368 lines
13 KiB
JavaScript
368 lines
13 KiB
JavaScript
(function (Prism) {
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/**
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* Replaces all placeholders "<<n>>" of given pattern with the n-th replacement (zero based).
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*
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* Note: This is a simple text based replacement. Be careful when using backreferences!
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*
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* @param {string} pattern the given pattern.
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* @param {string[]} replacements a list of replacement which can be inserted into the given pattern.
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* @returns {string} the pattern with all placeholders replaced with their corresponding replacements.
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* @example replace(/a<<0>>a/.source, [/b+/.source]) === /a(?:b+)a/.source
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*/
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function replace(pattern, replacements) {
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return pattern.replace(/<<(\d+)>>/g, function (m, index) {
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return '(?:' + replacements[+index] + ')';
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});
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}
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/**
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* @param {string} pattern
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* @param {string[]} replacements
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* @param {string} [flags]
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* @returns {RegExp}
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*/
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function re(pattern, replacements, flags) {
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return RegExp(replace(pattern, replacements), flags || '');
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}
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/**
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* Creates a nested pattern where all occurrences of the string `<<self>>` are replaced with the pattern itself.
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*
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* @param {string} pattern
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* @param {number} depthLog2
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* @returns {string}
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*/
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function nested(pattern, depthLog2) {
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for (var i = 0; i < depthLog2; i++) {
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pattern = pattern.replace(/<<self>>/g, function () { return '(?:' + pattern + ')'; });
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}
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return pattern.replace(/<<self>>/g, '[^\\s\\S]');
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}
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/
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var keywordKinds = {
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// keywords which represent a return or variable type
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type: 'bool byte char decimal double dynamic float int long object sbyte short string uint ulong ushort var void',
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// keywords which are used to declare a type
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typeDeclaration: 'class enum interface record struct',
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// contextual keywords
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// ("var" and "dynamic" are missing because they are used like types)
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contextual: 'add alias and ascending async await by descending from(?=\\s*(?:\\w|$)) get global group into init(?=\\s*;) join let nameof not notnull on or orderby partial remove select set unmanaged value when where with(?=\\s*{)',
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// all other keywords
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other: 'abstract as base break case catch checked const continue default delegate do else event explicit extern finally fixed for foreach goto if implicit in internal is lock namespace new null operator out override params private protected public readonly ref return sealed sizeof stackalloc static switch this throw try typeof unchecked unsafe using virtual volatile while yield'
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};
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// keywords
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function keywordsToPattern(words) {
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return '\\b(?:' + words.trim().replace(/ /g, '|') + ')\\b';
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}
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var typeDeclarationKeywords = keywordsToPattern(keywordKinds.typeDeclaration);
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var keywords = RegExp(keywordsToPattern(keywordKinds.type + ' ' + keywordKinds.typeDeclaration + ' ' + keywordKinds.contextual + ' ' + keywordKinds.other));
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var nonTypeKeywords = keywordsToPattern(keywordKinds.typeDeclaration + ' ' + keywordKinds.contextual + ' ' + keywordKinds.other);
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var nonContextualKeywords = keywordsToPattern(keywordKinds.type + ' ' + keywordKinds.typeDeclaration + ' ' + keywordKinds.other);
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// types
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var generic = nested(/<(?:[^<>;=+\-*/%&|^]|<<self>>)*>/.source, 2); // the idea behind the other forbidden characters is to prevent false positives. Same for tupleElement.
