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, 2009, 2010  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 "lib/global.h"
  33
  34 #include "lib/tty/tty.h"
  35 #include "lib/skin.h"
  36 #include "lib/tty/mouse.h"
  37 #include "lib/tty/key.h"
  38 #include "lib/strutil.h"
  39
  40 #include "help.h"               /* interactive_display() */
  41 #include "layout.h"
  42 #include "execute.h"            /* suspend_cmd() */
  43 #include "cmddef.h"
  44 #include "keybind.h"
  45 #include "main.h"               /* fast_refresh */
  46 #include "setup.h"              /* mouse_close_dialog */
  47 #include "dialog.h"
  48
  49 #include "dialog-switch.h"
  50
  51 /* Color styles for normal and error dialogs */
  52 int dialog_colors[4];
  53 int alarm_colors[4];
  54
  55 /* Primitive way to check if the the current dialog is our dialog */
  56 /* This is needed by async routines like load_prompt */
  57 GList *top_dlg = NULL;
  58
  59 /* A hook list for idle events */
  60 Hook *idle_hook = NULL;
  61
  62 /* left click outside of dialog closes it */
  63 int mouse_close_dialog = 0;
  64
  65 static void dlg_broadcast_msg_to (Dlg_head * h, widget_msg_t message, gboolean reverse, int flags);
  66
  67 /* draw box in window */
  68 void
  69 draw_box (Dlg_head * h, int y, int x, int ys, int xs, gboolean single)
  70 {
  71     tty_draw_box (h->y + y, h->x + x, ys, xs, single);
  72 }
  73
  74 void
  75 init_widget (Widget * w, int y, int x, int lines, int cols,
  76              callback_fn callback, mouse_h mouse_handler)
  77 {
  78     w->x = x;
  79     w->y = y;
  80     w->cols = cols;
  81     w->lines = lines;
  82     w->callback = callback;
  83     w->mouse = mouse_handler;
  84     w->owner = NULL;
  85
  86     /* Almost all widgets want to put the cursor in a suitable place */
  87     w->options = W_WANT_CURSOR;
  88 }
  89
  90 void
  91 widget_set_size (Widget * widget, int y, int x, int lines, int cols)
  92 {
  93     widget->x = x;
  94     widget->y = y;
  95     widget->cols = cols;
  96     widget->lines = lines;
  97     send_message (widget, WIDGET_RESIZED, 0 /* unused */ );
  98 }
  99
 100 void
 101 widget_erase (Widget * w)
 102 {
 103     if (w != NULL)
 104         tty_fill_region (w->y, w->x, w->lines, w->cols, ' ');
 105 }
 106
 107 /* Clean the dialog area, draw the frame and the title */
 108 void
 109 common_dialog_repaint (struct Dlg_head *h)
 110 {
 111     int space;
 112
 113     space = (h->flags & DLG_COMPACT) ? 0 : 1;
 114
 115     tty_setcolor (DLG_NORMALC (h));
 116     dlg_erase (h);
 117     draw_box (h, space, space, h->lines - 2 * space, h->cols - 2 * space, FALSE);
 118
 119     if (h->title)
 120     {
 121         tty_setcolor (DLG_HOT_NORMALC (h));
 122         dlg_move (h, space, (h->cols - str_term_width1 (h->title)) / 2);
 123         tty_print_string (h->title);
 124     }
 125 }
 126
 127 /* this function allows to set dialog position */
 128 void
 129 dlg_set_position (Dlg_head * h, int y1, int x1, int y2, int x2)
 130 {
 131     /* save old positions, will be used to reposition childs */
 132     int ox, oy, oc, ol;
 133     int shift_x, shift_y, scale_x, scale_y;
 134
 135     /* save old positions, will be used to reposition childs */
 136     ox = h->x;
 137     oy = h->y;
 138     oc = h->cols;
 139     ol = h->lines;
 140
 141     h->x = x1;
 142     h->y = y1;
 143     h->lines = y2 - y1;
 144     h->cols = x2 - x1;
 145
 146     /* dialog is empty */
 147     if (h->widgets == NULL)
 148         return;
 149
 150     if (h->current == NULL)
 151         h->current = h->widgets;
 152
 153     /* values by which controls should be moved */
