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freebsd/contrib/texinfo/info/info.c
Ruslan Ermilov c332585b53 Import of stripped down GNU texinfo 4.6
2003-06-18 12:57:43 +00:00

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/* info.c -- Display nodes of Info files in multiple windows.
$Id: info.c,v 1.7 2003/05/19 13:10:59 karl Exp $
Copyright (C) 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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 "indices.h"
#include "dribble.h"
#include "getopt.h"
#if defined (HANDLE_MAN_PAGES)
# include "man.h"
#endif /* HANDLE_MAN_PAGES */
static char *program_name = "info";
/* Non-zero means search all indices for APROPOS_SEARCH_STRING. */
static int apropos_p = 0;
/* Variable containing the string to search for when apropos_p is non-zero. */
static char *apropos_search_string = (char *)NULL;
/* Non-zero means search all indices for INDEX_SEARCH_STRING. Unlike
apropos, this puts the user at the node, running info. */
static int index_search_p = 0;
/* Non-zero means look for the node which describes the invocation
and command-line options of the program, and start the info
session at that node. */
static int goto_invocation_p = 0;
/* Variable containing the string to search for when index_search_p is
non-zero. */
static char *index_search_string = (char *)NULL;
/* Non-zero means print version info only. */
static int print_version_p = 0;
/* Non-zero means print a short description of the options. */
static int print_help_p = 0;
/* Array of the names of nodes that the user specified with "--node" on the
command line. */
static char **user_nodenames = (char **)NULL;
static int user_nodenames_index = 0;
static int user_nodenames_slots = 0;
/* String specifying the first file to load. This string can only be set
by the user specifying "--file" on the command line. */
static char *user_filename = (char *)NULL;
/* String specifying the name of the file to dump nodes to. This value is
filled if the user speficies "--output" on the command line. */
static char *user_output_filename = (char *)NULL;
/* Non-zero indicates that when "--output" is specified, all of the menu
items of the specified nodes (and their subnodes as well) should be
dumped in the order encountered. This basically can print a book. */
int dump_subnodes = 0;
/* Non-zero means make default keybindings be loosely modeled on vi(1). */
int vi_keys_p = 0;
/* Non-zero means don't remove ANSI escape sequences from man pages. */
int raw_escapes_p = 0;
#ifdef __MSDOS__
/* Non-zero indicates that screen output should be made 'speech-friendly'.
Since on MSDOS the usual behavior is to write directly to the video
memory, speech synthesizer software cannot grab the output. Therefore,
we provide a user option which tells us to avoid direct screen output
and use stdout instead (which loses the color output). */
int speech_friendly = 0;
#endif
/* Structure describing the options that Info accepts. We pass this structure
to getopt_long (). If you add or otherwise change this structure, you must
also change the string which follows it. */
#define APROPOS_OPTION 1
#define DRIBBLE_OPTION 2
#define RESTORE_OPTION 3
#define IDXSRCH_OPTION 4
static struct option long_options[] = {
{ "apropos", 1, 0, APROPOS_OPTION },
{ "directory", 1, 0, 'd' },
{ "dribble", 1, 0, DRIBBLE_OPTION },
{ "file", 1, 0, 'f' },
{ "help", 0, &print_help_p, 1 },
{ "index-search", 1, 0, IDXSRCH_OPTION },
{ "node", 1, 0, 'n' },
{ "output", 1, 0, 'o' },
{ "raw-escapes", 0, &raw_escapes_p, 1 },
{ "restore", 1, 0, RESTORE_OPTION },
{ "show-options", 0, 0, 'O' },
{ "subnodes", 0, &dump_subnodes, 1 },
{ "usage", 0, 0, 'O' },
{ "version", 0, &print_version_p, 1 },
{ "vi-keys", 0, &vi_keys_p, 1 },
#ifdef __MSDOS__
{ "speech-friendly", 0, &speech_friendly, 1 },
#endif
{NULL, 0, NULL, 0}
};
/* String describing the shorthand versions of the long options found above. */
#ifdef __MSDOS__
static char *short_options = "d:n:f:ho:ORsb";
#else
static char *short_options = "d:n:f:ho:ORs";
#endif
/* When non-zero, the Info window system has been initialized. */
int info_windows_initialized_p = 0;
/* Some "forward" declarations. */
static void info_short_help ();
static void init_messages ();
extern void add_file_directory_to_path ();
/* **************************************************************** */
/* */
/* Main Entry Point to the Info Program */
/* */
/* **************************************************************** */
int
main (argc, argv)
int argc;
char **argv;
{
int getopt_long_index; /* Index returned by getopt_long (). */
NODE *initial_node; /* First node loaded by Info. */
#ifdef HAVE_SETLOCALE
/* Set locale via LC_ALL. */
setlocale (LC_ALL, "");
#endif
/* Set the text message domain. */
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
init_messages ();
while (1)
{
int option_character;
option_character = getopt_long
(argc, argv, short_options, long_options, &getopt_long_index);
