Reference Source

coral-spectrum/coral-component-table/src/scripts/TableColumn.js

/**
 * Copyright 2019 Adobe. All rights reserved.
 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

import {BaseComponent} from '../../../coral-base-component';
import {alignment} from './TableUtil';
import {commons, transform, validate} from '../../../coral-utils';

const CLASSNAME = '_coral-Table-column';

/**
 Enumeration for {@link TableColumn} sortable direction options.

 @typedef {Object} TableColumnSortableDirectionEnum

 @property {String} DEFAULT
 Default. No sorting applied.
 @property {String} ASCENDING
 Ascending sort.
 @property {String} DESCENDING
 Descending sort.
 */
const sortableDirection = {
  DEFAULT: 'default',
  ASCENDING: 'ascending',
  DESCENDING: 'descending'
};

/**
 Enumeration for {@link TableColumn} sortable type options.

 @typedef {Object} TableColumnSortableTypeEnum

 @property {String} ALPHANUMERIC
 Alphanumeric type. If sorting is based on {@link TableCell#value}, use {String}.
 @property {String} NUMBER
 Number type. If sorting is based on {@link TableCell#value}, use {Number}.
 @property {String} DATE
 Date type. If sorting is based on {@link TableCell#value}, use {Date} in milliseconds.
 @property {String} CUSTOM
 Custom type. Sorting is based on user defined sorting.
 */
const sortableType = {
  ALPHANUMERIC: 'alphanumeric',
  NUMBER: 'number',
  DATE: 'date',
  CUSTOM: 'custom'
};

/**
 @class Coral.Table.Column
 @classdesc A Table column component
 @htmltag coral-table-column
 @htmlbasetag col
 @extends {HTMLTableColElement}
 @extends {BaseComponent}
 */
class TableColumn extends BaseComponent(HTMLTableColElement) {
  /**
   The column cells alignment. The alignment should take the {@link i18n} configuration into account.

   @type {String}
   @default TableColumnAlignmentEnum.LEFT
   @htmlattribute alignment
   @htmlattributereflected
   */
  get alignment() {
    return this._alignment || alignment.LEFT;
  }

  set alignment(value) {
    const oldValue = this._alignment;

    value = transform.string(value).toLowerCase();
    this._alignment = validate.enumeration(alignment)(value) && value || alignment.LEFT;
    this._reflectAttribute('alignment', this._alignment);

    // Don't trigger on initialization if alignment is LEFT to improve performance
    if (!(typeof oldValue === 'undefined' && this._alignment === alignment.LEFT)) {
      window.requestAnimationFrame(() => {
        this.trigger('coral-table-column:_alignmentchanged');
      });
    }
  }

  /**
   Whether the column has a fixed width.

   @type {Boolean}
   @default false
   @htmlattribute fixedwidth
   @htmlattributereflected
   */
  get fixedWidth() {
    return this._fixedWidth || false;
  }

  set fixedWidth(value) {
    this._fixedWidth = transform.booleanAttr(value);
    this._reflectAttribute('fixedwidth', this._fixedWidth);

    window.requestAnimationFrame(() => {
      this.trigger('coral-table-column:_fixedwidthchanged');
    });
  }

  /**
   Whether the column is hidden.

   @type {Boolean}
   @default false
   @htmlattribute hidden
   @htmlattributereflected
   */
  get hidden() {
    return this._hidden || false;
  }

  set hidden(value) {
    this._hidden = transform.booleanAttr(value);
    this._reflectAttribute('hidden', this._hidden);

    window.requestAnimationFrame(() => {
      this.trigger('coral-table-column:_hiddenchanged');
    });
  }

  /**
   Whether the table column is orderable.
   Note that this does not affect the underlying data, only presentation.

   @type {Boolean}
   @default false
   @htmlattribute orderable
   @htmlattributereflected
   */
  get orderable() {
    return this._orderable || false;
  }

  set orderable(value) {
    this._orderable = transform.booleanAttr(value);
    this._reflectAttribute('orderable', this._orderable);

    window.requestAnimationFrame(() => {
      this.trigger('coral-table-column:_orderablechanged');
    });
  }

  /**
   Whether the column is sortable by user interaction.

   @type {Boolean}
   @default false
   @htmlattribute sortable
   @htmlattributereflected
   */
  get sortable() {
    return this._sortable || false;
  }

  set sortable(value) {
    this._sortable = transform.booleanAttr(value);
    this._reflectAttribute('sortable', this._sortable);

    window.requestAnimationFrame(() => {
      this.trigger('coral-table-column:_sortablechanged');
    });
  }

  /**
   The sorting type. See {@link TableColumnSortableTypeEnum}. If setting to <code>custom</code>, columns won't sort
   based on the default table sorting.
   Instead, a custom sorting can be performed when triggered by user interaction. This can be defined by listening to
   the {@link coral-table:beforecolumnsort} event.