 154     shift_x = h->x - ox;
 155     shift_y = h->y - oy;
 156     scale_x = h->cols - oc;
 157     scale_y = h->lines - ol;
 158
 159     if ((shift_x != 0) || (shift_y != 0) || (scale_x != 0) || (scale_y != 0))
 160     {
 161         GList *w;
 162
 163         for (w = h->widgets; w != NULL; w = g_list_next (w))
 164         {
 165             /* there are, mainly, 2 generally possible
 166                situations:
 167
 168                1. control sticks to one side - it
 169                should be moved
 170
 171                2. control sticks to two sides of
 172                one direction - it should be sized */
 173
 174             Widget *c = (Widget *) w->data;
 175             int x = c->x;
 176             int y = c->y;
 177             int cols = c->cols;
 178             int lines = c->lines;
 179
 180             if ((c->pos_flags & WPOS_KEEP_LEFT) && (c->pos_flags & WPOS_KEEP_RIGHT))
 181             {
 182                 x += shift_x;
 183                 cols += scale_x;
 184             }
 185             else if (c->pos_flags & WPOS_KEEP_LEFT)
 186                 x += shift_x;
 187             else if (c->pos_flags & WPOS_KEEP_RIGHT)
 188                 x += shift_x + scale_x;
 189
 190             if ((c->pos_flags & WPOS_KEEP_TOP) && (c->pos_flags & WPOS_KEEP_BOTTOM))
 191             {
 192                 y += shift_y;
 193                 lines += scale_y;
 194             }
 195             else if (c->pos_flags & WPOS_KEEP_TOP)
 196                 y += shift_y;
 197             else if (c->pos_flags & WPOS_KEEP_BOTTOM)
 198                 y += shift_y + scale_y;
 199
 200             widget_set_size (c, y, x, lines, cols);
 201         }
 202     }
 203 }
 204
 205 /* this function sets only size, leaving positioning to automatic methods */
 206 void
 207 dlg_set_size (Dlg_head * h, int lines, int cols)
 208 {
 209     int x = h->x;
 210     int y = h->y;
 211
 212     if (h->flags & DLG_CENTER)
 213     {
 214         y = (LINES - lines) / 2;
 215         x = (COLS - cols) / 2;
 216     }
 217
 218     if ((h->flags & DLG_TRYUP) && (y > 3))
 219         y -= 2;
 220
 221     dlg_set_position (h, y, x, y + lines, x + cols);
 222 }
 223
 224 /* Default dialog callback */
 225 cb_ret_t
 226 default_dlg_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data)
 227 {
 228     (void) sender;
 229     (void) parm;
 230     (void) data;
 231
 232     switch (msg)
 233     {
 234     case DLG_DRAW:
 235         if (h->color != NULL)
 236         {
 237             common_dialog_repaint (h);
 238             return MSG_HANDLED;
 239         }
 240         return MSG_NOT_HANDLED;
 241
 242     case DLG_IDLE:
 243         dlg_broadcast_msg_to (h, WIDGET_IDLE, FALSE, W_WANT_IDLE);
 244         return MSG_HANDLED;
 245
 246     case DLG_RESIZE:
 247         /* this is default resizing mechanism */
 248         /* the main idea of this code is to resize dialog
 249            according to flags (if any of flags require automatic
 250            resizing, like DLG_CENTER, end after that reposition
 251            controls in dialog according to flags of widget) */
 252         dlg_set_size (h, h->lines, h->cols);
 253         return MSG_HANDLED;
 254
 255     default:
 256         break;
 257     }
 258
 259     return MSG_NOT_HANDLED;
 260 }
 261
 262 Dlg_head *
 263 create_dlg (gboolean modal, int y1, int x1, int lines, int cols,
 264             const int *colors, dlg_cb_fn callback, const char *help_ctx,
 265             const char *title, dlg_flags_t flags)
 266 {
 267     Dlg_head *new_d;
 268
 269     new_d = g_new0 (Dlg_head, 1);
