3 files changed, 223 insertions, 0 deletions
diff --git a/xpcom/rust/xpcom/src/interfaces/idl.rs b/xpcom/rust/xpcom/src/interfaces/idl.rs
new file mode 100644
index 0000000000..c8d62ce716
--- /dev/null
+++ b/xpcom/rust/xpcom/src/interfaces/idl.rs
@@ -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/. */
+
+#![allow(bad_style)]
+
+use crate::interfaces::*;
+use crate::*;
+
+// NOTE: This file contains a series of `include!()` invocations, defining all
+// idl interfaces directly within this module.
+include!(mozbuild::objdir_path!("dist/xpcrs/rt/all.rs"));
diff --git a/xpcom/rust/xpcom/src/interfaces/mod.rs b/xpcom/rust/xpcom/src/interfaces/mod.rs
new file mode 100644
index 0000000000..5b9de5cef5
--- /dev/null
+++ b/xpcom/rust/xpcom/src/interfaces/mod.rs
@@ -0,0 +1,31 @@
+/* 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/. */
+
+//! This module contains the xpcom interfaces exposed to rust code.
+//!
+//! The items in this module come in a few flavours:
+//!
+//! 1. `nsI*`: These are the types for XPCOM interfaces. They should always be
+//!    passed behind a reference, pointer, or `RefPtr`. They may be coerced to
+//!    their base interfaces using the `coerce` method.
+//!
+//! 2. `nsI*Coerce`: These traits provide the implementation mechanics for the
+//!    `coerce` method, and can usually be ignored. *These traits are hidden in
+//!    rustdoc*
+//!
+//! 3. `nsI*VTable`: These structs are the vtable definitions for each type.
+//!    They contain the base interface's vtable, followed by pointers for each
+//!    of the vtable's methods. If direct access is needed, a `*const nsI*` can
+//!    be safely transmuted to a `*const nsI*VTable`. *These structs are hidden
+//!    in rustdoc*
+//!
+//! 4. Typedefs used in idl file definitions.
+
+// Interfaces defined in .idl files
+mod idl;
+pub use self::idl::*;
+
+// Other interfaces which are needed to compile
+mod nonidl;
+pub use self::nonidl::*;
diff --git a/xpcom/rust/xpcom/src/interfaces/nonidl.rs b/xpcom/rust/xpcom/src/interfaces/nonidl.rs
new file mode 100644
index 0000000000..b9e3f1abe2
--- /dev/null
+++ b/xpcom/rust/xpcom/src/interfaces/nonidl.rs
@@ -0,0 +1,180 @@
+/* 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/. */
+
+//! This module contains definitions of interfaces which are used in idl files
+//! as forward declarations, but are not actually defined in an idl file.
+//!
+//! NOTE: The IIDs in these files must be kept in sync with the IDL definitions
+//! in the corresponding C++ files.
+
+use crate::nsID;
+
+// XXX: This macro should have an option for a custom base interface instead of
+// nsISupports, such that Document can have nsINode as a base, etc. For now,
+// query_interface should be sufficient.
+macro_rules! nonidl {
+    ($name:ident, $iid:expr) => {
+        /// This interface is referenced from idl files, but not defined in
+        /// them. It exports no methods to rust code.
