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window.MWP = window.MWP || {}; window.MWP.SFE = window.MWP.SFE || {}; const SFE = window.MWP.SFE; SFE.ManagerData = SFE.ManagerData || {}; const { createBlock, serialize: serializeBlocks } = window.wp?.blocks || {}; const UUID_ATTR_KEYS = ['mwpSfeUuid', 'mwpSfeUuidShadow']; const LIST_ITEM_TEXT_ATTR = 'data-mwp-sfe-list-item-text'; const LIST_ITEM_TEXT_CLASS = 'mwp-sfe-list-item-text'; const PLACEHOLDER_ATTR = 'data-rich-text-placeholder'; const LIST_ID_ATTR = 'data-list-id'; const LIST_ITEM_ID_ATTR = 'data-item-id'; const LIST_RUNTIME_UUID_ATTR = 'data-mwp-sfe-list-runtime-uuid'; const LIST_ITEM_RUNTIME_UUID_ATTR = 'data-mwp-sfe-list-item-runtime-uuid'; /** * Return whether one node is a nested list element. * * @param {Node|null} node Candidate DOM node. * @returns {boolean} True when the node is a nested list. */ function isNestedListNode(node) { return !!( node && node.nodeType === Node.ELEMENT_NODE && (node.tagName === 'UL' || node.tagName === 'OL') ); } /** * Return whether one node is ignorable formatting whitespace between list * structures. * * Pretty-printed block markup often leaves direct `\n` text nodes between a * list item's own text and its nested child list. Those nodes should not be * moved into the direct text surface because they become visible editing * artifacts once wrapped. * * @param {Node|null} node Candidate DOM node. * @returns {boolean} True when the node is ignorable whitespace. */ function isIgnorableListWhitespaceNode(node) { return !!( node && node.nodeType === Node.TEXT_NODE && String(node.textContent || '') .replace(/\uFEFF/g, '') .replace(/\u00A0/g, ' ') .trim() .length === 0 ); } /** * Return the direct inline text surface for one list item. * * @param {HTMLLIElement|null} liElement Candidate list item. * @returns {HTMLElement|null} Existing direct text surface, if any. */ function getDirectItemTextSurface(liElement) { if (!liElement || liElement.nodeType !== Node.ELEMENT_NODE || liElement.tagName !== 'LI') { return null; } return Array.from(liElement.children || []).find(child => ( child && child.nodeType === Node.ELEMENT_NODE && child.getAttribute(LIST_ITEM_TEXT_ATTR) === '1' )) || null; } /** * Return the DOM attribute name that stores one session-scoped runtime UUID. * * Runtime UUIDs are distinct from the existing serialization/attr UUIDs. They * exist only while the editor session is open so external callers can point at * the current live list cursor/target without having to manage shifting paths. * * @param {string} type Supported runtime identity type. * @returns {string} Attribute name, or an empty string for invalid types. */ function getRuntimeUuidAttributeName(type) { if (type === 'list') { return LIST_RUNTIME_UUID_ATTR; } if (type === 'item') { return LIST_ITEM_RUNTIME_UUID_ATTR; } return ''; } /** * Normalize one runtime UUID candidate. * * @param {*} value Candidate runtime UUID. * @returns {string} Trimmed runtime UUID, or an empty string. */ function normalizeRuntimeUuid(value) { return String(value || '').trim(); } /** * Return whether one element matches the requested runtime-identity type. * * @param {Element|null} element Candidate DOM element. * @param {string} type Supported runtime identity type. * @returns {boolean} True when the element matches the type. */ function isRuntimeIdentityElement(element, type) { if (!element || element.nodeType !== Node.ELEMENT_NODE) { return false; } if (type === 'list') { return element.tagName === 'UL' || element.tagName === 'OL'; } if (type === 'item') { return element.tagName === 'LI'; } return false; } /** * Return one tracked element by runtime UUID from the live DOM. * * This intentionally queries the current DOM first instead of trusting only a * cached map so history restores and other structural replacements can keep * runtime UUID resolution stable as long as the attributes remain present. * * @param {Object|null} tracker Active list tracker. * @param {string} runtimeUuid Session-scoped runtime UUID. * @param {string} type Supported runtime identity type. * @returns {Element|null} Matching live DOM element. */ function findElementByRuntimeUuid(tracker, runtimeUuid, type) { const normalizedRuntimeUuid = normalizeRuntimeUuid(runtimeUuid); const attrName = getRuntimeUuidAttributeName(type); if ( !tracker?.listElement || !normalizedRuntimeUuid || !attrName || !isRuntimeIdentityElement(tracker.listElement, 'list') ) { return null; } if ( type === 'list' && tracker.listElement.getAttribute(attrName) === normalizedRuntimeUuid ) { return tracker.listElement; } try { const selector = `[${attrName}="${CSS.escape(normalizedRuntimeUuid)}"]`; return tracker.listElement.querySelector(selector); } catch (error) { const escapedUuid = normalizedRuntimeUuid.replace(/"/g, '\\"'); return tracker.listElement.querySelector(`[${attrName}="${escapedUuid}"]`); } } /** * Return every direct text surface currently attached to one list item. * * Merge/delete flows can temporarily move multiple direct text surfaces into * the same list item. The shared list normalizer must collapse them back to * one canonical surface before placeholder syncing or serialization. * * @param {HTMLLIElement|null} liElement Candidate list item. * @returns {HTMLElement[]} Direct text surfaces in DOM order. */ function getAllDirectItemTextSurfaces(liElement) { if (!liElement || liElement.nodeType !== Node.ELEMENT_NODE || liElement.tagName !== 'LI') { return []; } return Array.from(liElement.children || []).filter(child => ( child && child.nodeType === Node.ELEMENT_NODE && child.getAttribute(LIST_ITEM_TEXT_ATTR) === '1' )); } /** * Return whether one node is only placeholder/caret scaffolding. * * Duplicate direct text surfaces may carry empty placeholder anchors or * caret `