 270     new_d->modal = modal;
 271     if (colors != NULL)
 272     {
 273         new_d->color = g_new (int, DLG_COLOR_NUM);
 274         memmove (new_d->color, colors, sizeof (int) * DLG_COLOR_NUM);
 275     }
 276     new_d->help_ctx = help_ctx;
 277     new_d->callback = (callback != NULL) ? callback : default_dlg_callback;
 278     new_d->x = x1;
 279     new_d->y = y1;
 280     new_d->flags = flags;
 281     new_d->data = NULL;
 282
 283     dlg_set_size (new_d, lines, cols);
 284     new_d->fullscreen = (new_d->x == 0 && new_d->y == 0
 285                          && new_d->cols == COLS && new_d->lines == LINES);
 286
 287     new_d->mouse_status = MOU_NORMAL;
 288
 289     /* Strip existing spaces, add one space before and after the title */
 290     if (title != NULL)
 291     {
 292         char *t;
 293
 294         t = g_strstrip (g_strdup (title));
 295         if (*t != '\0')
 296             new_d->title = g_strdup_printf (" %s ", t);
 297         g_free (t);
 298     }
 299
 300     return new_d;
 301 }
 302
 303 void
 304 dlg_set_default_colors (void)
 305 {
 306     dialog_colors[0] = COLOR_NORMAL;
 307     dialog_colors[1] = COLOR_FOCUS;
 308     dialog_colors[2] = COLOR_HOT_NORMAL;
 309     dialog_colors[3] = COLOR_HOT_FOCUS;
 310
 311     alarm_colors[0] = ERROR_COLOR;
 312     alarm_colors[1] = REVERSE_COLOR;
 313     alarm_colors[2] = ERROR_HOT_NORMAL;
 314     alarm_colors[3] = ERROR_HOT_FOCUS;
 315 }
 316
 317 void
 318 dlg_erase (Dlg_head * h)
 319 {
 320     if (h != NULL)
 321         tty_fill_region (h->y, h->x, h->lines, h->cols, ' ');
 322 }
 323
 324 void
 325 set_idle_proc (Dlg_head * d, int enable)
 326 {
 327     if (enable)
 328         d->flags |= DLG_WANT_IDLE;
 329     else
 330         d->flags &= ~DLG_WANT_IDLE;
 331 }
 332
 333 /*
 334  * Insert widget to dialog before current widget.  For dialogs populated
 335  * from the bottom, make the widget current.  Return widget number.
 336  */
 337 int
 338 add_widget_autopos (Dlg_head * h, void *w, widget_pos_flags_t pos_flags)
 339 {
 340     Widget *widget = (Widget *) w;
 341
 342     /* Don't accept 0 widgets */
 343     if (w == NULL)
 344         abort ();
 345
 346     widget->x += h->x;
 347     widget->y += h->y;
 348     widget->owner = h;
 349     widget->pos_flags = pos_flags;
 350     widget->id = g_list_length (h->widgets);
 351
 352     if ((h->flags & DLG_REVERSE) != 0)
 353         h->widgets = g_list_prepend (h->widgets, widget);
 354     else
 355         h->widgets = g_list_append (h->widgets, widget);
 356
 357     h->current = h->widgets;
 358
 359     return widget->id;
 360 }
 361
 362 /* wrapper to simply add lefttop positioned controls */
 363 int
 364 add_widget (Dlg_head * h, void *w)
 365 {
 366     return add_widget_autopos (h, w, WPOS_KEEP_LEFT | WPOS_KEEP_TOP);
 367 }
 368
 369 void
 370 do_refresh (void)
 371 {
 372     GList *d = top_dlg;
 373
 374     if (fast_refresh)
 375     {
 376         if ((d != NULL) && (d->data != NULL))
 377             dlg_redraw ((Dlg_head *) d->data);
 378     }
 379     else
 380     {
 381         /* Search first fullscreen dialog */
 382         for (; d != NULL; d = g_list_next (d))
 383             if ((d->data != NULL) && ((Dlg_head *) d->data)->fullscreen)
 384                 break;
 385         /* back to top dialog */
 386         for (; d != NULL; d = g_list_previous (d))
 387             if (d->data != NULL)
 388                 dlg_redraw ((Dlg_head *) d->data);
 389     }
 390 }
 391
 392 /* broadcast a message to all the widgets in a dialog that have
 393  * the options set to flags. If flags is zero, the message is sent
 394  * to all widgets.
