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(function (Prism) {
/**
* Returns the placeholder for the given language id and index.
*
* @param {string} language
* @param {string|number} index
* @returns {string}
*/
function getPlaceholder(language, index) {
return '___' + language.toUpperCase() + index + '___';
}
Object.defineProperties((Prism.languages['markup-templating'] = {}), {
buildPlaceholders: {
/**
* Tokenize all inline templating expressions matching `placeholderPattern`.
*
* If `replaceFilter` is provided, only matches of `placeholderPattern` for which `replaceFilter` returns
* `true` will be replaced.
*
* @param {object} env The environment of the `before-tokenize` hook.
* @param {string} language The language id.
* @param {RegExp} placeholderPattern The matches of this pattern will be replaced by placeholders.
* @param {(match: string) => boolean} [replaceFilter]
*/
value: function (env, language, placeholderPattern, replaceFilter) {
if (env.language !== language) {
return;
}
var tokenStack = (env.tokenStack = []);
env.code = env.code.replace(placeholderPattern, function (match) {
if (typeof replaceFilter === 'function' && !replaceFilter(match)) {
return match;
}
var i = tokenStack.length;
var placeholder;
// Check for existing strings
while (
env.code.indexOf((placeholder = getPlaceholder(language, i))) !== -1
) {
++i;
}
// Create a sparse array
tokenStack[i] = match;
return placeholder;
});
// Switch the grammar to markup
env.grammar = Prism.languages.markup;
},
},
tokenizePlaceholders: {
/**
* Replace placeholders with proper tokens after tokenizing.
*
* @param {object} env The environment of the `after-tokenize` hook.
* @param {string} language The language id.
*/
value: function (env, language) {
if (env.language !== language || !env.tokenStack) {
return;
}
// Switch the grammar back
env.grammar = Prism.languages[language];
var j = 0;
var keys = Object.keys(env.tokenStack);
function walkTokens(tokens) {
for (var i = 0; i < tokens.length; i++) {
// all placeholders are replaced already
if (j >= keys.length) {
break;
}
var token = tokens[i];
if (
typeof token === 'string' ||
(token.content && typeof token.content === 'string')
) {
var k = keys[j];
var t = env.tokenStack[k];
var s = typeof token === 'string' ? token : token.content;
var placeholder = getPlaceholder(language, k);
var index = s.indexOf(placeholder);
if (index > -1) {
++j;
var before = s.substring(0, index);
var middle = new Prism.Token(
language,
Prism.tokenize(t, env.grammar),
'language-' + language,
t
);
var after = s.substring(index + placeholder.length);
var replacement = [];
if (before) {
replacement.push.apply(replacement, walkTokens([before]));
}
replacement.push(middle);
if (after) {
replacement.push.apply(replacement, walkTokens([after]));
}
if (typeof token === 'string') {
tokens.splice.apply(tokens, [i, 1].concat(replacement));
} else {
token.content = replacement;
}
}
} else if (
token.content /* && typeof token.content !== 'string' */
) {
walkTokens(token.content);
}
}
return tokens;
}
walkTokens(env.tokens);
},
},
});
})(Prism);
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