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Diffstat (limited to 'contrib/texinfo/info/infodoc.c')
| -rw-r--r-- | contrib/texinfo/info/infodoc.c | 771 |
1 files changed, 0 insertions, 771 deletions
diff --git a/contrib/texinfo/info/infodoc.c b/contrib/texinfo/info/infodoc.c deleted file mode 100644 index 35675095e70c..000000000000 --- a/contrib/texinfo/info/infodoc.c +++ /dev/null @@ -1,771 +0,0 @@ -/* infodoc.c -- Functions which build documentation nodes. */ - -/* This file is part of GNU Info, a program for reading online documentation - stored in Info format. - - Copyright (C) 1993 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" - -/* Normally we do not define HELP_NODE_GETS_REGENERATED because the - contents of the help node currently can never change once an info - session has been started. You should consider defining this in - the case that you place information about dynamic variables in the - help text. When that happens, the contents of the help node will - change dependent on the value of those variables, and the user will - expect to see those changes. */ -/* #define HELP_NODE_GETS_REGENERATED 1 */ - -/* **************************************************************** */ -/* */ -/* Info Help Windows */ -/* */ -/* **************************************************************** */ - -/* The name of the node used in the help window. */ -static char *info_help_nodename = "*Info Help*"; - -/* A node containing printed key bindings and their documentation. */ -static NODE *internal_info_help_node = (NODE *)NULL; - -/* A pointer to the contents of the help node. */ -static char *internal_info_help_node_contents = (char *)NULL; - -/* The static text which appears in the internal info help node. */ -static char *info_internal_help_text[] = { - "Basic Commands in Info Windows", - "******************************", - "", - " h Invoke the Info tutorial.", - "", - "Selecting other nodes:", - "----------------------", - " n Move to the \"next\" node of this node.", - " p Move to the \"previous\" node of this node.", - " u Move \"up\" from this node.", - " m Pick menu item specified by name.", - " Picking a menu item causes another node to be selected.", - " f Follow a cross reference. Reads name of reference.", - " l Move to the last node seen in this window.", - " d Move to the `directory' node. Equivalent to `g(DIR)'.", - "", - "Moving within a node:", - "---------------------", - " SPC Scroll forward a page.", - " DEL Scroll backward a page.", - " b Go to the beginning of this node.", - " e Go to the end of this node.", - "", - "\"Advanced\" commands:", - "--------------------", - " q Quit Info.", - " 1 Pick first item in node's menu.", - " 2-9 Pick second ... ninth item in node's menu.", - " 0 Pick last item in node's menu.", - " g Move to node specified by name.", - " You may include a filename as well, as in (FILENAME)NODENAME.", - " s Search through this Info file for a specified string,", - " and select the node in which the next occurrence is found.", - (char *)NULL -}; - -static char *where_is (), *where_is_internal (); - -void -dump_map_to_message_buffer (prefix, map) - char *prefix; - Keymap map; -{ - register int i; - - for (i = 0; i < 256; i++) - { - if (map[i].type == ISKMAP) - { - char *new_prefix, *keyname; - - keyname = pretty_keyname (i); - new_prefix = (char *) - xmalloc (3 + strlen (prefix) + strlen (keyname)); - sprintf (new_prefix, "%s%s%s ", prefix, *prefix ? " " : "", keyname); - - dump_map_to_message_buffer (new_prefix, (Keymap)map[i].function); - free (new_prefix); - } - else if (map[i].function) - { - register int last; - char *doc, *name; - - doc = function_documentation (map[i].function); - name = function_name (map[i].function); - - if (!