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Editing: jquery-minicolors.js

//
// jQuery MiniColors: A tiny color picker built on jQuery
//
// Developed by Cory LaViska for A Beautiful Site, LLC
//
// Licensed under the MIT license: http://opensource.org/licenses/MIT
//
(function (factory) {
  if(typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define(['jquery'], factory);
  } else if(typeof exports === 'object') {
    // Node/CommonJS
    module.exports = factory(require('jquery'));
  } else {
    // Browser globals
    factory(jQuery);
  }
}(function ($) {
  'use strict';

// Defaults
  $.minicolors = {
    defaults: {
      animationSpeed: 50,
      animationEasing: 'swing',
      change: null,
      changeDelay: 0,
      control: 'hue',
      defaultValue: '',
      format: 'hex',
      hide: null,
      hideSpeed: 100,
      inline: false,
      keywords: '',
      letterCase: 'lowercase',
      opacity: false,
      position: 'bottom',
      show: null,
      showSpeed: 100,
      theme: 'default',
      swatches: []
    }
  };

// Public methods
  $.extend($.fn, {
    minicolors: function(method, data) {

switch(method) {
        // Destroy the control
        case 'destroy':
          $(this).each(function() {
            destroy($(this));
          });
          return $(this);

// Hide the color picker
        case 'hide':
          hide();
          return $(this);

// Get/set opacity
        case 'opacity':
          // Getter
          if(data === undefined) {
            // Getter
            return $(this).attr('data-opacity');
          } else {
            // Setter
            $(this).each(function() {
              updateFromInput($(this).attr('data-opacity', data));
            });
          }
          return $(this);

// Get an RGB(A) object based on the current color/opacity
        case 'rgbObject':
          return rgbObject($(this), method === 'rgbaObject');

// Get an RGB(A) string based on the current color/opacity
        case 'rgbString':
        case 'rgbaString':
          return rgbString($(this), method === 'rgbaString');

// Get/set settings on the fly
        case 'settings':
          if(data === undefined) {
            return $(this).data('minicolors-settings');
          } else {
            // Setter
            $(this).each(function() {
              var settings = $(this).data('minicolors-settings') || {};
              destroy($(this));
              $(this).minicolors($.extend(true, settings, data));
            });
          }
          return $(this);

// Show the color picker
        case 'show':
          show($(this).eq(0));
          return $(this);

// Get/set the hex color value
        case 'value':
          if(data === undefined) {
            // Getter
            return $(this).val();
          } else {
            // Setter
            $(this).each(function() {
              if(typeof(data) === 'object' && data !== null) {
                if(data.opacity !== undefined) {
                  $(this).attr('data-opacity', keepWithin(data.opacity, 0, 1));
                }
                if(data.color) {
                  $(this).val(data.color);
                }
              } else {
                $(this).val(data);
              }
              updateFromInput($(this));
            });
          }
          return $(this);

// Initializes the control
        default:
          if(method !== 'create') data = method;
          $(this).each(function() {
            init($(this), data);
          });
          return $(this);

}

}
  });

// Initialize input elements
  function init(input, settings) {
    var minicolors = $('<div class="minicolors" />');
    var defaults = $.minicolors.defaults;
    var name;
    var size;
    var swatches;
    var swatch;
    var swatchString;
    var panel;
    var i;

// Do nothing if already initialized
    if(input.data('minicolors-initialized')) return;

// Handle settings
    settings = $.extend(true, {}, defaults, settings);

// The wrapper
    minicolors
      .addClass('minicolors-theme-' + settings.theme)
      .toggleClass('minicolors-with-opacity', settings.opacity);

// Custom positioning
    if(settings.position !== undefined) {
      $.each(settings.position.split(' '), function() {
        minicolors.addClass('minicolors-position-' + this);
      });
    }

// Input size
    if(settings.format === 'rgb') {
      size = settings.opacity ? '25' : '20';
    } else {
      size = settings.keywords ? '11' : '7';
    }

// The input
    input
      .addClass('minicolors-input')
      .data('minicolors-initialized', false)
      .data('minicolors-settings', settings)
      .prop('size', size)
      .wrap(minicolors)
      .after(
        '<div class="minicolors-panel minicolors-slider-' + settings.control + '">' +
                '<div class="minicolors-slider minicolors-sprite">' +
                  '<div class="minicolors-picker"></div>' +
                '</div>' +
                '<div class="minicolors-opacity-slider minicolors-sprite">' +
                  '<div class="minicolors-picker"></div>' +
                '</div>' +
                '<div class="minicolors-grid minicolors-sprite">' +
                  '<div class="minicolors-grid-inner"></div>' +
                  '<div class="minicolors-picker"><div></div></div>' +
                '</div>' +
              '</div>'
      );