 395  */
 396 static void
 397 dlg_broadcast_msg_to (Dlg_head * h, widget_msg_t message, gboolean reverse, int flags)
 398 {
 399     GList *p, *first;
 400
 401     if (h->widgets == NULL)
 402         return;
 403
 404     if (h->current == NULL)
 405         h->current = h->widgets;
 406
 407     if (reverse)
 408     {
 409         p = g_list_previous (h->current);
 410
 411         if (p == NULL)
 412             p = g_list_last (h->widgets);
 413     }
 414     else
 415     {
 416         p = g_list_next (h->current);
 417
 418         if (p == NULL)
 419             p = h->widgets;
 420     }
 421
 422     first = p;
 423
 424     do
 425     {
 426         Widget *w = (Widget *) p->data;
 427
 428         if (reverse)
 429         {
 430             p = g_list_previous (p);
 431
 432             if (p == NULL)
 433                 p = g_list_last (h->widgets);
 434         }
 435         else
 436         {
 437             p = g_list_next (p);
 438
 439             if (p == NULL)
 440                 p = h->widgets;
 441         }
 442
 443         if ((flags == 0) || ((flags & w->options) != 0))
 444             send_message (w, message, 0);
 445     }
 446     while (first != p);
 447 }
 448
 449 /* broadcast a message to all the widgets in a dialog */
 450 void
 451 dlg_broadcast_msg (Dlg_head * h, widget_msg_t message, gboolean reverse)
 452 {
 453     dlg_broadcast_msg_to (h, message, reverse, 0);
 454 }
 455
 456 int
 457 dlg_focus (Dlg_head * h)
 458 {
 459     if ((h->current != NULL)
 460         && (send_message ((Widget *) h->current->data, WIDGET_FOCUS, 0) == MSG_HANDLED))
 461     {
 462         h->callback (h, (Widget *) h->current->data, DLG_FOCUS, 0, NULL);
 463         return 1;
 464     }
 465     return 0;
 466 }
 467
 468 static int
 469 dlg_unfocus (Dlg_head * h)
 470 {
 471     if ((h->current != NULL)
 472         && (send_message ((Widget *) h->current->data, WIDGET_UNFOCUS, 0) == MSG_HANDLED))
 473     {
 474         h->callback (h, (Widget *) h->current->data, DLG_UNFOCUS, 0, NULL);
 475         return 1;
 476     }
 477     return 0;
 478 }
 479
 480 /* Return true if the windows overlap */
 481 int
 482 dlg_overlap (Widget * a, Widget * b)
 483 {
 484     return !((b->x >= a->x + a->cols)
 485              || (a->x >= b->x + b->cols) || (b->y >= a->y + a->lines) || (a->y >= b->y + b->lines));
 486 }
 487
 488 static int
 489 dlg_find_widget_callback (const void *a, const void *b)
 490 {
 491     const Widget *w = (const Widget *) a;
 492     callback_fn f = (callback_fn) b;
 493
 494     return (w->callback == f) ? 0 : 1;
 495 }
 496
 497 /* Find the widget with the given callback in the dialog h */
 498 Widget *
 499 find_widget_type (const Dlg_head * h, callback_fn callback)
 500 {
 501     GList *w;
 502
 503     w = g_list_find_custom (h->widgets, callback, dlg_find_widget_callback);
 504
 505     return (w == NULL) ? NULL : (Widget *) w->data;
 506 }
 507
 508 /* Find the widget with the given dialog id in the dialog h and select it */
 509 void
 510 dlg_select_by_id (const Dlg_head * h, unsigned int id)
 511 {
 512     if (h->widgets != NULL)
 513     {
 514         Widget *w_found;
 515
 516         w_found = (Widget *) g_list_nth_data (h->widgets, id);
 517
 518         if (w_found != NULL)
 519             dlg_select_widget (w_found);
 520     }
 521 }
 522
 523
 524 /* What to do if the requested widget doesn't take focus */
 525 typedef enum
 526 {
 527     SELECT_NEXT,                /* go the the next widget */
 528     SELECT_PREV,                /* go the the previous widget */
 529     SELECT_EXACT                /* use current widget */
 530 } select_dir_t;
 531
 532 /*
 533  * Try to select another widget.  If forward is set, follow tab order.
 534  * Otherwise go to the previous widget.
