/* $NetBSD: variables.c,v 1.1.1.1 2016/01/14 00:11:29 christos Exp $ */ /* 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 */