Fix output glitch with inline driver

src/textual/drivers/linux_inline_driver.py

@@ -14,6 +14,8 @@
 import rich.repr
 
 from textual import events
+from textual._loop import loop_last
+from textual._parser import ParseError
 from textual._xterm_parser import XTermParser
 from textual.driver import Driver
 from textual.geometry import Size
@@ -132,23 +134,47 @@ def run_input_thread(self) -> None:
         decode = utf8_decoder
         read = os.read
 
+        def process_selector_events(
+            selector_events: list[tuple[selectors.SelectorKey, int]],
+            final: bool = False,
+        ) -> None:
+            """Process events from selector.
+
+            Args:
+                selector_events: List of selector events.
+                final: True if this is the last call.
+
+            """
+            for last, (_selector_key, mask) in loop_last(selector_events):
+                if mask & EVENT_READ:
+                    unicode_data = decode(read(fileno, 1024 * 4), final=final and last)
+                    if not unicode_data:
+                        # This can occur if the stdin is piped
+                        break
+                    for event in feed(unicode_data):
+                        if isinstance(event, events.CursorPosition):
+                            self.cursor_origin = (event.x, event.y)
+                        else:
+                            self.process_event(event)
+            for event in tick():
+                if isinstance(event, events.CursorPosition):
+                    self.cursor_origin = (event.x, event.y)
+                else:
+                    self.process_event(event)
+                self.process_event(event)
+
         try:
             while not self.exit_event.is_set():
-                selector_events = selector.select(0.1)
-                for event in tick():
-                    self.process_event(event)
-                for _selector_key, mask in selector_events:
-                    if mask & EVENT_READ:
-                        unicode_data = decode(
-                            read(fileno, 1024), final=self.exit_event.is_set()
-                        )
-                        for event in feed(unicode_data):
-                            if isinstance(event, events.CursorPosition):
-                                self.cursor_origin = (event.x, event.y)
-                            else:
-                                self.process_event(event)
+                process_selector_events(selector.select(0.1))
+            process_selector_events(selector.select(0.1), final=True)
+
         finally:
             selector.close()
+            try:
+                for event in feed(""):
+                    pass
+            except ParseError:
+                pass
 
     def start_application_mode(self) -> None:
         loop = asyncio.get_running_loop()