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Diffstat (limited to 'info/m-x.c')
| -rw-r--r-- | info/m-x.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/info/m-x.c b/info/m-x.c new file mode 100644 index 0000000..a66f3ed --- /dev/null +++ b/info/m-x.c @@ -0,0 +1,213 @@ +/* m-x.c -- Meta-x minibuffer reader. + $Id: m-x.c,v 1.8 2008/06/11 09:55:42 gray Exp $ + + Copyright (C) 1993, 1997, 1998, 2001, 2002, 2004, 2007, 2008 + 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. + + Originally written by Brian Fox (bfox@ai.mit.edu). */ + +#include "info.h" +#include "funs.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 (const char *prompt, WINDOW *window) +{ + register int i; + char *line; + REFERENCE **array = 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 = xmalloc (sizeof (REFERENCE)); + entry->label = xstrdup (function_doc_array[i].func_name); + entry->nodename = NULL; + entry->filename = 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) + { + InfoCommand *cmd = named_function (line); + + if (!cmd) + return; + + window_message_in_echo_area ("%s: %s.", + line, function_documentation (cmd)); + } + free (line); +} + +DECLARE_INFO_COMMAND (info_execute_command, + _("Read a command name in the echo area and execute it")) +{ + char *line; + char *keys; + char *prompt; + + prompt = xmalloc (20); + + keys = where_is (info_keymap, InfoCmd(info_execute_command)); + /* If the where_is () function thinks that this command doesn't exist, + there's something very wrong! */ + if (!keys) + abort(); + + if (info_explicit_arg || count != 1) + sprintf (prompt, "%d %s ", count, keys); + else + sprintf (prompt, "%s ", keys); + + /* Ask the completer to read a reference for us. */ + line = read_function_name (prompt, 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. */ + { + InfoCommand *command; + + if ((active_window != the_echo_area) && + (strncmp (line, "echo-area-", 10) == 0)) + { + free (line); + info_error (_("Cannot execute an `echo-area' command here."), + NULL, NULL); + return; + } + + command = named_function (line); + free (line); + + if (!command) + return; + + if (InfoFunction(command)) + (*InfoFunction(command)) (active_window, count, 0); + else + info_error (_("Undefined command: %s"), line, NULL); + } +} + +/* 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, old_height = screenheight; + + 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; +#ifdef SET_SCREEN_SIZE_HELPER + SET_SCREEN_SIZE_HELPER; +#endif + if (screenheight == old_height) + { + /* Display dimensions didn't actually change, so + window_new_screen_size won't do anything, but we've + already cleared the display above. Undo the damage. */ + window_mark_chain (windows, W_UpdateWindow); + display_update_display (windows); + } + else + { + display_initialize_display (screenwidth, screenheight); + window_new_screen_size (screenwidth, screenheight); + } +} |