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202 lines
6.6 KiB
EmacsLisp
202 lines
6.6 KiB
EmacsLisp
;;; url-history.el --- Global history tracking for URL package
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;; Copyright (C) 1996, 1997, 1998, 1999, 2004,
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;; 2005 Free Software Foundation, Inc.
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;; Keywords: comm, data, processes, hypermedia
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs 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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;;
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;; GNU Emacs 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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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Code:
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;; This can get a recursive require.
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;;(require 'url)
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(eval-when-compile (require 'cl))
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(require 'url-parse)
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(autoload 'url-do-setup "url")
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(defgroup url-history nil
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"History variables in the URL package."
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:prefix "url-history"
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:group 'url)
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(defcustom url-history-track nil
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"*Controls whether to keep a list of all the URLS being visited.
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If non-nil, url will keep track of all the URLS visited.
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If set to t, then the list is saved to disk at the end of each Emacs
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session."
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:type 'boolean
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:group 'url-history)
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(defcustom url-history-file nil
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"*The global history file for the URL package.
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This file contains a list of all the URLs you have visited. This file
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is parsed at startup and used to provide URL completion."
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:type '(choice (const :tag "Default" :value nil) file)
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:group 'url-history)
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(defcustom url-history-save-interval 3600
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"*The number of seconds between automatic saves of the history list.
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Default is 1 hour. Note that if you change this variable outside of
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the `customize' interface after `url-do-setup' has been run, you need
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to run the `url-history-setup-save-timer' function manually."
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:set (function (lambda (var val)
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(set-default var val)
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(and (featurep 'url)
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(fboundp 'url-history-setup-save-timer)
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(let ((def (symbol-function
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'url-history-setup-save-timer)))
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(not (and (listp def) (eq 'autoload (car def)))))
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(url-history-setup-save-timer))))
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:type 'integer
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:group 'url-history)
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(defvar url-history-timer nil)
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(defvar url-history-list nil
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"List of urls visited this session.")
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(defvar url-history-changed-since-last-save nil
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"Whether the history list has changed since the last save operation.")
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(defvar url-history-hash-table nil
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"Hash table for global history completion.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;###autoload
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(defun url-history-setup-save-timer ()
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"Reset the history list timer."
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(interactive)
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(ignore-errors
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(cond ((fboundp 'cancel-timer) (cancel-timer url-history-timer))
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((fboundp 'delete-itimer) (delete-itimer url-history-timer))))
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(setq url-history-timer nil)
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(if url-history-save-interval
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(setq url-history-timer
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(cond
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((fboundp 'run-at-time)
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(run-at-time url-history-save-interval
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url-history-save-interval
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'url-history-save-history))
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((fboundp 'start-itimer)
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(start-itimer "url-history-saver" 'url-history-save-history
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url-history-save-interval
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url-history-save-interval))))))
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;;;###autoload
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(defun url-history-parse-history (&optional fname)
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"Parse a history file stored in FNAME."
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;; Parse out the mosaic global history file for completions, etc.
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(or fname (setq fname (expand-file-name url-history-file)))
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(cond
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((not (file-exists-p fname))
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(message "%s does not exist." fname))
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((not (file-readable-p fname))
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(message "%s is unreadable." fname))
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(t
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(condition-case nil
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(load fname nil t)
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(error (message "Could not load %s" fname)))))
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(if (not url-history-hash-table)
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(setq url-history-hash-table (make-hash-table :size 31 :test 'equal))))
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(defun url-history-update-url (url time)
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(setq url-history-changed-since-last-save t)
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(puthash (if (vectorp url) (url-recreate-url url) url) time url-history-hash-table))
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;;;###autoload
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(defun url-history-save-history (&optional fname)
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"Write the global history file into `url-history-file'.
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The type of data written is determined by what is in the file to begin
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with. If the type of storage cannot be determined, then prompt the
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user for what type to save as."
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(interactive)
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(or fname (setq fname (expand-file-name url-history-file)))
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(cond
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((not url-history-changed-since-last-save) nil)
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((not (file-writable-p fname))
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(message "%s is unwritable." fname))
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(t
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(let ((make-backup-files nil)
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(version-control nil)
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(require-final-newline t))
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(save-excursion
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(set-buffer (get-buffer-create " *url-tmp*"))
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(erase-buffer)
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(let ((count 0))
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(maphash (function
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(lambda (key value)
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(while (string-match "[\r\n]+" key)
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(setq key (concat (substring key 0 (match-beginning 0))
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(substring key (match-end 0) nil))))
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(setq count (1+ count))
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(insert "(puthash \"" key "\""
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(if (not (stringp value)) " '" "")
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(prin1-to-string value)
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" url-history-hash-table)\n")))
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url-history-hash-table)
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(goto-char (point-min))
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(insert (format
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"(setq url-history-hash-table (make-hash-table :size %d :test 'equal))\n"
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(/ count 4)))
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(goto-char (point-max))
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(insert "\n")
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(write-file fname))
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(kill-buffer (current-buffer))))))
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(setq url-history-changed-since-last-save nil))
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(defun url-have-visited-url (url)
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(url-do-setup)
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(and url-history-hash-table
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(gethash url url-history-hash-table nil)))
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(defun url-completion-function (string predicate function)
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(url-do-setup)
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(cond
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((eq function nil)
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(let ((list nil))
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(maphash (function (lambda (key val)
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(setq list (cons (cons key val)
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list))))
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url-history-hash-table)
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(try-completion string (nreverse list) predicate)))
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((eq function t)
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(let ((stub (concat "^" (regexp-quote string)))
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(retval nil))
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(maphash
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(function
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(lambda (url time)
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(if (string-match stub url)
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(setq retval (cons url retval)))))
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url-history-hash-table)
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retval))
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((eq function 'lambda)
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(and url-history-hash-table
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(gethash string url-history-hash-table)
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t))
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(t
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(error "url-completion-function very confused"))))
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(provide 'url-history)
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;; arch-tag: fbbbaf63-db36-4e88-bc9f-2939aa93afb2
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;;; url-history.el ends here
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