context menus, document refactoring, fixes

src/snapshots.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "anm2.h"
+
+namespace anm2ed::snapshots
+{
+  constexpr auto ACTION = "Action";
+  constexpr auto MAX = 100;
+
+  class Snapshot
+  {
+  public:
+    anm2::Anm2 anm2{};
+    anm2::Reference reference{};
+    std::string message = ACTION;
+  };
+
+  class SnapshotStack
+  {
+  public:
+    Snapshot snapshots[MAX];
+    int top{};
+
+    bool is_empty();
+    void push(Snapshot& snapshot);
+    Snapshot* pop();
+    void clear();
+  };
+
+  class Snapshots
+  {
+  public:
+    SnapshotStack undoStack{};
+    SnapshotStack redoStack{};
+
+    Snapshot* get();
+    void push(const anm2::Anm2&, anm2::Reference, const std::string&);
+    void undo(anm2::Anm2& anm2, anm2::Reference& reference, std::string&);
+    void redo(anm2::Anm2& anm2, anm2::Reference& reference, std::string&);
+    void reset();
+  };
+}