*doc) - continue; - - /* Find out if there is a series of identical functions, as in - ea_insert (). */ - for (last = i + 1; last < 256; last++) - if ((map[last].type != ISFUNC) || - (map[last].function != map[i].function)) - break; - - if (last - 1 != i) - { - printf_to_message_buffer - ("%s%s .. ", prefix, pretty_keyname (i)); - printf_to_message_buffer - ("%s%s\t", prefix, pretty_keyname (last - 1)); - i = last - 1; - } - else - printf_to_message_buffer ("%s%s\t", prefix, pretty_keyname (i)); - -#if defined (NAMED_FUNCTIONS) - /* Print the name of the function, and some padding before the - documentation string is printed. */ - { - int length_so_far; - int desired_doc_start = 40; /* Must be multiple of 8. */ - - printf_to_message_buffer ("(%s)", name); - length_so_far = message_buffer_length_this_line (); - - if ((desired_doc_start + strlen (doc)) >= the_screen->width) - printf_to_message_buffer ("\n "); - else - { - while (length_so_far < desired_doc_start) - { - printf_to_message_buffer ("\t"); - length_so_far += character_width ('\t', length_so_far); - } - } - } -#endif /* NAMED_FUNCTIONS */ - printf_to_message_buffer ("%s\n", doc); - } - } -} - -/* How to create internal_info_help_node. */ -static void -create_internal_info_help_node () -{ - register int i; - char *contents = (char *)NULL; - NODE *node; - -#if !defined (HELP_NODE_GETS_REGENERATED) - if (internal_info_help_node_contents) - contents = internal_info_help_node_contents; -#endif /* !HELP_NODE_GETS_REGENERATED */ - - if (!contents) - { - int printed_one_mx = 0; - - initialize_message_buffer (); - - for (i = 0; info_internal_help_text[i]; i++) - printf_to_message_buffer ("%s\n", info_internal_help_text[i]); - - printf_to_message_buffer ("---------------------\n\n"); - printf_to_message_buffer ("The current search path is:\n"); - printf_to_message_buffer (" \"%s\"\n", infopath); - printf_to_message_buffer ("---------------------\n\n"); - printf_to_message_buffer ("Commands available in Info windows:\n\n"); - dump_map_to_message_buffer ("", info_keymap); - printf_to_message_buffer ("---------------------\n\n"); - printf_to_message_buffer ("Commands available in the echo area:\n\n"); - dump_map_to_message_buffer ("", echo_area_keymap); - -#if defined (NAMED_FUNCTIONS) - /* Get a list of the M-x commands which have no keystroke equivs. */ - for (i = 0; function_doc_array[i].func; i++) - { - VFunction *func = function_doc_array[i].func; - - if ((!where_is_internal (info_keymap, func)) && - (!where_is_internal (echo_area_keymap, func))) - { - if (!printed_one_mx) - { - printf_to_message_buffer ("---------------------\n\n"); - printf_to_message_buffer - ("The following commands can only be invoked via M-x:\n\n"); - printed_one_mx = 1; - } - - printf_to_message_buffer - ("M-x %s\n %s\n", - function_doc_array[i].func_name, - replace_in_documentation (function_doc_array[i].doc)); - } - } - - if (printed_one_mx) - printf_to_message_buffer ("\n"); -#endif /* NAMED_FUNCTIONS */ - - printf_to_message_buffer - ("%s", replace_in_documentation - ("--- Use `\\[history-node]' or `\\[kill-node]' to exit ---\n")); - node = message_buffer_to_node (); - internal_info_help_node_contents = node->contents; - } - else - { - /* We already had the right contents, so simply use them. */ - node = build_message_node ("", 0, 0); - free (node->contents); - node->contents = contents; - node->nodelen = 1 + strlen (contents); - } - - internal_info_help_node = node; - - /* Do not GC this node's contents. It never changes, and we never need - to delete it once it is made. If you change some things (such as - placing information about dynamic variables in the help text) then - you will need to allow the contents to be gc'd, and you will have to - arrange to always regenerate the help node. */ -#if defined (HELP_NODE_GETS_REGENERATED) - add_gcable_pointer (internal_info_help_node->contents); -#endif - - name_internal_node (internal_info_help_node, info_help_nodename); - - /* Even though this is an internal node, we don't want the window - system to treat it specially. So we turn off the internalness - of it here. */ - internal_info_help_node->flags &= ~N_IsInternal; -} - -/* Return a window which is the window showing help in this Info. */ -static WINDOW * -info_find_or_create_help_window () -{ - WINDOW *help_window, *eligible, *window; - - eligible = (WINDOW *)NULL; - help_window = get_internal_info_window (info_help_nodename); - - /* If we couldn't find the help window, then make it. */ - if (!help_window) - { - int max = 0; - - for (window = windows; window; window = window->next) - { - if (window->height > max) - { - max = window->height; - eligible = window; - } - } - - if (!eligible) - return ((WINDOW *)NULL); - } -#if !defined (HELP_NODE_GETS_REGENERATED) - else - return (help_window); -#endif /* !HELP_NODE_GETS_REGENERATED */ - - /* Make sure that we have a node containing the help text. */ - create_internal_info_help_node (); - - /* Either use the existing window to display the help node, or create - a new window if there was no existing help window. */ - if (!help_window) - { - /* Split the largest window into 2 windows, and show the help text - in that window. */ - if (eligible->height > 30) - { - active_window = eligible; - help_window = window_make_window (internal_info_help_node); - } - else - { - set_remembered_pagetop_and_point (active_window); - window_set_node_of_window (active_window, internal_info_help_node); - help_window = active_window; - } - } - else - { - /* Case where help node always gets regenerated, and we have an - existing window in which to place the node. */ - if (active_window != help_window) - { - set_remembered_pagetop_and_point (active_window); - active_window = help_window; - } - window_set_node_of_window (active_window, internal_info_help_node); - } - remember_window_and_node (help_window, help_window->node); - return (help_window); -} - -/* Create or move to the help window. */ -DECLARE_INFO_COMMAND (info_get_help_window, "Display help message") -{ - WINDOW *help_window; - - help_window = info_find_or_create_help_window (); - if (help_window) - { - active_window = help_window; - active_window->flags |= W_UpdateWindow; - } - else - { - info_error (CANT_MAKE_HELP); - } -} - -/* Show the Info help node. This means that the "info" file is installed - where it can easily be found on your system. */ -DECLARE_INFO_COMMAND (info_get_info_help_node, "Visit Info node `(info)Help'") -{ - NODE *node; - char *nodename; - - /* If there is a window on the screen showing the node "(info)Help" or - the node "(info)Help-Small-Screen", simply select that window. */ - { - WINDOW *win; - - for (win = windows; win; win = win->next) - { - if (win->node && win->node->filename && - (strcasecmp - (filename_non_directory (win->node->filename), "info") == 0) && - ((strcmp (win->node->nodename, "Help") == 0) || - (strcmp (win->node->nodename, "Help-Small-Screen") == 0))) - { - active_window = win; - return; - } - } - } - - /* If the current window is small, show the small screen help. */ - if (active_window->height < 24) - nodename = "Help-Small-Screen"; - else - nodename = "Help"; - - /* Try to get the info file for Info. */ - node = info_get_node ("Info", nodename); - - if (!node) - { - if (info_recent_file_error) - info_error (info_recent_file_error); - else - info_error (CANT_FILE_NODE, "Info", nodename); - } - else - { - /* If the current window is very large (greater than 45 lines), - then split it and show the help node in another window. - Otherwise, use the current window. */ - - if (active_window->height > 45) - active_window = window_make_window (node); - else - { - set_remembered_pagetop_and_point (active_window); - window_set_node_of_window (active_window, node); - } - - remember_window_and_node (active_window, node); - } -} - -/* **************************************************************** */ -/* */ -/* Groveling Info Keymaps and Docs */ -/* */ -/* **************************************************************** */ - -/* Return the documentation associated with