feat: new useBlockRender API

libs/components/editor-core/src/render-block/Context.tsx

@@ -0,0 +1,32 @@
+import { genErrorObj } from '@toeverything/utils';
+import { createContext, PropsWithChildren, useContext } from 'react';
+import { RenderBlockProps } from './RenderBlock';
+
+type BlockRenderProps = {
+    blockRender: (args: RenderBlockProps) => JSX.Element | null;
+};
+
+export const BlockRenderContext = createContext<BlockRenderProps>(
+    genErrorObj(
+        'Failed to get BlockChildrenContext! The context only can use under the "render-root"'
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    ) as any
+);
+
+export const BlockRenderProvider = ({
+    blockRender,
+    children,
+}: PropsWithChildren<BlockRenderProps>) => {
+    return (
+        <BlockRenderContext.Provider value={{ blockRender }}>
+            {children}
+        </BlockRenderContext.Provider>
+    );
+};
+
+export const useBlockRender = () => {
+    const { blockRender } = useContext(BlockRenderContext);
+    return {
+        BlockRender: blockRender,
+    };
+};

libs/components/editor-core/src/render-block/RenderBlock.tsx

@@ -4,7 +4,12 @@ import { useCallback, useMemo } from 'react';
 import { useEditor } from '../Contexts';
 import { useBlock } from '../hooks';
 
-interface RenderBlockProps {
+/**
+ * Render nothing
+ */
+export const NullBlockRender = (): null => null;
+
+export interface RenderBlockProps {
     blockId: string;
     hasContainer?: boolean;
 }
@@ -29,7 +34,7 @@ export function RenderBlock({
         if (block?.type) {
             return editor.getView(block.type).View;
         }
-        return () => null;
+        return (): null => null;
     }, [editor, block?.type]);
 
     if (!block) {

libs/components/editor-core/src/render-block/RenderBlockChildren.tsx

@@ -1,16 +1,39 @@
+import { styled } from '@toeverything/components/ui';
 import type { AsyncBlock } from '../editor';
-import { RenderBlock } from './RenderBlock';
+import { useBlockRender } from './Context';
+import { NullBlockRender } from './RenderBlock';
 
-interface RenderChildrenProps {
+export interface RenderChildrenProps {
     block: AsyncBlock;
+    indent?: boolean;
+}
+
+export const RenderBlockChildren = ({
+    block,
+    indent = true,
+}: RenderChildrenProps) => {
+    const { BlockRender } = useBlockRender();
+    if (BlockRender === NullBlockRender) {
+        return null;
     }
 
-export const RenderBlockChildren = ({ block }: RenderChildrenProps) => {
     return block.childrenIds.length ? (
-        <>
+        <StyledIdentWrapper indent={indent}>
             {block.childrenIds.map(childId => {
-                return <RenderBlock key={childId} blockId={childId} />;
+                return <BlockRender key={childId} blockId={childId} />;
             })}
-        </>
+        </StyledIdentWrapper>
     ) : null;
 };
+
+/**
+ * Indent rendering child nodes
+ */
+const StyledIdentWrapper = styled('div')<{ indent?: boolean }>(
+    ({ indent }) => ({
+        display: 'flex',
+        flexDirection: 'column',
+        // TODO: marginLeft should use theme provided by styled
+        ...(indent && { marginLeft: '30px' }),
+    })
+);

libs/components/editor-core/src/render-block/RenderKanbanBlock.tsx

@@ -0,0 +1,56 @@
+import { styled } from '@toeverything/components/ui';
+import { useBlock } from '../hooks';
+import { BlockRenderProvider } from './Context';
+import { NullBlockRender, RenderBlock, RenderBlockProps } from './RenderBlock';
+
+/**
+ * Render block without children.
+ */
+const BlockWithoutChildrenRender = ({ blockId }: RenderBlockProps) => {
+    return (
+        <BlockRenderProvider blockRender={NullBlockRender}>
+            <RenderBlock blockId={blockId} />
+        </BlockRenderProvider>
+    );
+};
+
+/**
+ * Render a block, but only one level of children.
+ */
+const OneLevelBlockRender = ({ blockId }: RenderBlockProps) => {
+    return (
+        <BlockRenderProvider blockRender={BlockWithoutChildrenRender}>
+            <RenderBlock blockId={blockId} />
+        </BlockRenderProvider>
+    );
+};
+
+export const KanbanBlockRender = ({ blockId }: RenderBlockProps) => {
+    const { block } = useBlock(blockId);
+
+    if (!block) {
+        return (
+            <BlockRenderProvider blockRender={NullBlockRender}>
+                <RenderBlock blockId={blockId} />
+            </BlockRenderProvider>
+        );
+    }
+
+    return (
+        <BlockRenderProvider blockRender={NullBlockRender}>
+            <RenderBlock blockId={blockId} />
+            {block?.childrenIds.map(childId => (
+                <StyledBorder key={childId}>
+                    <RenderBlock blockId={childId} />
+                </StyledBorder>
+            ))}
+        </BlockRenderProvider>
+    );
+};
+
+const StyledBorder = styled('div')({
+    border: '1px solid #E0E6EB',
+    borderRadius: '5px',
+    margin: '4px',
+    padding: '0 4px',
+});

