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

   1 /* -*-c-*-
   2  *
   3  * $Id: xgetline.c,v 1.5 1998/12/03 00:39:44 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 1.5  1998/12/03 00:39:44  mdw
  33  * Force focus when starting up.
  34  *
  35  * Revision 1.4  1998/11/30 22:36:47  mdw
  36  * Tidy up tabbing in help texts very slightly.
  37  *
  38  * Revision 1.3  1998/11/21 22:30:20  mdw
  39  * Support GNU-style long options throughout, and introduce proper help
  40  * text to all programs.  Update manual pages to match.
  41  *
  42  * Revision 1.2  1998/11/18 21:25:30  mdw
  43  * Remove bogus `-h' option from the options list.
  44  *
  45  * Revision 1.1  1998/11/16 23:00:49  mdw
  46  * Initial versions.
  47  *
  48  */
  49
  50 /*----- Header files ------------------------------------------------------*/
  51
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #include <gtk/gtk.h>
  57 #include <gdk/gdkkeysyms.h>
  58
  59 #include "mdwfocus.h"
  60 #include "mdwopt.h"
  61 #include "quis.h"
  62
  63 /*----- Main code ---------------------------------------------------------*/
  64
  65 /* --- @cancel@ --- *
  66  *
  67  * Arguments:   @GtkWidget *w@ = widget raising the signal
  68  *              @gpointer *p@ = pointer to integer result code
  69  *
  70  * Returns:     ---
  71  *
  72  * Use:         Sets the result code to zero (failure) and ends the loop.
  73  */
  74
  75 static void cancel(GtkWidget *w, gpointer *p)
  76 {
  77   int *ip = (int *)p;
  78   *ip = 0;
  79   gtk_main_quit();
  80 }
  81
  82 /* --- @done@ --- *
  83  *
  84  * Arguments:   @GtkWidget *w@ = widget raising the signal
  85  *              @gpointer *p@ = pointer to integer result code
  86  *
  87  * Returns:     ---
  88  *
  89  * Use:         Sets the result code nonzero (success) and ends the loop.
  90  */
  91
  92 static void done(GtkWidget *w, gpointer *p)
  93 {
  94   int *ip = (int *)p;
  95   *ip = 1;
  96   gtk_main_quit();
  97 }
  98
  99 /* --- @check_escape@ --- *
 100  *
 101  * Arguments:   @GtkWidget *w@ = widget raising the signal
 102  *              @GdkEventKey *ev@ = pointer to event data
 103  *              @gpointer *p@ = widget to activate in response
 104  *
 105  * Returns:     ---
 106  *
 107  * Use:         Activates a widget when an escape keypress is detected.
 108  */
 109
 110 static gboolean check_escape(GtkWidget *w, GdkEventKey *ev, gpointer *p)
 111 {
 112   if (ev->keyval == GDK_Escape) {
 113     if (p)
 114       gtk_widget_activate(GTK_WIDGET(p));
 115     else
 116       gtk_object_destroy(GTK_OBJECT(w));
 117     return (1);
 118   }
 119   return (0);
 120 }
 121
 122 /* --- @version@ --- *
 123  *
 124  * Arguments:   @FILE *fp@ = output stream to print the message on
 125  *
 126  * Returns:     ---
 127  *
 128  * Use:         Spits out a version message.
 129  */
 130
 131 static void version(FILE *fp)
 132 {
 133   fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
 134 }
 135
 136 /* --- @usage@ --- *
 137  *
 138  * Arguments:   @FILE *fp@ = output stream to print the message on
 139  *
 140  * Returns:     ---
 141  *
 142  * Use:         Spits out a usage message.
 143  */
 144
 145 static void usage(FILE *fp)
 146 {
 147   fprintf(fp, "Usage: %s [-i] [-t title] [-p prompt] [-d default]\n", QUIS);
 148 }
 149
 150 /* --- @main@ --- *
 151  *
 152  * Arguments:   @int argc@ = number of command line arguments
 153  *              @char *argv[]@ = addresses of arguments
 154  *
 155  * Returns:     Zero if OK, and we read a string; nonzero if the user
 156  *              cancelled.
 157  *
 158  * Use:         Reads a string from the user, and returns it on standard
 159  *              output.
 160  */
 161
 162 int main(int argc, char *argv[])
 163 {
 164   /* --- Configuration variables --- */
 165
 166   char *prompt = 0;
 167   char *dfl = "";
 168   char *title = "Input request";
 169   int left;
 170   unsigned f = 0;
 171   int ok = 0;
 172
 173   enum {
 174     f_invis = 1,
 175     f_duff = 2
 176   };
 177
 178   /* --- User interface bits --- */
 179
 180   GtkWidget *win;
 181   GtkWidget *box;
 182   GtkWidget *entry;
 183   GtkWidget *btn;
 184
 185   /* --- Crank up the toolkit --- *
 186    *
 187    * Have to do this here: GTK snarfs some command line options which my
 188    * parser would barf about.
