feat(json-crdt-extensions): 🎸 add inter-block iteration for inline el…

…ements

src/json-crdt-extensions/peritext/block/Block.ts

@@ -3,6 +3,7 @@ import {CONST, updateJson, updateNum} from '../../../json-hash';
 import {MarkerOverlayPoint} from '../overlay/MarkerOverlayPoint';
 import {OverlayPoint} from '../overlay/OverlayPoint';
 import {UndefEndIter, type UndefIterator} from '../../../util/iterator';
+import {Inline} from './Inline';
 import type {Path} from '../../../json-pointer';
 import type {Printable} from 'tree-dump';
 import type {Peritext} from '../Peritext';
@@ -93,6 +94,19 @@ export class Block<Attr = unknown> implements IBlock, Printable, Stateful {
     return new UndefEndIter(this.tuples0());
   }
 
+  public inline0(): UndefIterator<Inline> {
+    const txt = this.txt;
+    const iterator = this.tuples0();
+    return () => {
+      const pair = iterator();
+      return pair && Inline.create(txt, pair[0], pair[1]);
+    };
+  }
+
+  public inline(): IterableIterator<Inline> {
+    return new UndefEndIter(this.inline0());
+  }
+
   // ----------------------------------------------------------------- Stateful
 
   public hash: number = 0;

src/json-crdt-extensions/peritext/block/__tests__/Block.iteration.spec.ts

@@ -118,3 +118,25 @@ describe('tuples', () => {
     expect(text2).toBe('\nworld');
   });
 });
+
+describe('inline', () => {
+  test('in markup-less document', () => {
+    const {peritext} = setupHelloWorldKit();
+    peritext.refresh();
+    const blocks = peritext.blocks;
+    const block = blocks.root.children[0]!;
+    const text = [...block.inline()].map(inline => inline.text()).join('');
+    expect(text).toBe('hello world');
+  });
+
+  test('can iterate through all text chunks in two-block documents', () => {
+    const {peritext} = setupTwoBlockDocument();
+    expect(peritext.blocks.root.children.length).toBe(2);
+    const block1 = peritext.blocks.root.children[0]!;
+    const block2 = peritext.blocks.root.children[1]!;
+    const text1 = [...block1.inline()].map(inline => inline.text()).join('');
+    const text2 = [...block2.inline()].map(inline => inline.text()).join('');
+    expect(text1).toBe('hello ');
+    expect(text2).toBe('\nworld');
+  });
+});