the Info command FUNCTION. */ -char * -function_documentation (function) - VFunction *function; -{ - register int i; - - for (i = 0; function_doc_array[i].func; i++) - if (function == function_doc_array[i].func) - break; - - return (replace_in_documentation (function_doc_array[i].doc)); -} - -#if defined (NAMED_FUNCTIONS) -/* Return the user-visible name of the function associated with the - Info command FUNCTION. */ -char * -function_name (function) - - VFunction *function; -{ - register int i; - - for (i = 0; function_doc_array[i].func; i++) - if (function == function_doc_array[i].func) - break; - - return (function_doc_array[i].func_name); -} - -/* Return a pointer to the function named NAME. */ -VFunction * -named_function (name) - char *name; -{ - register int i; - - for (i = 0; function_doc_array[i].func; i++) - if (strcmp (function_doc_array[i].func_name, name) == 0) - break; - - return (function_doc_array[i].func); -} -#endif /* NAMED_FUNCTIONS */ - -/* Return the documentation associated with KEY in MAP. */ -char * -key_documentation (key, map) - char key; - Keymap map; -{ - VFunction *function = map[key].function; - - if (function) - return (function_documentation (function)); - else - return ((char *)NULL); -} - -DECLARE_INFO_COMMAND (describe_key, "Print documentation for KEY") -{ - char keyname[50]; - int keyname_index = 0; - unsigned char keystroke; - char *rep; - Keymap map; - - keyname[0] = '\0'; - map = window->keymap; - - while (1) - { - message_in_echo_area ("Describe key: %s", keyname); - keystroke = info_get_input_char (); - unmessage_in_echo_area (); - - if (Meta_p (keystroke) && (!ISO_Latin_p || key < 160)) - { - if (map[ESC].type != ISKMAP) - { - window_message_in_echo_area - ("ESC %s is undefined.", pretty_keyname (UnMeta (keystroke))); - return; - } - - strcpy (keyname + keyname_index, "ESC "); - keyname_index = strlen (keyname); - keystroke = UnMeta (keystroke); - map = (Keymap)map[ESC].function; - } - - /* Add the printed representation of KEYSTROKE to our keyname. */ - rep = pretty_keyname (keystroke); - strcpy (keyname + keyname_index, rep); - keyname_index = strlen (keyname); - - if (map[keystroke].function == (VFunction *)NULL) - { - message_in_echo_area ("%s is undefined.", keyname); - return; - } - else if (map[keystroke].type == ISKMAP) - { - map = (Keymap)map[keystroke].function; - strcat (keyname, " "); - keyname_index = strlen (keyname); - continue; - } - else - { - char *message, *fundoc, *funname = ""; - -#if defined (NAMED_FUNCTIONS) - funname = function_name (map[keystroke].function); -#endif /* NAMED_FUNCTIONS */ - - fundoc = function_documentation (map[keystroke].function); - - message = (char *)xmalloc - (10 + strlen (keyname) + strlen (fundoc) + strlen (funname)); - -#if defined (NAMED_FUNCTIONS) - sprintf (message, "%s (%s): %s.", keyname, funname, fundoc); -#else - sprintf (message, "%s is defined to %s.", keyname, fundoc); -#endif /* !NAMED_FUNCTIONS */ - - window_message_in_echo_area ("%s", message); - free (message); - break; - } - } -} - -/* How to get the pretty printable name of a character. */ -static char rep_buffer[30]; - -char * -pretty_keyname (key) - unsigned char key; -{ - char *rep; - - if (Meta_p (key)) - { - char temp[20]; - - rep = pretty_keyname (UnMeta (key)); - - sprintf (temp, "ESC %s", rep); - strcpy (rep_buffer, temp); - rep = rep_buffer; - } - else if (Control_p (key)) - { - switch (key) - { - case '\n': rep = "LFD"; break; - case '\t': rep = "TAB"; break; - case '\r': rep = "RET"; break; - case ESC: rep = "ESC"; break; - - default: - sprintf (rep_buffer, "C-%c", UnControl (key)); - rep = rep_buffer; - } - } - else - { - switch (key) - { - case ' ': rep = "SPC"; break; - case DEL: rep = "DEL"; break; - default: - rep_buffer[0] = key; - rep_buffer[1] = '\0'; - rep = rep_buffer; - } - } - return (rep); -} - -/* Replace the names of functions with the key that invokes them. */ -char * -replace_in_documentation (string) - char *string; -{ - register int i, start, next; - static char *result = (char *)NULL; - - maybe_free (result); - result = (char *)xmalloc (1 + strlen (string)); - - i = next = start = 0; - - /* Skip to the beginning of a replaceable function. */ - for (i = start; string[i]; i++) - { - /* Is this the start of a replaceable function name? */ - if (string[i] == '\\' && string[i + 1] == '[') - { - char *fun_name, *rep; - VFunction *function; - - /* Copy in the old text. */ - strncpy (result + next, string + start, i - start); - next += (i - start); - start = i + 2; - - /* Move to the end of the function name. */ - for (i = start; string[i] && (string[i] != ']'); i++); - - fun_name = (char *)xmalloc (1 + i - start); - strncpy (fun_name, string + start, i - start); - fun_name[i - start] = '\0'; - - /* Find a key which invokes this function in the info_keymap. */ - function = named_function (fun_name); - - /* If the internal documentation string fails, there is a - serious problem with the associated command's documentation. - We croak so that it can be fixed immediately. */ - if (!function) - abort (); - - rep = where_is (info_keymap, function); - strcpy (result + next, rep); - next = strlen (result); - - start = i; - if (string[i]) - start++; - } - } - strcpy (result + next, string + start); - return (result); -} - -/* Return a string of characters which could be typed from the keymap - MAP to invoke FUNCTION. */ -static char *where_is_rep = (char *)NULL; -static int where_is_rep_index = 0; -static int where_is_rep_size = 0; - -static char * -where_is (map, function) - Keymap map; - VFunction *function; -{ - char *rep; - - if (!where_is_rep_size) - where_is_rep = (char *)xmalloc (where_is_rep_size = 100); - where_is_rep_index = 0; - - rep = where_is_internal (map, function); - - /* If it couldn't be found, return "M-x Foo". */ - if (!rep) - { - char *name; - - name = function_name (function); - - if (name) - sprintf (where_is_rep, "M-x %s", name); - - rep = where_is_rep; - } - return (rep); -} - -/* Return the printed rep of FUNCTION as found in MAP, or NULL. */ -static char * -where_is_internal (map, function) - Keymap map; - VFunction *function; -{ - register int i; - - /* If the function is directly invokable in MAP, return the representation - of that keystroke. */ - for (i = 0; i < 256; i++) - if ((map[i].type == ISFUNC) && map[i].function == function) - { - sprintf (where_is_rep + where_is_rep_index, "%s", pretty_keyname (i)); - return (where_is_rep); - } - - /* Okay, search subsequent maps for this function. */ - for (i = 0; i < 256; i++) - { - if (map[i].type == ISKMAP) - { - int saved_index = where_is_rep_index; - char *rep; - - sprintf (where_is_rep + where_is_rep_index, "%s ", - pretty_keyname (i)); - - where_is_rep_index = strlen (where_is_rep); - rep = where_is_internal ((Keymap)map[i].function, function); - - if (rep) - return (where_is_rep); - - where_is_rep_index = saved_index; - } - } - - return ((char *)NULL); -} - -extern char *read_function_name (); - -DECLARE_INFO_COMMAND (info_where_is, - "Show what to type to execute a given command") -{ - char *command_name; - - command_name = read_function_name ("Where is command: ", window); - - if (!command_name) - { - info_abort_key (active_window, count, key); - return; - } - - if (*command_name) - { - VFunction *function; - - function = named_function (command_name); - - if (function) - { - char *location; - - location = where_is (active_window->keymap, function); - - if (!location) - { - info_error ("`%s' is not on any keys", command_name); - } - else - { - if (strncmp (location, "M-x ", 4) == 0) - window_message_in_echo_area - ("%s can only be invoked via %s.", command_name, location); - else - window_message_in_echo_area - ("%s can be invoked via %s.", command_name, location); - } - } - else - info_error ("There is no function named `%s'", command_name); - } - - free (command_name); -} |