clipboard kitten: Fix a bug causing kitten to hang in filter mode when input data size is not divisible by 3 and larger than 8KB

Fixes #8059

docs/changelog.rst

@@ -93,6 +93,8 @@ Detailed list of changes
 
 - Wayland GNOME: Workaround bug in mutter causing double tap on titlebar to not always work (:iss:`8054`)
 
+- clipboard kitten: Fix a bug causing kitten to hang in filter mode when input data size is not divisible by 3 and larger than 8KB (:iss:`8059`)
+
 0.37.0 [2024-10-30]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

kittens/clipboard/legacy.go

@@ -139,19 +139,24 @@ func run_plain_text_loop(opts *Options) (err error) {
 
 	buf := make([]byte, 8192)
 	write_one_chunk := func() error {
-		n, err := data_src.Read(buf[:cap(buf)])
-		if err != nil && !errors.Is(err, io.EOF) {
+		orig := enc_writer.last_written_id
+		for enc_writer.last_written_id == orig {
+			n, err := data_src.Read(buf[:cap(buf)])
+			if n > 0 {
+				enc.Write(buf[:n])
+			}
+			if err == nil {
+				continue
+			}
+			if errors.Is(err, io.EOF) {
+				enc.Close()
+				send_to_loop("\x1b\\")
+				after_read_from_stdin()
+				return nil
+			}
 			send_to_loop("\x1b\\")
 			return err
 		}
-		if n > 0 {
-			enc.Write(buf[:n])
-		}
-		if errors.Is(err, io.EOF) {
-			enc.Close()
-			send_to_loop("\x1b\\")
-			after_read_from_stdin()
-		}
 		return nil
 	}