 535  */
 536 static void
 537 do_select_widget (Dlg_head * h, GList * w, select_dir_t dir)
 538 {
 539     Widget *w0 = (Widget *) h->current->data;
 540
 541     if (!dlg_unfocus (h))
 542         return;
 543
 544     h->current = w;
 545
 546     do
 547     {
 548         if (dlg_focus (h))
 549             break;
 550
 551         switch (dir)
 552         {
 553         case SELECT_NEXT:
 554             h->current = g_list_next (h->current);
 555             if (h->current == NULL)
 556                 h->current = h->widgets;
 557             break;
 558         case SELECT_PREV:
 559             h->current = g_list_previous (h->current);
 560             if (h->current == NULL)
 561                 h->current = g_list_last (h->widgets);
 562             break;
 563         case SELECT_EXACT:
 564             h->current = g_list_find (h->widgets, w0);
 565             dlg_focus (h);
 566             return;
 567         }
 568     }
 569     while (h->current != w);
 570
 571     if (dlg_overlap (w0, (Widget *) h->current->data))
 572     {
 573         send_message ((Widget *) h->current->data, WIDGET_DRAW, 0);
 574         send_message ((Widget *) h->current->data, WIDGET_FOCUS, 0);
 575     }
 576 }
 577
 578 /*
 579  * Try to select widget in the dialog.
 580  */
 581 void
 582 dlg_select_widget (void *w)
 583 {
 584     const Widget *widget = (Widget *) w;
 585     Dlg_head *h = widget->owner;
 586
 587     do_select_widget (h, g_list_find (h->widgets, widget), SELECT_NEXT);
 588 }
 589
 590 /* Try to select previous widget in the tab order */
 591 void
 592 dlg_one_up (Dlg_head * h)
 593 {
 594     if (h->widgets != NULL)
 595     {
 596         GList *prev;
 597
 598         prev = g_list_previous (h->current);
 599         if (prev == NULL)
 600             prev = g_list_last (h->widgets);
 601
 602         do_select_widget (h, prev, SELECT_PREV);
 603     }
 604 }
 605
 606 /* Try to select next widget in the tab order */
 607 void
 608 dlg_one_down (Dlg_head * h)
 609 {
 610     if (h->widgets != NULL)
 611     {
 612         GList *next;
 613
 614         next = g_list_next (h->current);
 615         if (next == NULL)
 616             next = h->widgets;
 617         do_select_widget (h, next, SELECT_NEXT);
 618     }
 619 }
 620
 621 void
 622 update_cursor (Dlg_head * h)
 623 {
 624     GList *p = h->current;
 625
 626     if (p != NULL)
 627     {
 628         if (((Widget *) (p->data))->options & W_WANT_CURSOR)
 629             send_message ((Widget *) p->data, WIDGET_CURSOR, 0);
 630         else
 631             do
 632             {
 633                 p = g_list_next (p);
 634                 if (p == NULL)
 635                     p = h->widgets;
 636
 637                 if (p == h->current)
 638                     break;
 639
 640                 if (((Widget *) (p->data))->options & W_WANT_CURSOR)
 641                     if (send_message ((Widget *) p->data, WIDGET_CURSOR, 0) == MSG_HANDLED)
 642                         break;
 643             }
 644             while (TRUE);
 645     }
 646 }
 647
 648 /* Redraw the widgets in reverse order, leaving the current widget
 649  * as the last one
 650  */
 651 void
 652 dlg_redraw (Dlg_head * h)
 653 {
 654     h->callback (h, NULL, DLG_DRAW, 0, NULL);
 655     dlg_broadcast_msg (h, WIDGET_DRAW, TRUE);
 656     update_cursor (h);
 657 }
 658
 659 void
 660 dlg_stop (Dlg_head * h)
 661 {
 662     h->state = DLG_CLOSED;
 663 }
 664
 665 static void
 666 refresh_cmd (void)
 667 {
 668 #ifdef HAVE_SLANG
 669         tty_touch_screen ();
 670         mc_refresh ();
 671 #else
 672         /* Use this if the refreshes fail */
 673         clr_scr ();
 674         repaint_screen ();
 675 #endif /* HAVE_SLANG */
 676 }
 677
 678 static cb_ret_t
 679 dlg_execute_cmd (Dlg_head * h, unsigned long command)
