From f57809c87658ab56630db0923daeb5af48415a11 Mon Sep 17 00:00:00 2001
From: Eugenio Parodi <ceccopierangiolieugenio@googlemail.com>
Date: Tue, 1 Aug 2023 11:41:13 +0100
Subject: [PATCH] FIX: #153 Non blocking SIGWINCH

---
 TermTk/TTkCore/TTkTerm/term_unix.py | 16 +++++++++++++---
 tools/check.import.sh               |  1 +
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/TermTk/TTkCore/TTkTerm/term_unix.py b/TermTk/TTkCore/TTkTerm/term_unix.py
index 56bbefa7..274f24ea 100644
--- a/TermTk/TTkCore/TTkTerm/term_unix.py
+++ b/TermTk/TTkCore/TTkTerm/term_unix.py
@@ -23,6 +23,7 @@
 # SOFTWARE.
 
 import sys, os, signal
+from threading import Thread, Lock
 
 try: import termios
 except Exception as e:
@@ -118,11 +119,20 @@ def _getTerminalSize():
            print(f'ERROR: {e}')
     TTkTermBase.getTerminalSize = _getTerminalSize
 
+    _sigWinChMutex = Lock()
+
+    @staticmethod
+    def _sigWinChThreaded():
+        if not TTkTerm._sigWinChMutex.acquire(blocking=False): return
+        while (TTkTerm.width, TTkTerm.height) != (wh:=TTkTerm.getTerminalSize()):
+            TTkTerm.width, TTkTerm.height = wh
+            if TTkTerm._sigWinChCb is not None:
+                TTkTerm._sigWinChCb(TTkTerm.width, TTkTerm.height)
+        TTkTerm._sigWinChMutex.release()
+
     @staticmethod
     def _sigWinCh(signum, frame):
-        TTkTerm.width, TTkTerm.height = TTkTerm.getTerminalSize()
-        if TTkTerm._sigWinChCb is not None:
-            TTkTerm._sigWinChCb(TTkTerm.width, TTkTerm.height)
+        Thread(target=TTkTerm._sigWinChThreaded).start()
 
     @staticmethod
     def _registerResizeCb(callback):
diff --git a/tools/check.import.sh b/tools/check.import.sh
index 61d994e4..3de1d394 100755
--- a/tools/check.import.sh
+++ b/tools/check.import.sh
@@ -24,6 +24,7 @@ __check(){
             -e "term.*.py:import sys, os, signal" \
             -e "term.*.py:from .term_base import TTkTermBase" \
             -e "term_pyodide.py:import pyodideProxy" \
+            -e "term_unix.py:from threading import Thread, Lock" \
             -e "timer.py:import importlib" \
             -e "timer_unix.py:import threading" \
             -e "timer_pyodide.py:import pyodideProxy" \