website

src/Surface.zig

@@ -1519,7 +1519,11 @@ fn mouseShiftCapture(self: *const Surface, lock: bool) bool {
 
     // If thet terminal explicitly requests it then we always allow it
     // since we processed never/always at this point.
-    if (self.io.terminal.flags.mouse_shift_capture) return true;
+    switch (self.io.terminal.flags.mouse_shift_capture) {
+        .false => return false,
+        .true => return true,
+        .null => {},
+    }
 
     // Otherwise, go with the user's preference
     return switch (self.config.mouse_shift_capture) {

src/terminal/Terminal.zig

@@ -106,7 +106,7 @@ flags: packed struct {
     /// Set via the XTSHIFTESCAPE sequence. If true (XTSHIFTESCAPE = 1)
     /// then we want to capture the shift key for the mouse protocol
     /// if the configuration allows it.
-    mouse_shift_capture: bool = false,
+    mouse_shift_capture: enum { null, false, true } = .null,
 } = .{},
 
 /// The event types that can be reported for mouse-related activities.

src/termio/Exec.zig

@@ -1522,7 +1522,7 @@ const StreamHandler = struct {
     }
 
     pub fn setMouseShiftCapture(self: *StreamHandler, v: bool) !void {
-        self.terminal.flags.mouse_shift_capture = v;
+        self.terminal.flags.mouse_shift_capture = if (v) .true else .false;
     }
 
     pub fn setAttribute(self: *StreamHandler, attr: terminal.Attribute) !void {