/*
  jQuery utils - @VERSION
  http://code.google.com/p/jquery-utils/

  (c) Maxime Haineault <haineault@gmail.com> 
  http://haineault.com

  MIT License (http://www.opensource.org/licenses/mit-license.php

*/

(function($){
     $.extend($.expr[':'], {
        // case insensitive version of :contains
        icontains: function(a,i,m){return (a.textContent||a.innerText||jQuery(a).text()||"").toLowerCase().indexOf(m[3].toLowerCase())>=0;}
    });

    $.iterators = {
        getText:  function() { return $(this).text(); },
        parseInt: function(v){ return parseInt(v, 10); }
    };

	$.extend({ 

        // Returns a range object
        // Author: Matthias Miller
        // Site:   http://blog.outofhanwell.com/2006/03/29/javascript-range-function/
        range:  function() {
            if (!arguments.length) { return []; }
            var min, max, step;
            if (arguments.length == 1) {
                min  = 0;
                max  = arguments[0]-1;
                step = 1;
            }
            else {
                // default step to 1 if it's zero or undefined
                min  = arguments[0];
                max  = arguments[1]-1;
                step = arguments[2] || 1;
            }
            // convert negative steps to positive and reverse min/max
            if (step < 0 && min >= max) {
                step *= -1;
                var tmp = min;
                min = max;
                max = tmp;
                min += ((max-min) % step);
            }
            var a = [];
            for (var i = min; i <= max; i += step) { a.push(i); }
            return a;
        },

        // Taken from ui.core.js. 
        // Why are you keeping this gem for yourself guys ? :|
        keyCode: {
            BACKSPACE: 8, CAPS_LOCK: 20, COMMA: 188, CONTROL: 17, DELETE: 46, DOWN: 40,
            END: 35, ENTER: 13, ESCAPE: 27, HOME: 36, INSERT:  45, LEFT: 37,
            NUMPAD_ADD: 107, NUMPAD_DECIMAL: 110, NUMPAD_DIVIDE: 111, NUMPAD_ENTER: 108, 
            NUMPAD_MULTIPLY: 106, NUMPAD_SUBTRACT: 109, PAGE_DOWN: 34, PAGE_UP: 33, 
            PERIOD: 190, RIGHT: 39, SHIFT: 16, SPACE: 32, TAB: 9, UP: 38
        },
        
        keyIs: function(k, e) {
            return parseInt($.keyCode[k.toUpperCase()], 10) == parseInt((typeof(e) == 'number' )? e: e.keyCode, 10);
        },

        // Redirect to a specified url
        redirect: function(url) {
            window.location.href = url;
            return url;
        },

        // Stop event shorthand
        stop: function(e, preventDefault, stopPropagation) {
            if (preventDefault)  { e.preventDefault(); }
            if (stopPropagation) { e.stopPropagation(); }
            return preventDefault && false || true;
        },

        // Returns the basename of a path
        basename: function(path) {
            var t = path.split('/');
            return t[t.length] === '' && s || t.slice(0, t.length).join('/');
        },

        // Returns the filename of a path
        filename: function(path) {
            return path.split('/').pop();
        }, 

        // Returns a formated file size
        filesizeformat: function(bytes, suffixes){
            var b = parseInt(bytes, 10);
            var s = suffixes || ['byte', 'bytes', 'KB', 'MB', 'GB'];
            if (isNaN(b) || b === 0) { return '0 ' + s[0]; }
            if (b == 1)              { return '1 ' + s[0]; }
            if (b < 1024)            { return  b.toFixed(2) + ' ' + s[1]; }
            if (b < 1048576)         { return (b / 1024).toFixed(2) + ' ' + s[2]; }
            if (b < 1073741824)      { return (b / 1048576).toFixed(2) + ' '+ s[3]; }
            else                     { return (b / 1073741824).toFixed(2) + ' '+ s[4]; }
        },

        fileExtension: function(s) {
            var tokens = s.split('.');
            return tokens[tokens.length-1] || false;
        },
        
        // Returns true if an object is a String
        isString: function(o) {
            return typeof(o) == 'string' && true || false;
        },
        
        // Returns true if an object is a RegExp
		isRegExp: function(o) {
			return o && o.constructor.toString().indexOf('RegExp()') != -1 || false;
		},
        
        // Returns true if an object is an array
        // Mark Miller - http://blog.360.yahoo.com/blog-TBPekxc1dLNy5DOloPfzVvFIVOWMB0li?p=916
		isArray: function(o) {
            if (!o) { return false; }
            return o.constructor && Object.prototype.toString.apply(o.constructor.prototype) === '[object Array]';
		},

        isObject: function(o) {
            return (typeof(o) == 'object');
        },
        
        // Convert input to currency (two decimal fixed number)
		toCurrency: function(i) {
			i = parseFloat(i, 10).toFixed(2);
			return (i=='NaN') ? '0.00' : i;
		},

