"use strict";
(function(){
const wMsg = function(type,data){
postMessage({
type,
data: arguments.length<3
? data
: Array.prototype.slice.call(arguments,1)
});
};
const stderr = function(){wMsg('stderr', Array.prototype.slice.call(arguments));};
self.onerror = function() {
const err = arguments[4];
if(err && 'ExitStatus'==err.name){
pikchrModule.isDead = true;
stderr("FATAL ERROR:", err.message);
stderr("Restarting the app requires reloading the page.");
wMsg('error', err);
}
pikchrModule.setStatus('Exception thrown, see JavaScript console: '+err);
};
self.onmessage = function f(ev){
ev = ev.data;
switch(ev.type){
case 'pikchr':
if(pikchrModule.isDead){
stderr("wasm module has exit()ed. Cannot pikchr.");
return;
}
if(!f._){
f._ = pikchrModule.cwrap('pikchr', 'string', [
'string', 'string', 'number',
'number', 'number'
]);
}
wMsg('working','start');
const stack = pikchrModule.stackSave();
try {
const pnWidth = pikchrModule.stackAlloc(4),
pnHeight = pikchrModule.stackAlloc(4);
let script = '', flags = 0, cssClass = null;
if('string'===typeof ev.data){
script = ev.data;
}else if(ev.data && 'object'===typeof ev.data){
script = ev.data.pikchr;
flags = ev.data.darkMode ? 0x02 : 0;
if(ev.data.cssClass) cssClass = ev.data.cssClass;
}
pikchrModule.setValue(pnWidth, 0, "i32");
pikchrModule.setValue(pnHeight, 0, "i32");
const msg = {
pikchr: script,
result: (f._(script, cssClass, flags, pnWidth, pnHeight) || "").trim(),
flags: flags
};
msg.isError = !!(msg.result && msg.result.startsWith('<div'));
if(msg.isError){
msg.width = msg.height = null;
}else{
msg.width = pikchrModule.getValue(pnWidth, "i32");
msg.height = pikchrModule.getValue(pnHeight, "i32");
}
wMsg('pikchr', msg);
} finally {
pikchrModule.stackRestore(stack);
wMsg('working','end');
}
return;
};
console.warn("Unknown pikchr-worker message type:",ev);
};
const pikchrModule = {
print: function(){wMsg('stdout', Array.prototype.slice.call(arguments));},
printErr: stderr,
setStatus: function f(text){
if(!f.last) f.last = { step: 0, text: '' };
else if(text === f.last.text) return;
f.last.text = text;
wMsg('module',{
type:'status',
data:{step: ++f.last.step, text: text||null}
});
}
};
importScripts('pikchr.js');
initPikchrModule(pikchrModule).then(function(thisModule){
wMsg('pikchr-ready');
});
})();