Change the capitalisation of classes 🏛️.

src/lib/parser/Parser.js

@@ -0,0 +1,110 @@
+class Parser {
+  #view;
+  #ptr = 0;
+  #characters = {};
+
+  constructor(buffer, characters = {}) {
+    this.#view = new DataView(buffer);
+    this.#characters = characters;
+  }
+
+  getUint8() {
+    return this.#view.getUint8(this.#ptr++);
+  }
+
+  getUint16() {
+    const val = this.#view.getUint16(this.#ptr, true);
+    this.#ptr += 2;
+    return val;
+  }
+
+  getChar() {
+    const charCode = this.getUint8();
+
+    if (charCode === 0x00) {
+      return 0x00;
+    }
+
+    const char = String.fromCodePoint(charCode);
+
+    if (typeof this.#characters[char] !== 'undefined') {
+      return this.#characters[char];
+    }
+
+    return char;
+  }
+
+  getString() {
+    let str = '';
+    let charCode;
+    do {
+      charCode = this.getUint8();
+
+      if (charCode === 0x00) {
+        break;
+      }
+
+      const flag = (charCode & 0x80) !== 0;
+      charCode &= 0x7f;
+
+      if (charCode < 8) {
+        switch (charCode) {
+          case 1:
+            // Line break
+            str += '<01>\n';
+            break;
+          case 2:
+            // Do not clear the text with the next `printEgo` call?
+            str += '<02>';
+            break;
+          case 3:
+            // New line
+            str += '<03>\n';
+            break;
+          case 4:
+            // Used only in the address sign.
+            str += `<Var[${this.getUint8()}]>`;
+            break;
+          case 0:
+          case 5:
+          case 6:
+          case 7:
+            throw new Error(`Unknown escape code ${charCode}.`);
+          default:
+            break;
+        }
+
+        continue;
+      }
+
+      let char = String.fromCodePoint(charCode);
+
+      if (typeof this.#characters[char] === 'string') {
+        char = this.#characters[char];
+      }
+
+      str += char;
+
+      if (flag) {
+        str += ' ';
+      }
+    } while (true);
+
+    return str;
+  }
+
+  peekUint8() {
+    return this.#view.getUint8(this.#ptr);
+  }
+
+  // Return the position of the next byte to read.
+  get pointer() {
+    return this.#ptr;
+  }
+
+  get length() {
+    return this.#view.byteLength;
+  }
+}
+
+export default Parser;

src/lib/parser/parseGlobdata.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 
 const parseGlobdata = (arrayBuffer, i = 0, offset = 0) => {
   const parser = new Parser(arrayBuffer);

src/lib/parser/parsePalette.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 
 // Generic palette parser used in rooms and title screens.
 const parsePalette = (arrayBuffer, offset = 0) => {

src/lib/parser/parsePreps.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 
 const assert = console.assert;
 

src/lib/parser/parseRoomGfx.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 
 const assert = console.assert;
 

src/lib/parser/parseRooms.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 import parseRoomHeader from './room/parseRoomHeader.js';
 import parseRoomNametable from './room/parseRoomNametable.js';
 import parsePalette from './parsePalette.js';

src/lib/parser/parseScript.js

@@ -1,5 +1,5 @@
 import parseScriptCode from './parseScriptCode.js';
-import Parser from './parser.js';
+import Parser from './Parser.js';
 const assert = console.assert;
 
 const parseScript = (arrayBuffer, i, offset = 0, characters = {}) => {

src/lib/parser/parseTitles.js

@@ -1,4 +1,4 @@
-import Parser from './parser.js';
+import Parser from './Parser.js';
 import parsePalette from './parsePalette.js';
 
 const assert = console.assert;

src/lib/parser/room/parseRoomAttributes.js

@@ -1,4 +1,4 @@
-import Parser from '../parser.js';
+import Parser from '../Parser.js';
 
 const parseRoomAttributes = (arrayBuffer, offset = 0, width = 0) => {
   const parser = new Parser(arrayBuffer);

src/lib/parser/room/parseRoomBoxes.js

@@ -1,4 +1,4 @@
-import Parser from '../parser.js';
+import Parser from '../Parser.js';
 
 const assert = console.assert;
 

src/lib/parser/room/parseRoomHeader.js

@@ -1,4 +1,4 @@
-import Parser from '../parser.js';
+import Parser from '../Parser.js';
 