// The swatch
    if(!settings.inline) {
      input.after('<span class="minicolors-swatch minicolors-sprite minicolors-input-swatch"><span class="minicolors-swatch-color"></span></span>');
      input.next('.minicolors-input-swatch').on('click', function(event) {
        event.preventDefault();
        input.trigger('focus');
      });
    }

// Prevent text selection in IE
    panel = input.parent().find('.minicolors-panel');
    panel.on('selectstart', function() { return false; }).end();

// Swatches
    if(settings.swatches && settings.swatches.length !== 0) {
      panel.addClass('minicolors-with-swatches');
      swatches = $('<ul class="minicolors-swatches"></ul>')
        .appendTo(panel);
      for(i = 0; i < settings.swatches.length; ++i) {
        // allow for custom objects as swatches
        if($.type(settings.swatches[i]) === 'object') {
          name = settings.swatches[i].name;
          swatch = settings.swatches[i].color;
        } else {
          name = '';
          swatch = settings.swatches[i];
        }
        swatchString = swatch;
        swatch = isRgb(swatch) ? parseRgb(swatch, true) : hex2rgb(parseHex(swatch, true));
        $('<li class="minicolors-swatch minicolors-sprite"><span class="minicolors-swatch-color" title="' + name + '"></span></li>')
          .appendTo(swatches)
          .data('swatch-color', swatchString)
          .find('.minicolors-swatch-color')
          .css({
            backgroundColor: rgb2hex(swatch),
            opacity: String(swatch.a)
          });
        settings.swatches[i] = swatch;
      }
    }

// Inline controls
    if(settings.inline) input.parent().addClass('minicolors-inline');

updateFromInput(input, false);

input.data('minicolors-initialized', true);
  }

// Returns the input back to its original state
  function destroy(input) {
    var minicolors = input.parent();

// Revert the input element
    input
      .removeData('minicolors-initialized')
      .removeData('minicolors-settings')
      .removeProp('size')
      .removeClass('minicolors-input');

// Remove the wrap and destroy whatever remains
    minicolors.before(input).remove();
  }

// Shows the specified dropdown panel
  function show(input) {
    var minicolors = input.parent();
    var panel = minicolors.find('.minicolors-panel');
    var settings = input.data('minicolors-settings');

// Do nothing if uninitialized, disabled, inline, or already open
    if(
      !input.data('minicolors-initialized') ||
      input.prop('disabled') ||
      minicolors.hasClass('minicolors-inline') ||
      minicolors.hasClass('minicolors-focus')
    ) return;

hide();

minicolors.addClass('minicolors-focus');
    if (panel.animate) {
      panel
        .stop(true, true)
        .fadeIn(settings.showSpeed, function () {
          if (settings.show) settings.show.call(input.get(0));
        });
    } else {
      panel.show();
      if (settings.show) settings.show.call(input.get(0));
    }
  }

// Hides all dropdown panels
  function hide() {
    $('.minicolors-focus').each(function() {
      var minicolors = $(this);
      var input = minicolors.find('.minicolors-input');
      var panel = minicolors.find('.minicolors-panel');
      var settings = input.data('minicolors-settings');

if (panel.animate) {
        panel.fadeOut(settings.hideSpeed, function () {
          if (settings.hide) settings.hide.call(input.get(0));
          minicolors.removeClass('minicolors-focus');
        });
      } else {
        panel.hide();
        if (settings.hide) settings.hide.call(input.get(0));
        minicolors.removeClass('minicolors-focus');
      }
    });
  }

// Moves the selected picker
  function move(target, event, animate) {
    var input = target.parents('.minicolors').find('.minicolors-input');
    var settings = input.data('minicolors-settings');
    var picker = target.find('[class$=-picker]');
    var offsetX = target.offset().left;
    var offsetY = target.offset().top;
    var x = Math.round(event.pageX - offsetX);
    var y = Math.round(event.pageY - offsetY);
    var duration = animate ? settings.animationSpeed : 0;
    var wx, wy, r, phi, styles;

// Touch support
    if(event.originalEvent.changedTouches) {
      x = event.originalEvent.changedTouches[0].pageX - offsetX;
      y = event.originalEvent.changedTouches[0].pageY - offsetY;
    }

// Constrain picker to its container
    if(x < 0) x = 0;
    if(y < 0) y = 0;
    if(x > target.width()) x = target.width();
    if(y > target.height()) y = target.height();