` nodes. Those artifacts should be dropped when collapsing * duplicate surfaces instead of being concatenated into visible stacks. * * @param {Node|null} node Candidate DOM node. * @returns {boolean} True when the node is redundant placeholder UI. */ function isRedundantSurfaceArtifact(node) { if (!node) { return true; } if (isIgnorableListWhitespaceNode(node)) { return true; } if (node.nodeType === Node.TEXT_NODE) { return String(node.textContent || '') .replace(/\uFEFF/g, '') .replace(/\u00A0/g, ' ') .trim() .length === 0; } if (node.nodeType !== Node.ELEMENT_NODE) { return false; } if (node.tagName === 'BR') { return true; } return !!node.hasAttribute?.(PLACEHOLDER_ATTR); } /** * Ensure one list item owns one direct inline text surface. * * The root list remains the single live editor host, but this wrapper gives * schema/ABE flows one stable DOM surface per list item's own text content. * * @param {HTMLLIElement|null} liElement Candidate list item. * @returns {HTMLElement|null} Ensured direct text surface. */ function ensureDirectItemTextSurface(liElement) { if (!liElement || liElement.nodeType !== Node.ELEMENT_NODE || liElement.tagName !== 'LI') { return null; } let surface = getDirectItemTextSurface(liElement); if (!surface) { surface = document.createElement('span'); surface.setAttribute(LIST_ITEM_TEXT_ATTR, '1'); surface.classList.add(LIST_ITEM_TEXT_CLASS); liElement.insertBefore( surface, Array.from(liElement.childNodes || []).find(isNestedListNode) || null ); } getAllDirectItemTextSurfaces(liElement) .filter(candidate => candidate && candidate !== surface) .forEach(duplicateSurface => { Array.from(duplicateSurface.childNodes || []).forEach(node => { if (isRedundantSurfaceArtifact(node)) { node.remove(); return; } surface.appendChild(node); }); duplicateSurface.remove(); }); const childNodes = Array.from(liElement.childNodes || []); childNodes.forEach(node => { if ( node && node !== surface && !isNestedListNode(node) && isIgnorableListWhitespaceNode(node) ) { node.remove(); } }); const movableNodes = childNodes.filter(node => { if (!node || node === surface || isNestedListNode(node)) { return false; } if (isIgnorableListWhitespaceNode(node)) { return false; } return !( node.nodeType === Node.ELEMENT_NODE && node.getAttribute?.(LIST_ITEM_TEXT_ATTR) === '1' ); }); movableNodes.forEach(node => surface.appendChild(node)); return surface; } /** * Clone list attrs while optionally stripping plugin UUID ownership. * * The outermost core/list is the only persisted UUID owner for an entire * list tree. Nested core/list blocks are structural children of that root. * If we preserve a nested list UUID here, one accidental assignment can be * re-serialized forever and split a single logical list into multiple * history/edit targets. Keep this guard unless the ownership model changes * everywhere else in PHP and JS at the same time. * * @param {Object} attrs Parsed Gutenberg attrs. * @param {boolean} allowUuidOwnership True for the root list only. * @returns {Object} Safe cloned attrs. */ function cloneListAttrs(attrs, allowUuidOwnership = true) { const clonedAttrs = JSON.parse(JSON.stringify(attrs || {})); if (allowUuidOwnership) { return clonedAttrs; } UUID_ATTR_KEYS.forEach(key => delete clonedAttrs[key]); return clonedAttrs; } /** * Return the direct list-item children for one list element. * * @param {HTMLElement|null} listElement Candidate list element. * @returns {HTMLLIElement[]} Direct child list items. */ function getDirectListItems(listElement) { if (!listElement || listElement.nodeType !== Node.ELEMENT_NODE) { return []; } return Array.from(listElement.children || []).filter(child => child.tagName === 'LI'); } /** * Normalize one path-like value into zero-based list indexes. * * Supported inputs: * - `0_1_2` * - `1.2.3` * - arrays of integers * * @param {string|Array|null} pathValue Candidate path value. * @returns {number[]|null} Parsed zero-based indexes. */ function normalizePathIndexes(pathValue) { if (Array.isArray(pathValue)) { const indexes = pathValue.map(value => Number.parseInt(value, 10)); return indexes.every(Number.isInteger) && indexes.every(index => index >= 0) ? indexes : null; } const raw = typeof pathValue === 'string' ? pathValue.trim() : ''; if (!raw) { return []; } const separator = raw.includes('.') ? '.' : '_'; const parts = raw.split(separator).filter(Boolean); if (!parts.length) { return []; } const indexes = parts.map(part => Number.parseInt(part, 10)); if (!indexes.every(Number.isInteger)) { return null; } if (separator === '.') { return indexes.every(index => index > 0) ? indexes.map(index => index - 1) : null; } return indexes.every(index => index >= 0) ? indexes : null; } /** * Convert one zero-based path index list into public path metadata. * * @param {number[]} indexes Zero-based indexes. * @returns {{path: string, pathLabel: string, depth: number}} Path metadata. */ function buildPathMeta(indexes) { const safeIndexes = Array.isArray(indexes) ? indexes.filter(Number.isInteger) : []; return { path: safeIndexes.join('_'), pathLabel: safeIndexes.map(index => index + 1).join('.'), depth: Math.max(0, safeIndexes.length - 1), }; } /** * Return the direct child list element for one list item. * * @param {HTMLLIElement|null} listItem Candidate list item. * @returns {HTMLElement|null} Direct nested list, if present. */ function getDirectChildList(listItem) { if (!listItem || listItem.nodeType !== Node.ELEMENT_NODE || listItem.tagName !== 'LI') { return null; } return Array.from(listItem.children || []).find(child => ( child.tagName === 'UL' || child.tagName === 'OL' )) || null; } /** * Return the preferred nested list tag for one list item. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Parent list item. * @returns {string} `UL` or `OL`. */ function getPreferredChildListTagName(tracker, listItem) { const directChildList = getDirectChildList(listItem); if (directChildList) { return directChildList.tagName; } const parentList = listItem?.parentElement; if (parentList && (parentList.tagName === 'UL' || parentList.tagName === 'OL')) { return parentList.tagName; } return tracker?.listElement?.tagName === 'OL' ? 'OL' : 'UL'; } /** * Return one direct child list for a list item, creating it only when needed. * * Outdent can promote one item and then re-home its trailing siblings beneath * that promoted item. When the promoted item already owns a child list, those * siblings must be appended into the existing list so the DOM mirrors native * editor behavior instead of creating duplicate sibling list wrappers. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Parent list item. * @param {string} preferredTagName Fallback list tag name. * @returns {HTMLElement|null} Direct child list element. */ function ensureDirectChildList(tracker, listItem, preferredTagName = '') { if (!listItem || listItem.nodeType !== Node.ELEMENT_NODE || listItem.tagName !== 'LI') { return null; } let childList = getDirectChildList(listItem); if (childList) { return childList; } childList = document.createElement( preferredTagName || getPreferredChildListTagName(tracker, listItem) ); childList.classList.add('wp-block-list'); listItem.appendChild(childList); return childList; } /** * Remove empty nested list wrappers up the ancestry chain. * * The root list element is never removed, even when it becomes empty. * * @param {Object|null} tracker Active list tracker. * @param {HTMLElement|null} startList First candidate nested list. * @returns {void} */ function cleanupEmptyAncestorLists(tracker, startList) { let currentList = startList; while ( currentList && currentList !