48 lines
2.1 KiB
JavaScript
48 lines
2.1 KiB
JavaScript
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// Regex adapted from https://github.com/Zettlr/Zettlr/blob/develop/source/common/util/extract-citations.ts
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/**
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* Citation detection: The first alternative matches "full" citations surrounded
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* by square brackets, whereas the second one matches in-text citations,
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* optionally with suffixes.
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*
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* * Group 1 matches regular "full" citations
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* * Group 2 matches in-text citations (not surrounded by brackets)
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* * Group 3 matches optional square-brackets suffixes to group 2 matches
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*
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* For more information, see https://pandoc.org/MANUAL.html#extension-citations
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*
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* @var {RegExp}
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*/
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export const citationRE = /(?:\[([^[\]]*@[^[\]]+)\])|(?<=\s|^|(-))(?:@([\p{L}\d_][^\s]*[\p{L}\d_]|\{.+\})(?:\s+\[(.*?)\])?)/u;
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/**
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* I hate everything at this. This can match every single possible variation on
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* whatever the f*** you can possibly do within square brackets according to the
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* documentation. I opted for named groups for these because otherwise I have no
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* idea what I have been doing here.
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*
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* * Group prefix: Contains the prefix, ends with a dash if we should suppress the author
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* * Group citekey: Contains the actual citekey, can be surrounded in curly brackets
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* * Group explicitLocator: Contains an explicit locator statement. If given, we MUST ignore any form of locator in the suffix
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* * Group explicitLocatorInSuffix: Same as above, but not concatenated to the citekey
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* * Group suffix: Contains the suffix, but may start with a locator (if explicitLocator and explicitLocatorInSuffix are not given)
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*
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* @var {RegExp}
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*/
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export const fullCitationRE = /(?<prefix>.+)?(?:@(?<citekey>[\p{L}\d_][^\s{]*[\p{L}\d_]|\{.+\}))(?:\{(?<explicitLocator>.*)\})?(?:,\s+(?:\{(?<explicitLocatorInSuffix>.*)\})?(?<suffix>.*))?/u;
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/**
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* This regular expression matches locator ranges, like the following:
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*
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* * 23-45, and further (here it matches up to, not including the comma)
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* * 45
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* * 15423
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* * 14235-12532
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* * 12-34, 23, 56
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* * 12, 23-14, 23
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* * 12, 54, 12-23
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* * 1, 1-4
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* * 3
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* * NEW NEW NEW: Now also matches Roman numerals as sometimes used in forewords!
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*
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* @var {RegExp}
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*/
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export const locatorRE = /^(?:[\d, -]*\d|[ivxlcdm, -]*[ivxlcdm])/i;
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