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 (Dlg_head *h)
 110 {
 111     int space;
 112
 113     if (h->state != DLG_ACTIVE)
 114         return;
 115
 116     space = (h->flags & DLG_COMPACT) ? 0 : 1;
 117
 118     tty_setcolor (DLG_NORMALC (h));
 119     dlg_erase (h);
 120     draw_box (h, space, space, h->lines - 2 * space, h->cols - 2 * space, FALSE);
 121
 122     if (h->title != NULL)
 123     {
 124         tty_setcolor (DLG_HOT_NORMALC (h));
 125         dlg_move (h, space, (h->cols - str_term_width1 (h->title)) / 2);
 126         tty_print_string (h->title);
 127     }
 128 }
 129
 130 /* this function allows to set dialog position */
 131 void
 132 dlg_set_position (Dlg_head * h, int y1, int x1, int y2, int x2)
 133 {
 134     /* save old positions, will be used to reposition childs */
 135     int ox, oy, oc, ol;
 136     int shift_x, shift_y, scale_x, scale_y;
 137
 138     /* save old positions, will be used to reposition childs */
 139     ox = h->x;
 140     oy = h->y;
 141     oc = h->cols;
 142     ol = h->lines;
 143
 144     h->x = x1;
 145     h->y = y1;
 146     h->lines = y2 - y1;
 147     h->cols = x2 - x1;
 148
 149     /* dialog is empty */
 150     if (h->widgets == NULL)
 151         return;
 152
 153     if (h->current == NULL)
 154         h->current = h->widgets;
 155
 156     /* values by which controls should be moved */
 157     shift_x = h->x - ox;
 158     shift_y = h->y - oy;
 159     scale_x = h->cols - oc;
 160     scale_y = h->lines - ol;
 161
 162     if ((shift_x != 0) || (shift_y != 0) || (scale_x != 0) || (scale_y != 0))
 163     {
 164         GList *w;
 165
 166         for (w = h->widgets; w != NULL; w = g_list_next (w))
 167         {
 168             /* there are, mainly, 2 generally possible
 169                situations:
 170
 171                1. control sticks to one side - it
 172                should be moved
 173
 174                2. control sticks to two sides of
 175                one direction - it should be sized */
 176
 177             Widget *c = (Widget *) w->data;
 178             int x = c->x;
 179             int y = c->y;
 180             int cols = c->cols;
 181             int lines = c->lines;
 182
 183             if ((c->pos_flags & WPOS_KEEP_LEFT) && (c->pos_flags & WPOS_KEEP_RIGHT))
 184             {
 185                 x += shift_x;
 186                 cols += scale_x;
 187             }
 188             else if (c->pos_flags & WPOS_KEEP_LEFT)
 189                 x += shift_x;
 190             else if (c->pos_flags & WPOS_KEEP_RIGHT)
 191                 x += shift_x + scale_x;
 192
 193             if ((c->pos_flags & WPOS_KEEP_TOP) && (c->pos_flags & WPOS_KEEP_BOTTOM))
 194             {
 195                 y += shift_y;
 196                 lines += scale_y;
 197             }
 198             else if (c->pos_flags & WPOS_KEEP_TOP)
 199                 y += shift_y;
 200             else if (c->pos_flags & WPOS_KEEP_BOTTOM)
 201                 y += shift_y + scale_y;
 202
 203             widget_set_size (c, y, x, lines, cols);
 204         }
 205     }
 206 }
 207
 208 /* this function sets only size, leaving positioning to automatic methods */
 209 void
 210 dlg_set_size (Dlg_head * h, int lines, int cols)
 211 {
 212     int x = h->x;
 213     int y = h->y;
 214
 215     if (h->flags & DLG_CENTER)
 216     {
 217         y = (LINES - lines) / 2;
 218         x = (COLS - cols) / 2;
 219     }
 220
 221     if ((h->flags & DLG_TRYUP) && (y > 3))
