Refactor parts of the NTP to split things into more managable chunks....

chrome/browser/resources/i18n_template.js

-/**
- * @fileoverview This is a simple template engine inspired by JsTemplates
- * optimized for i18n.
- *
- * It currently supports two handlers:
- *
- *   * i18n-content which sets the textContent of the element
- *
- *     <span i18n-content="myContent"></span>
- *     i18nTemplate.process(element, {'myContent': 'Content'});
- *
- *   * i18n-values is a list of attribute-value or property-value pairs.
- *     Properties are prefixed with a '.' and can contain nested properties.
- *
- *     <span i18n-values="title:myTitle;.style.fontSize:fontSize"></span>
- *     i18nTemplate.process(element, {
- *       'myTitle': 'Title',
- *       'fontSize': '13px'
- *     });
- */
-
-var i18nTemplate = (function() {
-  /**
-   * This provides the handlers for the templating engine. The key is used as
-   * the attribute name and the value is the function that gets called for every
-   * single node that has this attribute.
-   * @type {Object}
-   */
-  var handlers = {
-    /**
-     * This handler sets the textContent of the element.
-     */
-    'i18n-content': function(element, attributeValue, obj) {
-      element.textContent = obj[attributeValue];
-    },
-
-    /**
-     * This is used to set HTML attributes and DOM properties,. The syntax is:
-     *   attributename:key;
-     *   .domProperty:key;
-     *   .nested.dom.property:key
-     */
-    'i18n-values': function(element, attributeValue, obj) {
-      var parts = attributeValue.replace(/\s/g, '').split(/;/);
-      for (var j = 0; j < parts.length; j++) {
-        var a = parts[j].match(/^([^:]+):(.+)$/);
-        if (a) {
-          var propName = a[1];
-          var propExpr = a[2];
-
-          // Ignore missing properties
-          if (propExpr in obj) {
-            var value = obj[propExpr];
-            if (propName.charAt(0) == '.') {
-              var path = propName.slice(1).split('.');
-              var object = element;
-              while (object && path.length > 1) {
-                object = object[path.shift()];
-              }
-              if (object) {
-                object[path] = value;
-                // In case we set innerHTML (ignoring others) we need to
-                // recursively check the content
-                if (path == 'innerHTML') {
-                  process(element, obj);
-                }
-              }
-            } else {
-              element.setAttribute(propName, value);
-            }
-          } else {
-            console.warn('i18n-values: Missing value for "' + propExpr + '"');
-          }
-        }
-      }
-    }
-  };
-
-  var attributeNames = [];
-  for (var key in handlers) {
-    attributeNames.push(key);
-  }
-  var selector = '[' + attributeNames.join('],[') + ']';
-
-  /**
-   * Processes a DOM tree with the {@code obj} map.
-   */
-  function process(node, obj) {
-    var elements = node.querySelectorAll(selector);
-    for (var element, i = 0; element = elements[i]; i++) {
-      for (var j = 0; j < attributeNames.length; j++) {
-        var name = attributeNames[j];
-        var att = element.getAttribute(name);
-        if (att != null) {
-          handlers[name](element, att, obj);
-        }
-      }
-    }
-  }
-
-  return {
-    process: process
-  };
-})();