/*
 * 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);