+        #[repr(C)]
+        pub struct $name {
+            _vtable: *const $crate::interfaces::nsISupportsVTable,
+        }
+
+        unsafe impl $crate::XpCom for $name {
+            const IID: $crate::nsIID = $iid;
+        }
+
+        unsafe impl $crate::RefCounted for $name {
+            #[inline]
+            unsafe fn addref(&self) {
+                self.AddRef();
+            }
+            #[inline]
+            unsafe fn release(&self) {
+                self.Release();
+            }
+        }
+
+        impl ::std::ops::Deref for $name {
+            type Target = $crate::interfaces::nsISupports;
+            #[inline]
+            fn deref(&self) -> &$crate::interfaces::nsISupports {
+                unsafe { ::std::mem::transmute(self) }
+            }
+        }
+    };
+}
+
+// Must be kept in sync with Document.h
+nonidl!(
+    Document,
+    nsID(
+        0xce1f7627,
+        0x7109,
+        0x4977,
+        [0xba, 0x77, 0x49, 0x0f, 0xfd, 0xe0, 0x7a, 0xaa]
+    )
+);
+
+// Must be kept in sync with nsINode.h
+nonidl!(
+    nsINode,
+    nsID(
+        0x70ba4547,
+        0x7699,
+        0x44fc,
+        [0xb3, 0x20, 0x52, 0xdb, 0xe3, 0xd1, 0xf9, 0x0a]
+    )
+);
+
+// Must be kept in sync with nsIContent.h
+nonidl!(
+    nsIContent,
+    nsID(
+        0x8e1bab9d,
+        0x8815,
+        0x4d2c,
+        [0xa2, 0x4d, 0x7a, 0xba, 0x52, 0x39, 0xdc, 0x22]
+    )
+);
+
+// Must be kept in sync with nsIConsoleReportCollector.h
+nonidl!(
+    nsIConsoleReportCollector,
+    nsID(
+        0xdd98a481,
+        0xd2c4,
+        0x4203,
+        [0x8d, 0xfa, 0x85, 0xbf, 0xd7, 0xdc, 0xd7, 0x05]
+    )
+);
+
+// Must be kept in sync with nsIGlobalObject.h
+nonidl!(
+    nsIGlobalObject,
+    nsID(
+        0x11afa8be,
+        0xd997,
+        0x4e07,
+        [0xa6, 0xa3, 0x6f, 0x87, 0x2e, 0xc3, 0xee, 0x7f]
+    )
+);
+
+// Must be kept in sync with nsIScriptElement.h
+nonidl!(
+    nsIScriptElement,
+    nsID(
+        0xe60fca9b,
+        0x1b96,
+        0x4e4e,
+        [0xa9, 0xb4, 0xdc, 0x98, 0x4f, 0x88, 0x3f, 0x9c]
+    )
+);
+
+// Must be kept in sync with nsPIDOMWindow.h
+nonidl!(
+    nsPIDOMWindowOuter,
+    nsID(
+        0x769693d4,
+        0xb009,
+        0x4fe2,
+        [0xaf, 0x18, 0x7d, 0xc8, 0xdf, 0x74, 0x96, 0xdf]
+    )
+);
+
+// Must be kept in sync with nsPIDOMWindow.h
+nonidl!(
+    nsPIDOMWindowInner,
+    nsID(
+        0x775dabc9,
+        0x8f43,
+        0x4277,
+        [0x9a, 0xdb, 0xf1, 0x99, 0x0d, 0x77, 0xcf, 0xfb]
+    )
+);
+
+// Must be kept in sync with nsIScriptContext.h
+nonidl!(
+    nsIScriptContext,
+    nsID(
+        0x54cbe9cf,
+        0x7282,
+        0x421a,
+        [0x91, 0x6f, 0xd0, 0x70, 0x73, 0xde, 0xb8, 0xc0]
+    )
+);
+
+// Must be kept in sync with nsIScriptGlobalObject.h
+nonidl!(
+    nsIScriptGlobalObject,
+    nsID(
+        0x876f83bd,
+        0x6314,
+        0x460a,
+        [0xa0, 0x45, 0x1c, 0x8f, 0x46, 0x2f, 0xb8, 0xe1]
+    )
+);
+
+// Must be kept in sync with nsIScrollObserver.h
+nonidl!(
+    nsIScrollObserver,
+    nsID(
+        0xaa5026eb,
+        0x2f88,
+        0x4026,
+        [0xa4, 0x6b, 0xf4, 0x59, 0x6b, 0x4e, 0xdf, 0x00]
+    )
+);
+
+// Must be kept in sync with nsIWidget.h
+nonidl!(
+    nsIWidget,
+    nsID(
+        0x06396bf6,
+        0x2dd8,
+        0x45e5,
+        [0xac, 0x45, 0x75, 0x26, 0x53, 0xb1, 0xc9, 0x80]
+    )
+);