/* getopt_long returns EOF when there are no more long options. */
if (option_character == EOF)
break;
/* If this is a long option, then get the short version of it. */
if (option_character == 0 && long_options[getopt_long_index].flag == 0)
option_character = long_options[getopt_long_index].val;
/* Case on the option that we have received. */
switch (option_character)
{
case 0:
break;
/* User wants to add a directory. */
case 'd':
info_add_path (optarg, INFOPATH_PREPEND);
break;
/* User is specifying a particular node. */
case 'n':
add_pointer_to_array (optarg, user_nodenames_index, user_nodenames,
user_nodenames_slots, 10, char *);
break;
/* User is specifying a particular Info file. */
case 'f':
if (user_filename)
free (user_filename);
user_filename = xstrdup (optarg);
break;
/* Treat -h like --help. */
case 'h':
print_help_p = 1;
break;
/* User is specifying the name of a file to output to. */
case 'o':
if (user_output_filename)
free (user_output_filename);
user_output_filename = xstrdup (optarg);
break;
/* User has specified that she wants to find the "Options"
or "Invocation" node for the program. */
case 'O':
goto_invocation_p = 1;
break;
/* User has specified that she wants the escape sequences
in man pages to be passed thru unaltered. */
case 'R':
raw_escapes_p = 1;
break;
/* User is specifying that she wishes to dump the subnodes of
the node that she is dumping. */
case 's':
dump_subnodes = 1;
break;
#ifdef __MSDOS__
/* User wants speech-friendly output. */
case 'b':
speech_friendly = 1;
break;
#endif /* __MSDOS__ */
/* User has specified a string to search all indices for. */
case APROPOS_OPTION:
apropos_p = 1;
maybe_free (apropos_search_string);
apropos_search_string = xstrdup (optarg);
break;
/* User has specified a dribble file to receive keystrokes. */
case DRIBBLE_OPTION:
close_dribble_file ();
open_dribble_file (optarg);
break;
/* User has specified an alternate input stream. */
case RESTORE_OPTION:
info_set_input_from_file (optarg);
break;
/* User has specified a string to search all indices for. */
case IDXSRCH_OPTION:
index_search_p = 1;
maybe_free (index_search_string);
index_search_string = xstrdup (optarg);
break;
default:
fprintf (stderr, _("Try --help for more information.\n"));
xexit (1);
}
}
/* If the output device is not a terminal, and no output filename has been
specified, make user_output_filename be "-", so that the info is written
to stdout, and turn on the dumping of subnodes. */
if ((!isatty (fileno (stdout))) && (user_output_filename == (char *)NULL))
{
user_output_filename = xstrdup ("-");
dump_subnodes = 1;
}
/* If the user specified --version, then show the version and exit. */
if (print_version_p)
{
printf ("%s (GNU %s) %s\n", program_name, PACKAGE, VERSION);
puts ("");
printf (_("Copyright (C) %s Free Software Foundation, Inc.\n\
There is NO warranty. You may redistribute this software\n\
under the terms of the GNU General Public License.\n\
For more information about these matters, see the files named COPYING.\n"),
"2003");
xexit (0);
}
/* If the `--help' option was present, show the help and exit. */
if (print_help_p)
{
info_short_help ();
xexit (0);
}
/* If the user hasn't specified a path for Info files, default it.
Lowest priority is our messy hardwired list in filesys.h.
Then comes the user's INFODIR from the Makefile.
Highest priority is the environment variable, if set. */
if (!infopath)
{
char *path_from_env = getenv ("INFOPATH");
if (path_from_env)
{
unsigned len = strlen (path_from_env);
/* Trailing : on INFOPATH means insert the default path. */
if (len && path_from_env[len - 1] == PATH_SEP[0])
{
path_from_env[len - 1] = 0;
info_add_path (DEFAULT_INFOPATH, INFOPATH_PREPEND);
}
#ifdef INFODIR /* from the Makefile */
info_add_path (INFODIR, INFOPATH_PREPEND);
#endif
info_add_path (path_from_env, INFOPATH_PREPEND);
}
else
{
info_add_path (DEFAULT_INFOPATH, INFOPATH_PREPEND);
#ifdef INFODIR /* from the Makefile */
info_add_path (INFODIR, INFOPATH_PREPEND);
#endif
}
}
/* If the user specified a particular filename, add the path of that
file to the contents of INFOPATH. */
if (user_filename)
add_file_directory_to_path (user_filename);
/* If the user wants to search every known index for a given string,
do that now, and report the results. */
if (apropos_p)
{
info_apropos (apropos_search_string);
xexit (0);
}
/* Get the initial Info node. It is either "(dir)Top", or what the user
specifed with values in user_filename and user_nodenames. */
initial_node = info_get_node (user_filename,
user_nodenames ? user_nodenames[0] : 0);
/* If we couldn't get the initial node, this user is in trouble. */
if (!initial_node)
{
if (info_recent_file_error)
info_error (info_recent_file_error);
else
info_error (msg_cant_find_node,
user_nodenames ? user_nodenames[0] : "Top");
xexit (1);
}
/* Special cases for when the user specifies multiple nodes. If we
are dumping to an output file, dump all of the nodes specified.
