Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-vm/test/integration/tw_very_long_comments.js

@@ -0,0 +1,82 @@
+const {test} = require('tap');
+const fs = require('fs');
+const VirtualMachine = require('../../src/virtual-machine');
+const Runtime = require('../../src/engine/runtime');
+const sb3 = require('../../src/serialization/sb3');
+const RenderedTarget = require('../../src/sprites/rendered-target');
+const Sprite = require('../../src/sprites/sprite');
+const path = require('path');
+
+test('serializes very long comments', t => {
+    const rt = new Runtime();
+    const sprite = new Sprite();
+    const target = new RenderedTarget(sprite);
+    rt.addTarget(target);
+
+    target.createComment('id_short', null, 'short comment', 0, 0, 20, 20, false);
+    target.createComment('id_max_length', null, `start${'0'.repeat(8000 - 5)}`, 0, 0, 20, 20, false);
+    target.createComment('id_max_length_plus_1', null, `start${'0'.repeat(8000 - 5)}a`, 0, 0, 20, 20, false);
+    target.createComment(
+        'id_way_too_long',
+        null,
+        `start${'0'.repeat(8000 - 5 - 3)}endthis should be the truncated part${'0'.repeat(25000)}`,
+        0,
+        0,
+        20,
+        20,
+        false
+    );
+
+    const serialized = sb3.serialize(rt, target.id);
+    const common = {
+        // same for every block, already tested elsewhere, not interesting for here
+        blockId: null,
+        x: 0,
+        y: 0,
+        width: 20,
+        height: 20,
+        minimized: false
+    };
+    t.same(serialized.comments, {
+        id_short: {
+            ...common,
+            text: 'short comment'
+        },
+        id_max_length: {
+            ...common,
+            text: `start${'0'.repeat(8000 - 5)}`
+        },
+        id_max_length_plus_1: {
+            ...common,
+            text: `start${'0'.repeat(8000 - 5)}`,
+            extraText: 'a'
+        },
+        id_way_too_long: {
+            ...common,
+            text: `start${'0'.repeat(8000 - 5 - 3)}end`,
+            extraText: `this should be the truncated part${'0'.repeat(25000)}`
+        }
+    });
+
+    t.end();
+});
+
+test('deserializes very long comments', t => {
+    const vm = new VirtualMachine();
+    const fixture = fs.readFileSync(path.resolve(__dirname, '../fixtures/tw-very-long-comments.sb3'));
+    vm.loadProject(fixture).then(() => {
+        const comments = vm.runtime.targets[0].comments;
+
+        // note that comment IDs may change each time the test project is saved
+        t.equal(comments.b.text, '');
+        t.equal(comments.a.text, 'short');
+        t.equal(comments.c.text, `exactly length limit${'0'.repeat(8000 - 'exactly length limit'.length)}`);
+        t.equal(comments.d.text, `length limit + 1${':'.repeat(8000 - 'length limit + 1'.length)}1`);
+        t.equal(
+            comments.e.text,
+            `unreasonably long${'!'.repeat(8000 - 'unreasonably long'.length)}${'123456789'.repeat(2000)}`
+        );
+
+        t.end();
+    });
+});