chore: merge blocksuite source code (#9213)

blocksuite/framework/block-std/src/gfx/keyboard.ts

@@ -0,0 +1,51 @@
+import { DisposableGroup } from '@blocksuite/global/utils';
+import { Signal } from '@preact/signals-core';
+
+import type { BlockStdScope } from '../scope/block-std-scope.js';
+
+export class KeyboardController {
+  private _disposable = new DisposableGroup();
+
+  shiftKey$ = new Signal<boolean>(false);
+
+  spaceKey$ = new Signal<boolean>(false);
+
+  constructor(readonly std: BlockStdScope) {
+    this._init();
+  }
+
+  private _init() {
+    this._disposable.add(
+      this._listenKeyboard('keydown', evt => {
+        this.shiftKey$.value = evt.shiftKey && evt.key === 'Shift';
+        this.spaceKey$.value = evt.code === 'Space';
+      })
+    );
+
+    this._disposable.add(
+      this._listenKeyboard('keyup', evt => {
+        this.shiftKey$.value =
+          evt.shiftKey && evt.key === 'Shift' ? true : false;
+
+        if (evt.code === 'Space') {
+          this.spaceKey$.value = false;
+        }
+      })
+    );
+  }
+
+  private _listenKeyboard(
+    event: 'keydown' | 'keyup',
+    callback: (keyboardEvt: KeyboardEvent) => void
+  ) {
+    document.addEventListener(event, callback, false);
+
+    return () => {
+      document.removeEventListener(event, callback, false);
+    };
+  }
+
+  dispose() {
+    this._disposable.dispose();
+  }
+}