source: trunk/workshop-routing-foss4g/web/ext/src/core/Ext-more.js @ 76

/*!
 * Ext JS Library 3.4.0
 * Copyright(c) 2006-2011 Sencha Inc.
 * licensing@sencha.com
 * http://www.sencha.com/license
 */
/**
 * @class Ext
 */

Ext.ns("Ext.grid", "Ext.list", "Ext.dd", "Ext.tree", "Ext.form", "Ext.menu",
       "Ext.state", "Ext.layout.boxOverflow", "Ext.app", "Ext.ux", "Ext.chart", "Ext.direct", "Ext.slider");
    /**
     * Namespace alloted for extensions to the framework.
     * @property ux
     * @type Object
     */

Ext.apply(Ext, function(){
    var E = Ext,
        idSeed = 0,
        scrollWidth = null;

    return {
        /**
        * A reusable empty function
        * @property
        * @type Function
        */
        emptyFn : function(){},

        /**
         * URL to a 1x1 transparent gif image used by Ext to create inline icons with CSS background images.
         * In older versions of IE, this defaults to "http://extjs.com/s.gif" and you should change this to a URL on your server.
         * For other browsers it uses an inline data URL.
         * @type String
         */
        BLANK_IMAGE_URL : Ext.isIE6 || Ext.isIE7 || Ext.isAir ?
                            'http:/' + '/www.extjs.com/s.gif' :
                            'data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==',

        extendX : function(supr, fn){
            return Ext.extend(supr, fn(supr.prototype));
        },

        /**
         * Returns the current HTML document object as an {@link Ext.Element}.
         * @return Ext.Element The document
         */
        getDoc : function(){
            return Ext.get(document);
        },

        /**
         * Utility method for validating that a value is numeric, returning the specified default value if it is not.
         * @param {Mixed} value Should be a number, but any type will be handled appropriately
         * @param {Number} defaultValue The value to return if the original value is non-numeric
         * @return {Number} Value, if numeric, else defaultValue
         */
        num : function(v, defaultValue){
            v = Number(Ext.isEmpty(v) || Ext.isArray(v) || typeof v == 'boolean' || (typeof v == 'string' && v.trim().length == 0) ? NaN : v);
            return isNaN(v) ? defaultValue : v;
        },

        /**
         * <p>Utility method for returning a default value if the passed value is empty.</p>
         * <p>The value is deemed to be empty if it is<div class="mdetail-params"><ul>
         * <li>null</li>
         * <li>undefined</li>
         * <li>an empty array</li>
         * <li>a zero length string (Unless the <tt>allowBlank</tt> parameter is <tt>true</tt>)</li>
         * </ul></div>
         * @param {Mixed} value The value to test
         * @param {Mixed} defaultValue The value to return if the original value is empty
         * @param {Boolean} allowBlank (optional) true to allow zero length strings to qualify as non-empty (defaults to false)
         * @return {Mixed} value, if non-empty, else defaultValue
         */
        value : function(v, defaultValue, allowBlank){
            return Ext.isEmpty(v, allowBlank) ? defaultValue : v;
        },

        /**
         * Escapes the passed string for use in a regular expression
         * @param {String} str
         * @return {String}
         */
        escapeRe : function(s) {
            return s.replace(/([-.*+?^${}()|[\]\/\\])/g, "\\$1");
        },

        sequence : function(o, name, fn, scope){
            o[name] = o[name].createSequence(fn, scope);
        },

        /**
         * Applies event listeners to elements by selectors when the document is ready.
         * The event name is specified with an <tt>&#64;</tt> suffix.
         * <pre><code>
Ext.addBehaviors({
    // add a listener for click on all anchors in element with id foo
    '#foo a&#64;click' : function(e, t){
        // do something
    },

    // add the same listener to multiple selectors (separated by comma BEFORE the &#64;)
    '#foo a, #bar span.some-class&#64;mouseover' : function(){
        // do something
    }
});
         * </code></pre>
         * @param {Object} obj The list of behaviors to apply
         */
        addBehaviors : function(o){
            if(!Ext.isReady){
                Ext.onReady(function(){
                    Ext.addBehaviors(o);
                });
            } else {
                var cache = {}, // simple cache for applying multiple behaviors to same selector does query multiple times
                    parts,
                    b,
                    s;
                for (b in o) {
                    if ((parts = b.split('@'))[1]) { // for Object prototype breakers
                        s = parts[0];
                        if(!cache[s]){
                            cache[s] = Ext.select(s);
                        }
                        cache[s].on(parts[1], o[b]);
                    }
                }
                cache = null;
            }
        },

