mdw@git.distorted.org.uk Git - xtoys/blob - xgetline.c

   1 /* -*-c-*-
   2  *
   3  * $Id: xgetline.c,v 1.7 1998/12/11 09:53:02 mdw Exp $
   4  *
   5  * Fetch a line of text from the user
   6  *
   7  * (c) 1998 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the Edgeware X tools collection.
  13  *
  14  * X tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * X tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with X tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: xgetline.c,v $
  32  * Revision 1.7  1998/12/11 09:53:02  mdw
  33  * Updates for mLib/mgLib.  Support history files for recalling past
  34  * entries, using a drop-down list.
  35  *
  36  * Revision 1.6  1998/12/03 00:56:29  mdw
  37  * Set focus on the entry field, rather than leaving things to luck.
  38  *
  39  * Revision 1.5  1998/12/03 00:39:44  mdw
  40  * Force focus when starting up.
  41  *
  42  * Revision 1.4  1998/11/30 22:36:47  mdw
  43  * Tidy up tabbing in help texts very slightly.
  44  *
  45  * Revision 1.3  1998/11/21 22:30:20  mdw
  46  * Support GNU-style long options throughout, and introduce proper help
  47  * text to all programs.  Update manual pages to match.
  48  *
  49  * Revision 1.2  1998/11/18 21:25:30  mdw
  50  * Remove bogus `-h' option from the options list.
  51  *
  52  * Revision 1.1  1998/11/16 23:00:49  mdw
  53  * Initial versions.
  54  *
  55  */
  56
  57 /*----- Header files ------------------------------------------------------*/
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62
  63 #include <fcntl.h>
  64 #include <unistd.h>
  65
  66 #include <gtk/gtk.h>
  67 #include <gdk/gdkkeysyms.h>
  68
  69 #include <mLib/alloc.h>
  70 #include <mLib/dstr.h>
  71 #include <mLib/mdwopt.h>
  72 #include <mLib/report.h>
  73 #include <mLib/quis.h>
  74
  75 #include <mgLib/cancel.h>
  76 #include <mgLib/mdwfocus.h>
  77
  78 /*----- Main code ---------------------------------------------------------*/
  79
  80 /* --- @quit@ --- *
  81  *
  82  * Arguments:   @GtkWidget *w@ = widget raising the signal
  83  *              @gpointer *p@ = pointer to integer result code
  84  *
  85  * Returns:     ---
  86  *
  87  * Use:         Sets the result code to zero (failure) and ends the loop.
  88  */
  89
  90 static void quit(GtkWidget *w, gpointer *p)
  91 {
  92   int *ip = (int *)p;
  93   *ip = 0;
  94   gtk_main_quit();
  95 }
  96
  97 /* --- @done@ --- *
  98  *
  99  * Arguments:   @GtkWidget *w@ = widget raising the signal
 100  *              @gpointer *p@ = pointer to integer result code
 101  *
 102  * Returns:     ---
 103  *
 104  * Use:         Sets the result code nonzero (success) and ends the loop.
 105  */
 106
 107 static void done(GtkWidget *w, gpointer *p)
 108 {
 109   int *ip = (int *)p;
 110   *ip = 1;
 111   gtk_main_quit();
 112 }
 113
 114 /* --- @version@ --- *
 115  *
 116  * Arguments:   @FILE *fp@ = output stream to print the message on
 117  *
 118  * Returns:     ---
 119  *
 120  * Use:         Spits out a version message.
 121  */
 122
 123 static void version(FILE *fp)
 124 {
 125   fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
 126 }
 127
 128 /* --- @usage@ --- *
 129  *
 130  * Arguments:   @FILE *fp@ = output stream to print the message on
 131  *
 132  * Returns:     ---
 133  *
 134  * Use:         Spits out a usage message.
 135  */
 136
 137 static void usage(FILE *fp)
 138 {
 139   fprintf(fp,
 140           "Usage: %s [-in] [-t title] [-p prompt] [-d default]\n"
 141           "\t[-l|-H file] [-m max]\n",
 142           QUIS);
 143 }
 144
 145 /* --- @main@ --- *
 146  *
 147  * Arguments:   @int argc@ = number of command line arguments
 148  *              @char *argv[]@ = addresses of arguments
 149  *
 150  * Returns:     Zero if OK, and we read a string; nonzero if the user
 151  *              cancelled.
 152  *
 153  * Use:         Reads a string from the user, and returns it on standard
 154  *              output.
 155  */
 156
 157 int main(int argc, char *argv[])
 158 {
 159   /* --- Configuration variables --- */
 160
 161   char *prompt = 0;
 162   char *dfl = "";
 163   char *title = "Input request";
 164   int left;
 165   unsigned f = 0;
 166   int ok = 0;
 167
 168   const char *list = 0;
 169   int histmax = 20;
 170   GList *hist;
 171
 172   enum {
 173     f_invis = 1,
 174     f_duff = 2,
 175     f_history = 4,
 176     f_nochoice = 8
 177   };
 178
 179   /* --- User interface bits --- */
 180
 181   GtkWidget *win;
 182   GtkWidget *box;
 183   GtkWidget *entry;
 184   GtkWidget *btn;
 185
 186   /* --- Crank up the toolkit --- *
 187    *
 188    * Have to do this here: GTK snarfs some command line options which my
 189    * parser would barf about.
