Update how orphan state is observed

ext/fg/js/float.js

@@ -27,17 +27,24 @@ class DisplayFloat extends Display {
             url: window.location.href
         };
 
+        this._orphaned = false;
+
+        yomichan.on('orphaned', () => this.onOrphaned());
         window.addEventListener('message', (e) => this.onMessage(e), false);
     }
 
     onError(error) {
-        if (window.yomichan_orphaned) {
+        if (this._orphaned) {
             this.setContentOrphaned();
         } else {
             logError(error, true);
         }
     }
 
+    onOrphaned() {
+        this._orphaned = true;
+    }
+
     onSearchClear() {
         window.parent.postMessage('popupClose', '*');
     }

ext/fg/js/frontend.js

@@ -37,6 +37,7 @@ class Frontend extends TextScanner {
         this.isPreparedPromiseResolve = null;
         this.isPreparedPromise = new Promise((resolve) => { this.isPreparedPromiseResolve = resolve; });
 
+        this._orphaned = true;
         this._lastShowPromise = Promise.resolve();
     }
 
@@ -54,6 +55,7 @@ class Frontend extends TextScanner {
         try {
             await this.updateOptions();
 
+            yomichan.on('orphaned', () => this.onOrphaned());
             yomichan.on('optionsUpdate', () => this.updateOptions());
             chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
             this.isPreparedPromiseResolve();
@@ -93,6 +95,10 @@ class Frontend extends TextScanner {
         return false;
     }
 
+    onOrphaned() {
+        this._orphaned = true;
+    }
+
     getMouseEventListeners() {
         return [
             ...super.getMouseEventListeners(),
@@ -122,7 +128,7 @@ class Frontend extends TextScanner {
                 }
             }
         } catch (e) {
-            if (window.yomichan_orphaned) {
+            if (this._orphaned) {
                 if (textSource !== null && this.options.scanning.modifier !== 'none') {
                     this._lastShowPromise = this.popup.showContent(
                         textSource.getRect(),

ext/mixed/js/api.js

@@ -115,8 +115,8 @@ function _apiInvoke(action, params={}) {
                 }
             });
         } catch (e) {
-            window.yomichan_orphaned = true;
             reject(e);
+            yomichan.triggerOrphaned(e);
         }
     });
 }

ext/mixed/js/core.js

@@ -244,6 +244,14 @@ const yomichan = (() => {
             chrome.runtime.onMessage.addListener(this._onMessage.bind(this));
         }
 
+        // Public
+
+        triggerOrphaned(error) {
+            this.trigger('orphaned', {error});
+        }
+
+        // Private
+
         _onMessage({action, params}, sender, callback) {
             const handler = this._messageHandlers.get(action);
             if (typeof handler !== 'function') { return false; }