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to assume that multiple closers are missing\n\t\t\t// and so we'll collapse the whole stack piecewise\n\t\t\twhile ( 0 < stack.length ) {\n\t\t\t\taddBlockFromStack();\n\t\t\t}\n\t\t\treturn false;\n\n\t\tcase 'void-block':\n\t\t\t// easy case is if we stumbled upon a void block\n\t\t\t// in the top-level of the document\n\t\t\tif ( 0 === stackDepth ) {\n\t\t\t\tif ( null !== leadingHtmlStart ) {\n\t\t\t\t\toutput.push( Freeform( document.substr( leadingHtmlStart, startOffset - leadingHtmlStart ) ) );\n\t\t\t\t}\n\t\t\t\toutput.push( Block( blockName, attrs, [], '', [] ) );\n\t\t\t\toffset = startOffset + tokenLength;\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// otherwise we found an inner block\n\t\t\taddInnerBlock(\n\t\t\t\tBlock( blockName, attrs, [], '', [] ),\n\t\t\t\tstartOffset,\n\t\t\t\ttokenLength,\n\t\t\t);\n\t\t\toffset = startOffset + tokenLength;\n\t\t\treturn true;\n\n\t\tcase 'block-opener':\n\t\t\t// track all newly-opened blocks on the stack\n\t\t\tstack.push(\n\t\t\t\tFrame(\n\t\t\t\t\tBlock( blockName, attrs, [], '', [] ),\n\t\t\t\t\tstartOffset,\n\t\t\t\t\ttokenLength,\n\t\t\t\t\tstartOffset + tokenLength,\n\t\t\t\t\tleadingHtmlStart,\n\t\t\t\t),\n\t\t\t);\n\t\t\toffset = startOffset + tokenLength;\n\t\t\treturn true;\n\n\t\tcase 'block-closer':\n\t\t\t// if we're missing an opener we're in trouble\n\t\t\t// This is an error\n\t\t\tif ( 0 === stackDepth ) {\n\t\t\t\t// we have options\n\t\t\t\t//  - assume an implicit opener\n\t\t\t\t//  - assume _this_ is the opener\n\t\t\t\t//  - give up and close out the document\n\t\t\t\taddFreeform();\n\t\t\t\treturn false;\n\t\t\t}\n\n\t\t\t// if we're not nesting then this is easy - close the block\n\t\t\tif ( 1 === stackDepth ) {\n\t\t\t\taddBlockFromStack( startOffset );\n\t\t\t\toffset = startOffset + tokenLength;\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// otherwise we're nested and we have to close out the current\n\t\t\t// block and add it as a innerBlock to the parent\n\t\t\tconst stackTop = stack.pop();\n\t\t\tconst html = document.substr( stackTop.prevOffset, startOffset - stackTop.prevOffset );\n\t\t\tstackTop.block.innerHTML += html;\n\t\t\tstackTop.block.innerContent.push( html );\n\t\t\tstackTop.prevOffset = startOffset + tokenLength;\n\n\t\t\taddInnerBlock(\n\t\t\t\tstackTop.block,\n\t\t\t\tstackTop.tokenStart,\n\t\t\t\tstackTop.tokenLength,\n\t\t\t\tstartOffset + tokenLength,\n\t\t\t);\n\t\t\toffset = startOffset + tokenLength;\n\t\t\treturn true;\n\n\t\tdefault:\n\t\t\t// This is an error\n\t\t\taddFreeform();\n\t\t\treturn false;\n\t}\n}\n\n/**\n * Parse JSON if valid, otherwise return null\n *\n * Note that JSON coming from the block comment\n * delimiters is constrained to be an object\n * and cannot be things like `true` or `null`\n *\n * @param {string} input JSON input string to parse\n * @return {Object|null} parsed JSON if valid\n */\nfunction parseJSON( input ) {\n\ttry {\n\t\treturn JSON.parse( input );\n\t} catch ( e ) {\n\t\treturn null;\n\t}\n}\n\nfunction nextToken() {\n\t// aye the magic\n\t// we're using a single RegExp to tokenize the block comment delimiters\n\t// we're also using a trick here because the only difference between a\n\t// block opener and a block closer is the leading `/` before `wp:` (and\n\t// a closer has no attributes). we can trap them both and process the\n\t// match back in Javascript to see which one it was.\n\tconst matches = tokenizer.exec( document );\n\n\t// we have no more tokens\n\tif ( null === matches ) {\n\t\treturn [ 'no-more-tokens' ];\n\t}\n\n\tconst startedAt = matches.index;\n\tconst [ match, closerMatch, namespaceMatch, nameMatch, attrsMatch, voidMatch ] = matches;\n\n\tconst length = match.length;\n\tconst isCloser = !! closerMatch;\n\tconst isVoid = !! voidMatch;\n\tconst namespace = namespaceMatch || 'core/';\n\tconst name = namespace + nameMatch;\n\tconst hasAttrs = !! attrsMatch;\n\tconst attrs = hasAttrs ? parseJSON( attrsMatch ) : {};\n\n\t// This state isn't allowed\n\t// This is an error\n\tif ( isCloser && ( isVoid || hasAttrs ) ) {\n\t\t// we can ignore them since they don't hurt anything\n\t\t// we may warn against this at some point or reject it\n\t}\n\n\tif ( isVoid ) {\n\t\treturn [ 'void-block', name, attrs, startedAt, length ];\n\t}\n\n\tif ( isCloser ) {\n\t\treturn [ 'block-closer', name, null, startedAt, length ];\n\t}\n\n\treturn [ 'block-opener', name, attrs, startedAt, length ];\n}\n\nfunction addFreeform( rawLength ) {\n\tconst length = rawLength ? rawLength : document.length - offset;\n\n\tif ( 0 === length ) {\n\t\treturn;\n\t}\n\n\toutput.push( Freeform( document.substr( offset, length ) ) );\n}\n\nfunction addInnerBlock( block, tokenStart, tokenLength, lastOffset ) {\n\tconst parent = stack[ stack.length - 1 ];\n\tparent.block.innerBlocks.push( block );\n\tconst html = document.substr( parent.prevOffset, tokenStart - parent.prevOffset );\n\n\tif ( html ) {\n\t\tparent.block.innerHTML += html;\n\t\tparent.block.innerContent.push( html );\n\t}\n\n\tparent.block.innerContent.push( null );\n\tparent.prevOffset = lastOffset ? lastOffset : tokenStart + tokenLength;\n}\n\nfunction addBlockFromStack( endOffset ) {\n\tconst { block, leadingHtmlStart, prevOffset, tokenStart } = stack.pop();\n\n\tconst html = endOffset ? document.substr( prevOffset, endOffset - prevOffset ) : document.substr( prevOffset );\n\n\tif ( html ) {\n\t\tblock.innerHTML += html;\n\t\tblock.innerContent.push( html );\n\t}\n\n\tif ( null !== leadingHtmlStart ) {\n\t\toutput.push( Freeform( document.substr( leadingHtmlStart, tokenStart - leadingHtmlStart ) ) );\n\t}\n\n\toutput.push( block );\n}\n"],"sourceRoot":""}