        /**
         * Utility method for getting the width of the browser scrollbar. This can differ depending on
         * operating system settings, such as the theme or font size.
         * @param {Boolean} force (optional) true to force a recalculation of the value.
         * @return {Number} The width of the scrollbar.
         */
        getScrollBarWidth: function(force){
            if(!Ext.isReady){
                return 0;
            }

            if(force === true || scrollWidth === null){
                    // Append our div, do our calculation and then remove it
                var div = Ext.getBody().createChild('<div class="x-hide-offsets" style="width:100px;height:50px;overflow:hidden;"><div style="height:200px;"></div></div>'),
                    child = div.child('div', true);
                var w1 = child.offsetWidth;
                div.setStyle('overflow', (Ext.isWebKit || Ext.isGecko) ? 'auto' : 'scroll');
                var w2 = child.offsetWidth;
                div.remove();
                // Need to add 2 to ensure we leave enough space
                scrollWidth = w1 - w2 + 2;
            }
            return scrollWidth;
        },


        // deprecated
        combine : function(){
            var as = arguments, l = as.length, r = [];
            for(var i = 0; i < l; i++){
                var a = as[i];
                if(Ext.isArray(a)){
                    r = r.concat(a);
                }else if(a.length !== undefined && !a.substr){
                    r = r.concat(Array.prototype.slice.call(a, 0));
                }else{
                    r.push(a);
                }
            }
            return r;
        },

        /**
         * Copies a set of named properties fom the source object to the destination object.
         * <p>example:<pre><code>
ImageComponent = Ext.extend(Ext.BoxComponent, {
    initComponent: function() {
        this.autoEl = { tag: 'img' };
        MyComponent.superclass.initComponent.apply(this, arguments);
        this.initialBox = Ext.copyTo({}, this.initialConfig, 'x,y,width,height');
    }
});
         * </code></pre>
         * @param {Object} dest The destination object.
         * @param {Object} source The source object.
         * @param {Array/String} names Either an Array of property names, or a comma-delimited list
         * of property names to copy.
         * @return {Object} The modified object.
        */
        copyTo : function(dest, source, names){
            if(typeof names == 'string'){
                names = names.split(/[,;\s]/);
            }
            Ext.each(names, function(name){
                if(source.hasOwnProperty(name)){
                    dest[name] = source[name];
                }
            }, this);
            return dest;
        },

        /**
         * Attempts to destroy any objects passed to it by removing all event listeners, removing them from the
         * DOM (if applicable) and calling their destroy functions (if available).  This method is primarily
         * intended for arguments of type {@link Ext.Element} and {@link Ext.Component}, but any subclass of
         * {@link Ext.util.Observable} can be passed in.  Any number of elements and/or components can be
         * passed into this function in a single call as separate arguments.
         * @param {Mixed} arg1 An {@link Ext.Element}, {@link Ext.Component}, or an Array of either of these to destroy
         * @param {Mixed} arg2 (optional)
         * @param {Mixed} etc... (optional)
         */
        destroy : function(){
            Ext.each(arguments, function(arg){
                if(arg){
                    if(Ext.isArray(arg)){
                        this.destroy.apply(this, arg);
                    }else if(typeof arg.destroy == 'function'){
                        arg.destroy();
                    }else if(arg.dom){
                        arg.remove();
                    }
                }
            }, this);
        },

        /**
         * Attempts to destroy and then remove a set of named properties of the passed object.
         * @param {Object} o The object (most likely a Component) who's properties you wish to destroy.
         * @param {Mixed} arg1 The name of the property to destroy and remove from the object.
         * @param {Mixed} etc... More property names to destroy and remove.
         */
        destroyMembers : function(o, arg1, arg2, etc){
            for(var i = 1, a = arguments, len = a.length; i < len; i++) {
                Ext.destroy(o[a[i]]);
                delete o[a[i]];
            }
        },

        /**
         * Creates a copy of the passed Array with falsy values removed.
         * @param {Array/NodeList} arr The Array from which to remove falsy values.
         * @return {Array} The new, compressed Array.
         */
        clean : function(arr){
            var ret = [];
            Ext.each(arr, function(v){
                if(!!v){
                    ret.push(v);
                }
            });
            return ret;
        },

