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-rw-r--r--texinfo/info/nodemenu.c329
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diff --git a/texinfo/info/nodemenu.c b/texinfo/info/nodemenu.c
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+/* nodemenu.c -- Produce a menu of all visited 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"
+
+/* Return a line describing the format of a node information line. */
+static char *
+nodemenu_format_info ()
+{
+ return ("\n\
+* Menu:\n\
+ (File)Node Lines Size Containing File\n\
+ ---------- ----- ---- ---------------");
+}
+
+/* Produce a formatted line of information about NODE. Here is what we want
+ the output listing to look like:
+
+* Menu:
+ (File)Node Lines Size Containing File
+ ---------- ----- ---- ---------------
+* (emacs)Buffers:: 48 2230 /usr/gnu/info/emacs/emacs-1
+* (autoconf)Writing configure.in:: 123 58789 /usr/gnu/info/autoconf/autoconf-1
+* (dir)Top:: 40 589 /usr/gnu/info/dir
+*/
+static char *
+format_node_info (node)
+ NODE *node;
+{
+ register int i, len;
+ char *parent, *containing_file;
+ static char *line_buffer = (char *)NULL;
+
+ if (!line_buffer)
+ line_buffer = (char *)xmalloc (1000);
+
+ if (node->parent)
+ {
+ parent = filename_non_directory (node->parent);
+ if (!parent)
+ parent = node->parent;
+ }
+ else
+ parent = (char *)NULL;
+
+ containing_file = node->filename;
+
+ if (!parent && !*containing_file)
+ sprintf (line_buffer, "* %s::", node->nodename);
+ else
+ {
+ char *file = (char *)NULL;
+
+ if (parent)
+ file = parent;
+ else
+ file = filename_non_directory (containing_file);
+
+ if (!file)
+ file = containing_file;
+
+ if (!*file)
+ file = "dir";
+
+ sprintf (line_buffer, "* (%s)%s::", file, node->nodename);
+ }
+
+ len = pad_to (36, line_buffer);
+
+ {
+ int lines = 1;
+
+ for (i = 0; i < node->nodelen; i++)
+ if (node->contents[i] == '\n')
+ lines++;
+
+ sprintf (line_buffer + len, "%d", lines);
+ }
+
+ len = pad_to (44, line_buffer);
+ sprintf (line_buffer + len, "%d", node->nodelen);
+
+ if (node->filename && *(node->filename))
+ {
+ len = pad_to (51, line_buffer);
+ sprintf (line_buffer + len, node->filename);
+ }
+
+ return (strdup (line_buffer));
+}
+
+/* Little string comparison routine for qsort (). */
+static int
+compare_strings (string1, string2)
+ char **string1, **string2;
+{
+ return (strcasecmp (*string1, *string2));
+}
+
+/* The name of the nodemenu node. */
+static char *nodemenu_nodename = "*Node Menu*";
+
+/* Produce an informative listing of all the visited nodes, and return it
+ in a node. If FILTER_FUNC is non-null, it is a function which filters
+ which nodes will appear in the listing. FILTER_FUNC takes an argument
+ of NODE, and returns non-zero if the node should appear in the listing. */
+NODE *
+get_visited_nodes (filter_func)
+ Function *filter_func;
+{
+ register int i, iw_index;
+ INFO_WINDOW *info_win;
+ NODE *node;
+ char **lines = (char **)NULL;
+ int lines_index = 0, lines_slots = 0;
+
+ if (!info_windows)
+ return ((NODE *)NULL);
+
+ for (iw_index = 0; info_win = info_windows[iw_index]; iw_index++)
+ {
+ for (i = 0; i < info_win->nodes_index; i++)
+ {
+ node = info_win->nodes[i];
+
+ /* We skip mentioning "*Node Menu*" nodes. */
+ if (internal_info_node_p (node) &&
+ (strcmp (node->nodename, nodemenu_nodename) == 0))
+ continue;
+
+ if (node && (!filter_func || (*filter_func) (node)))
+ {
+ char *line;
+
+ line = format_node_info (node);
+ add_pointer_to_array
+ (line, lines_index, lines, lines_slots, 20, char *);
+ }
+ }
+ }
+
+ /* Sort the array of information lines, if there are any. */
+ if (lines)
+ {
+ register int j, newlen;
+ char **temp;
+
+ qsort (lines, lines_index, sizeof (char *), compare_strings);
+
+ /* Delete duplicates. */
+ for (i = 0, newlen = 1; i < lines_index - 1; i++)
+ {
+ if (strcmp (lines[i], lines[i + 1]) == 0)
+ {
+ free (lines[i]);
+ lines[i] = (char *)NULL;
+ }
+ else
+ newlen++;
+ }
+
+ /* We have free ()'d and marked all of the duplicate slots.
