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/* globals marked, unfetch, ES6Promise, Promise */ // eslint-disable-line no-redeclare
if (!self.Promise) {
self.importScripts('https://cdn.jsdelivr.net/npm/es6-promise/dist/es6-promise.js');
self.Promise = ES6Promise;
}
if (!self.fetch) {
self.importScripts('https://cdn.jsdelivr.net/npm/unfetch/dist/unfetch.umd.js');
self.fetch = unfetch;
}
var versionCache = {};
var currentVersion;
onunhandledrejection = function(e) {
throw e.reason;
};
onmessage = function(e) {
if (e.data.version === currentVersion) {
parse(e);
} else {
loadVersion(e.data.version).then(function() {
parse(e);
});
}
};
function parse(e) {
switch (e.data.task) {
case 'defaults':
var defaults = {};
if (typeof marked.getDefaults === 'function') {
defaults = marked.getDefaults();
delete defaults.renderer;
} else if ('defaults' in marked) {
for (var prop in marked.defaults) {
if (prop !== 'renderer') {
defaults[prop] = marked.defaults[prop];
}
}
}
postMessage({
task: e.data.task,
defaults: defaults
});
break;
case 'parse':
var startTime = new Date();
var lexed = marked.lexer(e.data.markdown, e.data.options);
var lexedList = jsonString(lexed);
var parsed = marked.parser(lexed, e.data.options);
var endTime = new Date();
postMessage({
task: e.data.task,
lexed: lexedList,
parsed: parsed,
time: endTime - startTime
});
break;
}
}
function stringRepeat(char, times) {
var s = '';
for (var i = 0; i < times; i++) {
s += char;
}
return s;
}
function jsonString(input, level) {
level = level || 0;
if (Array.isArray(input)) {
if (input.length === 0) {
return '[]';
}
var items = [],
i;
if (!Array.isArray(input[0]) && typeof input[0] === 'object' && input[0] !== null) {
for (i = 0; i < input.length; i++) {
items.push(stringRepeat(' ', 2 * level) + jsonString(input[i], level + 1));
}
return '[\n' + items.join('\n') + '\n]';
}
for (i = 0; i < input.length; i++) {
items.push(jsonString(input[i], level));
}
return '[' + items.join(', ') + ']';
} else if (typeof input === 'object' && input !== null) {
var props = [];
for (var prop in input) {
props.push(prop + ':' + jsonString(input[prop], level));
}
return '{' + props.join(', ') + '}';
} else {
return JSON.stringify(input);
}
}
function loadVersion(ver) {
var promise;
if (versionCache[ver]) {
promise = Promise.resolve(versionCache[ver]);
} else {
promise = fetch(ver)
.then(function(res) { return res.text(); })
.then(function(text) {
versionCache[ver] = text;
return text;
});
}
return promise.then(function(text) {
try {
// eslint-disable-next-line no-new-func
Function(text)();
} catch (err) {
throw new Error('Cannot load that version of marked');
}
currentVersion = ver;
});
}
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