== tracker?.listElement && currentList.nodeType === Node.ELEMENT_NODE && (currentList.tagName === 'UL' || currentList.tagName === 'OL') && !getDirectListItems(currentList).length ) { const parentItem = currentList.parentElement?.tagName === 'LI' ? currentList.parentElement : null; currentList.remove(); currentList = parentItem ? parentItem.parentElement : null; } } /** * Build one new list item element from a structural operation payload. * * @param {Object|null} operation Candidate operation payload. * @returns {HTMLLIElement} New list item element. */ function buildListItemFromOperation(operation) { const li = document.createElement('li'); const directSurface = ensureDirectItemTextSurface(li); const runtimeUuid = normalizeRuntimeUuid( operation?.itemUuid ?? operation?.newItemUuid ); const html = typeof operation?.contentHtml === 'string' ? operation.contentHtml : (typeof operation?.html === 'string' ? operation.html : ''); const text = typeof operation?.contentText === 'string' ? operation.contentText : (typeof operation?.text === 'string' ? operation.text : ''); if (html) { directSurface.innerHTML = html; } else if (text) { directSurface.textContent = text; } if (runtimeUuid) { li.setAttribute(LIST_ITEM_RUNTIME_UUID_ATTR, runtimeUuid); } return li; } /** * Copy one donor item's structural/style attributes onto the destination list * item while preserving the destination runtime UUID. * * Native Enter list splitting happens inside the browser's contenteditable * engine, so the new sibling inherits the source `li` element's attributes * such as class and style automatically. API-driven insert/move operations * should mirror that behavior by cloning the donor item's `li` attributes, * except for the session-scoped runtime UUID which must stay unique. * * @param {HTMLLIElement|null} listItem Destination list item. * @param {HTMLLIElement|null} donorItem Style/structure donor item. * @returns {void} */ function copyDonorItemAttributes(listItem, donorItem) { if ( !listItem || listItem.nodeType !== Node.ELEMENT_NODE || listItem.tagName !== 'LI' || !donorItem || donorItem.nodeType !== Node.ELEMENT_NODE || donorItem.tagName !== 'LI' ) { return; } const destinationRuntimeUuid = normalizeRuntimeUuid( listItem.getAttribute(LIST_ITEM_RUNTIME_UUID_ATTR) ); Array.from(listItem.attributes || []).forEach(attr => { if (attr?.name === LIST_ITEM_RUNTIME_UUID_ATTR) { return; } listItem.removeAttribute(attr.name); }); Array.from(donorItem.attributes || []).forEach(attr => { if (attr?.name === LIST_ITEM_RUNTIME_UUID_ATTR) { return; } listItem.setAttribute(attr.name, attr.value); }); if (destinationRuntimeUuid) { listItem.setAttribute(LIST_ITEM_RUNTIME_UUID_ATTR, destinationRuntimeUuid); } } /** * Reassign one list item's structural ID from its destination styling * context. * * When an explicit target item is known, its structural `data-item-id` * becomes the style donor for insert-before, insert-after, move-before, and * move-after commands. This keeps the inheritance rule simple and matches the * public API's explicit `targetItemUuid` model. * * For internal list-path insert/move cases that do not resolve through one * target item, fall back to the local destination neighbors. If there is no * neighboring item at all, clear the structural ID so the next tracker rebuild * seeds a fresh item identity instead of accidentally preserving source attrs. * * @param {HTMLLIElement|null} listItem Destination list item. * @param {HTMLLIElement|null} targetItem Explicit style donor item. * @returns {string} Applied structural ID or an empty string. */ function inheritDestinationItemId(listItem, targetItem = null) { if (!listItem || listItem.nodeType !== Node.ELEMENT_NODE || listItem.tagName !== 'LI') { return ''; } const explicitTargetItem = targetItem && targetItem.nodeType === Node.ELEMENT_NODE && targetItem.tagName === 'LI' ? targetItem : null; const previousItem = listItem.previousElementSibling?.tagName === 'LI' ? listItem.previousElementSibling : null; const nextItem = listItem.nextElementSibling?.tagName === 'LI' ? listItem.nextElementSibling : null; const inheritedId = normalizeRuntimeUuid( explicitTargetItem?.getAttribute(LIST_ITEM_ID_ATTR) || previousItem?.getAttribute(LIST_ITEM_ID_ATTR) || nextItem?.getAttribute(LIST_ITEM_ID_ATTR) ); if (inheritedId) { listItem.setAttribute(LIST_ITEM_ID_ATTR, inheritedId); return inheritedId; } listItem.removeAttribute(LIST_ITEM_ID_ATTR); return ''; } /** * Apply one remove-list-item operation. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Target list item. * @returns {boolean} True when the mutation applied. */ function applyRemoveListItemOperation(tracker, listItem) { if (!tracker?.listElement || !listItem) { return false; } const oldParentList = listItem.parentElement; listItem.remove(); cleanupEmptyAncestorLists(tracker, oldParentList); return true; } /** * Apply one indent-list-item operation. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Target list item. * @returns {boolean} True when the mutation applied. */ function applyIndentListItemOperation(tracker, listItem) { if (!tracker?.listElement || !listItem) { return false; } const previousItem = listItem.previousElementSibling?.tagName === 'LI' ? listItem.previousElementSibling : null; if (!previousItem) { return false; } const nestedList = ensureDirectChildList(tracker, previousItem); nestedList.appendChild(listItem); return true; } /** * Apply one outdent-list-item operation. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Target list item. * @returns {boolean} True when the mutation applied. */ function applyOutdentListItemOperation(tracker, listItem) { if (!tracker?.listElement || !listItem) { return false; } const parentList = listItem.parentElement; const parentItem = parentList?.parentElement?.tagName === 'LI' ? parentList.parentElement : null; if (!parentList || !parentItem) { return false; } const ancestorList = parentItem.parentElement; const followingSiblings = []; let next = listItem.nextElementSibling; while (next) { followingSiblings.push(next); next = next.nextElementSibling; } ancestorList.insertBefore(listItem, parentItem.nextElementSibling); if (followingSiblings.length) { const nestedList = ensureDirectChildList(tracker, listItem, parentList.tagName); followingSiblings.forEach(sibling => nestedList.appendChild(sibling)); } cleanupEmptyAncestorLists(tracker, parentList); return true; } /** * Apply one toggle-list-type operation. * * @param {Object|null} tracker Active list tracker. * @param {Object} rawOperation Structural operation payload. * @param {Object} options Apply-operation options. * @returns {boolean} True when the mutation applied. */ function applyToggleListTypeOperation(tracker, rawOperation, options = {}) { if (!tracker?.listElement) { return false; } const listPath = rawOperation.listPath ?? rawOperation.list_path ?? ''; const targetList = getListByPath(tracker, listPath); const editorHost = options?.editorHost && typeof options.editorHost.changeListType === 'function' ? options.editorHost : null; const requestedType = targetList ? ( normalizeListTypeTagName( rawOperation.value ?? rawOperation.listType ?? rawOperation.list_type ?? rawOperation.ordered ) || (targetList.tagName === 'OL' ? 