context menus, document refactoring, fixes

src/manager.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <vector>
+
+#include "document.h"
+#include "imgui.h"
+
+using namespace anm2ed::document;
+
+namespace anm2ed::manager
+{
+  class Manager
+  {
+  public:
+    std::vector<Document> documents{};
+    int selected{};
+    int pendingSelected{};
+
+    anm2::Layer editLayer{};
+    imgui::PopupHelper layerPropertiesPopup{imgui::PopupHelper("Layer Properties", imgui::POPUP_SMALL, true)};
+
+    anm2::Null editNull{};
+    imgui::PopupHelper nullPropertiesPopup{imgui::PopupHelper("Null Properties", imgui::POPUP_SMALL, true)};
+
+    Document* get(int = -1);
+    void open(const std::string&, bool = false);
+    void new_(const std::string&);
+    void save(int, const std::string& = {});
+    void save(const std::string& = {});
+    void close(int);
+    void layer_properties_open(int = -1);
+    void layer_properties_trigger();
+    void layer_properties_end();
+    void layer_properties_close();
+    void null_properties_open(int = -1);
+    void null_properties_trigger();
+    void null_properties_end();
+    void null_properties_close();
+  };
+}