #include "../src/tty/mouse.h"
  37 #include "../src/tty/key.h"
  38
  39 #include "help.h"       /* interactive_display() */
  40 #include "dialog.h"
  41 #include "layout.h"
  42 #include "execute.h"    /* suspend_cmd() */
  43 #include "main.h"       /* fast_refresh */
  44 #include "strutil.h"
  45 #include "setup.h"      /* mouse_close_dialog */
  46
  47 /* Color styles for normal and error dialogs */
  48 int dialog_colors [4];
  49 int alarm_colors [4];
  50
  51 /* Primitive way to check if the the current dialog is our dialog */
  52 /* This is needed by async routines like load_prompt */
  53 Dlg_head *current_dlg = 0;
  54
  55 /* A hook list for idle events */
  56 Hook *idle_hook = 0;
  57
  58 /* left click outside of dialog closes it */
  59 int mouse_close_dialog = 0;
  60
  61 static void dlg_broadcast_msg_to (Dlg_head * h, widget_msg_t message,
  62                                   int reverse, int flags);
  63
  64 /* draw box in window */
  65 void
  66 draw_box (Dlg_head *h, int y, int x, int ys, int xs)
  67 {
  68     tty_draw_box (h->y + y, h->x + x, ys, xs);
  69 }
  70
  71 void
  72 widget_erase (Widget *w)
  73 {
  74     tty_fill_region (w->y, w->x, w->lines, w->cols, ' ');
  75 }
  76
  77 void
  78 dlg_erase (Dlg_head *h)
  79 {
  80     if (h != NULL)
  81         tty_fill_region (h->y, h->x, h->lines, h->cols, ' ');
  82 }
  83
  84 void
  85 init_widget (Widget *w, int y, int x, int lines, int cols,
  86              callback_fn callback, mouse_h mouse_handler)
  87 {
  88     w->x = x;
  89     w->y = y;
  90     w->cols = cols;
  91     w->lines = lines;
  92     w->callback = callback;
  93     w->mouse = mouse_handler;
  94     w->parent = 0;
  95
  96     /* Almost all widgets want to put the cursor in a suitable place */
  97     w->options = W_WANT_CURSOR;
  98 }
  99
 100 /* Clean the dialog area, draw the frame and the title */
 101 void
 102 common_dialog_repaint (struct Dlg_head *h)
 103 {
 104     int space;
 105
 106     space = (h->flags & DLG_COMPACT) ? 0 : 1;
 107
 108     tty_setcolor (DLG_NORMALC (h));
 109     dlg_erase (h);
 110     draw_box (h, space, space, h->lines - 2 * space, h->cols - 2 * space);
 111
 112     if (h->title) {
 113         tty_setcolor (DLG_HOT_NORMALC (h));
 114         dlg_move (h, space, (h->cols - str_term_width1 (h->title)) / 2);
 115         tty_print_string (h->title);
 116     }
 117 }
 118
 119 /* this function allows to set dialog position */
 120 void
 121 dlg_set_position (Dlg_head *h, int y1, int x1, int y2, int x2)
 122 {
 123     /* save old positions, will be used to reposition childs */
 124     int ox, oy, oc, ol;
 125     int shift_x, shift_y, scale_x, scale_y;
 126
 127     /* save old positions, will be used to reposition childs */
 128     ox = h->x;
 129     oy = h->y;
 130     oc = h->cols;
 131     ol = h->lines;
 132
 133     h->x = x1;
 134     h->y = y1;
 135     h->lines = y2 - y1;
 136     h->cols = x2 - x1;
 137
 138     /* values by which controls should be moved */
 139     shift_x = h->x - ox;
 140     shift_y = h->y - oy;
 141     scale_x = h->cols - oc;
 142     scale_y = h->lines - ol;
 143
 144     if (h->current == NULL)
 145         return;
 146
 147     if ((shift_x != 0) || (shift_y != 0) || (scale_x != 0) || (scale_y != 0)) {
 148         Widget *c = h->current;
 149
 150         do {
 151             /* there are, mainly, 2 generally possible
 152                situations:
 153
 154                1. control sticks to one side - it
 155                should be moved
 156
 157                2. control sticks to two sides of
 158                one direction - it should be sized */
 159
 160             int x = c->x;
 161             int y = c->y;
 162             int cols = c->cols;
 163             int lines = c->lines;
 164
 165             if ((c->pos_flags & WPOS_KEEP_LEFT) && (c->pos_flags & WPOS_KEEP_RIGHT)) {
 166                 x += shift_x;
 167                 cols += scale_x;
 168             } else if (c->pos_flags & WPOS_KEEP_LEFT)
