summaryrefslogtreecommitdiffstats
path: root/chrome/browser/resources/i18n_template.js
diff options
context:
space:
mode:
Diffstat (limited to 'chrome/browser/resources/i18n_template.js')
-rw-r--r--chrome/browser/resources/i18n_template.js91
1 files changed, 91 insertions, 0 deletions
diff --git a/chrome/browser/resources/i18n_template.js b/chrome/browser/resources/i18n_template.js
new file mode 100644
index 0000000..7a367f7
--- /dev/null
+++ b/chrome/browser/resources/i18n_template.js
@@ -0,0 +1,91 @@
+/**
+ * @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];
+ 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;
+ }
+ } else {
+ element.setAttribute(propName, value);
+ }
+ }
+ }
+ }
+ };
+
+ var attributeNames = [];
+ for (var key in handlers) {
+ attributeNames.push(key);
+ }
+ var selector = '[' + attributeNames.join('],[') + ']';
+
+ return {
+ /**
+ * Processes a DOM tree with the {@code obj} map.
+ */
+ process: function(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);
+ }
+ }
+ }
+ }
+ };
+})();