Otherwise, attempt to create enough windows to handle the nodes
that this user wants displayed. */
if (user_nodenames_index > 1)
{
free (initial_node);
if (user_output_filename)
dump_nodes_to_file
(user_filename, user_nodenames, user_output_filename, dump_subnodes);
else
begin_multiple_window_info_session (user_filename, user_nodenames);
xexit (0);
}
/* If there are arguments remaining, they are the names of menu items
in sequential info files starting from the first one loaded. That
file name is either "dir", or the contents of user_filename if one
was specified. */
{
char *errstr, *errarg1, *errarg2;
NODE *new_initial_node = info_follow_menus (initial_node, argv + optind,
&errstr, &errarg1, &errarg2);
if (new_initial_node && new_initial_node != initial_node)
initial_node = new_initial_node;
/* If the user specified that this node should be output, then do that
now. Otherwise, start the Info session with this node. Or act
accordingly if the initial node was not found. */
if (user_output_filename && !goto_invocation_p)
{
if (!errstr)
dump_node_to_file (initial_node, user_output_filename,
dump_subnodes);
else
info_error (errstr, errarg1, errarg2);
}
else
{
if (errstr)
begin_info_session_with_error (initial_node, errstr,
errarg1, errarg2);
/* If the user specified `--index-search=STRING' or
--show-options, start the info session in the node
corresponding to what they want. */
else if (index_search_p || goto_invocation_p)
{
int status = 0;
initialize_info_session (initial_node, 0);
if (goto_invocation_p
|| index_entry_exists (windows, index_search_string))
{
terminal_prep_terminal ();
terminal_clear_screen ();
info_last_executed_command = (VFunction *)NULL;
if (index_search_p)
do_info_index_search (windows, 0, index_search_string);
else
{
/* If they said "info --show-options foo bar baz",
the last of the arguments is the program whose
options they want to see. */
char **p = argv + optind;
char *program;
if (*p)
{
while (p[1])
p++;
program = xstrdup (*p);
}
else if (user_filename)
/* If there's no command-line arguments to
supply the program name, use the Info file
name (sans extension and leading directories)
instead. */
program = program_name_from_file_name (user_filename);
else
program = xstrdup ("");
info_intuit_options_node (windows, initial_node, program);
free (program);
}
if (user_output_filename)
{
dump_node_to_file (windows->node, user_output_filename,
dump_subnodes);
}
else
info_read_and_dispatch ();
/* On program exit, leave the cursor at the bottom of the
window, and restore the terminal IO. */
terminal_goto_xy (0, screenheight - 1);
terminal_clear_to_eol ();
fflush (stdout);
terminal_unprep_terminal ();
}
else
{
fprintf (stderr, _("no index entries found for `%s'\n"),
index_search_string);
status = 2;
}
close_dribble_file ();
xexit (status);
}
else
begin_info_session (initial_node);
}
xexit (0);
}
return 0; /* Avoid bogus warnings. */
}
void
add_file_directory_to_path (filename)
char *filename;
{
char *directory_name = xstrdup (filename);
char *temp = filename_non_directory (directory_name);
if (temp != directory_name)
{
if (HAVE_DRIVE (directory_name) && temp == directory_name + 2)
{
/* The directory of "d:foo" is stored as "d:.", to avoid
mixing it with "d:/" when a slash is appended. */
*temp = '.';
temp += 2;
}
temp[-1] = 0;
info_add_path (directory_name, INFOPATH_PREPEND);
}
free (directory_name);
}
/* Error handling. */
/* Non-zero if an error has been signalled. */
int info_error_was_printed = 0;
/* Non-zero means ring terminal bell on errors. */
int info_error_rings_bell_p = 1;
/* Print FORMAT with ARG1 and ARG2. If the window system was initialized,
then the message is printed in the echo area. Otherwise, a message is
output to stderr. */
void
info_error (format, arg1, arg2)
char *format;
void *arg1, *arg2;
{
info_error_was_printed = 1;
if (!info_windows_initialized_p || display_inhibited)
{
fprintf (stderr, "%s: ", program_name);
fprintf (stderr, format, arg1, arg2);
fprintf (stderr, "\n");
fflush (stderr);
}
else
{
if (!echo_area_is_active)
{
if (info_error_rings_bell_p)
terminal_ring_bell ();
