/*
 * jQuery UI Slider 1.7.2
 *
 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Slider
 *
 * Depends:
 *        ui.core.js
 */

(function($) {

$.widget("ui.slider", $.extend({}, $.ui.mouse, {

        _init: function() {

                var self = this, o = this.options;
                this._keySliding = false;
                this._handleIndex = null;
                this._detectOrientation();
                this._mouseInit();

                this.element
                        .addClass("ui-slider"
                                + " ui-slider-" + this.orientation
                                + " ui-widget"
                                + " ui-widget-content"
                                + " ui-corner-all");

                this.range = $([]);

                if (o.range) {

                        if (o.range === true) {
                                this.range = $('<div></div>');
                                if (!o.values) o.values = [this._valueMin(), this._valueMin()];
                                if (o.values.length && o.values.length != 2) {
                                        o.values = [o.values[0], o.values[0]];
                                }
                        } else {
                                this.range = $('<div></div>');
                        }

                        this.range
                                .appendTo(this.element)
                                .addClass("ui-slider-range");

                        if (o.range == "min" || o.range == "max") {
                                this.range.addClass("ui-slider-range-" + o.range);
                        }

                        // note: this isn't the most fittingly semantic framework class for this element,
                        // but worked best visually with a variety of themes
                        this.range.addClass("ui-widget-header");

                }

                if ($(".ui-slider-handle", this.element).length == 0)
                        $('<a href="#"></a>')
                                .appendTo(this.element)
                                .addClass("ui-slider-handle");

                if (o.values && o.values.length) {
                        while ($(".ui-slider-handle", this.element).length < o.values.length)
                                $('<a href="#"></a>')
                                        .appendTo(this.element)
                                        .addClass("ui-slider-handle");
                }

                this.handles = $(".ui-slider-handle", this.element)
                        .addClass("ui-state-default"
                                + " ui-corner-all");

                this.handle = this.handles.eq(0);

                this.handles.add(this.range).filter("a")
                        .click(function(event) {
                                event.preventDefault();
                        })
                        .hover(function() {
                                if (!o.disabled) {
                                        $(this).addClass('ui-state-hover');
                                }
                        }, function() {
                                $(this).removeClass('ui-state-hover');
                        })
                        .focus(function() {
                                if (!o.disabled) {
                                        $(".ui-slider .ui-state-focus").removeClass('ui-state-focus'); $(this).addClass('ui-state-focus');
                                } else {
                                        $(this).blur();
                                }
                        })
                        .blur(function() {
                                $(this).removeClass('ui-state-focus');
                        });

                this.handles.each(function(i) {
                        $(this).data("index.ui-slider-handle", i);
                });

                this.handles.keydown(function(event) {

                        var ret = true;

                        var index = $(this).data("index.ui-slider-handle");

                        if (self.options.disabled)
                                return;

                        switch (event.keyCode) {
                                case $.ui.keyCode.HOME:
                                case $.ui.keyCode.END:
                                case $.ui.keyCode.UP:
                                case $.ui.keyCode.RIGHT:
                                case $.ui.keyCode.DOWN:
                                case $.ui.keyCode.LEFT:
                                        ret = false;
                                        if (!self._keySliding) {
                                                self._keySliding = true;
                                                $(this).addClass("ui-state-active");
                                                self._start(event, index);
                                        }
                                        break;
                        }

                        var curVal, newVal, step = self._step();
                        if (self.options.values && self.options.values.length) {
                                curVal = newVal = self.values(index);
                        } else {
                                curVal = newVal = self.value();
                        }

                        switch (event.keyCode) {
                                case $.ui.keyCode.HOME:
                                        newVal = self._valueMin();
                                        break;
                                case $.ui.keyCode.END:
                                        newVal = self._valueMax();
                                        break;
                                case $.ui.keyCode.UP:
                                case $.ui.keyCode.RIGHT:
                                        if(curVal == self._valueMax()) return;
                                        newVal = curVal + step;
                                        break;
                                case $.ui.keyCode.DOWN:
                                case $.ui.keyCode.LEFT:
                                        if(curVal == self._valueMin()) return;
                                        newVal = curVal - step;
                                        break;
                        }