// Constrain color wheel values to the wheel
    if(target.parent().is('.minicolors-slider-wheel') && picker.parent().is('.minicolors-grid')) {
      wx = 75 - x;
      wy = 75 - y;
      r = Math.sqrt(wx * wx + wy * wy);
      phi = Math.atan2(wy, wx);
      if(phi < 0) phi += Math.PI * 2;
      if(r > 75) {
        r = 75;
        x = 75 - (75 * Math.cos(phi));
        y = 75 - (75 * Math.sin(phi));
      }
      x = Math.round(x);
      y = Math.round(y);
    }

// Move the picker
    styles = {
      top: y + 'px'
    };
    if(target.is('.minicolors-grid')) {
      styles.left = x + 'px';
    }
    if (picker.animate) {
      picker
        .stop(true)
        .animate(styles, duration, settings.animationEasing, function() {
          updateFromControl(input, target);
        });
    } else {
      picker
        .css(styles);
      updateFromControl(input, target);
    }
  }

// Sets the input based on the color picker values
  function updateFromControl(input, target) {

function getCoords(picker, container) {
      var left, top;
      if(!picker.length || !container) return null;
      left = picker.offset().left;
      top = picker.offset().top;

return {
        x: left - container.offset().left + (picker.outerWidth() / 2),
        y: top - container.offset().top + (picker.outerHeight() / 2)
      };
    }

var hue, saturation, brightness, x, y, r, phi;
    var hex = input.val();
    var opacity = input.attr('data-opacity');

// Helpful references
    var minicolors = input.parent();
    var settings = input.data('minicolors-settings');
    var swatch = minicolors.find('.minicolors-input-swatch');

// Panel objects
    var grid = minicolors.find('.minicolors-grid');
    var slider = minicolors.find('.minicolors-slider');
    var opacitySlider = minicolors.find('.minicolors-opacity-slider');

// Picker objects
    var gridPicker = grid.find('[class$=-picker]');
    var sliderPicker = slider.find('[class$=-picker]');
    var opacityPicker = opacitySlider.find('[class$=-picker]');

// Picker positions
    var gridPos = getCoords(gridPicker, grid);
    var sliderPos = getCoords(sliderPicker, slider);
    var opacityPos = getCoords(opacityPicker, opacitySlider);

// Handle colors
    if(target.is('.minicolors-grid, .minicolors-slider, .minicolors-opacity-slider')) {

// Determine HSB values
      switch(settings.control) {
        case 'wheel':
          // Calculate hue, saturation, and brightness
          x = (grid.width() / 2) - gridPos.x;
          y = (grid.height() / 2) - gridPos.y;
          r = Math.sqrt(x * x + y * y);
          phi = Math.atan2(y, x);
          if(phi < 0) phi += Math.PI * 2;
          if(r > 75) {
            r = 75;
            gridPos.x = 69 - (75 * Math.cos(phi));
            gridPos.y = 69 - (75 * Math.sin(phi));
          }
          saturation = keepWithin(r / 0.75, 0, 100);
          hue = keepWithin(phi * 180 / Math.PI, 0, 360);
          brightness = keepWithin(100 - Math.floor(sliderPos.y * (100 / slider.height())), 0, 100);
          hex = hsb2hex({
            h: hue,
            s: saturation,
            b: brightness
          });

// Update UI
          slider.css('backgroundColor', hsb2hex({ h: hue, s: saturation, b: 100 }));
          break;

case 'saturation':
          // Calculate hue, saturation, and brightness
          hue = keepWithin(parseInt(gridPos.x * (360 / grid.width()), 10), 0, 360);
          saturation = keepWithin(100 - Math.floor(sliderPos.y * (100 / slider.height())), 0, 100);
          brightness = keepWithin(100 - Math.floor(gridPos.y * (100 / grid.height())), 0, 100);
          hex = hsb2hex({
            h: hue,
            s: saturation,
            b: brightness
          });

// Update UI
          slider.css('backgroundColor', hsb2hex({ h: hue, s: 100, b: brightness }));
          minicolors.find('.minicolors-grid-inner').css('opacity', saturation / 100);
          break;

case 'brightness':
          // Calculate hue, saturation, and brightness
          hue = keepWithin(parseInt(gridPos.x * (360 / grid.width()), 10), 0, 360);
          saturation = keepWithin(100 - Math.floor(gridPos.y * (100 / grid.height())), 0, 100);
          brightness = keepWithin(100 - Math.floor(sliderPos.y * (100 / slider.height())), 0, 100);
          hex = hsb2hex({
            h: hue,
            s: saturation,
            b: brightness
          });

