Add PDF writer.

src/publishing/pdf/PdfObject.cpp

@@ -0,0 +1,58 @@
+#include "PdfObject.h"
+
+#include "PdfDictionary.h"
+#include "PdfXRefTable.h"
+
+std::string PdfObject::ToString(PdfXRefTable* xRefTable)
+{
+    UpdateDictionary();
+
+    auto content = GetStringPrefix();
+    content += mDictionary.ToString();
+    content += GetStringSuffix();
+
+    xRefTable->AddRecord(content.size(), mGenerationNumber, mIsFree);
+    return content;
+}
+
+void PdfObject::UpdateDictionary()
+{
+
+}
+
+std::string PdfObject::GetStringSuffix() const
+{
+    return "endobj\n\n";
+}
+
+unsigned PdfObject::IndexObjects(unsigned count)
+{
+    const auto newCount = count + 1;
+    mObjectNumber = newCount;
+    return newCount;
+}
+
+void PdfObject::SetObjectNumber(unsigned num)
+{
+    mObjectNumber = num;
+}
+
+void PdfObject::SetGenerationNumber(unsigned num)
+{
+    mGenerationNumber = num;
+}
+
+std::string PdfObject::GetStringPrefix() const
+{
+    return std::to_string(mObjectNumber) + " " + std::to_string(mGenerationNumber) + " obj\n";
+}
+
+std::string PdfObject::GetRefString() const
+{
+    return std::to_string(mObjectNumber) + " " + std::to_string(mGenerationNumber) + " R";
+}
+
+bool PdfObject::IsFree() const
+{
+    return mIsFree;
+}