/**
 * slider_hvs.js version 1.0.0
 */
// Copyright (c) 2005 Marty Haught, Thomas Fuchs
//
// See http://script.aculo.us for more info
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

if(!Control) var Control = {};
Control.Slider = Class.create();

// options:
//  axis: 'vertical', or 'horizontal' (default)
//
// callbacks:
//  onChange(value)
//  onSlide(value)
Control.Slider.prototype = {
  initialize: function(handle, track, options) {
    var slider = this;
		this.hasHandleFocus=false;
    if(handle instanceof Array) {
      this.handles = handle.collect( function(e) { return $(e) });
    } else {
      this.handles = [$(handle)];
    }
			
    this.track   = $(track);
    this.options = options || {};

    this.axis      = this.options.axis || 'horizontal';
    this.increment = this.options.increment || 1;
    this.step      = parseInt(this.options.step || '1');
    this.keystep      = parseInt(this.options.keystep || '1');
    this.range     = this.options.range || $R(0,1);
    this.direction = this.options.direction || 'up';
    this.indexSlider = this.options.indexSlider || 0;
    this.returnFunction = this.options.returnFunction;

    this.value     = 0; // assure backwards compat
    this.values    = this.handles.map( function() { return 0 });
    this.spans     = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
    this.options.startSpan = $(this.options.startSpan || null);
    this.options.endSpan   = $(this.options.endSpan || null);

    this.lock = this.options.lock?$(this.options.lock):'';
    this.lockImage = this.options.lockImage?this.options.lockImage:'';
    this.unlockImage = this.options.unlockImage?this.options.unlockImage:'';

    this.restricted = this.options.restricted || false;

    this.maximum   = this.options.maximum || this.range.end;
    this.minimum   = this.options.minimum || this.range.start;

    // Will be used to align the handle onto the track, if necessary
    this.alignX = parseInt(this.options.alignX || '0');
    this.alignY = parseInt(this.options.alignY || '0');

    this.trackLength = this.maximumOffset() - this.minimumOffset();
    this.handleLength = this.isVertical() ? this.handles[0].offsetHeight : this.handles[0].offsetWidth;

    this.active   = false;
    this.keyActif = false;
    this.dragging = false;
    this.disabled = false;
    this.sliderActif = false;
    this.timerID=null;

    if(this.options.disabled) this.setDisabled();

    // Allowed values array
    this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
    if(this.allowedValues) {
      this.minimum = this.allowedValues.min();
      this.maximum = this.allowedValues.max();
    }

    this.eventMouseDown = this.startDrag.bindAsEventListener(this);
    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
    this.eventMouseMove = this.update.bindAsEventListener(this);
    this.eventLock = this.lockSlider.bindAsEventListener(this);
    
    this.eventFocus = this.gainFocus.bindAsEventListener(this);
    this.eventBlur = this.lostFocus.bindAsEventListener(this);
    
    this.eventKeyDown = this.keyDrag.bindAsEventListener(this);
    this.eventKeyUp = this.keyFinish.bindAsEventListener(this);
    

    // Initialize handles in reverse (make sure first handle is active)
    this.handles.each( function(h,i) {
      i = slider.handles.length-1-i;
      slider.setValue(parseFloat(
        (slider.options.sliderValue instanceof Array ?
          slider.options.sliderValue[i] : slider.options.sliderValue) ||
         slider.range.start), i);
      Element.makePositioned(h); // fix IE
      Event.observe(h, "mousedown", slider.eventMouseDown);
    });

    if (this.options.noclick!=true)
        Event.observe(this.track, "mousedown", this.eventMouseDown);
    Event.observe(document, "mouseup", this.eventMouseUp);
    Event.observe(document, "mousemove", this.eventMouseMove);
    if (this.lock!='')
    	Event.observe(this.lock, "mousedown", this.eventLock);

