layout: rethonk layouts from the ground up (#12890)

Rewrites layouts to be much smaller, and deal with much less annoying
BS. Improves the overall architecture, unifies handling of pseudotiling,
and various other improvements.

1 files changed, 75 insertions, 0 deletions

diff --git a/src/layout/algorithm/tiled/master/MasterAlgorithm.hpp b/src/layout/algorithm/tiled/master/MasterAlgorithm.hpp
new file mode 100644
index 00000000..4524587f
--- /dev/null
+++ b/src/layout/algorithm/tiled/master/MasterAlgorithm.hpp
@@ -0,0 +1,75 @@
+#include "../../TiledAlgorithm.hpp"
+
+#include <hyprutils/string/VarList2.hpp>
+
+namespace Layout {
+    class CAlgorithm;
+}
+
+namespace Layout::Tiled {
+    struct SMasterNodeData;
+
+    //orientation determines which side of the screen the master area resides
+    enum eOrientation : uint8_t {
+        ORIENTATION_LEFT = 0,
+        ORIENTATION_TOP,
+        ORIENTATION_RIGHT,
+        ORIENTATION_BOTTOM,
+        ORIENTATION_CENTER
+    };
+
+    struct SMasterWorkspaceData {
+        WORKSPACEID  workspaceID = WORKSPACE_INVALID;
+        eOrientation orientation = ORIENTATION_LEFT;
+        // Previously focused non-master window when `focusmaster previous` command was issued
+        WP<ITarget> focusMasterPrev;
+
+        //
+        bool operator==(const SMasterWorkspaceData& rhs) const {
+            return workspaceID == rhs.workspaceID;
+        }
+    };
+
+    class CMasterAlgorithm : public ITiledAlgorithm {
+      public:
+        CMasterAlgorithm()          = default;
+        virtual ~CMasterAlgorithm() = default;
+
+        virtual void                             newTarget(SP<ITarget> target);
+        virtual void                             movedTarget(SP<ITarget> target, std::optional<Vector2D> focalPoint = std::nullopt);
+        virtual void                             removeTarget(SP<ITarget> target);
+
+        virtual void                             resizeTarget(const Vector2D& Δ, SP<ITarget> target, eRectCorner corner = CORNER_NONE);
+        virtual void                             recalculate();
+
+        virtual SP<ITarget>                      getNextCandidate(SP<ITarget> old);
+
+        virtual std::expected<void, std::string> layoutMsg(const std::string_view& sv);
+        virtual std::optional<Vector2D>          predictSizeForNewTarget();
+
+        virtual void                             swapTargets(SP<ITarget> a, SP<ITarget> b);
+        virtual void                             moveTargetInDirection(SP<ITarget> t, Math::eDirection dir, bool silent);
+
+      private:
+        std::vector<SP<SMasterNodeData>> m_masterNodesData;
+        SMasterWorkspaceData             m_workspaceData;
+
+        void                             addTarget(SP<ITarget> target, bool firstMap);
+
+        bool                             m_forceWarps = false;
+
+        void                             buildOrientationCycleVectorFromVars(std::vector<eOrientation>& cycle, Hyprutils::String::CVarList2* vars);
+        void                             buildOrientationCycleVectorFromEOperation(std::vector<eOrientation>& cycle);
+        void                             runOrientationCycle(Hyprutils::String::CVarList2* vars, int next);
+        eOrientation                     getDynamicOrientation();
+        int                              getNodesNo();
+        SP<SMasterNodeData>              getNodeFromWindow(PHLWINDOW);
+        SP<SMasterNodeData>              getNodeFromTarget(SP<ITarget>);
+        SP<SMasterNodeData>              getMasterNode();
+        SP<SMasterNodeData>              getClosestNode(const Vector2D&);
+        void                             calculateWorkspace();
+        SP<ITarget>                      getNextTarget(SP<ITarget>, bool, bool);
+        int                              getMastersNo();
+        bool                             isWindowTiled(PHLWINDOW);
+    };
+};
\ No newline at end of file