emels/static/admin/js/prepopulate.js

   1 /*global URLify*/
   2 (function($) {
   3     'use strict';
   4     $.fn.prepopulate = function(dependencies, maxLength, allowUnicode) {
   5         /*
   6             Depends on urlify.js
   7             Populates a selected field with the values of the dependent fields,
   8             URLifies and shortens the string.
   9             dependencies - array of dependent fields ids
  10             maxLength - maximum length of the URLify'd string
  11             allowUnicode - Unicode support of the URLify'd string
  12         */
  13         return this.each(function() {
  14             var prepopulatedField = $(this);
  15
  16             var populate = function() {
  17                 // Bail if the field's value has been changed by the user
  18                 if (prepopulatedField.data('_changed')) {
  19                     return;
  20                 }
  21
  22                 var values = [];
  23                 $.each(dependencies, function(i, field) {
  24                     field = $(field);
  25                     if (field.val().length > 0) {
  26                         values.push(field.val());
  27                     }
  28                 });
  29                 prepopulatedField.val(URLify(values.join(' '), maxLength, allowUnicode));
  30             };
  31
  32             prepopulatedField.data('_changed', false);
  33             prepopulatedField.change(function() {
  34                 prepopulatedField.data('_changed', true);
  35             });
  36
  37             if (!prepopulatedField.val()) {
  38                 $(dependencies.join(',')).keyup(populate).change(populate).focus(populate);
  39             }
  40         });
  41     };
  42 })(django.jQuery);