Add key mapping support

1 files changed, 52 insertions, 0 deletions

diff --git a/src/keymap_manager.hh b/src/keymap_manager.hh
new file mode 100644
index 00000000..c9887a6b
--- /dev/null
+++ b/src/keymap_manager.hh
@@ -0,0 +1,52 @@
+#ifndef keymap_manager_hh_INCLUDED
+#define keymap_manager_hh_INCLUDED
+
+#include "idvaluemap.hh"
+#include "keys.hh"
+#include "utils.hh"
+
+#include <unordered_map>
+
+namespace Kakoune
+{
+
+enum class KeymapMode : int
+{
+    None,
+    Normal,
+    Insert,
+    Prompt,
+    Menu
+};
+
+class KeymapManager
+{
+public:
+    KeymapManager(KeymapManager& parent) : m_parent(&parent) {}
+
+    void map_key(Key key, KeymapMode mode, std::vector<Key> mapping);
+    void unmap_key(Key key, KeymapMode mode);
+
+    bool is_mapped(Key key, KeymapMode mode) const;
+    memoryview<Key> get_mapping(Key key, KeymapMode mode) const;
+private:
+    KeymapManager()
+        : m_parent(nullptr) {}
+    // the only one allowed to construct a root map manager
+    friend class GlobalKeymaps;
+
+    KeymapManager* m_parent;
+
+    using Keymap = std::unordered_map<std::pair<Key, KeymapMode>, std::vector<Key>>;
+    Keymap m_mapping;
+};
+
+class GlobalKeymaps : public KeymapManager,
+                      public Singleton<GlobalKeymaps>
+{
+};
+
+}
+
+#endif // keymap_manager_hh_INCLUDED
+