 169                 x += shift_x;
 170             else if (c->pos_flags & WPOS_KEEP_RIGHT)
 171                 x += shift_x + scale_x;
 172
 173             if ((c->pos_flags & WPOS_KEEP_TOP) && (c->pos_flags & WPOS_KEEP_BOTTOM)) {
 174                 y += shift_y;
 175                 lines += scale_y;
 176             } else if (c->pos_flags & WPOS_KEEP_TOP)
 177                 y += shift_y;
 178             else if (c->pos_flags & WPOS_KEEP_BOTTOM)
 179                 y += shift_y + scale_y;
 180
 181             widget_set_size (c, y, x, lines, cols);
 182
 183             c = c->next;
 184         } while (h->current != c);
 185     }
 186 }
 187
 188 /* this function sets only size, leaving positioning to automatic methods */
 189 void
 190 dlg_set_size (Dlg_head *h, int lines, int cols)
 191 {
 192     int x = h->x;
 193     int y = h->y;
 194
 195     if (h->flags & DLG_CENTER) {
 196         y = (LINES - lines) / 2;
 197         x = (COLS - cols) / 2;
 198     }
 199
 200     if ((h->flags & DLG_TRYUP) && (y > 3))
 201         y -= 2;
 202
 203     dlg_set_position (h, y, x, y + lines, x + cols);
 204 }
 205
 206 /* Default dialog callback */
 207 cb_ret_t default_dlg_callback (Dlg_head *h, dlg_msg_t msg, int parm)
 208 {
 209     (void) parm;
 210
 211     switch (msg) {
 212     case DLG_DRAW:
 213         if (h->color != NULL) {
 214             common_dialog_repaint (h);
 215             return MSG_HANDLED;
 216         }
 217         return MSG_NOT_HANDLED;
 218
 219     case DLG_IDLE:
 220         dlg_broadcast_msg_to (h, WIDGET_IDLE, 0, W_WANT_IDLE);
 221         return MSG_HANDLED;
 222
 223     case DLG_RESIZE:
 224         /* this is default resizing mechanism */
 225         /* the main idea of this code is to resize dialog
 226           according to flags (if any of flags require automatic
 227           resizing, like DLG_CENTER, end after that reposition
 228           controls in dialog according to flags of widget) */
 229         dlg_set_size (h, h->lines, h->cols);
 230         return MSG_HANDLED;
 231
 232     default:
 233         break;
 234     }
 235
 236     return MSG_NOT_HANDLED;
 237 }
 238
 239 Dlg_head *
 240 create_dlg (int y1, int x1, int lines, int cols, const int *color_set,
 241             dlg_cb_fn callback, const char *help_ctx, const char *title,
 242             int flags)
 243 {
 244     Dlg_head *new_d;
 245
 246     new_d = g_new0 (Dlg_head, 1);
 247     if (color_set != NULL) {
 248         new_d->color = g_new (int, DLG_COLOR_NUM);
 249         memmove (new_d->color, color_set, sizeof (int) * DLG_COLOR_NUM);
 250     }
 251     new_d->help_ctx = help_ctx;
 252     new_d->callback = (callback != NULL) ? callback : default_dlg_callback;
 253     new_d->x = x1;
 254     new_d->y = y1;
 255     new_d->flags = flags;
 256     new_d->data = NULL;
 257
 258     dlg_set_size (new_d, lines, cols);
 259
 260     /* Strip existing spaces, add one space before and after the title */
 261     if (title) {
 262         char *t;
 263
 264         t = g_strstrip (g_strdup (title));
 265         if (*t != '\0')
 266             new_d->title = g_strdup_printf (" %s ", t);
 267         g_free (t);
 268     }
 269
 270     return new_d;
 271 }
 272
 273 void
 274 dlg_set_default_colors (void)
 275 {
 276     dialog_colors [0] = COLOR_NORMAL;
 277     dialog_colors [1] = COLOR_FOCUS;
 278     dialog_colors [2] = COLOR_HOT_NORMAL;
 279     dialog_colors [3] = COLOR_HOT_FOCUS;
 280
 281     alarm_colors [0] = ERROR_COLOR;
 282     alarm_colors [1] = REVERSE_COLOR;
 283     alarm_colors [2] = ERROR_HOT_NORMAL;
 284     alarm_colors [3] = ERROR_HOT_FOCUS;
 285 }
 286
 287 void
 288 set_idle_proc (Dlg_head *d, int enable)
 289 {
 290     if (enable)
 291         d->flags |= DLG_WANT_IDLE;
 292     else
 293         d->flags &= ~DLG_WANT_IDLE;
 294 }
 295
 296 /*
 297  * Insert widget to dialog before current widget.  For dialogs populated
 298  * from the bottom, make the widget current.  Return widget number.