                        self._slide(event, index, newVal);

                        return ret;

                }).keyup(function(event) {

                        var index = $(this).data("index.ui-slider-handle");

                        if (self._keySliding) {
                                self._stop(event, index);
                                self._change(event, index);
                                self._keySliding = false;
                                $(this).removeClass("ui-state-active");
                        }

                });

                this._refreshValue();

        },

        destroy: function() {

                this.handles.remove();
                this.range.remove();

                this.element
                        .removeClass("ui-slider"
                                + " ui-slider-horizontal"
                                + " ui-slider-vertical"
                                + " ui-slider-disabled"
                                + " ui-widget"
                                + " ui-widget-content"
                                + " ui-corner-all")
                        .removeData("slider")
                        .unbind(".slider");

                this._mouseDestroy();

        },

        _mouseCapture: function(event) {

                var o = this.options;

                if (o.disabled)
                        return false;

                this.elementSize = {
                        width: this.element.outerWidth(),
                        height: this.element.outerHeight()
                };
                this.elementOffset = this.element.offset();

                var position = { x: event.pageX, y: event.pageY };
                var normValue = this._normValueFromMouse(position);

                var distance = this._valueMax() - this._valueMin() + 1, closestHandle;
                var self = this, index;
                this.handles.each(function(i) {
                        var thisDistance = Math.abs(normValue - self.values(i));
                        if (distance > thisDistance) {
                                distance = thisDistance;
                                closestHandle = $(this);
                                index = i;
                        }
                });

                // workaround for bug #3736 (if both handles of a range are at 0,
                // the first is always used as the one with least distance,
                // and moving it is obviously prevented by preventing negative ranges)
                if(o.range == true && this.values(1) == o.min) {
                        closestHandle = $(this.handles[++index]);
                }

                this._start(event, index);

                self._handleIndex = index;

                closestHandle
                        .addClass("ui-state-active")
                        .focus();
                
                var offset = closestHandle.offset();
                var mouseOverHandle = !$(event.target).parents().andSelf().is('.ui-slider-handle');
                this._clickOffset = mouseOverHandle ? { left: 0, top: 0 } : {
                        left: event.pageX - offset.left - (closestHandle.width() / 2),
                        top: event.pageY - offset.top
                                - (closestHandle.height() / 2)
                                - (parseInt(closestHandle.css('borderTopWidth'),10) || 0)
                                - (parseInt(closestHandle.css('borderBottomWidth'),10) || 0)
                                + (parseInt(closestHandle.css('marginTop'),10) || 0)
                };

                normValue = this._normValueFromMouse(position);
                this._slide(event, index, normValue);
                return true;

        },

        _mouseStart: function(event) {
                return true;
        },

        _mouseDrag: function(event) {

                var position = { x: event.pageX, y: event.pageY };
                var normValue = this._normValueFromMouse(position);
                
                this._slide(event, this._handleIndex, normValue);

                return false;

        },

        _mouseStop: function(event) {

                this.handles.removeClass("ui-state-active");
                this._stop(event, this._handleIndex);
                this._change(event, this._handleIndex);
                this._handleIndex = null;
                this._clickOffset = null;

                return false;

        },
        
        _detectOrientation: function() {
                this.orientation = this.options.orientation == 'vertical' ? 'vertical' : 'horizontal';
        },

