456 lines
17 KiB
EmacsLisp
456 lines
17 KiB
EmacsLisp
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;;; html-write.el --- Hide some tags for writing text in XHTML
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;;
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;; Author: Lennart Borgman (lennart O borgman A gmail O com)
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;; Created: 2008-10-03T01:29:44+0200 Thu
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(defconst html-write:version "0.6") ;; Version:
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;; Last-Updated: 2009-08-11 Tue
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;; URL:
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;; Keywords:
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;; Compatibility:
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;;
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;; Features that might be required by this library:
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;;
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;; None
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;;
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;; The minor mode `html-write-mode' displays simple tags like <i>,
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;; <b>, <em>, <strong> or <a> with appropriate faces (for example bold
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;; and italic) instead of displaying the tags.
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;;
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Change log:
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;;
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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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
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;; (at your option) any later version.
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;;
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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 GNU
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;; 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 this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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;; Floor, Boston, MA 02110-1301, USA.
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Code:
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;; Silence byte compiler
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(defvar jit-lock-start)
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(defvar jit-lock-end)
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(eval-when-compile (require 'mumamo)) ;; Just for the defmacro ...
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(eval-when-compile (require 'mlinks nil t))
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;;;###autoload
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(defgroup html-write nil
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"Customization group for html-write."
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:group 'nxhtml
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:group 'convenience)
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(defface html-write-base
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'((t (:inherit font-lock-type-face)))
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"Face from which other faces inherits."
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:group 'html-write)
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(defface html-write-em
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'((t (:inherit html-write-base :slant italic)))
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"Face used for <em> tags."
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:group 'html-write)
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(defface html-write-strong
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'((t (:inherit html-write-base :weight bold)))
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"Face used for <strong> tags."
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:group 'html-write)
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(defface html-write-link
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'((t (:inherit html-write-base :underline t)))
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"Face used for <a> tags."
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:group 'html-write)
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(defconst html-write-tag-list
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'(("i" html-write-em-tag-actions)
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("b" html-write-strong-tag-actions)
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("em" html-write-em-tag-actions)
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("strong" html-write-strong-tag-actions)
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("a" html-write-a-tag-actions)
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;;("img" html-write-img-tag-actions t)
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)
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"List of tags that should be hidden.
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A record in the list has the format
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\(TAG HANDLE [SINGLE])
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where
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- TAG is the tag name string.
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- HANDLE is a function to call when hiding the tag. It takes
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three parameters, TAG-BEGIN, TAG-END and OVERLAY. TAG-BEGIN
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and TAG-END are start and end of the start tag. OVERLAY is an
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overlay used for faces, keymaps etc that covers the whole tag."
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)
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(defun html-write-em-tag-actions (tag-begin tag-end overlay)
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"Do actions for <em> tags for tag between TAG-BEGIN and TAG-END.
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OVERLAY is the overlay added by `html-write-mode' for this tag."
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(overlay-put overlay 'face 'html-write-em))
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(defun html-write-strong-tag-actions (tag-begin tag-end overlay)
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"Do actions for <strong> tags for tag between TAG-BEGIN and TAG-END.
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OVERLAY is the overlay added by `html-write-mode' for this tag."
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(overlay-put overlay 'face 'html-write-strong))
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;; Fix-me
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(defun html-write-img-tag-actions (tag-begin tag-end overlay)
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"Do actions for <img> tags for tag between TAG-BEGIN and TAG-END.
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OVERLAY is the overlay added by `html-write-mode' for this tag."
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(save-match-data
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(let ((here (point-marker))
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href)
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(save-restriction
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(narrow-to-region tag-begin tag-end)
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(goto-char tag-begin)
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(when (looking-at (rx (*? anything)
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(1+ space)
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"src=\""
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(submatch
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(+ (not (any "\"\n"))))
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"\""))
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(setq href (match-string-no-properties 1))))
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(when href
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(overlay-put overlay 'display (concat "image " href))
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(overlay-put overlay 'html-write-url href))
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(goto-char (point)))))
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(defun html-write-point-entered-echo (left entered)
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(let ((msg (get-char-property entered 'help-echo)))
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(when msg (message "%s" msg))))
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(defun html-write-a-tag-actions (tag-begin tag-end overlay)
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"Do actions for <a> tags for tag between TAG-BEGIN and TAG-END.
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OVERLAY is the overlay added by `html-write-mode' for this tag."
