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Edit File : block-serialization-default-parser.js \| Size : 14.87 KB
/****/ (() => { // webpackBootstrap /**/ "use strict"; /**/ // The require scope /**/ var __webpack_require__ = {}; /**/ /********************************************************************/ /***/ / webpack/runtime/define property getters / /***/ (() => { /**/ // define getter functions for harmony exports /**/ __webpack_require__.d = (exports, definition) => { /**/ for(var key in definition) { /**/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) { /**/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] }); /**/ } /**/ } /**/ }; /**/ })(); /**/ /***/ / webpack/runtime/hasOwnProperty shorthand / /***/ (() => { /**/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop)) /**/ })(); /**/ /***/ / webpack/runtime/make namespace object / /***/ (() => { /**/ // define __esModule on exports /**/ __webpack_require__.r = (exports) => { /**/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) { /**/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' }); /**/ } /**/ Object.defineProperty(exports, '__esModule', { value: true }); /**/ }; /**/ })(); /**/ /*********************************************************************/ var __webpack_exports__ = {}; __webpack_require__.r(__webpack_exports__); / harmony export / __webpack_require__.d(__webpack_exports__, { / harmony export / parse: () => (/ binding / parse) / harmony export / }); /* * @type {string} / let document; /* * @type {number} / let offset; /* * @type {ParsedBlock[]} / let output; /* * @type {ParsedFrame[]} / let stack; /* * @typedef {Object\|null} Attributes / /* * @typedef {Object} ParsedBlock * @property {string\|null} blockName Block name. * @property {Attributes} attrs Block attributes. * @property {ParsedBlock[]} innerBlocks Inner blocks. * @property {string} innerHTML Inner HTML. * @property {Array<string\|null>} innerContent Inner content. / /* * @typedef {Object} ParsedFrame * @property {ParsedBlock} block Block. * @property {number} tokenStart Token start. * @property {number} tokenLength Token length. * @property {number} prevOffset Previous offset. * @property {number\|null} leadingHtmlStart Leading HTML start. / /* * @typedef {'no-more-tokens'\|'void-block'\|'block-opener'\|'block-closer'} TokenType / /* * @typedef {[TokenType, string, Attributes, number, number]} Token / /* * Matches block comment delimiters * * While most of this pattern is straightforward the attribute parsing * incorporates a tricks to make sure we don't choke on specific input * * - since JavaScript has no possessive quantifier or atomic grouping * we are emulating it with a trick * * we want a possessive quantifier or atomic group to prevent backtracking * on the `}`s should we fail to match the remainder of the pattern * * we can emulate this with a positive lookahead and back reference * (a++)c === ((?=(a+))\1)c * * let's examine an example: * - /(a+)c/.test('aaaaaaaaaaaaad') fails after over 49,000 steps - /(a++)c/.test('aaaaaaaaaaaaad') fails after 85 steps - /(?>a+)c/.test('aaaaaaaaaaaaad') fails after 126 steps * this is because the possessive `++` and the atomic group `(?>)` * tell the engine that all those `a`s belong together as a single group * and so it won't split it up when stepping backwards to try and match * * if we use /((?=(a+))\1)c/ then we get the same behavior as the atomic group or possessive and prevent the backtracking because the `a+` is matched but * not captured. thus, we find the long string of `a`s and remember it, then * reference it as a whole unit inside our pattern * * @see http://instanceof.me/post/52245507631/regex-emulate-atomic-grouping-with-lookahead * @see http://blog.stevenlevithan.com/archives/mimic-atomic-groups * @see https://javascript.info/regexp-infinite-backtracking-problem * * once browsers reliably support atomic grouping or possessive * quantifiers natively we should remove this trick and simplify * * @type {RegExp} * * @since 3.8.0 * @since 4.6.1 added optimization to prevent backtracking on attribute parsing / const tokenizer = /<!--\s+(\/)?wp:([a-z][a-z0-9_-]\/)?([a-z][a-z0-9_-])\s+({(?:(?=([^}]+\|}+(?=})\|(?!}\s+\/?-->)[^]))\5\|[^]?)}\s+)?(\/)?