// Update UI
          slider.css('backgroundColor', hsb2hex({ h: hue, s: saturation, b: 100 }));
          minicolors.find('.minicolors-grid-inner').css('opacity', 1 - (brightness / 100));
          break;

default:
          // Calculate hue, saturation, and brightness
          hue = keepWithin(360 - parseInt(sliderPos.y * (360 / slider.height()), 10), 0, 360);
          saturation = keepWithin(Math.floor(gridPos.x * (100 / grid.width())), 0, 100);
          brightness = keepWithin(100 - Math.floor(gridPos.y * (100 / grid.height())), 0, 100);
          hex = hsb2hex({
            h: hue,
            s: saturation,
            b: brightness
          });

// Update UI
          grid.css('backgroundColor', hsb2hex({ h: hue, s: 100, b: 100 }));
          break;
      }

// Handle opacity
      if(settings.opacity) {
        opacity = parseFloat(1 - (opacityPos.y / opacitySlider.height())).toFixed(2);
      } else {
        opacity = 1;
      }

updateInput(input, hex, opacity);
    }
    else {
      // Set swatch color
      swatch.find('span').css({
        backgroundColor: hex,
        opacity: String(opacity)
      });

// Handle change event
      doChange(input, hex, opacity);
    }
  }

// Sets the value of the input and does the appropriate conversions
  // to respect settings, also updates the swatch
  function updateInput(input, value, opacity) {
    var rgb;

// Helpful references
    var minicolors = input.parent();
    var settings = input.data('minicolors-settings');
    var swatch = minicolors.find('.minicolors-input-swatch');

if(settings.opacity) input.attr('data-opacity', opacity);

// Set color string
    if(settings.format === 'rgb') {
      // Returns RGB(A) string

// Checks for input format and does the conversion
      if(isRgb(value)) {
        rgb = parseRgb(value, true);
      }
      else {
        rgb = hex2rgb(parseHex(value, true));
      }

opacity = input.attr('data-opacity') === '' ? 1 : keepWithin(parseFloat(input.attr('data-opacity')).toFixed(2), 0, 1);
      if(isNaN(opacity) || !settings.opacity) opacity = 1;

if(input.minicolors('rgbObject').a <= 1 && rgb && settings.opacity) {
        // Set RGBA string if alpha
        value = 'rgba(' + rgb.r + ', ' + rgb.g + ', ' + rgb.b + ', ' + parseFloat(opacity) + ')';
      } else {
        // Set RGB string (alpha = 1)
        value = 'rgb(' + rgb.r + ', ' + rgb.g + ', ' + rgb.b + ')';
      }
    } else {
      // Returns hex color

// Checks for input format and does the conversion
      if(isRgb(value)) {
        value = rgbString2hex(value);
      }

value = convertCase(value, settings.letterCase);
    }

// Update value from picker
    input.val(value);

// Set swatch color
    swatch.find('span').css({
      backgroundColor: value,
      opacity: String(opacity)
    });

// Handle change event
    doChange(input, value, opacity);
  }

// Sets the color picker values from the input
  function updateFromInput(input, preserveInputValue) {
    var hex, hsb, opacity, keywords, alpha, value, x, y, r, phi;

// Helpful references
    var minicolors = input.parent();
    var settings = input.data('minicolors-settings');
    var swatch = minicolors.find('.minicolors-input-swatch');

// Panel objects
    var grid = minicolors.find('.minicolors-grid');
    var slider = minicolors.find('.minicolors-slider');
    var opacitySlider = minicolors.find('.minicolors-opacity-slider');

// Picker objects
    var gridPicker = grid.find('[class$=-picker]');
    var sliderPicker = slider.find('[class$=-picker]');
    var opacityPicker = opacitySlider.find('[class$=-picker]');

// Determine hex/HSB values
    if(isRgb(input.val())) {
      // If input value is a rgb(a) string, convert it to hex color and update opacity
      hex = rgbString2hex(input.val());
      alpha = keepWithin(parseFloat(getAlpha(input.val())).toFixed(2), 0, 1);
      if(alpha) {
        input.attr('data-opacity', alpha);
      }
    } else {
      hex = convertCase(parseHex(input.val(), true), settings.letterCase);
    }

if(!hex){
      hex = convertCase(parseInput(settings.defaultValue, true), settings.letterCase);
    }
    hsb = hex2hsb(hex);

