src/wlxml/extensions/edumed/edumed.js

   1 define(function(require) {
   2
   3 'use strict';
   4
   5 var _ = require('libs/underscore'),
   6     orderExerciseTemplate = require('libs/text!./order.xml');
   7
   8 var Item = function(node, exerciseNode) {
   9     Object.defineProperty(this, 'text', {
  10         get: function() {
  11             /* globals Node */
  12             var firstNode = node.contents()[0];
  13             if(firstNode && firstNode.nodeType === Node.TEXT_NODE) {
  14                 return firstNode.getText();
  15             }
  16             return '';
  17         }
  18     });
  19     this.node = node;
  20     this.exerciseNode = exerciseNode;
  21 };
  22 _.extend(Item.prototype, {
  23     setText: function(text) {
  24         /* globals Node */
  25         var contents = this.node.contents();
  26         if(contents.length === 1 && contents[0].nodeType === Node.TEXT_NODE) {
  27             contents[0].setText(text);
  28         } else {
  29             contents.forEach(function(childNode) {
  30                 childNode.detach();
  31             });
  32             contents.append({text: text});
  33         }
  34     },
  35     remove: function() {
  36         this.node.detach();
  37     },
  38     getAnswer: function() {
  39         var toret = parseInt(this.node.getAttr('answer'), 10);
  40         if(_.isNaN(toret)) {
  41             toret = 1;
  42         }
  43         return toret;
  44     },
  45     setAnswer: function(answer) {
  46         answer = parseInt(answer, 10);
  47         var prev = answer;
  48         if(!_.isNumber(answer)) {
  49             return;
  50         }
  51
  52         this.exerciseNode.object.getItems()
  53             .sort(function(item1, item2) {
  54                 if(item1.getAnswer() > item2.getAnswer()) {
  55                     return 1;
  56                 }
  57                 return -1;
  58             })
  59             .some(function(item) {
  60                 if(item.getAnswer() === prev && !item.node.sameNode(this.node)) {
  61                     item.node.setAttr('answer', prev+1);
  62                     prev = prev + 1;
  63                 }
  64             }.bind(this));
  65         this.node.setAttr('answer', answer);
  66
  67     }
  68 });
  69
  70 var isItemsList = function(node) {
  71     return node.is('list.orderable');
  72 };
  73
  74
  75 var extension = {wlxmlClass: {'exercise.order': {
  76     methods: {
  77         isContextRoot: function(node) {
  78             return this.object.isItemNode(node) || this.sameNode(node);
  79         },
  80         getItems: function() {
  81             var toret = [],
  82                 exerciseNode = this;
  83
  84             this.contents().some(function(node) {
  85                 if(isItemsList(node)) {
  86                     node.contents()
  87                         .filter(function(node) {
  88                             return node.is('item.answer');
  89                         })
  90                         .forEach(function(node) {
  91                             toret.push(new Item(node, exerciseNode));
  92                         });
  93                     return true;
  94                 }
  95             });
  96             return toret;
  97         },
  98         isItemNode: function(node) {
  99             var list;
 100             if(!node) {
 101                 return;
 102             }
 103             this.contents().some(function(node) {
 104                 if(isItemsList(node)) {
 105                     list = node;
 106                     return true;
 107                 }
 108             });
 109             return list && list.sameNode(node.parent());
 110         },
 111         getDescription: function() {
 112             var toret = [];
 113             this.contents().some(function(node) {
 114                 if(isItemsList(node)) {
 115                    return true;
 116                 }
 117                 toret.push(node);
 118             });
 119             return toret;
 120         }
 121     },
 122     transformations: {
 123         addItem: function(text) {
 124             var toret;
 125             this.contents().some(function(node) {
 126                 if(isItemsList(node)) {
 127                     var itemNode = this.document.createDocumentNode({tagName: 'div', attrs: {'class': 'item.answer', answer: this.object.getItems().length+1}});
 128                     toret = itemNode.append({text: text});
 129                     node.append(itemNode);
 130                     return true;
 131                 }
 132             }.bind(this));
 133             return toret;
 134         },
 135         setDescription: function(text) {
 136             this.contents().some(function(node) {
 137                 var textNode;
 138                 if(node.is('p')) {
 139                     textNode = node.contents()[0];
 140                     if(!(textNode && textNode.nodeType === Node.TEXT_NODE)) {
 141                         node.prepend({text:text});
 142                     } else {
 143                         textNode.setText(text);
 144                     }
 145                     return true;
 146                 }
 147             });
 148         }
 149     }
 150 }}};
 151
 152 extension.document = {
 153     methods: {
 154          edumedCreateExerciseNode: function(klass) {
 155             void(klass);
 156             return this.createDocumentNode(orderExerciseTemplate);
 157          }
 158     }
 159 };
 160
 161 return extension;
 162
 163 });