'UL' : 'OL') ) : ''; if ( !targetList || !requestedType || targetList.tagName === requestedType || !editorHost ) { return false; } const nextList = editorHost.changeListType(targetList, requestedType.toLowerCase(), { saveHistory: options.saveHistory !== false, restoreCursor: options.restoreCursor !== false, }); return !!nextList; } /** * Apply one update-list-item-text operation. * * @param {HTMLLIElement} listItem Target list item. * @param {Object} rawOperation Structural operation payload. * @returns {boolean} True when the mutation applied. */ function applyUpdateListItemTextOperation(listItem, rawOperation) { if (!listItem) { return false; } const directSurface = ensureDirectItemTextSurface(listItem); const html = typeof rawOperation?.contentHtml === 'string' ? rawOperation.contentHtml : (typeof rawOperation?.html === 'string' ? rawOperation.html : ''); const text = typeof rawOperation?.contentText === 'string' ? rawOperation.contentText : (typeof rawOperation?.text === 'string' ? rawOperation.text : ''); if (!directSurface) { return false; } directSurface.innerHTML = ''; if (html) { directSurface.innerHTML = html; } else if (text) { directSurface.textContent = text; } return true; } /** * Insert one new list item relative to explicit before/after/list anchors. * * @param {Object|null} tracker Active list tracker. * @param {Object} rawOperation Structural operation payload. * @param {Object} trackerApi List tracker API surface. * @returns {boolean} True when the mutation applied. */ function applyInsertListItemOperation(tracker, rawOperation, trackerApi) { if (!tracker?.listElement || !trackerApi) { return false; } const beforePath = rawOperation.beforePath ?? rawOperation.before_path ?? ''; const afterPath = rawOperation.afterPath ?? rawOperation.after_path ?? ''; const listPath = rawOperation.listPath ?? rawOperation.list_path ?? ''; const beforeItem = trackerApi.getItemByPath(tracker, beforePath); const afterItem = trackerApi.getItemByPath(tracker, afterPath); const newListItem = buildListItemFromOperation(rawOperation); if (beforeItem?.parentElement) { beforeItem.parentElement.insertBefore(newListItem, beforeItem); copyDonorItemAttributes(newListItem, beforeItem); inheritDestinationItemId(newListItem, beforeItem); return true; } if (afterItem?.parentElement) { afterItem.parentElement.insertBefore(newListItem, afterItem.nextElementSibling); copyDonorItemAttributes(newListItem, afterItem); inheritDestinationItemId(newListItem, afterItem); return true; } const targetList = getListByPath(tracker, listPath); if (!targetList) { return false; } const position = typeof rawOperation.position === 'string' ? rawOperation.position.trim().toLowerCase() : 'append'; if (position === 'prepend' && targetList.firstElementChild) { targetList.insertBefore(newListItem, targetList.firstElementChild); } else { targetList.appendChild(newListItem); } inheritDestinationItemId(newListItem); return true; } /** * Move one existing list item relative to explicit before/after/list anchors. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Target list item. * @param {Object} rawOperation Structural operation payload. * @param {Object} trackerApi List tracker API surface. * @returns {boolean} True when the mutation applied. */ function applyMoveListItemOperation(tracker, listItem, rawOperation, trackerApi) { if (!tracker?.listElement || !listItem || !trackerApi) { return false; } const beforePath = rawOperation.beforePath ?? rawOperation.before_path ?? ''; const afterPath = rawOperation.afterPath ?? rawOperation.after_path ?? ''; const listPath = rawOperation.listPath ?? rawOperation.list_path ?? ''; const beforeItem = trackerApi.getItemByPath(tracker, beforePath); const afterItem = trackerApi.getItemByPath(tracker, afterPath); const oldParentList = listItem.parentElement; let didApply = false; if (beforeItem && beforeItem !== listItem && !listItem.contains(beforeItem)) { beforeItem.parentElement.insertBefore(listItem, beforeItem); copyDonorItemAttributes(listItem, beforeItem); inheritDestinationItemId(listItem, beforeItem); didApply = true; } else if (afterItem && afterItem !== listItem && !listItem.contains(afterItem)) { afterItem.parentElement.insertBefore(listItem, afterItem.nextElementSibling); copyDonorItemAttributes(listItem, afterItem); inheritDestinationItemId(listItem, afterItem); didApply = true; } else if (typeof listPath === 'string') { const targetList = getListByPath(tracker, listPath); const ownerItem = targetList?.parentElement?.tagName === 'LI' ? targetList.parentElement : null; if (targetList && ownerItem !== listItem && !listItem.contains(ownerItem || null)) { const position = typeof rawOperation.position === 'string' ? rawOperation.position.trim().toLowerCase() : 'append'; if (position === 'prepend' && targetList.firstElementChild) { targetList.insertBefore(listItem, targetList.firstElementChild); } else { targetList.appendChild(listItem); } inheritDestinationItemId(listItem); didApply = true; } } if (didApply) { cleanupEmptyAncestorLists(tracker, oldParentList); } return didApply; } /** * Resolve one tracked list element from a list-path payload. * * The root list lives at the empty path. Nested lists are addressed by the * tree path of the parent item that owns that child list. * * @param {Object|null} tracker Active list tracker. * @param {string|Array} pathValue Root-empty list path or parent-item path. * @returns {HTMLElement|null} Matching list element. */ function getListByPath(tracker, pathValue) { if (!tracker?.listElement) { return null; } if ( pathValue === '' || pathValue === null || typeof pathValue === 'undefined' || (Array.isArray(pathValue) && !pathValue.length) || (typeof pathValue === 'string' && !pathValue.trim()) ) { return tracker.listElement; } const parentItem = ListBlockTracker.getItemByPath(tracker, pathValue); return parentItem ? getDirectChildList(parentItem) : null; } /** * Normalize one requested list-type value to a DOM tag name. * * @param {*} value Candidate list-type value. * @returns {string} `OL`, `UL`, or an empty string. */ function normalizeListTypeTagName(value) { if (value === true) { return 'OL'; } if (value === false) { return 'UL'; } const normalized = String(value || '').trim().toLowerCase(); if (normalized === 'ordered' || normalized === 'ol' || normalized === 'true') { return 'OL'; } if (normalized === 'unordered' || normalized === 'ul' || normalized === 'false') { return 'UL'; } return ''; } const ListBlockTracker = { active: null, /** * Initialize tracker for a list element * @param {HTMLElement} listElement - The UL or OL element * @param {Object} originalBlock - The complete WordPress block structure */ init(listElement, originalBlock = {}) { if (!createBlock || !serializeBlocks) { console.error('wp.blocks not available'); } const tracker = { listElement, originalBlock: JSON.parse(JSON.stringify(originalBlock)), uuidMap: new Map(), // uuid -> {type, attrs, element} domMap: new WeakMap(), // element -> uuid runtimeUuidMap: new Map(), // runtimeUuid -> {type, element} runtimeDomMap: new WeakMap() // element -> runtimeUuid }; // Attach tracker to element to avoid singleton issues listElement._mwpListTracker = tracker; // Build UUID tracking from DOM and original block structure this.buildFromDOM(tracker, listElement, originalBlock); this.active = tracker; return tracker; }, /** * Build UUID mappings from DOM and original block structure * Assigns UUIDs to all lists and list items, mapping to their original attrs */ buildFromDOM(tracker, listElement, originalBlock) { const previousEntries = tracker.uuidMap instanceof Map ? new Map(tracker.uuidMap) : new Map(); const previousRuntimeEntries = tracker.runtimeUuidMap instanceof Map ? new Map(tracker.runtimeUuidMap) : new Map(); tracker.uuidMap.clear(); tracker.domMap = new WeakMap(); tracker.runtimeUuidMap.clear(); tracker.runtimeDomMap = new WeakMap(); tracker.listElement = listElement; this.syncEditableTextSurfaces(listElement); this.registerRuntimeIdentity( tracker, listElement, 'list', previousRuntimeEntries ); // Assign UUID to root list and map to original attrs const rootUuid = this.getOrCreateUuid(listElement, 'list'); const previousRootEntry = previousEntries.get(rootUuid); tracker.uuidMap.set(rootUuid, { type: 'list', attrs: previousRootEntry?.attrs ? cloneListAttrs(previousRootEntry.attrs, true) : cloneListAttrs(originalBlock.attrs || {}, true), element: listElement }); tracker.domMap.set(listElement, rootUuid); // Recursively process list structure this.processListRecursive( tracker, listElement, originalBlock.innerBlocks || [], previousEntries, previousRuntimeEntries ); }, /** * Recursively process list items and nested lists, assigning UUIDs */ processListRecursive( tracker, listElement, originalItems, previousEntries = new Map(), previousRuntimeEntries = new Map() ) { const items = getDirectListItems(listElement); items.forEach((li, index) => { this.syncEditableTextSurfaces(li); const originalItem = originalItems[index] || {}; this.registerRuntimeIdentity( tracker, li, 'item', previousRuntimeEntries ); const itemUuid = this.getOrCreateUuid(li, 'item'); const previousItemEntry = previousEntries.get(itemUuid); // Map UUID to original item attrs tracker.uuidMap.set(itemUuid, { type: 'item', attrs: previousItemEntry?.attrs ? JSON.parse(JSON.stringify(previousItemEntry.attrs || {})) : JSON.parse(JSON.stringify(originalItem.attrs || {})), element: li }); tracker.domMap.set(li, itemUuid); // Handle nested lists const nestedList = getDirectChildList(li); if (nestedList) { const originalNested = originalItem.innerBlocks?.[0] || {}; this.registerRuntimeIdentity( tracker, nestedList, 'list', previousRuntimeEntries ); const nestedUuid = this.getOrCreateUuid(nestedList, 'list'); const previousNestedEntry = previousEntries.get(nestedUuid); // Map nested list attrs without plugin UUID ownership. // The tracker still needs a temporary DOM identity for list // editing, but persisting mwpSfeUuid* on nested lists would // fracture one logical list into multiple save/history roots. tracker.uuidMap.set(nestedUuid, { type: 'list', attrs: previousNestedEntry?.attrs ? cloneListAttrs(previousNestedEntry.attrs, false) : cloneListAttrs(originalNested.attrs || {}, false), element: nestedList }); tracker.domMap.set(nestedList, nestedUuid); // Recurse into nested list this.processListRecursive( tracker, nestedList, originalNested.innerBlocks || [], previousEntries, previousRuntimeEntries ); } }); }, /** * Register one list or list-item runtime identity on the tracker. * * @param {Object} tracker Active list tracker. * @param {Element} element Live list or list-item element. * @param {string} type Supported runtime identity type. * @param {Map} previousRuntimeEntries Previous runtime entry map. * @returns {string} Resolved runtime UUID. */ registerRuntimeIdentity( tracker, element, type, previousRuntimeEntries = new Map() ) { const runtimeUuid = this.getOrCreateRuntimeUuid( tracker, element, type, previousRuntimeEntries ); if (!runtimeUuid) { return ''; } tracker.runtimeUuidMap.set(runtimeUuid, { type, element, }); tracker.runtimeDomMap.set(element, runtimeUuid); return runtimeUuid; }, /** * Return whether one runtime UUID is already owned by a different element. * * Native contenteditable list splitting can clone DOM attributes from the * source item into the newly created sibling. When that happens, the new * runtime UUID must be reseeded so each live cursor target stays unique. * * @param {Object} tracker Active list tracker. * @param {string} runtimeUuid Candidate runtime UUID. * @param {Element|null} element Element requesting that UUID. * @returns {boolean} True when the UUID belongs elsewhere. */ isRuntimeUuidClaimedByDifferentElement(tracker, runtimeUuid, element) { const normalizedRuntimeUuid = normalizeRuntimeUuid(runtimeUuid); if (!tracker?.runtimeUuidMap || !normalizedRuntimeUuid) { return false; } const existingEntry = tracker.runtimeUuidMap.get(normalizedRuntimeUuid); return !!(existingEntry?.element && existingEntry.element !