 189    */
 190
 191   ego(argv[0]);
 192   gtk_init(&argc, &argv);
 193
 194   /* --- Parse options from command line --- */
 195
 196   for (;;) {
 197
 198     /* --- Long options structure --- */
 199
 200     static struct option opt[] = {
 201       { "help",         0,                      0,      'h' },
 202       { "usage",        0,                      0,      'u' },
 203       { "version",      0,                      0,      'v' },
 204       { "title",        required_argument,      0,      't' },
 205       { "prompt",       required_argument,      0,      'p' },
 206       { "default",      required_argument,      0,      'd' },
 207       { "password",     0,                      0,      'i' },
 208       { "invisible",    0,                      0,      'i' },
 209       { 0,              0,                      0,      0 }
 210     };
 211     int i;
 212
 213     /* --- Fetch an option --- */
 214
 215     i = getopt_long(argc, argv, "huv t:p:d:i", opt, 0);
 216     if (i < 0)
 217       break;
 218
 219     /* --- Work out what to do with it --- */
 220
 221     switch (i) {
 222       case 'h':
 223         version(stdout);
 224         fputs("\n", stdout);
 225         usage(stdout);
 226         fputs(
 227 "\n"
 228 "Pops up a small window requesting input from a user, and echoes the\n"
 229 "response to stdout, where it can be collected by a shell script.\n"
 230 "\n"
 231 "Options available are:\n"
 232 "\n"
 233 "-h, --help             Display this help text\n"
 234 "-u, --usage            Display a short usage summary\n"
 235 "-v, --version          Display the program's version number\n"
 236 "\n"
 237 "-i, --invisible\t      Don't show the user's string as it's typed\n"
 238 "-t, --title=TITLE      Set the window's title string\n"
 239 "-p, --prompt=PROMPT    Set the window's prompt string\n"
 240 "-d, --default=DEFAULT  Set the default string already in the window\n",
 241           stdout);
 242         exit(0);
 243         break;
 244       case 'u':
 245         usage(stdout);
 246         exit(0);
 247         break;
 248       case 'v':
 249         version(stdout);
 250         exit(0);
 251         break;
 252
 253       case 't':
 254         title = optarg;
 255         break;
 256       case 'p':
 257         prompt = optarg;
 258         break;
 259       case 'd':
 260         dfl = optarg;
 261         break;
 262       case 'i':
 263         f |= f_invis;
 264         break;
 265       default:
 266         f |= f_duff;
 267         break;
 268     }
 269   }
 270
 271   if (f & f_duff) {
 272     usage(stderr);
 273     exit(EXIT_FAILURE);
 274   }
 275
 276   /* --- Create the main window --- */
 277
 278   win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 279   gtk_window_set_title(GTK_WINDOW(win), title);
 280   gtk_window_position(GTK_WINDOW(win), GTK_WIN_POS_MOUSE);
 281   gtk_signal_connect(GTK_OBJECT(win), "destroy",
 282                      GTK_SIGNAL_FUNC(cancel), &ok);
 283
 284   /* --- Create the box for laying out the widgets inside --- */
 285
 286   left = (prompt ? 1 : 0);
 287   box = gtk_table_new(left + 2, 1, 0);
 288
 289   /* --- Maybe create a prompt widget --- */
 290
 291   if (prompt) {
 292     GtkWidget *w = gtk_label_new(prompt);
 293     gtk_table_attach(GTK_TABLE(box), w,
 294                      0, 1, 0, 1, 0, GTK_EXPAND, 4, 2);
 295     gtk_widget_show(w);
 296   }
 297
 298   /* --- Create the entry widget --- */
 299
 300   entry = gtk_entry_new();
 301   gtk_entry_set_text(GTK_ENTRY(entry), dfl);
 302   gtk_table_attach(GTK_TABLE(box), entry,
 303                    left, left + 1, 0, 1,
 304                    GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
 305   if (f & f_invis)
 306     gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE);
 307   gtk_widget_show(entry);
 308
 309   /* --- Create the default action widget --- */
 310
 311   btn = gtk_button_new_with_label("OK");
 312   gtk_table_attach(GTK_TABLE(box), btn,
 313                    left + 1, left + 2, 0, 1, 0, GTK_EXPAND, 2, 2);
 314   GTK_WIDGET_SET_FLAGS(btn, GTK_CAN_DEFAULT);
 315   gtk_widget_show(btn);
 316
 317   /* --- Add the box into the main window --- */
 318
 319   gtk_container_add(GTK_CONTAINER(win), box);
 320   gtk_widget_show(box);
 321
 322   /* --- Last minute configuration things --- */
 323
 324   gtk_widget_grab_default(btn);
 325   gtk_signal_connect(GTK_OBJECT(btn), "clicked",
 326                      GTK_SIGNAL_FUNC(done), &ok);
 327   gtk_signal_connect_object(GTK_OBJECT(entry), "activate",
 328                             GTK_SIGNAL_FUNC(gtk_widget_activate),
 329                             GTK_OBJECT(btn));
 330   gtk_signal_connect(GTK_OBJECT(win), "key_press_event",
 331                      GTK_SIGNAL_FUNC(check_escape), 0);
 332
 333   /* --- Go go go --- */
 334
 335   gtk_widget_realize(win);
 336   mdwfocus(win);
 337   gtk_widget_show(win);
 338   gtk_main();
 339
 340   /* --- Output the result --- */
 341
 342   if (ok) {
 343     char *p = gtk_entry_get_text(GTK_ENTRY(entry));
 344     puts(p);
 345   }
 346
 347   return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
 348 }
 349
 350 /*----- That's all, folks -------------------------------------------------*/