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(save-match-data
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(let ((here (point-marker))
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href)
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(save-restriction
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(narrow-to-region tag-begin tag-end)
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(goto-char tag-begin)
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(when (looking-at (rx (*? anything)
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(1+ space)
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"href=\""
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(submatch
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(+ (not (any "\"\n"))))
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"\""))
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(setq href (match-string-no-properties 1))))
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(when href
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(overlay-put overlay 'face 'html-write-link)
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(overlay-put overlay 'help-echo href)
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;; Fix-me: Seems like point-entered must be a text prop
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(overlay-put overlay 'point-entered 'html-write-point-entered-echo)
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(overlay-put overlay 'mouse-face 'highlight)
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(if (eq ?# (string-to-char href))
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(setq href (concat "file:///" buffer-file-name href))
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(when (file-exists-p href)
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(setq href (expand-file-name href))))
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(overlay-put overlay 'html-write-url href))
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(goto-char (point)))))
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(defun html-write-get-tag-ovl ()
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"Get tag overlay at current point."
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(catch 'ranges
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(dolist (ovl (overlays-at (point)))
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(let ((ranges (overlay-get ovl 'html-write)))
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(when ranges
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(throw 'ranges ovl))))))
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(defun html-write-toggle-current-tag ()
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"Toggle display of tag at current point."
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(interactive)
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(let* ((ovl (html-write-get-tag-ovl))
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(hiding-ranges (overlay-get ovl 'html-write))
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(invis (get-text-property (caar hiding-ranges) 'invisible))
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(ovl-start (overlay-start ovl))
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(ovl-end (overlay-end ovl)))
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(if invis
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(progn
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(overlay-put ovl 'html-face (overlay-get ovl 'face))
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(overlay-put ovl 'face 'highlight)
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(dolist (range hiding-ranges)
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(let ((start (car range))
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(end (cdr range)))
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(mumamo-with-buffer-prepared-for-jit-lock
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(put-text-property start end 'invisible nil)))))
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(delete-overlay ovl)
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(html-write-hide-tags ovl-start ovl-end))))
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(defun html-write-browse-link ()
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"Browse link in current tag."
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(interactive)
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(let* ((ovl (html-write-get-tag-ovl))
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(url (overlay-get ovl 'html-write-url)))
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(unless url
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(error "No link in this tag"))
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(browse-url url)
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))
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(defvar html-write-keymap
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(let ((map (make-sparse-keymap))
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keys)
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(define-key map [(control ?c) ?+] 'html-write-toggle-current-tag)
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(define-key map [(control ?c) ?!] 'html-write-browse-link)
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(define-key map [mouse-1] 'html-write-browse-link)
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(when (featurep 'mlinks)
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(setq keys (where-is-internal 'mlinks-goto mlinks-mode-map))
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(dolist (key keys)
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(define-key map key 'html-write-mlinks-goto))
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(setq keys (where-is-internal 'mlinks-goto-other-window mlinks-mode-map))
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(dolist (key keys)
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(define-key map key 'html-write-mlinks-goto-other-window))
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(setq keys (where-is-internal 'mlinks-goto-other-frame mlinks-mode-map))
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(dolist (key keys)
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(define-key map key 'html-write-mlinks-goto-other-frame))
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)
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map))
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(defun html-write-mlinks-goto ()
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"Goto link."
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(interactive)
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(html-write-mlinks-goto-1 'mlinks-goto))
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(defun html-write-mlinks-goto-other-window ()
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"Goto link in other window."
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(interactive)
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(html-write-mlinks-goto-1 'mlinks-goto-other-window))
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(defun html-write-mlinks-goto-other-frame ()
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"Goto link in other frame."
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(interactive)
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(html-write-mlinks-goto-1 'mlinks-goto-other-frame))
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(defun html-write-mlinks-goto-1 (goto-fun)
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(let* ((ovl (html-write-get-tag-ovl))
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(ovl-start (overlay-start ovl))
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(ovl-end (overlay-end ovl))
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(here (point-marker)))
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(goto-char ovl-start)
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(skip-chars-forward "^\"" ovl-end)
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(forward-char)
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(unless (funcall goto-fun) (goto-char here))
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))
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;;(html-write-make-hide-tags-regexp)
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(defun html-write-make-hide-tags-regexp ()
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"Make regexp used for finding tags to hide."
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;; fix-me: single tags. Fix-me: what did I mean??? Maybe < etc...
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(let ((tags-re
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(mapconcat 'identity
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(mapcar (lambda (elt)
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(if (stringp elt)
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elt
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(car elt)))
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html-write-tag-list)
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"\\|")))
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(concat
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"<\\(?1:"
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"\\(?:" tags-re "\\)"
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"\\)[^>]*>\\(?3:[^<]*\\)\\(?2:</\\1>\\)"
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)))
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(defvar html-write-pending-changes nil)
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(make-variable-buffer-local 'html-write-pending-changes)
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(put 'html-write-pending-changes 'permanent-local t)
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(defun html-write-hide-tags (start end)
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"Hide tags matching `html-write-tag-list' between START and END."
