scripts/jquery.xmlattr.js

   1 /* -------------------------------------------------------------------------
   2
   3 jquery.xmlattr.js
   4 version 0.1
   5
   6 Dual licensed under the MIT and GPL licenses.
   7 ----------------------------------------------------------------------------
   8 Copyright (C) 2008 Malthe Borch <mborch@gmail.com>
   9 ----------------------------------------------------------------------------
  10 Permission is hereby granted, free of charge, to any person obtaining a copy
  11 of this software and associated documentation files (the "Software"), to deal
  12 in the Software without restriction, including without limitation the rights
  13 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14 copies of the Software, and to permit persons to whom the Software is
  15 furnished to do so, subject to the following conditions:
  16
  17 The above copyright notice and this permission notice shall be included in
  18 all copies or substantial portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26 THE SOFTWARE.
  27
  28 ------------------------------------------------------------------------- */
  29
  30 (function($) {
  31   var known_namespaces = [];
  32   var reverse_prefix_map = {};
  33
  34   $.fn.xmlattr = function(name) {
  35     // parse name using James Clark notation, e.g. "{ns}name"
  36     var params = name.substring(1).split('}');
  37     if (params.length == 1) return $(this).attr(name);
  38     var ns = params[0];
  39     var name = params[1];
  40
  41     // for each namespace uri, we have to find out what the current
  42     // prefix assignment is in the document; if the namespace is not
  43     // known, traverse parent chain until we find the corresponding
  44     // namespace prefix mapping attribute
  45     if ($.inArray(ns, known_namespaces) == -1) {
  46       var items = $(this).parents().andSelf();
  47       for (var i=0; i<items.length; i++) {
  48         var attributes = items[i].attributes;
  49         for (var j=0; j<attributes.length; j++) {
  50           var p = attributes[j];
  51           var k = p.name.indexOf("xmlns:");
  52           if (k == 0) {
  53             var prefix = p.name.substring(6);
  54             known_namespaces.push(p.value);
  55             reverse_prefix_map[p.value] = prefix;
  56             if (ns == p.value) {
  57               return $(this).attr(prefix+":"+name);
  58             }
  59           }
  60         }
  61       }
  62     } else {
  63       var prefix = reverse_prefix_map[ns];
  64       return $(this).attr(prefix+":"+name);
  65     }
  66   };
  67  })(jQuery);