mirror of
https://github.com/vale981/emacs-ipython-notebook
synced 2025-03-06 01:21:38 -05:00
77 lines
2.5 KiB
EmacsLisp
77 lines
2.5 KiB
EmacsLisp
;;; ein-events.el --- Event module
|
||
|
||
;; Copyright (C) 2012- Takafumi Arakaki
|
||
|
||
;; Author: Takafumi Arakaki <aka.tkf at gmail.com>
|
||
|
||
;; This file is NOT part of GNU Emacs.
|
||
|
||
;; ein-events.el 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 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; ein-events.el 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 ein-events.el. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
|
||
;;
|
||
|
||
;;; Code:
|
||
|
||
(eval-when-compile (require 'cl))
|
||
(require 'eieio)
|
||
|
||
(require 'ein-log)
|
||
(require 'ein-utils)
|
||
|
||
|
||
;;; Events handling class
|
||
|
||
(defclass ein:events ()
|
||
((buffer :initarg :buffer :type buffer :document "Notebook buffer")
|
||
(callbacks :initarg :callbacks :type hash-table
|
||
:initform (make-hash-table :test 'eq)))
|
||
"Event handler class.")
|
||
|
||
(defun ein:events-new (buffer)
|
||
"Return a new event handler instance."
|
||
(ein:events "Events" :buffer buffer))
|
||
|
||
(defun ein:events-trigger (events event-type &optional data)
|
||
"Trigger EVENT-TYPE and let event handler EVENTS handle that event."
|
||
(ein:log 'debug "Event: %S" event-type)
|
||
;; Ensure that event is handled in the related buffer.
|
||
;; This helps logging by `ein:log' (and maybe EWOC?).
|
||
(with-current-buffer (oref events :buffer)
|
||
(ein:aif (gethash event-type (oref events :callbacks))
|
||
(mapc (lambda (cb-arg) (ein:funcall-packed cb-arg data)) it)
|
||
(ein:log 'info "Unknown event: %S" event-type))))
|
||
|
||
|
||
(defmethod ein:events-on ((events ein:events) event-type
|
||
callback &optional arg)
|
||
"Set event trigger hook.
|
||
|
||
When EVENT-TYPE is triggered on the event handler EVENTS,
|
||
CALLBACK is called. CALLBACK must take two arguments:
|
||
ARG as the first argument and DATA, which is passed via
|
||
`ein:events-trigger', as the second. When calling the function,
|
||
current buffer is set to the configured buffer. `ein:events-new'
|
||
is used to configure the buffer."
|
||
(assert (symbolp event-type))
|
||
(let* ((table (oref events :callbacks))
|
||
(cbs (gethash event-type table)))
|
||
(push (cons callback arg) cbs)
|
||
(puthash event-type cbs table)))
|
||
|
||
|
||
(provide 'ein-events)
|
||
|
||
;;; ein-events.el ends here
|