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_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
  19 enc_attr = (txt) ->
  20         return txt.replace enc_attr_regex, (match, amp, quote) ->
  21                 return '&amp;' if (amp)
  22                 return '&quot;' if (quote)
  23                 return '&nbsp;'
  24
  25 void_elements = {
  26         area: true
  27         base: true
  28         br: true
  29         col: true
  30         embed: true
  31         hr: true
  32         img: true
  33         input: true
  34         keygen: true
  35         link: true
  36         meta: true
  37         param: true
  38         source: true
  39         track: true
  40         wbr: true
  41 }
  42 dom_to_html = (dom) ->
  43         ret = ''
  44         for el in dom
  45                 switch el.type
  46                         when wheic_parser.TYPE_TAG
  47                                 ret += '<' + el.name
  48                                 attr_keys = []
  49                                 for k of el.attrs
  50                                         attr_keys.unshift k
  51                                 #attr_keys.sort()
  52                                 for k in attr_keys
  53                                         ret += " #{k}"
  54                                         if el.attrs[k].length > 0
  55                                                 ret += "=\"#{enc_attr el.attrs[k]}\""
  56                                 ret += '>'
  57                                 unless void_elements[el.name]
  58                                         if el.children.length
  59                                                 ret += dom_to_html el.children
  60                                         ret += "</#{el.name}>"
  61                         when wheic_parser.TYPE_TEXT
  62                                 ret += el.text
  63                         when wheic_parser.TYPE_COMMENT
  64                                 ret += "<!--#{el.text}-->"
  65                         when wheic_parser.TYPE_DOCTYPE
  66                                 ret += "<!DOCTYPE #{el.name}"
  67                                 if el.public_identifier? and el.public_identifier.length > 0
  68                                         ret += " \"#{el.public_identifier}\""
  69                                 if el.system_identifier? and el.system_identifier.length > 0
  70                                         ret += " \"#{el.system_identifier}\""
  71                                 ret += ">\n"
  72         return ret
  73
  74 wysiwyg = (el, options = {}) ->
  75         opt_fragment = options.fragment ? true
  76         parser_opts = {}
  77         if opt_fragment
  78                 parser_opts.fragment = 'body'
  79         editor_instance = dom: wheic_parser.parse(el.value, parser_opts)
  80         # el.value = dom_to_html dom
  81         return editor_instance
  82
  83 window.wheic = {
  84         wysiwyg: wysiwyg
  85         dom_to_html: dom_to_html
  86 }
  87
  88 # test in browser: wheic(document.getElementsByTagName('textarea')[0])