3 files changed, 105 insertions, 0 deletions
diff --git a/devtools/client/application/src/modules/application-services.js b/devtools/client/application/src/modules/application-services.js
new file mode 100644
index 0000000000..e51caa585b
--- /dev/null
+++ b/devtools/client/application/src/modules/application-services.js
@@ -0,0 +1,85 @@
+/* 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/. */
+
+"use strict";
+
+// keyword to use in telemetry, as `reason` parameter
+const REASON = "application";
+
+class ManifestDevToolsError extends Error {
+  constructor(...params) {
+    super(...params);
+
+    this.name = "ManifestDevToolsError";
+  }
+}
+
+class ApplicationServices {
+  init(toolbox) {
+    this._toolbox = toolbox;
+
+    this.features = {
+      doesDebuggerSupportWorkers: Services.prefs.getBoolPref(
+        "devtools.debugger.features.windowless-service-workers",
+        false
+      ),
+    };
+  }
+
+  selectTool(toolId) {
+    this._assertInit();
+    return this._toolbox.selectTool(toolId, REASON);
+  }
+
+  async openWorkerInDebugger(workerDescriptorFront) {
+    const debuggerPanel = await this.selectTool("jsdebugger");
+    debuggerPanel.selectWorker(workerDescriptorFront);
+  }
+
+  async viewWorkerSource(workerDescriptorFront) {
+    // NOTE: this falls back to view-source: if the source can't be inspected
+    //       within the debugger.
+    this._toolbox.viewSourceInDebugger(
+      workerDescriptorFront.url,
+      1,
+      1,
+      null,
+      REASON
+    );
+  }
+
+  async fetchManifest() {
+    let response;
+
+    try {
+      this._assertInit();
+      const manifestFront = await this._toolbox.target.getFront("manifest");
+      response = await manifestFront.fetchCanonicalManifest();
+    } catch (error) {
+      throw new ManifestDevToolsError(
+        error.message,
+        error.fileName,
+        error.lineNumber
+      );
+    }
+
+    if (response.errorMessage) {
+      throw new Error(response.errorMessage);
+    }
+
+    return response.manifest;
+  }
+
+  _assertInit() {
+    if (!this._toolbox) {
+      throw new Error("Services singleton has not been initialized");
+    }
+  }
+}
+
+module.exports = {
+  ManifestDevToolsError,
+  // exports a singleton, which will be used across all application panel modules
+  services: new ApplicationServices(),
+};
diff --git a/devtools/client/application/src/modules/l10n.js b/devtools/client/application/src/modules/l10n.js
new file mode 100644
index 0000000000..21e300cb38
--- /dev/null
+++ b/devtools/client/application/src/modules/l10n.js
@@ -0,0 +1,12 @@
+/* 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/. */
+
+"use strict";
+
+const {
+  FluentL10n,
+} = require("resource://devtools/client/shared/fluent-l10n/fluent-l10n.js");
+
+// exports a singleton, which will be used across all application panel modules
+exports.l10n = new FluentL10n();
diff --git a/devtools/client/application/src/modules/moz.build b/devtools/client/application/src/modules/moz.build
new file mode 100644
index 0000000000..778345fb1f
--- /dev/null
+++ b/devtools/client/application/src/modules/moz.build
@@ -0,0 +1,8 @@
+# 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/.
+
+DevToolsModules(
+    "application-services.js",
+    "l10n.js",
+)