carbon-components/es/components/pagination/pagination.js

The Carbon Design System is IBM’s open-source design system for products and experiences.

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/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import handles from '../../globals/js/mixins/handles';
import eventMatches from '../../globals/js/misc/event-matches';
import on from '../../globals/js/misc/on';

var Pagination = /*#__PURE__*/function (_mixin) {
  _inherits(Pagination, _mixin);

  var _super = _createSuper(Pagination);
  /**
   * Pagination component.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @param {HTMLElement} element The element working as a pagination component.
   * @param {object} [options] The component options.
   * @property {string} [selectorInit] The CSS selector to find pagination components.
   * @property {string} [selectorItemsPerPageInput]
   *   The CSS selector to find the input that determines the number of items per page.
   * @property {string} [selectorPageNumberInput] The CSS selector to find the input that changes the page displayed.
   * @property {string} [selectorPageBackward] The CSS selector to find the button that goes back a page.
   * @property {string} [selectorPageForward] The CSS selector to find the button that goes forward a page.
   * @property {string} [eventItemsPerPage]
   *   The name of the custom event fired when a user changes the number of items per page.
   *   event.detail.value contains the number of items a user wishes to see.
   * @property {string} [eventPageNumber]
   *   The name of the custom event fired when a user inputs a specific page number.
   *   event.detail.value contains the value that the user input.
   * @property {string} [eventPageChange]
   *   The name of the custom event fired when a user goes forward or backward a page.
   *   event.detail.direction contains the direction a user wishes to go.
   */


  /**
   * Pagination component.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @param {HTMLElement} element The element working as a pagination component.
   * @param {object} [options] The component options.
   * @property {string} [selectorInit] The CSS selector to find pagination components.
   * @property {string} [selectorItemsPerPageInput]
   *   The CSS selector to find the input that determines the number of items per page.
   * @property {string} [selectorPageNumberInput] The CSS selector to find the input that changes the page displayed.
   * @property {string} [selectorPageBackward] The CSS selector to find the button that goes back a page.
   * @property {string} [selectorPageForward] The CSS selector to find the button that goes forward a page.
   * @property {string} [eventItemsPerPage]
   *   The name of the custom event fired when a user changes the number of items per page.
   *   event.detail.value contains the number of items a user wishes to see.
   * @property {string} [eventPageNumber]
   *   The name of the custom event fired when a user inputs a specific page number.
   *   event.detail.value contains the value that the user input.
   * @property {string} [eventPageChange]
   *   The name of the custom event fired when a user goes forward or backward a page.
   *   event.detail.direction contains the direction a user wishes to go.
   */
  function Pagination(element, options) {
    var _this;

    _classCallCheck(this, Pagination);

    _this = _super.call(this, element, options);

    _this._emitEvent = function (evtName, detail) {
      var event = new CustomEvent("".concat(evtName), {
        bubbles: true,
        cancelable: true,
        detail: detail
      });

      _this.element.dispatchEvent(event);
    };

    _this.manage(on(_this.element, 'click', function (evt) {
      if (eventMatches(evt, _this.options.selectorPageBackward)) {
        var detail = {
          initialEvt: evt,
          element: evt.target,
          direction: 'backward'
        };

        _this._emitEvent(_this.options.eventPageChange, detail);
      } else if (eventMatches(evt, _this.options.selectorPageForward)) {
        var _detail = {
          initialEvt: evt,
          element: evt.target,
          direction: 'forward'
        };

        _this._emitEvent(_this.options.eventPageChange, _detail);
      }
    }));

    _this.manage(on(_this.element, 'input', function (evt) {
      if (eventMatches(evt, _this.options.selectorItemsPerPageInput)) {
        var detail = {
          initialEvt: evt,
          element: evt.target,
          value: evt.target.value
        };

        _this._emitEvent(_this.options.eventItemsPerPage, detail);
      } else if (eventMatches(evt, _this.options.selectorPageNumberInput)) {
        var _detail2 = {
          initialEvt: evt,
          element: evt.target,
          value: evt.target.value
        };

        _this._emitEvent(_this.options.eventPageNumber, _detail2);
      }
    }));

    return _this;
  }
  /**
   * Dispatches a custom event
   * @param {string} evtName name of the event to be dispatched.
   * @param {object} detail contains the original event and any other necessary details.
   */


  /**
   * Dispatches a custom event
   * @param {string} evtName name of the event to be dispatched.
   * @param {object} detail contains the original event and any other necessary details.
   */
  return _createClass(Pagination);
}(mixin(createComponent, initComponentBySearch, handles));

export default Pagination;