window_message_in_echo_area (format, arg1, arg2);
}
else
{
NODE *temp;
temp = build_message_node (format, arg1, arg2);
if (info_error_rings_bell_p)
terminal_ring_bell ();
inform_in_echo_area (temp->contents);
free (temp->contents);
free (temp);
}
}
}
/* Produce a scaled down description of the available options to Info. */
static void
info_short_help ()
{
#ifdef __MSDOS__
static const char speech_friendly_string[] = N_("\
-b, --speech-friendly be friendly to speech synthesizers.\n");
#else
static const char speech_friendly_string[] = "";
#endif
printf (_("\
Usage: %s [OPTION]... [MENU-ITEM...]\n\
\n\
Read documentation in Info format.\n\
\n\
Options:\n\
--apropos=STRING look up STRING in all indices of all manuals.\n\
-d, --directory=DIR add DIR to INFOPATH.\n\
--dribble=FILENAME remember user keystrokes in FILENAME.\n\
-f, --file=FILENAME specify Info file to visit.\n\
-h, --help display this help and exit.\n\
--index-search=STRING go to node pointed by index entry STRING.\n\
-n, --node=NODENAME specify nodes in first visited Info file.\n\
-o, --output=FILENAME output selected nodes to FILENAME.\n\
-R, --raw-escapes don't remove ANSI escapes from man pages.\n\
--restore=FILENAME read initial keystrokes from FILENAME.\n\
-O, --show-options, --usage go to command-line options node.\n%s\
--subnodes recursively output menu items.\n\
--vi-keys use vi-like and less-like key bindings.\n\
--version display version information and exit.\n\
\n\
The first non-option argument, if present, is the menu entry to start from;\n\
it is searched for in all `dir' files along INFOPATH.\n\
If it is not present, info merges all `dir' files and shows the result.\n\
Any remaining arguments are treated as the names of menu\n\
items relative to the initial node visited.\n\
\n\
Examples:\n\
info show top-level dir menu\n\
info emacs start at emacs node from top-level dir\n\
info emacs buffers start at buffers node within emacs manual\n\
info --show-options emacs start at node with emacs' command line options\n\
info -f ./foo.info show file ./foo.info, not searching dir\n\
"),
program_name, speech_friendly_string);
puts (_("\n\
Email bug reports to bug-texinfo@gnu.org,\n\
general questions and discussion to help-texinfo@gnu.org.\n\
Texinfo home page: http://www.gnu.org/software/texinfo/"));
xexit (0);
}
/* Initialize strings for gettext. Because gettext doesn't handle N_ or
_ within macro definitions, we put shared messages into variables and
use them that way. This also has the advantage that there's only one
copy of the strings. */
const char *msg_cant_find_node;
const char *msg_cant_file_node;
const char *msg_cant_find_window;
const char *msg_cant_find_point;
const char *msg_cant_kill_last;
const char *msg_no_menu_node;
const char *msg_no_foot_node;
const char *msg_no_xref_node;
const char *msg_no_pointer;
const char *msg_unknown_command;
const char *msg_term_too_dumb;
const char *msg_at_node_bottom;
const char *msg_at_node_top;
const char *msg_one_window;
const char *msg_win_too_small;
const char *msg_cant_make_help;
static void
init_messages ()
{
msg_cant_find_node = _("Cannot find node `%s'.");
msg_cant_file_node = _("Cannot find node `(%s)%s'.");
msg_cant_find_window = _("Cannot find a window!");
msg_cant_find_point = _("Point doesn't appear within this window's node!");
msg_cant_kill_last = _("Cannot delete the last window.");
msg_no_menu_node = _("No menu in this node.");
msg_no_foot_node = _("No footnotes in this node.");
msg_no_xref_node = _("No cross references in this node.");
msg_no_pointer = _("No `%s' pointer for this node.");
msg_unknown_command = _("Unknown Info command `%c'; try `?' for help.");
msg_term_too_dumb = _("Terminal type `%s' is not smart enough to run Info.");
msg_at_node_bottom = _("You are already at the last page of this node.");
msg_at_node_top = _("You are already at the first page of this node.");
msg_one_window = _("Only one window.");
msg_win_too_small = _("Resulting window would be too small.");
msg_cant_make_help = _("Not enough room for a help window, please delete a window.");
}
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