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Filename : icheck.js
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/*!

 * iCheck v1.0.1, http://git.io/arlzeA

 * =================================

 * Powerful jQuery and Zepto plugin for checkboxes and radio buttons customization

 *

 * (c) 2013 Damir Sultanov, http://fronteed.com

 * MIT Licensed

 */



(function($) {



  // Cached vars

  var _iCheck = 'iCheck',

    _iCheckHelper = _iCheck + '-helper',

    _checkbox = 'checkbox',

    _radio = 'radio',

    _checked = 'checked',

    _unchecked = 'un' + _checked,

    _disabled = 'disabled',

    _determinate = 'determinate',

    _indeterminate = 'in' + _determinate,

    _update = 'update',

    _type = 'type',

    _click = 'click',

    _touch = 'touchbegin.i touchend.i',

    _add = 'addClass',

    _remove = 'removeClass',

    _callback = 'trigger',

    _label = 'label',

    _cursor = 'cursor',

    _mobile = /ipad|iphone|ipod|android|blackberry|windows phone|opera mini|silk/i.test(navigator.userAgent);



  // Plugin init

  $.fn[_iCheck] = function(options, fire) {



    // Walker

    var handle = 'input[type="' + _checkbox + '"], input[type="' + _radio + '"]',

      stack = $(),

      walker = function(object) {

        object.each(function() {

          var self = $(this);



          if (self.is(handle)) {

            stack = stack.add(self);

          } else {

            stack = stack.add(self.find(handle));

          }

        });

      };



    // Check if we should operate with some method

    if (/^(check|uncheck|toggle|indeterminate|determinate|disable|enable|update|destroy)$/i.test(options)) {



      // Normalize method's name

      options = options.toLowerCase();



      // Find checkboxes and radio buttons

      walker(this);



      return stack.each(function() {

        var self = $(this);



        if (options == 'destroy') {

          tidy(self, 'ifDestroyed');

        } else {

          operate(self, true, options);

        }

          // Fire method's callback

        if ($.isFunction(fire)) {

          fire();

        }

      });



    // Customization

    } else if (typeof options == 'object' || !options) {



      // Check if any options were passed

      var settings = $.extend({

          checkedClass: _checked,

          disabledClass: _disabled,

          indeterminateClass: _indeterminate,

          labelHover: true,

          aria: false

        }, options),



        selector = settings.handle,

        hoverClass = settings.hoverClass || 'hover',

        focusClass = settings.focusClass || 'focus',

        activeClass = settings.activeClass || 'active',

        labelHover = !!settings.labelHover,

        labelHoverClass = settings.labelHoverClass || 'hover',



        // Setup clickable area

        area = ('' + settings.increaseArea).replace('%', '') | 0;



      // Selector limit

      if (selector == _checkbox || selector == _radio) {

        handle = 'input[type="' + selector + '"]';

      }

        // Clickable area limit

      if (area < -50) {

        area = -50;

      }

        // Walk around the selector

      walker(this);



      return stack.each(function() {

        var self = $(this);



        // If already customized

        tidy(self);



        var node = this,

          id = node.id,



          // Layer styles

          offset = -area + '%',

          size = 100 + (area * 2) + '%',

          layer = {

            position: 'absolute',

            top: offset,

            left: offset,

            display: 'block',

            width: size,

            height: size,

            margin: 0,

            padding: 0,

            background: '#fff',

            border: 0,			

            opacity: 0

          },



          // Choose how to hide input

          hide = _mobile ? {

            position: 'absolute',

            visibility: 'hidden'

          } : area ? layer : {

            position: 'absolute',

            opacity: 0

          },



          // Get proper class

          className = node[_type] == _checkbox ? settings.checkboxClass || 'i' + _checkbox : settings.radioClass || 'i' + _radio,



          // Find assigned labels

          label = $(_label + '[for="' + id + '"]').add(self.closest(_label)),



          // Check ARIA option

          aria = !!settings.aria,



          // Set ARIA placeholder

          ariaID = _iCheck + '-' + Math.random().toString(36).replace('0.', ''),



          // Parent & helper

          parent = '<div class="' + className + '" ' + (aria ? 'role="' + node[_type] + '" ' : ''),

          helper;



        // Set ARIA "labelledby"

        if (label.length && aria) {

          label.each(function() {

            parent += 'aria-labelledby="';



            if (this.id) {

              parent += this.id;

