Merge pull request #145 from fantasticit/fix/drag

2022-08-04 16:54:12 +08:00 · 2022-08-04 16:54:12 +08:00 · 14beaff5c8
parent a4ea4bf965 bf4a3ec576
commit 14beaff5c8
19 changed files with 569 additions and 360 deletions
--- a/packages/client/src/tiptap/core/extensions/dragable.ts
+++ b/packages/client/src/tiptap/core/extensions/dragable.ts
@ -0,0 +1,173 @@
+import { Extension } from '@tiptap/core';
+import { Plugin, PluginKey, Selection } from 'prosemirror-state';
+import { NodeSelection } from 'prosemirror-state';
+import { __serializeForClipboard, EditorView } from 'prosemirror-view';
+import { ActiveNode, removePossibleTable, selectRootNodeByDom } from 'tiptap/prose-utils';
+
+export const DragablePluginKey = new PluginKey('dragable');
+
+export const Dragable = Extension.create({
+  name: 'dragable',
+
+  addProseMirrorPlugins() {
+    let editorView: EditorView;
+    let dragHandleDOM: HTMLElement;
+    let activeNode: ActiveNode;
+    let activeSelection: Selection;
+    let dragging = false;
+
+    const createDragHandleDOM = () => {
+      const dom = document.createElement('div');
+      dom.draggable = true;
+      dom.setAttribute('data-drag-handle', 'true');
+      return dom;
+    };
+
+    const showDragHandleDOM = () => {
+      dragHandleDOM.classList.add('show');
+      dragHandleDOM.classList.remove('hide');
+    };
+
+    const hideDragHandleDOM = () => {
+      dragHandleDOM.classList.remove('show');
+      dragHandleDOM.classList.add('hide');
+    };
+
+    const renderDragHandleDOM = (view: EditorView, el: HTMLElement) => {
+      const root = view.dom.parentElement;
+
+      if (!root) return;
+
+      const targetNodeRect = (<HTMLElement>el).getBoundingClientRect();
+      const rootRect = root.getBoundingClientRect();
+      const handleRect = dragHandleDOM.getBoundingClientRect();
+
+      const left = targetNodeRect.left - rootRect.left - handleRect.width - handleRect.width / 2;
+      const top = targetNodeRect.top - rootRect.top + handleRect.height / 2 + root.scrollTop;
+
+      dragHandleDOM.style.left = `${left}px`;
+      dragHandleDOM.style.top = `${top}px`;
+
+      showDragHandleDOM();
+    };
+
+    const handleMouseDown = () => {
+      if (!activeNode) return null;
+
+      if (NodeSelection.isSelectable(activeNode.node)) {
+        const nodeSelection = NodeSelection.create(editorView.state.doc, activeNode.$pos.pos - activeNode.offset);
+        editorView.dispatch(editorView.state.tr.setSelection(nodeSelection));
+        editorView.focus();
+        activeSelection = nodeSelection;
+        return nodeSelection;
+      }
+
+      return null;
+    };
+
+    const handleMouseUp = () => {
+      if (!dragging) return;
+
+      dragging = false;
+      activeSelection = null;
+    };
+
+    const handleDragStart = (event) => {
+      dragging = true;
+      if (event.dataTransfer && activeSelection) {
+        const brokenClipboardAPI = false;
+        const slice = activeSelection.content();
+        event.dataTransfer.effectAllowed = 'copyMove';
+        const { dom, text } = __serializeForClipboard(editorView, slice);
+        event.dataTransfer.clearData();
+        event.dataTransfer.setData(brokenClipboardAPI ? 'Text' : 'text/html', dom.innerHTML);
+        if (!brokenClipboardAPI) event.dataTransfer.setData('text/plain', text);
+        editorView.dragging = {
+          slice,
+          move: true,
+        };
+      }
+    };
+
+    return [
+      new Plugin({
+        key: DragablePluginKey,
+        view: (view) => {
+          if (view.editable) {
+            dragHandleDOM = createDragHandleDOM();
+            dragHandleDOM.addEventListener('mousedown', handleMouseDown);
+            dragHandleDOM.addEventListener('mouseup', handleMouseUp);
+            dragHandleDOM.addEventListener('dragstart', handleDragStart);
+            view.dom.parentNode?.appendChild(dragHandleDOM);
+          }
+
+          return {
+            update(view) {
+              editorView = view;
+            },
+            destroy: () => {
+              if (!dragHandleDOM) return;
+
+              dragHandleDOM.remove();
+            },
+          };
+        },
+        props: {
+          handleDOMEvents: {
+            drop: (view, event: DragEvent) => {
+              if (!view.editable || !dragHandleDOM) return false;
+
+              if (dragging) {
+                const tr = removePossibleTable(view, event);
+                dragging = false;
+
+                if (tr) {
+                  view.dispatch(tr);
+                  event.preventDefault();
+                  return true;
+                }
+              }
+
+              return false;
+            },
+            mousemove: (view, event) => {
+              if (!view.editable || !dragHandleDOM) return false;
+
+              const dom = event.target;
+
+              if (!(dom instanceof Element)) {
+                if (dragging) return false;
+                hideDragHandleDOM();
+                return false;
+              }
+
+              const result = selectRootNodeByDom(dom, view);
+              activeNode = result;
+
+              if (!result) {
+                if (dragging) return false;
+                hideDragHandleDOM();
+                return false;
+              }
+
+              if (result.node.type.name === 'title') {
+                if (dragging) return false;
+                hideDragHandleDOM();
+                return false;
+              }
+
+              renderDragHandleDOM(view, result.el);
+              return false;
+            },
+            keydown: () => {
+              if (!editorView.editable || !dragHandleDOM) return false;
+              dragHandleDOM.classList.remove('show');
+              hideDragHandleDOM();
+              return false;
+            },
+          },
+        },
+      }),
+    ];
+  },
+});
--- a/packages/client/src/tiptap/core/extensions/paragraph.ts
+++ b/packages/client/src/tiptap/core/extensions/paragraph.ts
@ -3,20 +3,5 @@ import TitapParagraph from '@tiptap/extension-paragraph';