-->/g; /* * Constructs a block object. * * @param {string\|null} blockName * @param {Attributes} attrs * @param {ParsedBlock[]} innerBlocks * @param {string} innerHTML * @param {string[]} innerContent * @return {ParsedBlock} The block object. / function Block(blockName, attrs, innerBlocks, innerHTML, innerContent) { return { blockName, attrs, innerBlocks, innerHTML, innerContent }; } /* * Constructs a freeform block object. * * @param {string} innerHTML * @return {ParsedBlock} The freeform block object. / function Freeform(innerHTML) { return Block(null, {}, [], innerHTML, [innerHTML]); } /* * Constructs a frame object. * * @param {ParsedBlock} block * @param {number} tokenStart * @param {number} tokenLength * @param {number} prevOffset * @param {number\|null} leadingHtmlStart * @return {ParsedFrame} The frame object. / function Frame(block, tokenStart, tokenLength, prevOffset, leadingHtmlStart) { return { block, tokenStart, tokenLength, prevOffset: prevOffset \|\| tokenStart + tokenLength, leadingHtmlStart }; } /* * Parser function, that converts input HTML into a block based structure. * * @param {string} doc The HTML document to parse. * * @example * Input post: * ```html * <!-- wp:columns {"columns":3} --> * <div class="wp-block-columns has-3-columns"><!-- wp:column --> * <div class="wp-block-column"><!-- wp:paragraph --> * <p>Left</p> * <!-- /wp:paragraph --></div> * <!-- /wp:column --> * * <!-- wp:column --> * <div class="wp-block-column"><!-- wp:paragraph --> * <p><strong>Middle</strong></p> * <!-- /wp:paragraph --></div> * <!-- /wp:column --> * * <!-- wp:column --> * <div class="wp-block-column"></div> * <!-- /wp:column --></div> * <!-- /wp:columns --> * ``` * * Parsing code: * ```js * import { parse } from '@wordpress/block-serialization-default-parser'; * * parse( post ) === [ * { * blockName: "core/columns", * attrs: { * columns: 3 * }, * innerBlocks: [ * { * blockName: "core/column", * attrs: null, * innerBlocks: [ * { * blockName: "core/paragraph", * attrs: null, * innerBlocks: [], * innerHTML: "\n<p>Left</p>\n" * } * ], * innerHTML: '\n<div class="wp-block-column"></div>\n' * }, * { * blockName: "core/column", * attrs: null, * innerBlocks: [ * { * blockName: "core/paragraph", * attrs: null, * innerBlocks: [], * innerHTML: "\n<p><strong>Middle</strong></p>\n" * } * ], * innerHTML: '\n<div class="wp-block-column"></div>\n' * }, * { * blockName: "core/column", * attrs: null, * innerBlocks: [], * innerHTML: '\n<div class="wp-block-column"></div>\n' * } * ], * innerHTML: '\n<div class="wp-block-columns has-3-columns">\n\n\n\n</div>\n' * } * ]; * ``` * @return {ParsedBlock[]} A block-based representation of the input HTML. / const parse = doc => { document = doc; offset = 0; output = []; stack = []; tokenizer.lastIndex = 0; do { // twiddle our thumbs } while (proceed()); return output; }; /* * Parses the next token in the input document. * * @return {boolean} Returns true when there is more tokens to parse. / function proceed() { const stackDepth = stack.length; const next = nextToken(); const [tokenType, blockName, attrs, startOffset, tokenLength] = next; // We may have some HTML soup before the next block. const leadingHtmlStart = startOffset > offset ? offset : null; switch (tokenType) { case 'no-more-tokens': // If not in a block then flush output. if (0 === stackDepth) { addFreeform(); return false; } // Otherwise we have a problem // This is an error // we have options // - treat it all as freeform text // - assume an implicit closer (easiest when not nesting) // For the easy case we'll assume an implicit closer. if (1 === stackDepth) { addBlockFromStack(); return false; } // For the nested case where it's more difficult we'll // have to assume that multiple closers are missing // and so we'll collapse the whole stack piecewise. while (0 < stack.length) { addBlockFromStack(); } return false; case 'void-block': // easy case is if we stumbled upon a void block // in the top-level of the document. if (0 === stackDepth) { if (null !