// Get array of lowercase keywords
    keywords = !settings.keywords ? [] : $.map(settings.keywords.split(','), function(a) {
      return $.trim(a.toLowerCase());
    });

// Set color string
    if(input.val() !== '' && $.inArray(input.val().toLowerCase(), keywords) > -1) {
      value = convertCase(input.val());
    } else {
      value = isRgb(input.val()) ? parseRgb(input.val()) : hex;
    }

// Update input value
    if(!preserveInputValue) input.val(value);

// Determine opacity value
    if(settings.opacity) {
      // Get from data-opacity attribute and keep within 0-1 range
      opacity = input.attr('data-opacity') === '' ? 1 : keepWithin(parseFloat(input.attr('data-opacity')).toFixed(2), 0, 1);
      if(isNaN(opacity)) opacity = 1;
      input.attr('data-opacity', opacity);
      swatch.find('span').css('opacity', String(opacity));

// Set opacity picker position
      y = keepWithin(opacitySlider.height() - (opacitySlider.height() * opacity), 0, opacitySlider.height());
      opacityPicker.css('top', y + 'px');
    }

// Set opacity to zero if input value is transparent
    if(input.val().toLowerCase() === 'transparent') {
      swatch.find('span').css('opacity', String(0));
    }

// Update swatch
    swatch.find('span').css('backgroundColor', hex);

// Determine picker locations
    switch(settings.control) {
      case 'wheel':
        // Set grid position
        r = keepWithin(Math.ceil(hsb.s * 0.75), 0, grid.height() / 2);
        phi = hsb.h * Math.PI / 180;
        x = keepWithin(75 - Math.cos(phi) * r, 0, grid.width());
        y = keepWithin(75 - Math.sin(phi) * r, 0, grid.height());
        gridPicker.css({
          top: y + 'px',
          left: x + 'px'
        });

// Set slider position
        y = 150 - (hsb.b / (100 / grid.height()));
        if(hex === '') y = 0;
        sliderPicker.css('top', y + 'px');
        
        // Update panel color
        slider.css('backgroundColor', hsb2hex({ h: hsb.h, s: hsb.s, b: 100 }));
        break;

case 'saturation':
        // Set grid position
        x = keepWithin((5 * hsb.h) / 12, 0, 150);
        y = keepWithin(grid.height() - Math.ceil(hsb.b / (100 / grid.height())), 0, grid.height());
        gridPicker.css({
          top: y + 'px',
          left: x + 'px'
        });

// Set slider position
        y = keepWithin(slider.height() - (hsb.s * (slider.height() / 100)), 0, slider.height());
        sliderPicker.css('top', y + 'px');

// Update UI
        slider.css('backgroundColor', hsb2hex({ h: hsb.h, s: 100, b: hsb.b }));
        minicolors.find('.minicolors-grid-inner').css('opacity', hsb.s / 100);
        break;

case 'brightness':
        // Set grid position
        x = keepWithin((5 * hsb.h) / 12, 0, 150);
        y = keepWithin(grid.height() - Math.ceil(hsb.s / (100 / grid.height())), 0, grid.height());
        gridPicker.css({
          top: y + 'px',
          left: x + 'px'
        });

// Set slider position
        y = keepWithin(slider.height() - (hsb.b * (slider.height() / 100)), 0, slider.height());
        sliderPicker.css('top', y + 'px');

// Update UI
        slider.css('backgroundColor', hsb2hex({ h: hsb.h, s: hsb.s, b: 100 }));
        minicolors.find('.minicolors-grid-inner').css('opacity', 1 - (hsb.b / 100));
        break;

default:
        // Set grid position
        x = keepWithin(Math.ceil(hsb.s / (100 / grid.width())), 0, grid.width());
        y = keepWithin(grid.height() - Math.ceil(hsb.b / (100 / grid.height())), 0, grid.height());
        gridPicker.css({
          top: y + 'px',
          left: x + 'px'
        });

// Set slider position
        y = keepWithin(slider.height() - (hsb.h / (360 / slider.height())), 0, slider.height());
        sliderPicker.css('top', y + 'px');

// Update panel color
        grid.css('backgroundColor', hsb2hex({ h: hsb.h, s: 100, b: 100 }));
        break;
    }

// Fire change event, but only if minicolors is fully initialized
    if(input.data('minicolors-initialized')) {
      doChange(input, value, opacity);
    }
  }

// Runs the change and changeDelay callbacks
  function doChange(input, value, opacity) {
    var settings = input.data('minicolors-settings');
    var lastChange = input.data('minicolors-lastChange');
    var obj, sel, i;

