mirror of https://github.com/djcb/mu.git
104 lines
4.0 KiB
EmacsLisp
104 lines
4.0 KiB
EmacsLisp
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; mu4e-context.el -- part of mu4e, the mu mail user agent
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;;
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;; Copyright (C) 2015 Dirk-Jan C. Binnema
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;; Author: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Maintainer: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; This file is not 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 3 of the License, or
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;; (at your option) any later version.
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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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; A mu4e 'context' is a a set of variable-settings and hooks, which can be used e.g. to switch
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;; between accounts.
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(require 'cl)
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(require 'mu4e-utils)
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(defvar mu4e-contexts nil "The list of context objects.")
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(defvar mu4e~context-current nil
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"The current context. Use `mu4e-context-switch' to change it.")
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(defun mu4e-context-current ()
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"Get the currently active context, or nil if there is none."
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mu4e~context-current)
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(defun mu4e-context-label ()
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"Propertized string with the current context name, or \"\" if
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there is none."
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(if (mu4e-context-current)
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(concat "[" (propertize (mu4e-context-name (mu4e-context-current))
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'face 'mu4e-title-face) "]") ""))
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(defstruct mu4e-context
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"A mu4e context object with the following members:
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- `name': the name of the context, eg. \"Work\" or \"Private\".'
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- `enter-func': a parameterless function invoked when entering this context, or nil
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- `leave-func':a parameterless fuction invoked when leaving this context, or nil
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- `match-func': a function called when comnposing a new messages, and takes a message plist
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for the message replied to or forwarded, and nil otherwise. Before composing a new message,
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`mu4e' switches to the first context for which `match-func' return t."
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name ;; name of the context, e.g. "work"
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(enter-func nil) ;; function invoked when entering the context
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(leave-func nil) ;; function invoked when leaving the context
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(match-func nil) ;; function that takes a msg-proplist, and return t
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;; if it matches, nil otherwise
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vars) ;; alist of variables.
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(defun mu4e-context-switch (&optional name)
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"Switch context to a context with NAME which is part of
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`mu4e-contexts'; if NAME is nil, query user."
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(interactive)
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(unless mu4e-contexts
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(mu4e-error "No contexts defined"))
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(let* ((names (map 'list (lambda (context)
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(cons (mu4e-context-name context) context))
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mu4e-contexts))
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(context
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(if name (cdr-safe (assoc name names))
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(mu4e-read-option "Switch to context: " names))))
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(unless context (mu4e-error "No such context"))
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;; leave the current context
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(when (and mu4e~context-current (mu4e-context-leave-func mu4e~context-current))
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(funcall (mu4e-context-leave-func mu4e~context-current)))
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;; enter the new context
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(when (mu4e-context-enter-func context)
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(funcall (mu4e-context-enter-func context)))
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(when (mu4e-context-vars context)
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(mapc #'(lambda (cell)
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(set (car cell) (cdr cell)))
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(mu4e-context-vars context)))
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(setq mu4e~context-current context)
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(mu4e-message "Switched context to %s" (mu4e-context-name context))
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context))
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(defun mu4e-context-determine (msg)
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"Return the first context with a match-func that returns t. MSG
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points to the plist for the message replied to or forwarded, or
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nil if there is no such MSG; similar to what
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`mu4e-compose-pre-hook' does. If no context matches, return
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nil."
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(when mu4e-contexts
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(find-if (lambda (context)
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(and (mu4e-context-match-func context)
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(funcall (mu4e-context-match-func context) msg)))
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mu4e-contexts)))
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(provide 'mu4e-context)
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