@wordpress/block-editor/build/hooks/custom-class-name.native.js

Generic block editor.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.addAttribute = addAttribute;
exports.addSaveProps = addSaveProps;
exports.getHTMLRootElementClasses = getHTMLRootElementClasses;
exports.addParsedDifference = addParsedDifference;

var _lodash = require("lodash");

var _classnames = _interopRequireDefault(require("classnames"));

var _hooks = require("@wordpress/hooks");

var _blocks = require("@wordpress/blocks");

/**
 * External dependencies
 */

/**
 * WordPress dependencies
 */

/**
 * Filters registered block settings, extending attributes with anchor using ID
 * of the first node.
 *
 * @param {Object} settings Original block settings.
 *
 * @return {Object} Filtered block settings.
 */
function addAttribute(settings) {
  if ((0, _blocks.hasBlockSupport)(settings, 'customClassName', true)) {
    // Gracefully handle if settings.attributes is undefined.
    settings.attributes = { ...settings.attributes,
      className: {
        type: 'string'
      }
    };
  }

  return settings;
}
/**
 * Override props assigned to save component to inject anchor ID, if block
 * supports anchor. This is only applied if the block's save result is an
 * element and not a markup string.
 *
 * @param {Object} extraProps Additional props applied to save element.
 * @param {Object} blockType  Block type.
 * @param {Object} attributes Current block attributes.
 *
 * @return {Object} Filtered props applied to save element.
 */


function addSaveProps(extraProps, blockType, attributes) {
  if ((0, _blocks.hasBlockSupport)(blockType, 'customClassName', true) && attributes.className) {
    extraProps.className = (0, _classnames.default)(extraProps.className, attributes.className);
  }

  return extraProps;
}
/**
 * Given an HTML string, returns an array of class names assigned to the root
 * element in the markup.
 *
 * @param {string} innerHTML Markup string from which to extract classes.
 *
 * @return {string[]} Array of class names assigned to the root element.
 */


function getHTMLRootElementClasses(innerHTML) {
  innerHTML = `<div data-custom-class-name>${innerHTML}</div>`;
  const parsed = (0, _blocks.parseWithAttributeSchema)(innerHTML, {
    type: 'string',
    source: 'attribute',
    selector: '[data-custom-class-name] > *',
    attribute: 'class'
  });
  return parsed ? parsed.trim().split(/\s+/) : [];
}
/**
 * Given a parsed set of block attributes, if the block supports custom class
 * names and an unknown class (per the block's serialization behavior) is
 * found, the unknown classes are treated as custom classes. This prevents the
 * block from being considered as invalid.
 *
 * @param {Object} blockAttributes Original block attributes.
 * @param {Object} blockType       Block type settings.
 * @param {string} innerHTML       Original block markup.
 *
 * @return {Object} Filtered block attributes.
 */


function addParsedDifference(blockAttributes, blockType, innerHTML) {
  if ((0, _blocks.hasBlockSupport)(blockType, 'customClassName', true)) {
    // To determine difference, serialize block given the known set of
    // attributes. If there are classes which are mismatched with the
    // incoming HTML of the block, add to filtered result.
    const serialized = (0, _blocks.getSaveContent)(blockType, blockAttributes);
    const classes = getHTMLRootElementClasses(serialized);
    const parsedClasses = getHTMLRootElementClasses(innerHTML);
    const customClasses = (0, _lodash.difference)(parsedClasses, classes);
    const filteredClassName = (0, _lodash.compact)([blockAttributes.className, ...customClasses]).join(' ');

    if (filteredClassName) {
      blockAttributes.className = filteredClassName;
    } else {
      delete blockAttributes.className;
    }
  }

  return blockAttributes;
}

(0, _hooks.addFilter)('blocks.registerBlockType', 'core/custom-class-name/attribute', addAttribute);
(0, _hooks.addFilter)('blocks.getSaveContent.extraProps', 'core/custom-class-name/save-props', addSaveProps);
(0, _hooks.addFilter)('blocks.getBlockAttributes', 'core/custom-class-name/addParsedDifference', addParsedDifference);
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