// Only run if it actually changed
    if(!lastChange || lastChange.value !== value || lastChange.opacity !== opacity) {

// Remember last-changed value
      input.data('minicolors-lastChange', {
        value: value,
        opacity: opacity
      });

// Check and select applicable swatch
      if(settings.swatches && settings.swatches.length !== 0) {
        if(!isRgb(value)) {
          obj = hex2rgb(value);
        }
        else {
          obj = parseRgb(value, true);
        }
        sel = -1;
        for(i = 0; i < settings.swatches.length; ++i) {
          if(obj.r === settings.swatches[i].r && obj.g === settings.swatches[i].g && obj.b === settings.swatches[i].b && obj.a === settings.swatches[i].a) {
            sel = i;
            break;
          }
        }

input.parent().find('.minicolors-swatches .minicolors-swatch').removeClass('selected');
        if(sel !== -1) {
          input.parent().find('.minicolors-swatches .minicolors-swatch').eq(i).addClass('selected');
        }
      }

// Fire change event
      if(settings.change) {
        if(settings.changeDelay) {
          // Call after a delay
          clearTimeout(input.data('minicolors-changeTimeout'));
          input.data('minicolors-changeTimeout', setTimeout(function() {
            settings.change.call(input.get(0), value, opacity);
          }, settings.changeDelay));
        } else {
          // Call immediately
          settings.change.call(input.get(0), value, opacity);
        }
      }
      input.trigger('change').trigger('input');
    }
  }

// Generates an RGB(A) object based on the input's value
  function rgbObject(input) {
    var rgb,
      opacity = $(input).attr('data-opacity');
    if( isRgb($(input).val()) ) {
      rgb = parseRgb($(input).val(), true);
    } else {
      var hex = parseHex($(input).val(), true);
      rgb = hex2rgb(hex);
    }
    if( !rgb ) return null;
    if( opacity !== undefined ) $.extend(rgb, { a: parseFloat(opacity) });
    return rgb;
  }

// Generates an RGB(A) string based on the input's value
  function rgbString(input, alpha) {
    var rgb,
      opacity = $(input).attr('data-opacity');
    if( isRgb($(input).val()) ) {
      rgb = parseRgb($(input).val(), true);
    } else {
      var hex = parseHex($(input).val(), true);
      rgb = hex2rgb(hex);
    }
    if( !rgb ) return null;
    if( opacity === undefined ) opacity = 1;
    if( alpha ) {
      return 'rgba(' + rgb.r + ', ' + rgb.g + ', ' + rgb.b + ', ' + parseFloat(opacity) + ')';
    } else {
      return 'rgb(' + rgb.r + ', ' + rgb.g + ', ' + rgb.b + ')';
    }
  }

// Converts to the letter case specified in settings
  function convertCase(string, letterCase) {
    return letterCase === 'uppercase' ? string.toUpperCase() : string.toLowerCase();
  }

// Parses a string and returns a valid hex string when possible
  function parseHex(string, expand) {
    string = string.replace(/^#/g, '');
    if(!string.match(/^[A-F0-9]{3,6}/ig)) return '';
    if(string.length !== 3 && string.length !== 6) return '';
    if(string.length === 3 && expand) {
      string = string[0] + string[0] + string[1] + string[1] + string[2] + string[2];
    }
    return '#' + string;
  }

// Parses a string and returns a valid RGB(A) string when possible
  function parseRgb(string, obj) {
    var values = string.replace(/[^\d,.]/g, '');
    var rgba = values.split(',');

rgba[0] = keepWithin(parseInt(rgba[0], 10), 0, 255);
    rgba[1] = keepWithin(parseInt(rgba[1], 10), 0, 255);
    rgba[2] = keepWithin(parseInt(rgba[2], 10), 0, 255);
    if(rgba[3] !== undefined) {
      rgba[3] = keepWithin(parseFloat(rgba[3], 10), 0, 1);
    }

// Return RGBA object
    if( obj ) {
      if (rgba[3] !== undefined) {
        return {
          r: rgba[0],
          g: rgba[1],
          b: rgba[2],
          a: rgba[3]
        };
      } else {
        return {
          r: rgba[0],
          g: rgba[1],
          b: rgba[2]
        };
      }
    }

// Return RGBA string
    if(typeof(rgba[3]) !== 'undefined' && rgba[3] <= 1) {
      return 'rgba(' + rgba[0] + ', ' + rgba[1] + ', ' + rgba[2] + ', ' + rgba[3] + ')';
    } else {
      return 'rgb(' + rgba[0] + ', ' + rgba[1] + ', ' + rgba[2] + ')';
    }

