editor.coffee

   1 # Copyright 2015 Jason Woofenden
   2 # This file implements an WYSIWYG editor in the browser (no contenteditable)
   3 #
   4 # This program is free software: you can redistribute it and/or modify it under
   5 # the terms of the GNU Affero General Public License as published by the Free
   6 # Software Foundation, either version 3 of the License, or (at your option) any
   7 # later version.
   8 #
   9 # This program is distributed in the hope that it will be useful, but WITHOUT
  10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11 # FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
  12 # details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # encode text so it can be safely placed inside an html attribute
  18 enc_attr = (txt) ->
  19         # FIXME implement
  20         return txt
  21
  22 void_elements = {
  23         area: true
  24         base: true
  25         br: true
  26         col: true
  27         embed: true
  28         hr: true
  29         img: true
  30         input: true
  31         keygen: true
  32         link: true
  33         meta: true
  34         param: true
  35         source: true
  36         track: true
  37         wbr: true
  38 }
  39 dom_to_html = (dom) ->
  40         ret = ''
  41         for el in dom
  42                 switch el.type
  43                         when wheic_parser.TYPE_TAG
  44                                 ret += '<' + el.name
  45                                 attr_keys = []
  46                                 for k of el.attrs
  47                                         attr_keys.push k
  48                                 attr_keys.sort()
  49                                 for k in attr_keys
  50                                         ret += " #{k}=\"#{enc_attr el.attrs[k]}\""
  51                                 ret += '>'
  52                                 unless ret.name in void_elements
  53                                         if el.children.length
  54                                                 ret += dom_to_html el.children
  55                                         ret += "</#{el.name}>"
  56                         when wheic_parser.TYPE_TEXT
  57                                 ret += el.text
  58                         when wheic_parser.TYPE_COMMENT
  59                                 ret += "<!--#{el.text}-->"
  60                         when wheic_parser.TYPE_DOCTYPE
  61                                 ret += "<!DOCTYPE #{el.name}"
  62                                 if el.public_identifier? and el.public_identifier.length > 0
  63                                         ret += " \"#{el.public_identifier}\""
  64                                 if el.system_identifier? and el.system_identifier.length > 0
  65                                         ret += " \"#{el.system_identifier}\""
  66         return ret
  67
  68 make_wysiwyg = (el, options = {}) ->
  69         opt_fragment = options.fragment ? true
  70         parser_opts = {}
  71         if opt_fragment
  72                 parser_opts.fragment = 'body'
  73         dom = wheic_parser.parse(el.value, parser_opts)
  74         el.value = dom_to_html dom
  75
  76 window.wheic = make_wysiwyg
  77
  78 # test in browser: wheic(document.getElementsByTagName('textarea')[0])