libs/components/editor-core/src/render-block/WithTreeViewChildren.tsx

@@ -0,0 +1,181 @@
+import { styled } from '@toeverything/components/ui';
+import type {
+    ComponentPropsWithoutRef,
+    ComponentPropsWithRef,
+    CSSProperties,
+    ReactElement,
+} from 'react';
+import { forwardRef } from 'react';
+import { CreateView } from '../editor';
+import { useBlockRender } from './Context';
+import { NullBlockRender } from './RenderBlock';
+
+type WithChildrenConfig = {
+    indent: CSSProperties['marginLeft'];
+};
+
+const defaultConfig: WithChildrenConfig = {
+    indent: '30px',
+};
+
+const TreeView = forwardRef<
+    HTMLDivElement,
+    { lastItem?: boolean } & ComponentPropsWithRef<'div'>
+>(({ lastItem = false, children, onClick, ...restProps }, ref) => {
+    return (
+        <TreeWrapper ref={ref} {...restProps}>
+            <StyledTreeView>
+                <VerticalLine last={lastItem} onClick={onClick} />
+                <HorizontalLine last={lastItem} onClick={onClick} />
+                {lastItem && <LastItemRadius />}
+            </StyledTreeView>
+            {/* maybe need a child wrapper */}
+            {children}
+        </TreeWrapper>
+    );
+});
+
+const CollapsedNode = forwardRef<
+    HTMLDivElement,
+    ComponentPropsWithoutRef<'div'>
+>((props, ref) => {
+    return (
+        <TreeView ref={ref} lastItem={true} {...props}>
+            <Collapsed onClick={props.onClick}>···</Collapsed>
+        </TreeView>
+    );
+});
+
+/**
+ * Indent rendering child nodes
+ */
+export const withTreeViewChildren = (
+    creator: (props: CreateView) => ReactElement,
+    customConfig: Partial<WithChildrenConfig> = {}
+) => {
+    const config = {
+        ...defaultConfig,
+        ...customConfig,
+    };
+
+    return (props: CreateView) => {
+        const { block } = props;
+        const { BlockRender } = useBlockRender();
+        const collapsed = block.getProperty('collapsed')?.value;
+        const childrenIds = block.childrenIds;
+        const showChildren =
+            !collapsed &&
+            childrenIds.length > 0 &&
+            BlockRender !== NullBlockRender;
+
+        const handleCollapse = () => {
+            block.setProperty('collapsed', { value: true });
+        };
+
+        const handleExpand = () => {
+            block.setProperty('collapsed', { value: false });
+        };
+
+        return (
+            <>
+                {creator(props)}
+
+                {collapsed && (
+                    <CollapsedNode
+                        onClick={handleExpand}
+                        style={{ marginLeft: config.indent }}
+                    />
+                )}
+                {showChildren &&
+                    childrenIds.map((childId, idx) => {
+                        return (
+                            <TreeView
+                                key={childId}
+                                lastItem={idx === childrenIds.length - 1}
+                                onClick={handleCollapse}
+                                style={{ marginLeft: config.indent }}
+                            >
+                                <BlockRender key={childId} blockId={childId} />
+                            </TreeView>
+                        );
+                    })}
+            </>
+        );
+    };
+};
+
+const TREE_COLOR = '#D5DFE6';
+// adjust left and right margins of the the tree line
+const TREE_LINE_LEFT_OFFSET = '-16px';
+// determine the position of the horizontal line by the type of the item
+const TREE_LINE_TOP_OFFSET = '20px'; // '50%'
+const TREE_LINE_WIDTH = '12px';
+
+const TreeWrapper = styled('div')({
+    position: 'relative',
+    display: 'flex',
+});
+
+const StyledTreeView = styled('div')({
+    position: 'absolute',
+    left: TREE_LINE_LEFT_OFFSET,
+    height: '100%',
+});
+
+const Line = styled('div')({
+    position: 'absolute',
+    cursor: 'pointer',
+    backgroundColor: TREE_COLOR,
+    // somehow tldraw would override this
+    boxSizing: 'content-box!important' as any,
+    // See [Can I add background color only for padding?](https://stackoverflow.com/questions/14628601/can-i-add-background-color-only-for-padding)
+    backgroundClip: 'content-box',
+    backgroundOrigin: 'content-box',
+    // Increase click hot spot
+    padding: '10px',
+});
+
+const VerticalLine = styled(Line)<{ last: boolean }>(({ last }) => ({
+    width: '1px',
+    height: last ? TREE_LINE_TOP_OFFSET : '100%',
+    paddingTop: 0,
+    paddingBottom: 0,
+    transform: 'translate(-50%, 0)',
+
+    opacity: last ? 0 : 'unset',
+}));
+
+const HorizontalLine = styled(Line)<{ last: boolean }>(({ last }) => ({
+    width: TREE_LINE_WIDTH,
+    height: '1px',
+    paddingLeft: 0,
+    paddingRight: 0,
+    top: TREE_LINE_TOP_OFFSET,
+    transform: 'translate(0, -50%)',
+    opacity: last ? 0 : 'unset',
+}));
+
+const Collapsed = styled('div')({
+    cursor: 'pointer',
+    display: 'inline-block',
+    color: '#98ACBD',
+    padding: '8px',
+});
+
+const LastItemRadius = styled('div')({
+    boxSizing: 'content-box',
+    position: 'absolute',
+    left: '-0.5px',
+    top: 0,
+    height: TREE_LINE_TOP_OFFSET,
+    bottom: '50%',
+    width: TREE_LINE_WIDTH,
+    borderWidth: '1px',
+    borderStyle: 'solid',
+    borderLeftColor: TREE_COLOR,
+    borderBottomColor: TREE_COLOR,
+    borderTop: 'none',
+    borderRight: 'none',
+    borderRadius: '0 0 0 3px',
+    pointerEvents: 'none',
+});

libs/components/editor-core/src/render-block/index.ts

@@ -1,2 +1,4 @@
+export { BlockRenderProvider, useBlockRender } from './Context';
 export * from './RenderBlock';
 export * from './RenderBlockChildren';
+export { withTreeViewChildren } from './WithTreeViewChildren';