        _normValueFromMouse: function(position) {

                var pixelTotal, pixelMouse;
                if ('horizontal' == this.orientation) {
                        pixelTotal = this.elementSize.width;
                        pixelMouse = position.x - this.elementOffset.left - (this._clickOffset ? this._clickOffset.left : 0);
                } else {
                        pixelTotal = this.elementSize.height;
                        pixelMouse = position.y - this.elementOffset.top - (this._clickOffset ? this._clickOffset.top : 0);
                }

                var percentMouse = (pixelMouse / pixelTotal);
                if (percentMouse > 1) percentMouse = 1;
                if (percentMouse < 0) percentMouse = 0;
                if ('vertical' == this.orientation)
                        percentMouse = 1 - percentMouse;

                var valueTotal = this._valueMax() - this._valueMin(),
                        valueMouse = percentMouse * valueTotal,
                        valueMouseModStep = valueMouse % this.options.step,
                        normValue = this._valueMin() + valueMouse - valueMouseModStep;

                if (valueMouseModStep > (this.options.step / 2))
                        normValue += this.options.step;

                // Since JavaScript has problems with large floats, round
                // the final value to 5 digits after the decimal point (see #4124)
                return parseFloat(normValue.toFixed(5));

        },

        _start: function(event, index) {
                var uiHash = {
                        handle: this.handles[index],
                        value: this.value()
                };
                if (this.options.values && this.options.values.length) {
                        uiHash.value = this.values(index);
                        uiHash.values = this.values();
                }
                this._trigger("start", event, uiHash);
        },

        _slide: function(event, index, newVal) {

                var handle = this.handles[index];

                if (this.options.values && this.options.values.length) {

                        var otherVal = this.values(index ? 0 : 1);

                        if ((this.options.values.length == 2 && this.options.range === true) && 
                                ((index == 0 && newVal > otherVal) || (index == 1 && newVal < otherVal))){
                                 newVal = otherVal;
                        }

                        if (newVal != this.values(index)) {
                                var newValues = this.values();
                                newValues[index] = newVal;
                                // A slide can be canceled by returning false from the slide callback
                                var allowed = this._trigger("slide", event, {
                                        handle: this.handles[index],
                                        value: newVal,
                                        values: newValues
                                });
                                var otherVal = this.values(index ? 0 : 1);
                                if (allowed !== false) {
                                        this.values(index, newVal, ( event.type == 'mousedown' && this.options.animate ), true);
                                }
                        }

                } else {

                        if (newVal != this.value()) {
                                // A slide can be canceled by returning false from the slide callback
                                var allowed = this._trigger("slide", event, {
                                        handle: this.handles[index],
                                        value: newVal
                                });
                                if (allowed !== false) {
                                        this._setData('value', newVal, ( event.type == 'mousedown' && this.options.animate ));
                                }
                                        
                        }

                }

        },

        _stop: function(event, index) {
                var uiHash = {
                        handle: this.handles[index],
                        value: this.value()
                };
                if (this.options.values && this.options.values.length) {
                        uiHash.value = this.values(index);
                        uiHash.values = this.values();
                }
                this._trigger("stop", event, uiHash);
        },

        _change: function(event, index) {
                var uiHash = {
                        handle: this.handles[index],
                        value: this.value()
                };
                if (this.options.values && this.options.values.length) {
                        uiHash.value = this.values(index);
                        uiHash.values = this.values();
                }
                this._trigger("change", event, uiHash);
        },

        value: function(newValue) {

                if (arguments.length) {
                        this._setData("value", newValue);
                        this._change(null, 0);
                }

                return this._value();

        },

        values: function(index, newValue, animated, noPropagation) {

                if (arguments.length > 1) {
                        this.options.values[index] = newValue;
                        this._refreshValue(animated);
                        if(!noPropagation) this._change(null, index);
                }

                if (arguments.length) {
                        if (this.options.values && this.options.values.length) {
                                return this._values(index);
                        } else {
                                return this.value();
                        }
                } else {
                        return this._values();
                }

        },

        _setData: function(key, value, animated) {

                $.widget.prototype._setData.apply(this, arguments);

                switch (key) {
                        case 'disabled':
                                if (value) {
                                        this.handles.filter(".ui-state-focus").blur();
                                        this.handles.removeClass("ui-state-hover");
                                        this.handles.attr("disabled", "disabled");
                                } else {
                                        this.handles.removeAttr("disabled");
                                }
                        case 'orientation':