		Event.observe(this.handles[0], "focus", this.eventFocus);
		Event.observe(this.handles[0], "blur", this.eventBlur);
		
		Event.observe(this.handles[0], "keydown", this.eventKeyDown);
		Event.observe(this.handles[0], "keyup", this.eventKeyUp);
		
    this.initialized = true;
  },
  changeRange:function(range)
  {
	  var slider = this;
	  this.range     = range || $R(0,1);
	  this.maximum   = this.options.maximum || this.range.end;
	  this.minimum   = this.options.minimum || this.range.start;
	   // Initialize handles in reverse (make sure first handle is active)
		this.handles.each( function(h,i) {
		  i = slider.handles.length-1-i;
		  slider.setValue(parseFloat(
			slider.value || slider.range.start), i);
		  Element.makePositioned(h); // fix IE
		});
  },
  lockSlider:function()
  {
  	if (this.disabled==true)
  	{
  		this.disabled=false;
  		this.lock.style.backgroundImage = 'url('+this.unlockImage+')';
  	}
	else
	{
		this.disabled=true;
		this.lock.style.backgroundImage = 'url('+this.lockImage+')';
	}

  },
  dispose: function() {
    var slider = this;
    Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
    Event.stopObserving(document, "mouseup", this.eventMouseUp);
    Event.stopObserving(document, "mousemove", this.eventMouseMove);
    this.handles.each( function(h) {
      Event.stopObserving(h, "mousedown", slider.eventMouseDown);
      Event.stopObserving(h, "focus", this.eventFocus);
			Event.stopObserving(h, "blur", this.eventBlur);
			Event.stopObserving(h, "keydown", this.eventKeyDown);
			Event.stopObserving(h, "keyup", this.eventKeyUp);
    });
  },
  setDisabled: function(){
    this.disabled = true;
  },
  setEnabled: function(){
    this.disabled = false;
  },
  getNearestValue: function(value){
    if(this.allowedValues){
      if(value >= this.allowedValues.max()) return(this.allowedValues.max());
      if(value <= this.allowedValues.min()) return(this.allowedValues.min());

      var offset = Math.abs(this.allowedValues[0] - value);
      var newValue = this.allowedValues[0];
      this.allowedValues.each( function(v) {
        var currentOffset = Math.abs(v - value);
        if(currentOffset <= offset){
          newValue = v;
          offset = currentOffset;
        }
      });
      return newValue;
    }

	 if (value < this.minimum) return this.minimum;
	 if (value > this.maximum) return this.maximum;
    if(value > this.range.end) return this.range.end;
    if(value < this.range.start) return this.range.start;
    return value;
  },
  setValue: function(sliderValue, handleIdx){
    if(!this.active) {
      this.activeHandle    = this.handles[handleIdx];
      this.activeHandleIdx = handleIdx;
      this.updateStyles();
    }
    handleIdx = handleIdx || this.activeHandleIdx || 0;
    if(this.initialized && this.restricted) {
      if((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
        sliderValue = this.values[handleIdx-1];
      if((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
        sliderValue = this.values[handleIdx+1];
    }
    sliderValue = this.getNearestValue(sliderValue);
    this.values[handleIdx] = sliderValue;
    this.value = this.values[0]; // assure backwards compat

    this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] =
      this.translateToPx(sliderValue);

