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 ? 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         t = g_strstrip (g_strdup (title));
 264         new_d->title = g_strconcat (" ", t, " ", (char *) NULL);
 265         g_free (t);
 266     }
 267
 268     return (new_d);
 269 }
 270
 271 void
 272 dlg_set_default_colors (void)
 273 {
 274     dialog_colors [0] = COLOR_NORMAL;
 275     dialog_colors [1] = COLOR_FOCUS;
 276     dialog_colors [2] = COLOR_HOT_NORMAL;
 277     dialog_colors [3] = COLOR_HOT_FOCUS;
 278
 279     alarm_colors [0] = ERROR_COLOR;
 280     alarm_colors [1] = REVERSE_COLOR;
 281     alarm_colors [2] = ERROR_HOT_NORMAL;
 282     alarm_colors [3] = ERROR_HOT_FOCUS;
 283 }
 284
 285 void
 286 set_idle_proc (Dlg_head *d, int enable)
 287 {
 288     if (enable)
 289         d->flags |= DLG_WANT_IDLE;
 290     else
 291         d->flags &= ~DLG_WANT_IDLE;
 292 }
 293
 294 /*
 295  * Insert widget to dialog before current widget.  For dialogs populated
 296  * from the bottom, make the widget current.  Return widget number.
 297  */
 298 int
 299 add_widget_autopos (Dlg_head *h, void *w, widget_pos_flags_t pos_flags)
 300 {
 301     Widget *widget = (Widget *) w;
 302
 303     /* Don't accept 0 widgets, and running dialogs */
 304     if (!widget || h->running)
 305         abort ();
 306
 307     widget->x += h->x;
 308     widget->y += h->y;
 309     widget->parent = h;
 310     widget->dlg_id = h->count++;
 311     widget->pos_flags = pos_flags;
 312
 313     if (h->current) {
 314         widget->next = h->current;
 315         widget->prev = h->current->prev;
 316         h->current->prev->next = widget;
 317         h->current->prev = widget;
 318     } else {
 319         widget->prev = widget;
 320         widget->next = widget;
 321     }
 322
 323     if ((h->flags & DLG_REVERSE) || !h->current)
 324         h->current = widget;
 325
 326     return widget->dlg_id;
 327 }
 328
 329 /* wrapper to simply add lefttop positioned controls */
 330 int
 331 add_widget (Dlg_head *h, void *w)
 332 {
 333     return add_widget_autopos (h, w, WPOS_KEEP_LEFT | WPOS_KEEP_TOP);
 334 }
 335
 336 enum {
 337     REFRESH_COVERS_PART,        /* If the refresh fn convers only a part */
 338     REFRESH_COVERS_ALL          /* If the refresh fn convers all the screen */
 339 };
 340
 341 static void
 342 do_complete_refresh (Dlg_head *dlg)
 343 {
 344     if (!dlg->fullscreen && dlg->parent)
 345         do_complete_refresh (dlg->parent);
 346
 347     dlg_redraw (dlg);
 348 }
 349
 350 void
 351 do_refresh (void)
 352 {
 353     if (!current_dlg)
 354         return;
 355
 356     if (fast_refresh)
 357         dlg_redraw (current_dlg);
 358     else {
 359         do_complete_refresh (current_dlg);
 360     }
 361 }
 362
 363 /* broadcast a message to all the widgets in a dialog that have
 364  * the options set to flags. If flags is zero, the message is sent
 365  * to all widgets.