                                this._detectOrientation();
                                
                                this.element
                                        .removeClass("ui-slider-horizontal ui-slider-vertical")
                                        .addClass("ui-slider-" + this.orientation);
                                this._refreshValue(animated);
                                break;
                        case 'value':
                                this._refreshValue(animated);
                                break;
                }

        },

        _step: function() {
                var step = this.options.step;
                return step;
        },

        _value: function() {

                var val = this.options.value;
                if (val < this._valueMin()) val = this._valueMin();
                if (val > this._valueMax()) val = this._valueMax();

                return val;

        },

        _values: function(index) {

                if (arguments.length) {
                        var val = this.options.values[index];
                        if (val < this._valueMin()) val = this._valueMin();
                        if (val > this._valueMax()) val = this._valueMax();

                        return val;
                } else {
                        return this.options.values;
                }

        },

        _valueMin: function() {
                var valueMin = this.options.min;
                return valueMin;
        },

        _valueMax: function() {
                var valueMax = this.options.max;
                return valueMax;
        },

        _refreshValue: function(animate) {

                var oRange = this.options.range, o = this.options, self = this;

                if (this.options.values && this.options.values.length) {
                        var vp0, vp1;
                        this.handles.each(function(i, j) {
                                var valPercent = (self.values(i) - self._valueMin()) / (self._valueMax() - self._valueMin()) * 100;
                                var _set = {}; _set[self.orientation == 'horizontal' ? 'left' : 'bottom'] = valPercent + '%';
                                $(this).stop(1,1)[animate ? 'animate' : 'css'](_set, o.animate);
                                if (self.options.range === true) {
                                        if (self.orientation == 'horizontal') {
                                                (i == 0) && self.range.stop(1,1)[animate ? 'animate' : 'css']({ left: valPercent + '%' }, o.animate);
                                                (i == 1) && self.range[animate ? 'animate' : 'css']({ width: (valPercent - lastValPercent) + '%' }, { queue: false, duration: o.animate });
                                        } else {
                                                (i == 0) && self.range.stop(1,1)[animate ? 'animate' : 'css']({ bottom: (valPercent) + '%' }, o.animate);
                                                (i == 1) && self.range[animate ? 'animate' : 'css']({ height: (valPercent - lastValPercent) + '%' }, { queue: false, duration: o.animate });
                                        }
                                }
                                lastValPercent = valPercent;
                        });
                } else {
                        var value = this.value(),
                                valueMin = this._valueMin(),
                                valueMax = this._valueMax(),
                                valPercent = valueMax != valueMin
                                        ? (value - valueMin) / (valueMax - valueMin) * 100
                                        : 0;
                        var _set = {}; _set[self.orientation == 'horizontal' ? 'left' : 'bottom'] = valPercent + '%';
                        this.handle.stop(1,1)[animate ? 'animate' : 'css'](_set, o.animate);

                        (oRange == "min") && (this.orientation == "horizontal") && this.range.stop(1,1)[animate ? 'animate' : 'css']({ width: valPercent + '%' }, o.animate);
                        (oRange == "max") && (this.orientation == "horizontal") && this.range[animate ? 'animate' : 'css']({ width: (100 - valPercent) + '%' }, { queue: false, duration: o.animate });
                        (oRange == "min") && (this.orientation == "vertical") && this.range.stop(1,1)[animate ? 'animate' : 'css']({ height: valPercent + '%' }, o.animate);
                        (oRange == "max") && (this.orientation == "vertical") && this.range[animate ? 'animate' : 'css']({ height: (100 - valPercent) + '%' }, { queue: false, duration: o.animate });
                }

        }
        
}));

$.extend($.ui.slider, {
        getter: "value values",
        version: "1.7.2",
        eventPrefix: "slide",
        defaults: {
                animate: false,
                delay: 0,
                distance: 0,
                max: 100,
                min: 0,
                orientation: 'horizontal',
                range: false,
                step: 1,
                value: 0,
                values: null
        }
});

})(jQuery);