jquery.ui.slider-1.12.1-rtl.js

/*!
 * jQuery UI Slider 1.12.1 RTL Based on the Original 1.12.1
 * and Keith Wood wood.keith{at}optusnet.com.au version based on 1.8.9 which help for this one
 *
 * http://jqueryui.com and http://keith-wood.name/rtlsliders.html
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Slider
//>>group: Widgets
//>>description: Displays a flexible slider with ranges and accessibility via keyboard.
//>>docs: http://api.jqueryui.com/slider/
//>>demos: http://jqueryui.com/slider/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/slider.css
//>>css.theme: ../../themes/base/theme.css

( function( factory ) {
  if ( typeof define === "function" && define.amd ) {

    // AMD. Register as an anonymous module.
    define( [
      "jquery",
      "./mouse",
      "../keycode",
      "../version",
      "../widget"
    ], factory );
  } else {

    // Browser globals
    factory( jQuery );
  }
}( function( $ ) {

  return $.widget( "ui.slider", $.ui.mouse, {
    version: "1.12.1",
    widgetEventPrefix: "slide",

    options: {
      animate: false,
      classes: {
        "ui-slider": "ui-corner-all",
        "ui-slider-handle": "ui-corner-all",

        // Note: ui-widget-header isn't the most fittingly semantic framework class for this
        // element, but worked best visually with a variety of themes
        "ui-slider-range": "ui-corner-all ui-widget-header"
      },
      distance: 0,
      max: 100,
      min: 0,
      orientation: "horizontal",
      isRTL: false, // RTL
      range: false,
      step: 1,
      value: 0,
      values: null,

      // Callbacks
      change: null,
      slide: null,
      start: null,
      stop: null
    },

    // Number of pages in a slider
    // (how many times can you page up/down to go through the whole range)
    numPages: 5,

    _create: function() {
      var o = this.options;
      this._keySliding = false;
      this._mouseSliding = false;
      this._animateOff = true;
      this._handleIndex = null;
      this._detectOrientation();
      this._mouseInit();
      this._calculateNewMax();

      this._addClass( "ui-slider ui-slider-" + this.orientation + ( o.isRTL ? " ui-slider-rtl" : "" ) + // RTL,
        "ui-widget ui-widget-content" );

      this._refresh();

      this._animateOff = false;
    },

    _refresh: function() {
      this._createRange();
      this._createHandles();
      this._setupEvents();
      this._refreshValue();
    },

    _createHandles: function() {
      var i, handleCount,
        options = this.options,
        existingHandles = this.element.find( ".ui-slider-handle" ),
        handle = "<span tabindex='0'></span>",
        handles = [];

      handleCount = ( options.values && options.values.length ) || 1;

      if ( existingHandles.length > handleCount ) {
        existingHandles.slice( handleCount ).remove();
        existingHandles = existingHandles.slice( 0, handleCount );
      }

      for ( i = existingHandles.length; i < handleCount; i++ ) {
        handles.push( handle );
      }

      this.handles = existingHandles.add( $( handles.join( "" ) ).appendTo( this.element ) );

      this._addClass( this.handles, "ui-slider-handle", "ui-state-default" );

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

      this.handles.each( function( i ) {
        $( this )
          .data( "ui-slider-handle-index", i )
          .attr( "tabIndex", 0 );
      } );
    },

    _createRange: function() {
      var options = this.options;

      if ( options.range ) {
        if ( options.range === true ) {
          if ( !options.values ) {
            options.values = [ this._valueMin(), this._valueMin() ];
          } else if ( options.values.length && options.values.length !== 2 ) {
            options.values = [ options.values[ 0 ], options.values[ 0 ] ];
          } else if ( $.isArray( options.values ) ) {
            options.values = options.values.slice( 0 );
          }
        }

        if ( !this.range || !this.range.length ) {
          this.range = $( "<div>" )
            .appendTo( this.element );

          this._addClass( this.range, "ui-slider-range" );
        } else {
          this._removeClass( this.range, "ui-slider-range-min ui-slider-range-max" );