== element); }, /** * Get the inherited structural ID for an element or seed it from the * runtime UUID when it does not exist yet. * * Structural IDs may be intentionally copied by native list splitting so * related items can retain style inheritance. They are not treated as * unique runtime cursor identifiers. */ getOrCreateUuid(element, type) { const attrName = type === 'list' ? LIST_ID_ATTR : LIST_ITEM_ID_ATTR; let uuid = element.getAttribute(attrName); if (!uuid) { uuid = normalizeRuntimeUuid( element.getAttribute( type === 'list' ? LIST_RUNTIME_UUID_ATTR : LIST_ITEM_RUNTIME_UUID_ATTR ) ) || this.generateTempUuid(); element.setAttribute(attrName, uuid); } return uuid; }, /** * Return the existing runtime UUID for one element or create one. * * Caller-supplied runtime UUIDs win for newly created items/lists. When an * element already belongs to the previous tracker build, its existing * runtime UUID is preserved so API references remain stable across rebuilds. * * @param {Object} tracker Active list tracker. * @param {Element} element Live list or list-item element. * @param {string} type Supported runtime identity type. * @param {Map} previousRuntimeEntries Previous runtime entry map. * @returns {string} Session-scoped runtime UUID. */ getOrCreateRuntimeUuid( tracker, element, type, previousRuntimeEntries = new Map() ) { const attrName = getRuntimeUuidAttributeName(type); if (!attrName || !isRuntimeIdentityElement(element, type)) { return ''; } let runtimeUuid = normalizeRuntimeUuid(element.getAttribute(attrName)); if (!runtimeUuid) { for (const [candidateUuid, entry] of previousRuntimeEntries.entries()) { if (entry?.element === element && entry.type === type) { runtimeUuid = normalizeRuntimeUuid(candidateUuid); break; } } } if (this.isRuntimeUuidClaimedByDifferentElement(tracker, runtimeUuid, element)) { runtimeUuid = ''; } if (!runtimeUuid) { runtimeUuid = this.generateTempUuid(); } element.setAttribute(attrName, runtimeUuid); return runtimeUuid; }, /** * Generate a RFC4122 version 4 UUID */ generateTempUuid() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { const r = Math.random() * 16 | 0; const v = c === 'x' ? r : (r & 0x3 | 0x8); return v.toString(16); }); }, /** * Return the zero-based tree path for one list item inside the tracked list. * * @param {Object} tracker Active list tracker. * @param {HTMLLIElement} listItem Candidate list item. * @returns {number[]|null} Zero-based indexes, or null on failure. */ getPathIndexesForItem(tracker, listItem) { if ( !tracker?.listElement || !listItem || listItem.nodeType !== Node.ELEMENT_NODE || listItem.tagName !== 'LI' || !tracker.listElement.contains(listItem) ) { return null; } const indexes = []; let currentItem = listItem; while (currentItem && tracker.listElement.contains(currentItem)) { const parentList = currentItem.parentElement; if (!parentList || (parentList.tagName !== 'UL' && parentList.tagName !== 'OL')) { return null; } const siblingItems = getDirectListItems(parentList); const itemIndex = siblingItems.indexOf(currentItem); if (itemIndex < 0) { return null; } indexes.unshift(itemIndex); const nextItem = parentList.closest('li'); if (!nextItem || !tracker.listElement.contains(nextItem)) { break; } currentItem = nextItem; } return indexes.length ? indexes : null; }, /** * Return the direct list item currently living at one tree path. * * @param {Object} tracker Active list tracker. * @param {string|Array} pathValue Zero-based path value. * @returns {HTMLLIElement|null} Matching list item. */ getItemByPath(tracker, pathValue) { const indexes = normalizePathIndexes(pathValue); if (!tracker?.listElement || !Array.isArray(indexes) || !indexes.length) { return null; } let currentList = tracker.listElement; let currentItem = null; for (let index = 0; index < indexes.length; index++) { const itemIndex = indexes[index]; const siblingItems = getDirectListItems(currentList); currentItem = siblingItems[itemIndex] || null; if (!currentItem) { return null; } if (index === indexes.length - 1) { return currentItem; } currentList = getDirectChildList(currentItem); if (!currentList) { return null; } } return currentItem; }, /** * Resolve one list element back to its public list path. * * The root list is addressed as an empty string. Nested child lists are * addressed by the path of the parent list item that owns them. * * @param {Object|null} tracker Active list tracker. * @param {HTMLElement|null} listElement Candidate list element. * @returns {string} Root-relative list path. */ getPathForList(tracker, listElement) { if (!tracker) tracker = this.active; if (!tracker?.listElement || !listElement || listElement.nodeType !== Node.ELEMENT_NODE) { return ''; } if (listElement === tracker.listElement) { return ''; } const parentItem = ( listElement.parentElement && listElement.parentElement.tagName === 'LI' ) ? listElement.parentElement : null; if (!parentItem) { return ''; } const indexes = this.getPathIndexesForItem(tracker, parentItem); return Array.isArray(indexes) ? indexes.join('_') : ''; }, /** * Return one tracked list item by runtime UUID. * * @param {Object|null} tracker Active list tracker. * @param {string} runtimeUuid Session-scoped item UUID. * @returns {HTMLLIElement|null} Matching list item. */ getItemByRuntimeUuid(tracker, runtimeUuid) { if (!tracker) tracker = this.active; const element = findElementByRuntimeUuid(tracker, runtimeUuid, 'item'); return element && element.tagName === 'LI' ? element : null; }, /** * Return one tracked list by runtime UUID. * * @param {Object|null} tracker Active list tracker. * @param {string} runtimeUuid Session-scoped list UUID. * @returns {HTMLElement|null} Matching list element. */ getListByRuntimeUuid(tracker, runtimeUuid) { if (!tracker) tracker = this.active; const element = findElementByRuntimeUuid(tracker, runtimeUuid, 'list'); return isListElementForRuntimeLookup(element) ? element : null; }, /** * Return the runtime UUID for one tracked list item. * * @param {Object|null} tracker Active list tracker. * @param {HTMLLIElement} listItem Live list item. * @returns {string} Session-scoped item UUID. */ getRuntimeUuidForItem(tracker, listItem) { if (!tracker) tracker = this.active; if (!tracker?.listElement || !listItem || listItem.tagName !