/usr/share/jed/jed-extra/gdbmrecent.sl is in jed-extra 2.5.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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%
% $Id: gdbmrecent.sl,v 1.8 2008/03/22 14:44:00 paul Exp paul $
% Keywords: convenience
%
% Copyright (c) 2004-2008 Paul Boekholt.
% Released under the terms of the GNU GPL (version 2 or later).
%
% Yet another recent mode. This one was written to test my gdbm module.
% You should get slgdbm version 1.7 or later from
% http://www.cheesit.com/downloads/slang/slgdbm.html
% or if you're on Debian install the slang-gdbm package.
%
% Features:
% -delayed synchronization of the database. It should still be possible
% to work in multiple instances at the same time
% -stores line and column information
% -goes to last line and column even when file is not opened from recent menu
% -recent menu shows only the most recent `Recent_Max_Cached_Files' files, but line and
% column information is remembered for Recent_Files_Expire_Time days.
% -Make buffer-local variables persistent. For now this can be used to make
% a buffer's ispell dictionary setting persist.
require("gdbm");
provide("recent");
provide("gdbmrecent");
require ("sl_utils");
% customvariables.
% where to store the list
custom_variable("Recent_Db", dircat(Jed_Home_Directory, "recent_db"));
% length of the recent popup menu
custom_variable("Recent_Max_Cached_Files", 15);
% regexp for files not to be added to the recent list (/tmp/mutt-1234)
custom_variable("Recent_Files_Exclude_Pattern", "/tmp");
% Time before entries expire (in days)
custom_variable("Recent_Files_Expire_Time", 7);
% This is a comma-separated list of blocal variables that are stored in the
% recent files database. The entry is still purged if a file is not opened
% for a week. The blocal's values have to be strings, and for now `=' and `:'
% are not allowed in them.
custom_variable("Gdbm_Pvars", "ispell_dictionary");
% the idea of the recent_flag is that when a script opens a file that should
% not be added to the recent list it should say
% public variable recent_flag;
% ...
% recent_flag = 0;
% () = find_file("/some/file");
public variable recent_flag=1;
private variable recent_files=Assoc_Type[String_Type];
% Return a cache entry for the current buffer (see getbuf_info)
% (NULL if file matches Exclude Pattern or no file
% associated with buffer)
private define getbuf_filemark()
{
if(blocal_var_exists("no_recent")) return NULL;
variable entry = buffer_filename();
if (not strlen(entry) || string_match(entry, Recent_Files_Exclude_Pattern, 1))
return NULL;
variable varname, val=sprintf("%d:%d:%d",_time(), what_line_if_wide(), what_column());
foreach varname (strchop(Gdbm_Pvars, ',', 0))
{
if (blocal_var_exists(varname))
val = sprintf("%s:%s=%s", val, varname, get_blocal_var(varname));
}
return [entry, val];
}
% find_file_after_hook
% goto line, column
% update date in assoc
private define open_hook ()
{
ifnot (recent_flag)
{
create_blocal_var("no_recent");
recent_flag = 1;
return;
}
variable date, line=1, column=1, pvars="", pvar;
variable filename = buffer_filename();
if (not strlen(filename) || string_match(filename, Recent_Files_Exclude_Pattern, 1))
return;
variable val = NULL, db=gdbm_open(Recent_Db, GDBM_READER, 0600);
if (db != NULL)
val = db[filename];
if (val != NULL && 3 <= sscanf(val, "%d:%d:%d%s", &date, &line, &column, &pvars))
{
% goto saved position
goto_line(line);
() = goto_column_best_try(column);
% open folds
loop(10) % while (is_line_hidden) might cause an infinite loop!
