Improve command input and adding resize handling.

include/internal/io/io.h

@@ -5,12 +5,18 @@
 
 namespace bed::internal::io {
 struct KeyEvent {
+  enum struct ReadResult {
+    SUCCESS,
+    EOF_,
+    RESIZE
+  };
   enum struct KeyType {
     NONE,
     CHAR,
     SPECIAL,
     MOUSE,
-    PASTE
+    PASTE,
+    RESIZE
   };
   enum struct SpecialKey {
     UP,
@@ -58,6 +64,7 @@ struct IO {
   void move_cursor(uint16_t row, uint16_t col);
 
   std::pair<std::string, bool> get_command(BEd &);
+  std::pair<std::string, bool> get_text(BEd &);
 
   KeyEvent read_key();
 
@@ -65,15 +72,17 @@ private:
   static termios orig_termios;
   static bool cleaned;
   static void cleanup();
+  static volatile std::atomic_bool resized;
+  static void handle_sigwinch(int);
 
   std::deque<char> input_queue;
 
-  bool get_next_byte(char &out);
+  KeyEvent::ReadResult get_next_byte(char &out);
   void enqueue_bytes(const std::string &bytes);
   static int utf8_seq_len(uint8_t byte);
 
-  std::string read_next_unit();
-  bool read_bracketed_paste(std::string &out);
+  KeyEvent::ReadResult read_next_unit(std::string &out);
+  KeyEvent::ReadResult read_bracketed_paste(std::string &out);
 
   KeyEvent parse_mouse(const std::string &buf);
   KeyEvent parse_escape(const std::string &buf);