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-rw-r--r--contrib/texinfo/info/variables.c305
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diff --git a/contrib/texinfo/info/variables.c b/contrib/texinfo/info/variables.c
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--- a/contrib/texinfo/info/variables.c
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-/* variables.c -- how to manipulate user visible variables in Info.
- $Id: variables.c,v 1.3 2004/04/11 17:56:46 karl Exp $
-
- Copyright (C) 1993, 1997, 2001, 2002, 2004 Free Software Foundation, Inc.
-
- This program 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, or (at your option)
- any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- Written by Brian Fox (bfox@ai.mit.edu). */
-
-#include "info.h"
-#include "variables.h"
-
-/* **************************************************************** */
-/* */
-/* User Visible Variables in Info */
-/* */
-/* **************************************************************** */
-
-/* Choices used by the completer when reading a zero/non-zero value for
- a variable. */
-static char *on_off_choices[] = { "Off", "On", (char *)NULL };
-
-VARIABLE_ALIST info_variables[] = {
- { "automatic-footnotes",
- N_("When \"On\", footnotes appear and disappear automatically"),
- &auto_footnotes_p, (char **)on_off_choices },
-
- { "automatic-tiling",
- N_("When \"On\", creating or deleting a window resizes other windows"),
- &auto_tiling_p, (char **)on_off_choices },
-
- { "visible-bell",
- N_("When \"On\", flash the screen instead of ringing the bell"),
- &terminal_use_visible_bell_p, (char **)on_off_choices },
-
- { "errors-ring-bell",
- N_("When \"On\", errors cause the bell to ring"),
- &info_error_rings_bell_p, (char **)on_off_choices },
-
- { "gc-compressed-files",
- N_("When \"On\", Info garbage collects files which had to be uncompressed"),
- &gc_compressed_files, (char **)on_off_choices },
- { "show-index-match",
- N_("When \"On\", the portion of the matched search string is highlighted"),
- &show_index_match, (char **)on_off_choices },
-
- { "scroll-behaviour",
- N_("Controls what happens when scrolling is requested at the end of a node"),
- &info_scroll_behaviour, (char **)info_scroll_choices },
-
- { "scroll-step",
- N_("The number lines to scroll when the cursor moves out of the window"),
- &window_scroll_step, (char **)NULL },
-
- { "ISO-Latin",
- N_("When \"On\", Info accepts and displays ISO Latin characters"),
- &ISO_Latin_p, (char **)on_off_choices },
-
- { (char *)NULL, (char *)NULL, (int *)NULL, (char **)NULL }
-};
-
-DECLARE_INFO_COMMAND (describe_variable, _("Explain the use of a variable"))
-{
- VARIABLE_ALIST *var;
- char *description;
-
- /* Get the variable's name. */
- var = read_variable_name ((char *) _("Describe variable: "), window);
-
- if (!var)
- return;
-
- description = (char *)xmalloc (20 + strlen (var->name)
- + strlen (_(var->doc)));
-
- if (var->choices)
- sprintf (description, "%s (%s): %s.",
- var->name, var->choices[*(var->value)], _(var->doc));
- else
- sprintf (description, "%s (%d): %s.",
- var->name, *(var->value), _(var->doc));
-
- window_message_in_echo_area ("%s", description, NULL);
- free (description);
-}
-
-DECLARE_INFO_COMMAND (set_variable, _("Set the value of an Info variable"))
-{
- VARIABLE_ALIST *var;
- char *line;
-
- /* Get the variable's name and value. */
- var = read_variable_name ((char *) _("Set variable: "), window);
-
- if (!var)
- return;
-
- /* Read a new value for this variable. */
- {
- char prompt[100];
-
- if (!var->choices)
- {
- int potential_value;
-
- if (info_explicit_arg || count != 1)
- potential_value = count;
- else
- potential_value = *(var->value);
-
- sprintf (prompt, _("Set %s to value (%d): "),
- var->name, potential_value);
- line = info_read_in_echo_area (active_window, prompt);
-
- /* If no error was printed, clear the echo area. */
- if (!info_error_was_printed)