+ Copy the live slots rather than pruning the dead slots. */
+ temp = (char **)xmalloc ((1 + newlen) * sizeof (char *));
+ for (i = 0, j = 0; i < lines_index; i++)
+ if (lines[i])
+ temp[j++] = lines[i];
+
+ temp[j] = (char *)NULL;
+ free (lines);
+ lines = temp;
+ lines_index = newlen;
+ }
+
+ initialize_message_buffer ();
+
+ printf_to_message_buffer
+ ("%s", replace_in_documentation
+ ("Here is the menu of nodes you have recently visited.\n\
+Select one from this menu, or use `\\[history-node]' in another window.\n"));
+
+ printf_to_message_buffer ("%s\n", nodemenu_format_info ());
+
+ for (i = 0; (lines != (char **)NULL) && (i < lines_index); i++)
+ {
+ printf_to_message_buffer ("%s\n", lines[i]);
+ free (lines[i]);
+ }
+
+ if (lines)
+ free (lines);
+
+ node = message_buffer_to_node ();
+ add_gcable_pointer (node->contents);
+ return (node);
+}
+
+DECLARE_INFO_COMMAND (list_visited_nodes,
+ "Make a window containing a menu of all of the currently visited nodes")
+{
+ WINDOW *new;
+ NODE *node;
+
+ set_remembered_pagetop_and_point (window);
+
+ /* If a window is visible and showing the buffer list already, re-use it. */
+ for (new = windows; new; new = new->next)
+ {
+ node = new->node;
+
+ if (internal_info_node_p (node) &&
+ (strcmp (node->nodename, nodemenu_nodename) == 0))
+ break;
+ }
+
+ /* If we couldn't find an existing window, try to use the next window
+ in the chain. */
+ if (!new && window->next)
+ new = window->next;
+
+ /* If we still don't have a window, make a new one to contain the list. */
+ if (!new)
+ {
+ WINDOW *old_active;
+
+ old_active = active_window;
+ active_window = window;
+ new = window_make_window ((NODE *)NULL);
+ active_window = old_active;
+ }
+
+ /* If we couldn't make a new window, use this one. */
+ if (!new)
+ new = window;
+
+ /* Lines do not wrap in this window. */
+ new->flags |= W_NoWrap;
+ node = get_visited_nodes ((Function *)NULL);
+ name_internal_node (node, nodemenu_nodename);
+
+ /* Even if 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. */
+ node->flags &= ~N_IsInternal;
+
+ /* If this window is already showing a node menu, reuse the existing node
+ slot. */
+ {
+ int remember_me = 1;
+
+#if defined (NOTDEF)
+ if (internal_info_node_p (new->node) &&
+ (strcmp (new->node->nodename, nodemenu_nodename) == 0))
+ remember_me = 0;
+#endif /* NOTDEF */
+
+ window_set_node_of_window (new, node);
+
+ if (remember_me)
+ remember_window_and_node (new, node);
+ }
+
+ active_window = new;
+}
+
+DECLARE_INFO_COMMAND (select_visited_node,
+ "Select a node which has been previously visited in a visible window")
+{
+ char *line;
+ NODE *node;
+ REFERENCE **menu;
+
+ node = get_visited_nodes ((Function *)NULL);
+
+ menu = info_menu_of_node (node);
+ free (node);
+
+ line =
+ info_read_completing_in_echo_area (window, "Select visited node: ", menu);
+
+ window = active_window;
+
+ /* User aborts, just quit. */
+ if (!line)
+ {
+ info_abort_key (window, 0, 0);
+ info_free_references (menu);
+ return;
+ }
+
+ if (*line)
+ {
+ REFERENCE *entry;
+
+ /* Find the selected label in the references. */
+ entry = info_get_labeled_reference (line, menu);
+
+ if (!entry)
+ info_error ("The reference disappeared! (%s).", line);
+ else
+ info_select_reference (window, entry);
+ }
+
+ free (line);
+ info_free_references (menu);
+
+ if (!info_error_was_printed)
+ window_clear_echo_area ();
+}
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