1 files changed, 80 insertions, 0 deletions
diff --git a/comm/mail/components/devtools/devtools-loader.jsm b/comm/mail/components/devtools/devtools-loader.jsm
new file mode 100644
index 0000000000..a951bb2b94
--- /dev/null
+++ b/comm/mail/components/devtools/devtools-loader.jsm
@@ -0,0 +1,80 @@
+/* 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";
+
+function DevToolsStartup() {}
+
+DevToolsStartup.prototype = {
+  QueryInterface: ChromeUtils.generateQI(["nsICommandLineHandler"]),
+
+  helpInfo: "",
+  handle(cmdLine) {
+    this.initialize();
+
+    // We want to overwrite the -devtools flag and open the toolbox instead
+    let devtoolsFlag = cmdLine.handleFlag("devtools", false);
+    if (devtoolsFlag) {
+      this.handleDevToolsFlag(cmdLine);
+    }
+  },
+
+  handleDevToolsFlag(cmdLine) {
+    const { BrowserToolboxLauncher } = ChromeUtils.importESModule(
+      "resource://devtools/client/framework/browser-toolbox/Launcher.sys.mjs"
+    );
+    BrowserToolboxLauncher.init();
+
+    if (cmdLine.state == Ci.nsICommandLine.STATE_REMOTE_AUTO) {
+      cmdLine.preventDefault = true;
+    }
+  },
+
+  initialize() {
+    let { loader, require, DevToolsLoader } = ChromeUtils.importESModule(
+      "resource://devtools/shared/loader/Loader.sys.mjs"
+    );
+    let { DevToolsServer } = require("devtools/server/devtools-server");
+    let { gDevTools } = require("devtools/client/framework/devtools");
+
+    // Set up the client and server chrome window type, make sure it can't be set
+    Object.defineProperty(DevToolsServer, "chromeWindowType", {
+      get: () => "mail:3pane",
+      set: () => {},
+      configurable: true,
+    });
+    Object.defineProperty(gDevTools, "chromeWindowType", {
+      get: () => "mail:3pane",
+      set: () => {},
+      configurable: true,
+    });
+
+    // Make sure our root actor is always registered, no matter how devtools are called.
+    let devtoolsRegisterActors =
+      DevToolsServer.registerActors.bind(DevToolsServer);
+    DevToolsServer.registerActors = function (options) {
+      devtoolsRegisterActors(options);
+      if (options.root) {
+        const {
+          createRootActor,
+        } = require("resource:///modules/tb-root-actor.js");
+        DevToolsServer.setRootActor(createRootActor);
+      }
+    };
+
+    // Make the loader visible to the debugger by default and for the already
+    // loaded instance. Thunderbird now also provides the Browser Toolbox for
+    // chrome debugging, which uses its own separate loader instance.
+    DevToolsLoader.prototype.invisibleToDebugger = false;
+    loader.invisibleToDebugger = false;
+    DevToolsServer.allowChromeProcess = true;
+
+    // Initialize and load the toolkit/browser actors. This will also call above function to set the
+    // Thunderbird root actor
+    DevToolsServer.init();
+    DevToolsServer.registerAllActors();
+  },
+};
+
+var EXPORTED_SYMBOLS = ["DevToolsStartup"];