1 files changed, 81 insertions, 0 deletions
diff --git a/mobile/android/modules/geckoview/GeckoViewChildModule.sys.mjs b/mobile/android/modules/geckoview/GeckoViewChildModule.sys.mjs
new file mode 100644
index 0000000000..68cff76ba7
--- /dev/null
+++ b/mobile/android/modules/geckoview/GeckoViewChildModule.sys.mjs
@@ -0,0 +1,81 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+
+const { debug, warn } = GeckoViewUtils.initLogging("Module[C]");
+
+export class GeckoViewChildModule {
+  static initLogging(aModuleName) {
+    this._moduleName = aModuleName;
+    const tag = aModuleName.replace("GeckoView", "") + "[C]";
+    return GeckoViewUtils.initLogging(tag);
+  }
+
+  static create(aGlobal, aModuleName) {
+    return new this(aModuleName || this._moduleName, aGlobal);
+  }
+
+  constructor(aModuleName, aGlobal) {
+    this.moduleName = aModuleName;
+    this.messageManager = aGlobal;
+    this.enabled = false;
+
+    if (!aGlobal._gvEventDispatcher) {
+      aGlobal._gvEventDispatcher = GeckoViewUtils.getDispatcherForWindow(
+        aGlobal.content
+      );
+      aGlobal.addEventListener(
+        "unload",
+        event => {
+          if (event.target === this.messageManager) {
+            aGlobal._gvEventDispatcher.finalize();
+          }
+        },
+        {
+          mozSystemGroup: true,
+        }
+      );
+    }
+    this.eventDispatcher = aGlobal._gvEventDispatcher;
+
+    this.messageManager.addMessageListener(
+      "GeckoView:UpdateModuleState",
+      aMsg => {
+        if (aMsg.data.module !== this.moduleName) {
+          return;
+        }
+
+        const { enabled } = aMsg.data;
+
+        if (enabled !== this.enabled) {
+          if (!enabled) {
+            this.onDisable();
+          }
+
+          this.enabled = enabled;
+
+          if (enabled) {
+            this.onEnable();
+          }
+        }
+      }
+    );
+
+    this.onInit();
+
+    this.messageManager.sendAsyncMessage("GeckoView:ContentModuleLoaded", {
+      module: this.moduleName,
+    });
+  }
+
+  // Override to initialize module.
+  onInit() {}
+
+  // Override to enable module after setting a Java delegate.
+  onEnable() {}
+
+  // Override to disable module after clearing the Java delegate.
+  onDisable() {}
+}