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import { debounce } from 'throttle-debounce'; |
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|
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import { select, subscribe } from '@wordpress/data'; |
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|
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import { getSlug } from '../../utils/get-unique-slug'; |
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|
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/** |
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* Get available TOC block. |
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* |
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* @param {Array | boolean} blocks blocks array. |
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* |
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* @return {Array} toc block data. |
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*/ |
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function getTOC(blocks = false) { |
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let result = false; |
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|
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if (!blocks) { |
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const { getBlocks } = select('core/block-editor'); |
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|
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blocks = getBlocks(); |
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} |
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|
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blocks.forEach((block) => { |
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if (!result) { |
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if (block.name === 'ghostkit/table-of-contents') { |
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result = block; |
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} else if (block.innerBlocks && block.innerBlocks.length) { |
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result = getTOC(block.innerBlocks); |
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} |
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} |
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}); |
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|
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return result; |
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} |
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|
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/** |
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* Get available heading blocks. |
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* |
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* @param {Array} blocks blocks array. |
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* |
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* @return {Array} toc block data. |
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*/ |
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function getHeadings(blocks = false) { |
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let result = []; |
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|
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if (!blocks) { |
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const { getBlocks } = select('core/block-editor'); |
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|
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blocks = getBlocks(); |
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} |
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|
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blocks.forEach((block) => { |
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if (block.name === 'core/heading') { |
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result.push(block); |
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} else if (block.innerBlocks && block.innerBlocks.length) { |
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result = [...result, ...getHeadings(block.innerBlocks)]; |
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} |
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}); |
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|
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return result; |
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} |
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|
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let prevHeadings = ''; |
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|
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/** |
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* Update heading ID. |
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*/ |
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function updateHeadingIDs() { |
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const tocBlock = getTOC(); |
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|
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if (!tocBlock) { |
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return; |
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} |
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|
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const headings = getHeadings(); |
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|
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if (prevHeadings && prevHeadings === JSON.stringify(headings)) { |
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return; |
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} |
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|
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const collisionCollector = {}; |
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|
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headings.forEach((block) => { |
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let { anchor } = block.attributes; |
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|
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const { content } = block.attributes; |
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|
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// create new |
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if (content && !anchor) { |
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anchor = getSlug(content); |
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block.attributes.anchor = anchor; |
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} |
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|
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// check collisions. |
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if (anchor) { |
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if (typeof collisionCollector[anchor] !== 'undefined') { |
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collisionCollector[anchor] += 1; |
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anchor += `-${collisionCollector[anchor]}`; |
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block.attributes.anchor = anchor; |
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} else { |
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collisionCollector[anchor] = 1; |
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} |
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} |
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}); |
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|
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prevHeadings = JSON.stringify(headings); |
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} |
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|
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const updateHeadingIDsDebounce = debounce(300, updateHeadingIDs); |
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|
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/** |
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* Subscribe to all editor changes. |
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* We don't need to run this code in WordPress >= 5.9, as anchors already adds automatically. |
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*/ |
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if ( |
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!wp.blockEditor.__experimentalBlockPatternSetup && |
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!wp.blockEditor.BlockPatternSetup && |
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!wp.blockEditor.blockPatternSetup |
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) { |
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subscribe(() => { |
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updateHeadingIDsDebounce(); |
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}); |
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} |
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|
