96 lines
3 KiB
EmacsLisp
96 lines
3 KiB
EmacsLisp
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;;; autosmiley.el --- Convert smileys into their graphical representation
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;; Author: Damyan Pepper (gmail account, username damyanp)
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;; Created: 20060315
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; 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, you can either send email to this
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;; program's maintainer or write to: The Free Software Foundation,
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;; Inc.; 59 Temple Place, Suite 330; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Defines the minor mode autosmiley-mode that converts smileys like
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;; :-) into their graphical representations on the fly.
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;; Tested on:
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;;
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;; GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600) of 2006-03-14 on W2ONE
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;;
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;; History:
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;;
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;; 20060315 - First Release
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(require 'smiley)
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(defun autosmiley-overlay-p (overlay)
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"Return whether OVERLAY is an overlay of autosmiley mode."
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(memq (overlay-get overlay 'category)
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'(autosmiley)))
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(defun autosmiley-remove-smileys (beg end)
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(dolist (o (overlays-in beg end))
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(when (autosmiley-overlay-p o)
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(delete-overlay o))))
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(defvar *autosmiley-counter* 0
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"Each smiley needs to have a unique display string otherwise
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adjacent smileys will be merged into a single image. So we put
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a counter on each one to make them unique")
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(defun autosmiley-add-smiley (beg end image)
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(let ((overlay (make-overlay beg end)))
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(overlay-put overlay 'category 'autosmiley)
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(overlay-put overlay 'display (append image (list :counter (incf *autosmiley-counter*))))))
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(defun autosmiley-add-smileys (beg end)
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(save-excursion
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(dolist (entry smiley-cached-regexp-alist)
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(let ((regexp (car entry))
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(group (nth 1 entry))
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(image (nth 2 entry)))
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(when image
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(goto-char beg)
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(while (re-search-forward regexp end t)
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(autosmiley-add-smiley (match-beginning group) (match-end group) image)))))))
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(defun autosmiley-change (beg end &optional old-len)
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(let ((beg-line (save-excursion (goto-char beg) (line-beginning-position)))
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(end-line (save-excursion (goto-char end) (line-end-position))))
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(autosmiley-remove-smileys beg-line end-line)
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(autosmiley-add-smileys beg-line end-line)))
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;;;###autoload
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(define-minor-mode autosmiley-mode
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"Minor mode for automatically replacing smileys in text with
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cute little graphical smileys."
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:group 'autosmiley :lighter " :)"
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(save-excursion
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(save-restriction
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(widen)
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(autosmiley-remove-smileys (point-min) (point-max))
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(if autosmiley-mode
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(progn
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(unless smiley-cached-regexp-alist
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(smiley-update-cache))
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(jit-lock-register 'autosmiley-change))
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(jit-lock-unregister 'autosmiley-change)))))
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(provide 'autosmiley)
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