          // Handle range switching from true to min/max
          this.range.css( {
            "left": "",
            "bottom": ""
          } );
        }
        if ( options.range === "min" || options.range === "max" ) {
          this._addClass( this.range, "ui-slider-range-" + options.range );
        }
      } else {
        if ( this.range ) {
          this.range.remove();
        }
        this.range = null;
      }
    },

    _setupEvents: function() {
      this._off( this.handles );
      this._on( this.handles, this._handleEvents );
      this._hoverable( this.handles );
      this._focusable( this.handles );
    },

    _destroy: function() {
      this.handles.remove();
      if ( this.range ) {
        this.range.remove();
      }

      this._mouseDestroy();
    },

    _mouseCapture: function( event ) {
      var position, normValue, distance, closestHandle, index, allowed, offset, mouseOverHandle,
        that = this,
        o = this.options;

      if ( o.disabled ) {
        return false;
      }

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

      position = { x: event.pageX, y: event.pageY };
      normValue = this._normValueFromMouse( position );
      distance = this._valueMax() - this._valueMin() + 1;
      this.handles.each( function( i ) {
        var thisDistance = Math.abs( normValue - that.values( i ) );
        if ( ( distance > thisDistance ) ||
          ( distance === thisDistance &&
          ( i === that._lastChangedValue || that.values( i ) === o.min ) ) ) {
          distance = thisDistance;
          closestHandle = $( this );
          index = i;
        }
      } );

      allowed = this._start( event, index );
      if ( allowed === false ) {
        return false;
      }
      this._mouseSliding = true;

      this._handleIndex = index;

      this._addClass( closestHandle, null, "ui-state-active" );
      closestHandle.trigger( "focus" );

      offset = closestHandle.offset();
      mouseOverHandle = !$( event.target ).parents().addBack().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 )
      };

      if ( !this.handles.hasClass( "ui-state-hover" ) ) {
        this._slide( event, index, normValue );
      }
      this._animateOff = true;
      return true;
    },

    _mouseStart: function() {
      return true;
    },

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

      this._slide( event, this._handleIndex, normValue );

      return false;
    },

    _mouseStop: function( event ) {
      this._removeClass( this.handles, null, "ui-state-active" );
      this._mouseSliding = false;

      this._stop( event, this._handleIndex );
      this._change( event, this._handleIndex );

      this._handleIndex = null;
      this._clickOffset = null;
      this._animateOff = false;

      return false;
    },

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

    _normValueFromMouse: function( position ) {
      var pixelTotal,
        pixelMouse,
        percentMouse,
        valueTotal,
        valueMouse;

      if ( this.orientation === "horizontal" ) {
        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 );
      }

      percentMouse = ( pixelMouse / pixelTotal );
      if ( percentMouse > 1 ) {
        percentMouse = 1;
      }
      if ( percentMouse < 0 ) {
        percentMouse = 0;
      }
      if ( this.orientation === "vertical" ) {
        percentMouse = 1 - percentMouse;
      }
      if ( this.options.isRTL ) { // RTL
        percentMouse = 1 - percentMouse;
      }

      valueTotal = this._valueMax() - this._valueMin();
      valueMouse = this._valueMin() + percentMouse * valueTotal;

      return this._trimAlignValue( valueMouse );
    },

    _uiHash: function( index, value, values ) {
      var uiHash = {
        handle: this.handles[ index ],
        handleIndex: index,
        value: value !== undefined ? value : this.value()
      };

      if ( this._hasMultipleValues() ) {
        uiHash.value = value !== undefined ? value : this.values( index );
        uiHash.values = values || this.values();
      }

      return uiHash;
    },

    _hasMultipleValues: function() {
      return this.options.values && this.options.values.length;
    },

    _start: function( event, index ) {
      return this._trigger( "start", event, this._uiHash( index ) );
    },

