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os_proto.html
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<!DOCTYPE html>
<html>
<head>
<title>OS Sequence File Editor</title>
<link rel="icon" href="res/favicon.ico">
<script src="load_os.js"></script>
<script type="text/javascript">
let domErrorLog;
let domEditor;
let domFileInput;
window.addEventListener("load", () => {
domErrorLog = document.getElementById("errorLog");
domEditor = document.getElementById("editor");
domFileInput = document.getElementById("fileInput");
clearEditor();
});
function clearLog() { domErrorLog.innerText = ""; }
function log(...args) {
let str = "Error:\n";
for (const a of args) {
if (str != "") str += "\n";
str += a;
}
domErrorLog.innerText = str;
}
function onDragOver(e) { e.preventDefault(); }
function onFile() { loadFile(domFileInput.files); }
function clearEditor() { fillEditor(new proto.Sequence()); }
function getEditorValue() { return domEditor.value; }
function fillEditor(p) {
domEditor.value = seqObjToStr(applyTweaks(p.toObject()));
}
function onDrop(e) {
e.preventDefault();
const dt = e.dataTransfer;
const files = [];
if (dt.items) {
for (const item of dt.items) {
if (item.kind == "file") files.push(item.getAsFile());
}
} else {
files = dt.files;
}
loadFile(files);
}
function loadFile(files) {
clearLog();
clearEditor();
if (files == null || files.length == 0) {
log("No input file");
return;
}
const reader = new FileReader();
reader.onload = loadProtoBlob;
reader.readAsArrayBuffer(files[0]);
}
function loadProtoBlob(e) {
let p = null;
try {
p = proto.Sequence.deserializeBinary(e.target.result);
} catch (e) {
log("File is corrupted, or not a sequence");
console.error(e);
}
if (p == null) return;
fillEditor(p);
}
function saveBlob(filename, data, type) {
var file = new Blob(data, {type: type});
if (window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveOrOpenBlob(file, filename);
} else {
var a = document.createElement("a");
var url = URL.createObjectURL(file);
a.href = url;
a.download = filename;
document.body.appendChild(a);
a.click();
setTimeout(function() {
document.body.removeChild(a);
window.URL.revokeObjectURL(url);
}, 0);
}
}
function protoToBlob(seq) {
try {
return seq.serializeBinary();
} catch (e) {
log("Serializing sequence failed", seq.toObject());
return null;
}
}
function downloadFile() {
clearLog();
const o = strToSeqObj(getEditorValue());
if (o === null) return;
const data = protoToBlob(objectToSequenceProto(removeTweaks(o)));
if (data === null) return;
saveBlob("result.sequence", [data], "application/octet-stream");
}
class Note { constructor(index) { this.index = index; }}
function noteProtoToType(index) {
return Object.keys(proto.NoteType)[index].replace('S', '#');
}
function noteTypeToProto(type) {
return proto.NoteType[type.replace('#', 'S')];
}
function validNoteType(type) {
try {
return isNumber(noteTypeToProto(type));
} catch {
return false;
}
}
function seqObjToStr(o) {
class State {
constructor(key) {
this.key = key;
this.isArray = false;
this.isMap = false;
}
}
class Serializer {
constructor() {
this.stk = [];
this.str = "";
}
addIndent(delta = 0) {
if (this.str.length > 0) this.str += "\n";
const stop = this.stk.length + delta;
for (let i = 0; i < stop; ++i) this.str += " ";
}
addPrefix(key) {
this.addIndent();
if (key !== null) this.str += key + ": ";
}
add(o, key = null) {
if (o === null || o === undefined) return;
this.addPrefix(key);
this.stk.push(new State(key));
if (Array.isArray(o)) {
if (key.endsWith("Map")) {
this.addMap(o);
} else {
this.addArray(o);
}
} else if (o instanceof Note) {
this.str += noteProtoToType(o.index);
} else if (typeof o == "object") {
this.addObject(o);
} else if (typeof o == "string" || typeof o == "boolean" || isNumber(o)) {
this.str += JSON.stringify(o);
} else {
console.log("Tried to serialize unknown object", o);
}
this.stk.pop();
}
addObjectKV(o) {
for (const key in o) this.add(o[key], key);
}
addObject(o) {
this.str += "(";
this.addObjectKV(o);
this.addIndent(-1);
this.str += ")";
}
addArray(a) {
this.str += "[";