 222         y -= 2;
 223
 224     dlg_set_position (h, y, x, y + lines, x + cols);
 225 }
 226
 227 /* Default dialog callback */
 228 cb_ret_t
 229 default_dlg_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *data)
 230 {
 231     (void) sender;
 232     (void) parm;
 233     (void) data;
 234
 235     switch (msg)
 236     {
 237     case DLG_DRAW:
 238         if (h->color != NULL)
 239         {
 240             common_dialog_repaint (h);
 241             return MSG_HANDLED;
 242         }
 243         return MSG_NOT_HANDLED;
 244
 245     case DLG_IDLE:
 246         dlg_broadcast_msg_to (h, WIDGET_IDLE, FALSE, W_WANT_IDLE);
 247         return MSG_HANDLED;
 248
 249     case DLG_RESIZE:
 250         /* this is default resizing mechanism */
 251         /* the main idea of this code is to resize dialog
 252            according to flags (if any of flags require automatic
 253            resizing, like DLG_CENTER, end after that reposition
 254            controls in dialog according to flags of widget) */
 255         dlg_set_size (h, h->lines, h->cols);
 256         return MSG_HANDLED;
 257
 258     default:
 259         break;
 260     }
 261
 262     return MSG_NOT_HANDLED;
 263 }
 264
 265 Dlg_head *
 266 create_dlg (gboolean modal, int y1, int x1, int lines, int cols,
 267             const int *colors, dlg_cb_fn callback, const char *help_ctx,
 268             const char *title, dlg_flags_t flags)
 269 {
 270     Dlg_head *new_d;
 271
 272     new_d = g_new0 (Dlg_head, 1);
 273     new_d->modal = modal;
 274     if (colors != NULL)
 275     {
 276         new_d->color = g_new (int, DLG_COLOR_NUM);
 277         memmove (new_d->color, colors, sizeof (int) * DLG_COLOR_NUM);
 278     }
 279     new_d->help_ctx = help_ctx;
 280     new_d->callback = (callback != NULL) ? callback : default_dlg_callback;
 281     new_d->x = x1;
 282     new_d->y = y1;
 283     new_d->flags = flags;
 284     new_d->data = NULL;
 285
 286     dlg_set_size (new_d, lines, cols);
 287     new_d->fullscreen = (new_d->x == 0 && new_d->y == 0
 288                          && new_d->cols == COLS && new_d->lines == LINES);
 289
 290     new_d->mouse_status = MOU_NORMAL;
 291
 292     /* Strip existing spaces, add one space before and after the title */
 293     if (title != NULL)
 294     {
 295         char *t;
 296
 297         t = g_strstrip (g_strdup (title));
 298         if (*t != '\0')
 299             new_d->title = g_strdup_printf (" %s ", t);
 300         g_free (t);
 301     }
 302
 303     return new_d;
 304 }
 305
 306 void
 307 dlg_set_default_colors (void)
 308 {
 309     dialog_colors[0] = COLOR_NORMAL;
 310     dialog_colors[1] = COLOR_FOCUS;
 311     dialog_colors[2] = COLOR_HOT_NORMAL;
 312     dialog_colors[3] = COLOR_HOT_FOCUS;
 313
 314     alarm_colors[0] = ERROR_COLOR;
 315     alarm_colors[1] = REVERSE_COLOR;
 316     alarm_colors[2] = ERROR_HOT_NORMAL;
 317     alarm_colors[3] = ERROR_HOT_FOCUS;
 318 }
 319
 320 void
 321 dlg_erase (Dlg_head * h)
 322 {
 323     if ((h != NULL) && (h->state == DLG_ACTIVE))
 324         tty_fill_region (h->y, h->x, h->lines, h->cols, ' ');
 325 }
 326
 327 void
 328 set_idle_proc (Dlg_head * d, int enable)
 329 {
 330     if (enable)
 331         d->flags |= DLG_WANT_IDLE;
 332     else
 333         d->flags &= ~DLG_WANT_IDLE;
 334 }
 335
 336 /*
 337  * Insert widget to dialog before current widget.  For dialogs populated
 338  * from the bottom, make the widget current.  Return widget number.
