Improve highlighting structure

- switched to a sparse delta based map
- true lazy-loading to avoid any unneccessary allocations
- fixed windows management api

include/syntax/parser.h

@@ -3,24 +3,22 @@
 
 #include "ruby/decl.h"
 #include "syntax/decl.h"
-#include "syntax/line_tree.h"
+#include "syntax/line_map.h"
 
 struct Parser {
   struct Editor *editor = nullptr;
   std::string lang;
-  std::shared_ptr<void> (*parse_func)(std::vector<Token> *tokens,
-                                      std::shared_ptr<void> in_state,
-                                      const char *text, uint32_t len,
-                                      uint32_t line_num);
-  bool (*state_match_func)(std::shared_ptr<void> state_1,
-                           std::shared_ptr<void> state_2);
+  std::unique_ptr<StateBase> (*parse_func)(std::vector<Token> *tokens,
+                                           StateBase *in_state,
+                                           const char *text, uint32_t len,
+                                           uint32_t line_num);
+  bool (*state_match_func)(StateBase *state_1, StateBase *state_2);
   mrb_value parser_block = mrb_nil_value();
   mrb_value match_block = mrb_nil_value();
   bool is_custom{false};
   std::atomic<uint32_t> scroll_max{0};
   std::atomic<bool> scroll_dirty{false};
-  LineTree line_tree;
-  UniqueQueue<uint32_t> dirty_lines;
+  LineMap line_map = LineMap();
 
   Parser(Editor *editor, std::string n_lang, uint32_t n_scroll_max);
   void edit(uint32_t start_line, uint32_t removed_rows, uint32_t inserted_rows);