== leadingHtmlStart) { output.push(Freeform(document.substr(leadingHtmlStart, startOffset - leadingHtmlStart))); } output.push(Block(blockName, attrs, [], '', [])); offset = startOffset + tokenLength; return true; } // Otherwise we found an inner block. addInnerBlock(Block(blockName, attrs, [], '', []), startOffset, tokenLength); offset = startOffset + tokenLength; return true; case 'block-opener': // Track all newly-opened blocks on the stack. stack.push(Frame(Block(blockName, attrs, [], '', []), startOffset, tokenLength, startOffset + tokenLength, leadingHtmlStart)); offset = startOffset + tokenLength; return true; case 'block-closer': // If we're missing an opener we're in trouble // This is an error. if (0 === stackDepth) { // We have options // - assume an implicit opener // - assume _this_ is the opener // - give up and close out the document. addFreeform(); return false; } // If we're not nesting then this is easy - close the block. if (1 === stackDepth) { addBlockFromStack(startOffset); offset = startOffset + tokenLength; return true; } // Otherwise we're nested and we have to close out the current // block and add it as a innerBlock to the parent. const stackTop = /* @type {ParsedFrame} /stack.pop(); const html = document.substr(stackTop.prevOffset, startOffset - stackTop.prevOffset); stackTop.block.innerHTML += html; stackTop.block.innerContent.push(html); stackTop.prevOffset = startOffset + tokenLength; addInnerBlock(stackTop.block, stackTop.tokenStart, stackTop.tokenLength, startOffset + tokenLength); offset = startOffset + tokenLength; return true; default: // This is an error. addFreeform(); return false; } } /* * Parse JSON if valid, otherwise return null * * Note that JSON coming from the block comment * delimiters is constrained to be an object * and cannot be things like `true` or `null` * * @param {string} input JSON input string to parse * @return {Object\|null} parsed JSON if valid / function parseJSON(input) { try { return JSON.parse(input); } catch (e) { return null; } } /* * Finds the next token in the document. * * @return {Token} The next matched token. / function nextToken() { // Aye the magic // we're using a single RegExp to tokenize the block comment delimiters // we're also using a trick here because the only difference between a // block opener and a block closer is the leading `/` before `wp:` (and // a closer has no attributes). we can trap them both and process the // match back in JavaScript to see which one it was. const matches = tokenizer.exec(document); // We have no more tokens. if (null === matches) { return ['no-more-tokens', '', null, 0, 0]; } const startedAt = matches.index; const [match, closerMatch, namespaceMatch, nameMatch, attrsMatch / Internal/unused. /,, voidMatch] = matches; const length = match.length; const isCloser = !!closerMatch; const isVoid = !!voidMatch; const namespace = namespaceMatch \|\| 'core/'; const name = namespace + nameMatch; const hasAttrs = !!attrsMatch; const attrs = hasAttrs ? parseJSON(attrsMatch) : {}; // This state isn't allowed // This is an error. if (isCloser && (isVoid \|\| hasAttrs)) { // We can ignore them since they don't hurt anything // we may warn against this at some point or reject it. } if (isVoid) { return ['void-block', name, attrs, startedAt, length]; } if (isCloser) { return ['block-closer', name, null, startedAt, length]; } return ['block-opener', name, attrs, startedAt, length]; } /* * Adds a freeform block to the output. * * @param {number} [rawLength] / function addFreeform(rawLength) { const length = rawLength ? rawLength : document.length - offset; if (0 === length) { return; } output.push(Freeform(document.substr(offset, length))); } /* * Adds inner block to the parent block. * * @param {ParsedBlock} block * @param {number} tokenStart * @param {number} tokenLength * @param {number} [lastOffset] / function addInnerBlock(block, tokenStart, tokenLength, lastOffset) { const parent = stack[stack.length - 1]; parent.block.innerBlocks.push(block); const html = document.substr(parent.prevOffset, tokenStart - parent.prevOffset); if (html) { parent.block.innerHTML += html; parent.block.innerContent.push(html); } parent.block.innerContent.push(null); parent.prevOffset = lastOffset ? lastOffset : tokenStart + tokenLength; } /* * Adds block from the stack to the output. * * @param {number} [endOffset] / function addBlockFromStack(endOffset) { const { block, leadingHtmlStart, prevOffset, tokenStart } = /* @type {ParsedFrame} /stack.pop(); const html = endOffset ? document.substr(prevOffset, endOffset - prevOffset) : document.substr(prevOffset); if (html) { block.innerHTML += html; block.innerContent.push(html); } if (null !== leadingHtmlStart) { output.push(Freeform(document.substr(leadingHtmlStart, tokenStart - leadingHtmlStart))); } output.push(block); } (window.wp = window.wp \|\| {}).blockSerializationDefaultParser = __webpack_exports__; /*****/ })() ; Back

