Only activate ink editor if none is selected

src/display/editor/annotation_editor_layer.js

@@ -113,7 +113,11 @@ class AnnotationEditorLayer {
    * @param {MouseEvent} event
    */
   mouseover(event) {
-    if (event.target === this.div && event.buttons === 0) {
+    if (
+      event.target === this.div &&
+      event.buttons === 0 &&
+      !this.#uiManager.hasActive()
+    ) {
       // The div is the target so there is no ink editor, hence we can
       // create a new one.
       // event.buttons === 0 is here to avoid adding a new ink editor

src/display/editor/tools.js

@@ -570,6 +570,14 @@ class AnnotationEditorUIManager {
     return this.#activeEditor;
   }
 
+  /**
+   * Check if there is an active editor.
+   * @returns {boolean}
+   */
+  hasActive() {
+    return this.#activeEditor !== null;
+  }
+
   /**
    * Get the current editor mode.
    * @returns {number}