discourse/vendor/assets/javascripts/jquery.ui.widget.js

/*! jQuery UI - v1.12.1+0b7246b6eeadfa9e2696e22f3230f6452f8129dc - 2020-02-20
 * http://jqueryui.com
 * Includes: widget.js
 * Copyright jQuery Foundation and other contributors; Licensed MIT */

/* global define, require */
/* eslint-disable no-param-reassign, new-cap, jsdoc/require-jsdoc */

(function (factory) {
  'use strict';
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define(['jquery'], factory);
  } else if (typeof exports === 'object') {
    // Node/CommonJS
    factory(require('jquery'));
  } else {
    // Browser globals
    factory(window.jQuery);
  }
})(function ($) {
  ('use strict');

  $.ui = $.ui || {};

  $.ui.version = '1.12.1';

  /*!
   * jQuery UI Widget 1.12.1
   * http://jqueryui.com
   *
   * Copyright jQuery Foundation and other contributors
   * Released under the MIT license.
   * http://jquery.org/license
   */

  //>>label: Widget
  //>>group: Core
  //>>description: Provides a factory for creating stateful widgets with a common API.
  //>>docs: http://api.jqueryui.com/jQuery.widget/
  //>>demos: http://jqueryui.com/widget/

  // Support: jQuery 1.9.x or older
  // $.expr[ ":" ] is deprecated.
  if (!$.expr.pseudos) {
    $.expr.pseudos = $.expr[':'];
  }

  // Support: jQuery 1.11.x or older
  // $.unique has been renamed to $.uniqueSort
  if (!$.uniqueSort) {
    $.uniqueSort = $.unique;
  }

  var widgetUuid = 0;
  var widgetHasOwnProperty = Array.prototype.hasOwnProperty;
  var widgetSlice = Array.prototype.slice;

  $.cleanData = (function (orig) {
    return function (elems) {
      var events, elem, i;
      // eslint-disable-next-line eqeqeq
      for (i = 0; (elem = elems[i]) != null; i++) {
        // Only trigger remove when necessary to save time
        events = $._data(elem, 'events');
        if (events && events.remove) {
          $(elem).triggerHandler('remove');
        }
      }
      orig(elems);
    };
  })($.cleanData);

  $.widget = function (name, base, prototype) {
    var existingConstructor, constructor, basePrototype;

    // ProxiedPrototype allows the provided prototype to remain unmodified
    // so that it can be used as a mixin for multiple widgets (#8876)
    var proxiedPrototype = {};

    var namespace = name.split('.')[0];
    name = name.split('.')[1];
    var fullName = namespace + '-' + name;

    if (!prototype) {
      prototype = base;
      base = $.Widget;
    }

    if ($.isArray(prototype)) {
      prototype = $.extend.apply(null, [{}].concat(prototype));
    }

    // Create selector for plugin
    $.expr.pseudos[fullName.toLowerCase()] = function (elem) {
      return !!$.data(elem, fullName);
    };

    $[namespace] = $[namespace] || {};
    existingConstructor = $[namespace][name];
    constructor = $[namespace][name] = function (options, element) {
      // Allow instantiation without "new" keyword
      if (!this._createWidget) {
        return new constructor(options, element);
      }

      // Allow instantiation without initializing for simple inheritance
      // must use "new" keyword (the code above always passes args)
      if (arguments.length) {
        this._createWidget(options, element);
      }
    };

    // Extend with the existing constructor to carry over any static properties
    $.extend(constructor, existingConstructor, {
      version: prototype.version,

      // Copy the object used to create the prototype in case we need to
      // redefine the widget later
      _proto: $.extend({}, prototype),

      // Track widgets that inherit from this widget in case this widget is
      // redefined after a widget inherits from it
      _childConstructors: []
    });

    basePrototype = new base();

