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- // Copyright (c) 2010 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
-
- /**
- * NOTE: The use of this file is deprecated. Use i18n_template2.js instead.
- *
- * @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 handler adds options to a select element.
- */
- 'i18n-options': function(element, attributeValue, obj) {
- var options = obj[attributeValue];
- options.forEach(function(values) {
- var option = typeof values == 'string' ? new Option(values) :
- new Option(values[1], values[0]);
- element.appendChild(option);
- });
- },
-
- /**
- * 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
- };
- })();
-