        /**
         * Creates a copy of the passed Array, filtered to contain only unique values.
         * @param {Array} arr The Array to filter
         * @return {Array} The new Array containing unique values.
         */
        unique : function(arr){
            var ret = [],
                collect = {};

            Ext.each(arr, function(v) {
                if(!collect[v]){
                    ret.push(v);
                }
                collect[v] = true;
            });
            return ret;
        },

        /**
         * Recursively flattens into 1-d Array. Injects Arrays inline.
         * @param {Array} arr The array to flatten
         * @return {Array} The new, flattened array.
         */
        flatten : function(arr){
            var worker = [];
            function rFlatten(a) {
                Ext.each(a, function(v) {
                    if(Ext.isArray(v)){
                        rFlatten(v);
                    }else{
                        worker.push(v);
                    }
                });
                return worker;
            }
            return rFlatten(arr);
        },

        /**
         * Returns the minimum value in the Array.
         * @param {Array|NodeList} arr The Array from which to select the minimum value.
         * @param {Function} comp (optional) a function to perform the comparision which determines minimization.
         *                   If omitted the "<" operator will be used. Note: gt = 1; eq = 0; lt = -1
         * @return {Object} The minimum value in the Array.
         */
        min : function(arr, comp){
            var ret = arr[0];
            comp = comp || function(a,b){ return a < b ? -1 : 1; };
            Ext.each(arr, function(v) {
                ret = comp(ret, v) == -1 ? ret : v;
            });
            return ret;
        },

        /**
         * Returns the maximum value in the Array
         * @param {Array|NodeList} arr The Array from which to select the maximum value.
         * @param {Function} comp (optional) a function to perform the comparision which determines maximization.
         *                   If omitted the ">" operator will be used. Note: gt = 1; eq = 0; lt = -1
         * @return {Object} The maximum value in the Array.
         */
        max : function(arr, comp){
            var ret = arr[0];
            comp = comp || function(a,b){ return a > b ? 1 : -1; };
            Ext.each(arr, function(v) {
                ret = comp(ret, v) == 1 ? ret : v;
            });
            return ret;
        },

        /**
         * Calculates the mean of the Array
         * @param {Array} arr The Array to calculate the mean value of.
         * @return {Number} The mean.
         */
        mean : function(arr){
           return arr.length > 0 ? Ext.sum(arr) / arr.length : undefined;
        },

        /**
         * Calculates the sum of the Array
         * @param {Array} arr The Array to calculate the sum value of.
         * @return {Number} The sum.
         */
        sum : function(arr){
           var ret = 0;
           Ext.each(arr, function(v) {
               ret += v;
           });
           return ret;
        },

        /**
         * Partitions the set into two sets: a true set and a false set.
         * Example:
         * Example2:
         * <pre><code>
// Example 1:
Ext.partition([true, false, true, true, false]); // [[true, true, true], [false, false]]

// Example 2:
Ext.partition(
    Ext.query("p"),
    function(val){
        return val.className == "class1"
    }
);
// true are those paragraph elements with a className of "class1",
// false set are those that do not have that className.
         * </code></pre>
         * @param {Array|NodeList} arr The array to partition
         * @param {Function} truth (optional) a function to determine truth.  If this is omitted the element
         *                   itself must be able to be evaluated for its truthfulness.
         * @return {Array} [true<Array>,false<Array>]
         */
        partition : function(arr, truth){
            var ret = [[],[]];
            Ext.each(arr, function(v, i, a) {
                ret[ (truth && truth(v, i, a)) || (!truth && v) ? 0 : 1].push(v);
            });
            return ret;
        },

        /**
         * Invokes a method on each item in an Array.
         * <pre><code>
// Example:
Ext.invoke(Ext.query("p"), "getAttribute", "id");
// [el1.getAttribute("id"), el2.getAttribute("id"), ..., elN.getAttribute("id")]
         * </code></pre>
         * @param {Array|NodeList} arr The Array of items to invoke the method on.
         * @param {String} methodName The method name to invoke.
         * @param {...*} args Arguments to send into the method invocation.
         * @return {Array} The results of invoking the method on each item in the array.
         */
        invoke : function(arr, methodName){
            var ret = [],
                args = Array.prototype.slice.call(arguments, 2);
            Ext.each(arr, function(v,i) {
                if (v && typeof v[methodName] == 'function') {
                    ret.push(v[methodName].apply(v, args));
                } else {
                    ret.push(undefined);
                }
            });
            return ret;
        },