 680 {
 681     cb_ret_t ret = MSG_HANDLED;
 682     switch (command)
 683     {
 684     case CK_DialogOK:
 685         h->ret_value = B_ENTER;
 686         dlg_stop (h);
 687         break;
 688     case CK_DialogCancel:
 689         h->ret_value = B_CANCEL;
 690         dlg_stop (h);
 691         break;
 692
 693     case CK_DialogPrevItem:
 694         dlg_one_up (h);
 695         break;
 696     case CK_DialogNextItem:
 697         dlg_one_down (h);
 698         break;
 699
 700     case CK_DialogHelp:
 701         interactive_display (NULL, h->help_ctx);
 702         do_refresh ();
 703         break;
 704
 705     case CK_DialogSuspend:
 706         suspend_cmd ();
 707         refresh_cmd ();
 708         break;
 709     case CK_DialogRefresh:
 710         refresh_cmd ();
 711         break;
 712
 713     case CK_DialogListCmd:
 714         if (!h->modal)
 715             dialog_switch_list ();
 716         else
 717             ret = MSG_NOT_HANDLED;
 718         break;
 719     case CK_DialogNextCmd:
 720         if (!h->modal)
 721             dialog_switch_next ();
 722         else
 723             ret = MSG_NOT_HANDLED;
 724         break;
 725     case CK_DialogPrevCmd:
 726         if (!h->modal)
 727             dialog_switch_prev ();
 728         else
 729             ret = MSG_NOT_HANDLED;
 730         break;
 731
 732     default:
 733         ret = MSG_NOT_HANDLED;
 734     }
 735
 736     return ret;
 737 }
 738
 739 static cb_ret_t
 740 dlg_handle_key (Dlg_head * h, int d_key)
 741 {
 742     unsigned long command;
 743     command = lookup_keymap_command (dialog_map, d_key);
 744     if ((command == CK_Ignore_Key) || (dlg_execute_cmd (h, command) == MSG_NOT_HANDLED))
 745         return MSG_NOT_HANDLED;
 746     else
 747         return MSG_HANDLED;
 748 }
 749
 750 static int
 751 dlg_mouse_event (Dlg_head * h, Gpm_Event * event)
 752 {
 753     GList *item;
 754     GList *starting_widget = h->current;
 755     Gpm_Event new_event;
 756     int x = event->x;
 757     int y = event->y;
 758
 759     /* close the dialog by mouse click out of dialog area */
 760     if (mouse_close_dialog && !h->fullscreen && ((event->buttons & GPM_B_LEFT) != 0) && ((event->type & GPM_DOWN) != 0) /* left click */
 761         && !((x > h->x) && (x <= h->x + h->cols) && (y > h->y) && (y <= h->y + h->lines)))
 762     {
 763         h->ret_value = B_CANCEL;
 764         dlg_stop (h);
 765         return MOU_NORMAL;
 766     }
 767
 768     item = starting_widget;
 769     do
 770     {
 771         Widget *widget;
 772
 773         widget = (Widget *) item->data;
 774         item = g_list_next (item);
 775         if (item == NULL)
 776             item = h->widgets;
 777
 778         if ((x > widget->x) && (x <= widget->x + widget->cols)
 779             && (y > widget->y) && (y <= widget->y + widget->lines))
 780         {
 781             new_event = *event;
 782             new_event.x -= widget->x;
 783             new_event.y -= widget->y;
 784
 785             if (widget->mouse != NULL)
 786                 return widget->mouse (&new_event, widget);
 787         }
 788     }
 789     while (item != starting_widget);
 790
 791     return MOU_NORMAL;
 792 }
 793
 794 static cb_ret_t
 795 dlg_try_hotkey (Dlg_head * h, int d_key)
 796 {
 797     GList *hot_cur;
 798     cb_ret_t handled;
 799     int c;
 800
 801     if (h->widgets == NULL)
 802         return MSG_NOT_HANDLED;
 803
 804     if (h->current == NULL)
 805         h->current = h->widgets;
 806
 807     /*
 808      * Explanation: we don't send letter hotkeys to other widgets if
 809      * the currently selected widget is an input line
 810      */
 811
 812     if (((Widget *) h->current->data)->options & W_IS_INPUT)
 813     {
