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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIConsoleListener;
+interface nsIConsoleMessage;
+
+[scriptable, builtinclass, uuid(0eb81d20-c37e-42d4-82a8-ca9ae96bdf52)]
+interface nsIConsoleService : nsISupports
+{
+ void logMessage(in nsIConsoleMessage message);
+
+ // This helper function executes `function` and redirects any exception
+ // that may be thrown while running it to the DevTools Console currently
+ // debugging `targetGlobal`.
+ //
+ // This helps flag the nsIScriptError with a particular innerWindowID
+ // which is especially useful for WebExtension content scripts
+ // where script are running in a Sandbox whose prototype is the content window.
+ // We expect content script exception to be flaged with the content window
+ // innerWindowID in order to appear in the tab's DevTools.
+ [implicit_jscontext]
+ jsval callFunctionAndLogException(in jsval targetGlobal, in jsval function);
+
+ // This is a variant of LogMessage which allows the caller to determine
+ // if the message should be output to an OS-specific log. This is used on
+ // B2G to control whether the message is logged to the android log or not.
+ cenum OutputMode : 8 {
+ SuppressLog = 0,
+ OutputToLog
+ };
+ void logMessageWithMode(in nsIConsoleMessage message,
+ in nsIConsoleService_OutputMode mode);
+
+ /**
+ * Convenience method for logging simple messages.
+ */
+ void logStringMessage(in wstring message);
+
+ /**
+ * Get an array of all the messages logged so far.
+ */
+ Array<nsIConsoleMessage> getMessageArray();
+
+ /**
+ * To guard against stack overflows from listeners that could log
+ * messages (it's easy to do this inadvertently from listeners
+ * implemented in JavaScript), we don't call any listeners when
+ * another error is already being logged.
+ */
+ void registerListener(in nsIConsoleListener listener);
+
+ /**
+ * Each registered listener should also be unregistered.
+ */
+ void unregisterListener(in nsIConsoleListener listener);
+
+ /**
+ * Clear the message buffer (e.g. for privacy reasons).
+ */
+ void reset();
+
+ /**
+ * Clear the message buffer for a given window.
+ */
+ void resetWindow(in uint64_t windowInnerId);
+};
+
+
+%{ C++
+#define NS_CONSOLESERVICE_CID \
+{ 0x7e3ff85c, 0x1dd2, 0x11b2, { 0x8d, 0x4b, 0xeb, 0x45, 0x2c, 0xb0, 0xff, 0x40 }}
+
+#define NS_CONSOLESERVICE_CONTRACTID "@mozilla.org/consoleservice;1"
+%}