| 1 | 'use strict';
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| 2 |
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| 3 | function resolveProps(tokens, { flow, indicator, next, offset, onError, startOnNewline }) {
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| 4 | let spaceBefore = false;
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| 5 | let atNewline = startOnNewline;
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| 6 | let hasSpace = startOnNewline;
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| 7 | let comment = '';
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| 8 | let commentSep = '';
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| 9 | let hasNewline = false;
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| 10 | let hasNewlineAfterProp = false;
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| 11 | let reqSpace = false;
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| 12 | let anchor = null;
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| 13 | let tag = null;
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| 14 | let comma = null;
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| 15 | let found = null;
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| 16 | let start = null;
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| 17 | for (const token of tokens) {
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| 18 | if (reqSpace) {
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| 19 | if (token.type !== 'space' &&
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| 20 | token.type !== 'newline' &&
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| 21 | token.type !== 'comma')
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| 22 | onError(token.offset, 'MISSING_CHAR', 'Tags and anchors must be separated from the next token by white space');
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| 23 | reqSpace = false;
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| 24 | }
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| 25 | switch (token.type) {
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| 26 | case 'space':
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| 27 | // At the doc level, tabs at line start may be parsed
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| 28 | // as leading white space rather than indentation.
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| 29 | // In a flow collection, only the parser handles indent.
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| 30 | if (!flow &&
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| 31 | atNewline &&
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| 32 | indicator !== 'doc-start' &&
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| 33 | token.source[0] === '\t')
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| 34 | onError(token, 'TAB_AS_INDENT', 'Tabs are not allowed as indentation');
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| 35 | hasSpace = true;
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| 36 | break;
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| 37 | case 'comment': {
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| 38 | if (!hasSpace)
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| 39 | onError(token, 'MISSING_CHAR', 'Comments must be separated from other tokens by white space characters');
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| 40 | const cb = token.source.substring(1) || ' ';
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| 41 | if (!comment)
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| 42 | comment = cb;
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| 43 | else
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| 44 | comment += commentSep + cb;
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| 45 | commentSep = '';
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| 46 | atNewline = false;
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| 47 | break;
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| 48 | }
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| 49 | case 'newline':
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| 50 | if (atNewline) {
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| 51 | if (comment)
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| 52 | comment += token.source;
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| 53 | else
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| 54 | spaceBefore = true;
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| 55 | }
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| 56 | else
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| 57 | commentSep += token.source;
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| 58 | atNewline = true;
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| 59 | hasNewline = true;
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| 60 | if (anchor || tag)
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| 61 | hasNewlineAfterProp = true;
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| 62 | hasSpace = true;
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| 63 | break;
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| 64 | case 'anchor':
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| 65 | if (anchor)
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| 66 | onError(token, 'MULTIPLE_ANCHORS', 'A node can have at most one anchor');
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| 67 | if (token.source.endsWith(':'))
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| 68 | onError(token.offset + token.source.length - 1, 'BAD_ALIAS', 'Anchor ending in : is ambiguous', true);
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| 69 | anchor = token;
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| 70 | if (start === null)
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| 71 | start = token.offset;
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| 72 | atNewline = false;
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| 73 | hasSpace = false;
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| 74 | reqSpace = true;
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| 75 | break;
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| 76 | case 'tag': {
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| 77 | if (tag)
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| 78 | onError(token, 'MULTIPLE_TAGS', 'A node can have at most one tag');
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| 79 | tag = token;
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| 80 | if (start === null)
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| 81 | start = token.offset;
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| 82 | atNewline = false;
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| 83 | hasSpace = false;
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| 84 | reqSpace = true;
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| 85 | break;
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| 86 | }
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| 87 | case indicator:
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| 88 | // Could here handle preceding comments differently
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| 89 | if (anchor || tag)
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| 90 | onError(token, 'BAD_PROP_ORDER', `Anchors and tags must be after the ${token.source} indicator`);
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| 91 | if (found)
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| 92 | onError(token, 'UNEXPECTED_TOKEN', `Unexpected ${token.source} in ${flow ?? 'collection'}`);
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| 93 | found = token;
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| 94 | atNewline = false;
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| 95 | hasSpace = false;
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| 96 | break;
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| 97 | case 'comma':
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| 98 | if (flow) {
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| 99 | if (comma)
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| 100 | onError(token, 'UNEXPECTED_TOKEN', `Unexpected , in ${flow}`);
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| 101 | comma = token;
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| 102 | atNewline = false;
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| 103 | hasSpace = false;
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| 104 | break;
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| 105 | }
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| 106 | // else fallthrough
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| 107 | default:
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| 108 | onError(token, 'UNEXPECTED_TOKEN', `Unexpected ${token.type} token`);
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| 109 | atNewline = false;
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| 110 | hasSpace = false;
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| 111 | }
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| 112 | }
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| 113 | const last = tokens[tokens.length - 1];
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| 114 | const end = last ? last.offset + last.source.length : offset;
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| 115 | if (reqSpace &&
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| 116 | next &&
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| 117 | next.type !== 'space' &&
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| 118 | next.type !== 'newline' &&
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| 119 | next.type !== 'comma' &&
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| 120 | (next.type !== 'scalar' || next.source !== ''))
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| 121 | onError(next.offset, 'MISSING_CHAR', 'Tags and anchors must be separated from the next token by white space');
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| 122 | return {
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| 123 | comma,
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| 124 | found,
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| 125 | spaceBefore,
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| 126 | comment,
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| 127 | hasNewline,
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| 128 | hasNewlineAfterProp,
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| 129 | anchor,
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| 130 | tag,
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| 131 | end,
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| 132 | start: start ?? end
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| 133 | };
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| 134 | }
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| 135 |
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| 136 | exports.resolveProps = resolveProps;
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