Add support to extract viewer preference

fpdfsdk/include/fpdfview.h

Index: fpdfsdk/include/fpdfview.h
diff --git a/fpdfsdk/include/fpdfview.h b/fpdfsdk/include/fpdfview.h
index a563762613aad02d340f3cbdfed8323c711b2374..0b0e8ed2ff5d7c5c8f8836f27dd804842dd49585 100644
--- a/fpdfsdk/include/fpdfview.h
+++ b/fpdfsdk/include/fpdfview.h
@@ -34,6 +34,7 @@ typedef void*	FPDF_BOOKMARK;
 typedef void*	FPDF_DEST;
 typedef void*	FPDF_ACTION;
 typedef void*	FPDF_LINK;
+typedef void*   FPDF_PAGERANGE;
 
 // Basic data types
 typedef int				FPDF_BOOL;
@@ -561,6 +562,33 @@ DLLEXPORT void STDCALL FPDFBitmap_Destroy(FPDF_BITMAP bitmap);
 //
 DLLEXPORT FPDF_BOOL STDCALL FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document);
 
+// Function: FPDF_VIEWERREF_GetNumCopies
+//			Returns the number of copies to be printed.
+// Parameters:
+//			document	-	Handle to the loaded document.
+// Return value:
+//			The number of copies to be printed.

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

please replace tabs with spaces

[Nikhil, 2014/06/26 10:21:38]

It looks like all files here use tabs. Can we use clang-format here?

On 2014/06/25 18:02:24, Vitaly Buka wrote:

+//
+DLLEXPORT int STDCALL FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document);
+
+// Function: FPDF_VIEWERREF_GetPrintPageRange
+//			Page numbers to initialize print dialog box when file is printed.
+// Parameters:
+//			document	-	Handle to the loaded document.
+// Return value:
+//			The print page range to be used for printing.

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

ditto

+//
+DLLEXPORT FPDF_PAGERANGE STDCALL FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document);
+
+// Function: FPDF_VIEWERREF_GetDuplex
+//			Returns the paper handling option to be used when printing from print dialog.
+// Parameters:
+//			document	-	Handle to the loaded document.
+// Return value:
+//			The paper handling option to be used when printing.
+//

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

ditto

+DLLEXPORT int STDCALL FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document);

[Vitaly Buka (NO REVIEWS), 2014/06/25 18:02:24]

Please return enum here

[Nikhil, 2014/06/26 10:21:38]

With current implementation, enum DuplexType isn't exposed here. So I added
define for FPDF_DUPLEXTYPE similar to FPDF_BOOL. Please let me know if you think
this should be changed somehow.

[Vitaly Buka (NO REVIEWS), 2014/06/26 20:03:37]

I'd prefer to move enum to some accessible location.

Any opinion from Foxit team?

On 2014/06/26 10:21:38, Nikhil wrote:

[Bo Xu, 2014/06/29 20:58:16]

I agree. Move enum to fpdfsdk part will be more clear.

On 2014/06/26 20:03:37, Vitaly Buka wrote:

[Nikhil, 2014/07/07 08:54:18]

Done.

+
 // Function: FPDF_GetNamedDestByName
 //			get a special dest handle by the index.
 // Parameters: