330 lines
8.2 KiB
C
330 lines
8.2 KiB
C
/* nodemenu.c -- Produce a menu of all visited nodes. */
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/* This file is part of GNU Info, a program for reading online documentation
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stored in Info format.
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Copyright (C) 1993 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Written by Brian Fox (bfox@ai.mit.edu). */
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#include "info.h"
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/* Return a line describing the format of a node information line. */
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static char *
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nodemenu_format_info ()
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{
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return ("\n\
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* Menu:\n\
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(File)Node Lines Size Containing File\n\
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---------- ----- ---- ---------------");
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}
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/* Produce a formatted line of information about NODE. Here is what we want
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the output listing to look like:
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* Menu:
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(File)Node Lines Size Containing File
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---------- ----- ---- ---------------
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* (emacs)Buffers:: 48 2230 /usr/gnu/info/emacs/emacs-1
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* (autoconf)Writing configure.in:: 123 58789 /usr/gnu/info/autoconf/autoconf-1
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* (dir)Top:: 40 589 /usr/gnu/info/dir
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*/
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static char *
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format_node_info (node)
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NODE *node;
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{
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register int i, len;
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char *parent, *containing_file;
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static char *line_buffer = (char *)NULL;
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if (!line_buffer)
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line_buffer = (char *)xmalloc (1000);
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if (node->parent)
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{
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parent = filename_non_directory (node->parent);
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if (!parent)
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parent = node->parent;
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}
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else
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parent = (char *)NULL;
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containing_file = node->filename;
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if (!parent && !*containing_file)
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sprintf (line_buffer, "* %s::", node->nodename);
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else
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{
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char *file = (char *)NULL;
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if (parent)
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file = parent;
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else
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file = filename_non_directory (containing_file);
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if (!file)
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file = containing_file;
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if (!*file)
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file = "dir";
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sprintf (line_buffer, "* (%s)%s::", file, node->nodename);
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}
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len = pad_to (36, line_buffer);
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{
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int lines = 1;
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for (i = 0; i < node->nodelen; i++)
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if (node->contents[i] == '\n')
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lines++;
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sprintf (line_buffer + len, "%d", lines);
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}
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len = pad_to (44, line_buffer);
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sprintf (line_buffer + len, "%d", node->nodelen);
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if (node->filename && *(node->filename))
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{
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len = pad_to (51, line_buffer);
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sprintf (line_buffer + len, node->filename);
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}
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return (strdup (line_buffer));
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}
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/* Little string comparison routine for qsort (). */
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static int
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compare_strings (string1, string2)
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char **string1, **string2;
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{
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return (strcasecmp (*string1, *string2));
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}
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/* The name of the nodemenu node. */
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static char *nodemenu_nodename = "*Node Menu*";
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/* Produce an informative listing of all the visited nodes, and return it
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in a node. If FILTER_FUNC is non-null, it is a function which filters
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which nodes will appear in the listing. FILTER_FUNC takes an argument
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of NODE, and returns non-zero if the node should appear in the listing. */
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NODE *
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get_visited_nodes (filter_func)
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Function *filter_func;
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{
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register int i, iw_index;
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INFO_WINDOW *info_win;
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NODE *node;
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char **lines = (char **)NULL;
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int lines_index = 0, lines_slots = 0;
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if (!info_windows)
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return ((NODE *)NULL);
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for (iw_index = 0; info_win = info_windows[iw_index]; iw_index++)
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{
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for (i = 0; i < info_win->nodes_index; i++)
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{
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node = info_win->nodes[i];
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/* We skip mentioning "*Node Menu*" nodes. */
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if (internal_info_node_p (node) &&
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(strcmp (node->nodename, nodemenu_nodename) == 0))
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continue;
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if (node && (!filter_func || (*filter_func) (node)))
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{
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char *line;
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line = format_node_info (node);
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add_pointer_to_array
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(line, lines_index, lines, lines_slots, 20, char *);
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}
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}
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}
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/* Sort the array of information lines, if there are any. */
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if (lines)
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{
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register int j, newlen;
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char **temp;
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qsort (lines, lines_index, sizeof (char *), compare_strings);
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/* Delete duplicates. */
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for (i = 0, newlen = 1; i < lines_index - 1; i++)
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{
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if (strcmp (lines[i], lines[i + 1]) == 0)
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{
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free (lines[i]);
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lines[i] = (char *)NULL;
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}
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else
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newlen++;
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}
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/* We have free ()'d and marked all of the duplicate slots.
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Copy the live slots rather than pruning the dead slots. */
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temp = (char **)xmalloc ((1 + newlen) * sizeof (char *));
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for (i = 0, j = 0; i < lines_index; i++)
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if (lines[i])
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temp[j++] = lines[i];
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temp[j] = (char *)NULL;
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free (lines);
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lines = temp;
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lines_index = newlen;
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}
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initialize_message_buffer ();
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printf_to_message_buffer
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("%s", replace_in_documentation
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("Here is the menu of nodes you have recently visited.\n\
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Select one from this menu, or use `\\[history-node]' in another window.\n"));
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printf_to_message_buffer ("%s\n", nodemenu_format_info ());
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for (i = 0; (lines != (char **)NULL) && (i < lines_index); i++)
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{
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printf_to_message_buffer ("%s\n", lines[i]);
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free (lines[i]);
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}
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if (lines)
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free (lines);
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node = message_buffer_to_node ();
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add_gcable_pointer (node->contents);
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return (node);
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}
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DECLARE_INFO_COMMAND (list_visited_nodes,
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"Make a window containing a menu of all of the currently visited nodes")
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{
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WINDOW *new;
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NODE *node;
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set_remembered_pagetop_and_point (window);
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/* If a window is visible and showing the buffer list already, re-use it. */
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for (new = windows; new; new = new->next)
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{
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node = new->node;
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if (internal_info_node_p (node) &&
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(strcmp (node->nodename, nodemenu_nodename) == 0))
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break;
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}
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/* If we couldn't find an existing window, try to use the next window
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in the chain. */
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if (!new && window->next)
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new = window->next;
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/* If we still don't have a window, make a new one to contain the list. */
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if (!new)
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{
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WINDOW *old_active;
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old_active = active_window;
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active_window = window;
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new = window_make_window ((NODE *)NULL);
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active_window = old_active;
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}
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/* If we couldn't make a new window, use this one. */
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if (!new)
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new = window;
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/* Lines do not wrap in this window. */
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new->flags |= W_NoWrap;
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node = get_visited_nodes ((Function *)NULL);
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name_internal_node (node, nodemenu_nodename);
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/* Even if this is an internal node, we don't want the window
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system to treat it specially. So we turn off the internalness
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of it here. */
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node->flags &= ~N_IsInternal;
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/* If this window is already showing a node menu, reuse the existing node
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slot. */
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{
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int remember_me = 1;
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#if defined (NOTDEF)
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if (internal_info_node_p (new->node) &&
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(strcmp (new->node->nodename, nodemenu_nodename) == 0))
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remember_me = 0;
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#endif /* NOTDEF */
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window_set_node_of_window (new, node);
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if (remember_me)
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remember_window_and_node (new, node);
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}
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active_window = new;
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}
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DECLARE_INFO_COMMAND (select_visited_node,
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"Select a node which has been previously visited in a visible window")
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{
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char *line;
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NODE *node;
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REFERENCE **menu;
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node = get_visited_nodes ((Function *)NULL);
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menu = info_menu_of_node (node);
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free (node);
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line =
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info_read_completing_in_echo_area (window, "Select visited node: ", menu);
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window = active_window;
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/* User aborts, just quit. */
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if (!line)
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{
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info_abort_key (window, 0, 0);
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info_free_references (menu);
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return;
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}
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if (*line)
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{
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REFERENCE *entry;
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/* Find the selected label in the references. */
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entry = info_get_labeled_reference (line, menu);
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if (!entry)
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info_error ("The reference disappeared! (%s).", line);
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else
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info_select_reference (window, entry);
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}
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free (line);
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info_free_references (menu);
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if (!info_error_was_printed)
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window_clear_echo_area ();
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}
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