 339  */
 340 int
 341 add_widget_autopos (Dlg_head * h, void *w, widget_pos_flags_t pos_flags)
 342 {
 343     Widget *widget = (Widget *) w;
 344
 345     /* Don't accept 0 widgets */
 346     if (w == NULL)
 347         abort ();
 348
 349     widget->x += h->x;
 350     widget->y += h->y;
 351     widget->owner = h;
 352     widget->pos_flags = pos_flags;
 353     widget->id = g_list_length (h->widgets);
 354
 355     if ((h->flags & DLG_REVERSE) != 0)
 356         h->widgets = g_list_prepend (h->widgets, widget);
 357     else
 358         h->widgets = g_list_append (h->widgets, widget);
 359
 360     h->current = h->widgets;
 361
 362     return widget->id;
 363 }
 364
 365 /* wrapper to simply add lefttop positioned controls */
 366 int
 367 add_widget (Dlg_head * h, void *w)
 368 {
 369     return add_widget_autopos (h, w, WPOS_KEEP_LEFT | WPOS_KEEP_TOP);
 370 }
 371
 372 void
 373 do_refresh (void)
 374 {
 375     GList *d = top_dlg;
 376
 377     if (fast_refresh)
 378     {
 379         if ((d != NULL) && (d->data != NULL))
 380             dlg_redraw ((Dlg_head *) d->data);
 381     }
 382     else
 383     {
 384         /* Search first fullscreen dialog */
 385         for (; d != NULL; d = g_list_next (d))
 386             if ((d->data != NULL) && ((Dlg_head *) d->data)->fullscreen)
 387                 break;
 388         /* back to top dialog */
 389         for (; d != NULL; d = g_list_previous (d))
 390             if (d->data != NULL)
 391                 dlg_redraw ((Dlg_head *) d->data);
 392     }
 393 }
 394
 395 /* broadcast a message to all the widgets in a dialog that have
 396  * the options set to flags. If flags is zero, the message is sent
 397  * to all widgets.
 398  */
 399 static void
 400 dlg_broadcast_msg_to (Dlg_head * h, widget_msg_t message, gboolean reverse, int flags)
 401 {
 402     GList *p, *first;
 403
 404     if (h->widgets == NULL)
 405         return;
 406
 407     if (h->current == NULL)
 408         h->current = h->widgets;
 409
 410     if (reverse)
 411     {
 412         p = g_list_previous (h->current);
 413
 414         if (p == NULL)
 415             p = g_list_last (h->widgets);
 416     }
 417     else
 418     {
 419         p = g_list_next (h->current);
 420
 421         if (p == NULL)
 422             p = h->widgets;
 423     }
 424
 425     first = p;
 426
 427     do
 428     {
 429         Widget *w = (Widget *) p->data;
 430
 431         if (reverse)
 432         {
 433             p = g_list_previous (p);
 434
 435             if (p == NULL)
 436                 p = g_list_last (h->widgets);
 437         }
 438         else
 439         {
 440             p = g_list_next (p);
 441
 442             if (p == NULL)
 443                 p = h->widgets;
 444         }
 445
 446         if ((flags == 0) || ((flags & w->options) != 0))
 447             send_message (w, message, 0);
 448     }
 449     while (first != p);
 450 }
 451
 452 /* broadcast a message to all the widgets in a dialog */
 453 void
 454 dlg_broadcast_msg (Dlg_head * h, widget_msg_t message, gboolean reverse)
 455 {
 456     dlg_broadcast_msg_to (h, message, reverse, 0);
 457 }
 458
 459 int
 460 dlg_focus (Dlg_head * h)
 461 {
 462     /* cannot focus disabled widget ... */
 463
 464     if ((h->current != NULL) && (h->state == DLG_ACTIVE))
 465     {
 466         Widget *current = (Widget *) h->current->data;
 467
 468         if (((current->options & W_DISABLED) == 0)
 469             && (send_message (current, WIDGET_FOCUS, 0) == MSG_HANDLED))
 470         {
 471             h->callback (h, current, DLG_FOCUS, 0, NULL);
 472             return 1;
 473         }
 474     }
 475
 476     return 0;
 477 }
 478
 479 static int
 480 dlg_unfocus (Dlg_head * h)
 481 {
