149 lines
3.9 KiB
JavaScript
149 lines
3.9 KiB
JavaScript
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// https://unicode-org.github.io/icu/userguide/format_parse/messages/
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// https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/text/MessageFormat.html
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(function (Prism) {
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/**
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* @param {string} source
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* @param {number} level
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* @returns {string}
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*/
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function nested(source, level) {
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if (level <= 0) {
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return /[]/.source;
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} else {
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return source.replace(/<SELF>/g, function () { return nested(source, level - 1); });
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}
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}
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var stringPattern = /'[{}:=,](?:[^']|'')*'(?!')/;
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var escape = {
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pattern: /''/,
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greedy: true,
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alias: 'operator'
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};
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var string = {
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pattern: stringPattern,
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greedy: true,
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inside: {
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'escape': escape
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}
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};
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var argumentSource = nested(
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/\{(?:[^{}']|'(?![{},'])|''|<STR>|<SELF>)*\}/.source
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.replace(/<STR>/g, function () { return stringPattern.source; }),
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8
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);
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var nestedMessage = {
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pattern: RegExp(argumentSource),
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inside: {
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'message': {
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pattern: /^(\{)[\s\S]+(?=\}$)/,
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lookbehind: true,
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inside: null // see below
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},
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'message-delimiter': {
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pattern: /./,
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alias: 'punctuation'
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}
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}
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};
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Prism.languages['icu-message-format'] = {
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'argument': {
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pattern: RegExp(argumentSource),
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greedy: true,
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inside: {
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'content': {
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pattern: /^(\{)[\s\S]+(?=\}$)/,
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lookbehind: true,
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inside: {
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'argument-name': {
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pattern: /^(\s*)[^{}:=,\s]+/,
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lookbehind: true
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},
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'choice-style': {
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// https://unicode-org.github.io/icu-docs/apidoc/released/icu4c/classicu_1_1ChoiceFormat.html#details
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pattern: /^(\s*,\s*choice\s*,\s*)\S(?:[\s\S]*\S)?/,
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lookbehind: true,
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inside: {
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'punctuation': /\|/,
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'range': {
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pattern: /^(\s*)[+-]?(?:\d+(?:\.\d*)?|\u221e)\s*[<#\u2264]/,
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lookbehind: true,
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inside: {
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'operator': /[<#\u2264]/,
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'number': /\S+/
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}
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},
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rest: null // see below
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}
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},
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'plural-style': {
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// https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/text/PluralFormat.html#:~:text=Patterns%20and%20Their%20Interpretation
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pattern: /^(\s*,\s*(?:plural|selectordinal)\s*,\s*)\S(?:[\s\S]*\S)?/,
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lookbehind: true,
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inside: {
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'offset': /^offset:\s*\d+/,
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'nested-message': nestedMessage,
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'selector': {
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pattern: /=\d+|[^{}:=,\s]+/,
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inside: {
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'keyword': /^(?:few|many|one|other|two|zero)$/
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}
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}
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}
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},
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'select-style': {
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// https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/text/SelectFormat.html#:~:text=Patterns%20and%20Their%20Interpretation
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pattern: /^(\s*,\s*select\s*,\s*)\S(?:[\s\S]*\S)?/,
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lookbehind: true,
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inside: {
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'nested-message': nestedMessage,
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'selector': {
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pattern: /[^{}:=,\s]+/,
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inside: {
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'keyword': /^other$/
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}
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}
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}
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},
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'keyword': /\b(?:choice|plural|select|selectordinal)\b/,
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'arg-type': {
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pattern: /\b(?:date|duration|number|ordinal|spellout|time)\b/,
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alias: 'keyword'
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},
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'arg-skeleton': {
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pattern: /(,\s*)::[^{}:=,\s]+/,
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lookbehind: true
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},
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'arg-style': {
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pattern: /(,\s*)(?:currency|full|integer|long|medium|percent|short)(?=\s*$)/,
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lookbehind: true
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},
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'arg-style-text': {
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pattern: RegExp(/(^\s*,\s*(?=\S))/.source + nested(/(?:[^{}']|'[^']*'|\{(?:<SELF>)?\})+/.source, 8) + '$'),
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lookbehind: true,
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alias: 'string'
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},
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'punctuation': /,/
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}
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},
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'argument-delimiter': {
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pattern: /./,
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alias: 'operator'
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}
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}
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},
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'escape': escape,
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'string': string
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};
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nestedMessage.inside.message.inside = Prism.languages['icu-message-format'];
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Prism.languages['icu-message-format'].argument.inside.content.inside['choice-style'].inside.rest = Prism.languages['icu-message-format'];
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}(Prism));
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