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var nestedRound = nested(/\((?:[^()]|<<self>>)*\)/.source, 2);
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var name = /@?\b[A-Za-z_]\w*\b/.source;
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var genericName = replace(/<<0>>(?:\s*<<1>>)?/.source, [name, generic]);
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var identifier = replace(/(?!<<0>>)<<1>>(?:\s*\.\s*<<1>>)*/.source, [nonTypeKeywords, genericName]);
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var array = /\[\s*(?:,\s*)*\]/.source;
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var typeExpressionWithoutTuple = replace(/<<0>>(?:\s*(?:\?\s*)?<<1>>)*(?:\s*\?)?/.source, [identifier, array]);
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var tupleElement = replace(/[^,()<>[\];=+\-*/%&|^]|<<0>>|<<1>>|<<2>>/.source, [generic, nestedRound, array]);
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var tuple = replace(/\(<<0>>+(?:,<<0>>+)+\)/.source, [tupleElement]);
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var typeExpression = replace(/(?:<<0>>|<<1>>)(?:\s*(?:\?\s*)?<<2>>)*(?:\s*\?)?/.source, [tuple, identifier, array]);
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var typeInside = {
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'keyword': keywords,
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'punctuation': /[<>()?,.:[\]]/
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};
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// strings & characters
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure#character-literals
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure#string-literals
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var character = /'(?:[^\r\n'\\]|\\.|\\[Uux][\da-fA-F]{1,8})'/.source; // simplified pattern
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var regularString = /"(?:\\.|[^\\"\r\n])*"/.source;
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var verbatimString = /@"(?:""|\\[\s\S]|[^\\"])*"(?!")/.source;
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Prism.languages.csharp = Prism.languages.extend('clike', {
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'string': [
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{
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pattern: re(/(^|[^$\\])<<0>>/.source, [verbatimString]),
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lookbehind: true,
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greedy: true
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},
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{
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pattern: re(/(^|[^@$\\])<<0>>/.source, [regularString]),
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lookbehind: true,
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greedy: true
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},
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{
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pattern: RegExp(character),
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greedy: true,
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alias: 'character'
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}
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],
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'class-name': [
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{
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// Using static
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// using static System.Math;
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pattern: re(/(\busing\s+static\s+)<<0>>(?=\s*;)/.source, [identifier]),
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lookbehind: true,
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inside: typeInside
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},
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{
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// Using alias (type)
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// using Project = PC.MyCompany.Project;
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pattern: re(/(\busing\s+<<0>>\s*=\s*)<<1>>(?=\s*;)/.source, [name, typeExpression]),
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lookbehind: true,
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inside: typeInside
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},
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{
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// Using alias (alias)
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// using Project = PC.MyCompany.Project;
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pattern: re(/(\busing\s+)<<0>>(?=\s*=)/.source, [name]),
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lookbehind: true
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},
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{
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// Type declarations
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// class Foo<A, B>
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// interface Foo<out A, B>
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pattern: re(/(\b<<0>>\s+)<<1>>/.source, [typeDeclarationKeywords, genericName]),
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lookbehind: true,
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inside: typeInside
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},
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{
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// Single catch exception declaration
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// catch(Foo)
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// (things like catch(Foo e) is covered by variable declaration)
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pattern: re(/(\bcatch\s*\(\s*)<<0>>/.source, [identifier]),
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lookbehind: true,
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inside: typeInside
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},
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{
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// Name of the type parameter of generic constraints
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// where Foo : class
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pattern: re(/(\bwhere\s+)<<0>>/.source, [name]),
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lookbehind: true
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},
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{
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// Casts and checks via as and is.
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// as Foo<A>, is Bar<B>
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// (things like if(a is Foo b) is covered by variable declaration)
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pattern: re(/(\b(?:is(?:\s+not)?|as)\s+)<<0>>/.source, [typeExpressionWithoutTuple]),
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lookbehind: true,
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inside: typeInside
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},
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{
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// Variable, field and parameter declaration
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// (Foo bar, Bar baz, Foo[,,] bay, Foo<Bar, FooBar<Bar>> bax)
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pattern: re(/\b<<0>>(?=\s+(?!<<1>>|with\s*\{)<<2>>(?:\s*[=,;:{)\]]|\s+(?:in|when)\b))/.source, [typeExpression, nonContextualKeywords, name]),
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inside: typeInside
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}
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],
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'keyword': keywords,