    this.drawSpans();
    if(!this.dragging || !this.event) this.updateFinished();
  },
  setValueBy: function(delta, handleIdx) {
    this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta,
      handleIdx || this.activeHandleIdx || 0);
  },
  translateToPx: function(value) {
    if (this.direction=='up')
    {
    	return Math.round(((this.trackLength-this.handleLength)-
      	((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) *
      	(value - this.range.start))) + "px";
    }
    else
    {
      return Math.round(
      	((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) *
      	(value - this.range.start)) + "px";
    }
  },
  translateToValue: function(offset) {
    var valeur = 0;
    if (this.direction=='up')
    {
    	valeur = (this.range.end-(offset/(this.trackLength-this.handleLength) *
      		(this.range.end-this.range.start)) + this.range.start);
    }
    else
    {
      	valeur = ((offset/(this.trackLength-this.handleLength) *
      		(this.range.end-this.range.start)) + this.range.start);
    }
    if (this.step>0)
    	return this.setValeurPas(valeur);
    else
    	return valeur;
  },
  getRange: function(range) {
    var v = this.values.sortBy(Prototype.K);
    range = range || 0;
    return $R(v[range],v[range+1]);
  },
  minimumOffset: function(){
    return(this.isVertical() ? this.alignY : this.alignX);
  },
  maximumOffset: function(){
    return(this.isVertical() ?
      this.track.offsetHeight - this.alignY : this.track.offsetWidth - this.alignX);
  },
  isVertical:  function(){
    return (this.axis == 'vertical');
  },
  drawSpans: function() {
    var slider = this;
    if(this.spans)
      $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
    if(this.options.startSpan)
      this.setSpan(this.options.startSpan,
        $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
    if(this.options.endSpan)
      this.setSpan(this.options.endSpan,
        $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
  },
  setSpan: function(span, range) {
    if(this.isVertical()) {
      span.style.top = this.translateToPx(range.start);
      span.style.height = this.translateToPx(range.end - range.start + this.range.start);
    } else {
      span.style.left = this.translateToPx(range.start);
      span.style.width = this.translateToPx(range.end - range.start + this.range.start);
    }
  },
  updateStyles: function() {
    this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
    Element.addClassName(this.activeHandle, 'selected');
  },
  gainFocus: function(event)
  {
  	this.hasHandleFocus=true;
  },
  lostFocus: function(event)
  {
  	this.hasHandleFocus=false;
  },
  keyDrag: function(event) {
  	if (this.hasHandleFocus==true && !this.disabled)
  	{
  		var codeKey = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
  		var coeff = 1;
  		if (codeKey == Event.KEY_LEFT || codeKey == Event.KEY_DOWN || codeKey == Event.KEY_RIGHT || codeKey == Event.KEY_UP)
                {
                  this.keyActif=true;
                  var valeur = this.value+this.keystep*coeff;
                  if (codeKey == Event.KEY_LEFT || codeKey == Event.KEY_DOWN)
                  {
  			valeur = this.value-this.keystep*coeff;
                  }
                  if (this.step>0)
                    valeur = this.setValeurPas(valeur,this.keystep);
                  this.setValue(valeur);
                }
                if(this.initialized && this.options.onSlide)
                  this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
  	}
  },
  keyFinish: function() {
  	if (this.keyActif==true)
  	{
  		if (this.timerID!=null)
  		{
  			clearTimeout(this.timerID);
  		}
  		this.timerID = setTimeout(function(){this.sliderActif = true;this.updateFinished();this.sliderActif = false;}.bindAsEventListener(this),400);
  		this.keyActif=false;
  	}
  	
  },
  startDrag: function(event) {
    if(Event.isLeftClick(event)) {
		 var handle = Event.element(event);
      if(!this.disabled && handle!=this.track){
        this.active = true;
        this.sliderActif = true;
        var pointer  = [Event.pointerX(event), Event.pointerY(event)];
          // find the handle (prevents issues with Safari)
          while((this.handles.indexOf(handle) == -1) && handle.parentNode)
            handle = handle.parentNode;
          handle.focus();
          this.activeHandle    = handle;
          this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
          this.updateStyles();

          var offsets  = Position.cumulativeOffset(this.activeHandle);
          this.offsetX = (pointer[0] - offsets[0]);
          this.offsetY = (pointer[1] - offsets[1]);
      }
      else if(!this.disabled)
      {
          var pointer  = [Event.pointerX(event), Event.pointerY(event)];
          // find the handle (prevents issues with Safari)
          while((this.handles.indexOf(handle) == -1) && handle.parentNode)
            handle = handle.parentNode;