 299  */
 300 int
 301 add_widget_autopos (Dlg_head *h, void *w, widget_pos_flags_t pos_flags)
 302 {
 303     Widget *widget = (Widget *) w;
 304
 305     /* Don't accept 0 widgets, and running dialogs */
 306     if (!widget || h->running)
 307         abort ();
 308
 309     widget->x += h->x;
 310     widget->y += h->y;
 311     widget->parent = h;
 312     widget->dlg_id = h->count++;
 313     widget->pos_flags = pos_flags;
 314
 315     if (h->current) {
 316         widget->next = h->current;
 317         widget->prev = h->current->prev;
 318         h->current->prev->next = widget;
 319         h->current->prev = widget;
 320     } else {
 321         widget->prev = widget;
 322         widget->next = widget;
 323     }
 324
 325     if ((h->flags & DLG_REVERSE) || !h->current)
 326         h->current = widget;
 327
 328     return widget->dlg_id;
 329 }
 330
 331 /* wrapper to simply add lefttop positioned controls */
 332 int
 333 add_widget (Dlg_head *h, void *w)
 334 {
 335     return add_widget_autopos (h, w, WPOS_KEEP_LEFT | WPOS_KEEP_TOP);
 336 }
 337
 338 enum {
 339     REFRESH_COVERS_PART,        /* If the refresh fn convers only a part */
 340     REFRESH_COVERS_ALL          /* If the refresh fn convers all the screen */
 341 };
 342
 343 static void
 344 do_complete_refresh (Dlg_head *dlg)
 345 {
 346     if (!dlg->fullscreen && dlg->parent)
 347         do_complete_refresh (dlg->parent);
 348
 349     dlg_redraw (dlg);
 350 }
 351
 352 void
 353 do_refresh (void)
 354 {
 355     if (!current_dlg)
 356         return;
 357
 358     if (fast_refresh)
 359         dlg_redraw (current_dlg);
 360     else {
 361         do_complete_refresh (current_dlg);
 362     }
 363 }
 364
 365 /* broadcast a message to all the widgets in a dialog that have
 366  * the options set to flags. If flags is zero, the message is sent
 367  * to all widgets.
