Tom Willemse
9e30a9cd87
- desktop-registry.el (desktop-registry-add-directory): Add an optional NAME parameter which will be asked for (in an interactive context) when the universal argument is used. Print a message if the specified directory has already been registered, signal an error when the (given or generated) name has already been used and only add the directory if neither of these conditions occur. (desktop-registry-add-current-desktop): Add optional NAME parameter which will be asked for (in an interactive context) when the universal argument is used and pass it on to `desktop-registry-add-directory'.
144 lines
5.3 KiB
EmacsLisp
144 lines
5.3 KiB
EmacsLisp
;;; desktop-registry.el --- Keep a central registry of desktop files -*- lexical-binding: t -*-
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;; Copyright (C) 2013 Tom Willemse
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;; Author: Tom Willemse <tom@ryuslash.org>
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;; Keywords: convenience
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;; Version: 1.0.0
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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 3 of the License, or
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;; (at your option) 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, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module provides functions and a global minor mode that lets
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;; you track a central registry of desktop files. This is useful when
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;; you use desktop files as project files and want to be able to
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;; switch between them quickly.
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(require 'desktop)
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;;; Code:
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(defgroup desktop-registry nil
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"Customization group for desktop-registry."
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:group 'desktop
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:prefix 'desktop-registry)
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(defcustom desktop-registry-registry nil
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"The registry of desktop files."
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:group 'desktop-registry
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:type '(repeat (cons string directory)))
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(defvar desktop-registry--history nil
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"History variable for `desktop-registry'.")
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(defun desktop-registry--canonicalize-dir (dir)
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"Canonicalize DIR for use."
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(directory-file-name (expand-file-name dir)))
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;;;###autoload
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(defun desktop-registry-current-desktop (&optional default)
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"Get the name of the currently loaded desktop.
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Returns DEFAULT when `desktop-dirname' is nil."
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(if desktop-dirname
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(let ((canonical
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(desktop-registry--canonicalize-dir desktop-dirname)))
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(car (cl-find-if (lambda (d) (equal (cdr d) canonical))
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desktop-registry-registry)))
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default))
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;;;###autoload
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(defun desktop-registry-add-directory (dir &optional name)
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"Add DIR to the desktop registry, possibly using NAME."
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(interactive (list (read-directory-name "Directory: ")
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(if (equal current-prefix-arg '(4))
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(read-string "Name: "))))
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(let* ((clean-dir (desktop-registry--canonicalize-dir dir))
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(label (or name (file-name-base clean-dir))))
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(cond
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((cl-find clean-dir desktop-registry-registry
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:key 'cdr :test 'equal)
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(message "Directory %s already registered" clean-dir))
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((cl-find label desktop-registry-registry :key 'car :test 'equal)
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(error "Name %s already used" label))
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(t (customize-save-variable
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'desktop-registry-registry
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(cons (cons label clean-dir) desktop-registry-registry))))))
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;;;###autoload
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(defun desktop-registry-add-current-desktop (&optional name)
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"Add the currently opened desktop file to `desktop-registry-registry'.
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If NAME is specified use that as the name for the registry entry."
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(interactive (list (if (equal current-prefix-arg '(4))
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(read-string "Name: "))))
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(unless desktop-dirname
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(error "No desktop loaded"))
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(desktop-registry-add-directory desktop-dirname name))
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(defun desktop-registry--completing-read (&optional prompt
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default-current)
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"Ask the user to pick a desktop directory.
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PROMPT specifies the prompt to use when asking, which defaults to
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\"Desktop: \". DEFAULT-CURRENT specifies whether to use the
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current desktop as default value."
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(let ((prompt (or prompt "Desktop: "))
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(default (and default-current
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(desktop-registry-current-desktop))))
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(completing-read prompt desktop-registry-registry nil nil nil
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'desktop-registry--history default)))
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;;;###autoload
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(defun desktop-registry-remove-desktop (desktop)
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"Remove DESKTOP from the desktop registry."
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(interactive (list (desktop-registry--completing-read "Remove: " t)))
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(let ((spec (assoc desktop desktop-registry-registry)))
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(if spec
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(customize-save-variable
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'desktop-registry-registry
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(delete spec desktop-registry-registry))
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(error "Unknown desktop: %s" desktop))))
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;;;###autoload
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(defun desktop-registry-rename-desktop (old new)
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"Rename desktop OLD to NEW."
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(interactive (list (desktop-registry--completing-read "Rename: " t)
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(read-string "to: ")))
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(let ((spec (assoc old desktop-registry-registry)))
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(if (not spec)
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(error "Unknown desktop: %s" old)
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(setf (car spec) new)
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(customize-save-variable 'desktop-registry-registry
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desktop-registry-registry))))
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;;;###autoload
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(defun desktop-registry-change-desktop (name)
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"Change to the desktop named NAME."
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(interactive (list (desktop-registry--completing-read "Switch to: ")))
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(desktop-change-dir (cdr (assoc name desktop-registry-registry))))
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;;;###autoload
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(define-minor-mode desktop-registry-auto-register
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"Automatically add saved desktops to the registry."
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:global t
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(if desktop-registry-auto-register
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(add-hook 'desktop-save-hook
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'desktop-registry-add-current-desktop)
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(remove-hook 'desktop-save-hook
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'desktop-registry-add-current-desktop)))
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(provide 'desktop-registry)
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;;; desktop-registry.el ends here
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