 366  */
 367 static void
 368 dlg_broadcast_msg_to (Dlg_head *h, widget_msg_t message, int reverse,
 369                       int flags)
 370 {
 371     Widget *p, *first, *wi;
 372
 373     if (!h->current)
 374         return;
 375
 376     if (reverse)
 377         first = p = h->current->prev;
 378     else
 379         first = p = h->current->next;
 380
 381     do {
 382         wi = p;
 383         if (reverse)
 384             p = p->prev;
 385         else
 386             p = p->next;
 387         if (flags == 0 || (flags & wi->options))
 388             send_message (wi, message, 0);
 389     } while (first != p);
 390 }
 391
 392 /* broadcast a message to all the widgets in a dialog */
 393 void
 394 dlg_broadcast_msg (Dlg_head *h, widget_msg_t message, int reverse)
 395 {
 396     dlg_broadcast_msg_to (h, message, reverse, 0);
 397 }
 398
 399 int dlg_focus (Dlg_head *h)
 400 {
 401     if (!h->current)
 402         return 0;
 403
 404     if (send_message (h->current, WIDGET_FOCUS, 0)){
 405         (*h->callback) (h, DLG_FOCUS, 0);
 406         return 1;
 407     }
 408     return 0;
 409 }
 410
 411 static int
 412 dlg_unfocus (Dlg_head *h)
 413 {
 414     if (!h->current)
 415         return 0;
 416
 417     if (send_message (h->current, WIDGET_UNFOCUS, 0)){
 418         (*h->callback) (h, DLG_UNFOCUS, 0);
 419         return 1;
 420     }
 421     return 0;
 422 }
 423
 424
 425 /* Return true if the windows overlap */
 426 int dlg_overlap (Widget *a, Widget *b)
 427 {
 428     if ((b->x >= a->x + a->cols)
 429         || (a->x >= b->x + b->cols)
 430         || (b->y >= a->y + a->lines)
 431         || (a->y >= b->y + b->lines))
 432         return 0;
 433     return 1;
 434 }
 435
 436
 437 /* Find the widget with the given callback in the dialog h */
 438 Widget *
 439 find_widget_type (Dlg_head *h, callback_fn callback)
 440 {
 441     Widget *w;
 442     Widget *item;
 443     int i;
 444
 445     if (!h)
 446         return 0;
 447     if (!h->current)
 448         return 0;
 449
 450     w = 0;
 451     for (i = 0, item = h->current; i < h->count; i++, item = item->next) {
 452         if (item->callback == callback) {
 453             w = item;
 454             break;
 455         }
 456     }
 457     return w;
 458 }
 459
 460 /* Find the widget with the given dialog id in the dialog h and select it */
 461 void
 462 dlg_select_by_id (Dlg_head *h, int id)
 463 {
 464     Widget *w, *w_found;
 465
 466     if (!h->current)
 467         return;
 468
 469     w = h->current;
 470     w_found = NULL;
 471
 472     do {
 473         if (w->dlg_id == id) {
 474             w_found = w;
 475             break;
 476         }
 477         w = w->next;
 478     } while (w != h->current);
 479
 480     if (w_found)
 481         dlg_select_widget(w_found);
 482 }
 483
 484
 485 /* What to do if the requested widget doesn't take focus */
 486 typedef enum {
 487     SELECT_NEXT,                /* go the the next widget */
 488     SELECT_PREV,                /* go the the previous widget */
 489     SELECT_EXACT                /* use current widget */
 490 } select_dir_t;
 491
 492 /*
 493  * Try to select another widget.  If forward is set, follow tab order.
 494  * Otherwise go to the previous widget.
 495  */
 496 static void
 497 do_select_widget (Dlg_head *h, Widget *w, select_dir_t dir)
 498 {
 499     Widget *w0 = h->current;
 500
 501     if (!dlg_unfocus (h))
 502         return;
 503
 504     h->current = w;
 505     do {
 506         if (dlg_focus (h))
 507             break;
 508
 509         switch (dir) {
 510         case SELECT_NEXT:
 511             h->current = h->current->next;
 512             break;
 513         case SELECT_PREV:
 514             h->current = h->current->prev;
 515             break;
 516         case SELECT_EXACT:
 517             h->current = w0;
 518             dlg_focus (h);
 519             return;
 520         }
 521     } while (h->current != w);
 522
 523     if (dlg_overlap (w0, h->current)) {
 524         send_message (h->current, WIDGET_DRAW, 0);
 525         send_message (h->current, WIDGET_FOCUS, 0);
 526     }
 527 }
 528
 529
 530 /*
 531  * Try to select widget in the dialog.