 368  */
 369 static void
 370 dlg_broadcast_msg_to (Dlg_head *h, widget_msg_t message, int reverse,
 371                       int flags)
 372 {
 373     Widget *p, *first, *wi;
 374
 375     if (!h->current)
 376         return;
 377
 378     if (reverse)
 379         first = p = h->current->prev;
 380     else
 381         first = p = h->current->next;
 382
 383     do {
 384         wi = p;
 385         if (reverse)
 386             p = p->prev;
 387         else
 388             p = p->next;
 389         if (flags == 0 || (flags & wi->options))
 390             send_message (wi, message, 0);
 391     } while (first != p);
 392 }
 393
 394 /* broadcast a message to all the widgets in a dialog */
 395 void
 396 dlg_broadcast_msg (Dlg_head *h, widget_msg_t message, int reverse)
 397 {
 398     dlg_broadcast_msg_to (h, message, reverse, 0);
 399 }
 400
 401 int dlg_focus (Dlg_head *h)
 402 {
 403     if (!h->current)
 404         return 0;
 405
 406     if (send_message (h->current, WIDGET_FOCUS, 0)){
 407         (*h->callback) (h, DLG_FOCUS, 0);
 408         return 1;
 409     }
 410     return 0;
 411 }
 412
 413 static int
 414 dlg_unfocus (Dlg_head *h)
 415 {
 416     if (!h->current)
 417         return 0;
 418
 419     if (send_message (h->current, WIDGET_UNFOCUS, 0)){
 420         (*h->callback) (h, DLG_UNFOCUS, 0);
 421         return 1;
 422     }
 423     return 0;
 424 }
 425
 426
 427 /* Return true if the windows overlap */
 428 int dlg_overlap (Widget *a, Widget *b)
 429 {
 430     if ((b->x >= a->x + a->cols)
 431         || (a->x >= b->x + b->cols)
 432         || (b->y >= a->y + a->lines)
 433         || (a->y >= b->y + b->lines))
 434         return 0;
 435     return 1;
 436 }
 437
 438
 439 /* Find the widget with the given callback in the dialog h */
 440 Widget *
 441 find_widget_type (Dlg_head *h, callback_fn callback)
 442 {
 443     Widget *w;
 444     Widget *item;
 445     int i;
 446
 447     if (!h)
 448         return 0;
 449     if (!h->current)
 450         return 0;
 451
 452     w = 0;
 453     for (i = 0, item = h->current; i < h->count; i++, item = item->next) {
 454         if (item->callback == callback) {
 455             w = item;
 456             break;
 457         }
 458     }
 459     return w;
 460 }
 461
 462 /* Find the widget with the given dialog id in the dialog h and select it */
 463 void
 464 dlg_select_by_id (Dlg_head *h, int id)
 465 {
 466     Widget *w, *w_found;
 467
 468     if (!h->current)
 469         return;
 470
 471     w = h->current;
 472     w_found = NULL;
 473
 474     do {
 475         if (w->dlg_id == id) {
 476             w_found = w;
 477             break;
 478         }
 479         w = w->next;
 480     } while (w != h->current);
 481
 482     if (w_found)
 483         dlg_select_widget(w_found);
 484 }
 485
 486
 487 /* What to do if the requested widget doesn't take focus */
 488 typedef enum {
 489     SELECT_NEXT,                /* go the the next widget */
 490     SELECT_PREV,                /* go the the previous widget */
 491     SELECT_EXACT                /* use current widget */
 492 } select_dir_t;
 493
 494 /*
 495  * Try to select another widget.  If forward is set, follow tab order.
 496  * Otherwise go to the previous widget.
 497  */
 498 static void
 499 do_select_widget (Dlg_head *h, Widget *w, select_dir_t dir)
 500 {
 501     Widget *w0 = h->current;
 502
 503     if (!dlg_unfocus (h))
 504         return;
 505
 506     h->current = w;
 507     do {
 508         if (dlg_focus (h))
 509             break;
 510
 511         switch (dir) {
 512         case SELECT_NEXT:
 513             h->current = h->current->next;
 514             break;
 515         case SELECT_PREV:
 516             h->current = h->current->prev;
 517             break;
 518         case SELECT_EXACT:
 519             h->current = w0;
 520             dlg_focus (h);
 521             return;
 522         }
 523     } while (h->current != w);
 524
 525     if (dlg_overlap (w0, h->current)) {
 526         send_message (h->current, WIDGET_DRAW, 0);
 527         send_message (h->current, WIDGET_FOCUS, 0);
 528     }
 529 }
 530
 531
 532 /*
 533  * Try to select widget in the dialog.
