Change build structure a bit: put common code in a library.

[xtoys] / xgetline.c

/* -*-c-*-
 *
 * $Id: xgetline.c,v 1.2 1998/11/18 21:25:30 mdw Exp $
 *
 * Fetch a line of text from the user
 *
 * (c) 1998 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------* 
 *
 * This file is part of the Edgeware X tools collection.
 *
 * X tools is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * X tools is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with X tools; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*----- Revision history --------------------------------------------------* 
 *
 * $Log: xgetline.c,v $
 * Revision 1.2  1998/11/18 21:25:30  mdw
 * Remove bogus `-h' option from the options list.
 *
 * Revision 1.1  1998/11/16 23:00:49  mdw
 * Initial versions.
 *
 */

/*----- Header files ------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

#include "mdwopt.h"

/*----- Main code ---------------------------------------------------------*/

/* --- @cancel@ --- *
 *
 * Arguments:	@GtkWidget *w@ = widget raising the signal
 *		@gpointer *p@ = pointer to integer result code
 *
 * Returns:	---
 *
 * Use:		Sets the result code to zero (failure) and ends the loop.
 */

static void cancel(GtkWidget *w, gpointer *p)
{
  int *ip = (int *)p;
  *ip = 0;
  gtk_main_quit();
}

/* --- @done@ --- *
 *
 * Arguments:	@GtkWidget *w@ = widget raising the signal
 *		@gpointer *p@ = pointer to integer result code
 *
 * Returns:	---
 *
 * Use:		Sets the result code nonzero (success) and ends the loop.
 */

static void done(GtkWidget *w, gpointer *p)
{
  int *ip = (int *)p;
  *ip = 1;
  gtk_main_quit();
}

/* --- @check_escape@ --- *
 *
 * Arguments:	@GtkWidget *w@ = widget raising the signal
 *		@GdkEventKey *ev@ = pointer to event data
 *		@gpointer *p@ = widget to activate in response
 *
 * Returns:	---
 *
 * Use:		Activates a widget when an escape keypress is detected.
 */

static gboolean check_escape(GtkWidget *w, GdkEventKey *ev, gpointer *p)
{
  if (ev->keyval == GDK_Escape) {
    if (p)
      gtk_widget_activate(GTK_WIDGET(p));
    else
      gtk_object_destroy(GTK_OBJECT(w));
    return (1);
  }
  return (0);
}

/* --- @main@ --- *
 *
 * Arguments:	@int argc@ = number of command line arguments
 *		@char *argv[]@ = addresses of arguments
 *
 * Returns:	Zero if OK, and we read a string; nonzero if the user
 *		cancelled.
 *
 * Use:		Reads a string from the user, and returns it on standard
 *		output.
 */

int main(int argc, char *argv[])
{
  /* --- Configuration variables --- */

  char *prompt = 0;
  char *dfl = "";
  char *title = "Input request";
  int left;
  unsigned f = 0;
  int ok = 0;

  enum {
    f_invis = 1,
    f_duff = 2
  };

  /* --- User interface bits --- */

  GtkWidget *win;
  GtkWidget *box;
  GtkWidget *entry;
  GtkWidget *btn;

  /* --- Crank up the toolkit --- *
   *
   * Have to do this here: GTK snarfs some command line options which my
   * parser would barf about.
   */   

  gtk_init(&argc, &argv);

  /* --- Parse options from command line --- */

  for (;;) {

    /* --- Long options structure --- */

    static struct option opt[] = {
      { "help",		0,			0,	'h' },
      { "title",	required_argument,	0,	't' },
      { "prompt",	required_argument,	0,	'p' },
      { "default",	required_argument,	0,	'd' },
      { "password",	0,			0,	'i' },
      { "invisible",	0,			0,	'i' },
      { 0,		0,			0,	0 }
    };
    int i;

    /* --- Fetch an option --- */

    i = getopt_long(argc, argv, "t:p:d:i", opt, 0);
    if (i < 0)
      break;

    /* --- Work out what to do with it --- */

    switch (i) {
      case 't':
	title = optarg;
	break;
      case 'p':
	prompt = optarg;
	break;
      case 'd':
	dfl = optarg;
	break;
      case 'i':
	f |= f_invis;
	break;
      default:
	f |= f_duff;
	break;
    }
  }

  if (f & f_duff) {
    fprintf(stderr, "xgetline: bad arguments\n");
    exit(EXIT_FAILURE);
  }

  /* --- Create the main window --- */

  win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW(win), title);
  gtk_window_position(GTK_WINDOW(win), GTK_WIN_POS_MOUSE);
  gtk_signal_connect(GTK_OBJECT(win), "destroy",
		     GTK_SIGNAL_FUNC(cancel), &ok);

  /* --- Create the box for laying out the widgets inside --- */

  left = (prompt ? 1 : 0);
  box = gtk_table_new(left + 2, 1, 0);

  /* --- Maybe create a prompt widget --- */

  if (prompt) {
    GtkWidget *w = gtk_label_new(prompt);
    gtk_table_attach(GTK_TABLE(box), w,
		     0, 1, 0, 1, 0, GTK_EXPAND, 4, 2);
    gtk_widget_show(w);
  }

  /* --- Create the entry widget --- */

  entry = gtk_entry_new();
  gtk_entry_set_text(GTK_ENTRY(entry), dfl);
  gtk_table_attach(GTK_TABLE(box), entry,
		   left, left + 1, 0, 1,
		   GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
  if (f & f_invis)
    gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE);
  gtk_widget_show(entry);

  /* --- Create the default action widget --- */

  btn = gtk_button_new_with_label("OK");
  gtk_table_attach(GTK_TABLE(box), btn,
		   left + 1, left + 2, 0, 1, 0, GTK_EXPAND, 2, 2);
  GTK_WIDGET_SET_FLAGS(btn, GTK_CAN_DEFAULT);
  gtk_widget_show(btn);

  /* --- Add the box into the main window --- */

  gtk_container_add(GTK_CONTAINER(win), box);
  gtk_widget_show(box);

  /* --- Last minute configuration things --- */

  gtk_widget_grab_default(btn);
  gtk_signal_connect(GTK_OBJECT(btn), "clicked",
		     GTK_SIGNAL_FUNC(done), &ok);
  gtk_signal_connect_object(GTK_OBJECT(entry), "activate",
			    GTK_SIGNAL_FUNC(gtk_widget_activate),
			    GTK_OBJECT(btn));
  gtk_signal_connect(GTK_OBJECT(win), "key_press_event",
		     GTK_SIGNAL_FUNC(check_escape), 0);

  /* --- Go go go --- */

  gtk_widget_show(win);
  gtk_main();

  /* --- Output the result --- */

  if (ok) {
    char *p = gtk_entry_get_text(GTK_ENTRY(entry));
    puts(p);
  }

  return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}

/*----- That's all, folks -------------------------------------------------*/