        /**
         * Plucks the value of a property from each item in the Array
         * <pre><code>
// Example:
Ext.pluck(Ext.query("p"), "className"); // [el1.className, el2.className, ..., elN.className]
         * </code></pre>
         * @param {Array|NodeList} arr The Array of items to pluck the value from.
         * @param {String} prop The property name to pluck from each element.
         * @return {Array} The value from each item in the Array.
         */
        pluck : function(arr, prop){
            var ret = [];
            Ext.each(arr, function(v) {
                ret.push( v[prop] );
            });
            return ret;
        },

        /**
         * <p>Zips N sets together.</p>
         * <pre><code>
// Example 1:
Ext.zip([1,2,3],[4,5,6]); // [[1,4],[2,5],[3,6]]
// Example 2:
Ext.zip(
    [ "+", "-", "+"],
    [  12,  10,  22],
    [  43,  15,  96],
    function(a, b, c){
        return "$" + a + "" + b + "." + c
    }
); // ["$+12.43", "$-10.15", "$+22.96"]
         * </code></pre>
         * @param {Arrays|NodeLists} arr This argument may be repeated. Array(s) to contribute values.
         * @param {Function} zipper (optional) The last item in the argument list. This will drive how the items are zipped together.
         * @return {Array} The zipped set.
         */
        zip : function(){
            var parts = Ext.partition(arguments, function( val ){ return typeof val != 'function'; }),
                arrs = parts[0],
                fn = parts[1][0],
                len = Ext.max(Ext.pluck(arrs, "length")),
                ret = [];

            for (var i = 0; i < len; i++) {
                ret[i] = [];
                if(fn){
                    ret[i] = fn.apply(fn, Ext.pluck(arrs, i));
                }else{
                    for (var j = 0, aLen = arrs.length; j < aLen; j++){
                        ret[i].push( arrs[j][i] );
                    }
                }
            }
            return ret;
        },

        /**
         * This is shorthand reference to {@link Ext.ComponentMgr#get}.
         * Looks up an existing {@link Ext.Component Component} by {@link Ext.Component#id id}
         * @param {String} id The component {@link Ext.Component#id id}
         * @return Ext.Component The Component, <tt>undefined</tt> if not found, or <tt>null</tt> if a
         * Class was found.
        */
        getCmp : function(id){
            return Ext.ComponentMgr.get(id);
        },

        /**
         * By default, Ext intelligently decides whether floating elements should be shimmed. If you are using flash,
         * you may want to set this to true.
         * @type Boolean
         */
        useShims: E.isIE6 || (E.isMac && E.isGecko2),

        // inpired by a similar function in mootools library
        /**
         * Returns the type of object that is passed in. If the object passed in is null or undefined it
         * return false otherwise it returns one of the following values:<div class="mdetail-params"><ul>
         * <li><b>string</b>: If the object passed is a string</li>
         * <li><b>number</b>: If the object passed is a number</li>
         * <li><b>boolean</b>: If the object passed is a boolean value</li>
         * <li><b>date</b>: If the object passed is a Date object</li>
         * <li><b>function</b>: If the object passed is a function reference</li>
         * <li><b>object</b>: If the object passed is an object</li>
         * <li><b>array</b>: If the object passed is an array</li>
         * <li><b>regexp</b>: If the object passed is a regular expression</li>
         * <li><b>element</b>: If the object passed is a DOM Element</li>
         * <li><b>nodelist</b>: If the object passed is a DOM NodeList</li>
         * <li><b>textnode</b>: If the object passed is a DOM text node and contains something other than whitespace</li>
         * <li><b>whitespace</b>: If the object passed is a DOM text node and contains only whitespace</li>
         * </ul></div>
         * @param {Mixed} object
         * @return {String}
         */
        type : function(o){
            if(o === undefined || o === null){
                return false;
            }
            if(o.htmlElement){
                return 'element';
            }
            var t = typeof o;
            if(t == 'object' && o.nodeName) {
                switch(o.nodeType) {
                    case 1: return 'element';
                    case 3: return (/\S/).test(o.nodeValue) ? 'textnode' : 'whitespace';
                }
            }
            if(t == 'object' || t == 'function') {
                switch(o.constructor) {
                    case Array: return 'array';
                    case RegExp: return 'regexp';
                    case Date: return 'date';
                }
                if(typeof o.length == 'number' && typeof o.item == 'function') {
                    return 'nodelist';
                }
            }
            return t;
        },

        intercept : function(o, name, fn, scope){
            o[name] = o[name].createInterceptor(fn, scope);
        },

