-/*!
- * Ext JS Library 3.3.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-/**
- * @class Ext.util.Functions
- * @singleton
- */
-Ext.util.Functions = {
- /**
- * Creates an interceptor function. The passed function is called before the original one. If it returns false,
- * the original one is not called. The resulting function returns the results of the original function.
- * The passed function is called with the parameters of the original function. Example usage:
- * <pre><code>
-var sayHi = function(name){
- alert('Hi, ' + name);
-}
-
-sayHi('Fred'); // alerts "Hi, Fred"
-
-// create a new function that validates input without
-// directly modifying the original function:
-var sayHiToFriend = Ext.createInterceptor(sayHi, function(name){
- return name == 'Brian';
-});
-
-sayHiToFriend('Fred'); // no alert
-sayHiToFriend('Brian'); // alerts "Hi, Brian"
- </code></pre>
- * @param {Function} origFn The original function.
- * @param {Function} newFn The function to call before the original
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the passed function is executed.
- * <b>If omitted, defaults to the scope in which the original function is called or the browser window.</b>
- * @return {Function} The new function
- */
- createInterceptor: function(origFn, newFn, scope) {
- var method = origFn;
- if (!Ext.isFunction(newFn)) {
- return origFn;
- }
- else {
- return function() {
- var me = this,
- args = arguments;
- newFn.target = me;
- newFn.method = origFn;
- return (newFn.apply(scope || me || window, args) !== false) ?
- origFn.apply(me || window, args) :
- null;
- };
- }
- },
-
- /**
- * Creates a delegate (callback) that sets the scope to obj.
- * Call directly on any function. Example: <code>Ext.createDelegate(this.myFunction, this, [arg1, arg2])</code>
- * Will create a function that is automatically scoped to obj so that the <tt>this</tt> variable inside the
- * callback points to obj. Example usage:
- * <pre><code>
-var sayHi = function(name){
- // Note this use of "this.text" here. This function expects to
- // execute within a scope that contains a text property. In this
- // example, the "this" variable is pointing to the btn object that
- // was passed in createDelegate below.
- alert('Hi, ' + name + '. You clicked the "' + this.text + '" button.');
-}
-
-var btn = new Ext.Button({
- text: 'Say Hi',
- renderTo: Ext.getBody()
-});
-
-// This callback will execute in the scope of the
-// button instance. Clicking the button alerts
-// "Hi, Fred. You clicked the "Say Hi" button."
-btn.on('click', Ext.createDelegate(sayHi, btn, ['Fred']));
- </code></pre>
- * @param {Function} fn The function to delegate.
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the function is executed.
- * <b>If omitted, defaults to the browser window.</b>
- * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
- * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
- * if a number the args are inserted at the specified position
- * @return {Function} The new function
- */
- createDelegate: function(fn, obj, args, appendArgs) {
- if (!Ext.isFunction(fn)) {
- return fn;
- }
- return function() {
- var callArgs = args || arguments;
- if (appendArgs === true) {
- callArgs = Array.prototype.slice.call(arguments, 0);
- callArgs = callArgs.concat(args);
- }
- else if (Ext.isNumber(appendArgs)) {
- callArgs = Array.prototype.slice.call(arguments, 0);
- // copy arguments first
- var applyArgs = [appendArgs, 0].concat(args);
- // create method call params
- Array.prototype.splice.apply(callArgs, applyArgs);
- // splice them in
- }
- return fn.apply(obj || window, callArgs);
- };
- },
-
- /**
- * Calls this function after the number of millseconds specified, optionally in a specific scope. Example usage:
- * <pre><code>
-var sayHi = function(name){
- alert('Hi, ' + name);
-}
-
-// executes immediately:
-sayHi('Fred');
-
-// executes after 2 seconds:
-Ext.defer(sayHi, 2000, this, ['Fred']);
-
-// this syntax is sometimes useful for deferring
-// execution of an anonymous function:
-Ext.defer(function(){
- alert('Anonymous');
-}, 100);
- </code></pre>
- * @param {Function} fn The function to defer.