== 'LI') { return ''; } return normalizeRuntimeUuid( listItem.getAttribute(LIST_ITEM_RUNTIME_UUID_ATTR) || tracker.runtimeDomMap?.get(listItem) ); }, /** * Return the runtime UUID for one tracked list. * * @param {Object|null} tracker Active list tracker. * @param {HTMLElement} listElement Live list element. * @returns {string} Session-scoped list UUID. */ getRuntimeUuidForList(tracker, listElement) { if (!tracker) tracker = this.active; if (!tracker?.listElement || !isListElementForRuntimeLookup(listElement)) { return ''; } return normalizeRuntimeUuid( listElement.getAttribute(LIST_RUNTIME_UUID_ATTR) || tracker.runtimeDomMap?.get(listElement) ); }, /** * Parse current DOM list structure to WordPress block format * Uses UUID to preserve original attrs, updates only content and ordered * * @param {HTMLElement} listElement Live UL/OL element. * @param {Object} tracker Active list tracker. * @param {boolean} allowUuidOwnership True only for the outermost * core/list. Nested lists must * serialize without persisted * plugin UUID attrs. */ parseListToBlock(listElement, tracker, allowUuidOwnership = true) { const isOrdered = listElement.tagName === 'OL'; const uuid = listElement.getAttribute(LIST_ID_ATTR); let attrs = { ordered: isOrdered }; if (uuid && tracker && tracker.uuidMap.has(uuid)) { const original = tracker.uuidMap.get(uuid); const originalAttrs = (Array.isArray(original.attrs) || !original.attrs) ? {} : cloneListAttrs(original.attrs, allowUuidOwnership); attrs = { ...originalAttrs, ordered: isOrdered }; } const listItems = Array.from(listElement.children).filter(el => el.tagName === 'LI'); const innerBlocks = listItems.map(li => this.parseListItemToBlock(li, tracker)); return createBlock('core/list', attrs, innerBlocks); }, /** * Parse a list item to WordPress block format * Preserves original attrs if UUID exists */ parseListItemToBlock(liElement, tracker) { const uuid = liElement.getAttribute(LIST_ITEM_ID_ATTR); let attrs = {}; if (uuid && tracker && tracker.uuidMap.has(uuid)) { const original = tracker.uuidMap.get(uuid); attrs = JSON.parse(JSON.stringify(original.attrs || {})); } // Recurse into nested list using the live element before cloning const innerBlocks = []; const nestedListEl = liElement.querySelector(':scope > ul, :scope > ol'); if (nestedListEl) { innerBlocks.push(this.parseListToBlock(nestedListEl, tracker, false)); } const clone = liElement.cloneNode(true); const directSurface = clone.querySelector(`:scope > [${LIST_ITEM_TEXT_ATTR}="1"]`); let content = ''; if (directSurface) { const cleanedSurface = this.cleanElement(directSurface); content = cleanedSurface.innerHTML.trim(); } else { const nestedInClone = clone.querySelector(':scope > ul, :scope > ol'); if (nestedInClone) nestedInClone.remove(); const cleaned = this.cleanElement(clone); content = cleaned.innerHTML.trim(); } return createBlock('core/list-item', { ...attrs, content }, innerBlocks); }, /** * Clean element using ElementPrep * Removes editing artifacts while preserving UUIDs and content */ cleanElement(element) { if (SFE.ElementPrep) { return SFE.ElementPrep.clean(element, { removeIdentity: true, removeControls: true, clone: false // Already working with a clone }); } console.error('ElementPrep not found'); return element; }, /** * Serialize the current list structure to WordPress block format * Preserves all original attrs, updates only content and ordered */ serialize(tracker) { if (!tracker) tracker = this.active; if (!tracker) return null; const block = this.parseListToBlock(tracker.listElement, tracker); return serializeBlocks([block]); }, /** * Update the tracker's element reference * Used when the list element is replaced (e.g., OL to UL conversion) */ updateElement(tracker, newElement) { if (!tracker) tracker = this.active; if (!tracker) return; // Ensure new element keeps the tracker reference newElement._mwpListTracker = tracker; this.syncEditableTextSurfaces(newElement); tracker.listElement = newElement; // Update element references in uuidMap tracker.uuidMap.forEach((value, key) => { if (value.type === 'list') { const newEl = newElement.querySelector(`[${LIST_ID_ATTR}="${key}"]`) || (newElement.getAttribute(LIST_ID_ATTR) === key ? newElement : null); if (newEl) { value.element = newEl; } } else if (value.type === 'item') { const newEl = newElement.querySelector(`[${LIST_ITEM_ID_ATTR}="${key}"]`); if (newEl) { value.element = newEl; } } }); tracker.runtimeUuidMap.forEach((value, key) => { if (value.type === 'list') { const newEl = this.getListByRuntimeUuid(tracker, key); if (newEl) { value.element = newEl; tracker.runtimeDomMap.set(newEl, key); } } else if (value.type === 'item') { const newEl = this.getItemByRuntimeUuid(tracker, key); if (newEl) { value.element = newEl; tracker.runtimeDomMap.set(newEl, key); } } }); }, /** * Return one tree-aware structural snapshot for the active list. * * @param {Object|null} tracker Active list tracker. * @returns {Object|null} Lightweight structure snapshot. */ getStructure(tracker) { if (!tracker) tracker = this.active; if (!tracker?.listElement) { return null; } const buildListNode = (listElement, listPath = '', parentIndexes = []) => ({ listUuid: this.getRuntimeUuidForList(tracker, listElement), listPath, ordered: listElement.tagName === 'OL', items: getDirectListItems(listElement).map((listItem, index) => { const indexes = [ ...parentIndexes, index ]; const pathMeta = buildPathMeta(indexes); const directSurface = ensureDirectItemTextSurface(listItem); const nestedList = getDirectChildList(listItem); return { itemUuid: this.getRuntimeUuidForItem(tracker, listItem), path: pathMeta.path, pathLabel: pathMeta.pathLabel, depth: pathMeta.depth, contentHtml: directSurface ? directSurface.innerHTML.trim() : '', childList: nestedList ? buildListNode(nestedList, pathMeta.path, indexes) : null, }; }), }); return buildListNode(tracker.listElement, '', []); }, /** * Apply one primitive structural list operation against the live tracked * DOM. * * Public API calls are translated into this lower-level operation set by * the shared schema executor so the tracker only needs to understand the * canonical primitive mutation layer. * * Supported primitive kinds: * - `insert_list_item` * - `remove_list_item` * - `move_list_item` * - `indent_list_item` * - `outdent_list_item` * - `update_list_item_text` * - `toggle_list_type` * * @param {Object|null} tracker Active list tracker. * @param {Object} rawOperation Structural operation payload. * @returns {Object|null} Result summary when applied. */ applyOperation(tracker, rawOperation, options = {}) { if (!tracker) tracker = this.active; if (!tracker?.listElement || !rawOperation || typeof rawOperation !