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Diffstat (limited to 'webapps/qooxdoo-0.6.5-sdk/frontend/framework/source/class/qx/lang/Function.js')
-rw-r--r-- | webapps/qooxdoo-0.6.5-sdk/frontend/framework/source/class/qx/lang/Function.js | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/webapps/qooxdoo-0.6.5-sdk/frontend/framework/source/class/qx/lang/Function.js b/webapps/qooxdoo-0.6.5-sdk/frontend/framework/source/class/qx/lang/Function.js new file mode 100644 index 0000000000..efeccbd592 --- /dev/null +++ b/webapps/qooxdoo-0.6.5-sdk/frontend/framework/source/class/qx/lang/Function.js @@ -0,0 +1,126 @@ +/* ************************************************************************ + + 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 helper methods operatinf on functions. + */ +qx.OO.defineClass("qx.lang.Function"); + + + + + +/* +--------------------------------------------------------------------------- + SIMPLE RETURN METHODS +--------------------------------------------------------------------------- +*/ + +/** + * Simply return true. + * + * @return {Boolean} Always returns true. + */ +qx.lang.Function.returnTrue = function() { + return true; +}; + + +/** + * Simply return false. + * + * @return {Boolean} Always returns false. + */ + +qx.lang.Function.returnFalse = function() { + return false; +}; + + +/** + * Simply return null. + * + * @return {var} Always returns null. + */ + +qx.lang.Function.returnNull = function() { + return null; +}; + + +/** + * Return "this". + * + * @return {Object} Always returns "this". + */ +qx.lang.Function.returnThis = function() { + return this; +}; + + +/** + * Used to return a refernce to an singleton. Classes which should act as singletons can use this + * function to implement the "getInstance" methods. + * + * @returns {Object} Singleton instance of the class this method is bound to. + */ +qx.lang.Function.returnInstance = function() +{ + if (!this._instance) + { + this._instance = new this; + + /* + if (this._instance.debug) { + this._instance.debug("Created..."); + }*/ + } + + return this._instance; +}; + + +/** + * Simply return 0. + * + * @return {Number} Always returns 0. + */ + +qx.lang.Function.returnZero = function() { + return 0; +}; + + +/** + * Simply return a negative index (-1). + * + * @return {Number} Always returns -1. + */ + +qx.lang.Function.returnNegativeIndex = function() { + return -1; +}; |