    // We need to make the options hash a property directly on the new instance
    // otherwise we'll modify the options hash on the prototype that we're
    // inheriting from
    basePrototype.options = $.widget.extend({}, basePrototype.options);
    $.each(prototype, function (prop, value) {
      if (!$.isFunction(value)) {
        proxiedPrototype[prop] = value;
        return;
      }
      proxiedPrototype[prop] = (function () {
        function _super() {
          return base.prototype[prop].apply(this, arguments);
        }

        function _superApply(args) {
          return base.prototype[prop].apply(this, args);
        }

        return function () {
          var __super = this._super;
          var __superApply = this._superApply;
          var returnValue;

          this._super = _super;
          this._superApply = _superApply;

          returnValue = value.apply(this, arguments);

          this._super = __super;
          this._superApply = __superApply;

          return returnValue;
        };
      })();
    });
    constructor.prototype = $.widget.extend(
      basePrototype,
      {
        // TODO: remove support for widgetEventPrefix
        // always use the name + a colon as the prefix, e.g., draggable:start
        // don't prefix for widgets that aren't DOM-based
        widgetEventPrefix: existingConstructor
          ? basePrototype.widgetEventPrefix || name
          : name
      },
      proxiedPrototype,
      {
        constructor: constructor,
        namespace: namespace,
        widgetName: name,
        widgetFullName: fullName
      }
    );

    // If this widget is being redefined then we need to find all widgets that
    // are inheriting from it and redefine all of them so that they inherit from
    // the new version of this widget. We're essentially trying to replace one
    // level in the prototype chain.
    if (existingConstructor) {
      $.each(existingConstructor._childConstructors, function (i, child) {
        var childPrototype = child.prototype;

        // Redefine the child widget using the same prototype that was
        // originally used, but inherit from the new version of the base
        $.widget(
          childPrototype.namespace + '.' + childPrototype.widgetName,
          constructor,
          child._proto
        );
      });

      // Remove the list of existing child constructors from the old constructor
      // so the old child constructors can be garbage collected
      delete existingConstructor._childConstructors;
    } else {
      base._childConstructors.push(constructor);
    }

    $.widget.bridge(name, constructor);

    return constructor;
  };

  $.widget.extend = function (target) {
    var input = widgetSlice.call(arguments, 1);
    var inputIndex = 0;
    var inputLength = input.length;
    var key;
    var value;

    for (; inputIndex < inputLength; inputIndex++) {
      for (key in input[inputIndex]) {
        value = input[inputIndex][key];
        if (
          widgetHasOwnProperty.call(input[inputIndex], key) &&
          value !== undefined
        ) {
          // Clone objects
          if ($.isPlainObject(value)) {
            target[key] = $.isPlainObject(target[key])
              ? $.widget.extend({}, target[key], value)
              : // Don't extend strings, arrays, etc. with objects
                $.widget.extend({}, value);

            // Copy everything else by reference
          } else {
            target[key] = value;
          }
        }
      }
    }
    return target;
  };

  $.widget.bridge = function (name, object) {
    var fullName = object.prototype.widgetFullName || name;
    $.fn[name] = function (options) {
      var isMethodCall = typeof options === 'string';
      var args = widgetSlice.call(arguments, 1);
      var returnValue = this;

      if (isMethodCall) {
        // If this is an empty collection, we need to have the instance method
        // return undefined instead of the jQuery instance
        if (!this.length && options === 'instance') {
          returnValue = undefined;
        } else {
          this.each(function () {
            var methodValue;
            var instance = $.data(this, fullName);

            if (options === 'instance') {
              returnValue = instance;
              return false;
            }

            if (!instance) {
              return $.error(
                'cannot call methods on ' +
                  name +
                  ' prior to initialization; ' +
                  "attempted to call method '" +
                  options +
                  "'"
              );
            }

            if (!$.isFunction(instance[options]) || options.charAt(0) === '_') {
              return $.error(
                "no such method '" +
                  options +
                  "' for " +
                  name +
                  ' widget instance'
              );
            }

            methodValue = instance[options].apply(instance, args);

            if (methodValue !== instance && methodValue !== undefined) {
              returnValue =
                methodValue && methodValue.jquery
                  ? returnValue.pushStack(methodValue.get())
                  : methodValue;
              return false;
            }
          });
        }
      } else {
        // Allow multiple hashes to be passed on init
        if (args.length) {
          options = $.widget.extend.apply(null, [options].concat(args));
        }

        this.each(function () {
          var instance = $.data(this, fullName);
          if (instance) {
            instance.option(options || {});
            if (instance._init) {
              instance._init();
            }
          } else {
            $.data(this, fullName, new object(options, this));
          }
        });
      }

      return returnValue;
    };
  };

