Expose getStyleForNextShape (#3039)

This PR exposes a method for getting the style for the next shape.

### Change Type

- [x] `patch` — Bug fix

### Release Notes

- Expose the API for `Editor.getStyleForNextShape`, previously marked as
internal.

packages/editor/api-report.md

@@ -764,7 +764,6 @@ export class Editor extends EventEmitter<TLEventMap> {
     getSharedStyles(): ReadonlySharedStyleMap;
     getSortedChildIdsForParent(parent: TLPage | TLParentId | TLShape): TLShapeId[];
     getStateDescendant<T extends StateNode>(path: string): T | undefined;
-    // @internal (undocumented)
     getStyleForNextShape<T>(style: StyleProp<T>): T;
     getSvg(shapes: TLShape[] | TLShapeId[], opts?: Partial<TLSvgOptions>): Promise<SVGSVGElement | undefined>;
     getViewportPageBounds(): Box;

packages/editor/api/api.json

@@ -13815,6 +13815,72 @@
               "isAbstract": false,
               "name": "getStateDescendant"
             },
+            {
+              "kind": "Method",
+              "canonicalReference": "@tldraw/editor!Editor#getStyleForNextShape:member(1)",
+              "docComment": "/**\n * Get the style for the next shape.\n *\n * @param style - The style to get.\n *\n * @example\n * ```ts\n * const color = editor.getStyleForNextShape(DefaultColorStyle)\n * ```\n *\n * @public\n */\n",
+              "excerptTokens": [
+                {
+                  "kind": "Content",
+                  "text": "getStyleForNextShape<T>(style: "
+                },
+                {
+                  "kind": "Reference",
+                  "text": "StyleProp",
+                  "canonicalReference": "@tldraw/tlschema!StyleProp:class"
+                },
+                {
+                  "kind": "Content",
+                  "text": "<T>"
+                },
+                {
+                  "kind": "Content",
+                  "text": "): "
+                },
+                {
+                  "kind": "Content",
+                  "text": "T"
+                },
+                {
+                  "kind": "Content",
+                  "text": ";"
+                }
+              ],
+              "typeParameters": [
+                {
+                  "typeParameterName": "T",
+                  "constraintTokenRange": {
+                    "startIndex": 0,
+                    "endIndex": 0
+                  },
+                  "defaultTypeTokenRange": {
+                    "startIndex": 0,
+                    "endIndex": 0
+                  }
+                }
+              ],
+              "isStatic": false,
+              "returnTypeTokenRange": {
+                "startIndex": 4,
+                "endIndex": 5
+              },
+              "releaseTag": "Public",
+              "isProtected": false,
+              "overloadIndex": 1,
+              "parameters": [
+                {
+                  "parameterName": "style",
+                  "parameterTypeTokenRange": {
+                    "startIndex": 1,
+                    "endIndex": 3
+                  },
+                  "isOptional": false
+                }
+              ],
+              "isOptional": false,
+              "isAbstract": false,
+              "name": "getStyleForNextShape"
+            },
             {
               "kind": "Method",
               "canonicalReference": "@tldraw/editor!Editor#getSvg:member(1)",

packages/editor/src/lib/editor/Editor.ts

@@ -7196,7 +7196,17 @@ export class Editor extends EventEmitter<TLEventMap> {
 		return sharedStyles
 	}
 
-	/** @internal */
+	/**
+	 * Get the style for the next shape.
+	 *
+	 * @example
+	 * ```ts
+	 * const color = editor.getStyleForNextShape(DefaultColorStyle)
+	 * ```
+	 *
+	 * @param style - The style to get.
+	 *
+	 * @public */
 	getStyleForNextShape<T>(style: StyleProp<T>): T {
 		const value = this.getInstanceState().stylesForNextShape[style.id]
 		return value === undefined ? style.defaultValue : (value as T)