feat: support unbinding bound text (#4686)

* feat: support unbinding text

* fix unbound text

* move the unbind option next to group action

* use boundTextElement.id when unbinding

* update original text so it takes same bounding box when unbind

* Add spec

* recompute measurements when unbinding

src/actions/actionUnbindText.tsx

@@ -0,0 +1,44 @@
+import { getNonDeletedElements } from "../element";
+import { mutateElement } from "../element/mutateElement";
+import { getBoundTextElement, measureText } from "../element/textElement";
+import { ExcalidrawTextElement } from "../element/types";
+import { getSelectedElements } from "../scene";
+import { getFontString } from "../utils";
+import { register } from "./register";
+
+export const actionUnbindText = register({
+  name: "unbindText",
+  contextItemLabel: "labels.unbindText",
+  perform: (elements, appState) => {
+    const selectedElements = getSelectedElements(
+      getNonDeletedElements(elements),
+      appState,
+    );
+    selectedElements.forEach((element) => {
+      const boundTextElement = getBoundTextElement(element);
+      if (boundTextElement) {
+        const { width, height, baseline } = measureText(
+          boundTextElement.originalText,
+          getFontString(boundTextElement),
+        );
+        mutateElement(boundTextElement as ExcalidrawTextElement, {
+          containerId: null,
+          width,
+          height,
+          baseline,
+          text: boundTextElement.originalText,
+        });
+        mutateElement(element, {
+          boundElements: element.boundElements?.filter(
+            (ele) => ele.id !== boundTextElement.id,
+          ),
+        });
+      }
+    });
+    return {
+      elements,
+      appState,
+      commitToHistory: true,
+    };
+  },
+});

src/actions/index.ts

@@ -80,3 +80,4 @@ export { actionToggleGridMode } from "./actionToggleGridMode";
 export { actionToggleZenMode } from "./actionToggleZenMode";
 
 export { actionToggleStats } from "./actionToggleStats";
+export { actionUnbindText } from "./actionUnbindText";

src/actions/types.ts

@@ -103,7 +103,8 @@ export type ActionName =
   | "exportWithDarkMode"
   | "toggleTheme"
   | "increaseFontSize"
-  | "decreaseFontSize";
+  | "decreaseFontSize"
+  | "unbindText";
 
 export type PanelComponentProps = {
   elements: readonly ExcalidrawElement[];