        /*-------------------------------------------------------------------- 
         * javascript method: "pxToEm"
         * by:
           Scott Jehl (scott@filamentgroup.com) 
           Maggie Wachs (maggie@filamentgroup.com)
           http://www.filamentgroup.com
         *
         * Copyright (c) 2008 Filament Group
         * Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
         *
         * Description: pxToEm converts a pixel value to ems depending on inherited font size.  
         * Article: http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/
         * Demo: http://www.filamentgroup.com/examples/pxToEm/	 	
         *							
         * Options:  	 								
                scope: string or jQuery selector for font-size scoping
                reverse: Boolean, true reverses the conversion to em-px
         * Dependencies: jQuery library						  
         * Usage Example: myPixelValue.pxToEm(); or myPixelValue.pxToEm({'scope':'#navigation', reverse: true});
         *
         * Version: 2.1, 18.12.2008
         * Changelog:
         *		08.02.2007 initial Version 1.0
         *		08.01.2008 - fixed font-size calculation for IE
         *		18.12.2008 - removed native object prototyping to stay in jQuery's spirit, jsLinted (Maxime Haineault <haineault@gmail.com>)
        --------------------------------------------------------------------*/

        pxToEm: function(i, settings){
            //set defaults
            settings = jQuery.extend({
                scope: 'body',
                reverse: false
            }, settings);
            
            var pxVal = (i === '') ? 0 : parseFloat(i);
            var scopeVal;
            var getWindowWidth = function(){
                var de = document.documentElement;
                return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
            };	
            
            /* When a percentage-based font-size is set on the body, IE returns that percent of the window width as the font-size. 
                For example, if the body font-size is 62.5% and the window width is 1000px, IE will return 625px as the font-size. 	
                When this happens, we calculate the correct body font-size (%) and multiply it by 16 (the standard browser font size) 
                to get an accurate em value. */
                        
            if (settings.scope == 'body' && $.browser.msie && (parseFloat($('body').css('font-size')) / getWindowWidth()).toFixed(1) > 0.0) {
                var calcFontSize = function(){		
                    return (parseFloat($('body').css('font-size'))/getWindowWidth()).toFixed(3) * 16;
                };
                scopeVal = calcFontSize();
            }
            else { scopeVal = parseFloat(jQuery(settings.scope).css("font-size")); }
                    
            var result = (settings.reverse === true) ? (pxVal * scopeVal).toFixed(2) + 'px' : (pxVal / scopeVal).toFixed(2) + 'em';
            return result;
        }
	});

	$.extend($.fn, { 
        // Select a text range in a textarea
        selectRange: function(start, end){
            // use only the first one since only one input can be focused
            if ($(this).get(0).createTextRange) {
                var range = $(this).get(0).createTextRange();
                range.collapse(true);
                range.moveEnd('character',   end);
                range.moveStart('character', start);
                range.select();
            }
            else if ($(this).get(0).setSelectionRange) {
                $(this).bind('focus', function(e){
                    e.preventDefault();
                }).get(0).setSelectionRange(start, end);
            }
            return $(this);
        },

        /*-------------------------------------------------------------------- 
         * JQuery Plugin: "EqualHeights"
         * by:	Scott Jehl, Todd Parker, Maggie Costello Wachs (http://www.filamentgroup.com)
         *
         * Copyright (c) 2008 Filament Group
         * Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
         *
         * Description: Compares the heights or widths of the top-level children of a provided element 
                and sets their min-height to the tallest height (or width to widest width). Sets in em units 
                by default if pxToEm() method is available.
         * Dependencies: jQuery library, pxToEm method	(article: 
                http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/)							  
         * Usage Example: $(element).equalHeights();
                Optional: to set min-height in px, pass a true argument: $(element).equalHeights(true);
         * Version: 2.1, 18.12.2008
         *
         * Note: Changed pxToEm call to call $.pxToEm instead, jsLinted (Maxime Haineault <haineault@gmail.com>)
        --------------------------------------------------------------------*/

        equalHeights: function(px){
            $(this).each(function(){
                var currentTallest = 0;
                $(this).children().each(function(i){
                    if ($(this).height() > currentTallest) { currentTallest = $(this).height(); }
                });
                if (!px || !$.pxToEm) { currentTallest = $.pxToEm(currentTallest); } //use ems unless px is specified
                // for ie6, set height since min-height isn't supported
                if ($.browser.msie && $.browser.version == 6.0) { $(this).children().css({'height': currentTallest}); }
                $(this).children().css({'min-height': currentTallest}); 
            });
            return this;
        },

        // Copyright (c) 2009 James Padolsey
        // http://james.padolsey.com/javascript/jquery-delay-plugin/
        delay: function(time, callback){
            jQuery.fx.step.delay = function(){};
            return this.animate({delay:1}, time, callback);
        }        
	});
})(jQuery);