for (const v of a) this.add(v);
this.addIndent(-1);
this.str += "]";
}
addMap(m) {
this.str += "{";
for (const kv of m) {
if (kv.length == 2) {
this.add(kv[1], kv[0]);
} else {
console.log("Badly formatted map kv pair", kv, m);
}
}
this.addIndent(-1);
this.str += "}";
}
}
const s = new Serializer();
s.addObjectKV(o);
return s.str;
}
function strToSeqObj(s) {
class Entry {
constructor(isArray, isMap, out) {
this.isArray = isArray;
this.isMap = isMap;
this.out = out;
}
get stop() { return this.isArray ? ']' : this.isMap ? '}' : ')'; }
}
const root = {};
let stack = [new Entry(false, false, root)];
let error = null;
function parseV(i, l, raw) {
if (l == '(') {
const o = {};
stack.push(new Entry(false, false, o));
return o;
} else if (l == '[') {
const o = [];
stack.push(new Entry(true, false, o));
return o;
} else if (l == '{') {
const o = [];
stack.push(new Entry(false, true, o));
return o;
} else if (validNoteType(l)) {
return new Note(noteTypeToProto(l));
}
try {
return JSON.parse(l);
} catch {
console.log(l);
error = `Can't parse the value on line ${i}: ${raw}`;
return null;
}
}
function parseKv(i, l) {
const j = l.indexOf(':');
if (j == -1) {
error = `Expected key-value pair seperated by ':' on line ${i}: ${l}`;
return null;
}
const v = parseV(i, l.substr(j + 1).trim(), l);
if (v === null) return null;
const k = l.substr(0, j).trim();
return [k, v];
}
function loop(i, l) {
if (l.length == 0) return;
const e = stack[stack.length - 1];
if (l == e.stop) {
stack.pop();
if (stack.length == 0) {
error = `Root object was terminated on line ${i}: ${l}`;
return;
}
} else if (e.isArray) {
const v = parseV(i, l, l);
if (v === null) return;
e.out.push(v);
} else if (e.isMap) {
const kv = parseKv(i, l);
if (kv === null) return;
e.out.push(kv);
} else {
const kv = parseKv(i, l);
if (kv === null) return;
e.out[kv[0]] = kv[1];
}
}
const ss = s.split('\n');
for (let i = 0; i < ss.length; ++i) {
loop(i + 1, ss[i].trim());
if (error !== null) break;
}
if (error) {
log(error);
return null;
}
return root;
}
function applyTweaks(o) {
// Convert note indices to objects.
for (const n of o.notesList || []) n.type = new Note(n.type);
return o;
}
function removeTweaks(o) {
// Convert note pbjects to indices.
for (const n of o.notesList || []) n.type = n.type.index;
return o;
}
</script>
<style>
html {
display: flex;
flex-direction: column;
min-height: 100%;
}
body {
background-color: #212121;
margin: 0;
flex-grow: 1;
}
#head {
background-color: #424242;
width: 100%;
display: flex;
justify-content: space-around;
margin-bottom: 16px;
}
h1, #index {
color: #ffc107;
text-align: center;
font-family: monospace;
font-size: 42px;
flex-grow: 1;
padding: 16px;
margin: 0;
}
#index {
color: #ff5722;
text-decoration: none;
flex-grow: 0;
}
a {
color: #ff5722;
font-family: monospace;
cursor: pointer;
text-decoration: underline;
}
#wrap { padding: 0 16px; }
#wrap, #fileInputLabel {
color: #f5f5f5;
font-family: monospace;
font-size: 16px;
}
input[type="file"] {
display: none;
}
#editor {
background-color: #424242;
color: #f5f5f5;
width: 100%;
}
#errorLog {
color: #f44336;
line-height: 16px;
}
</style>
</head>
<body ondrop="onDrop(event)" ondragover="onDragOver(event)">
<div id="head">
<a id="index" href="index.html"><</a>
<h1>OS Sequence File Editor</h1>
</div>
<div id="wrap">
<a href="https://onlinesequencer.net/">Online Sequencer</a>'s .sequence files
are encoded using <a href="https://developers.google.com/protocol-buffers">Protocol Buffers</a>.
Protos have a bunch of technical benefits, but they're not human readable or
editable like the old .txt format was. This tool helps you edit them.
<br/>
<br/>
Drag and drop a .sequence file here to convert it to text. Or click
<label id="fileInputLabel">
<input type="file" id="fileInput" onchange="onFile()">
<a>here</a>
</label>
to upload a file.
<br/>
<br/>
<textarea id="editor" rows="20"></textarea>
<br/>
<br/>
Once you've finished editing it, click <a onclick="downloadFile()">here</a> to
convert back to a .sequence file.
<br/>
<br/>
<br/>
<div id="errorLog"></div>
</div>
</body>
</html>