    _slide: function( event, index, newVal ) {
      var allowed, otherVal,
        currentValue = this.value(),
        newValues = this.values();

      if ( this._hasMultipleValues() ) {
        otherVal = this.values( index ? 0 : 1 );
        currentValue = this.values( index );

        if ( this.options.values.length === 2 && this.options.range === true ) {
          newVal =  index === 0 ? Math.min( otherVal, newVal ) : Math.max( otherVal, newVal );
        }

        newValues[ index ] = newVal;
      }

      if ( newVal === currentValue ) {
        return;
      }

      allowed = this._trigger( "slide", event, this._uiHash( index, newVal, newValues ) );

      // A slide can be canceled by returning false from the slide callback
      if ( allowed === false ) {
        return;
      }

      if ( this._hasMultipleValues() ) {
        this.values( index, newVal );
      } else {
        this.value( newVal );
      }
    },

    _stop: function( event, index ) {
      this._trigger( "stop", event, this._uiHash( index ) );
    },

    _change: function( event, index ) {
      if ( !this._keySliding && !this._mouseSliding ) {

        //store the last changed value index for reference when handles overlap
        this._lastChangedValue = index;
        this._trigger( "change", event, this._uiHash( index ) );
      }
    },

    value: function( newValue ) {
      if ( arguments.length ) {
        this.options.value = this._trimAlignValue( newValue );
        this._refreshValue();
        this._change( null, 0 );
        return;
      }

      return this._value();
    },

    values: function( index, newValue ) {
      var vals,
        newValues,
        i;

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

      if ( arguments.length ) {
        if ( $.isArray( arguments[ 0 ] ) ) {
          vals = this.options.values;
          newValues = arguments[ 0 ];
          for ( i = 0; i < vals.length; i += 1 ) {
            vals[ i ] = this._trimAlignValue( newValues[ i ] );
            this._change( null, i );
          }
          this._refreshValue();
        } else {
          if ( this._hasMultipleValues() ) {
            return this._values( index );
          } else {
            return this.value();
          }
        }
      } else {
        return this._values();
      }
    },

    _setOption: function( key, value ) {
      var i,
        valsLength = 0;

      if ( key === "range" && this.options.range === true ) {
        if ( value === "min" ) {
          this.options.value = this._values( 0 );
          this.options.values = null;
        } else if ( value === "max" ) {
          this.options.value = this._values( this.options.values.length - 1 );
          this.options.values = null;
        }
      }

      if ( $.isArray( this.options.values ) ) {
        valsLength = this.options.values.length;
      }

      this._super( key, value );

      switch ( key ) {
        case "orientation":
          this._detectOrientation();
          this._removeClass( "ui-slider-horizontal ui-slider-vertical" )
            ._addClass( "ui-slider-" + this.orientation );
          this._refreshValue();
          if ( this.options.range ) {
            this._refreshRange( value );
          }

          // Reset positioning from previous orientation
          this.handles.css( value === "horizontal" ? "bottom" : "left", "" );
          break;
        case "isRTL": // RTL
          this.element.toggleClass( "ui-slider-rtl", value );
          this._refreshValue();
          break;
        case "value":
          this._animateOff = true;
          this._refreshValue();
          this._change( null, 0 );
          this._animateOff = false;
          break;
        case "values":
          this._animateOff = true;
          this._refreshValue();

          // Start from the last handle to prevent unreachable handles (#9046)
          for ( i = valsLength - 1; i >= 0; i-- ) {
            this._change( null, i );
          }
          this._animateOff = false;
          break;
        case "step":
        case "min":
        case "max":
          this._animateOff = true;
          this._calculateNewMax();
          this._refreshValue();
          this._animateOff = false;
          break;
        case "range":
          this._animateOff = true;
          this._refresh();
          this._animateOff = false;
          break;
      }
    },

