147 lines
		
	
	
		
			5.4 KiB
		
	
	
	
		
			JavaScript
		
	
	
		
			Executable File
		
	
	
	
	
			
		
		
	
	
			147 lines
		
	
	
		
			5.4 KiB
		
	
	
	
		
			JavaScript
		
	
	
		
			Executable File
		
	
	
	
	
| function resolveProps(tokens, { flow, indicator, next, offset, onError, parentIndent, startOnNewline }) {
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|     let spaceBefore = false;
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|     let atNewline = startOnNewline;
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|     let hasSpace = startOnNewline;
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|     let comment = '';
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|     let commentSep = '';
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|     let hasNewline = false;
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|     let reqSpace = false;
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|     let tab = null;
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|     let anchor = null;
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|     let tag = null;
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|     let newlineAfterProp = null;
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|     let comma = null;
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|     let found = null;
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|     let start = null;
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|     for (const token of tokens) {
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|         if (reqSpace) {
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|             if (token.type !== 'space' &&
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|                 token.type !== 'newline' &&
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|                 token.type !== 'comma')
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|                 onError(token.offset, 'MISSING_CHAR', 'Tags and anchors must be separated from the next token by white space');
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|             reqSpace = false;
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|         }
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|         if (tab) {
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|             if (atNewline && token.type !== 'comment' && token.type !== 'newline') {
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|                 onError(tab, 'TAB_AS_INDENT', 'Tabs are not allowed as indentation');
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|             }
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|             tab = null;
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|         }
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|         switch (token.type) {
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|             case 'space':
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|                 // At the doc level, tabs at line start may be parsed
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|                 // as leading white space rather than indentation.
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|                 // In a flow collection, only the parser handles indent.
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|                 if (!flow &&
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|                     (indicator !== 'doc-start' || next?.type !== 'flow-collection') &&
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|                     token.source.includes('\t')) {
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|                     tab = token;
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|                 }
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|                 hasSpace = true;
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|                 break;
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|             case 'comment': {
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|                 if (!hasSpace)
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|                     onError(token, 'MISSING_CHAR', 'Comments must be separated from other tokens by white space characters');
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|                 const cb = token.source.substring(1) || ' ';
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|                 if (!comment)
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|                     comment = cb;
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|                 else
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|                     comment += commentSep + cb;
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|                 commentSep = '';
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|                 atNewline = false;
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|                 break;
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|             }
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|             case 'newline':
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|                 if (atNewline) {
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|                     if (comment)
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|                         comment += token.source;
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|                     else if (!found || indicator !== 'seq-item-ind')
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|                         spaceBefore = true;
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|                 }
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|                 else
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|                     commentSep += token.source;
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|                 atNewline = true;
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|                 hasNewline = true;
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|                 if (anchor || tag)
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|                     newlineAfterProp = token;
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|                 hasSpace = true;
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|                 break;
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|             case 'anchor':
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|                 if (anchor)
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|                     onError(token, 'MULTIPLE_ANCHORS', 'A node can have at most one anchor');
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|                 if (token.source.endsWith(':'))
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|                     onError(token.offset + token.source.length - 1, 'BAD_ALIAS', 'Anchor ending in : is ambiguous', true);
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|                 anchor = token;
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|                 start ?? (start = token.offset);
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|                 atNewline = false;
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|                 hasSpace = false;
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|                 reqSpace = true;
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|                 break;
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|             case 'tag': {
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|                 if (tag)
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|                     onError(token, 'MULTIPLE_TAGS', 'A node can have at most one tag');
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|                 tag = token;
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|                 start ?? (start = token.offset);
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|                 atNewline = false;
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|                 hasSpace = false;
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|                 reqSpace = true;
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|                 break;
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|             }
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|             case indicator:
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|                 // Could here handle preceding comments differently
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|                 if (anchor || tag)
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|                     onError(token, 'BAD_PROP_ORDER', `Anchors and tags must be after the ${token.source} indicator`);
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|                 if (found)
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|                     onError(token, 'UNEXPECTED_TOKEN', `Unexpected ${token.source} in ${flow ?? 'collection'}`);
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|                 found = token;
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|                 atNewline =
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|                     indicator === 'seq-item-ind' || indicator === 'explicit-key-ind';
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|                 hasSpace = false;
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|                 break;
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|             case 'comma':
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|                 if (flow) {
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|                     if (comma)
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|                         onError(token, 'UNEXPECTED_TOKEN', `Unexpected , in ${flow}`);
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|                     comma = token;
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|                     atNewline = false;
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|                     hasSpace = false;
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|                     break;
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|                 }
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|             // else fallthrough
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|             default:
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|                 onError(token, 'UNEXPECTED_TOKEN', `Unexpected ${token.type} token`);
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|                 atNewline = false;
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|                 hasSpace = false;
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|         }
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|     }
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|     const last = tokens[tokens.length - 1];
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|     const end = last ? last.offset + last.source.length : offset;
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|     if (reqSpace &&
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|         next &&
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|         next.type !== 'space' &&
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|         next.type !== 'newline' &&
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|         next.type !== 'comma' &&
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|         (next.type !== 'scalar' || next.source !== '')) {
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|         onError(next.offset, 'MISSING_CHAR', 'Tags and anchors must be separated from the next token by white space');
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|     }
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|     if (tab &&
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|         ((atNewline && tab.indent <= parentIndent) ||
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|             next?.type === 'block-map' ||
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|             next?.type === 'block-seq'))
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|         onError(tab, 'TAB_AS_INDENT', 'Tabs are not allowed as indentation');
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|     return {
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|         comma,
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|         found,
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|         spaceBefore,
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|         comment,
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|         hasNewline,
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|         anchor,
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|         tag,
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|         newlineAfterProp,
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|         end,
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|         start: start ?? end
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|     };
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| }
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| 
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| export { resolveProps };
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