 482     /* ... but can unfocus disabled widget */
 483
 484     if ((h->current != NULL) && (h->state == DLG_ACTIVE))
 485     {
 486         Widget *current = (Widget *) h->current->data;
 487
 488         if (send_message (current, WIDGET_UNFOCUS, 0) == MSG_HANDLED)
 489         {
 490             h->callback (h, current, DLG_UNFOCUS, 0, NULL);
 491             return 1;
 492         }
 493     }
 494
 495     return 0;
 496 }
 497
 498 /* Return true if the windows overlap */
 499 int
 500 dlg_overlap (Widget * a, Widget * b)
 501 {
 502     return !((b->x >= a->x + a->cols)
 503              || (a->x >= b->x + b->cols) || (b->y >= a->y + a->lines) || (a->y >= b->y + b->lines));
 504 }
 505
 506 static int
 507 dlg_find_widget_callback (const void *a, const void *b)
 508 {
 509     const Widget *w = (const Widget *) a;
 510     callback_fn f = (callback_fn) b;
 511
 512     return (w->callback == f) ? 0 : 1;
 513 }
 514
 515 /* Find the widget with the given callback in the dialog h */
 516 Widget *
 517 find_widget_type (const Dlg_head * h, callback_fn callback)
 518 {
 519     GList *w;
 520
 521     w = g_list_find_custom (h->widgets, callback, dlg_find_widget_callback);
 522
 523     return (w == NULL) ? NULL : (Widget *) w->data;
 524 }
 525
 526 /* Find the widget with the given id */
 527 Widget *
 528 dlg_find_by_id (const Dlg_head * h, unsigned int id)
 529 {
 530     if (h->widgets != NULL)
 531     {
 532         GList *w;
 533
 534         for (w = h->widgets; w != NULL; w = g_list_next (w))
 535             if (((Widget *) w->data)->id == id)
 536                 return (Widget *) w->data;
 537     }
 538
 539     return NULL;
 540 }
 541
 542 /* Find the widget with the given id in the dialog h and select it */
 543 void
 544 dlg_select_by_id (const Dlg_head * h, unsigned int id)
 545 {
 546     Widget *w;
 547
 548     w = dlg_find_by_id (h, id);
 549     if (w != NULL)
 550         dlg_select_widget (w);
 551 }
 552
 553 /* What to do if the requested widget doesn't take focus */
 554 typedef enum
 555 {
 556     SELECT_NEXT,                /* go the the next widget */
 557     SELECT_PREV,                /* go the the previous widget */
 558     SELECT_EXACT                /* use current widget */
 559 } select_dir_t;
 560
 561 /*
 562  * Try to select another widget.  If forward is set, follow tab order.
 563  * Otherwise go to the previous widget.
 564  */
 565 static void
 566 do_select_widget (Dlg_head * h, GList * w, select_dir_t dir)
 567 {
 568     Widget *w0 = (Widget *) h->current->data;
 569
 570     if (!dlg_unfocus (h))
 571         return;
 572
 573     h->current = w;
 574
 575     do
 576     {
 577         if (dlg_focus (h))
 578             break;
 579
 580         switch (dir)
 581         {
 582         case SELECT_NEXT:
 583             h->current = g_list_next (h->current);
 584             if (h->current == NULL)
 585                 h->current = h->widgets;
 586             break;
 587         case SELECT_PREV:
 588             h->current = g_list_previous (h->current);
 589             if (h->current == NULL)
 590                 h->current = g_list_last (h->widgets);
 591             break;
 592         case SELECT_EXACT:
 593             h->current = g_list_find (h->widgets, w0);
 594             dlg_focus (h);
 595             return;
 596         }
 597     }
 598     while (h->current != w /* && (((Widget *) h->current->data)->options & W_DISABLED) == 0 */);
 599
 600     if (dlg_overlap (w0, (Widget *) h->current->data))
 601     {
 602         send_message ((Widget *) h->current->data, WIDGET_DRAW, 0);
 603         send_message ((Widget *) h->current->data, WIDGET_FOCUS, 0);
 604     }
 605 }
 606
 607 /*
 608  * Try to select widget in the dialog.