 190    */
 191
 192   ego(argv[0]);
 193   gtk_init(&argc, &argv);
 194
 195   /* --- Parse options from command line --- */
 196
 197   for (;;) {
 198
 199     /* --- Long options structure --- */
 200
 201     static struct option opt[] = {
 202       { "help",         0,                      0,      'h' },
 203       { "usage",        0,                      0,      'u' },
 204       { "version",      0,                      0,      'v' },
 205       { "title",        required_argument,      0,      't' },
 206       { "prompt",       required_argument,      0,      'p' },
 207       { "default",      required_argument,      0,      'd' },
 208       { "password",     0,                      0,      'i' },
 209       { "invisible",    0,                      0,      'i' },
 210       { "history",      required_argument,      0,      'H' },
 211       { "list",         required_argument,      0,      'l' },
 212       { "histmax",      required_argument,      0,      'm' },
 213       { "no-choice",    0,                      0,      'n' },
 214       { 0,              0,                      0,      0 }
 215     };
 216     int i;
 217
 218     /* --- Fetch an option --- */
 219
 220     i = getopt_long(argc, argv, "huv t:p:d:i H:l:m:n", opt, 0);
 221     if (i < 0)
 222       break;
 223
 224     /* --- Work out what to do with it --- */
 225
 226     switch (i) {
 227       case 'h':
 228         version(stdout);
 229         fputs("\n", stdout);
 230         usage(stdout);
 231         fputs(
 232 "\n"
 233 "Pops up a small window requesting input from a user, and echoes the\n"
 234 "response to stdout, where it can be collected by a shell script.\n"
 235 "\n"
 236 "Options available are:\n"
 237 "\n"
 238 "-h, --help             Display this help text\n"
 239 "-u, --usage            Display a short usage summary\n"
 240 "-v, --version          Display the program's version number\n"
 241 "\n"
 242 "-i, --invisible\t      Don't show the user's string as it's typed\n"
 243 "-t, --title=TITLE      Set the window's title string\n"
 244 "-p, --prompt=PROMPT    Set the window's prompt string\n"
 245 "-d, --default=DEFAULT  Set the default string already in the window\n"
 246 "\n"
 247 "-l, --list=FILE        Read FILE into a drop-down list\n"
 248 "-n, --no-choice        No free text input: must choose item from list\n"
 249 "-H, --history=FILE     As for `--list', but update with new string\n"
 250 "-m, --histmax=MAX      Maximum number of items written back to file\n",
 251           stdout);
 252         exit(0);
 253         break;
 254       case 'u':
 255         usage(stdout);
 256         exit(0);
 257         break;
 258       case 'v':
 259         version(stdout);
 260         exit(0);
 261         break;
 262
 263       case 't':
 264         title = optarg;
 265         break;
 266       case 'p':
 267         prompt = optarg;
 268         break;
 269       case 'd':
 270         dfl = optarg;
 271         break;
 272       case 'i':
 273         f |= f_invis;
 274         break;
 275
 276       case 'l':
 277         list = optarg;
 278         break;
 279       case 'n':
 280         f |= f_nochoice;
 281         break;
 282       case 'H':
 283         f |= f_history;
 284         list = optarg;
 285         break;
 286       case 'm':
 287         histmax = atoi(optarg);
 288         break;
 289
 290       default:
 291         f |= f_duff;
 292         break;
 293     }
 294   }
 295
 296   if (f & f_duff) {
 297     usage(stderr);
 298     exit(EXIT_FAILURE);
 299   }
 300
 301   if ((f & f_invis) && list) {
 302     die(EXIT_FAILURE,
 303         "invisible entry is dumb if you provide a list of alternatives!");
 304   }
 305
 306   if ((f & f_nochoice) && !list)
 307     die(EXIT_FAILURE, "nothing to restrict choice to!");
 308
 309   /* --- Create the main window --- */
 310
 311   win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 312   gtk_window_set_title(GTK_WINDOW(win), title);
 313   gtk_window_position(GTK_WINDOW(win), GTK_WIN_POS_MOUSE);
 314   gtk_signal_connect(GTK_OBJECT(win), "destroy",
 315                      GTK_SIGNAL_FUNC(quit), &ok);
 316
 317   /* --- Create the box for laying out the widgets inside --- */
 318
 319   left = (prompt ? 1 : 0);
 320   box = gtk_table_new(left + 2, 1, 0);
 321
 322   /* --- Maybe create a prompt widget --- */
 323
 324   if (prompt) {
 325     GtkWidget *w = gtk_label_new(prompt);
 326     gtk_table_attach(GTK_TABLE(box), w,
 327                      0, 1, 0, 1, 0, GTK_EXPAND, 4, 2);
 328     gtk_widget_show(w);
 329   }
 330
 331   /* --- Create the entry widget --- */
 332
 333   if (list) {
 334     FILE *fp = fopen(list, "r");
 335     GtkWidget *combo;
 336
 337     /* --- Read the items in from the file --- *
 338      *
 339      * Inability to open the file is not a disaster.
