Add APIs to work with a FPDF_PAGERANGE.

After getting a FPDF_PAGERANGE from FPDF_VIEWERREF_GetPrintPageRange(),
one can now use FPDF_VIEWERREF_GetPrintPageRangeCount() to get the
number of elements in the FPDF_PAGERANGE. One can then use
FPDF_VIEWERREF_GetPrintPageRangeElement() to read the elements.

Change-Id: I33eeff9026d01991ae1424e05b67f163245a35f9
Reviewed-on: https://pdfium-review.googlesource.com/32173
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/fpdfsdk/fpdf_view.cpp b/fpdfsdk/fpdf_view.cpp
index f5eea66125..22cb62ea6e 100644
--- a/fpdfsdk/fpdf_view.cpp
+++ b/fpdfsdk/fpdf_view.cpp
@@ -1003,6 +1003,21 @@ FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document) {
   return FPDFPageRangeFromCPDFArray(viewRef.PrintPageRange());
 }
 
+FPDF_EXPORT size_t FPDF_CALLCONV
+FPDF_VIEWERREF_GetPrintPageRangeCount(FPDF_PAGERANGE pagerange) {
+  const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange);
+  return pArray ? pArray->GetCount() : 0;
+}
+
+FPDF_EXPORT int FPDF_CALLCONV
+FPDF_VIEWERREF_GetPrintPageRangeElement(FPDF_PAGERANGE pagerange,
+                                        size_t index) {
+  const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange);
+  if (!pArray || index >= pArray->GetCount())
+    return -1;
+  return pArray->GetIntegerAt(index);
+}
+
 FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV
 FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) {
   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);