  $.Widget = function (/* options, element */) {};
  $.Widget._childConstructors = [];

  $.Widget.prototype = {
    widgetName: 'widget',
    widgetEventPrefix: '',
    defaultElement: '<div>',

    options: {
      classes: {},
      disabled: false,

      // Callbacks
      create: null
    },

    _createWidget: function (options, element) {
      element = $(element || this.defaultElement || this)[0];
      this.element = $(element);
      this.uuid = widgetUuid++;
      this.eventNamespace = '.' + this.widgetName + this.uuid;

      this.bindings = $();
      this.hoverable = $();
      this.focusable = $();
      this.classesElementLookup = {};

      if (element !== this) {
        $.data(element, this.widgetFullName, this);
        this._on(true, this.element, {
          remove: function (event) {
            if (event.target === element) {
              this.destroy();
            }
          }
        });
        this.document = $(
          element.style
            ? // Element within the document
              element.ownerDocument
            : // Element is window or document
              element.document || element
        );
        this.window = $(
          this.document[0].defaultView || this.document[0].parentWindow
        );
      }

      this.options = $.widget.extend(
        {},
        this.options,
        this._getCreateOptions(),
        options
      );

      this._create();

      if (this.options.disabled) {
        this._setOptionDisabled(this.options.disabled);
      }

      this._trigger('create', null, this._getCreateEventData());
      this._init();
    },

    _getCreateOptions: function () {
      return {};
    },

    _getCreateEventData: $.noop,

    _create: $.noop,

    _init: $.noop,

    destroy: function () {
      var that = this;

      this._destroy();
      $.each(this.classesElementLookup, function (key, value) {
        that._removeClass(value, key);
      });

      // We can probably remove the unbind calls in 2.0
      // all event bindings should go through this._on()
      this.element.off(this.eventNamespace).removeData(this.widgetFullName);
      this.widget().off(this.eventNamespace).removeAttr('aria-disabled');

      // Clean up events and states
      this.bindings.off(this.eventNamespace);
    },

    _destroy: $.noop,

    widget: function () {
      return this.element;
    },

    option: function (key, value) {
      var options = key;
      var parts;
      var curOption;
      var i;

      if (arguments.length === 0) {
        // Don't return a reference to the internal hash
        return $.widget.extend({}, this.options);
      }

      if (typeof key === 'string') {
        // Handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
        options = {};
        parts = key.split('.');
        key = parts.shift();
        if (parts.length) {
          curOption = options[key] = $.widget.extend({}, this.options[key]);
          for (i = 0; i < parts.length - 1; i++) {
            curOption[parts[i]] = curOption[parts[i]] || {};
            curOption = curOption[parts[i]];
          }
          key = parts.pop();
          if (arguments.length === 1) {
            return curOption[key] === undefined ? null : curOption[key];
          }
          curOption[key] = value;
        } else {
          if (arguments.length === 1) {
            return this.options[key] === undefined ? null : this.options[key];
          }
          options[key] = value;
        }
      }

      this._setOptions(options);

      return this;
    },

    _setOptions: function (options) {
      var key;

      for (key in options) {
        this._setOption(key, options[key]);
      }

      return this;
    },

    _setOption: function (key, value) {
      if (key === 'classes') {
        this._setOptionClasses(value);
      }

      this.options[key] = value;

      if (key === 'disabled') {
        this._setOptionDisabled(value);
      }

      return this;
    },

    _setOptionClasses: function (value) {
      var classKey, elements, currentElements;

      for (classKey in value) {
        currentElements = this.classesElementLookup[classKey];
        if (
          value[classKey] === this.options.classes[classKey] ||
          !currentElements ||
          !currentElements.length
        ) {
          continue;
        }