- window_clear_echo_area ();
-
- /* User aborted? */
- if (!line)
- return;
-
- /* If the user specified a value, get that, otherwise, we are done. */
- canonicalize_whitespace (line);
- if (*line)
- *(var->value) = atoi (line);
- else
- *(var->value) = potential_value;
-
- free (line);
- }
- else
- {
- register int i;
- REFERENCE **array = (REFERENCE **)NULL;
- int array_index = 0;
- int array_slots = 0;
-
- for (i = 0; var->choices[i]; i++)
- {
- REFERENCE *entry;
-
- entry = (REFERENCE *)xmalloc (sizeof (REFERENCE));
- entry->label = xstrdup (var->choices[i]);
- entry->nodename = (char *)NULL;
- entry->filename = (char *)NULL;
-
- add_pointer_to_array
- (entry, array_index, array, array_slots, 10, REFERENCE *);
- }
-
- sprintf (prompt, _("Set %s to value (%s): "),
- var->name, var->choices[*(var->value)]);
-
- /* Ask the completer to read a variable value for us. */
- line = info_read_completing_in_echo_area (window, prompt, array);
-
- info_free_references (array);
-
- if (!echo_area_is_active)
- window_clear_echo_area ();
-
- /* User aborted? */
- if (!line)
- {
- info_abort_key (active_window, 0, 0);
- return;
- }
-
- /* User accepted default choice? If so, no change. */
- if (!*line)
- {
- free (line);
- return;
- }
-
- /* Find the choice in our list of choices. */
- for (i = 0; var->choices[i]; i++)
- if (strcmp (var->choices[i], line) == 0)
- break;
-
- if (var->choices[i])
- *(var->value) = i;
- }
- }
-}
-
-/* Read the name of an Info variable in the echo area and return the
- address of a VARIABLE_ALIST member. A return value of NULL indicates
- that no variable could be read. */
-VARIABLE_ALIST *
-read_variable_name (char *prompt, WINDOW *window)
-{
- register int i;
- char *line;
- REFERENCE **variables;
-
- /* Get the completion array of variable names. */
- variables = make_variable_completions_array ();
-
- /* Ask the completer to read a variable for us. */
- line =
- info_read_completing_in_echo_area (window, prompt, variables);
-
- info_free_references (variables);
-
- if (!echo_area_is_active)
- window_clear_echo_area ();
-
- /* User aborted? */
- if (!line)
- {
- info_abort_key (active_window, 0, 0);
- return ((VARIABLE_ALIST *)NULL);
- }
-
- /* User accepted "default"? (There is none.) */
- if (!*line)
- {
- free (line);
- return ((VARIABLE_ALIST *)NULL);
- }
-
- /* Find the variable in our list of variables. */
- for (i = 0; info_variables[i].name; i++)
- if (strcmp (info_variables[i].name, line) == 0)
- break;
-
- if (!info_variables[i].name)
- return ((VARIABLE_ALIST *)NULL);
- else
- return (&(info_variables[i]));
-}
-
-/* Make an array of REFERENCE which actually contains the names of the
- variables available in Info. */
-REFERENCE **
-make_variable_completions_array (void)
-{
- register int i;
- REFERENCE **array = (REFERENCE **)NULL;
- int array_index = 0, array_slots = 0;
-
- for (i = 0; info_variables[i].name; i++)
- {
- REFERENCE *entry;
-
- entry = (REFERENCE *) xmalloc (sizeof (REFERENCE));
- entry->label = xstrdup (info_variables[i].name);
- entry->nodename = (char *)NULL;
- entry->filename = (char *)NULL;
-
- add_pointer_to_array
- (entry, array_index, array, array_slots, 200, REFERENCE *);
- }
-
- return (array);
-}
-
-#if defined(INFOKEY)
-
-void
-set_variable_to_value(char *name, char *value)
-{
- register int i;
-
- /* Find the variable in our list of variables. */
- for (i = 0; info_variables[i].name; i++)
- if (strcmp(info_variables[i].name, name) == 0)
- break;
-
- if (!info_variables[i].name)
- return;
-
- if (info_variables[i].choices)
- {
- register int j;
-
- /* Find the choice in our list of choices. */
- for (j = 0; info_variables[i].choices[j]; j++)
- if (strcmp (info_variables[i].choices[j], value) == 0)
- break;
-
- if (info_variables[i].choices[j])
- *info_variables[i].value = j;
- }
- else
- {
- *info_variables[i].value = atoi(value);
- }
-}
-
-#endif /* INFOKEY */
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