Edit File : block-serialization-default-parser.js | Size : 14.87 KB

/******/ (() => { // webpackBootstrap
/******/ 	"use strict";
/******/ 	// The require scope
/******/ 	var __webpack_require__ = {};
/******/ 	
/************************************************************************/
/******/ 	/* webpack/runtime/define property getters */
/******/ 	(() => {
/******/ 		// define getter functions for harmony exports
/******/ 		__webpack_require__.d = (exports, definition) => {
/******/ 			for(var key in definition) {
/******/ 				if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
/******/ 					Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ 				}
/******/ 			}
/******/ 		};
/******/ 	})();
/******/ 	
/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
/******/ 	(() => {
/******/ 		__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
/******/ 	})();
/******/ 	
/******/ 	/* webpack/runtime/make namespace object */
/******/ 	(() => {
/******/ 		// define __esModule on exports
/******/ 		__webpack_require__.r = (exports) => {
/******/ 			if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ 				Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ 			}
/******/ 			Object.defineProperty(exports, '__esModule', { value: true });
/******/ 		};
/******/ 	})();
/******/ 	
/************************************************************************/
var __webpack_exports__ = {};
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   parse: () => (/* binding */ parse)
/* harmony export */ });
/**
 * @type {string}
 */
let document;
/**
 * @type {number}
 */
let offset;
/**
 * @type {ParsedBlock[]}
 */
let output;
/**
 * @type {ParsedFrame[]}
 */
let stack;

/**
 * @typedef {Object|null} Attributes
 */

/**
 * @typedef {Object} ParsedBlock
 * @property {string|null}        blockName    Block name.
 * @property {Attributes}         attrs        Block attributes.
 * @property {ParsedBlock[]}      innerBlocks  Inner blocks.
 * @property {string}             innerHTML    Inner HTML.
 * @property {Array<string|null>} innerContent Inner content.
 */

/**
 * @typedef {Object} ParsedFrame
 * @property {ParsedBlock} block            Block.
 * @property {number}      tokenStart       Token start.
 * @property {number}      tokenLength      Token length.
 * @property {number}      prevOffset       Previous offset.
 * @property {number|null} leadingHtmlStart Leading HTML start.
 */

/**
 * @typedef {'no-more-tokens'|'void-block'|'block-opener'|'block-closer'} TokenType
 */