 814         /* skip ascii control characters, anything else can valid character in
 815          * some encoding */
 816         if (d_key >= 32 && d_key < 256)
 817             return MSG_NOT_HANDLED;
 818     }
 819
 820     /* If it's an alt key, send the message */
 821     c = d_key & ~ALT (0);
 822     if (d_key & ALT (0) && g_ascii_isalpha (c))
 823         d_key = g_ascii_tolower (c);
 824
 825     handled = MSG_NOT_HANDLED;
 826     if (((Widget *) h->current->data)->options & W_WANT_HOTKEY)
 827         handled = send_message ((Widget *) h->current->data, WIDGET_HOTKEY, d_key);
 828
 829     /* If not used, send hotkey to other widgets */
 830     if (handled == MSG_HANDLED)
 831         return MSG_HANDLED;
 832
 833     hot_cur = g_list_next (h->current);
 834     if (hot_cur == NULL)
 835         hot_cur = h->widgets;
 836
 837     /* send it to all widgets */
 838     while (h->current != hot_cur && handled == MSG_NOT_HANDLED)
 839     {
 840         if (((Widget *) hot_cur->data)->options & W_WANT_HOTKEY)
 841             handled = send_message ((Widget *) hot_cur->data, WIDGET_HOTKEY, d_key);
 842
 843         if (handled == MSG_NOT_HANDLED)
 844         {
 845             hot_cur = g_list_next (hot_cur);
 846             if (hot_cur == NULL)
 847                 hot_cur = h->widgets;
 848         }
 849     }
 850
 851     if (handled == MSG_HANDLED)
 852         do_select_widget (h, hot_cur, SELECT_EXACT);
 853
 854     return handled;
 855 }
 856
 857 static void
 858 dlg_key_event (Dlg_head * h, int d_key)
 859 {
 860     cb_ret_t handled;
 861
 862     if (h->widgets == NULL)
 863         return;
 864
 865     if (h->current == NULL)
 866         h->current = h->widgets;
 867
 868     /* TAB used to cycle */
 869     if ((h->flags & DLG_WANT_TAB) == 0)
 870     {
 871         if (d_key == '\t')
 872         {
 873             dlg_one_down (h);
 874             return;
 875         }
 876         else if (d_key == KEY_BTAB)
 877         {
 878             dlg_one_up (h);
 879             return;
 880         }
 881     }
 882
 883     /* first can dlg_callback handle the key */
 884     handled = h->callback (h, NULL, DLG_KEY, d_key, NULL);
 885
 886     /* next try the hotkey */
 887     if (handled == MSG_NOT_HANDLED)
 888         handled = dlg_try_hotkey (h, d_key);
 889
 890     if (handled == MSG_HANDLED)
 891         h->callback (h, NULL, DLG_HOTKEY_HANDLED, 0, NULL);
 892     else
 893         /* not used - then try widget_callback */
 894         handled = send_message ((Widget *) h->current->data, WIDGET_KEY, d_key);
 895
 896     /* not used- try to use the unhandled case */
 897     if (handled == MSG_NOT_HANDLED)
 898         handled = h->callback (h, NULL, DLG_UNHANDLED_KEY, d_key, NULL);
 899
 900     if (handled == MSG_NOT_HANDLED)
 901         handled = dlg_handle_key (h, d_key);
 902
 903     h->callback (h, NULL, DLG_POST_KEY, d_key, NULL);
 904 }
 905
 906 /* Init the process */
 907 void
 908 init_dlg (Dlg_head * h)
 909 {
 910     if ((top_dlg != NULL) && ((Dlg_head *) top_dlg->data)->modal)
 911         h->modal = TRUE;
 912
 913
 914     /* add dialog to the stack */
 915     top_dlg = g_list_prepend (top_dlg, h);
 916
 917     /* Initialize dialog manager and widgets */
 918     if (h->state == DLG_ACTIVE)
 919     {
 920         if (!h->modal)
 921             dialog_switch_add (h);
 922
 923         h->callback (h, NULL, DLG_INIT, 0, NULL);
 924         dlg_broadcast_msg (h, WIDGET_INIT, FALSE);
 925     }
 926
 927     h->state = DLG_ACTIVE;
 928
 929     dlg_redraw (h);
 930
 931     /* Select the first widget that takes focus */
 932     while (h->current != NULL && !dlg_focus (h))
 933     {
 934         h->current = g_list_next (h->current);
 935         if (h->current == NULL)
 936             h->current = h->widgets;
