1 files changed, 84 insertions, 0 deletions
diff --git a/dom/base/nsIScriptGlobalObject.h b/dom/base/nsIScriptGlobalObject.h
new file mode 100644
index 0000000000..51c122f8ad
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+++ b/dom/base/nsIScriptGlobalObject.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=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/. */
+
+#ifndef nsIScriptGlobalObject_h__
+#define nsIScriptGlobalObject_h__
+
+#include "nsISupports.h"
+#include "nsIGlobalObject.h"
+#include "js/TypeDecls.h"
+#include "mozilla/EventForwards.h"
+
+class nsIScriptContext;
+class nsIScriptGlobalObject;
+
+namespace mozilla::dom {
+struct ErrorEventInit;
+}  // namespace mozilla::dom
+
+// A helper function for nsIScriptGlobalObject implementations to use
+// when handling a script error.  Generally called by the global when a context
+// notifies it of an error via nsIScriptGlobalObject::HandleScriptError.
+// Returns true if HandleDOMEvent was actually called, in which case
+// aStatus will be filled in with the status.
+// TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+MOZ_CAN_RUN_SCRIPT_BOUNDARY bool NS_HandleScriptError(
+    nsIScriptGlobalObject* aScriptGlobal,
+    const mozilla::dom::ErrorEventInit& aErrorEvent, nsEventStatus* aStatus);
+
+// Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs
+#define NS_ISCRIPTGLOBALOBJECT_IID                   \
+  {                                                  \
+    0x876f83bd, 0x6314, 0x460a, {                    \
+      0xa0, 0x45, 0x1c, 0x8f, 0x46, 0x2f, 0xb8, 0xe1 \
+    }                                                \
+  }
+
+/**
+ * The global object which keeps a script context for each supported script
+ * language. This often used to store per-window global state.
+ * This is a heavyweight interface implemented only by DOM globals, and
+ * it might go away some time in the future.
+ */
+
+class nsIScriptGlobalObject : public nsIGlobalObject {
+ public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCRIPTGLOBALOBJECT_IID)
+
+  /**
+   * Ensure that the script global object is initialized for working with the
+   * specified script language ID.  This will set up the nsIScriptContext
+   * and 'script global' for that language, allowing these to be fetched
+   * and manipulated.
+   * @return NS_OK if successful; error conditions include that the language
+   * has not been registered, as well as 'normal' errors, such as
+   * out-of-memory
+   */
+  virtual nsresult EnsureScriptEnvironment() = 0;
+  /**
+   * Get a script context (WITHOUT added reference) for the specified language.
+   */
+  virtual nsIScriptContext* GetScriptContext() = 0;
+
+  nsIScriptContext* GetContext() { return GetScriptContext(); }
+
+  /**
+   * Handle a script error.  Generally called by a script context.
+   */
+  bool HandleScriptError(const mozilla::dom::ErrorEventInit& aErrorEventInit,
+                         nsEventStatus* aEventStatus) {
+    return NS_HandleScriptError(this, aErrorEventInit, aEventStatus);
+  }
+
+  virtual bool IsBlackForCC(bool aTracingNeeded = true) { return false; }
+
+ protected:
+  virtual ~nsIScriptGlobalObject() = default;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptGlobalObject, NS_ISCRIPTGLOBALOBJECT_IID)
+
+#endif