fix(edgeless): mindmap refine

packages/blocks/src/root-block/edgeless/edgeless-keyboard.ts

@@ -2,8 +2,11 @@ import { IS_MAC } from '@blocksuite/global/env';
 
 import { type EdgelessTool, LassoMode } from '../../_common/types.js';
 import { matchFlavours } from '../../_common/utils/model.js';
-import type { MindmapElementModel } from '../../surface-block/element-model/mindmap.js';
-import type { ShapeElementModel } from '../../surface-block/index.js';
+import { MindmapElementModel } from '../../surface-block/element-model/mindmap.js';
+import type {
+  ElementModel,
+  ShapeElementModel,
+} from '../../surface-block/index.js';
 import {
   Bound,
   ConnectorElementModel,
@@ -471,6 +474,44 @@ export class EdgelessPageKeyboardManager extends PageKeyboardManager {
 
     const { elements } = edgeless.service.selection;
     const inc = shift ? 10 : 1;
+    const mindmapNodes = elements.filter(
+      el => el.group instanceof MindmapElementModel
+    );
+
+    if (mindmapNodes.length > 0) {
+      const node = mindmapNodes[0];
+      const mindmap = node.group as MindmapElementModel;
+      let targetNode: ElementModel | null = null;
+
+      switch (key) {
+        case 'ArrowUp':
+        case 'ArrowDown':
+          targetNode = mindmap.getSiblingNode(
+            node.id,
+            key === 'ArrowDown' ? 'next' : 'prev'
+          );
+          break;
+        case 'ArrowLeft':
+          targetNode = mindmap.getParentNode(node.id);
+          break;
+        case 'ArrowRight':
+          {
+            const children = mindmap.getChildNodes(node.id);
+
+            targetNode = children[0] ?? null;
+          }
+          break;
+      }
+
+      if (targetNode) {
+        edgeless.service.selection.set({
+          elements: [targetNode.id],
+          editing: false,
+        });
+      }
+
+      return;
+    }
 
     elements.forEach(element => {
       const bound = Bound.deserialize(element.xywh).clone();

packages/blocks/src/root-block/widgets/element-toolbar/change-mindmap-button.ts

@@ -126,7 +126,7 @@ export class EdgelessChangeMindmapButton extends WithDisposable(LitElement) {
     return html`<div class="edgeless-change-mindmap-button">
       <edgeless-tool-icon-button
         class="mindmap-style-button"
-        .tooltip=${this._showStylePopper ? '' : 'Mindmap Style'}
+        .tooltip=${this._showStylePopper ? '' : 'Style'}
         .tipPosition=${'bottom'}
         .active=${false}
         @click=${() => {
@@ -153,7 +153,7 @@ export class EdgelessChangeMindmapButton extends WithDisposable(LitElement) {
 
       <edgeless-tool-icon-button
         class="mindmap-layout-button"
-        .tooltip=${this._showLayoutPopper ? '' : 'Mindmap Layout'}
+        .tooltip=${this._showLayoutPopper ? '' : 'Layout'}
         .tipPosition=${'bottom'}
         .active=${false}
         @click=${() => {
@@ -276,9 +276,9 @@ class EdgelessChangeMindmapLayoutPanel extends LitElement {
   `;
 
   static mindmapLayouts = [
-    [LayoutType.LEFT, MindmapLeftLayoutIcon, 'Left layout'],
-    [LayoutType.RIGHT, MindmapRightLayoutIcon, 'Right layout'],
-    [LayoutType.BALANCE, MindmapBalanceLayoutIcon, 'Balance layout'],
+    [LayoutType.LEFT, MindmapLeftLayoutIcon, 'Left'],
+    [LayoutType.RIGHT, MindmapRightLayoutIcon, 'Right'],
+    [LayoutType.BALANCE, MindmapBalanceLayoutIcon, 'Radial'],
   ];
 
   @property({ attribute: false })

packages/blocks/src/surface-block/element-model/mindmap.ts

@@ -261,6 +261,18 @@ export class MindmapElementModel extends GroupLikeModel<MindmapElementProps> {
     return node?.parent ? this.surface.getElementById(node.parent) : null;
   }
 
+  /**
+   * Path is an array of indexes that represent the path from the root node to the target node.
+   * The first element of the array is always 0, which represents the root node.
+   * @param element
+   * @returns
+   *
+   * @example
+   * ```ts
+   * const path = mindmap.getPath('nodeId');
+   * // [0, 1, 2]
+   * ```
+   */
   getPath(element: string | MindmapNode) {
     let node = this._nodeMap.get(
       typeof element === 'string' ? element : element.id
@@ -563,4 +575,38 @@ export class MindmapElementModel extends GroupLikeModel<MindmapElementProps> {
       });
     });
   }
+
+  getSiblingNode(id: string, direction: 'prev' | 'next' = 'next') {
+    const node = this._nodeMap.get(id);
+
+    if (!node) {
+      return null;
+    }
+
+    const parent = this._nodeMap.get(node.detail.parent!);
+
+    if (!parent) {
+      return null;
+    }
+
+    const idx = parent.children.indexOf(node);
+    if (idx === -1) {
+      return null;
+    }
+
+    return (
+      parent?.children[direction === 'next' ? idx + 1 : idx - 1]?.element ??
+      null
+    );
+  }
+
+  getChildNodes(id: string) {
+    const node = this._nodeMap.get(id);
+
+    if (!node) {
+      return [];
+    }
+
+    return node.children.map(child => child.element);
+  }
 }

packages/blocks/src/surface-block/utils/math-utils.ts

@@ -148,7 +148,7 @@ export function getBoundsFromPoints(points: IVec[], rotation = 0): TLBounds {
   let maxX = -Infinity;
   let maxY = -Infinity;
 
-  if (points.length < 2) {
+  if (points.length < 1) {
     minX = 0;
     minY = 0;
     maxX = 1;