config/lua: add simple layout API (#14258)

Adds a simple layout lua api

1 files changed, 59 insertions, 0 deletions

diff --git a/src/config/lua/layout/LuaLayoutProvider.hpp b/src/config/lua/layout/LuaLayoutProvider.hpp
new file mode 100644
index 00000000..4e223670
--- /dev/null
+++ b/src/config/lua/layout/LuaLayoutProvider.hpp
@@ -0,0 +1,59 @@
+#pragma once
+
+#include "../../../helpers/memory/Memory.hpp"
+#include "../../../helpers/math/Math.hpp"
+#include "../../../layout/algorithm/TiledAlgorithm.hpp"
+
+#include <optional>
+#include <string>
+#include <string_view>
+#include <vector>
+
+extern "C" {
+#include <lua.h>
+#include <lauxlib.h>
+}
+
+namespace Config::Lua {
+    class CConfigManager;
+}
+
+namespace Config::Lua::Layouts {
+
+    struct SLuaLayoutProvider {
+        CConfigManager* manager = nullptr;
+        lua_State*      state   = nullptr;
+        std::string     name;
+        int             tableRef = LUA_NOREF;
+        bool            active   = true;
+        bool            didError = false;
+    };
+
+    class CLuaTiledAlgorithm : public Layout::ITiledAlgorithm {
+      public:
+        explicit CLuaTiledAlgorithm(SP<SLuaLayoutProvider> provider);
+        virtual ~CLuaTiledAlgorithm() = default;
+
+        virtual void                       newTarget(SP<Layout::ITarget> target);
+        virtual void                       movedTarget(SP<Layout::ITarget> target, std::optional<Vector2D> focalPoint = std::nullopt);
+        virtual void                       removeTarget(SP<Layout::ITarget> target);
+        virtual void                       resizeTarget(const Vector2D& Δ, SP<Layout::ITarget> target, Layout::eRectCorner corner = Layout::CORNER_NONE);
+        virtual void                       recalculate();
+        virtual void                       swapTargets(SP<Layout::ITarget> a, SP<Layout::ITarget> b);
+        virtual void                       moveTargetInDirection(SP<Layout::ITarget> t, Math::eDirection dir, bool silent);
+        virtual Config::ErrorResult        layoutMsg(const std::string_view& sv);
+        virtual std::optional<Vector2D>    predictSizeForNewTarget();
+        virtual SP<Layout::ITarget>        getNextCandidate(SP<Layout::ITarget> old);
+        virtual std::optional<std::string> layoutName() const;
+
+      private:
+        SP<SLuaLayoutProvider>           m_provider;
+        std::vector<WP<Layout::ITarget>> m_targets;
+
+        std::vector<SP<Layout::ITarget>> liveTargets();
+        bool                             callRecalculate(const std::vector<SP<Layout::ITarget>>& targets);
+        void                             applyDefaultGrid(const std::vector<SP<Layout::ITarget>>& targets);
+        void                             reportError(const std::string& message);
+    };
+
+}