            } else {

              this.id = ariaID;

              parent += ariaID;

            }



            parent += '"';

          });

        }

          // Wrap input

        parent = self.wrap(parent + '/>')[_callback]('ifCreated').parent().append(settings.insert);



        // Layer addition

        helper = $('<ins class="' + _iCheckHelper + '"/>').css(layer).appendTo(parent);



        // Finalize customization

        self.data(_iCheck, {o: settings, s: self.attr('style')}).css(hide);

        !!settings.inheritClass && parent[_add](node.className || '');

        !!settings.inheritID && id && parent.attr('id', _iCheck + '-' + id);

        parent.css('position') == 'static' && parent.css('position', 'relative');

        operate(self, true, _update);



        // Label events

        if (label.length) {

          label.on(_click + '.i mouseover.i mouseout.i ' + _touch, function(event) {

            var type = event[_type],

              item = $(this);



            // Do nothing if input is disabled

            if (!node[_disabled]) {



              // Click

              if (type == _click) {

                if ($(event.target).is('a')) {

                  return;

                }

                operate(self, false, true);



              // Hover state

              } else if (labelHover) {



                // mouseout|touchend

                if (/ut|nd/.test(type)) {

                  parent[_remove](hoverClass);

                  item[_remove](labelHoverClass);

                } else {

                  parent[_add](hoverClass);

                  item[_add](labelHoverClass);

                }

              }

                if (_mobile) {

                event.stopPropagation();

              } else {

                return false;

              }

            }

          });

        }

          // Input events

        self.on(_click + '.i focus.i blur.i keyup.i keydown.i keypress.i', function(event) {

          var type = event[_type],

            key = event.keyCode;



          // Click

          if (type == _click) {

            return false;



          // Keydown

          } else if (type == 'keydown' && key == 32) {

            if (!(node[_type] == _radio && node[_checked])) {

              if (node[_checked]) {

                off(self, _checked);

              } else {

                on(self, _checked);

              }

            }

              return false;



          // Keyup

          } else if (type == 'keyup' && node[_type] == _radio) {

            !node[_checked] && on(self, _checked);



          // Focus/blur

          } else if (/us|ur/.test(type)) {

            parent[type == 'blur' ? _remove : _add](focusClass);

          }

        });



        // Helper events

        helper.on(_click + ' mousedown mouseup mouseover mouseout ' + _touch, function(event) {

          var type = event[_type],



            // mousedown|mouseup

            toggle = /wn|up/.test(type) ? activeClass : hoverClass;



          // Do nothing if input is disabled

          if (!node[_disabled]) {



            // Click

            if (type == _click) {

              operate(self, false, true);



            // Active and hover states

            } else {



              // State is on

              if (/wn|er|in/.test(type)) {



                // mousedown|mouseover|touchbegin

                parent[_add](toggle);



              // State is off

              } else {

                parent[_remove](toggle + ' ' + activeClass);

              }

                // Label hover

              if (label.length && labelHover && toggle == hoverClass) {



                // mouseout|touchend

                label[/ut|nd/.test(type) ? _remove : _add](labelHoverClass);

              }

            }

              if (_mobile) {

              event.stopPropagation();

            } else {

              return false;

            }

          }

        });

      });

    } else {

      return this;

    }

  };



  // Do something with inputs

  function operate(input, direct, method) {

    var node = input[0],

      state = /er/.test(method) ? _indeterminate : /bl/.test(method) ? _disabled : _checked,

      active = method == _update ? {

        checked: node[_checked],

        disabled: node[_disabled],

        indeterminate: input.attr(_indeterminate) == 'true' || input.attr(_determinate) == 'false'

      } : node[state];



    // Check, disable or indeterminate

    if (/^(ch|di|in)/.test(method) && !active) {

      on(input, state);



    // Uncheck, enable or determinate

    } else if (/^(un|en|de)/.test(method) && active) {

      off(input, state);



    // Update

    } else if (method == _update) {



      // Handle states

      for (var state in active) {

        if (active[state]) {

          on(input, state, true);

        } else {

          off(input, state, true);

        }

      }

    } else if (!direct || method == 'toggle') {



      // Helper or label was clicked

      if (!direct) {

        input[_callback]('ifClicked');

