fix: lost focus after backspace after break

packages/decap-cms-widget-markdown/src/MarkdownControl/plugins/blocks/events/keyDown.js

@@ -1,9 +1,11 @@
 import isHotkey from 'is-hotkey';
+import { Editor, Transforms } from 'slate';
 
 import keyDownEnter from './keyDownEnter';
 import keyDownBackspace from './keyDownBackspace';
 import isCursorInNonDefaultBlock from '../locations/isCursorInNonDefaultBlock';
 import toggleBlock from './toggleBlock';
+import isCursorCollapsedAfterSoftBreak from '../locations/isCursorCollapsedAfterSoftBreak';
 
 const HEADING_HOTKEYS = {
  'mod+1': 'heading-one',
@@ -25,6 +27,13 @@ function keyDown(event, editor) {
  }
  }
 
+ if (isHotkey('backspace', event) && isCursorCollapsedAfterSoftBreak(editor)) {
+ const [, path] = Editor.previous(editor);
+ Transforms.removeNodes(editor, { at: path });
+ event.preventDefault();
+ return false;
+ }
+
  if (!isCursorInNonDefaultBlock(editor)) return;
 
  if (isHotkey('enter', event)) {

packages/decap-cms-widget-markdown/src/MarkdownControl/plugins/blocks/locations/isCursorCollapsedAfterSoftBreak.js

@@ -0,0 +1,13 @@
+import { Editor, Range } from 'slate';
+
+function isCursorCollapsedAfterSoftBreak(editor) {
+ const { selection } = editor;
+ if (!selection) return false;
+ if (Range.isExpanded(selection)) return false;
+
+ const previous = Editor.previous(editor);
+
+ return previous && previous[0].type == 'break';
+}
+
+export default isCursorCollapsedAfterSoftBreak;