From d4586357284f10848b205581b66f2c375d8e4d99 Mon Sep 17 00:00:00 2001
From: MasanobuRyuman <22011376mr@tama.ac.jp>
Date: Tue, 13 Jun 2023 19:27:45 +0900
Subject: [PATCH] feat: node copy with button

---
 packages/core/src/helpers/index.ts      |  2 +-
 packages/core/src/helpers/node/index.ts | 19 ++++++++++-
 packages/core/src/toolmenu/index.tsx    | 44 ++++++++++++++++++++-----
 3 files changed, 55 insertions(+), 10 deletions(-)

diff --git a/packages/core/src/helpers/index.ts b/packages/core/src/helpers/index.ts
index df1d2b26..144ad8b8 100644
--- a/packages/core/src/helpers/index.ts
+++ b/packages/core/src/helpers/index.ts
@@ -2,7 +2,7 @@ import { style } from '@vanilla-extract/css';
 import Element, * as elements from './element';
 import * as logger from './logger';
 import * as error from './error';
-import Node from './node';
+import * as Node from './node';
 import Path, * as pathHelpers from './path';
 import ReactEditor from './reactEditor';
 import * as transforms from './transform';
diff --git a/packages/core/src/helpers/node/index.ts b/packages/core/src/helpers/node/index.ts
index 82f33658..3e5901f7 100644
--- a/packages/core/src/helpers/node/index.ts
+++ b/packages/core/src/helpers/node/index.ts
@@ -1,3 +1,20 @@
-import { Node as SlateNode } from 'slate';
+import { Editor, Node as SlateNode } from 'slate';
 
 export default SlateNode;
+
+export const copyNode = async (editor: Editor) => {
+  const dataTransfer = new DataTransfer();
+  editor.setFragmentData(dataTransfer, 'copy');
+  const clipboardBlobList = dataTransfer.types.map((type) => {
+    return new Blob([dataTransfer.getData(type)], { type: type });
+  });
+
+  const clipBoardItem: Record<string, Blob> = {};
+  const removeType = 'application/x-slate-fragment';
+  clipboardBlobList
+    .filter((value) => value.type !== removeType)
+    .forEach((blob) => {
+      clipBoardItem[blob.type] = blob;
+    });
+  await navigator.clipboard.write([new ClipboardItem(clipBoardItem)]);
+};
diff --git a/packages/core/src/toolmenu/index.tsx b/packages/core/src/toolmenu/index.tsx
index 383526a3..172b8d0b 100644
--- a/packages/core/src/toolmenu/index.tsx
+++ b/packages/core/src/toolmenu/index.tsx
@@ -1,9 +1,11 @@
 import { useCallback } from 'react';
-import { Node, Path } from 'slate';
+import { Element, Node, Path } from 'slate';
 import { useSlate } from 'slate-react';
 import { CopyIcon } from '../components/icons/copy';
 import { DustboxIcon } from '../components/icons/dustbox';
 import { styles } from './index.css';
+import { Text } from 'slate';
+import { helpers } from '../helpers';
 
 export type ToolmenuProps = {
   path: Path;
@@ -19,13 +21,39 @@ export const Toolmenu: React.FC<ToolmenuProps> = ({ path, onDone }) => {
     onDone();
   }, [editor, path, onDone]);
 
-  const handleCopyClick = useCallback(() => {
-    const node = Node.get(editor, path);
-    // TODO: There seems to be no API for copying. Replace this workaround if any found.
-    const copiedNode = JSON.parse(JSON.stringify(node));
-    editor.insertNodes(copiedNode, {
-      at: Path.next(path),
-    });
+  const handleCopyClick = useCallback(async () => {
+    const selection = editor.selection;
+    if (!selection || selection.anchor.offset === selection.focus.offset) {
+      const node = Node.get(editor, path);
+      if (!Element.isElement(node)) return;
+      const lastChildIndex = node.children.length - 1;
+      const lastNode = node.children[lastChildIndex];
+      if (!Text.isText(lastNode)) return;
+      const lastOffset = lastNode.text.length;
+      editor.selection = {
+        anchor: {
+          path: [...path, 0],
+          offset: 0,
+        },
+        focus: {
+          path: [...path, lastChildIndex],
+          offset: lastOffset,
+        },
+      };
+      await helpers.Node.copyNode(editor);
+      editor.selection = {
+        anchor: {
+          path: [...path, 0],
+          offset: 0,
+        },
+        focus: {
+          path: [...path, 0],
+          offset: 0,
+        },
+      };
+    } else {
+      helpers.Node.copyNode(editor);
+    }
     onDone();
   }, [editor, path, onDone]);