        // We are doing this to create a new jQuery object because the _removeClass() call
        // on the next line is going to destroy the reference to the current elements being
        // tracked. We need to save a copy of this collection so that we can add the new classes
        // below.
        elements = $(currentElements.get());
        this._removeClass(currentElements, classKey);

        // We don't use _addClass() here, because that uses this.options.classes
        // for generating the string of classes. We want to use the value passed in from
        // _setOption(), this is the new value of the classes option which was passed to
        // _setOption(). We pass this value directly to _classes().
        elements.addClass(
          this._classes({
            element: elements,
            keys: classKey,
            classes: value,
            add: true
          })
        );
      }
    },

    _setOptionDisabled: function (value) {
      this._toggleClass(
        this.widget(),
        this.widgetFullName + '-disabled',
        null,
        !!value
      );

      // If the widget is becoming disabled, then nothing is interactive
      if (value) {
        this._removeClass(this.hoverable, null, 'ui-state-hover');
        this._removeClass(this.focusable, null, 'ui-state-focus');
      }
    },

    enable: function () {
      return this._setOptions({ disabled: false });
    },

    disable: function () {
      return this._setOptions({ disabled: true });
    },

    _classes: function (options) {
      var full = [];
      var that = this;

      options = $.extend(
        {
          element: this.element,
          classes: this.options.classes || {}
        },
        options
      );

      function bindRemoveEvent() {
        options.element.each(function (_, element) {
          var isTracked = $.map(that.classesElementLookup, function (elements) {
            return elements;
          }).some(function (elements) {
            return elements.is(element);
          });

          if (!isTracked) {
            that._on($(element), {
              remove: '_untrackClassesElement'
            });
          }
        });
      }

      function processClassString(classes, checkOption) {
        var current, i;
        for (i = 0; i < classes.length; i++) {
          current = that.classesElementLookup[classes[i]] || $();
          if (options.add) {
            bindRemoveEvent();
            current = $(
              $.uniqueSort(current.get().concat(options.element.get()))
            );
          } else {
            current = $(current.not(options.element).get());
          }
          that.classesElementLookup[classes[i]] = current;
          full.push(classes[i]);
          if (checkOption && options.classes[classes[i]]) {
            full.push(options.classes[classes[i]]);
          }
        }
      }

      if (options.keys) {
        processClassString(options.keys.match(/\S+/g) || [], true);
      }
      if (options.extra) {
        processClassString(options.extra.match(/\S+/g) || []);
      }

      return full.join(' ');
    },

    _untrackClassesElement: function (event) {
      var that = this;
      $.each(that.classesElementLookup, function (key, value) {
        if ($.inArray(event.target, value) !== -1) {
          that.classesElementLookup[key] = $(value.not(event.target).get());
        }
      });

      this._off($(event.target));
    },

    _removeClass: function (element, keys, extra) {
      return this._toggleClass(element, keys, extra, false);
    },

    _addClass: function (element, keys, extra) {
      return this._toggleClass(element, keys, extra, true);
    },

    _toggleClass: function (element, keys, extra, add) {
      add = typeof add === 'boolean' ? add : extra;
      var shift = typeof element === 'string' || element === null,
        options = {
          extra: shift ? keys : extra,
          keys: shift ? element : keys,
          element: shift ? this.element : element,
          add: add
        };
      options.element.toggleClass(this._classes(options), add);
      return this;
    },

    _on: function (suppressDisabledCheck, element, handlers) {
      var delegateElement;
      var instance = this;

      // No suppressDisabledCheck flag, shuffle arguments
      if (typeof suppressDisabledCheck !== 'boolean') {
        handlers = element;
        element = suppressDisabledCheck;
        suppressDisabledCheck = false;
      }

      // No element argument, shuffle and use this.element
      if (!handlers) {
        handlers = element;
        element = this.element;
        delegateElement = this.widget();
      } else {
        element = delegateElement = $(element);
        this.bindings = this.bindings.add(element);
      }

