feat: Implement Myers' diffing algorithm (#1508)

plugins/diffing/include/content/views/view_diff.hpp

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <hex.hpp>
+
+#include <hex/ui/view.hpp>
+#include <hex/api/task_manager.hpp>
+
+#include <array>
+#include <vector>
+
+#include "ui/hex_editor.hpp"
+
+namespace hex::plugin::diffing {
+
+    class ViewDiff : public View::Window {
+    public:
+        ViewDiff();
+        ~ViewDiff() override;
+
+        void drawContent() override;
+        ImGuiWindowFlags getWindowFlags() const override { return ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse; }
+
+    public:
+        struct Column {
+            ui::HexEditor hexEditor;
+            ContentRegistry::Diffing::DiffTree diffTree;
+
+            int provider = -1;
+            i32 scrollLock = 0;
+        };
+
+    private:
+        std::function<std::optional<color_t>(u64, const u8*, size_t)> createCompareFunction(size_t otherIndex) const;
+        void analyze(prv::Provider *providerA, prv::Provider *providerB);
+
+    private:
+        std::array<Column, 2> m_columns;
+
+        TaskHolder m_diffTask;
+        std::atomic<bool> m_analyzed = false;
+        ContentRegistry::Diffing::Algorithm *m_algorithm = nullptr;
+    };
+
+}