| 1 | // https://unicode-org.github.io/icu/userguide/format_parse/messages/
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| 2 | // https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/text/MessageFormat.html
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| 3 |
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| 4 | (function (Prism) {
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| 5 |
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| 6 | /**
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| 7 | * @param {string} source
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| 8 | * @param {number} level
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| 9 | * @returns {string}
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| 10 | */
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| 11 | function nested(source, level) {
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| 12 | if (level <= 0) {
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| 13 | return /[]/.source;
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| 14 | } else {
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| 15 | return source.replace(/<SELF>/g, function () { return nested(source, level - 1); });
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| 16 | }
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| 17 | }
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| 18 |
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| 19 | var stringPattern = /'[{}:=,](?:[^']|'')*'(?!')/;
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| 20 |
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| 21 | var escape = {
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| 22 | pattern: /''/,
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| 23 | greedy: true,
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| 24 | alias: 'operator'
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| 25 | };
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| 26 | var string = {
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| 27 | pattern: stringPattern,
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| 28 | greedy: true,
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| 29 | inside: {
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| 30 | 'escape': escape
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| 31 | }
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| 32 | };
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| 33 |
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| 34 | var argumentSource = nested(
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| 35 | /\{(?:[^{}']|'(?![{},'])|''|<STR>|<SELF>)*\}/.source
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| 36 | .replace(/<STR>/g, function () { return stringPattern.source; }),
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| 37 | 8
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| 38 | );
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| 39 |
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| 40 | var nestedMessage = {
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| 41 | pattern: RegExp(argumentSource),
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| 42 | inside: {
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| 43 | 'message': {
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| 44 | pattern: /^(\{)[\s\S]+(?=\}$)/,
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| 45 | lookbehind: true,
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| 46 | inside: null // see below
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| 47 | },
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| 48 | 'message-delimiter': {
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| 49 | pattern: /./,
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| 50 | alias: 'punctuation'
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| 51 | }
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| 52 | }
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| 53 | };
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| 54 |
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| 55 | Prism.languages['icu-message-format'] = {
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| 56 | 'argument': {
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| 57 | pattern: RegExp(argumentSource),
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| 58 | greedy: true,
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| 59 | inside: {
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| 60 | 'content': {
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| 61 | pattern: /^(\{)[\s\S]+(?=\}$)/,
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| 62 | lookbehind: true,
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| 63 | inside: {
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| 64 | 'argument-name': {
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| 65 | pattern: /^(\s*)[^{}:=,\s]+/,
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| 66 | lookbehind: true
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| 67 | },
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| 68 | 'choice-style': {
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| 69 | // https://unicode-org.github.io/icu-docs/apidoc/released/icu4c/classicu_1_1ChoiceFormat.html#details
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| 70 | pattern: /^(\s*,\s*choice\s*,\s*)\S(?:[\s\S]*\S)?/,
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| 71 | lookbehind: true,
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| 72 | inside: {
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| 73 | 'punctuation': /\|/,
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| 74 | 'range': {
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| 75 | pattern: /^(\s*)[+-]?(?:\d+(?:\.\d*)?|\u221e)\s*[<#\u2264]/,
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| 76 | lookbehind: true,
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| 77 | inside: {
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| 78 | 'operator': /[<#\u2264]/,
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| 79 | 'number': /\S+/
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| 80 | }
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| 81 | },
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| 82 | rest: null // see below
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| 83 | }
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| 84 | },
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| 85 | 'plural-style': {
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| 86 | // 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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| 87 | pattern: /^(\s*,\s*(?:plural|selectordinal)\s*,\s*)\S(?:[\s\S]*\S)?/,
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| 88 | lookbehind: true,
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| 89 | inside: {
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| 90 | 'offset': /^offset:\s*\d+/,
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| 91 | 'nested-message': nestedMessage,
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| 92 | 'selector': {
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| 93 | pattern: /=\d+|[^{}:=,\s]+/,
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| 94 | inside: {
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| 95 | 'keyword': /^(?:few|many|one|other|two|zero)$/
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| 96 | }
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| 97 | }
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| 98 | }
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| 99 | },
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| 100 | 'select-style': {
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| 101 | // https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/text/SelectFormat.html#:~:text=Patterns%20and%20Their%20Interpretation
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| 102 | pattern: /^(\s*,\s*select\s*,\s*)\S(?:[\s\S]*\S)?/,
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| 103 | lookbehind: true,
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| 104 | inside: {
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| 105 | 'nested-message': nestedMessage,
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| 106 | 'selector': {
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| 107 | pattern: /[^{}:=,\s]+/,
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| 108 | inside: {
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| 109 | 'keyword': /^other$/
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| 110 | }
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| 111 | }
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| 112 | }
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| 113 | },
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| 114 | 'keyword': /\b(?:choice|plural|select|selectordinal)\b/,
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| 115 | 'arg-type': {
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| 116 | pattern: /\b(?:date|duration|number|ordinal|spellout|time)\b/,
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| 117 | alias: 'keyword'
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| 118 | },
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| 119 | 'arg-skeleton': {
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| 120 | pattern: /(,\s*)::[^{}:=,\s]+/,
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| 121 | lookbehind: true
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| 122 | },
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| 123 | 'arg-style': {
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| 124 | pattern: /(,\s*)(?:currency|full|integer|long|medium|percent|short)(?=\s*$)/,
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| 125 | lookbehind: true
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| 126 | },
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| 127 | 'arg-style-text': {
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| 128 | pattern: RegExp(/(^\s*,\s*(?=\S))/.source + nested(/(?:[^{}']|'[^']*'|\{(?:<SELF>)?\})+/.source, 8) + '$'),
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| 129 | lookbehind: true,
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| 130 | alias: 'string'
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| 131 | },
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| 132 | 'punctuation': /,/
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| 133 | }
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| 134 | },
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| 135 | 'argument-delimiter': {
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| 136 | pattern: /./,
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| 137 | alias: 'operator'
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| 138 | }
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| 139 | }
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| 140 | },
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| 141 | 'escape': escape,
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| 142 | 'string': string
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| 143 | };
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| 144 |
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| 145 | nestedMessage.inside.message.inside = Prism.languages['icu-message-format'];
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| 146 | Prism.languages['icu-message-format'].argument.inside.content.inside['choice-style'].inside.rest = Prism.languages['icu-message-format'];
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| 147 |
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| 148 | }(Prism));
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