 const assert = console.assert;
 

src/lib/parser/room/parseRoomMatrix.js

@@ -1,4 +1,4 @@
-import Parser from '../parser.js';
+import Parser from '../Parser.js';
 
 const assert = console.assert;
 

src/lib/parser/room/parseRoomNametable.js

@@ -1,4 +1,4 @@
-import Parser from '../parser.js';
+import Parser from '../Parser.js';
 
 const assert = console.assert;
 

src/lib/serialiser/Serialiser.js

@@ -0,0 +1,58 @@
+const maxByteLength = 16384; // The largest resource is sprdata.
+
+class Serialiser {
+  #view;
+  #ptr = 0;
+  #characters = {};
+
+  constructor(characters = {}) {
+    const buffer = new ArrayBuffer(0, { maxByteLength });
+    this.#view = new DataView(buffer);
+    // Swap keys for values.
+    this.#characters = Object.fromEntries(
+      Object.entries(characters).map(([key, value]) => [value, key]),
+    );
+  }
+
+  setUint8(value = 0x00) {
+    this.#resize(this.#ptr + 1);
+    this.#view.setUint8(this.#ptr++, value);
+  }
+
+  setUint16(value = 0x00) {
+    this.#resize(this.#ptr + 2);
+    this.#view.setUint16(this.#ptr, value, true);
+    this.#ptr += 2;
+  }
+
+  setString(str) {
+    // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt#looping_with_codepointat
+    for (let codePoint of str) {
+      if (this.#characters[codePoint] !== undefined) {
+        codePoint = this.#characters[codePoint];
+      }
+      this.setUint8(codePoint.codePointAt(0));
+    }
+  }
+
+  // Firefox doesn't support ArrayBuffer#resize.
+  #resize(newByteLength) {
+    if (ArrayBuffer.prototype.resize) {
+      this.#view.buffer.resize(newByteLength);
+      return;
+    }
+
+    const newArrayBuffer = new ArrayBuffer(newByteLength);
+    const view = new DataView(newArrayBuffer);
+    for (let i = 0; i < this.#view.buffer.byteLength; i++) {
+      view.setUint8(i, this.#view.getUint8(i));
+    }
+    this.#view = view;
+  }
+
+  get buffer() {
+    return this.#view.buffer;
+  }
+}
+
+export default Serialiser;

src/lib/serialiser/room/serialiseRoomAttributes.js

@@ -1,4 +1,4 @@
-import Serialiser from '../serialiser.js';
+import Serialiser from '../Serialiser.js';
 import { compress } from '../serialiserUtils.js';
 
 const serialiseRoomAttributes = (attributes = [], width = 0) => {

src/lib/serialiser/room/serialiseRoomBoxes.js

@@ -1,4 +1,4 @@
-import Serialiser from '../serialiser.js';
+import Serialiser from '../Serialiser.js';
 
 const serialiseRoomBoxes = (boxes = []) => {
   const serialiser = new Serialiser();

src/lib/serialiser/room/serialiseRoomHeader.js

@@ -1,4 +1,4 @@
-import Serialiser from '../serialiser.js';
+import Serialiser from '../Serialiser.js';
 
 const serialiseRoomHeader = (header) => {
   const serialiser = new Serialiser();

src/lib/serialiser/room/serialiseRoomMatrix.js

@@ -1,4 +1,4 @@
-import Serialiser from '../serialiser.js';
+import Serialiser from '../Serialiser.js';
 
 const serialiseRoomMatrix = (matrix = []) => {
   const serialiser = new Serialiser();

src/lib/serialiser/room/serialiseRoomNametable.js

@@ -1,4 +1,4 @@
-import Serialiser from '../serialiser.js';
+import Serialiser from '../Serialiser.js';
 import { compress } from '../serialiserUtils.js';
 
 const serialiseRoomNametable = (nametable = []) => {

src/lib/serialiser/serialisePalette.js

@@ -1,4 +1,4 @@
-import Serialiser from './serialiser.js';
+import Serialiser from './Serialiser.js';
 
 const serialisePalette = (palette = []) => {
   const serialiser = new Serialiser();

src/lib/serialiser/serialisePreps.js

@@ -1,4 +1,4 @@
-import Serialiser from './serialiser.js';
+import Serialiser from './Serialiser.js';
 
 const serialisePreps = (preps = [], characters = {}) => {
   const serialiser = new Serialiser(characters);