/**
 * @typedef {[TokenType, string, Attributes, number, number]} Token
 */

/**
 * Matches block comment delimiters
 *
 * While most of this pattern is straightforward the attribute parsing
 * incorporates a tricks to make sure we don't choke on specific input
 *
 *  - since JavaScript has no possessive quantifier or atomic grouping
 *    we are emulating it with a trick
 *
 *    we want a possessive quantifier or atomic group to prevent backtracking
 *    on the `}`s should we fail to match the remainder of the pattern
 *
 *    we can emulate this with a positive lookahead and back reference
 *    (a++)*c === ((?=(a+))\1)*c
 *
 *    let's examine an example:
 *      - /(a+)*c/.test('aaaaaaaaaaaaad') fails after over 49,000 steps
 *      - /(a++)*c/.test('aaaaaaaaaaaaad') fails after 85 steps
 *      - /(?>a+)*c/.test('aaaaaaaaaaaaad') fails after 126 steps
 *
 *    this is because the possessive `++` and the atomic group `(?>)`
 *    tell the engine that all those `a`s belong together as a single group
 *    and so it won't split it up when stepping backwards to try and match
 *
 *    if we use /((?=(a+))\1)*c/ then we get the same behavior as the atomic group
 *    or possessive and prevent the backtracking because the `a+` is matched but
 *    not captured. thus, we find the long string of `a`s and remember it, then
 *    reference it as a whole unit inside our pattern
 *
 *    @see http://instanceof.me/post/52245507631/regex-emulate-atomic-grouping-with-lookahead
 *    @see http://blog.stevenlevithan.com/archives/mimic-atomic-groups
 *    @see https://javascript.info/regexp-infinite-backtracking-problem
 *
 *    once browsers reliably support atomic grouping or possessive
 *    quantifiers natively we should remove this trick and simplify
 *
 * @type {RegExp}
 *
 * @since 3.8.0
 * @since 4.6.1 added optimization to prevent backtracking on attribute parsing
 */
const tokenizer = /)[^])*)\5|[^]*?)}\s+)?(\/)?-->/g;

/**
 * Constructs a block object.
 *
 * @param {string|null}   blockName
 * @param {Attributes}    attrs
 * @param {ParsedBlock[]} innerBlocks
 * @param {string}        innerHTML
 * @param {string[]}      innerContent
 * @return {ParsedBlock} The block object.
 */
function Block(blockName, attrs, innerBlocks, innerHTML, innerContent) {
  return {
    blockName,
    attrs,
    innerBlocks,
    innerHTML,
    innerContent
  };
}

/**
 * Constructs a freeform block object.
 *
 * @param {string} innerHTML
 * @return {ParsedBlock} The freeform block object.
 */
function Freeform(innerHTML) {
  return Block(null, {}, [], innerHTML, [innerHTML]);
}

/**
 * Constructs a frame object.
 *
 * @param {ParsedBlock} block
 * @param {number}      tokenStart
 * @param {number}      tokenLength
 * @param {number}      prevOffset
 * @param {number|null} leadingHtmlStart
 * @return {ParsedFrame} The frame object.
 */
function Frame(block, tokenStart, tokenLength, prevOffset, leadingHtmlStart) {
  return {
    block,
    tokenStart,
    tokenLength,
    prevOffset: prevOffset || tokenStart + tokenLength,
    leadingHtmlStart
  };
}