 export const Paragraph = TitapParagraph.extend({
  draggable: true,
-
-  renderHTML({ HTMLAttributes }) {
-    return [
-      'p',
-      mergeAttributes(this.options.HTMLAttributes, HTMLAttributes),
-      [
-        'div',
-        {
-          'contentEditable': 'false',
-          'draggable': 'true',
-          'data-drag-handle': 'true',
-        },
-      ],
-      ['div', 0],
-    ];
-  },
+  selectable: true,
 });
--- a/packages/client/src/tiptap/core/styles/drag.scss
+++ b/packages/client/src/tiptap/core/styles/drag.scss
@ -1,91 +1,26 @@
-/* stylelint-disable */
-.ProseMirror {
-  &.is-editable {
 [data-drag-handle] {
-      position: relative;
-      display: inline;
-      opacity: 0;
-      transition: opacity 0.3s ease-out;
-      z-index: 100;
-
-      &:hover {
-        opacity: 1 !important;
-      }
-
-      &::before {
-        content: '';
  position: absolute;
-        left: -24px;
-        top: 2px;
+  z-index: 100;
+  display: inline;
  width: 16px;
  height: 16px;
-        text-align: center;
-        margin-left: auto;
  cursor: move;
+  opacity: 0;
+  transition: opacity 0.3s ease-out;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg width='16' height='16' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Crect x='3' y='1' width='3' height='3' rx='1.5' fill='%23111'/%3E%3Crect x='10' y='1' width='3' height='3' rx='1.5' fill='%23111'/%3E%3Crect x='3' y='6' width='3' height='3' rx='1.5' fill='%23111'/%3E%3Crect x='10' y='6' width='3' height='3' rx='1.5' fill='%23111'/%3E%3Crect x='3' y='11' width='3' height='3' rx='1.5' fill='%23111'/%3E%3Crect x='10' y='11' width='3' height='3' rx='1.5' fill='%23111'/%3E%3C/svg%3E");
  background-size: contain;
  background-position: center 0;
  background-repeat: no-repeat;
-        filter: var(--invert-filter);
-      }
-    }

-    p {
-      [data-drag-handle] {
-        &::before {
-          top: 6px;
-        }
-      }
+  &.show {
+    opacity: 0.3;