 532  */
 533 void
 534 dlg_select_widget (void *w)
 535 {
 536     do_select_widget (((Widget *) w)->parent, w, SELECT_NEXT);
 537 }
 538
 539
 540 /* Try to select previous widget in the tab order */
 541 void
 542 dlg_one_up (Dlg_head *h)
 543 {
 544     if (h->current)
 545         do_select_widget (h, h->current->prev, SELECT_PREV);
 546 }
 547
 548
 549 /* Try to select next widget in the tab order */
 550 void
 551 dlg_one_down (Dlg_head *h)
 552 {
 553     if (h->current)
 554         do_select_widget (h, h->current->next, SELECT_NEXT);
 555 }
 556
 557
 558 void update_cursor (Dlg_head *h)
 559 {
 560     Widget *p = h->current;
 561
 562     if (p != NULL) {
 563         if (p->options & W_WANT_CURSOR)
 564             send_message (p, WIDGET_CURSOR, 0);
 565         else
 566             while ((p = p->next) != h->current)
 567                 if (p->options & W_WANT_CURSOR)
 568                     if (send_message (p, WIDGET_CURSOR, 0) == MSG_HANDLED)
 569                         break;
 570     }
 571 }
 572
 573 /* Redraw the widgets in reverse order, leaving the current widget
 574  * as the last one
 575  */
 576 void dlg_redraw (Dlg_head *h)
 577 {
 578     (h->callback)(h, DLG_DRAW, 0);
 579
 580     dlg_broadcast_msg (h, WIDGET_DRAW, 1);
 581
 582     update_cursor (h);
 583 }
 584
 585 void dlg_stop (Dlg_head *h)
 586 {
 587     h->running = 0;
 588 }
 589
 590 static void
 591 dialog_handle_key (Dlg_head *h, int d_key)
 592 {
 593     if (is_abort_char (d_key)) {
 594         h->ret_value = B_CANCEL;
 595         dlg_stop (h);
 596         return;
 597     }
 598
 599     switch (d_key) {
 600     case '\n':
 601     case KEY_ENTER:
 602         h->ret_value = B_ENTER;
 603         dlg_stop (h);
 604         break;
 605
 606     case KEY_LEFT:
 607     case KEY_UP:
 608         dlg_one_up (h);
 609         break;
 610
 611     case KEY_RIGHT:
 612     case KEY_DOWN:
 613         dlg_one_down (h);
 614         break;
 615
 616     case KEY_F(1):
 617         interactive_display (NULL, h->help_ctx);
 618         do_refresh ();
 619         break;
 620
 621     case XCTRL('z'):
 622         suspend_cmd ();
 623         /* Fall through */
 624
 625     case XCTRL('l'):
 626 #ifdef HAVE_SLANG
 627         tty_touch_screen ();
 628         mc_refresh ();
 629 #else
 630         /* Use this if the refreshes fail */
 631         clr_scr ();
 632         repaint_screen ();
 633 #endif /* HAVE_SLANG */
 634         break;
 635
 636     default:
 637         break;
 638     }
 639 }
 640
 641 static cb_ret_t
 642 dlg_try_hotkey (Dlg_head *h, int d_key)
 643 {
 644     Widget *hot_cur;
 645     cb_ret_t handled;
 646     int c;
 647
 648     if (h->current == NULL)
 649         return MSG_NOT_HANDLED;
 650
 651     /*
 652      * Explanation: we don't send letter hotkeys to other widgets if
 653      * the currently selected widget is an input line
 654      */
 655
 656     if (h->current->options & W_IS_INPUT) {
 657         /* skip ascii control characters, anything else can valid character in
 658          * some encoding */
 659         if (d_key >= 32 && d_key < 256)
 660             return MSG_NOT_HANDLED;
 661     }
 662
 663     /* If it's an alt key, send the message */
 664     c = d_key & ~ALT (0);
 665     if (d_key & ALT (0) && g_ascii_isalpha (c))
 666         d_key = g_ascii_tolower (c);
 667
 668     handled = MSG_NOT_HANDLED;
 669     if (h->current->options & W_WANT_HOTKEY)
 670         handled = send_message (h->current, WIDGET_HOTKEY, d_key);
 671
 672     /* If not used, send hotkey to other widgets */
 673     if (handled == MSG_HANDLED)
 674         return MSG_HANDLED;
 675
 676     hot_cur = h->current->next;
 677
 678     /* send it to all widgets */