 534  */
 535 void
 536 dlg_select_widget (void *w)
 537 {
 538     do_select_widget (((Widget *) w)->parent, w, SELECT_NEXT);
 539 }
 540
 541
 542 /* Try to select previous widget in the tab order */
 543 void
 544 dlg_one_up (Dlg_head *h)
 545 {
 546     if (h->current)
 547         do_select_widget (h, h->current->prev, SELECT_PREV);
 548 }
 549
 550
 551 /* Try to select next widget in the tab order */
 552 void
 553 dlg_one_down (Dlg_head *h)
 554 {
 555     if (h->current)
 556         do_select_widget (h, h->current->next, SELECT_NEXT);
 557 }
 558
 559
 560 void update_cursor (Dlg_head *h)
 561 {
 562     Widget *p = h->current;
 563
 564     if (p != NULL) {
 565         if (p->options & W_WANT_CURSOR)
 566             send_message (p, WIDGET_CURSOR, 0);
 567         else
 568             while ((p = p->next) != h->current)
 569                 if (p->options & W_WANT_CURSOR)
 570                     if (send_message (p, WIDGET_CURSOR, 0) == MSG_HANDLED)
 571                         break;
 572     }
 573 }
 574
 575 /* Redraw the widgets in reverse order, leaving the current widget
 576  * as the last one
 577  */
 578 void dlg_redraw (Dlg_head *h)
 579 {
 580     (h->callback)(h, DLG_DRAW, 0);
 581
 582     dlg_broadcast_msg (h, WIDGET_DRAW, 1);
 583
 584     update_cursor (h);
 585 }
 586
 587 void dlg_stop (Dlg_head *h)
 588 {
 589     h->running = 0;
 590 }
 591
 592 static void
 593 dialog_handle_key (Dlg_head *h, int d_key)
 594 {
 595     if (is_abort_char (d_key)) {
 596         h->ret_value = B_CANCEL;
 597         dlg_stop (h);
 598         return;
 599     }
 600
 601     switch (d_key) {
 602     case '\n':
 603     case KEY_ENTER:
 604         h->ret_value = B_ENTER;
 605         dlg_stop (h);
 606         break;
 607
 608     case KEY_LEFT:
 609     case KEY_UP:
 610         dlg_one_up (h);
 611         break;
 612
 613     case KEY_RIGHT:
 614     case KEY_DOWN:
 615         dlg_one_down (h);
 616         break;
 617
 618     case KEY_F(1):
 619         interactive_display (NULL, h->help_ctx);
 620         do_refresh ();
 621         break;
 622
 623     case XCTRL('z'):
 624         suspend_cmd ();
 625         /* Fall through */
 626
 627     case XCTRL('l'):
 628 #ifdef HAVE_SLANG
 629         tty_touch_screen ();
 630         mc_refresh ();
 631 #else
 632         /* Use this if the refreshes fail */
 633         clr_scr ();
 634         repaint_screen ();
 635 #endif /* HAVE_SLANG */
 636         break;
 637
 638     default:
 639         break;
 640     }
 641 }
 642
 643 static cb_ret_t
 644 dlg_try_hotkey (Dlg_head *h, int d_key)
 645 {
 646     Widget *hot_cur;
 647     cb_ret_t handled;
 648     int c;
 649
 650     if (h->current == NULL)
 651         return MSG_NOT_HANDLED;
 652
 653     /*
 654      * Explanation: we don't send letter hotkeys to other widgets if
 655      * the currently selected widget is an input line
 656      */
 657
 658     if (h->current->options & W_IS_INPUT) {
 659         /* skip ascii control characters, anything else can valid character in
 660          * some encoding */
 661         if (d_key >= 32 && d_key < 256)
 662             return MSG_NOT_HANDLED;
 663     }
 664
 665     /* If it's an alt key, send the message */
 666     c = d_key & ~ALT (0);
 667     if (d_key & ALT (0) && g_ascii_isalpha (c))
 668         d_key = g_ascii_tolower (c);
 669
 670     handled = MSG_NOT_HANDLED;
 671     if (h->current->options & W_WANT_HOTKEY)
 672         handled = send_message (h->current, WIDGET_HOTKEY, d_key);
 673
 674     /* If not used, send hotkey to other widgets */
 675     if (handled == MSG_HANDLED)
 676         return MSG_HANDLED;
 677
 678     hot_cur = h->current->next;
 679
 680     /* send it to all widgets */