    &:hover {
-        [data-drag-handle] {
-          opacity: 0.3;
-        }
-      }
-    }
-
-    ul {
-      li {
-        [data-drag-handle] {
-          &::before {
-            left: -36px;
-          }
-        }
-      }
-
-      &[data-type='taskList'] {
-        li {
-          [data-drag-handle] {
-            &::before {
-              left: -46px;
-            }
-          }
-        }
-      }
-    }
-
-    ol {
-      li {
-        [data-drag-handle] {
-          &::before {
-            left: -36px;
-          }
-        }
+      opacity: 1;
    }
  }

-    .drag-container {
-      position: relative;
-
-      &:hover {
-        [data-drag-handle] {
-          opacity: 0.3;
-        }
-      }
-
-      .drag-content {
-        width: 100%;
-      }
-    }
+  &.hide {
+    opacity: 0;
  }
 }
--- a/packages/client/src/tiptap/core/styles/selection.scss
+++ b/packages/client/src/tiptap/core/styles/selection.scss
@ -1,5 +1,9 @@
 /* stylelint-disable */
 .ProseMirror {
+  p.selected-node {
+    outline: 1px solid var(--node-selected-border-color);
+  }
+
  hr.selected-node {
    &::after {
      background-color: var(--node-selected-border-color);
--- a/packages/client/src/tiptap/core/wrappers/attachment/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/attachment/index.tsx
@ -154,10 +154,5 @@ export const AttachmentWrapper = ({ editor, node, updateAttributes }) => {
    }
  })();

-  return (
-    <NodeViewWrapper className={'drag-container'}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>{content}</div>
-    </NodeViewWrapper>
-  );
+  return <NodeViewWrapper>{content}</NodeViewWrapper>;
 };
--- a/packages/client/src/tiptap/core/wrappers/callout/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/callout/index.tsx
@ -25,9 +25,7 @@ export const CalloutWrapper = ({ editor, node, updateAttributes }) => {
  );

  return (
-    <NodeViewWrapper id="js-callout-container" className={cls('drag-container', styles.wrap)}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper id="js-callout-container" className={cls(styles.wrap)}>
      <div
        className={cls(styles.innerWrap, 'render-wrapper')}
        style={{
@ -48,7 +46,6 @@ export const CalloutWrapper = ({ editor, node, updateAttributes }) => {
          }}
        />
      </div>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/code-block/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/code-block/index.tsx
@ -4,8 +4,6 @@ import { NodeViewContent, NodeViewWrapper } from '@tiptap/react';
 import cls from 'classnames';
 import { copy } from 'helpers/copy';
 import React, { useRef } from 'react';
-import { CodeBlock } from 'tiptap/core/extensions/code-block';
-import { DragableWrapper } from 'tiptap/core/wrappers/dragable';

 import styles from './index.module.scss';

@ -16,9 +14,7 @@ export const CodeBlockWrapper = ({ editor, node: { attrs }, updateAttributes, ex
  const $container = useRef<HTMLPreElement>();

  return (
-    <NodeViewWrapper className={cls('drag-container', styles.wrap, !isPrint && styles.maxHeight, 'render-wrapper')}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper className={cls(styles.wrap, !isPrint && styles.maxHeight, 'render-wrapper')}>
      <div className={styles.handleWrap}>
        <Select
          size="small"
@ -48,7 +44,6 @@ export const CodeBlockWrapper = ({ editor, node: { attrs }, updateAttributes, ex
      <pre ref={$container}>
        <NodeViewContent as="code" />
      </pre>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/countdown/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/countdown/index.tsx
@ -32,14 +32,11 @@ export const CountdownWrapper = ({ editor, node }) => {
  const { title, date } = node.attrs;

  return (
-    <NodeViewWrapper className={'drag-container'}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper>
      <div className={cls(styles.wrap, 'render-wrapper')}>
        <Text>{title}</Text>
        <ReactCountdown date={date} renderer={renderer}></ReactCountdown>
      </div>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/document-children/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/document-children/index.tsx
@ -35,9 +35,10 @@ export const DocumentChildrenWrapper = ({ editor, node, updateAttributes }) => {
  }, [node.attrs, wikiId, documentId, updateAttributes]);