- * @param {Number} millis The number of milliseconds for the setTimeout call (if less than or equal to 0 the function is executed immediately)
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the function is executed.
- * <b>If omitted, defaults to the browser window.</b>
- * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
- * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
- * if a number the args are inserted at the specified position
- * @return {Number} The timeout id that can be used with clearTimeout
- */
- defer: function(fn, millis, obj, args, appendArgs) {
- fn = Ext.util.Functions.createDelegate(fn, obj, args, appendArgs);
- if (millis > 0) {
- return setTimeout(fn, millis);
- }
- fn();
- return 0;
- },
-
-
- /**
- * Create a combined function call sequence of the original function + the passed function.
- * The resulting function returns the results of the original function.
- * The passed fcn is called with the parameters of the original function. Example usage:
- *
-
-var sayHi = function(name){
- alert('Hi, ' + name);
-}
-
-sayHi('Fred'); // alerts "Hi, Fred"
-
-var sayGoodbye = Ext.createSequence(sayHi, function(name){
- alert('Bye, ' + name);
-});
-
-sayGoodbye('Fred'); // both alerts show
-
- * @param {Function} origFn The original function.
- * @param {Function} newFn The function to sequence
- * @param {Object} scope (optional) The scope (this reference) in which the passed function is executed.
- * If omitted, defaults to the scope in which the original function is called or the browser window.
- * @return {Function} The new function
- */
- createSequence: function(origFn, newFn, scope) {
- if (!Ext.isFunction(newFn)) {
- return origFn;
- }
- else {
- return function() {
- var retval = origFn.apply(this || window, arguments);
- newFn.apply(scope || this || window, arguments);
- return retval;
- };
- }
- }
-};
-
-/**
- * Shorthand for {@link Ext.util.Functions#defer}
- * @param {Function} fn The function to defer.
- * @param {Number} millis The number of milliseconds for the setTimeout call (if less than or equal to 0 the function is executed immediately)
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the function is executed.
- * <b>If omitted, defaults to the browser window.</b>
- * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
- * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
- * if a number the args are inserted at the specified position
- * @return {Number} The timeout id that can be used with clearTimeout
- * @member Ext
- * @method defer
- */
-
-Ext.defer = Ext.util.Functions.defer;
-
-/**
- * Shorthand for {@link Ext.util.Functions#createInterceptor}
- * @param {Function} origFn The original function.
- * @param {Function} newFn The function to call before the original
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the passed function is executed.
- * <b>If omitted, defaults to the scope in which the original function is called or the browser window.</b>
- * @return {Function} The new function
- * @member Ext
- * @method defer
- */
-
-Ext.createInterceptor = Ext.util.Functions.createInterceptor;
-
-/**
- * Shorthand for {@link Ext.util.Functions#createSequence}
- * @param {Function} origFn The original function.
- * @param {Function} newFn The function to sequence
- * @param {Object} scope (optional) The scope (this reference) in which the passed function is executed.
- * If omitted, defaults to the scope in which the original function is called or the browser window.
- * @return {Function} The new function
- * @member Ext
- * @method defer
- */
-
-Ext.createSequence = Ext.util.Functions.createSequence;
-
-/**
- * Shorthand for {@link Ext.util.Functions#createDelegate}
- * @param {Function} fn The function to delegate.
- * @param {Object} scope (optional) The scope (<code><b>this</b></code> reference) in which the function is executed.
- * <b>If omitted, defaults to the browser window.</b>
- * @param {Array} args (optional) Overrides arguments for the call. (Defaults to the arguments passed by the caller)
- * @param {Boolean/Number} appendArgs (optional) if True args are appended to call args instead of overriding,
- * if a number the args are inserted at the specified position
- * @return {Function} The new function
- * @member Ext
- * @method defer
- */
-Ext.createDelegate = Ext.util.Functions.createDelegate;
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