        // internal
        callback : function(cb, scope, args, delay){
            if(typeof cb == 'function'){
                if(delay){
                    cb.defer(delay, scope, args || []);
                }else{
                    cb.apply(scope, args || []);
                }
            }
        }
    };
}());

/**
 * @class Function
 * These functions are available on every Function object (any JavaScript function).
 */
Ext.apply(Function.prototype, {
    /**
     * 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:
     * <pre><code>
var sayHi = function(name){
    alert('Hi, ' + name);
}

sayHi('Fred'); // alerts "Hi, Fred"

var sayGoodbye = sayHi.createSequence(function(name){
    alert('Bye, ' + name);
});

sayGoodbye('Fred'); // both alerts show
</code></pre>
     * @param {Function} fcn The function to sequence
     * @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
     */
    createSequence : function(fcn, scope){
        var method = this;
        return (typeof fcn != 'function') ?
                this :
                function(){
                    var retval = method.apply(this || window, arguments);
                    fcn.apply(scope || this || window, arguments);
                    return retval;
                };
    }
});


/**
 * @class String
 * These functions are available as static methods on the JavaScript String object.
 */
Ext.applyIf(String, {

    /**
     * Escapes the passed string for ' and \
     * @param {String} string The string to escape
     * @return {String} The escaped string
     * @static
     */
    escape : function(string) {
        return string.replace(/('|\\)/g, "\\$1");
    },

    /**
     * Pads the left side of a string with a specified character.  This is especially useful
     * for normalizing number and date strings.  Example usage:
     * <pre><code>
var s = String.leftPad('123', 5, '0');
// s now contains the string: '00123'
     * </code></pre>
     * @param {String} string The original string
     * @param {Number} size The total length of the output string
     * @param {String} char (optional) The character with which to pad the original string (defaults to empty string " ")
     * @return {String} The padded string
     * @static
     */
    leftPad : function (val, size, ch) {
        var result = String(val);
        if(!ch) {
            ch = " ";
        }
        while (result.length < size) {
            result = ch + result;
        }
        return result;
    }
});

/**
 * Utility function that allows you to easily switch a string between two alternating values.  The passed value
 * is compared to the current string, and if they are equal, the other value that was passed in is returned.  If
 * they are already different, the first value passed in is returned.  Note that this method returns the new value
 * but does not change the current string.
 * <pre><code>
// alternate sort directions
sort = sort.toggle('ASC', 'DESC');

// instead of conditional logic:
sort = (sort == 'ASC' ? 'DESC' : 'ASC');
</code></pre>
 * @param {String} value The value to compare to the current string
 * @param {String} other The new value to use if the string already equals the first value passed in
 * @return {String} The new value
 */
String.prototype.toggle = function(value, other){
    return this == value ? other : value;
};

/**
 * Trims whitespace from either end of a string, leaving spaces within the string intact.  Example:
 * <pre><code>
var s = '  foo bar  ';
alert('-' + s + '-');         //alerts "- foo bar -"
alert('-' + s.trim() + '-');  //alerts "-foo bar-"
</code></pre>
 * @return {String} The trimmed string
 */
String.prototype.trim = function(){
    var re = /^\s+|\s+$/g;
    return function(){ return this.replace(re, ""); };
}();

// here to prevent dependency on Date.js
/**
 Returns the number of milliseconds between this date and date
 @param {Date} date (optional) Defaults to now
 @return {Number} The diff in milliseconds
 @member Date getElapsed
 */
Date.prototype.getElapsed = function(date) {
    return Math.abs((date || new Date()).getTime()-this.getTime());
};


/**
 * @class Number
 */
Ext.applyIf(Number.prototype, {
    /**
     * Checks whether or not the current number is within a desired range.  If the number is already within the
     * range it is returned, otherwise the min or max value is returned depending on which side of the range is
     * exceeded.  Note that this method returns the constrained value but does not change the current number.
     * @param {Number} min The minimum number in the range
     * @param {Number} max The maximum number in the range
     * @return {Number} The constrained value if outside the range, otherwise the current value
     */
    constrain : function(min, max){
        return Math.min(Math.max(this, min), max);
    }
});