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/**
* @param {string} value
* @returns {RegExp}
* */
/**
* @param {RegExp | string } re
* @returns {string}
*/
function source(re) {
if (!re) return null;
if (typeof re === "string") return re;
return re.source;
}
/**
* @param {RegExp | string } re
* @returns {string}
*/
function anyNumberOfTimes(re) {
return concat('(', re, ')*');
}
/**
* @param {RegExp | string } re
* @returns {string}
*/
function optional(re) {
return concat('(', re, ')?');
}
/**
* @param {...(RegExp | string) } args
* @returns {string}
*/
function concat(...args) {
const joined = args.map((x) => source(x)).join("");
return joined;
}
/**
* Any of the passed expresssions may match
*
* Creates a huge this | this | that | that match
* @param {(RegExp | string)[] } args
* @returns {string}
*/
function either(...args) {
const joined = '(' + args.map((x) => source(x)).join("|") + ")";
return joined;
}
/*
Language: Handlebars
Requires: xml.js
Author: Robin Ward <robin.ward@gmail.com>
Description: Matcher for Handlebars as well as EmberJS additions.
Website: https://handlebarsjs.com
Category: template
*/
function handlebars(hljs) {
const BUILT_INS = {
'builtin-name': [
'action',
'bindattr',
'collection',
'component',
'concat',
'debugger',
'each',
'each-in',
'get',
'hash',
'if',
'in',
'input',
'link-to',
'loc',
'log',
'lookup',
'mut',
'outlet',
'partial',
'query-params',
'render',
'template',
'textarea',
'unbound',
'unless',
'view',
'with',
'yield'
].join(" ")
};
const LITERALS = {
literal: [
'true',
'false',
'undefined',
'null'
].join(" ")
};
// as defined in https://handlebarsjs.com/guide/expressions.html#literal-segments
// this regex matches literal segments like ' abc ' or [ abc ] as well as helpers and paths
// like a/b, ./abc/cde, and abc.bcd
const DOUBLE_QUOTED_ID_REGEX = /""|"[^"]+"/;
const SINGLE_QUOTED_ID_REGEX = /''|'[^']+'/;
const BRACKET_QUOTED_ID_REGEX = /\[\]|\[[^\]]+\]/;
const PLAIN_ID_REGEX = /[^\s!"#%&'()*+,.\/;<=>@\[\\\]^`{|}~]+/;
const PATH_DELIMITER_REGEX = /(\.|\/)/;
const ANY_ID = either(
DOUBLE_QUOTED_ID_REGEX,
SINGLE_QUOTED_ID_REGEX,
BRACKET_QUOTED_ID_REGEX,
PLAIN_ID_REGEX
);
const IDENTIFIER_REGEX = concat(
optional(/\.|\.\/|\//), // relative or absolute path
ANY_ID,
anyNumberOfTimes(concat(
PATH_DELIMITER_REGEX,
ANY_ID
))
);
// identifier followed by a equal-sign (without the equal sign)
const HASH_PARAM_REGEX = concat(
'(',
BRACKET_QUOTED_ID_REGEX, '|',
PLAIN_ID_REGEX,
')(?==)'
);
const HELPER_NAME_OR_PATH_EXPRESSION = {
begin: IDENTIFIER_REGEX,
lexemes: /[\w.\/]+/
};
const HELPER_PARAMETER = hljs.inherit(HELPER_NAME_OR_PATH_EXPRESSION, {
keywords: LITERALS
});
const SUB_EXPRESSION = {
begin: /\(/,
end: /\)/
// the "contains" is added below when all necessary sub-modes are defined
};
const HASH = {
// fka "attribute-assignment", parameters of the form 'key=value'
className: 'attr',
begin: HASH_PARAM_REGEX,
relevance: 0,
starts: {
begin: /=/,
end: /=/,
starts: {
contains: [
hljs.NUMBER_MODE,
hljs.QUOTE_STRING_MODE,
hljs.APOS_STRING_MODE,
HELPER_PARAMETER,
SUB_EXPRESSION
]
}
}
};
const BLOCK_PARAMS = {
// parameters of the form '{{#with x as | y |}}...{{/with}}'
begin: /as\s+\|/,
keywords: {
keyword: 'as'
},
end: /\|/,
contains: [
{
// define sub-mode in order to prevent highlighting of block-parameter named "as"
begin: /\w+/
}
]
};
const HELPER_PARAMETERS = {
contains: [
hljs.NUMBER_MODE,
hljs.QUOTE_STRING_MODE,
hljs.APOS_STRING_MODE,
BLOCK_PARAMS,
HASH,
HELPER_PARAMETER,
SUB_EXPRESSION
],
