log history memory usage add fix virtual dtor for Action subclasses to be deleted from memory

engine/action.cpp

@@ -1,4 +1,5 @@
 #include "pch.h"
+#include "log.h"
 #include "action.h"
 
 ActionManager ActionManager::I;

engine/action.h

@@ -5,6 +5,8 @@ class Action
 public:
     virtual void run() = 0;
     virtual void undo() = 0;
+    virtual size_t memory() = 0;
+    virtual ~Action(){};
 };
 
 class ActionManager
@@ -12,13 +14,22 @@ class ActionManager
 public:
     static ActionManager I;
     std::stack<std::unique_ptr<Action>> m_actions;
+    size_t m_memory = 0;
     static void add(Action* action)
     {
         I.m_actions.emplace(action);
+        I.m_memory += action->memory();
+        LOG("History: %.2f KB", I.m_memory / 1024.f);
     }
     static void undo()
     {
         I.m_actions.top()->undo();
+        I.m_memory -= I.m_actions.top()->memory();
         I.m_actions.pop();
+        LOG("History: %.2f KB", I.m_memory / 1024.f);
+    }
+    static bool empty()
+    {
+        return I.m_actions.empty();
     }
 };

engine/app.cpp

@@ -623,7 +623,8 @@ void App::initLayout()
         if (auto* button = layout[main_id]->find<NodeButton>("btn-undo"))
         {
             button->on_click = [this,button](Node*) {
-                ActionManager::undo();
+                if (!ActionManager::empty())
+                    ActionManager::undo();
             };
         }
         if (auto* button = layout[main_id]->find<NodeButton>("btn-clear"))

engine/canvas.h

@@ -157,6 +157,21 @@ public:
             m_canvas->m_layers[m_layer_idx].m_rtt[i].unbindTexture();
         }
     }
+    virtual size_t memory() override
+    {
+        size_t mem = 0;
+        for (int i = 0; i < 6; i++)
+        {
+            glm::vec2 sz = m_box[i].zw() - m_box[i].xy();
+            mem += sz.x * sz.y * 4 + sizeof(*this);
+        }
+        return mem;
+    }
+    virtual ~ActionStroke()
+    {
+        
+        LOG("ActionStroke destroyed: free %zu bytes", memory());
+    }
 };
 
 NS_END

engine/canvas_modes.cpp

@@ -353,6 +353,7 @@ void CanvasModeFill::on_MouseEvent(MouseEvent* me, glm::vec2& loc)
     case kEventType::MouseCancel:
         m_dragging = false;
         node->mouse_release();
+        m_points.clear();
         break;
     default:
         break;