Initial commit of the qmk keymap generator

lib/Layer.ts

@@ -0,0 +1,53 @@
+import { IKeyRow, IKeyRows } from './Row';
+
+export interface ILayer extends IterableIterator<IKeyRow> {
+  rows: IKeyRows;
+  index: number;
+  length: number;
+  forEach(fn: (k: IKeyRow, i: number) => any): void;
+  map(fn: (k: IKeyRow, i: number) => IKeyRow): IKeyRows;
+}
+
+export type ILayers = ILayer[];
+
+class Layer implements ILayer {
+  rows: IKeyRows = [];
+  index: number = 0;
+
+  constructor(rows: IKeyRows) {
+    this.rows = rows;
+    this.index = 0;
+  }
+
+  forEach(fn: (k: IKeyRow, i: number) => any): void {
+    return this.rows.forEach(fn);
+  }
+
+  map(fn: (k: IKeyRow, i: number) => IKeyRow): IKeyRows {
+    return this.rows.map(fn);
+  }
+
+  get length(): number {
+    return this.rows.length;
+  }
+
+  public next(): IteratorResult<IKeyRow> {
+    if (this.index < this.rows.length) {
+      return {
+        done: false,
+        value: this.rows[this.index++],
+      };
+    }
+    return {
+      done: true,
+      value: null,
+    };
+  }
+
+  [Symbol.iterator](): IterableIterator<IKeyRow> {
+    return this;
+  }
+}
+
+export const layer = (...rows: IKeyRows): ILayer => new Layer(rows);
+export default layer;