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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2007 1&1 Internet AG, Germany, http://www.1and1.org
License:
LGPL: http://www.gnu.org/licenses/lgpl.html
EPL: http://www.eclipse.org/org/documents/epl-v10.php
See the LICENSE file in the project's top-level directory for details.
Authors:
* Sebastian Werner (wpbasti)
* Andreas Ecker (ecker)
************************************************************************ */
/* ************************************************************************
#module(core)
************************************************************************ */
/**
* Collection of validation methods.
*
* All methods use the strict comparison operators as all modern
* browsers (needs support for JavaScript 1.3) support this.
*
* http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Operators:Comparison_Operators
*/
qx.OO.defineClass("qx.util.Validation");
/**
* Whether a value is valid. Invalid values are:
* <ul>
* <li>undefined</li>
* <li>null</li>
* <li>"" (empty string)</li>
* <li>Nan (not a number)</li>
* <li>false</li>
* </ul>
* All other values are considered valid.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValid = function(v)
{
switch(typeof v)
{
case "undefined":
return false;
case "object":
return v !== null;
case "string":
return v !== "";
case "number":
return !isNaN(v);
case "function":
case "boolean":
return true;
}
return false;
};
/**
* Whether a value is invalid. Invalid values are:
* <ul>
* <li>undefined</li>
* <li>null</li>
* <li>"" (empty string)</li>
* <li>Nan (not a number)</li>
* <li>false</li>
* </ul>
* All other values are considered valid.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is invalid
*/
qx.util.Validation.isInvalid = function(v)
{
switch(typeof v)
{
case "undefined":
return true;
case "object":
return v === null;
case "string":
return v === "";
case "number":
return isNaN(v);
case "function":
case "boolean":
return false;
}
return true;
};
/**
* Whether a value is a valid number. Valid numbers are:
* <ul>
* <li>type is number</li>
* <li>not NaN</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidNumber = function(v) {
return typeof v === "number" && !isNaN(v);
};
/**
* Whether a value is an invalid number.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidNumber = function(v) {
return typeof v !== "number" || isNaN(v);
};
/**
* Whether a value is valid string. Valid strings are:
* <ul>
* <li>type is string</li>
* <li>not an empty string</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidString = function(v) {
return typeof v === "string" && v !== "";
};
/**
* Whether a value is an invalid string.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidString = function(v) {
return typeof v !== "string" || v === "";
};
/**
* Whether a value is a valid array. Valid arrays are:
* <ul>
* <li>type is object</li>
* <li>instance is Array</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidArray = function(v) {
return typeof v === "object" && v !== null && v instanceof Array;
};
/**
* Whether a value is an invalid array.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidArray = function(v) {
return typeof v !== "object" || v === null || !(v instanceof Array);
};
/**
* Whether a value is a valid object. Valid object are:
* <ul>
* <li>type is object</li>
* <li>instance != Array</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidObject = function(v) {
return typeof v === "object" && v !== null && !(v instanceof Array);
}
/**
* Whether a value is an invalid object.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidObject = function(v) {
return typeof v !== "object" || v === null || v instanceof Array;
};
/**
* Whether a value is a valid DOM node. Valid nodes are:
* <ul>
* <li>type is object</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidNode = function(v) {
return typeof v === "object" && v !== null;
};
/**
* Whether a value is an invalid node.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidNode = function(v) {
return typeof v !== "object" || v === null;
};
/**
* Whether a value is valid DOM element number. Valid elements are:
* <ul>
* <li>type is object</li>
* <li>v.nodeType === 1</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidElement = function(v) {
return typeof v === "object" && v !== null || v.nodeType !== 1;
};
/**
* Whether a value is not a DOM element.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidElement = function(v) {
return typeof v !== "object" || v === null || v.nodeType !== 1;
};
/**
* Whether a value is a function.
* <ul>
* <li>type is function</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidFunction = function(v) {
return typeof v === "function";
};
/**
* Whether a value is not a function.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidFunction = function(v) {
return typeof v !== "function";
};
/**
* Whether a value is a boolean. Valid booleans are:
* <ul>
* <li>type is boolean</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidBoolean = function(v) {
return typeof v === "boolean";
};
/**
* Whether a value is not boolean.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidBoolean = function(v) {
return typeof v !== "boolean";
};
/**
* Whether a value is valid a non empty string or a valid number. Valid values are:
* <ul>
* <li>type is string or number</li>
* <li>values is not "" or NaN</li>
* </ul>
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isValidStringOrNumber = function(v)
{
switch(typeof v)
{
case "string":
return v !== "";
case "number":
return !isNaN(v);
}
return false;
};
/**
* Whether a value not a valid string or number.
*
* @param v {var} the value to validate.
* @return {Boolean} whether the variable is valid
*/
qx.util.Validation.isInvalidStringOrNumber = function(v)
{
switch(typeof v)
{
case "string":
return v === "";
case "number":
return isNaN(v);
}
return false;
};
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