Query font size and DPI from terminal

tools/tui/loop/api.go

@@ -4,6 +4,7 @@ package loop
 
 import (
 	"encoding/base64"
+	"encoding/hex"
 	"fmt"
 	"os"
 	"runtime"
@@ -89,6 +90,9 @@ type Loop struct {
 	// Called when a response to an rc command is received
 	OnRCResponse func(data []byte) error
 
+	// Called when a response to a query command is received
+	OnQueryResponse func(key, val string, valid bool) error
+
 	// Called when any input from tty is received
 	OnReceivedData func(data []byte) error
 
@@ -481,6 +485,17 @@ func (self *Loop) CopyTextToClipboard(text string) {
 	self.copy_text_to(text, "c")
 }
 
+func (self *Loop) QueryTerminal(fields ...string) IdType {
+	if len(fields) == 0 {
+		return 0
+	}
+	q := make([]string, len(fields))
+	for i, x := range fields {
+		q[i] = hex.EncodeToString(utils.UnsafeStringToBytes("kitty-query-" + x))
+	}
+	return self.QueueWriteString(fmt.Sprintf("\x1bP+q%s\a", strings.Join(q, ";")))
+}
+
 func (self *Loop) PushPointerShape(s PointerShape) {
 	self.pointer_shapes = append(self.pointer_shapes, s)
 	self.QueueWriteString("\x1b]22;" + s.String() + "\x1b\\")