/*
* 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: 800,
            min: 0,
            orientation: 'auto',
            range: false,
            step: 1,
            value: 0,
            values: null
        }
    });

})(jQuery);