  return (
-    <NodeViewWrapper as="div" className={cls('drag-container', 'render-wrapper')}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={cls('drag-content', styles.wrap, isEditable && styles.isEditable, 'documentChildren')}>
+    <NodeViewWrapper
+      as="div"
+      className={cls('render-wrapper', styles.wrap, isEditable && styles.isEditable, 'documentChildren')}
+    >
      <div>
        <Text type="tertiary">子文档</Text>
      </div>
@ -76,7 +77,6 @@ export const DocumentChildrenWrapper = ({ editor, node, updateAttributes }) => {
      ) : (
        <Text type="tertiary">当前页面无法使用子文档</Text>
      )}
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/document-reference/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/document-reference/index.tsx
@ -50,9 +50,8 @@ export const DocumentReferenceWrapper = ({ editor, node, updateAttributes }) =>
  }, [organizationId, wikiId, documentId, isEditable, isShare, title]);

  return (
-    <NodeViewWrapper as="div" className={cls('drag-container', styles.wrap, isEditable && 'render-wrapper')}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>{content}</div>
+    <NodeViewWrapper as="div" className={cls(styles.wrap, isEditable && 'render-wrapper')}>
+      {content}
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/flow/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/flow/index.tsx
@ -95,9 +95,7 @@ export const FlowWrapper = ({ editor, node, updateAttributes }) => {
  }, [toggleLoading, data]);

  return (
-    <NodeViewWrapper className={cls('drag-container', isActive && styles.isActive)}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={cls('drag-content', styles.wrap)}>
+    <NodeViewWrapper className={cls(styles.wrap, isActive && styles.isActive)}>
      <VisibilitySensor onChange={onViewportChange}>
        <Resizeable isEditable={isEditable} width={width} height={height} maxWidth={maxWidth} onChangeEnd={onResize}>
          <div
@ -136,7 +134,6 @@ export const FlowWrapper = ({ editor, node, updateAttributes }) => {
          </div>
        </Resizeable>
      </VisibilitySensor>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/iframe/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/iframe/index.tsx
@ -22,9 +22,7 @@ export const IframeWrapper = ({ editor, node, updateAttributes }) => {
  );

  return (
-    <NodeViewWrapper className={'drag-container'}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper>
      <Resizeable width={width} maxWidth={maxWidth} height={height} isEditable={isEditable} onChangeEnd={onResize}>
        <div className={cls(styles.wrap, 'render-wrapper')}>
          {url ? (
@ -38,7 +36,6 @@ export const IframeWrapper = ({ editor, node, updateAttributes }) => {
          )}
        </div>
      </Resizeable>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/image/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/image/index.tsx
@ -69,9 +69,7 @@ export const ImageWrapper = ({ editor, node, updateAttributes }) => {
  }, [src, hasTrigger, selectFile, updateAttributes]);

  return (
-    <NodeViewWrapper className={'drag-container'} style={{ textAlign, fontSize: 0, maxWidth: '100%' }}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper style={{ textAlign, fontSize: 0, maxWidth: '100%' }}>
      <Resizeable
        className={'render-wrapper'}
        width={width || maxWidth}
@ -95,7 +93,6 @@ export const ImageWrapper = ({ editor, node, updateAttributes }) => {
          <LazyLoadImage src={src} alt={alt} width={width} height={height} />
        )}
      </Resizeable>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/katex/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/katex/index.tsx
@ -35,15 +35,12 @@ export const KatexWrapper = ({ node, editor }) => {

  return (
    <NodeViewWrapper
-      className={'drag-container render-wrapper'}
+      className={'render-wrapper'}
      style={{
        backgroundColor,
      }}
    >
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
      <div className={styles.wrap}>{content}</div>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/core/wrappers/mind/index.tsx
+++ b/packages/client/src/tiptap/core/wrappers/mind/index.tsx
@ -108,9 +108,7 @@ export const MindWrapper = ({ editor, node, updateAttributes }) => {
  }, [width, height, setCenter]);

  return (
-    <NodeViewWrapper className={cls('drag-container', styles.wrap, isActive && styles.isActive)}>
-      <div className={'drag-handle'} contentEditable="false" draggable="true" data-drag-handle />
-      <div className={'drag-content'}>
+    <NodeViewWrapper className={cls(styles.wrap, isActive && styles.isActive)}>
      <VisibilitySensor onChange={onViewportChange}>
        <Resizeable isEditable={isEditable} width={width} height={height} maxWidth={maxWidth} onChangeEnd={onResize}>
          <div
@ -140,13 +138,7 @@ export const MindWrapper = ({ editor, node, updateAttributes }) => {

