DocDiff application: detect moved pages

Pdf4QtLib/sources/pdfdocumenttextflow.h

@@ -71,6 +71,9 @@ public:
 
     }
 
+    /// Add text item
+    void addItem(Item item) { m_items.emplace_back(std::move(item)); }
+
     const Items& getItems() const { return m_items; }
 
     /// Returns item at a given index
@@ -83,6 +86,11 @@ public:
     /// Returns true, if text flow is empty
     bool isEmpty() const { return m_items.empty(); }
 
+    /// Split text flow to pages using given mask. Items, which
+    /// are masked out, are not added.
+    /// \param mask Mask
+    std::map<PDFInteger, PDFDocumentTextFlow> split(Flags mask) const;
+
 private:
     Items m_items;
 };