Create API for adding content marks and setting their params.chromium/3488

This CL creates the following new functions in the public API:
- FPDFPageObj_AddMark
- FPDFPageObjMark_SetIntParam
- FPDFPageObjMark_SetStringParam

Bug: pdfium:1037
Change-Id: Icabf3fdd8e8153b9156bab807a3708d38a9365d8
Reviewed-on: https://pdfium-review.googlesource.com/37330
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/core/fpdfapi/page/cpdf_contentmarkitem.cpp b/core/fpdfapi/page/cpdf_contentmarkitem.cpp
index 4f56eea919..dd9f7e884c 100644
--- a/core/fpdfapi/page/cpdf_contentmarkitem.cpp
+++ b/core/fpdfapi/page/cpdf_contentmarkitem.cpp
@@ -26,6 +26,18 @@ const CPDF_Dictionary* CPDF_ContentMarkItem::GetParam() const {
   }
 }
 
+CPDF_Dictionary* CPDF_ContentMarkItem::GetParam() {
+  switch (m_ParamType) {
+    case PropertiesDict:
+      return m_pPropertiesDict.Get();
+    case DirectDict:
+      return m_pDirectDict.get();
+    case None:
+    default:
+      return nullptr;
+  }
+}
+
 bool CPDF_ContentMarkItem::HasMCID() const {
   const CPDF_Dictionary* pDict = GetParam();
   return pDict && pDict->KeyExist("MCID");
@@ -37,7 +49,7 @@ void CPDF_ContentMarkItem::SetDirectDict(
   m_pDirectDict = std::move(pDict);
 }
 
-void CPDF_ContentMarkItem::SetPropertiesDict(const CPDF_Dictionary* pDict) {
+void CPDF_ContentMarkItem::SetPropertiesDict(CPDF_Dictionary* pDict) {
   m_ParamType = PropertiesDict;
   m_pPropertiesDict = pDict;
 }