}

// Parses a string and returns a valid color string when possible
  function parseInput(string, expand) {
    if(isRgb(string)) {
      // Returns a valid rgb(a) string
      return parseRgb(string);
    } else {
      return parseHex(string, expand);
    }
  }

// Keeps value within min and max
  function keepWithin(value, min, max) {
    if(value < min) value = min;
    if(value > max) value = max;
    return value;
  }

// Checks if a string is a valid RGB(A) string
  function isRgb(string) {
    var rgb = string.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i);
    return (rgb && rgb.length === 4) ? true : false;
  }

// Function to get alpha from a RGB(A) string
  function getAlpha(rgba) {
    rgba = rgba.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+(\.\d{1,2})?|\.\d{1,2})[\s+]?/i);
    return (rgba && rgba.length === 6) ? rgba[4] : '1';
  }

// Converts an HSB object to an RGB object
  function hsb2rgb(hsb) {
    var rgb = {};
    var h = Math.round(hsb.h);
    var s = Math.round(hsb.s * 255 / 100);
    var v = Math.round(hsb.b * 255 / 100);
    if(s === 0) {
      rgb.r = rgb.g = rgb.b = v;
    } else {
      var t1 = v;
      var t2 = (255 - s) * v / 255;
      var t3 = (t1 - t2) * (h % 60) / 60;
      if(h === 360) h = 0;
      if(h < 60) { rgb.r = t1; rgb.b = t2; rgb.g = t2 + t3; }
      else if(h < 120) {rgb.g = t1; rgb.b = t2; rgb.r = t1 - t3; }
      else if(h < 180) {rgb.g = t1; rgb.r = t2; rgb.b = t2 + t3; }
      else if(h < 240) {rgb.b = t1; rgb.r = t2; rgb.g = t1 - t3; }
      else if(h < 300) {rgb.b = t1; rgb.g = t2; rgb.r = t2 + t3; }
      else if(h < 360) {rgb.r = t1; rgb.g = t2; rgb.b = t1 - t3; }
      else { rgb.r = 0; rgb.g = 0; rgb.b = 0; }
    }
    return {
      r: Math.round(rgb.r),
      g: Math.round(rgb.g),
      b: Math.round(rgb.b)
    };
  }

// Converts an RGB string to a hex string
  function rgbString2hex(rgb){
    rgb = rgb.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i);
    return (rgb && rgb.length === 4) ? '#' +
      ('0' + parseInt(rgb[1],10).toString(16)).slice(-2) +
      ('0' + parseInt(rgb[2],10).toString(16)).slice(-2) +
      ('0' + parseInt(rgb[3],10).toString(16)).slice(-2) : '';
  }

// Converts an RGB object to a hex string
  function rgb2hex(rgb) {
    var hex = [
      rgb.r.toString(16),
      rgb.g.toString(16),
      rgb.b.toString(16)
    ];
    $.each(hex, function(nr, val) {
      if(val.length === 1) hex[nr] = '0' + val;
    });
    return '#' + hex.join('');
  }

// Converts an HSB object to a hex string
  function hsb2hex(hsb) {
    return rgb2hex(hsb2rgb(hsb));
  }

// Converts a hex string to an HSB object
  function hex2hsb(hex) {
    var hsb = rgb2hsb(hex2rgb(hex));
    if(hsb.s === 0) hsb.h = 360;
    return hsb;
  }

// Converts an RGB object to an HSB object
  function rgb2hsb(rgb) {
    var hsb = { h: 0, s: 0, b: 0 };
    var min = Math.min(rgb.r, rgb.g, rgb.b);
    var max = Math.max(rgb.r, rgb.g, rgb.b);
    var delta = max - min;
    hsb.b = max;
    hsb.s = max !== 0 ? 255 * delta / max : 0;
    if(hsb.s !== 0) {
      if(rgb.r === max) {
        hsb.h = (rgb.g - rgb.b) / delta;
      } else if(rgb.g === max) {
        hsb.h = 2 + (rgb.b - rgb.r) / delta;
      } else {
        hsb.h = 4 + (rgb.r - rgb.g) / delta;
      }
    } else {
      hsb.h = -1;
    }
    hsb.h *= 60;
    if(hsb.h < 0) {
      hsb.h += 360;
    }
    hsb.s *= 100/255;
    hsb.b *= 100/255;
    return hsb;
  }