            <div className={styles.mindHandlerWrap}>
              <Tooltip content="居中">
-                  <Button
-                    size="small"
-                    theme="borderless"
-                    type="tertiary"
-                    icon={<IconMindCenter />}
-                    onClick={setCenter}
-                  />
+                <Button size="small" theme="borderless" type="tertiary" icon={<IconMindCenter />} onClick={setCenter} />
              </Tooltip>
              <Tooltip content="缩小">
                <Button
@ -170,7 +162,6 @@ export const MindWrapper = ({ editor, node, updateAttributes }) => {
          </div>
        </Resizeable>
      </VisibilitySensor>
-      </div>
    </NodeViewWrapper>
  );
 };
--- a/packages/client/src/tiptap/editor/collaboration/kit.ts
+++ b/packages/client/src/tiptap/editor/collaboration/kit.ts
@ -16,6 +16,7 @@ import { Countdown } from 'tiptap/core/extensions/countdown';
 import { Document } from 'tiptap/core/extensions/document';
 import { DocumentChildren } from 'tiptap/core/extensions/document-children';
 import { DocumentReference } from 'tiptap/core/extensions/document-reference';
+import { Dragable } from 'tiptap/core/extensions/dragable';
 import { Dropcursor } from 'tiptap/core/extensions/dropcursor';
 import { Emoji } from 'tiptap/core/extensions/emoji';
 import { EventEmitter } from 'tiptap/core/extensions/event-emitter';
@ -156,4 +157,5 @@ export const CollaborationKit = [
  }),
  Title,
  DocumentWithTitle,
+  Dragable,
 ];
--- a/packages/client/src/tiptap/prose-utils/index.ts
+++ b/packages/client/src/tiptap/prose-utils/index.ts
@ -18,6 +18,7 @@ export * from './markdown-source-map';
 export * from './mention';
 export * from './node';
 export * from './position';
+export * from './select-node-by-dom';
 export * from './table';
 export * from './text';
 export * from './type';
--- a/packages/client/src/tiptap/prose-utils/select-node-by-dom.ts
+++ b/packages/client/src/tiptap/prose-utils/select-node-by-dom.ts
@ -0,0 +1,87 @@
+import { Node, ResolvedPos } from 'prosemirror-model';
+import { EditorView } from 'prosemirror-view';
+
+export type ActiveNode = Readonly<{
+  $pos: ResolvedPos;
+  node: Node;
+  el: HTMLElement;
+  offset: number;
+}>;
+
+const nodeIsNotBlock = (node: Node) => !node.type.isBlock;
+
+const nodeIsFirstChild = (pos: ResolvedPos) => {
+  let parent = pos.parent;
+  const node = pos.node();
+
+  if (parent === node) {
+    parent = pos.node(pos.depth - 1);
+  }
+  if (!parent || parent.type.name === 'doc') return false;
+
+  return parent.firstChild === node;
+};
+
+const getDOMByPos = (view: EditorView, root: HTMLElement, $pos: ResolvedPos) => {
+  const { node } = view.domAtPos($pos.pos);
+
+  let el: HTMLElement = node as HTMLElement;
+  let parent = el.parentElement;
+  while (parent && parent !== root && $pos.pos === view.posAtDOM(parent, 0)) {
+    el = parent;
+    parent = parent.parentElement;
+  }
+
+  return el;
+};
+
+export const selectRootNodeByDom = (dom: Element, view: EditorView): ActiveNode | null => {
+  const root = view.dom.parentElement;
+
+  if (!root) return null;
+
+  let pos = view.posAtDOM(dom, 0);
+
+  /**
+   * img 节点修正
+   */
+  if (dom.tagName === 'IMG') {
+    pos -= 1;
+  }
+
+  if (pos === 0) return null;
+
+  let $pos = view.state.doc.resolve(pos);
+  let node = $pos.node();
+
+  /**
+   * 自定义节点修正
+   */
+  if (node.type.name === 'doc') {
+    const nodeAtPos = view.state.doc.nodeAt(pos);
+
+    if (nodeAtPos && nodeAtPos.type.name !== 'doc' && nodeAtPos.type.name !== 'text') {
+      node = nodeAtPos;
+      $pos = view.state.doc.resolve(pos);
+      const el = view.nodeDOM(pos);
+      return { node, $pos, el, offset: 0 };
+    }
+  }
+
+  while (node && (nodeIsNotBlock(node) || nodeIsFirstChild($pos))) {
+    $pos = view.state.doc.resolve($pos.before());
+    node = $pos.node();
+  }
+
+  if (node.type.name.includes('table')) {
+    while (node.type.name !== 'table') {
+      $pos = view.state.doc.resolve($pos.before());
+      node = $pos.node();
+    }
+  }
+
+  $pos = view.state.doc.resolve($pos.pos - $pos.parentOffset);
+  const el = getDOMByPos(view, root, $pos);
+
+  return { node, $pos, el, offset: 1 };
+};
--- a/packages/client/src/tiptap/prose-utils/table.ts
+++ b/packages/client/src/tiptap/prose-utils/table.ts
@ -2,6 +2,7 @@ import { findParentNode } from '@tiptap/core';
 import { Node, ResolvedPos } from 'prosemirror-model';
 import { Selection, Transaction } from 'prosemirror-state';
 import { CellSelection, TableMap } from 'prosemirror-tables';
+import { EditorView } from 'prosemirror-view';