      $.each(handlers, function (event, handler) {
        function handlerProxy() {
          // Allow widgets to customize the disabled handling
          // - disabled as an array instead of boolean
          // - disabled class as method for disabling individual parts
          if (
            !suppressDisabledCheck &&
            (instance.options.disabled === true ||
              $(this).hasClass('ui-state-disabled'))
          ) {
            return;
          }
          return (typeof handler === 'string'
            ? instance[handler]
            : handler
          ).apply(instance, arguments);
        }

        // Copy the guid so direct unbinding works
        if (typeof handler !== 'string') {
          handlerProxy.guid = handler.guid =
            handler.guid || handlerProxy.guid || $.guid++;
        }

        var match = event.match(/^([\w:-]*)\s*(.*)$/);
        var eventName = match[1] + instance.eventNamespace;
        var selector = match[2];

        if (selector) {
          delegateElement.on(eventName, selector, handlerProxy);
        } else {
          element.on(eventName, handlerProxy);
        }
      });
    },

    _off: function (element, eventName) {
      eventName =
        (eventName || '').split(' ').join(this.eventNamespace + ' ') +
        this.eventNamespace;
      element.off(eventName);

      // Clear the stack to avoid memory leaks (#10056)
      this.bindings = $(this.bindings.not(element).get());
      this.focusable = $(this.focusable.not(element).get());
      this.hoverable = $(this.hoverable.not(element).get());
    },

    _delay: function (handler, delay) {
      var instance = this;
      function handlerProxy() {
        return (typeof handler === 'string'
          ? instance[handler]
          : handler
        ).apply(instance, arguments);
      }
      return setTimeout(handlerProxy, delay || 0);
    },

    _hoverable: function (element) {
      this.hoverable = this.hoverable.add(element);
      this._on(element, {
        mouseenter: function (event) {
          this._addClass($(event.currentTarget), null, 'ui-state-hover');
        },
        mouseleave: function (event) {
          this._removeClass($(event.currentTarget), null, 'ui-state-hover');
        }
      });
    },

    _focusable: function (element) {
      this.focusable = this.focusable.add(element);
      this._on(element, {
        focusin: function (event) {
          this._addClass($(event.currentTarget), null, 'ui-state-focus');
        },
        focusout: function (event) {
          this._removeClass($(event.currentTarget), null, 'ui-state-focus');
        }
      });
    },

    _trigger: function (type, event, data) {
      var prop, orig;
      var callback = this.options[type];

      data = data || {};
      event = $.Event(event);
      event.type = (type === this.widgetEventPrefix
        ? type
        : this.widgetEventPrefix + type
      ).toLowerCase();

      // The original event may come from any element
      // so we need to reset the target on the new event
      event.target = this.element[0];

      // Copy original event properties over to the new event
      orig = event.originalEvent;
      if (orig) {
        for (prop in orig) {
          if (!(prop in event)) {
            event[prop] = orig[prop];
          }
        }
      }

      this.element.trigger(event, data);
      return !(
        ($.isFunction(callback) &&
          callback.apply(this.element[0], [event].concat(data)) === false) ||
        event.isDefaultPrevented()
      );
    }
  };

  $.each({ show: 'fadeIn', hide: 'fadeOut' }, function (method, defaultEffect) {
    $.Widget.prototype['_' + method] = function (element, options, callback) {
      if (typeof options === 'string') {
        options = { effect: options };
      }

      var hasOptions;
      var effectName = !options
        ? method
        : options === true || typeof options === 'number'
        ? defaultEffect
        : options.effect || defaultEffect;

      options = options || {};
      if (typeof options === 'number') {
        options = { duration: options };
      }

      hasOptions = !$.isEmptyObject(options);
      options.complete = callback;

      if (options.delay) {
        element.delay(options.delay);
      }

      if (hasOptions && $.effects && $.effects.effect[effectName]) {
        element[method](options);
      } else if (effectName !== method && element[effectName]) {
        element[effectName](options.duration, options.easing, callback);
      } else {
        element.queue(function (next) {
          $(this)[method]();
          if (callback) {
            callback.call(element[0]);
          }
          next();
        });
      }
    };
  });
});