 679     while (h->current != hot_cur && handled == MSG_NOT_HANDLED) {
 680         if (hot_cur->options & W_WANT_HOTKEY)
 681             handled = send_message (hot_cur, WIDGET_HOTKEY, d_key);
 682
 683         if (handled == MSG_NOT_HANDLED)
 684             hot_cur = hot_cur->next;
 685     }
 686
 687     if (handled == MSG_HANDLED)
 688         do_select_widget (h, hot_cur, SELECT_EXACT);
 689
 690     return handled;
 691 }
 692
 693 static void
 694 dlg_key_event (Dlg_head *h, int d_key)
 695 {
 696     cb_ret_t handled;
 697
 698     if (h->current == NULL)
 699         return;
 700
 701     /* TAB used to cycle */
 702     if (!(h->flags & DLG_WANT_TAB)) {
 703         if (d_key == '\t') {
 704             dlg_one_down (h);
 705             return;
 706         } else if (d_key == KEY_BTAB) {
 707             dlg_one_up (h);
 708             return;
 709         }
 710     }
 711
 712     /* first can dlg_callback handle the key */
 713     handled = (*h->callback) (h, DLG_KEY, d_key);
 714
 715     /* next try the hotkey */
 716     if (handled == MSG_NOT_HANDLED)
 717         handled = dlg_try_hotkey (h, d_key);
 718
 719     if (handled == MSG_HANDLED)
 720         (*h->callback) (h, DLG_HOTKEY_HANDLED, 0);
 721     else
 722         /* not used - then try widget_callback */
 723         handled = send_message (h->current, WIDGET_KEY, d_key);
 724
 725     /* not used- try to use the unhandled case */
 726     if (handled == MSG_NOT_HANDLED)
 727         handled = (*h->callback) (h, DLG_UNHANDLED_KEY, d_key);
 728
 729     if (handled == MSG_NOT_HANDLED)
 730         dialog_handle_key (h, d_key);
 731
 732     (*h->callback) (h, DLG_POST_KEY, d_key);
 733 }
 734
 735 static int
 736 dlg_mouse_event (Dlg_head * h, Gpm_Event * event)
 737 {
 738     Widget *item;
 739     Widget *starting_widget = h->current;
 740     Gpm_Event new_event;
 741     int x = event->x;
 742     int y = event->y;
 743
 744     /* close the dialog by mouse click out of dialog area */
 745     if (mouse_close_dialog && !h->fullscreen
 746         && ((event->buttons & GPM_B_LEFT) != 0) && ((event->type & GPM_DOWN) != 0)  /* left click */
 747         && !((x > h->x) && (x <= h->x + h->cols) && (y > h->y) && (y <= h->y + h->lines))) {
 748         h->ret_value = B_CANCEL;
 749         dlg_stop (h);
 750         return MOU_NORMAL;
 751     }
 752
 753     item = starting_widget;
 754     do {
 755         Widget *widget;
 756
 757         widget = item;
 758         item = item->next;
 759
 760         if ((x > widget->x) && (x <= widget->x + widget->cols)
 761                 && (y > widget->y) && (y <= widget->y + widget->lines)) {
 762             new_event = *event;
 763             new_event.x -= widget->x;
 764             new_event.y -= widget->y;
 765
 766             if (widget->mouse != NULL)
 767                 return widget->mouse (&new_event, widget);
 768         }
 769     } while (item != starting_widget);
 770
 771     return MOU_NORMAL;
 772 }
 773
 774 /* Run dialog routines */
 775
 776 /* Init the process */
 777 void init_dlg (Dlg_head *h)
 778 {
 779     /* Initialize dialog manager and widgets */
 780     (*h->callback) (h, DLG_INIT, 0);
 781     dlg_broadcast_msg (h, WIDGET_INIT, 0);
 782
 783     if (h->x == 0 && h->y == 0 && h->cols == COLS && h->lines == LINES)
 784         h->fullscreen = 1;
 785
 786     h->parent = current_dlg;
 787     current_dlg = h;
 788
 789     /* Initialize the mouse status */
 790     h->mouse_status = MOU_NORMAL;
 791
 792     /* Select the first widget that takes focus */
 793     while (!dlg_focus (h) && h->current)
 794         h->current = h->current->next;
 795
 796     /* Redraw the screen */
 797     dlg_redraw (h);
 798
 799     h->ret_value = 0;
