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(function () {
if (
typeof self !== 'undefined' && !self.Prism ||
typeof global !== 'undefined' && !global.Prism
) {
return;
}
var autoLinkerProcess = function (grammar) {
if (Prism.plugins.autolinker) {
Prism.plugins.autolinker.processGrammar(grammar);
}
return grammar;
};
var dataURI = {
pattern: /(.)\bdata:[^\/]+\/[^,]+,(?:(?!\1)[\s\S]|\\\1)+(?=\1)/,
lookbehind: true,
inside: {
'language-css': {
pattern: /(data:[^\/]+\/(?:[^+,]+\+)?css,)[\s\S]+/,
lookbehind: true
},
'language-javascript': {
pattern: /(data:[^\/]+\/(?:[^+,]+\+)?javascript,)[\s\S]+/,
lookbehind: true
},
'language-json': {
pattern: /(data:[^\/]+\/(?:[^+,]+\+)?json,)[\s\S]+/,
lookbehind: true
},
'language-markup': {
pattern: /(data:[^\/]+\/(?:[^+,]+\+)?(?:html|xml),)[\s\S]+/,
lookbehind: true
}
}
};
// Tokens that may contain URLs
var candidates = ['url', 'attr-value', 'string'];
Prism.plugins.dataURIHighlight = {
processGrammar: function (grammar) {
// Abort if grammar has already been processed
if (!grammar || grammar['data-uri']) {
return;
}
Prism.languages.DFS(grammar, function (key, def, type) {
if (candidates.indexOf(type) > -1 && Prism.util.type(def) !== 'Array') {
if (!def.pattern) {
def = this[key] = {
pattern: def
};
}
def.inside = def.inside || {};
if (type == 'attr-value') {
Prism.languages.insertBefore('inside', def.inside['url-link'] ? 'url-link' : 'punctuation', {
'data-uri': dataURI
}, def);
}
else {
if (def.inside['url-link']) {
Prism.languages.insertBefore('inside', 'url-link', {
'data-uri': dataURI
}, def);
} else {
def.inside['data-uri'] = dataURI;
}
}
}
});
grammar['data-uri'] = dataURI;
}
};
Prism.hooks.add('before-highlight', function (env) {
// Prepare the needed grammars for this code block
if (dataURI.pattern.test(env.code)) {
for (var p in dataURI.inside) {
if (dataURI.inside.hasOwnProperty(p)) {
if (!dataURI.inside[p].inside && dataURI.inside[p].pattern.test(env.code)) {
var lang = p.match(/^language-(.+)/)[1];
if (Prism.languages[lang]) {
dataURI.inside[p].inside = {
rest: autoLinkerProcess(Prism.languages[lang])
};
}
}
}
}
}
Prism.plugins.dataURIHighlight.processGrammar(env.grammar);
});
}());
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