From 499f019deaf6e7b7e7bb6bbb43b93a7296d9b4fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Mon, 9 Jun 2025 09:12:08 +0200
Subject: [PATCH] osc: 52: clear selection if the payload is the empty string

---
 CHANGELOG.md |  1 +
 osc.c        | 13 ++++++++-----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82b4238b..329a7650 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -114,6 +114,7 @@
   only ([#1846][1846]).
 * Drop required version of libxkbcommon from 1.8.0 back to 1.0.0
   ([#2103][2103]).
+* OSC-52: an empty payload now clears the clipboard.
 
 [1846]: https://codeberg.org/dnkl/foot/issues/1846
 [2103]: https://codeberg.org/dnkl/foot/issues/2103
diff --git a/osc.c b/osc.c
index d59adc5a..834029c1 100644
--- a/osc.c
+++ b/osc.c
@@ -73,16 +73,19 @@ osc_to_clipboard(struct terminal *term, const char *target,
     }
 
     char *decoded = base64_decode(base64_data, NULL);
-    if (decoded == NULL) {
-        if (errno == EINVAL)
-            LOG_WARN("OSC: invalid clipboard data: %s", base64_data);
-        else
-            LOG_ERRNO("base64_decode() failed");
+    if (decoded == NULL || decoded[0] == '\0') {
+        if (decoded == NULL) {
+            if (errno == EINVAL)
+                LOG_WARN("OSC: invalid clipboard data: %s", base64_data);
+            else
+                LOG_ERRNO("base64_decode() failed");
+        }
 
         if (to_clipboard)
             selection_clipboard_unset(seat);
         if (to_primary)
             selection_primary_unset(seat);
+        free(decoded);
         return;
     }