// Converts a hex string to an RGB object
  function hex2rgb(hex) {
    hex = parseInt(((hex.indexOf('#') > -1) ? hex.substring(1) : hex), 16);
    return {
      r: hex >> 16,
      g: (hex & 0x00FF00) >> 8,
      b: (hex & 0x0000FF)
    };
  }

// Handle events
  $([document])
    // Hide on clicks outside of the control
    .on('mousedown.minicolors touchstart.minicolors', function(event) {
      if(!$(event.target).parents().add(event.target).hasClass('minicolors')) {
        hide();
      }
    })
    // Start moving
    .on('mousedown.minicolors touchstart.minicolors', '.minicolors-grid, .minicolors-slider, .minicolors-opacity-slider', function(event) {
      var target = $(this);
      event.preventDefault();
      $(event.delegateTarget).data('minicolors-target', target);
      move(target, event, true);
    })
    // Move pickers
    .on('mousemove.minicolors touchmove.minicolors', function(event) {
      var target = $(event.delegateTarget).data('minicolors-target');
      if(target) move(target, event);
    })
    // Stop moving
    .on('mouseup.minicolors touchend.minicolors', function() {
      $(this).removeData('minicolors-target');
    })
    // Selected a swatch
    .on('click.minicolors', '.minicolors-swatches li', function(event) {
      event.preventDefault();
      var target = $(this), input = target.parents('.minicolors').find('.minicolors-input'), color = target.data('swatch-color');
      updateInput(input, color, getAlpha(color));
      updateFromInput(input);
    })
    // Show panel when swatch is clicked
    .on('mousedown.minicolors touchstart.minicolors', '.minicolors-input-swatch', function(event) {
      var input = $(this).parent().find('.minicolors-input');
      event.preventDefault();
      show(input);
    })
    // Show on focus
    .on('focus.minicolors', '.minicolors-input', function() {
      var input = $(this);
      if(!input.data('minicolors-initialized')) return;
      show(input);
    })
    // Update value on blur
    .on('blur.minicolors', '.minicolors-input', function() {
      var input = $(this);
      var settings = input.data('minicolors-settings');
      var keywords;
      var hex;
      var rgba;
      var swatchOpacity;
      var value;

if(!input.data('minicolors-initialized')) return;

// Get array of lowercase keywords
      keywords = !settings.keywords ? [] : $.map(settings.keywords.split(','), function(a) {
        return $.trim(a.toLowerCase());
      });

// Set color string
      if(input.val() !== '' && $.inArray(input.val().toLowerCase(), keywords) > -1) {
        value = input.val();
      } else {
        // Get RGBA values for easy conversion
        if(isRgb(input.val())) {
          rgba = parseRgb(input.val(), true);
        } else {
          hex = parseHex(input.val(), true);
          rgba = hex ? hex2rgb(hex) : null;
        }

// Convert to format
        if(rgba === null) {
          value = settings.defaultValue;
        } else if(settings.format === 'rgb') {
          value = settings.opacity ?
            parseRgb('rgba(' + rgba.r + ',' + rgba.g + ',' + rgba.b + ',' + input.attr('data-opacity') + ')') :
            parseRgb('rgb(' + rgba.r + ',' + rgba.g + ',' + rgba.b + ')');
        } else {
          value = rgb2hex(rgba);
        }
      }

// Update swatch opacity
      swatchOpacity = settings.opacity ? input.attr('data-opacity') : 1;
      if(value.toLowerCase() === 'transparent') swatchOpacity = 0;
      input
        .closest('.minicolors')
        .find('.minicolors-input-swatch > span')
        .css('opacity', String(swatchOpacity));

// Set input value
      input.val(value);

// Is it blank?
      if(input.val() === '') input.val(parseInput(settings.defaultValue, true));

// Adjust case
      input.val(convertCase(input.val(), settings.letterCase));

})
    // Handle keypresses
    .on('keydown.minicolors', '.minicolors-input', function(event) {
      var input = $(this);
      if(!input.data('minicolors-initialized')) return;
      switch(event.which) {
        case 9: // tab
          hide();
          break;
        case 13: // enter
        case 27: // esc
          hide();
          input.blur();
          break;
      }
    })
    // Update on keyup
    .on('keyup.minicolors', '.minicolors-input', function() {
      var input = $(this);
      if(!input.data('minicolors-initialized')) return;
      updateFromInput(input, true);
    })
    // Update on paste
    .on('paste.minicolors', '.minicolors-input', function() {
      var input = $(this);
      if(!input.data('minicolors-initialized')) return;
      setTimeout(function() {
        updateFromInput(input, true);
      }, 1);
    });
}));

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