== 'object') { return null; } const kind = typeof rawOperation.kind === 'string' ? rawOperation.kind.trim().toLowerCase() : ''; const path = rawOperation.path ?? rawOperation.itemPath ?? rawOperation.item_path ?? ''; const listItem = this.getItemByPath(tracker, path); let didApply = false; if (kind === 'remove_list_item' && listItem) { didApply = applyRemoveListItemOperation(tracker, listItem); } else if (kind === 'indent_list_item' && listItem) { didApply = applyIndentListItemOperation(tracker, listItem); } else if (kind === 'outdent_list_item' && listItem) { didApply = applyOutdentListItemOperation(tracker, listItem); } else if (kind === 'toggle_list_type') { didApply = applyToggleListTypeOperation(tracker, rawOperation, options); } else if (kind === 'update_list_item_text' && listItem) { didApply = applyUpdateListItemTextOperation(listItem, rawOperation); } else if (kind === 'insert_list_item') { didApply = applyInsertListItemOperation(tracker, rawOperation, this); } else if (kind === 'move_list_item' && listItem) { didApply = applyMoveListItemOperation(tracker, listItem, rawOperation, this); } if (!didApply) { return null; } this.syncEditableTextSurfaces(tracker.listElement); this.buildFromDOM(tracker, tracker.listElement, tracker.originalBlock || {}); return { kind, structure: this.getStructure(tracker), }; }, /** * Ensure every list item in one tree has one direct text surface. * * @param {HTMLElement|null} rootElement Candidate list root or list item. * @returns {HTMLElement|null} Normalized root element. */ syncEditableTextSurfaces(rootElement) { if (!rootElement || rootElement.nodeType !== Node.ELEMENT_NODE) { return null; } if (rootElement.tagName === 'LI') { ensureDirectItemTextSurface(rootElement); Array.from(rootElement.children || []) .filter(child => isNestedListNode(child)) .forEach(childList => this.syncEditableTextSurfaces(childList)); return rootElement; } if (rootElement.tagName !== 'UL' && rootElement.tagName !== 'OL') { return rootElement; } Array.from(rootElement.children || []) .filter(child => child.tagName === 'LI') .forEach(li => this.syncEditableTextSurfaces(li)); return rootElement; }, /** * Ensure runtime UUID attributes are unique within one live list tree. * * Native contenteditable list splitting can clone `li` and nested list * attributes verbatim before FrontEdit regains control. This pass reseeds only the * session-scoped runtime UUID attributes so freshly created structures become * distinct live API/editor targets immediately, while leaving `data-item-id` * and `data-list-id` untouched for their separate responsibilities. * * @param {HTMLElement|null} rootElement Candidate list root. * @returns {HTMLElement|null} Normalized root element. */ ensureUniqueRuntimeUuids(rootElement) { if ( !rootElement || rootElement.nodeType !== Node.ELEMENT_NODE || (rootElement.tagName !== 'UL' && rootElement.tagName !== 'OL') ) { return rootElement || null; } const seenListRuntimeUuids = new Set(); const seenItemRuntimeUuids = new Set(); const collectLists = [ rootElement, ...Array.from(rootElement.querySelectorAll('ul, ol')) ]; const collectItems = Array.from(rootElement.querySelectorAll('li')); collectLists.forEach(listElement => { const runtimeUuid = normalizeRuntimeUuid( listElement.getAttribute(LIST_RUNTIME_UUID_ATTR) ); if (!runtimeUuid) { return; } if (seenListRuntimeUuids.has(runtimeUuid)) { listElement.setAttribute(LIST_RUNTIME_UUID_ATTR, this.generateTempUuid()); return; } seenListRuntimeUuids.add(runtimeUuid); }); collectItems.forEach(listItem => { const runtimeUuid = normalizeRuntimeUuid( listItem.getAttribute(LIST_ITEM_RUNTIME_UUID_ATTR) ); if (!runtimeUuid) { return; } if (seenItemRuntimeUuids.has(runtimeUuid)) { listItem.setAttribute(LIST_ITEM_RUNTIME_UUID_ATTR, this.generateTempUuid()); return; } seenItemRuntimeUuids.add(runtimeUuid); }); return rootElement; }, /** * Ensure one live list tree has the required structural IDs and runtime UUIDs. * * On first editor activation, list elements may not yet have either identity * attribute family. Seed both from one generated UUID per element so the * initial history snapshot captures stable targeting data. Later native list * splits may intentionally copy the structural IDs; in those cases this pass * preserves the structural IDs and only reseeds duplicated runtime UUIDs. * * @param {HTMLElement|null} rootElement Candidate list root. * @returns {HTMLElement|null} Normalized root element. */ ensureIdentityAttributes(rootElement) { if ( !rootElement || rootElement.nodeType !== Node.ELEMENT_NODE || (rootElement.tagName !== 'UL' && rootElement.tagName !== 'OL') ) { return rootElement || null; } const syncIdentityPair = (element, structuralAttrName, runtimeAttrName) => { if (!element || element.nodeType !== Node.ELEMENT_NODE) { return; } let structuralId = normalizeRuntimeUuid( element.getAttribute(structuralAttrName) ); let runtimeUuid = normalizeRuntimeUuid( element.getAttribute(runtimeAttrName) ); if (!structuralId && !runtimeUuid) { runtimeUuid = this.generateTempUuid(); structuralId = runtimeUuid; } else if (!runtimeUuid) { runtimeUuid = structuralId; } else if (!structuralId) { structuralId = runtimeUuid; } element.setAttribute(structuralAttrName, structuralId); element.setAttribute(runtimeAttrName, runtimeUuid); }; syncIdentityPair(rootElement, LIST_ID_ATTR, LIST_RUNTIME_UUID_ATTR); Array.from(rootElement.querySelectorAll('ul, ol')).forEach(listElement => { syncIdentityPair(listElement, LIST_ID_ATTR, LIST_RUNTIME_UUID_ATTR); }); Array.from(rootElement.querySelectorAll('li')).forEach(listItem => { syncIdentityPair(listItem, LIST_ITEM_ID_ATTR, LIST_ITEM_RUNTIME_UUID_ATTR); }); return this.ensureUniqueRuntimeUuids(rootElement); }, getDirectItemTextSurface, normalizePathIndexes, buildPathMeta, getRuntimeUuidAttributeName, getListRuntimeUuidAttributeName() { return LIST_RUNTIME_UUID_ATTR; }, getListItemRuntimeUuidAttributeName() { return LIST_ITEM_RUNTIME_UUID_ATTR; }, getListIdAttributeName() { return LIST_ID_ATTR; }, getListItemIdAttributeName() { return LIST_ITEM_ID_ATTR; }, /** * Destroy tracker and clean up */ destroy(tracker) { if (!tracker) tracker = this.active; if (!tracker) return; tracker.uuidMap.clear(); tracker.runtimeUuidMap.clear(); if (tracker.listElement) { delete tracker.listElement._mwpListTracker; } if (this.active === tracker) this.active = null; } }; /** * Return whether one element is a live list node for runtime lookup helpers. * * @param {Element|null} element Candidate DOM element. * @returns {boolean} True when the element is `UL` or `OL`. */ function isListElementForRuntimeLookup(element) { return !!( element && element.nodeType === Node.ELEMENT_NODE && (element.tagName === 'UL' || element.tagName === 'OL') ); } // Expose globally SFE.ListBlockTracker = ListBlockTracker; })(); {"id":46554,"date":"2026-08-08T03:22:05","date_gmt":"2026-08-08T03:22:05","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T22:00:00","slug":"how-to-beat-a-casino-slot-machine","status":"publish","type":"post","link":"https:\/\/alumni.pr.ac.rs\/en\/how-to-beat-a-casino-slot-machine\/","title":{"rendered":"How To Beat A Casino Slot Machine"},"content":{"rendered":"

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