      }

        // Toggle checked state

      if (active) {

        if (node[_type] !== _radio) {

          off(input, state);

        }

      } else {

        on(input, state);

      }

    }

  }

    // Add checked, disabled or indeterminate state

  function on(input, state, keep) {

    var node = input[0],

      parent = input.parent(),

      checked = state == _checked,

      indeterminate = state == _indeterminate,

      disabled = state == _disabled,

      callback = indeterminate ? _determinate : checked ? _unchecked : 'enabled',

      regular = option(input, callback + capitalize(node[_type])),

      specific = option(input, state + capitalize(node[_type]));



    // Prevent unnecessary actions

    if (node[state] !== true) {



      // Toggle assigned radio buttons

      if (!keep && state == _checked && node[_type] == _radio && node.name) {

        var form = input.closest('form'),

          inputs = 'input[name="' + node.name + '"]';



        inputs = form.length ? form.find(inputs) : $(inputs);



        inputs.each(function() {

          if (this !== node && $(this).data(_iCheck)) {

            off($(this), state);

          }

        });

      }

        // Indeterminate state

      if (indeterminate) {



        // Add indeterminate state

        node[state] = true;



        // Remove checked state

        if (node[_checked]) {

          off(input, _checked, 'force');

        }

          // Checked or disabled state

      } else {



        // Add checked or disabled state

        if (!keep) {

          node[state] = true;

        }

          // Remove indeterminate state

        if (checked && node[_indeterminate]) {

          off(input, _indeterminate, false);

        }

      }

        // Trigger callbacks

      callbacks(input, checked, state, keep);

    }

      // Add proper cursor

    if (node[_disabled] && !!option(input, _cursor, true)) {

      parent.find('.' + _iCheckHelper).css(_cursor, 'default');

    }

      // Add state class

    parent[_add](specific || option(input, state) || '');



    // Set ARIA attribute

    disabled ? parent.attr('aria-disabled', 'true') : parent.attr('aria-checked', indeterminate ? 'mixed' : 'true');



    // Remove regular state class

    parent[_remove](regular || option(input, callback) || '');

  }

    // Remove checked, disabled or indeterminate state

  function off(input, state, keep) {

    var node = input[0],

      parent = input.parent(),

      checked = state == _checked,

      indeterminate = state == _indeterminate,

      disabled = state == _disabled,

      callback = indeterminate ? _determinate : checked ? _unchecked : 'enabled',

      regular = option(input, callback + capitalize(node[_type])),

      specific = option(input, state + capitalize(node[_type]));



    // Prevent unnecessary actions

    if (node[state] !== false) {



      // Toggle state

      if (indeterminate || !keep || keep == 'force') {

        node[state] = false;

      }

        // Trigger callbacks

      callbacks(input, checked, callback, keep);

    }

      // Add proper cursor

    if (!node[_disabled] && !!option(input, _cursor, true)) {

      parent.find('.' + _iCheckHelper).css(_cursor, 'pointer');

    }

      // Remove state class

    parent[_remove](specific || option(input, state) || '');



    // Set ARIA attribute

    disabled ? parent.attr('aria-disabled', 'false') : parent.attr('aria-checked', 'false');



    // Add regular state class

    parent[_add](regular || option(input, callback) || '');

  }

    // Remove all traces

  function tidy(input, callback) {

    if (input.data(_iCheck)) {



      // Remove everything except input

      input.parent().html(input.attr('style', input.data(_iCheck).s || ''));



      // Callback

      if (callback) {

        input[_callback](callback);

      }

        // Unbind events

      input.off('.i').unwrap();

      $(_label + '[for="' + input[0].id + '"]').add(input.closest(_label)).off('.i');

    }

  }

    // Get some option

  function option(input, state, regular) {

    if (input.data(_iCheck)) {

      return input.data(_iCheck).o[state + (regular ? '' : 'Class')];

    }

  }

    // Capitalize some string

  function capitalize(string) {

    return string.charAt(0).toUpperCase() + string.slice(1);

  }

    // Executable handlers

  function callbacks(input, checked, callback, keep) {

    if (!keep) {

      if (checked) {

        input[_callback]('ifToggled');

      }

        input[_callback]('ifChanged')[_callback]('if' + capitalize(callback));

    }

  }

})(window.jQuery || window.Zepto);