 609  */
 610 void
 611 dlg_select_widget (void *w)
 612 {
 613     const Widget *widget = (Widget *) w;
 614     Dlg_head *h = widget->owner;
 615
 616     do_select_widget (h, g_list_find (h->widgets, widget), SELECT_NEXT);
 617 }
 618
 619 /* Try to select previous widget in the tab order */
 620 void
 621 dlg_one_up (Dlg_head * h)
 622 {
 623     if (h->widgets != NULL)
 624     {
 625         GList *prev;
 626
 627         prev = g_list_previous (h->current);
 628         if (prev == NULL)
 629             prev = g_list_last (h->widgets);
 630
 631         do_select_widget (h, prev, SELECT_PREV);
 632     }
 633 }
 634
 635 /* Try to select next widget in the tab order */
 636 void
 637 dlg_one_down (Dlg_head * h)
 638 {
 639     if (h->widgets != NULL)
 640     {
 641         GList *next;
 642
 643         next = g_list_next (h->current);
 644         if (next == NULL)
 645             next = h->widgets;
 646         do_select_widget (h, next, SELECT_NEXT);
 647     }
 648 }
 649
 650 void
 651 update_cursor (Dlg_head * h)
 652 {
 653     GList *p = h->current;
 654
 655     if ((p != NULL) && (h->state == DLG_ACTIVE))
 656     {
 657         Widget *w;
 658
 659         w = (Widget *) p->data;
 660
 661         if (((w->options & W_DISABLED) == 0) && ((w->options & W_WANT_CURSOR) != 0))
 662             send_message (w, WIDGET_CURSOR, 0);
 663         else
 664             do
 665             {
 666                 p = g_list_next (p);
 667                 if (p == NULL)
 668                     p = h->widgets;
 669
 670                 if (p == h->current)
 671                     break;
 672
 673                 w = (Widget *) p->data;
 674
 675                 if (((w->options & W_DISABLED) == 0) && ((w->options & W_WANT_CURSOR) != 0))
 676                     if (send_message (w, WIDGET_CURSOR, 0) == MSG_HANDLED)
 677                         break;
 678             }
 679             while (TRUE);
 680     }
 681 }
 682
 683 /* Redraw the widgets in reverse order, leaving the current widget
 684  * as the last one
 685  */
 686 void
 687 dlg_redraw (Dlg_head * h)
 688 {
 689     if (h->state != DLG_ACTIVE)
 690         return;
 691
 692     if (h->winch_pending)
 693     {
 694         h->winch_pending = FALSE;
 695         h->callback (h, NULL, DLG_RESIZE, 0, NULL);
 696     }
 697
 698     h->callback (h, NULL, DLG_DRAW, 0, NULL);
 699     dlg_broadcast_msg (h, WIDGET_DRAW, TRUE);
 700     update_cursor (h);
 701 }
 702
 703 void
 704 dlg_stop (Dlg_head * h)
 705 {
 706     h->state = DLG_CLOSED;
 707 }
 708
 709 static void
 710 refresh_cmd (void)
 711 {
 712 #ifdef HAVE_SLANG
 713         tty_touch_screen ();
 714         mc_refresh ();
 715 #else
 716         /* Use this if the refreshes fail */
 717         clr_scr ();
 718         repaint_screen ();
 719 #endif /* HAVE_SLANG */
 720 }
 721
 722 static cb_ret_t
 723 dlg_execute_cmd (Dlg_head * h, unsigned long command)
 724 {
 725     cb_ret_t ret = MSG_HANDLED;
 726     switch (command)
 727     {
 728     case CK_DialogOK:
 729         h->ret_value = B_ENTER;
 730         dlg_stop (h);
 731         break;
 732     case CK_DialogCancel:
 733         h->ret_value = B_CANCEL;
 734         dlg_stop (h);
 735         break;
 736
 737     case CK_DialogPrevItem:
 738         dlg_one_up (h);
 739         break;
 740     case CK_DialogNextItem:
 741         dlg_one_down (h);
 742         break;
 743
 744     case CK_DialogHelp:
 745         interactive_display (NULL, h->help_ctx);
 746         do_refresh ();
 747         break;
 748
 749     case CK_DialogSuspend:
 750         suspend_cmd ();
 751         refresh_cmd ();
 752         break;
 753     case CK_DialogRefresh:
 754         refresh_cmd ();
 755         break;
 756
 757     case CK_DialogListCmd:
 758         if (!h->modal)
 759             dialog_switch_list ();
 760         else
 761             ret = MSG_NOT_HANDLED;
 762         break;
 763     case CK_DialogNextCmd:
 764         if (!h->modal)
 765             dialog_switch_next ();
 766         else
 767             ret = MSG_NOT_HANDLED;
 768         break;
 769     case CK_DialogPrevCmd:
 770         if (!h->modal)
 771             dialog_switch_prev ();
 772         else
 773             ret = MSG_NOT_HANDLED;
 774         break;
 775
 776     default:
 777         ret = MSG_NOT_HANDLED;
 778     }
 779
 780     return ret;
 781 }
 782
 783 static cb_ret_t
 784 dlg_handle_key (Dlg_head * h, int d_key)
 785 {
 786     unsigned long command;
 787     command = lookup_keymap_command (dialog_map, d_key);
 788     if ((command == CK_Ignore_Key) || (dlg_execute_cmd (h, command) == MSG_NOT_HANDLED))
 789         return MSG_NOT_HANDLED;
 790     else
 791         return MSG_HANDLED;
 792 }
 793
 794 static int
 795 dlg_mouse_event (Dlg_head * h, Gpm_Event * event)
 796 {
 797     GList *item;
 798     GList *starting_widget = h->current;
 799     Gpm_Event new_event;
 800     int x = event->x;
 801     int y = event->y;
 802
 803     /* close the dialog by mouse click out of dialog area */
 804     if (mouse_close_dialog && !h->fullscreen && ((event->buttons & GPM_B_LEFT) != 0) && ((event->type & GPM_DOWN) != 0) /* left click */
 805         && !((x > h->x) && (x <= h->x + h->cols) && (y > h->y) && (y <= h->y + h->lines)))
 806     {
 807         h->ret_value = B_CANCEL;
 808         dlg_stop (h);
 809         return MOU_NORMAL;
 810     }
 811
 812     item = starting_widget;
 813     do
 814     {
 815         Widget *widget;
 816
 817         widget = (Widget *) item->data;
 818         item = g_list_next (item);
 819         if (item == NULL)
 820             item = h->widgets;
 821
 822         if (((widget->options & W_DISABLED) == 0)
 823             && (x > widget->x) && (x <= widget->x + widget->cols)
 824             && (y > widget->y) && (y <= widget->y + widget->lines))
 825         {
 826             new_event = *event;
 827             new_event.x -= widget->x;
 828             new_event.y -= widget->y;
 829
 830             if (widget->mouse != NULL)
 831                 return widget->mouse (&new_event, widget);
 832         }
 833     }
 834     while (item != starting_widget);
 835
 836     return MOU_NORMAL;
 837 }
 838
 839 static cb_ret_t
 840 dlg_try_hotkey (Dlg_head * h, int d_key)
 841 {
 842     GList *hot_cur;
 843     Widget *current;
 844     cb_ret_t handled;
 845     int c;
 846
 847     if (h->widgets == NULL)
 848         return MSG_NOT_HANDLED;
 849
 850     if (h->current == NULL)
 851         h->current = h->widgets;
 852
 853     /*
 854      * Explanation: we don't send letter hotkeys to other widgets if
 855      * the currently selected widget is an input line
 856      */
 857
 858     current = (Widget *) h->current->data;
 859
 860     if ((current->options & W_DISABLED) != 0)
 861         return MSG_NOT_HANDLED;
 862
 863     if (current->options & W_IS_INPUT)
 864     {
 865         /* skip ascii control characters, anything else can valid character in
 866          * some encoding */
 867         if (d_key >= 32 && d_key < 256)
 868             return MSG_NOT_HANDLED;
 869     }
 870
 871     /* If it's an alt key, send the message */
 872     c = d_key & ~ALT (0);
 873     if (d_key & ALT (0) && g_ascii_isalpha (c))
 874         d_key = g_ascii_tolower (c);
 875
 876     handled = MSG_NOT_HANDLED;
 877     if ((current->options & W_WANT_HOTKEY) != 0)