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure#literals
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'number': /(?:\b0(?:x[\da-f_]*[\da-f]|b[01_]*[01])|(?:\B\.\d+(?:_+\d+)*|\b\d+(?:_+\d+)*(?:\.\d+(?:_+\d+)*)?)(?:e[-+]?\d+(?:_+\d+)*)?)(?:[dflmu]|lu|ul)?\b/i,
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'operator': />>=?|<<=?|[-=]>|([-+&|])\1|~|\?\?=?|[-+*/%&|^!=<>]=?/,
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'punctuation': /\?\.?|::|[{}[\];(),.:]/
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});
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Prism.languages.insertBefore('csharp', 'number', {
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'range': {
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pattern: /\.\./,
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alias: 'operator'
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}
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});
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Prism.languages.insertBefore('csharp', 'punctuation', {
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'named-parameter': {
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pattern: re(/([(,]\s*)<<0>>(?=\s*:)/.source, [name]),
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lookbehind: true,
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alias: 'punctuation'
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}
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});
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Prism.languages.insertBefore('csharp', 'class-name', {
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'namespace': {
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// namespace Foo.Bar {}
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// using Foo.Bar;
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pattern: re(/(\b(?:namespace|using)\s+)<<0>>(?:\s*\.\s*<<0>>)*(?=\s*[;{])/.source, [name]),
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lookbehind: true,
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inside: {
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'punctuation': /\./
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}
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},
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'type-expression': {
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// default(Foo), typeof(Foo<Bar>), sizeof(int)
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pattern: re(/(\b(?:default|sizeof|typeof)\s*\(\s*(?!\s))(?:[^()\s]|\s(?!\s)|<<0>>)*(?=\s*\))/.source, [nestedRound]),
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lookbehind: true,
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alias: 'class-name',
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inside: typeInside
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},
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'return-type': {
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// Foo<Bar> ForBar(); Foo IFoo.Bar() => 0
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// int this[int index] => 0; T IReadOnlyList<T>.this[int index] => this[index];
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// int Foo => 0; int Foo { get; set } = 0;
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pattern: re(/<<0>>(?=\s+(?:<<1>>\s*(?:=>|[({]|\.\s*this\s*\[)|this\s*\[))/.source, [typeExpression, identifier]),
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inside: typeInside,
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alias: 'class-name'
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},
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'constructor-invocation': {
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// new List<Foo<Bar[]>> { }
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pattern: re(/(\bnew\s+)<<0>>(?=\s*[[({])/.source, [typeExpression]),
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lookbehind: true,
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inside: typeInside,
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alias: 'class-name'
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},
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/*'explicit-implementation': {
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// int IFoo<Foo>.Bar => 0; void IFoo<Foo<Foo>>.Foo<T>();
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pattern: replace(/\b<<0>>(?=\.<<1>>)/, className, methodOrPropertyDeclaration),
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inside: classNameInside,
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alias: 'class-name'
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},*/
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'generic-method': {
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// foo<Bar>()
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pattern: re(/<<0>>\s*<<1>>(?=\s*\()/.source, [name, generic]),
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inside: {
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'function': re(/^<<0>>/.source, [name]),
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'generic': {
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pattern: RegExp(generic),
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alias: 'class-name',
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inside: typeInside
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}
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}
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},
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'type-list': {
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// The list of types inherited or of generic constraints
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// class Foo<F> : Bar, IList<FooBar>
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// where F : Bar, IList<int>
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pattern: re(
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/\b((?:<<0>>\s+<<1>>|record\s+<<1>>\s*<<5>>|where\s+<<2>>)\s*:\s*)(?:<<3>>|<<4>>|<<1>>\s*<<5>>|<<6>>)(?:\s*,\s*(?:<<3>>|<<4>>|<<6>>))*(?=\s*(?:where|[{;]|=>|$))/.source,
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[typeDeclarationKeywords, genericName, name, typeExpression, keywords.source, nestedRound, /\bnew\s*\(\s*\)/.source]
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),
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lookbehind: true,
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inside: {
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'record-arguments': {
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pattern: re(/(^(?!new\s*\()<<0>>\s*)<<1>>/.source, [genericName, nestedRound]),
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lookbehind: true,
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greedy: true,
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inside: Prism.languages.csharp
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},
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'keyword': keywords,
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'class-name': {
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pattern: RegExp(typeExpression),
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greedy: true,
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inside: typeInside
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},
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'punctuation': /[,()]/
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}
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},
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'preprocessor': {
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pattern: /(^[\t ]*)#.*/m,
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lookbehind: true,
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alias: 'property',
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inside: {