 800     h->running = 1;
 801 }
 802
 803 /* Shutdown the run_dlg */
 804 void dlg_run_done (Dlg_head *h)
 805 {
 806     if (h->current)
 807         (*h->callback) (h, DLG_END, 0);
 808
 809     current_dlg = h->parent;
 810 }
 811
 812 void dlg_process_event (Dlg_head *h, int key, Gpm_Event *event)
 813 {
 814     if (key == EV_NONE){
 815         if (tty_got_interrupt ())
 816             key = XCTRL('g');
 817         else
 818             return;
 819     }
 820
 821     if (key == EV_MOUSE)
 822         h->mouse_status = dlg_mouse_event (h, event);
 823     else
 824         dlg_key_event (h, key);
 825 }
 826
 827 static void
 828 frontend_run_dlg (Dlg_head *h)
 829 {
 830     int d_key;
 831     Gpm_Event event;
 832
 833     event.x = -1;
 834     while (h->running) {
 835         if (winch_flag)
 836             change_screen_size ();
 837
 838         if (is_idle ()) {
 839             if (idle_hook)
 840                 execute_hooks (idle_hook);
 841
 842             while ((h->flags & DLG_WANT_IDLE) && is_idle ())
 843                 (*h->callback) (h, DLG_IDLE, 0);
 844
 845             /* Allow terminating the dialog from the idle handler */
 846             if (!h->running)
 847                 break;
 848         }
 849
 850         update_cursor (h);
 851
 852         /* Clear interrupt flag */
 853         tty_got_interrupt ();
 854         d_key = tty_get_event (&event, h->mouse_status == MOU_REPEAT, TRUE);
 855
 856         dlg_process_event (h, d_key, &event);
 857
 858         if (!h->running)
 859             (*h->callback) (h, DLG_VALIDATE, 0);
 860     }
 861 }
 862
 863 /* Standard run dialog routine
 864  * We have to keep this routine small so that we can duplicate it's
 865  * behavior on complex routines like the file routines, this way,
 866  * they can call the dlg_process_event without rewriting all the code
 867  */
 868 int run_dlg (Dlg_head *h)
 869 {
 870     init_dlg (h);
 871     frontend_run_dlg (h);
 872     dlg_run_done (h);
 873     return h->ret_value;
 874 }
 875
 876 void
 877 destroy_dlg (Dlg_head *h)
 878 {
 879     int i;
 880     Widget *c;
 881
 882     dlg_broadcast_msg (h, WIDGET_DESTROY, 0);
 883     c = h->current;
 884     for (i = 0; i < h->count; i++) {
 885         c = c->next;
 886         g_free (h->current);
 887         h->current = c;
 888     }
 889     g_free (h->color);
 890     g_free (h->title);
 891     g_free (h);
 892
 893     do_refresh ();
 894 }
 895
 896 void widget_set_size (Widget *widget, int y, int x, int lines, int cols)
 897 {
 898     widget->x = x;
 899     widget->y = y;
 900     widget->cols = cols;
 901     widget->lines = lines;
 902     send_message (widget, WIDGET_RESIZED, 0 /* unused */);
 903 }
 904
 905 /* Replace widget old_w for widget new_w in the dialog */
 906 void
 907 dlg_replace_widget (Widget *old_w, Widget *new_w)
 908 {
 909     Dlg_head *h = old_w->parent;
 910     int should_focus = 0;
 911
 912     if (!h->current)
 913         return;
 914
 915     if (old_w == h->current)
 916         should_focus = 1;
 917
 918     new_w->parent = h;
 919     new_w->dlg_id = old_w->dlg_id;
 920
 921     if (old_w == old_w->next) {
 922         /* just one widget */
 923         new_w->prev = new_w;
 924         new_w->next = new_w;
 925     } else {
 926         new_w->prev = old_w->prev;
 927         new_w->next = old_w->next;
 928         old_w->prev->next = new_w;
 929         old_w->next->prev = new_w;
 930     }
 931
 932     if (should_focus)
 933         h->current = new_w;
 934
 935     send_message (old_w, WIDGET_DESTROY, 0);
 936     send_message (new_w, WIDGET_INIT, 0);
 937
 938     if (should_focus)
 939         dlg_select_widget (new_w);
 940
 941     send_message (new_w, WIDGET_DRAW, 0);
 942 }