/**
 * Parser function, that converts input HTML into a block based structure.
 *
 * @param {string} doc The HTML document to parse.
 *
 * @example
 * Input post:
 * ```html
 * 
 * <div class="wp-block-columns has-3-columns">
 * <div class="wp-block-column">
 * <p>Left</p>
 * </div>
 * 
 *
 * 
 * <div class="wp-block-column">
 * <p><strong>Middle</strong></p>
 * </div>
 * 
 *
 * 
 * <div class="wp-block-column"></div>
 * </div>
 * 
 * ```
 *
 * Parsing code:
 * ```js
 * import { parse } from '@wordpress/block-serialization-default-parser';
 *
 * parse( post ) === [
 *     {
 *         blockName: "core/columns",
 *         attrs: {
 *             columns: 3
 *         },
 *         innerBlocks: [
 *             {
 *                 blockName: "core/column",
 *                 attrs: null,
 *                 innerBlocks: [
 *                     {
 *                         blockName: "core/paragraph",
 *                         attrs: null,
 *                         innerBlocks: [],
 *                         innerHTML: "\n<p>Left</p>\n"
 *                     }
 *                 ],
 *                 innerHTML: '\n<div class="wp-block-column"></div>\n'
 *             },
 *             {
 *                 blockName: "core/column",
 *                 attrs: null,
 *                 innerBlocks: [
 *                     {
 *                         blockName: "core/paragraph",
 *                         attrs: null,
 *                         innerBlocks: [],
 *                         innerHTML: "\n<p><strong>Middle</strong></p>\n"
 *                     }
 *                 ],
 *                 innerHTML: '\n<div class="wp-block-column"></div>\n'
 *             },
 *             {
 *                 blockName: "core/column",
 *                 attrs: null,
 *                 innerBlocks: [],
 *                 innerHTML: '\n<div class="wp-block-column"></div>\n'
 *             }
 *         ],
 *         innerHTML: '\n<div class="wp-block-columns has-3-columns">\n\n\n\n</div>\n'
 *     }
 * ];
 * ```
 * @return {ParsedBlock[]} A block-based representation of the input HTML.
 */
const parse = doc => {
  document = doc;
  offset = 0;
  output = [];
  stack = [];
  tokenizer.lastIndex = 0;
  do {
    // twiddle our thumbs
  } while (proceed());
  return output;
};

/**
 * Parses the next token in the input document.
 *
 * @return {boolean} Returns true when there is more tokens to parse.
 */
function proceed() {
  const stackDepth = stack.length;
  const next = nextToken();
  const [tokenType, blockName, attrs, startOffset, tokenLength] = next;

// We may have some HTML soup before the next block.
  const leadingHtmlStart = startOffset > offset ? offset : null;
  switch (tokenType) {
    case 'no-more-tokens':
      // If not in a block then flush output.
      if (0 === stackDepth) {
        addFreeform();
        return false;
      }

// Otherwise we have a problem
      // This is an error
      // we have options
      //  - treat it all as freeform text
      //  - assume an implicit closer (easiest when not nesting)

// For the easy case we'll assume an implicit closer.
      if (1 === stackDepth) {
        addBlockFromStack();
        return false;
      }

// For the nested case where it's more difficult we'll
      // have to assume that multiple closers are missing
      // and so we'll collapse the whole stack piecewise.
      while (0 < stack.length) {
        addBlockFromStack();
      }
      return false;
    case 'void-block':
      // easy case is if we stumbled upon a void block
      // in the top-level of the document.
      if (0 === stackDepth) {
        if (null !== leadingHtmlStart) {
          output.push(Freeform(document.substr(leadingHtmlStart, startOffset - leadingHtmlStart)));
        }
        output.push(Block(blockName, attrs, [], '', []));
        offset = startOffset + tokenLength;
        return true;
      }

// Otherwise we found an inner block.
      addInnerBlock(Block(blockName, attrs, [], '', []), startOffset, tokenLength);
      offset = startOffset + tokenLength;
      return true;
    case 'block-opener':
      // Track all newly-opened blocks on the stack.
      stack.push(Frame(Block(blockName, attrs, [], '', []), startOffset, tokenLength, startOffset + tokenLength, leadingHtmlStart));
      offset = startOffset + tokenLength;
      return true;
    case 'block-closer':
      // If we're missing an opener we're in trouble
      // This is an error.
      if (0 === stackDepth) {
        // We have options
        //  - assume an implicit opener
        //  - assume _this_ is the opener
        // - give up and close out the document.
        addFreeform();
        return false;
      }

// If we're not nesting then this is easy - close the block.
      if (1 === stackDepth) {
        addBlockFromStack(startOffset);
        offset = startOffset + tokenLength;
        return true;
      }

// Otherwise we're nested and we have to close out the current
      // block and add it as a innerBlock to the parent.
      const stackTop = /** @type {ParsedFrame} */stack.pop();
      const html = document.substr(stackTop.prevOffset, startOffset - stackTop.prevOffset);
      stackTop.block.innerHTML += html;
      stackTop.block.innerContent.push(html);
      stackTop.prevOffset = startOffset + tokenLength;
      addInnerBlock(stackTop.block, stackTop.tokenStart, stackTop.tokenLength, startOffset + tokenLength);
      offset = startOffset + tokenLength;
      return true;
    default:
      // This is an error.
      addFreeform();
      return false;
  }
}