 340      */
 341
 342     hist = 0;
 343     if (fp) {
 344       dstr d;
 345
 346       dstr_create(&d);
 347       while (dstr_putline(&d, fp) != EOF) {
 348         hist = g_list_append(hist, xstrdup(d.buf));
 349         dstr_destroy(&d);
 350       }
 351       fclose(fp);
 352     }
 353
 354     /* --- Now create a combo box --- */
 355
 356     combo = gtk_combo_new();
 357     entry = GTK_COMBO(combo)->entry;
 358     if (hist)
 359       gtk_combo_set_popdown_strings(GTK_COMBO(combo), hist);
 360
 361     /* --- Do other configuring --- */
 362
 363     if (f & f_nochoice) {
 364       gtk_combo_set_value_in_list(GTK_COMBO(combo), 1, 0);
 365       gtk_entry_set_editable(GTK_ENTRY(entry), 0);
 366     }
 367     gtk_combo_set_case_sensitive(GTK_COMBO(combo), 1);
 368     gtk_combo_set_use_arrows_always(GTK_COMBO(combo), 1);
 369     if (strcmp(dfl, "@") == 0)
 370       gtk_entry_set_text(GTK_ENTRY(entry), hist ? (char *)hist->data : "");
 371     else
 372       gtk_entry_set_text(GTK_ENTRY(entry), dfl);
 373
 374     /* --- Set the widget in the right place and show it --- */
 375
 376     gtk_table_attach(GTK_TABLE(box), combo,
 377                      left, left + 1, 0, 1,
 378                      GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
 379     gtk_widget_show(combo);
 380   } else {
 381     entry = gtk_entry_new();
 382     gtk_entry_set_text(GTK_ENTRY(entry), dfl);
 383     if (f & f_invis)
 384       gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE);
 385     gtk_table_attach(GTK_TABLE(box), entry,
 386                      left, left + 1, 0, 1,
 387                      GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
 388     gtk_widget_show(entry);
 389   }
 390
 391   /* --- Create the default action widget --- */
 392
 393   btn = gtk_button_new_with_label("OK");
 394   gtk_table_attach(GTK_TABLE(box), btn,
 395                    left + 1, left + 2, 0, 1, 0, GTK_EXPAND, 2, 2);
 396   GTK_WIDGET_SET_FLAGS(btn, GTK_CAN_DEFAULT);
 397   gtk_widget_show(btn);
 398
 399   /* --- Add the box into the main window --- */
 400
 401   gtk_container_add(GTK_CONTAINER(win), box);
 402   gtk_widget_show(box);
 403
 404   /* --- Last minute configuration things --- */
 405
 406   gtk_widget_grab_default(btn);
 407   gtk_signal_connect(GTK_OBJECT(btn), "clicked",
 408                      GTK_SIGNAL_FUNC(done), &ok);
 409   gtk_signal_connect_object(GTK_OBJECT(entry), "activate",
 410                             GTK_SIGNAL_FUNC(gtk_widget_activate),
 411                             GTK_OBJECT(btn));
 412   cancel(GTK_WINDOW(win), 0);
 413
 414   /* --- Go go go --- */
 415
 416   gtk_widget_realize(win);
 417   mdwfocus(win);
 418   gtk_widget_grab_focus(entry);
 419   gtk_widget_show(win);
 420   gtk_main();
 421
 422   /* --- Output the result --- */
 423
 424   if (ok) {
 425     char *p = gtk_entry_get_text(GTK_ENTRY(entry));
 426
 427     /* --- If history is enabled, output a new history file --- *
 428      *
 429      * If the first entry was accepted verbatim, don't bother.
 430      */
 431
 432     if (f & f_history && !(hist && strcmp(p, hist->data) == 0)) {
 433       int fd;
 434       FILE *fp;
 435       int i;
 436       GList *g;
 437
 438       if ((fd = open(list, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0)
 439         goto fail;
 440       if ((fp = fdopen(fd, "w")) == 0) {
 441         close(fd);
 442         goto fail;
 443       }
 444
 445       fputs(p, fp);
 446       fputc('\n', fp);
 447
 448       for (i = 1, g = hist; (histmax < 1 || i < histmax) && g; g = g->next) {
 449         if (strcmp(g->data, p) != 0) {
 450           fputs(g->data, fp);
 451           fputc('\n', fp);
 452           i++;
 453         }
 454       }
 455       fclose(fp);
 456     fail:;
 457     }
 458
 459     /* --- Print the result and go away --- */
 460
 461     puts(p);
 462   }
 463
 464   return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
 465 }
 466
 467 /*----- That's all, folks -------------------------------------------------*/