Add APIs for getting bookmarks and named destinations.

fpdfsdk/src/fpdfdoc.cpp

Index: fpdfsdk/src/fpdfdoc.cpp
diff --git a/fpdfsdk/src/fpdfdoc.cpp b/fpdfsdk/src/fpdfdoc.cpp
index ab2351f9d8102912ffce7709bcc7c97f7238ca2f..feb7cfbde592d4d399e9b34440cbbcba9651c165 100644
--- a/fpdfsdk/src/fpdfdoc.cpp
+++ b/fpdfsdk/src/fpdfdoc.cpp
@@ -27,6 +27,42 @@ static CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree, CPDF_Bookmark b
 	return CPDF_Bookmark();
 }
 
+DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict)
+{
+    if (!document || !pDict)
+        return NULL;
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+    CPDF_BookmarkTree tree(pDoc);
+    CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
+    return tree.GetFirstChild(bookmark).GetDict();
+}
+
+DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK pDict)
+{
+    if (!document || !pDict)
+        return NULL;
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+    CPDF_BookmarkTree tree(pDoc);
+    CPDF_Bookmark bookmark = CPDF_Bookmark((CPDF_Dictionary*)pDict);
+    return tree.GetNextSibling(bookmark).GetDict();
+}
+
+DLLEXPORT unsigned long STDCALL FPDFBookmark_GetTitle(FPDF_BOOKMARK pDict, void* buffer, unsigned long buflen)
+{
+    if (!pDict)
+        return 0;
+    CPDF_Bookmark bookmark((CPDF_Dictionary*)pDict);
+    CFX_WideString title = bookmark.GetTitle();
+    CFX_ByteString encodedTitle = title.UTF16LE_Encode(FALSE);
+    unsigned long len = encodedTitle.GetLength();
+    if (buffer && buflen >= len + 2) {
+        FXSYS_memcpy(buffer, encodedTitle.c_str(), len);
+        ((FX_BYTE*)buffer)[len] = 0;
+        ((FX_BYTE*)buffer)[len + 1] = 0;
+    }
+    return len + 2;
+}
+
 DLLEXPORT FPDF_BOOKMARK STDCALL FPDFBookmark_Find(FPDF_DOCUMENT document, FPDF_WIDESTRING title)
 {
 	if (!document)