Copying serializer code to VisualEditor extension

modules/es/es.AnnotationSerializer.js

@@ -0,0 +1,60 @@
+/**
+ * Creates an annotation renderer object.
+ * 
+ * @class
+ * @constructor
+ * @property annotations {Object} List of annotations to be applied
+ */
+es.AnnotationSerializer = function() {
+	this.annotations = {};
+};
+
+/* Static Methods */
+
+/**
+ * Adds a set of annotations to be inserted around a range of text.
+ * 
+ * Insertions for the same range will be nested in order of declaration.
+ * @example
+ *     stack = new es.AnnotationSerializer();
+ *     stack.add( new es.Range( 1, 2 ), '[', ']' );
+ *     stack.add( new es.Range( 1, 2 ), '{', '}' );
+ *     // Outputs: "a[{b}]c"
+ *     console.log( stack.render( 'abc' ) );
+ * 
+ * @param range {es.Range} Range to insert text around
+ * @param pre {String} Text to insert before range
+ * @param post {String} Text to insert after range
+ */
+es.AnnotationSerializer.prototype.add = function( range, pre, post ) {
+	// TODO: Once we are using Range objects, we should do a range.normalize(); here
+	if ( !( range.start in this.annotations ) ) {
+		this.annotations[range.start] = [pre];
+	} else {
+		this.annotations[range.start].push( pre );
+	}
+	if ( !( range.end in this.annotations ) ) {
+		this.annotations[range.end] = [post];
+	} else {
+		this.annotations[range.end].unshift( post );
+	}
+};
+
+/**
+ * Renders annotations into text.
+ * 
+ * @param text {String} Text to apply annotations to
+ * @returns {String} Wrapped text
+ */
+es.AnnotationSerializer.prototype.render = function( text ) {
+	var out = '';
+	for ( var i = 0, length = text.length; i <= length; i++ ) {
+		if ( i in this.annotations ) {
+			out += this.annotations[i].join( '' );
+		}
+		if ( i < length ) {
+			out += text[i];
+		}
+	}
+	return out;
+};