 937     }
 938
 939     h->ret_value = 0;
 940 }
 941
 942 void
 943 dlg_process_event (Dlg_head * h, int key, Gpm_Event * event)
 944 {
 945     if (key == EV_NONE)
 946     {
 947         if (tty_got_interrupt ())
 948             dlg_execute_cmd (h, CK_DialogCancel);
 949
 950         return;
 951     }
 952
 953     if (key == EV_MOUSE)
 954         h->mouse_status = dlg_mouse_event (h, event);
 955     else
 956         dlg_key_event (h, key);
 957 }
 958
 959 static void
 960 frontend_run_dlg (Dlg_head * h)
 961 {
 962     int d_key;
 963     Gpm_Event event;
 964
 965     event.x = -1;
 966     while (h->state == DLG_ACTIVE)
 967     {
 968         if (winch_flag)
 969             change_screen_size ();
 970
 971         if (is_idle ())
 972         {
 973             if (idle_hook)
 974                 execute_hooks (idle_hook);
 975
 976             while ((h->flags & DLG_WANT_IDLE) && is_idle ())
 977                 h->callback (h, NULL, DLG_IDLE, 0, NULL);
 978
 979             /* Allow terminating the dialog from the idle handler */
 980             if (h->state != DLG_ACTIVE)
 981                 break;
 982         }
 983
 984         update_cursor (h);
 985
 986         /* Clear interrupt flag */
 987         tty_got_interrupt ();
 988         d_key = tty_get_event (&event, h->mouse_status == MOU_REPEAT, TRUE);
 989
 990         dlg_process_event (h, d_key, &event);
 991
 992         if (h->state == DLG_CLOSED)
 993             h->callback (h, NULL, DLG_VALIDATE, 0, NULL);
 994     }
 995 }
 996
 997 /* Shutdown the run_dlg */
 998 void
 999 dlg_run_done (Dlg_head * h)
1000 {
1001     if (h->state == DLG_CLOSED)
1002     {
1003         h->callback (h, (Widget *) h->current->data, DLG_END, 0, NULL);
1004         if (!h->modal)
1005             dialog_switch_remove (h);
1006     }
1007
1008     top_dlg = g_list_remove (top_dlg, h);
1009 }
1010
1011 /* Standard run dialog routine
1012  * We have to keep this routine small so that we can duplicate it's
1013  * behavior on complex routines like the file routines, this way,
1014  * they can call the dlg_process_event without rewriting all the code
1015  */
1016 int
1017 run_dlg (Dlg_head * h)
1018 {
1019     init_dlg (h);
1020     frontend_run_dlg (h);
1021     dlg_run_done (h);
1022     return h->ret_value;
1023 }
1024
1025 void
1026 destroy_dlg (Dlg_head * h)
1027 {
1028     dlg_broadcast_msg (h, WIDGET_DESTROY, FALSE);
1029     g_list_foreach (h->widgets, (GFunc) g_free, NULL);
1030     g_list_free (h->widgets);
1031     g_free (h->color);
1032     g_free (h->title);
1033     g_free (h);
1034
1035     do_refresh ();
1036 }
1037
1038 char *
1039 dlg_get_title (const Dlg_head *h, size_t len)
1040 {
1041     char *t;
1042
1043     if (h == NULL)
1044         abort ();
1045
1046     if (h->get_title != NULL)
1047         t = h->get_title (h, len);
1048     else
1049         t = g_strdup ("");
1050
1051     return t;
1052 }
1053
1054 /* Replace widget old_w for widget new_w in the dialog */
1055 void
1056 dlg_replace_widget (Widget * old_w, Widget * new_w)
1057 {
1058     Dlg_head *h = old_w->owner;
1059     gboolean should_focus = FALSE;
1060
1061     if (h->widgets == NULL)
1062         return;
1063
1064     if (h->current == NULL)
1065         h->current = h->widgets;
1066
1067     if (old_w == h->current->data)
1068         should_focus = TRUE;
1069
1070     new_w->owner = h;
1071     new_w->id = old_w->id;
1072
1073     if (should_focus)
1074         h->current->data = new_w;
1075     else
1076         g_list_find (h->widgets, old_w)->data = new_w;
1077
1078     send_message (old_w, WIDGET_DESTROY, 0);
1079     send_message (new_w, WIDGET_INIT, 0);
1080
1081     if (should_focus)
1082         dlg_select_widget (new_w);
1083
1084     send_message (new_w, WIDGET_DRAW, 0);
1085 }