   @type {String}
   @default TableColumnSortableTypeEnum.ALPHANUMERIC
   @htmlattribute sortabletype
   @htmlattributereflected
   */
  get sortableType() {
    return this._sortableType || sortableType.ALPHANUMERIC;
  }

  set sortableType(value) {
    value = transform.string(value).toLowerCase();
    this._sortableType = validate.enumeration(sortableType)(value) && value || sortableType.ALPHANUMERIC;
    this._reflectAttribute('sortabletype', this._sortableType);
  }

  /**
   The sorting direction. Sorts the column cells based on {@link TableCell#value}.
   If not present, the sort is based on the cell text content. See {@link TableColumnSortableDirectionEnum}.

   @type {String}
   @default TableColumnSortableDirectionEnum.DEFAULT
   @htmlattribute sortabledirection
   @htmlattributereflected
   */
  get sortableDirection() {
    return this._sortableDirection || sortableDirection.DEFAULT;
  }

  set sortableDirection(value) {
    value = transform.string(value).toLowerCase();
    this._sortableDirection = validate.enumeration(sortableDirection)(value) && value || sortableDirection.DEFAULT;
    this._reflectAttribute('sortabledirection', this._sortableDirection);

    // Prevent sorting if unnecessary
    if (!this._preventSort) {
      this._doSort();

      window.requestAnimationFrame(() => {
        this.trigger('coral-table-column:_sortabledirectionchanged');
      });
    }
  }

  /** @private */
  _sort() {
    let newSortableDirection;
    if (this.sortableDirection === sortableDirection.DEFAULT) {
      newSortableDirection = sortableDirection.ASCENDING;
    } else if (this.sortableDirection === sortableDirection.ASCENDING) {
      newSortableDirection = sortableDirection.DESCENDING;
    } else if (this.sortableDirection === sortableDirection.DESCENDING) {
      newSortableDirection = sortableDirection.DEFAULT;
    }

    this.trigger('coral-table-column:_beforecolumnsort', {newSortableDirection});
  }

  /** @private */
  _doSort(onInitialization) {
    this.trigger('coral-table-column:_sort', {onInitialization, sortableDirection, sortableType});
  }

  /**
   Returns {@link TableColumn} sortable direction options.

   @return {TableColumnSortableDirectionEnum}
   */
  static get sortableDirection() {
    return sortableDirection;
  }

  /**
   Returns {@link TableColumn} sortable type options.

   @return {TableColumnSortableTypeEnum}
   */
  static get sortableType() {
    return sortableType;
  }

  /**
   Returns {@link TableColumn} alignment options.

   @return {TableColumnAlignmentEnum}
   */
  static get alignment() {
    return alignment;
  }

  static get _attributePropertyMap() {
    return commons.extend(super._attributePropertyMap, {
      fixedwidth: 'fixedWidth',
      sortabletype: 'sortableType',
      sortabledirection: 'sortableDirection'
    });
  }

  /** @ignore */
  static get observedAttributes() {
    return super.observedAttributes.concat([
      'fixedwidth',
      'hidden',
      'alignment',
      'orderable',
      'sortable',
      'sortabletype',
      'sortabledirection',
    ]);
  }

  /** @ignore */
  render() {
    super.render();

    this.classList.add(CLASSNAME);

    // Default reflected attributes
    if (!this._sortableType) {
      this.sortableType = sortableType.ALPHANUMERIC;
    }
    if (!this._sortableDirection) {
      this.sortableDirection = sortableDirection.DEFAULT;
    }
    if (!this._alignment) {
      this.alignment = alignment.LEFT;
    }
  }

  /**
   Triggered when {@link TableColumn#alignment} changed.

   @typedef {CustomEvent} coral-table-column:_alignmentchanged

   @private
   */

  /**
   Triggered when {@link TableColumn#fixedWidth} changed.

   @typedef {CustomEvent} coral-table-column:_fixedwidthchanged

   @private
   */

  /**
   Triggered when {@link TableColumn#orderable} changed.

   @typedef {CustomEvent} coral-table-column:_orderablechanged

   @private
   */

  /**
   Triggered when {@link TableColumn#sortable} changed.

   @typedef {CustomEvent} coral-table-column:_sortablechanged

   @private
   */

  /**
   Triggered when {@link TableColumn#sortableDirection} changed.

   @typedef {CustomEvent} coral-table-column:_sortabledirectionchanged

   @private
   */

  /**
   Triggered when {@link TableColumn#hidden} changed.

   @typedef {CustomEvent} coral-table-column:_hiddenchanged

   @private
   */

  /**
   Triggered before {@link TableColumn#sortableDirection} changed.

   @typedef {CustomEvent} coral-table-column:_beforecolumnsort

   @private
   */

  /**
   Triggered when {@link TableColumn#sortableDirection} changed.

   @typedef {CustomEvent} coral-table-column:_sort

   @private
   */
}

export default TableColumn;