 681     while (h->current != hot_cur && handled == MSG_NOT_HANDLED) {
 682         if (hot_cur->options & W_WANT_HOTKEY)
 683             handled = send_message (hot_cur, WIDGET_HOTKEY, d_key);
 684
 685         if (handled == MSG_NOT_HANDLED)
 686             hot_cur = hot_cur->next;
 687     }
 688
 689     if (handled == MSG_HANDLED)
 690         do_select_widget (h, hot_cur, SELECT_EXACT);
 691
 692     return handled;
 693 }
 694
 695 static void
 696 dlg_key_event (Dlg_head *h, int d_key)
 697 {
 698     cb_ret_t handled;
 699
 700     if (h->current == NULL)
 701         return;
 702
 703     /* TAB used to cycle */
 704     if (!(h->flags & DLG_WANT_TAB)) {
 705         if (d_key == '\t') {
 706             dlg_one_down (h);
 707             return;
 708         } else if (d_key == KEY_BTAB) {
 709             dlg_one_up (h);
 710             return;
 711         }
 712     }
 713
 714     /* first can dlg_callback handle the key */
 715     handled = (*h->callback) (h, DLG_KEY, d_key);
 716
 717     /* next try the hotkey */
 718     if (handled == MSG_NOT_HANDLED)
 719         handled = dlg_try_hotkey (h, d_key);
 720
 721     if (handled == MSG_HANDLED)
 722         (*h->callback) (h, DLG_HOTKEY_HANDLED, 0);
 723     else
 724         /* not used - then try widget_callback */
 725         handled = send_message (h->current, WIDGET_KEY, d_key);
 726
 727     /* not used- try to use the unhandled case */
 728     if (handled == MSG_NOT_HANDLED)
 729         handled = (*h->callback) (h, DLG_UNHANDLED_KEY, d_key);
 730
 731     if (handled == MSG_NOT_HANDLED)
 732         dialog_handle_key (h, d_key);
 733
 734     (*h->callback) (h, DLG_POST_KEY, d_key);
 735 }
 736
 737 static int
 738 dlg_mouse_event (Dlg_head * h, Gpm_Event * event)
 739 {
 740     Widget *item;
 741     Widget *starting_widget = h->current;
 742     Gpm_Event new_event;
 743     int x = event->x;
 744     int y = event->y;
 745
 746     /* close the dialog by mouse click out of dialog area */
 747     if (mouse_close_dialog && !h->fullscreen
 748         && ((event->buttons & GPM_B_LEFT) != 0) && ((event->type & GPM_DOWN) != 0)  /* left click */
 749         && !((x > h->x) && (x <= h->x + h->cols) && (y > h->y) && (y <= h->y + h->lines))) {
 750         h->ret_value = B_CANCEL;
 751         dlg_stop (h);
 752         return MOU_NORMAL;
 753     }
 754
 755     item = starting_widget;
 756     do {
 757         Widget *widget;
 758
 759         widget = item;
 760         item = item->next;
 761
 762         if ((x > widget->x) && (x <= widget->x + widget->cols)
 763                 && (y > widget->y) && (y <= widget->y + widget->lines)) {
 764             new_event = *event;
 765             new_event.x -= widget->x;
 766             new_event.y -= widget->y;
 767
 768             if (widget->mouse != NULL)
 769                 return widget->mouse (&new_event, widget);
 770         }
 771     } while (item != starting_widget);
 772
 773     return MOU_NORMAL;
 774 }
 775
 776 /* Run dialog routines */
 777
 778 /* Init the process */
 779 void init_dlg (Dlg_head *h)
 780 {
 781     /* Initialize dialog manager and widgets */
 782     (*h->callback) (h, DLG_INIT, 0);
 783     dlg_broadcast_msg (h, WIDGET_INIT, 0);
 784
 785     if (h->x == 0 && h->y == 0 && h->cols == COLS && h->lines == LINES)
 786         h->fullscreen = 1;
 787
 788     h->parent = current_dlg;
 789     current_dlg = h;
 790
 791     /* Initialize the mouse status */
 792     h->mouse_status = MOU_NORMAL;
 793
 794     /* Select the first widget that takes focus */
 795     while (!dlg_focus (h) && h->current)
 796         h->current = h->current->next;
 797
 798     /* Redraw the screen */
 799     dlg_redraw (h);
 800
 801     h->ret_value = 0;
