diff -r 000000000000 -r 6474c204b198 widget/nsIDeviceContextSpec.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/nsIDeviceContextSpec.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 nsIDeviceContextSpec_h___
+#define nsIDeviceContextSpec_h___
+
+#include "nsISupports.h"
+
+class nsIWidget;
+class nsIPrintSettings;
+class gfxASurface;
+
+#define NS_IDEVICE_CONTEXT_SPEC_IID   \
+{ 0xb5548fb1, 0xf43e, 0x4921, \
+  { 0x82, 0x19, 0xc3, 0x82, 0x06, 0xee, 0x74, 0x5c } }
+
+class nsIDeviceContextSpec : public nsISupports
+{
+public:
+   NS_DECLARE_STATIC_IID_ACCESSOR(NS_IDEVICE_CONTEXT_SPEC_IID)
+
+   /**
+    * Initialize the device context spec.
+    * @param aWidget         A widget a dialog can be hosted in
+    * @param aPrintSettings  Print settings for the print operation
+    * @param aIsPrintPreview True if creating Spec for PrintPreview
+    * @return NS_OK or a suitable error code.
+    */
+   NS_IMETHOD Init(nsIWidget *aWidget,
+                   nsIPrintSettings* aPrintSettings,
+                   bool aIsPrintPreview) = 0;
+
+   NS_IMETHOD GetSurfaceForPrinter(gfxASurface **nativeSurface) = 0;
+
+   NS_IMETHOD BeginDocument(const nsAString& aTitle,
+                            char16_t*       aPrintToFileName,
+                            int32_t          aStartPage,
+                            int32_t          aEndPage) = 0;
+
+   NS_IMETHOD EndDocument() = 0;
+   NS_IMETHOD BeginPage() = 0;
+   NS_IMETHOD EndPage() = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIDeviceContextSpec,
+                              NS_IDEVICE_CONTEXT_SPEC_IID)
+#endif