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;;(message "html-write-hide-tags %s %s" start end)
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(let ((here (point-marker))
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(buffer-name (buffer-file-name))
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(dbg nil))
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(save-restriction
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(widen)
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(goto-char start)
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(save-match-data
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(let ((hide-tags-regexp (html-write-make-hide-tags-regexp)))
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(when dbg (message "before search start=%s end=%s, point=%s" start end (point)))
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(while (re-search-forward hide-tags-regexp end t)
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(let* ((ovl (make-overlay (match-beginning 0) (match-end 0)
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nil t nil))
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(tag-fun (cadr (assoc (match-string-no-properties 1)
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html-write-tag-list)))
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hiding-ranges)
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;;(overlay-put ovl 'face 'font-lock-variable-name-face)
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(overlay-put ovl 'keymap html-write-keymap)
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(setq hiding-ranges
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(list (cons (1- (match-beginning 1)) (match-beginning 3))
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(cons (match-beginning 2) (match-end 2))))
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(overlay-put ovl 'html-write hiding-ranges)
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(mumamo-with-buffer-prepared-for-jit-lock
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(dolist (range hiding-ranges)
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(let ((start (car range))
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(end (cdr range)))
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(put-text-property start end 'invisible 'html-write)
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;; Fix-me: more careful rear-nonsticky?
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(put-text-property (1- end) end
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'rear-nonsticky '(invisible)))))
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;; Let tag-fun override
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(when tag-fun
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(funcall tag-fun (match-end 1) (match-beginning 3) ovl))
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)))))
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(goto-char here)))
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(defun html-write-reveal-tags (start end)
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"Reveal tags between START and END."
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(let ((here (point-marker)))
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(save-restriction
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(widen)
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(goto-char (point-min))
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(save-match-data
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(mumamo-with-buffer-prepared-for-jit-lock
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(remove-text-properties start
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end
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'(invisible html-write))
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(dolist (ovl (overlays-in start end))
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(when (overlay-get ovl 'html-write)
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(let ((end (overlay-end ovl)))
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(remove-list-of-text-properties (1- end) end '(rear-nonsticky))
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(delete-overlay ovl)))))))
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(goto-char here)))
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;;;###autoload
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(define-minor-mode html-write-mode
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"Minor mode for convenient display of some HTML tags.
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When this mode is on a tag in `html-write-tag-list' is displayed as
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the inner text of the tag with a face corresponding to the tag.
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By default for example <i>...</i> is displayed as italic and
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<a>...</a> is displayed as an underlined clickable link.
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Only non-nested tags are hidden. The idea is just that it should
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be easier to read and write, not that it should look as html
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rendered text.
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See the customization group `html-write' for more information about
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faces.
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The following keys are defined when you are on a tag handled by
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|
this minor mode:
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||
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|
\\{html-write-keymap}
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||
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||
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|
IMPORTANT: Most commands you use works also on the text that is
|
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|
hidden. The movement commands is an exception, but as soon as
|
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|
|
you edit the buffer you may also change the hidden parts.
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||
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||
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|
Hint: Together with `wrap-to-fill-column-mode' this can make it
|
||
|
|
easier to see what text you are actually writing in html parts of
|
||
|
|
a web file."
|
||
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|
:group 'html-write
|
||
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|
(if t
|
||
|
|
(if html-write-mode
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||
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|
(html-write-font-lock t)
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||
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|
(html-write-font-lock nil)
|
||
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|
(save-restriction
|
||
|
|
(widen)
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||
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|
(html-write-reveal-tags (point-min) (point-max))))))
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||
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|
(put html-write-mode 'permanent-local t)
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||
|
|
|
||
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|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
;;; Font lock
|
||
|
|
|
||
|
|
(defun html-write-jit-extend-after-change (start end old-len)
|
||
|
|
"For JIT lock extending.
|
||
|
|
Should be on `jit-lock-after-change-extend-region-functions'.
|
||
|
|
|
||
|
|
START, END and OLD-LEN are the parameters from after change."
|
||
|
|
(let ((our-ovls nil))
|
||
|
|
(dolist (ovl (append (overlays-in start end)
|
||
|
|
(overlays-at start)
|
||
|
|
nil))
|
||
|
|
;; Leave the overlays until re-fontification time, but note their extent.