 802     h->running = 1;
 803 }
 804
 805 /* Shutdown the run_dlg */
 806 void dlg_run_done (Dlg_head *h)
 807 {
 808     if (h->current)
 809         (*h->callback) (h, DLG_END, 0);
 810
 811     current_dlg = h->parent;
 812 }
 813
 814 void dlg_process_event (Dlg_head *h, int key, Gpm_Event *event)
 815 {
 816     if (key == EV_NONE){
 817         if (tty_got_interrupt ())
 818             key = XCTRL('g');
 819         else
 820             return;
 821     }
 822
 823     if (key == EV_MOUSE)
 824         h->mouse_status = dlg_mouse_event (h, event);
 825     else
 826         dlg_key_event (h, key);
 827 }
 828
 829 static void
 830 frontend_run_dlg (Dlg_head *h)
 831 {
 832     int d_key;
 833     Gpm_Event event;
 834
 835     event.x = -1;
 836     while (h->running) {
 837         if (winch_flag)
 838             change_screen_size ();
 839
 840         if (is_idle ()) {
 841             if (idle_hook)
 842                 execute_hooks (idle_hook);
 843
 844             while ((h->flags & DLG_WANT_IDLE) && is_idle ())
 845                 (*h->callback) (h, DLG_IDLE, 0);
 846
 847             /* Allow terminating the dialog from the idle handler */
 848             if (!h->running)
 849                 break;
 850         }
 851
 852         update_cursor (h);
 853
 854         /* Clear interrupt flag */
 855         tty_got_interrupt ();
 856         d_key = tty_get_event (&event, h->mouse_status == MOU_REPEAT, TRUE);
 857
 858         dlg_process_event (h, d_key, &event);
 859
 860         if (!h->running)
 861             (*h->callback) (h, DLG_VALIDATE, 0);
 862     }
 863 }
 864
 865 /* Standard run dialog routine
 866  * We have to keep this routine small so that we can duplicate it's
 867  * behavior on complex routines like the file routines, this way,
 868  * they can call the dlg_process_event without rewriting all the code
 869  */
 870 int run_dlg (Dlg_head *h)
 871 {
 872     init_dlg (h);
 873     frontend_run_dlg (h);
 874     dlg_run_done (h);
 875     return h->ret_value;
 876 }
 877
 878 void
 879 destroy_dlg (Dlg_head *h)
 880 {
 881     int i;
 882     Widget *c;
 883
 884     dlg_broadcast_msg (h, WIDGET_DESTROY, 0);
 885     c = h->current;
 886     for (i = 0; i < h->count; i++) {
 887         c = c->next;
 888         g_free (h->current);
 889         h->current = c;
 890     }
 891     g_free (h->color);
 892     g_free (h->title);
 893     g_free (h);
 894
 895     do_refresh ();
 896 }
 897
 898 void widget_set_size (Widget *widget, int y, int x, int lines, int cols)
 899 {
 900     widget->x = x;
 901     widget->y = y;
 902     widget->cols = cols;
 903     widget->lines = lines;
 904     send_message (widget, WIDGET_RESIZED, 0 /* unused */);
 905 }
 906
 907 /* Replace widget old_w for widget new_w in the dialog */
 908 void
 909 dlg_replace_widget (Widget *old_w, Widget *new_w)
 910 {
 911     Dlg_head *h = old_w->parent;
 912     int should_focus = 0;
 913
 914     if (!h->current)
 915         return;
 916
 917     if (old_w == h->current)
 918         should_focus = 1;
 919
 920     new_w->parent = h;
 921     new_w->dlg_id = old_w->dlg_id;
 922
 923     if (old_w == old_w->next) {
 924         /* just one widget */
 925         new_w->prev = new_w;
 926         new_w->next = new_w;
 927     } else {
 928         new_w->prev = old_w->prev;
 929         new_w->next = old_w->next;
 930         old_w->prev->next = new_w;
 931         old_w->next->prev = new_w;
 932     }
 933
 934     if (should_focus)
 935         h->current = new_w;
 936
 937     send_message (old_w, WIDGET_DESTROY, 0);
 938     send_message (new_w, WIDGET_INIT, 0);
 939
 940     if (should_focus)
 941         dlg_select_widget (new_w);
 942
 943     send_message (new_w, WIDGET_DRAW, 0);
 944 }