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// highlight preprocessor directives as keywords
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'directive': {
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pattern: /(#)\b(?:define|elif|else|endif|endregion|error|if|line|nullable|pragma|region|undef|warning)\b/,
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lookbehind: true,
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alias: 'keyword'
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}
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}
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}
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});
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// attributes
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var regularStringOrCharacter = regularString + '|' + character;
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var regularStringCharacterOrComment = replace(/\/(?![*/])|\/\/[^\r\n]*[\r\n]|\/\*(?:[^*]|\*(?!\/))*\*\/|<<0>>/.source, [regularStringOrCharacter]);
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var roundExpression = nested(replace(/[^"'/()]|<<0>>|\(<<self>>*\)/.source, [regularStringCharacterOrComment]), 2);
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// https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/attributes/#attribute-targets
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var attrTarget = /\b(?:assembly|event|field|method|module|param|property|return|type)\b/.source;
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var attr = replace(/<<0>>(?:\s*\(<<1>>*\))?/.source, [identifier, roundExpression]);
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Prism.languages.insertBefore('csharp', 'class-name', {
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'attribute': {
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// Attributes
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// [Foo], [Foo(1), Bar(2, Prop = "foo")], [return: Foo(1), Bar(2)], [assembly: Foo(Bar)]
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pattern: re(/((?:^|[^\s\w>)?])\s*\[\s*)(?:<<0>>\s*:\s*)?<<1>>(?:\s*,\s*<<1>>)*(?=\s*\])/.source, [attrTarget, attr]),
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lookbehind: true,
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greedy: true,
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inside: {
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'target': {
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pattern: re(/^<<0>>(?=\s*:)/.source, [attrTarget]),
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alias: 'keyword'
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},
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'attribute-arguments': {
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pattern: re(/\(<<0>>*\)/.source, [roundExpression]),
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inside: Prism.languages.csharp
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},
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'class-name': {
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pattern: RegExp(identifier),
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inside: {
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'punctuation': /\./
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}
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},
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'punctuation': /[:,]/
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}
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}
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});
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// string interpolation
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var formatString = /:[^}\r\n]+/.source;
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// multi line
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var mInterpolationRound = nested(replace(/[^"'/()]|<<0>>|\(<<self>>*\)/.source, [regularStringCharacterOrComment]), 2);
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var mInterpolation = replace(/\{(?!\{)(?:(?![}:])<<0>>)*<<1>>?\}/.source, [mInterpolationRound, formatString]);
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// single line
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var sInterpolationRound = nested(replace(/[^"'/()]|\/(?!\*)|\/\*(?:[^*]|\*(?!\/))*\*\/|<<0>>|\(<<self>>*\)/.source, [regularStringOrCharacter]), 2);
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var sInterpolation = replace(/\{(?!\{)(?:(?![}:])<<0>>)*<<1>>?\}/.source, [sInterpolationRound, formatString]);
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function createInterpolationInside(interpolation, interpolationRound) {
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return {
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'interpolation': {
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pattern: re(/((?:^|[^{])(?:\{\{)*)<<0>>/.source, [interpolation]),
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lookbehind: true,
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inside: {
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'format-string': {
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pattern: re(/(^\{(?:(?![}:])<<0>>)*)<<1>>(?=\}$)/.source, [interpolationRound, formatString]),
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lookbehind: true,
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inside: {
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'punctuation': /^:/
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}
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},
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'punctuation': /^\{|\}$/,
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'expression': {
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pattern: /[\s\S]+/,
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alias: 'language-csharp',
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inside: Prism.languages.csharp
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}
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}
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},
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'string': /[\s\S]+/
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};
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}
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Prism.languages.insertBefore('csharp', 'string', {
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'interpolation-string': [
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{
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pattern: re(/(^|[^\\])(?:\$@|@\$)"(?:""|\\[\s\S]|\{\{|<<0>>|[^\\{"])*"/.source, [mInterpolation]),
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lookbehind: true,
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greedy: true,
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inside: createInterpolationInside(mInterpolation, mInterpolationRound),
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},
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{
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pattern: re(/(^|[^@\\])\$"(?:\\.|\{\{|<<0>>|[^\\"{])*"/.source, [sInterpolation]),
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lookbehind: true,
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greedy: true,
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inside: createInterpolationInside(sInterpolation, sInterpolationRound),
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}
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]
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});
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}(Prism));
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Prism.languages.dotnet = Prism.languages.cs = Prism.languages.csharp;
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