 export const isRectSelected = (rect: any) => (selection: CellSelection) => {
  const map = TableMap.get(selection.$anchorCell.node(-1));
@ -220,3 +221,62 @@ export const selectTable = (tr: Transaction) => {
  }
  return tr;
 };
+
+function dropPoint(doc, pos, slice) {
+  const $pos = doc.resolve(pos);
+  if (!slice.content.size) {
+    return pos;
+  }
+  let content = slice.content;
+  for (let i = 0; i < slice.openStart; i++) {
+    content = content.firstChild.content;
+  }
+  for (let pass = 1; pass <= (slice.openStart == 0 && slice.size ? 2 : 1); pass++) {
+    for (let d = $pos.depth; d >= 0; d--) {
+      const bias = d == $pos.depth ? 0 : $pos.pos <= ($pos.start(d + 1) + $pos.end(d + 1)) / 2 ? -1 : 1;
+      const insertPos = $pos.index(d) + (bias > 0 ? 1 : 0);
+      const parent = $pos.node(d);
+      let fits = false;
+      if (pass == 1) {
+        fits = parent.canReplace(insertPos, insertPos, content);
+      } else {
+        const wrapping = parent.contentMatchAt(insertPos).findWrapping(content.firstChild.type);
+        fits = wrapping && parent.canReplaceWith(insertPos, insertPos, wrapping[0]);
+      }
+      if (fits) {
+        return bias == 0 ? $pos.pos : bias < 0 ? $pos.before(d + 1) : $pos.after(d + 1);
+      }
+    }
+  }
+  return null;
+}
+
+export const removePossibleTable = (view: EditorView, event: DragEvent): Transaction | null => {
+  const { state } = view;
+
+  const $pos = state.selection.$anchor;
+  for (let d = $pos.depth; d > 0; d--) {
+    const node = $pos.node(d);
+    if (node.type.spec['tableRole'] == 'table') {
+      const eventPos = view.posAtCoords({ left: event.clientX, top: event.clientY });
+      if (!eventPos) return null;
+      const slice = view.dragging?.slice;
+      if (!slice) return null;
+
+      const $mouse = view.state.doc.resolve(eventPos.pos);
+      const insertPos = dropPoint(view.state.doc, $mouse.pos, slice);
+      if (!insertPos) return null;
+
+      let tr = state.tr;
+      tr = tr.delete($pos.before(d), $pos.after(d));
+
+      const pos = tr.mapping.map(insertPos);
+
+      tr = tr.replaceRange(pos, pos, slice).scrollIntoView();
+
+      return tr;
+    }
+  }
+
+  return null;
+};