|
||
|
|
(when (overlay-get ovl 'html-write)
|
||
|
|
(setq jit-lock-start (min jit-lock-start (overlay-start ovl)))
|
||
|
|
(setq jit-lock-end (max jit-lock-end (overlay-end ovl)))))))
|
||
|
|
|
||
|
|
|
||
|
|
(defun html-write-fontify (bound)
|
||
|
|
;;(message "html-write-fontify %s" bound)
|
||
|
|
(let (tag-ovl)
|
||
|
|
;;(save-match-data
|
||
|
|
(let* ((hide-tags-regexp (html-write-make-hide-tags-regexp))
|
||
|
|
(next-tag (re-search-forward hide-tags-regexp bound t))
|
||
|
|
(tag-beg (when next-tag (match-beginning 0)))
|
||
|
|
(tag-end (when next-tag (match-end 0)))
|
||
|
|
(tag-nam (when next-tag (match-string-no-properties 1)))
|
||
|
|
(tag-fun (when next-tag (cadr (assoc tag-nam html-write-tag-list))))
|
||
|
|
tag-hid
|
||
|
|
(old-start (next-single-char-property-change (max (point-min) (1- (point))) 'html-write nil bound)))
|
||
|
|
;;(message "here a old-start=%s, tag-beg/end=%s/%s" old-start tag-beg tag-end)
|
||
|
|
(setq tag-ovl (when next-tag (make-overlay tag-beg tag-end)))
|
||
|
|
(when old-start
|
||
|
|
;; Fix-me: maybe valid, perhaps better keep it then?
|
||
|
|
(let ((ovl (catch 'ovl
|
||
|
|
(dolist (o (append (overlays-at old-start)
|
||
|
|
(overlays-in old-start (1+ old-start))
|
||
|
|
nil))
|
||
|
|
(when (overlay-get o 'html-write)
|
||
|
|
(throw 'ovl o))))))
|
||
|
|
(when ovl ;; fix-me: there should be one...
|
||
|
|
;;(message "here b")
|
||
|
|
(mumamo-with-buffer-prepared-for-jit-lock
|
||
|
|
(remove-list-of-text-properties (overlay-start ovl) (overlay-end ovl) '(invisible html-write)))
|
||
|
|
(delete-overlay ovl))))
|
||
|
|
;;(html-write-hide-tags start end)
|
||
|
|
;;(message "here d, tag-ovl=%s" tag-ovl)
|
||
|
|
(when tag-ovl
|
||
|
|
(overlay-put tag-ovl 'face 'font-lock-variable-name-face)
|
||
|
|
(overlay-put tag-ovl 'keymap html-write-keymap)
|
||
|
|
(setq tag-hid
|
||
|
|
(list (cons (1- (match-beginning 1)) (match-beginning 3))
|
||
|
|
(cons (match-beginning 2) (match-end 2))))
|
||
|
|
(overlay-put tag-ovl 'html-write tag-hid)
|
||
|
|
(when tag-fun
|
||
|
|
(funcall tag-fun (match-end 1) (match-beginning 3) tag-ovl))
|
||
|
|
(mumamo-with-buffer-prepared-for-jit-lock
|
||
|
|
(dolist (range tag-hid)
|
||
|
|
(let ((start (car range))
|
||
|
|
(end (cdr range)))
|
||
|
|
(put-text-property start end 'invisible 'html-write)
|
||
|
|
;;(put-text-property start end 'html-write t)
|
||
|
|
;; Fix-me: more careful rear-nonsticky?
|
||
|
|
(put-text-property (1- end) end
|
||
|
|
'rear-nonsticky '(invisible)))))))
|
||
|
|
;;)
|
||
|
|
(when tag-ovl
|
||
|
|
(set-match-data (list (copy-marker (overlay-start tag-ovl))
|
||
|
|
(copy-marker (overlay-end tag-ovl))))
|
||
|
|
(goto-char (1+ (overlay-end tag-ovl)))
|
||
|
|
t)))
|
||
|
|
|
||
|
|
(defun html-write-font-lock (on)
|
||
|
|
;; See mlinks.el
|
||
|
|
(let* ((add-or-remove (if on 'font-lock-add-keywords 'font-lock-remove-keywords))
|
||
|
|
(fontify-fun 'html-write-fontify)
|
||
|
|
(args (list nil `(( ,fontify-fun ( 0 'html-write-base t ))))))
|
||
|
|
(when fontify-fun
|
||
|
|
(when on (setq args (append args (list t))))
|
||
|
|
(apply add-or-remove args)
|
||
|
|
(font-lock-mode -1)
|
||
|
|
(font-lock-mode 1)
|
||
|
|
)))
|
||
|
|
|
||
|
|
(provide 'html-write)
|
||
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
;;; html-write.el ends here
|