returnEnd: true
// the property "end" is defined through inheritance when the mode is used. If depends
// on the surrounding mode, but "endsWithParent" does not work here (i.e. it includes the
// end-token of the surrounding mode)
};
const SUB_EXPRESSION_CONTENTS = hljs.inherit(HELPER_NAME_OR_PATH_EXPRESSION, {
className: 'name',
keywords: BUILT_INS,
starts: hljs.inherit(HELPER_PARAMETERS, {
end: /\)/
})
});
SUB_EXPRESSION.contains = [SUB_EXPRESSION_CONTENTS];
const OPENING_BLOCK_MUSTACHE_CONTENTS = hljs.inherit(HELPER_NAME_OR_PATH_EXPRESSION, {
keywords: BUILT_INS,
className: 'name',
starts: hljs.inherit(HELPER_PARAMETERS, {
end: /\}\}/
})
});
const CLOSING_BLOCK_MUSTACHE_CONTENTS = hljs.inherit(HELPER_NAME_OR_PATH_EXPRESSION, {
keywords: BUILT_INS,
className: 'name'
});
const BASIC_MUSTACHE_CONTENTS = hljs.inherit(HELPER_NAME_OR_PATH_EXPRESSION, {
className: 'name',
keywords: BUILT_INS,
starts: hljs.inherit(HELPER_PARAMETERS, {
end: /\}\}/
})
});
const ESCAPE_MUSTACHE_WITH_PRECEEDING_BACKSLASH = {
begin: /\\\{\{/,
skip: true
};
const PREVENT_ESCAPE_WITH_ANOTHER_PRECEEDING_BACKSLASH = {
begin: /\\\\(?=\{\{)/,
skip: true
};
return {
name: 'Handlebars',
aliases: [
'hbs',
'html.hbs',
'html.handlebars',
'htmlbars'
],
case_insensitive: true,
subLanguage: 'xml',
contains: [
ESCAPE_MUSTACHE_WITH_PRECEEDING_BACKSLASH,
PREVENT_ESCAPE_WITH_ANOTHER_PRECEEDING_BACKSLASH,
hljs.COMMENT(/\{\{!--/, /--\}\}/),
hljs.COMMENT(/\{\{!/, /\}\}/),
{
// open raw block "{{{{raw}}}} content not evaluated {{{{/raw}}}}"
className: 'template-tag',
begin: /\{\{\{\{(?!\/)/,
end: /\}\}\}\}/,
contains: [OPENING_BLOCK_MUSTACHE_CONTENTS],
starts: {
end: /\{\{\{\{\//,
returnEnd: true,
subLanguage: 'xml'
}
},
{
// close raw block
className: 'template-tag',
begin: /\{\{\{\{\//,
end: /\}\}\}\}/,
contains: [CLOSING_BLOCK_MUSTACHE_CONTENTS]
},
{
// open block statement
className: 'template-tag',
begin: /\{\{#/,
end: /\}\}/,
contains: [OPENING_BLOCK_MUSTACHE_CONTENTS]
},
{
className: 'template-tag',
begin: /\{\{(?=else\}\})/,
end: /\}\}/,
keywords: 'else'
},
{
className: 'template-tag',
begin: /\{\{(?=else if)/,
end: /\}\}/,
keywords: 'else if'
},
{
// closing block statement
className: 'template-tag',
begin: /\{\{\//,
end: /\}\}/,
contains: [CLOSING_BLOCK_MUSTACHE_CONTENTS]
},
{
// template variable or helper-call that is NOT html-escaped
className: 'template-variable',
begin: /\{\{\{/,
end: /\}\}\}/,
contains: [BASIC_MUSTACHE_CONTENTS]
},
{
// template variable or helper-call that is html-escaped
className: 'template-variable',
begin: /\{\{/,
end: /\}\}/,
contains: [BASIC_MUSTACHE_CONTENTS]
}
]
};
}
/*
Language: HTMLBars (legacy)
Requires: xml.js
Description: Matcher for Handlebars as well as EmberJS additions.
Website: https://github.com/tildeio/htmlbars
Category: template
*/
function htmlbars(hljs) {
const definition = handlebars(hljs);
definition.name = "HTMLbars";
// HACK: This lets handlebars do the auto-detection if it's been loaded (by
// default the build script will load in alphabetical order) and if not (perhaps
// an install is only using `htmlbars`, not `handlebars`) then this will still
// allow HTMLBars to participate in the auto-detection
// worse case someone will have HTMLbars and handlebars competing for the same
// content and will need to change their setup to only require handlebars, but
// I don't consider this a breaking change
if (hljs.getLanguage("handlebars")) {
definition.disableAutodetect = true;
}
return definition;
}
module.exports = htmlbars;