/**
 * Parse JSON if valid, otherwise return null
 *
 * Note that JSON coming from the block comment
 * delimiters is constrained to be an object
 * and cannot be things like `true` or `null`
 *
 * @param {string} input JSON input string to parse
 * @return {Object|null} parsed JSON if valid
 */
function parseJSON(input) {
  try {
    return JSON.parse(input);
  } catch (e) {
    return null;
  }
}

/**
 * Finds the next token in the document.
 *
 * @return {Token} The next matched token.
 */
function nextToken() {
  // Aye the magic
  // we're using a single RegExp to tokenize the block comment delimiters
  // we're also using a trick here because the only difference between a
  // block opener and a block closer is the leading `/` before `wp:` (and
  // a closer has no attributes). we can trap them both and process the
  // match back in JavaScript to see which one it was.
  const matches = tokenizer.exec(document);

// We have no more tokens.
  if (null === matches) {
    return ['no-more-tokens', '', null, 0, 0];
  }
  const startedAt = matches.index;
  const [match, closerMatch, namespaceMatch, nameMatch, attrsMatch /* Internal/unused. */,, voidMatch] = matches;
  const length = match.length;
  const isCloser = !!closerMatch;
  const isVoid = !!voidMatch;
  const namespace = namespaceMatch || 'core/';
  const name = namespace + nameMatch;
  const hasAttrs = !!attrsMatch;
  const attrs = hasAttrs ? parseJSON(attrsMatch) : {};

// This state isn't allowed
  // This is an error.
  if (isCloser && (isVoid || hasAttrs)) {
    // We can ignore them since they don't hurt anything
    // we may warn against this at some point or reject it.
  }
  if (isVoid) {
    return ['void-block', name, attrs, startedAt, length];
  }
  if (isCloser) {
    return ['block-closer', name, null, startedAt, length];
  }
  return ['block-opener', name, attrs, startedAt, length];
}

/**
 * Adds a freeform block to the output.
 *
 * @param {number} [rawLength]
 */
function addFreeform(rawLength) {
  const length = rawLength ? rawLength : document.length - offset;
  if (0 === length) {
    return;
  }
  output.push(Freeform(document.substr(offset, length)));
}

/**
 * Adds inner block to the parent block.
 *
 * @param {ParsedBlock} block
 * @param {number}      tokenStart
 * @param {number}      tokenLength
 * @param {number}      [lastOffset]
 */
function addInnerBlock(block, tokenStart, tokenLength, lastOffset) {
  const parent = stack[stack.length - 1];
  parent.block.innerBlocks.push(block);
  const html = document.substr(parent.prevOffset, tokenStart - parent.prevOffset);
  if (html) {
    parent.block.innerHTML += html;
    parent.block.innerContent.push(html);
  }
  parent.block.innerContent.push(null);
  parent.prevOffset = lastOffset ? lastOffset : tokenStart + tokenLength;
}

/**
 * Adds block from the stack to the output.
 *
 * @param {number} [endOffset]
 */
function addBlockFromStack(endOffset) {
  const {
    block,
    leadingHtmlStart,
    prevOffset,
    tokenStart
  } = /** @type {ParsedFrame} */stack.pop();
  const html = endOffset ? document.substr(prevOffset, endOffset - prevOffset) : document.substr(prevOffset);
  if (html) {
    block.innerHTML += html;
    block.innerContent.push(html);
  }
  if (null !== leadingHtmlStart) {
    output.push(Freeform(document.substr(leadingHtmlStart, tokenStart - leadingHtmlStart)));
  }
  output.push(block);
}

(window.wp = window.wp || {}).blockSerializationDefaultParser = __webpack_exports__;
/******/ })()
;

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