    _setOptionDisabled: function( value ) {
      this._super( value );

      this._toggleClass( null, "ui-state-disabled", !!value );
    },

    //internal value getter
    // _value() returns value trimmed by min and max, aligned by step
    _value: function() {
      var val = this.options.value;
      val = this._trimAlignValue( val );

      return val;
    },

    //internal values getter
    // _values() returns array of values trimmed by min and max, aligned by step
    // _values( index ) returns single value trimmed by min and max, aligned by step
    _values: function( index ) {
      var val,
        vals,
        i;

      if ( arguments.length ) {
        val = this.options.values[ index ];
        val = this._trimAlignValue( val );

        return val;
      } else if ( this._hasMultipleValues() ) {

        // .slice() creates a copy of the array
        // this copy gets trimmed by min and max and then returned
        vals = this.options.values.slice();
        for ( i = 0; i < vals.length; i += 1 ) {
          vals[ i ] = this._trimAlignValue( vals[ i ] );
        }

        return vals;
      } else {
        return [];
      }
    },

    // Returns the step-aligned value that val is closest to, between (inclusive) min and max
    _trimAlignValue: function( val ) {
      if ( val <= this._valueMin() ) {
        return this._valueMin();
      }
      if ( val >= this._valueMax() ) {
        return this._valueMax();
      }
      var step = ( this.options.step > 0 ) ? this.options.step : 1,
        valModStep = ( val - this._valueMin() ) % step,
        alignValue = val - valModStep;

      if ( Math.abs( valModStep ) * 2 >= step ) {
        alignValue += ( valModStep > 0 ) ? step : ( -step );
      }

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

    _calculateNewMax: function() {
      var max = this.options.max,
        min = this._valueMin(),
        step = this.options.step,
        aboveMin = Math.round( ( max - min ) / step ) * step;
      max = aboveMin + min;
      if ( max > this.options.max ) {

        //If max is not divisible by step, rounding off may increase its value
        max -= step;
      }
      this.max = parseFloat( max.toFixed( this._precision() ) );
    },

    _precision: function() {
      var precision = this._precisionOf( this.options.step );
      if ( this.options.min !== null ) {
        precision = Math.max( precision, this._precisionOf( this.options.min ) );
      }
      return precision;
    },

    _precisionOf: function( num ) {
      var str = num.toString(),
        decimal = str.indexOf( "." );
      return decimal === -1 ? 0 : str.length - decimal - 1;
    },

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

    _valueMax: function() {
      return this.max;
    },

    _refreshRange: function( orientation ) {
      if ( orientation === "vertical" ) {
        this.range.css( { "width": "", "left": "" } );
      }
      if ( orientation === "horizontal" ) {
        this.range.css( { "height": "", "bottom": "" } );
      }
    },

    _refreshValue: function() {
      var lastValPercent, valPercent, value, valueMin, valueMax,
        oRange = this.options.range,
        o = this.options,
        that = this,
        animate = ( !this._animateOff ) ? o.animate : false,
        _set = {};

      if ( this._hasMultipleValues() ) {
        this.handles.each( function( i ) {
          valPercent = ( that.values( i ) - that._valueMin() ) / ( that._valueMax() -
            that._valueMin() ) * 100;
          valPercent = ( that.options.isRTL ? 100 - valPercent : valPercent ); // RTL
          _set[ that.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
          $( this ).stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );
          if ( that.options.range === true ) {
            if ( that.orientation === "horizontal" ) {
              if ( i === 0 ) {
                that.range.stop( 1, 1 )[ animate ? "animate" : "css" ](
                ( that.options.isRTL ? { right: ( 100 - valPercent ) + "%"} : // RTL
                  { left: valPercent + "%" } ), o.animate );
              }
              if ( i === 1 ) {
                that.range[ animate ? "animate" : "css" ]( {
                  width: ( ( that.options.isRTL ? -1 : +1 ) * ( valPercent - lastValPercent ) ) + "%" // RTL
                }, {
                  queue: false,
                  duration: o.animate
                } );
              }
            } else {
              if ( i === 0 ) {
                that.range.stop( 1, 1 )[ animate ? "animate" : "css" ](
                  that.options.isRTL ? { top: ( 100 - valPercent ) + "%" } : // RTL
                    { bottom: ( valPercent ) + "%" }, o.animate );
              }
              if ( i === 1 ) {
                that.range[ animate ? "animate" : "css" ]( {
                  height: ( ( that.options.isRTL ? -1 : +1 ) * ( valPercent - lastValPercent ) ) + "%" //RTL
                }, {
                  queue: false,
                  duration: o.animate
                } );
              }
            }
          }
          lastValPercent = valPercent;
        } );
      } else {
        value = this.value();
        valueMin = this._valueMin();
        valueMax = this._valueMax();
        valPercent = ( valueMax !== valueMin ) ?
          ( value - valueMin ) / ( valueMax - valueMin ) * 100 :
          0;
        valPercent = ( that.options.isRTL ? 100 - valPercent : valPercent ); // RTL
        _set[ this.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
        this.handle.stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );

        if ( oRange === "min" && this.orientation === "horizontal" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            width: ( that.options.isRTL ? 100 - valPercent : valPercent ) + "%" // RTL
          }, o.animate );
        }
        if ( oRange === "max" && this.orientation === "horizontal" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            width: (that.options.isRTL ? valPercent : 100 - valPercent ) + "%" // RTL
          }, o.animate );
        }
        if ( oRange === "min" && this.orientation === "vertical" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            height: ( that.options.isRTL ? 100 - valPercent : valPercent ) + "%" // RTL
          }, o.animate );
        }
        if ( oRange === "max" && this.orientation === "vertical" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            height: ( that.options.isRTL ? valPercent : 100 - valPercent ) + "%" // RTL
          }, o.animate );
        }
      }
    },

    _handleEvents: {
      keydown: function( event ) {
        var allowed, curVal, newVal, step,
          index = $( event.target ).data( "ui-slider-handle-index" );

        switch ( event.keyCode ) {
          case $.ui.keyCode.HOME:
          case $.ui.keyCode.END:
          case $.ui.keyCode.PAGE_UP:
          case $.ui.keyCode.PAGE_DOWN:
          case $.ui.keyCode.UP:
          case $.ui.keyCode.RIGHT:
          case $.ui.keyCode.DOWN:
          case $.ui.keyCode.LEFT:
            event.preventDefault();
            if ( !this._keySliding ) {
              this._keySliding = true;
              this._addClass( $( event.target ), null, "ui-state-active" );
              allowed = this._start( event, index );
              if ( allowed === false ) {
                return;
              }
            }
            break;
        }

        step = this.options.step;
        if ( this._hasMultipleValues() ) {
          curVal = newVal = this.values( index );
        } else {
          curVal = newVal = this.value();
        }

        var adjust = function( minMax, offset ) { // RTL
          if ( curVal === minMax ) {
            return;
          }
          newVal = self._trimAlignValue( curVal + offset );
        };

        switch ( event.keyCode ) {
          case $.ui.keyCode.HOME:
            newVal = this._valueMin();
            break;
          case $.ui.keyCode.END:
            newVal = this._valueMax();
            break;
          case $.ui.keyCode.PAGE_UP:
            newVal = this._trimAlignValue(
              curVal + ( ( this._valueMax() - this._valueMin() ) / this.numPages )
            );
            break;
          case $.ui.keyCode.PAGE_DOWN:
            newVal = this._trimAlignValue(
              curVal - ( ( this._valueMax() - this._valueMin() ) / this.numPages ) );
            break;
          case $.ui.keyCode.UP:
          case $.ui.keyCode.RIGHT:
            adjust( self.options.isRTL ? self._valueMin() : self._valueMax(), self.options.isRTL ? -step : step); // RTL
            break;
          case $.ui.keyCode.DOWN:
          case $.ui.keyCode.LEFT:
            adjust( self.options.isRTL ? self._valueMax(): self._valueMin(), self.options.isRTL ? step : -step ); // RTL
            break;
        }

        this._slide( event, index, newVal );
      },
      keyup: function( event ) {
        var index = $( event.target ).data( "ui-slider-handle-index" );

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

} ) );

Tks to @kbwood for his initial work on this here.