diff options
Diffstat (limited to 'texinfo/info/m-x.c')
| -rw-r--r-- | texinfo/info/m-x.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/texinfo/info/m-x.c b/texinfo/info/m-x.c new file mode 100644 index 0000000..03ac1a5 --- /dev/null +++ b/texinfo/info/m-x.c @@ -0,0 +1,195 @@ +/* m-x.c -- Meta-X minibuffer reader. */ + +/* 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" + +/* **************************************************************** */ +/* */ +/* Reading Named Commands */ +/* */ +/* **************************************************************** */ + +/* Read the name of an Info function in the echo area and return the + name. A return value of NULL indicates that no function name could + be read. */ +char * +read_function_name (prompt, window) + char *prompt; + WINDOW *window; +{ + register int i; + char *line; + REFERENCE **array = (REFERENCE **)NULL; + int array_index = 0, array_slots = 0; + + /* Make an array of REFERENCE which actually contains the names of + the functions available in Info. */ + for (i = 0; function_doc_array[i].func; i++) + { + REFERENCE *entry; + + entry = (REFERENCE *)xmalloc (sizeof (REFERENCE)); + entry->label = strdup (function_doc_array[i].func_name); + entry->nodename = (char *)NULL; + entry->filename = (char *)NULL; + + add_pointer_to_array + (entry, array_index, array, array_slots, 200, REFERENCE *); + } + + line = info_read_completing_in_echo_area (window, prompt, array); + + info_free_references (array); + + if (!echo_area_is_active) + window_clear_echo_area (); + + return (line); +} + +DECLARE_INFO_COMMAND (describe_command, + "Read the name of an Info command and describe it") +{ + char *line; + + line = read_function_name ("Describe command: ", window); + + if (!line) + { + info_abort_key (active_window, count, key); + return; + } + + /* Describe the function named in "LINE". */ + if (*line) + { + char *fundoc; + VFunction *fun; + + fun = named_function (line); + + if (!fun) + return; + + window_message_in_echo_area ("%s: %s.", + line, function_documentation (fun)); + } + free (line); +} + +DECLARE_INFO_COMMAND (info_execute_command, + "Read a command name in the echo area and execute it") +{ + char *line; + + /* Ask the completer to read a reference for us. */ + if (info_explicit_arg || count != 1) + { + char *prompt; + + prompt = (char *)xmalloc (20); + sprintf (prompt, "%d M-x ", count); + line = read_function_name (prompt, window); + } + else + line = read_function_name ("M-x ", window); + + /* User aborted? */ + if (!line) + { + info_abort_key (active_window, count, key); + return; + } + + /* User accepted "default"? (There is none.) */ + if (!*line) + { + free (line); + return; + } + + /* User wants to execute a named command. Do it. */ + { + VFunction *function; + + if ((active_window != the_echo_area) && + (strncmp (line, "echo-area-", 10) == 0)) + { + free (line); + info_error ("Cannot execute an `echo-area' command here."); + return; + } + + function = named_function (line); + free (line); + + if (!function) + return; + + (*function) (active_window, count, 0); + } +} + +/* Okay, now that we have M-x, let the user set the screen height. */ +DECLARE_INFO_COMMAND (set_screen_height, + "Set the height of the displayed window") +{ + int new_height; + + if (info_explicit_arg || count != 1) + new_height = count; + else + { + char prompt[80]; + char *line; + + new_height = screenheight; + + sprintf (prompt, "Set screen height to (%d): ", new_height); + + line = info_read_in_echo_area (window, prompt); + + /* If the user aborted, do that now. */ + if (!line) + { + info_abort_key (active_window, count, 0); + return; + } + + /* Find out what the new height is supposed to be. */ + if (*line) + new_height = atoi (line); + + /* Clear the echo area if it isn't active. */ + if (!echo_area_is_active) + window_clear_echo_area (); + + free (line); + } + + terminal_clear_screen (); + display_clear_display (the_display); + screenheight = new_height; + display_initialize_display (screenwidth, screenheight); + window_new_screen_size (screenwidth, screenheight); +} |