{
ifnot(is_line_hidden) break;
runhooks("fold_open_fold");
}
if (strlen(pvars))
{
foreach pvar (strchop(pvars, ':', 0))
{
pvar=strchop(pvar, '=', 0);
if (2==length(pvar))
define_blocal_var(pvar[0], pvar[1]);
}
}
}
recent_files[filename] = sprintf("%d:%d:%d:%s", _time(), what_line(),
what_column(), pvars);
}
% save hook
% update assoc
private define save_hook()
{
_pop_n (_NARGS); % remove spurious arguments from stack
variable filemark = getbuf_filemark();
if (filemark == NULL) return;
recent_files[filemark[0]] = filemark[1];
}
% save the recent files assoc to the database
private define update_db(db)
{
variable k, v;
foreach k, v (recent_files) using ("keys", "values")
{
% if write fails, stop trying
if (gdbm_store(db, k, v, GDBM_REPLACE))
break;
}
recent_files=Assoc_Type[String_Type];
}
private define _get_files(db)
{
variable keys, values, dates;
(keys, values) = gdbm_get_keys_and_values(db);
dates = array_map(Integer_Type, &atoi, values);
keys = keys[array_sort(-dates)];
return keys;
}
public define recent_get_files()
{
variable db=gdbm_open(Recent_Db, GDBM_READER, 0600);
if (db != NULL)
_get_files(db);
}
% build the menu
private define menu_callback (popup)
{
variable db=gdbm_open(Recent_Db, GDBM_WRCREAT, 0600);
if (db == NULL) return vmessage("gdbm: %s", gdbm_error());
update_db(db);
variable keys, l, i;
keys = _get_files(db);
l = length(keys);
if (l > Recent_Max_Cached_Files)
l = Recent_Max_Cached_Files;
_for i (0, l - 1, 1)
{
menu_append_item (popup, keys[i], sprintf ("() = find_file (\"%s\")", keys[i]));
}
}
% this shows a menu of at most Recent_Max_Cached_Files that were opened in the
% current buffer's directory or a subdirectory thereof.
private define recent_here_callback (popup)
{
variable dir;
( , dir, , ) = getbuf_info();
variable dirlen = strlen(dir);
ifnot(dirlen) return;
variable db=gdbm_open(Recent_Db, GDBM_WRCREAT, 0600);
if (db == NULL) return vmessage("gdbm: %s", gdbm_error());
update_db(db);
variable keys, l, i;
keys = _get_files(db);
keys = keys[where(not array_map(Integer_Type, &strncmp, keys, dir, dirlen))];
l = length(keys);
if (l > Recent_Max_Cached_Files)
l = Recent_Max_Cached_Files;
_for i (0, l - 1, 1)
{
menu_append_item (popup, keys[i], sprintf ("() = find_file (\"%s\")", keys[i]));
}
}
private define purge_not_so_recent(db)
{
variable key, keys, values, dates;
(keys, values) = gdbm_get_keys_and_values(db);
variable cutoff_date = _time() - 86400 * Recent_Files_Expire_Time;
dates = array_map(Integer_Type, &atoi, values);
keys = keys[where(dates < cutoff_date)];
% it's not possible to use foreach(db) here
% see info:(gdbm)Sequential
foreach key (keys)
{
()=gdbm_delete(db, key);
}
}
% update the cache's line/col info
% purge entries older than a week
private define exit_hook()
{
try
{
variable db=gdbm_open(Recent_Db, GDBM_WRCREAT, 0600);
variable filemark, buf;
if (db != NULL)
{
% update line/col info
loop (buffer_list())
{
buf = ();
ifnot(strlen(buf)) continue;
sw2buf(buf);
filemark = getbuf_filemark();
if (filemark != NULL)
recent_files[filemark[0]] = filemark[1];
}
update_db(db);
purge_not_so_recent(db);
variable st=stat_file(Recent_Db);
if (st.st_size > 50000)
()=gdbm_reorganize(db);
}
}
catch AnyError;
return 1; % tell _jed_exit_hooks to continue
}
private define add_recent_files_popup_hook (menubar)
{
variable menu = "Global.&File";
menu_insert_popup (0, menu, "&Recent Files");
menu_set_select_popup_callback (strcat (menu, ".&Recent Files"),
&menu_callback);
menu_insert_popup (1, menu, "&Recent Here");
menu_set_select_popup_callback (strcat (menu, ".&Recent Here"),
&recent_here_callback);
}
append_to_hook ("_jed_find_file_after_hooks", &open_hook);
append_to_hook("_jed_save_buffer_after_hooks", &save_hook);
% update list at exit
append_to_hook("_jed_exit_hooks", &exit_hook);
append_to_hook ("load_popup_hooks", &add_recent_files_popup_hook);
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