Initial Commit

src/UndoManager.cpp

@@ -0,0 +1,57 @@
+#include "UndoManager.hpp"
+#include <iostream>
+
+bool UndoManager::can_undo() {
+    return !undoQueue.empty();
+}
+
+bool UndoManager::can_redo() {
+    return !redoQueue.empty();
+}
+
+void UndoManager::push(const UndoRedoPair& undoRedoPair) {
+    push_undo(undoRedoPair);
+    redoQueue.clear();
+}
+
+void UndoManager::push_undo(const UndoRedoPair& undoRedoPair) {
+    if(undoQueue.size() == queueLimit)
+        undoQueue.pop_front();
+    undoQueue.emplace_back(undoRedoPair);
+}
+
+void UndoManager::push_redo(const UndoRedoPair& undoRedoPair) {
+    if(redoQueue.size() == queueLimit)
+        redoQueue.pop_front();
+    redoQueue.emplace_back(undoRedoPair);
+}
+
+void UndoManager::undo() {
+    if(undoQueue.empty())
+        return;
+    if(!undoQueue.back().undo()) {
+        clear();
+    }
+    else {
+        push_redo(undoQueue.back());
+        undoQueue.pop_back();
+    }
+}
+
+void UndoManager::redo() {
+    if(redoQueue.empty())
+        return;
+    if(!redoQueue.back().redo()) {
+        clear();
+    }
+    else {
+        push_undo(redoQueue.back());
+        redoQueue.pop_back();
+    }
+}
+
+void UndoManager::clear() {
+    std::cout << "[UndoManager::clear] Clearing undo queue" << std::endl;
+    redoQueue.clear();
+    undoQueue.clear();
+}