 878         handled = send_message (current, WIDGET_HOTKEY, d_key);
 879
 880     /* If not used, send hotkey to other widgets */
 881     if (handled == MSG_HANDLED)
 882         return MSG_HANDLED;
 883
 884     hot_cur = g_list_next (h->current);
 885     if (hot_cur == NULL)
 886         hot_cur = h->widgets;
 887
 888     /* send it to all widgets */
 889     while (h->current != hot_cur && handled == MSG_NOT_HANDLED)
 890     {
 891         current = (Widget *) hot_cur->data;
 892
 893         if ((current->options & W_WANT_HOTKEY) != 0)
 894             handled = send_message (current, WIDGET_HOTKEY, d_key);
 895
 896         if (handled == MSG_NOT_HANDLED)
 897         {
 898             hot_cur = g_list_next (hot_cur);
 899             if (hot_cur == NULL)
 900                 hot_cur = h->widgets;
 901         }
 902     }
 903
 904     if (handled == MSG_HANDLED)
 905         do_select_widget (h, hot_cur, SELECT_EXACT);
 906
 907     return handled;
 908 }
 909
 910 static void
 911 dlg_key_event (Dlg_head * h, int d_key)
 912 {
 913     cb_ret_t handled;
 914
 915     if (h->widgets == NULL)
 916         return;
 917
 918     if (h->current == NULL)
 919         h->current = h->widgets;
 920
 921     /* TAB used to cycle */
 922     if ((h->flags & DLG_WANT_TAB) == 0)
 923     {
 924         if (d_key == '\t')
 925         {
 926             dlg_one_down (h);
 927             return;
 928         }
 929         else if (d_key == KEY_BTAB)
 930         {
 931             dlg_one_up (h);
 932             return;
 933         }
 934     }
 935
 936     /* first can dlg_callback handle the key */
 937     handled = h->callback (h, NULL, DLG_KEY, d_key, NULL);
 938
 939     /* next try the hotkey */
 940     if (handled == MSG_NOT_HANDLED)
 941         handled = dlg_try_hotkey (h, d_key);
 942
 943     if (handled == MSG_HANDLED)
 944         h->callback (h, NULL, DLG_HOTKEY_HANDLED, 0, NULL);
 945     else
 946         /* not used - then try widget_callback */
 947         handled = send_message ((Widget *) h->current->data, WIDGET_KEY, d_key);
 948
 949     /* not used- try to use the unhandled case */
 950     if (handled == MSG_NOT_HANDLED)
 951         handled = h->callback (h, NULL, DLG_UNHANDLED_KEY, d_key, NULL);
 952
 953     if (handled == MSG_NOT_HANDLED)
 954         handled = dlg_handle_key (h, d_key);
 955
 956     h->callback (h, NULL, DLG_POST_KEY, d_key, NULL);
 957 }
 958
 959 /* Init the process */
 960 void
 961 init_dlg (Dlg_head * h)
 962 {
 963     if ((top_dlg != NULL) && ((Dlg_head *) top_dlg->data)->modal)
 964         h->modal = TRUE;
 965
 966
 967     /* add dialog to the stack */
 968     top_dlg = g_list_prepend (top_dlg, h);
 969
 970     /* Initialize dialog manager and widgets */
 971     if (h->state == DLG_ACTIVE)
 972     {
 973         if (!h->modal)
 974             dialog_switch_add (h);
 975
 976         h->callback (h, NULL, DLG_INIT, 0, NULL);
 977         dlg_broadcast_msg (h, WIDGET_INIT, FALSE);
 978     }
 979
 980     h->state = DLG_ACTIVE;
 981
 982     dlg_redraw (h);
 983
 984     /* Select the first widget that takes focus */
 985     while (h->current != NULL && !dlg_focus (h))
 986     {
 987         h->current = g_list_next (h->current);
 988         if (h->current == NULL)
 989             h->current = h->widgets;
 990     }
 991
 992     h->ret_value = 0;
 993 }
 994
 995 void
 996 dlg_process_event (Dlg_head * h, int key, Gpm_Event * event)
 997 {
 998     if (key == EV_NONE)
 999     {
1000         if (tty_got_interrupt ())
1001             dlg_execute_cmd (h, CK_DialogCancel);
1002
1003         return;
1004     }
1005
