Lift Framework example source code file (liftYUI.js)

This example Lift Framework source code file (liftYUI.js) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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The Lift Framework liftYUI.js source code

/* 
 * Copyright 2008 WorldWide Conferencing, LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Lift helpers. The YUI dependencies are: yahoo.js, dom.js, connection.js, json.js
 */
( function() {

	YAHOO.namespace("lift");

	YAHOO.lift.toggle = function(first, second) {
		this.lastToggle = 0 == this.lastToggle ? 1 : 0;
		switch (this.lastToggle) {
		case 1:
			YAHOO.util.Dom.setStyle(first, 'display', 'block');
			YAHOO.util.Dom.setStyle(second, 'display', 'none');
			break;
		case 0:
			YAHOO.util.Dom.setStyle(first, 'display', 'none');
			YAHOO.util.Dom.setStyle(second, 'display', 'block');
			break;
		}
	}

	/**
	 * Evaluates a JavaScript. Inspired from JQuery.
	 */
	YAHOO.lift.eval = function(text) {
		isJS = (text.getResponseHeader['Content-Type']).indexOf('/javascript') > -1;
		isJson = (text.getResponseHeader['Content-Type']).indexOf('/json') > -1;
		content = text.responseText;
		result = content;
		if (isJS) {
			head = document.getElementsByTagName("head")[0]
					|| document.documentElement;
			script = document.createElement("script");
			script.type = "text/javascript";
			if (script.text == undefined) {
				script.appendChild(document.createTextNode(content));
			} else {
				script.text = content;
			}
			head.appendChild(script);
			head.removeChild(script);
		} else if (isJSON) {
			result = YAHOO.lang.JSON.parse(content);
		}
		return result;
	}

	/**
	 * Converts a form object denominated by formId into a JSON object
	 */
	YAHOO.lift.formToJSON = function(formId) {
		qs = YAHOO.util.Connect.setForm(formId, false);
		parts = qs.split("&");
		json = "";
		for (i = 0; i < parts.length; i++) {
			nvp = parts[i].split("=");
			json += (i > 0) ? "," : "";
			json += "\"" + decodeURIComponent(nvp[0]) + "\": \""
					+ decodeURIComponent(nvp[1]) + "\"";
		}
		return YAHOO.lang.JSON.parse("{" + json + "}");
	}

	/**
	 * Converts a a simple JSON object into a URL query string
	 */
	YAHOO.lift.simpleJsonToQS = function(obj) {
		s = "";
		for (k in obj) {
			s += "&" + k + "=" + encodeURIComponent(obj[k]);
		}
		return s.substring(1);
	}

	YAHOO.lift.buildURI = function(uri, queryString) {
		hasParam = uri.indexOf("?") > -1;
		sep = (hasParam) ? "&" : "?";
		return uri + sep + queryString
	}
})();