From 7e8be3f2804b8dfca1ede2a4e463f8a0b2b352d5 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Mon, 3 Jul 2023 16:06:59 -0700
Subject: [PATCH] Retry to open the clipboard in case another application has
 it open

This fixes 'testautomation --filter clipboard_testClipboardTextFunctions' on Windows

(cherry picked from commit c24496727cdd40d5c0ffdf7b6a61085ec3a2766d)
---
 src/video/windows/SDL_windowsclipboard.c | 36 +++++++++++++++---------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/src/video/windows/SDL_windowsclipboard.c b/src/video/windows/SDL_windowsclipboard.c
index bd43fc574..892af0d98 100644
--- a/src/video/windows/SDL_windowsclipboard.c
+++ b/src/video/windows/SDL_windowsclipboard.c
@@ -102,23 +102,31 @@ int WIN_SetClipboardText(_THIS, const char *text)
 
 char *WIN_GetClipboardText(_THIS)
 {
-    char *text;
+    char *text = NULL;
 
-    text = NULL;
-    if (IsClipboardFormatAvailable(TEXT_FORMAT) &&
-        OpenClipboard(GetWindowHandle(_this))) {
-        HANDLE hMem;
-        LPTSTR tstr;
+    if (IsClipboardFormatAvailable(TEXT_FORMAT)) {
+        /* Retry to open the clipboard in case another application has it open */
+        const int MAX_ATTEMPTS = 3;
+        int attempt;
 
-        hMem = GetClipboardData(TEXT_FORMAT);
-        if (hMem) {
-            tstr = (LPTSTR)GlobalLock(hMem);
-            text = WIN_StringToUTF8(tstr);
-            GlobalUnlock(hMem);
-        } else {
-            WIN_SetError("Couldn't get clipboard data");
+        for (attempt = 0; attempt < MAX_ATTEMPTS; ++attempt) {
+            if (OpenClipboard(GetWindowHandle(_this))) {
+                HANDLE hMem;
+                LPTSTR tstr;
+
+                hMem = GetClipboardData(TEXT_FORMAT);
+                if (hMem) {
+                    tstr = (LPTSTR)GlobalLock(hMem);
+                    text = WIN_StringToUTF8(tstr);
+                    GlobalUnlock(hMem);
+                } else {
+                    WIN_SetError("Couldn't get clipboard data");
+                }
+                CloseClipboard();
+                break;
+            }
+            SDL_Delay(10);
         }
-        CloseClipboard();
     }
     if (text == NULL) {
         text = SDL_strdup("");