1006     if (key == EV_MOUSE)
1007         h->mouse_status = dlg_mouse_event (h, event);
1008     else
1009         dlg_key_event (h, key);
1010 }
1011
1012 static void
1013 frontend_run_dlg (Dlg_head * h)
1014 {
1015     int d_key;
1016     Gpm_Event event;
1017
1018     event.x = -1;
1019
1020     /* close opened editors, viewers, etc */
1021     if (!h->modal && midnight_shutdown)
1022     {
1023         h->callback (h, NULL, DLG_VALIDATE, 0, NULL);
1024         return;
1025     }
1026
1027     while (h->state == DLG_ACTIVE)
1028     {
1029         if (winch_flag)
1030             change_screen_size ();
1031
1032         if (is_idle ())
1033         {
1034             if (idle_hook)
1035                 execute_hooks (idle_hook);
1036
1037             while ((h->flags & DLG_WANT_IDLE) && is_idle ())
1038                 h->callback (h, NULL, DLG_IDLE, 0, NULL);
1039
1040             /* Allow terminating the dialog from the idle handler */
1041             if (h->state != DLG_ACTIVE)
1042                 break;
1043         }
1044
1045         update_cursor (h);
1046
1047         /* Clear interrupt flag */
1048         tty_got_interrupt ();
1049         d_key = tty_get_event (&event, h->mouse_status == MOU_REPEAT, TRUE);
1050
1051         dlg_process_event (h, d_key, &event);
1052
1053         if (h->state == DLG_CLOSED)
1054             h->callback (h, NULL, DLG_VALIDATE, 0, NULL);
1055     }
1056 }
1057
1058 /* Shutdown the run_dlg */
1059 void
1060 dlg_run_done (Dlg_head * h)
1061 {
1062     if (h->state == DLG_CLOSED)
1063     {
1064         h->callback (h, (Widget *) h->current->data, DLG_END, 0, NULL);
1065         if (!h->modal)
1066             dialog_switch_remove (h);
1067     }
1068
1069     top_dlg = g_list_remove (top_dlg, h);
1070 }
1071
1072 /* Standard run dialog routine
1073  * We have to keep this routine small so that we can duplicate it's
1074  * behavior on complex routines like the file routines, this way,
1075  * they can call the dlg_process_event without rewriting all the code
1076  */
1077 int
1078 run_dlg (Dlg_head * h)
1079 {
1080     init_dlg (h);
1081     frontend_run_dlg (h);
1082     dlg_run_done (h);
1083     return h->ret_value;
1084 }
1085
1086 void
1087 destroy_dlg (Dlg_head * h)
1088 {
1089     dlg_broadcast_msg (h, WIDGET_DESTROY, FALSE);
1090     g_list_foreach (h->widgets, (GFunc) g_free, NULL);
1091     g_list_free (h->widgets);
1092     g_free (h->color);
1093     g_free (h->title);
1094     g_free (h);
1095
1096     do_refresh ();
1097 }
1098
1099 char *
1100 dlg_get_title (const Dlg_head *h, size_t len)
1101 {
1102     char *t;
1103
1104     if (h == NULL)
1105         abort ();
1106
1107     if (h->get_title != NULL)
1108         t = h->get_title (h, len);
1109     else
1110         t = g_strdup ("");
1111
1112     return t;
1113 }
1114
1115 /* Replace widget old_w for widget new_w in the dialog */
1116 void
1117 dlg_replace_widget (Widget * old_w, Widget * new_w)
1118 {
1119     Dlg_head *h = old_w->owner;
1120     gboolean should_focus = FALSE;
1121
1122     if (h->widgets == NULL)
1123         return;
1124
1125     if (h->current == NULL)
1126         h->current = h->widgets;
1127
1128     if (old_w == h->current->data)
1129         should_focus = TRUE;
1130
1131     new_w->owner = h;
1132     new_w->id = old_w->id;
1133
1134     if (should_focus)
1135         h->current->data = new_w;
1136     else
1137         g_list_find (h->widgets, old_w)->data = new_w;
1138
1139     send_message (old_w, WIDGET_DESTROY, 0);
1140     send_message (new_w, WIDGET_INIT, 0);
1141
1142     if (should_focus)
1143         dlg_select_widget (new_w);
1144
1145     send_message (new_w, WIDGET_DRAW, 0);
1146 }