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authorStefan Monnier <monnier@iro.umontreal.ca>2004-04-04 01:21:46 +0000
committerStefan Monnier <monnier@iro.umontreal.ca>2004-04-04 01:21:46 +0000
commit8c8b8430b557f8f1503bfecce39b6f2938665e5a (patch)
tree1ed7295c23b469148f8996b6b37b11e9936fb7a1 /lisp/url/url-history.el
parent5c84686c48f49474e4b5b59ab859ff56fc7248d2 (diff)
downloademacs-8c8b8430b557f8f1503bfecce39b6f2938665e5a.tar.gz
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+;;; url-history.el --- Global history tracking for URL package
+;; Author: $Author: fx $
+;; Created: $Date: 2001/05/05 16:49:52 $
+;; Version: $Revision: 1.6 $
+;; Keywords: comm, data, processes, hypermedia
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Copyright (c) 1993 - 1996 by William M. Perry <wmperry@cs.indiana.edu>
+;;; Copyright (c) 1996 - 1999 Free Software Foundation, Inc.
+;;;
+;;; This file is part of GNU Emacs.
+;;;
+;;; GNU Emacs 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.
+;;;
+;;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
+;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;;; Boston, MA 02111-1307, USA.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; This can get a recursive require.
+;;(require 'url)
+(eval-when-compile (require 'cl))
+(require 'url-parse)
+(autoload 'url-do-setup "url")
+
+(defgroup url-history nil
+ "History variables in the URL package"
+ :prefix "url-history"
+ :group 'url)
+
+(defcustom url-history-track nil
+ "*Controls whether to keep a list of all the URLS being visited.
+If non-nil, url will keep track of all the URLS visited.
+If eq to `t', then the list is saved to disk at the end of each emacs
+session."
+ :type 'boolean
+ :group 'url-history)
+
+(defcustom url-history-file nil
+ "*The global history file for the URL package.
+This file contains a list of all the URLs you have visited. This file
+is parsed at startup and used to provide URL completion."
+ :type '(choice (const :tag "Default" :value nil) file)
+ :group 'url-history)
+
+(defcustom url-history-save-interval 3600
+ "*The number of seconds between automatic saves of the history list.
+Default is 1 hour. Note that if you change this variable outside of
+the `customize' interface after `url-do-setup' has been run, you need
+to run the `url-history-setup-save-timer' function manually."
+ :set (function (lambda (var val)
+ (set-default var val)
+ (and (featurep 'url)
+ (fboundp 'url-history-setup-save-timer)
+ (let ((def (symbol-function
+ 'url-history-setup-save-timer)))
+ (not (and (listp def) (eq 'autoload (car def)))))
+ (url-history-setup-save-timer))))
+ :type 'integer
+ :group 'url-history)
+
+(defvar url-history-timer nil)
+
+(defvar url-history-list nil
+ "List of urls visited this session.")
+
+(defvar url-history-changed-since-last-save nil
+ "Whether the history list has changed since the last save operation.")
+
+(defvar url-history-hash-table nil
+ "Hash table for global history completion.")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;;###autoload
+(defun url-history-setup-save-timer ()
+ "Reset the history list timer."
+ (interactive)
+ (cond
+ ((featurep 'itimer)
+ (ignore-errors (delete-itimer url-history-timer))
+ (setq url-history-timer nil)
+ (if url-history-save-interval
+ (setq url-history-timer
+ (start-itimer "url-history-saver" 'url-history-save-history
+ url-history-save-interval
+ url-history-save-interval))))
+ ((fboundp 'run-at-time)
+ (ignore-errors (cancel-timer url-history-timer))
+ (setq url-history-timer nil)
+ (if url-history-save-interval
+ (setq url-history-timer
+ (run-at-time url-history-save-interval
+ url-history-save-interval
+ 'url-history-save-history))))
+ (t nil)))
+
+;;;###autoload
+(defun url-history-parse-history (&optional fname)
+ "Parse a history file stored in FNAME."
+ ;; Parse out the mosaic global history file for completions, etc.
+ (or fname (setq fname (expand-file-name url-history-file)))
+ (cond
+ ((not (file-exists-p fname))
+ (message "%s does not exist." fname))
+ ((not (file-readable-p fname))
+ (message "%s is unreadable." fname))
+ (t
+ (condition-case nil
+ (load fname nil t)
+ (error (message "Could not load %s" fname)))))
+ (if (not url-history-hash-table)
+ (setq url-history-hash-table (make-hash-table :size 31 :test 'equal))))
+
+(defun url-history-update-url (url time)
+ (setq url-history-changed-since-last-save t)
+ (puthash (if (vectorp url) (url-recreate-url url) url) time url-history-hash-table))
+
+;;;###autoload
+(defun url-history-save-history (&optional fname)
+ "Write the global history file into `url-history-file'.
+The type of data written is determined by what is in the file to begin
+with. If the type of storage cannot be determined, then prompt the
+user for what type to save as."
+ (interactive)
+ (or fname (setq fname (expand-file-name url-history-file)))
+ (cond
+ ((not url-history-changed-since-last-save) nil)
+ ((not (file-writable-p fname))
+ (message "%s is unwritable." fname))
+ (t
+ (let ((make-backup-files nil)
+ (version-control nil)
+ (require-final-newline t))
+ (save-excursion
+ (set-buffer (get-buffer-create " *url-tmp*"))
+ (erase-buffer)
+ (let ((count 0))
+ (maphash (function
+ (lambda (key value)
+ (while (string-match "[\r\n]+" key)
+ (setq key (concat (substring key 0 (match-beginning 0))
+ (substring key (match-end 0) nil))))
+ (setq count (1+ count))
+ (insert "(puthash \"" key "\""
+ (if (not (stringp value)) " '" "")
+ (prin1-to-string value)
+ " url-history-hash-table)\n")))
+ url-history-hash-table)
+ (goto-char (point-min))
+ (insert (format
+ "(setq url-history-hash-table (make-hash-table :size %d :test 'equal))\n"
+ (/ count 4)))
+ (goto-char (point-max))
+ (insert "\n")
+ (write-file fname))
+ (kill-buffer (current-buffer))))))
+ (setq url-history-changed-since-last-save nil))
+
+(defun url-have-visited-url (url)
+ (url-do-setup)
+ (gethash url url-history-hash-table nil))
+
+(defun url-completion-function (string predicate function)
+ (url-do-setup)
+ (cond
+ ((eq function nil)
+ (let ((list nil))
+ (maphash (function (lambda (key val)
+ (setq list (cons (cons key val)
+ list))))
+ url-history-hash-table)
+ (try-completion string (nreverse list) predicate)))
+ ((eq function t)
+ (let ((stub (concat "^" (regexp-quote string)))
+ (retval nil))
+ (maphash
+ (function
+ (lambda (url time)
+ (if (string-match stub url)
+ (setq retval (cons url retval)))))
+ url-history-hash-table)
+ retval))
+ ((eq function 'lambda)
+ (and url-history-hash-table
+ (gethash string url-history-hash-table)
+ t))
+ (t
+ (error "url-completion-function very confused."))))
+
+(provide 'url-history)