          this.activeHandle    = handle;
          this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
          var offsets  = Position.cumulativeOffset(this.activeHandle);

          this.offsetX = 0;
          this.offsetY = 0;
          this.draw(event);
          this.sliderActif = true;
          if(this.initialized && this.options.onChange)
            this.options.onChange(this.values.length>1 ? this.values : this.value, this);
      }
      Event.stop(event);
    }
  },
  update: function(event) {
   if(this.active) {
      if(!this.dragging) this.dragging = true;
      this.draw(event);
      // fix AppleWebKit rendering
      if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
      Event.stop(event);
   }
  },
  draw: function(event) {
    var pointer = [Event.pointerX(event), Event.pointerY(event)];
    var offsets = [0,0];
    if (typeof(this.track.offsetParent) != "unknown")
    	offsets = Position.cumulativeOffset(this.track);
    var scrollOffset = [0,0];
    pointer[0] -= this.offsetX + offsets[0]+scrollOffset[0];
    pointer[1] -= this.offsetY + offsets[1]+scrollOffset[1];
    this.event = event;
    this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
    if(this.initialized && this.options.onSlide)
      this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
  },
  endDrag: function(event) {
    if(this.active && this.dragging) {
      this.finishDrag(event, true);
      Event.stop(event);
    }
    this.sliderActif = false;
    this.active = false;
    this.dragging = false;
  },
  finishDrag: function(event, success) {
    this.active = false;
    this.dragging = false;
    this.updateFinished();
    this.sliderActif = false;
  },
  updateFinished: function() {
    if(this.initialized && this.options.onChange)
      this.options.onChange(this.values.length>1 ? this.values : this.value, this);
    this.event = null;
  },
  setValeurPas: function(dValue,_pas) {
                var pas = this.step
                if (_pas!=null)
                    pas = _pas;
  		var decalage = 0;
  		if (!this.isVertical() && this.direction=="up")
  			decalage = this.range.start;
		var dNbPas = Math.floor(dValue / pas);
		var dNbPasMax = Math.floor(this.range.end / pas);
		var dNbPasMin = Math.floor(this.range.start / pas);
		var dDeltaTest = pas;
		var dDeltaPasEntier = dValue % pas;
		if(dNbPas == dNbPasMax)
		{
			dDeltaTest = this.range.end - dNbPasMax * pas;
			dDeltaPasEntier = dValue - dNbPasMax * pas;
		}
		else
		{
			if(dNbPas == dNbPasMin)
			{
				dDeltaTest = (dNbPasMin + 1.0) * pas - this.range.start;
				dDeltaPasEntier = dValue - this.range.start;
			}
		}
		if(dDeltaPasEntier > dDeltaTest / 2.0)
		{
			return (dNbPas + 1.0) * pas-decalage;
		}
		else
		{
			return dNbPas * pas-decalage;
		}
	},
	setBorneMin:function(min)
	{
		this.minimum = min;
	},
	setBorneMax:function(max)
	{
		this.maximum = max;
	},
	getScrollOffset:function(element)
	{
		var valueT = 0, valueL = 0;
    	do {
      	valueT -= element.scrollTop  || 0;
      	valueL -= element.scrollLeft || 0;
    	} while (element = element.parentNode);

    	return [valueL, valueT];
	},
	chkDHTM : function()
	{
		var x = document.body || null;
		this.isIE = x && typeof x.insertAdjacentHTML != "undefined";
		var jg_dom = (x && !jg_ie &&
			typeof x.appendChild != "undefined" &&
			typeof document.createRange != "undefined" &&
			typeof (i = document.createRange()).setStartBefore != "undefined" &&
			typeof i.createContextualFragment != "undefined");
		this.isMoz = jg_dom && typeof x.style.MozOpacity != "undefined";
	}
}