Add a --clear-all flag to icat to clear images from scrollback as well

kittens/icat/main.go

@@ -4,6 +4,7 @@ package icat
 
 import (
 	"fmt"
+	"math"
 	"os"
 	"runtime"
 	"strconv"
@@ -229,6 +230,20 @@ func main(cmd *cli.Command, o *Options, args []string) (rc int, err error) {
 			return 1, err
 		}
 	}
+	switch {
+	case opts.ClearAll:
+		cc := &graphics.GraphicsCommand{}
+		cc.SetAction(graphics.GRT_action_delete).SetDelete(graphics.GRT_free_by_range).SetLeftEdge(0).SetTopEdge(math.MaxUint32)
+		if err = cc.WriteWithPayloadTo(os.Stdout, nil); err != nil {
+			return 1, err
+		}
+	case opts.Clear:
+		cc := &graphics.GraphicsCommand{}
+		cc.SetAction(graphics.GRT_action_delete).SetDelete(graphics.GRT_free_visible)
+		if err = cc.WriteWithPayloadTo(os.Stdout, nil); err != nil {
+			return 1, err
+		}
+	}
 	if screen_size.Xpixel == 0 || screen_size.Ypixel == 0 {
 		return 1, fmt.Errorf("Terminal does not support reporting screen sizes in pixels, use a terminal such as kitty, WezTerm, Konsole, etc. that does.")
 	}

kittens/icat/main.py

@@ -54,6 +54,12 @@ this cannot work with terminal multiplexers such as tmux since
 only the multiplexer can know the position of the screen.
 
 
+--clear-all
+type=bool-set
+Remove all images from screen and scrollback. Note that with terminal
+multiplexers like tmux, this will move images from all panes.
+
+
 --transfer-mode
 type=choices
 choices=detect,file,stream,memory