Mouse tracking [wip]

Works with TERM=linux, does not work with TERM=xterm-256color.
Will need to update libtsm to handle mouse events as there is an escape
sequence to turn tracking on/off.
Probably something similar to tsm_vte_handle_keyboard().

addons/godot_xterm/native/src/pipe.cpp

@@ -63,9 +63,10 @@ void Pipe::close() {
   uv_run(uv_default_loop(), UV_RUN_NOWAIT);
 }
 
-godot_error Pipe::write(String p_data) {
+godot_error Pipe::write(PoolByteArray p_data) {
-  char *s = p_data.alloc_c_string();
+  ULONG len = p_data.size();
-  ULONG len = strlen(s);
+  char *s = (char *)malloc(len);
+  memcpy(s, p_data.read().ptr(), len);
 
   uv_buf_t bufs[1];
   bufs[0].base = s;
@@ -113,7 +114,7 @@ void _read_cb(uv_stream_t *handle, ssize_t nread, const uv_buf_t *buf) {
   pipe->emit_signal("data_received", data);
 }
 
-void _write_cb(uv_write_t *req, int status) {}
+void _write_cb(uv_write_t *req, int status) { std::free(req->data); }
 
 void _alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
   buf->base = (char *)malloc(suggested_size);

addons/godot_xterm/native/src/pipe.h

@@ -26,7 +26,7 @@ public:
   void close();
   int get_status();
 
-  godot_error write(String p_data);
+  godot_error write(PoolByteArray p_data);
 
   void pause();
   void resume();

addons/godot_xterm/nodes/pty/pty.gd

@@ -174,7 +174,9 @@ func write(data) -> void:
 	_write(data)
 
 
-func _write(data: String) -> void:
+func _write(data) -> void:
+	assert(data is PoolByteArray or data is String)
+	data = data if data is PoolByteArray else data.to_utf8()
 	if _pipe:
 		_pipe.write(data)
 

addons/godot_xterm/nodes/terminal/terminal.gd

@@ -29,8 +29,12 @@ export (UpdateMode) var update_mode = UpdateMode.AUTO setget set_update_mode
 var cols = 2
 var rows = 2
 
+# Mouse
+
 # If true, text in the terminal will be copied to the clipboard when selected.
 export (bool) var copy_on_selection
+# If true mouse events will be emitted by the signal when clicking on the Terminal.
+export (bool) var mouse_tracking := true
 
 # Bell
 # If muted, the "bell" signal will not be emitted when the bell "\u0007" character
@@ -160,10 +164,34 @@ func _refresh():
 
 
 func _gui_input(event):
-	_native_terminal._gui_input(event)
+	#_native_terminal._gui_input(event)
 
 	if event is InputEventKey:
-		_native_terminal.sb_reset()  # Return to bottom of scrollback buffer if we scrolled up.
+		pass
+		_native_terminal._gui_input(event)
+		#_native_terminal.sb_reset()  # Return to bottom of scrollback buffer if we scrolled up.
+
+	# Mouse tracking.
+	# Reference: https://www.xfree86.org/current/ctlseqs.html#Mouse%20Tracking
+	if mouse_tracking:
+		if event is InputEventMouseButton:
+			var b: int
+			if event.pressed:
+				if event.button_index == BUTTON_LEFT:
+					b = 0
+				if event.button_index == BUTTON_RIGHT:
+					b = 1
+				if event.button_index == BUTTON_MIDDLE:
+					b = 2
+			else:
+				b = 3
+
+			# Xterm coords start at 1,1 for the top/leftmost cell.
+			var position: Vector2 = _mouse_to_cell(get_local_mouse_position()) + Vector2.ONE
+			var e = "\u001b[M".to_ascii()
+			print(_native_terminal.cell_size)
+			e = PoolByteArray([0x1b, 0x5b, 0x4d, b + 32, position.x + 32, position.y + 32])
+			emit_signal("data_sent", e)
 
 	_handle_mouse_wheel(event)
 	_handle_selection(event)