Struts example source code file (inputtransferselect.js)

This example Struts source code file (inputtransferselect.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.

Java - Struts tags/keywords

option, option, regexp, regexp

The Struts inputtransferselect.js source code

/*
 * $Id: inputtransferselect.js 932721 2010-04-10 13:52:09Z lukaszlenart $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

function addOption(objTextBox, objTargetElement) {
    var value = objTextBox.value;
    if(value != null && value != '') {
        objTargetElement.options[objTargetElement.options.length] = new Option(value, value);
        objTextBox.value = '';
    }
}

function removeOptions(objTargetElement) {
    var i = 0;
    while(objTargetElement.options.length > i) {
        if (objTargetElement.options[i].selected) {
            objTargetElement.options.remove(i);
        } else {
            i++;
        }
    }
}

function removeAllOptions(objTargetElement) {
    while(objTargetElement.options.length != 0) {
        objTargetElement.options[0] = null;
    }
}

function selectAllOptionsExceptSome(objTargetElement, type, ptn) {
    var test = compile(ptn);
    for (var i = 0; i < objTargetElement.length; i++) {
        var opt = objTargetElement.options[i];
        if ((type == 'key' && !test(opt.value)) ||
              (type == 'text' && !test(opt.text))) {
            opt.selected = true;
        } else {
            opt.selected = false;
        }    
    }
    return false;
}

function compile(ptn) {
    if (ptn != undefined) {
    	if (ptn == '' || !window.RegExp) {
            return function(val) { return val == ptn; }
        } else {
            var reg = new RegExp(ptn);
            return function (val) {
                if (val == '') { // ignore empty option added by template
                	return true;
                }
            	return reg.test(val); }
        }
    }
    return function(val) { return false; }
}

function selectAllOptions(objTargetElement) {
    for (var i = 0; i < objTargetElement.length; i++) {
        if (objTargetElement.options[i].value != '') {
            objTargetElement.options[i].selected = true;    
        }    
    }
    return false;
}

function moveOptionUp(objTargetElement, type, ptn) {
	var test = compile(ptn);
	for (i=0; i<objTargetElement.length; i++) {
		if (objTargetElement[i].selected) {
			var v;
			if (i != 0 && !objTargetElement[i-1].selected) {
		    	if (type == 'key') {
		    		v = objTargetElement[i-1].value
		    	}
		    	else {
		    		v = objTargetElement[i-1].text;
		    	}
				if (!test(v)) {
					swapOptions(objTargetElement,i,i-1);
				}
		    }
		}
	}
}

function moveOptionDown(objTargetElement, type, ptn) {
	var test = compile(ptn);
	for (i=(objTargetElement.length-1); i>= 0; i--) {
		if (objTargetElement[i].selected) {
			var v;
			if ((i != (objTargetElement.length-1)) && !objTargetElement[i+1].selected) {
		    	if (type == 'key') {
		    		v = objTargetElement[i].value
		    	}
		    	else {
		    		v = objTargetElement[i].text;
		    	}
				if (!test(v)) {
					swapOptions(objTargetElement,i,i+1);
				}
		    }
		}
	}
}

function swapOptions(objTargetElement, first, second) {
	var opt = objTargetElement.options;
	var temp = new Option(opt[first].text, opt[first].value, opt[first].defaultSelected, opt[first].selected);
	var temp2= new Option(opt[second].text, opt[second].value, opt[second].defaultSelected, opt[second].selected);
	opt[first] = temp2;
	opt[second] = temp;
}