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

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