A mouse event carries Shift and Alt as well as Ctrl, from SDL and from the tty's input; a program's wheel report carries them as xterm counts them, and Shift keeps the wheel pardes's own scroll

The reports are ghostty's encoder now (shift+4, meta+8, ctrl+16), with the
mode and format ghostty tracks. The detached wire carries the two new
bits: version 9. The test shell's ESC]777;mouse takes an optional fifth
field of modifiers.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 8 insertions, 2 deletions

diff --git a/src/detached/wire.zig b/src/detached/wire.zig
index 051e9317..9a1ab608 100644
--- a/src/detached/wire.zig
+++ b/src/detached/wire.zig
@@ -12,7 +12,7 @@ const ShaderAnimation = pardes.config.Runtime.ShaderAnimation;
 /// to be refused, which is what this number is for.
 /// 8: one layer type: a tag band carries all its rows (not a layer per
 /// line), and a frame carries the core's placed regions after its layers.
-pub const version: u16 = 8;
+pub const version: u16 = 9;
 
 /// The Chrome palette is carried field by field as its declaration lists
 /// them, so any change to it changes the wire: bump `version`, then this.
@@ -1052,6 +1052,8 @@ pub fn encodeClient(out: []u8, msg: ClientMsg) Error![]const u8 {
                 try w.putU16(m.col);
                 try w.putU16(m.row);
                 try w.putBool(m.ctrl);
+                try w.putBool(m.shift);
+                try w.putBool(m.alt);
                 try putBodyHit(&w, m.body_hit);
                 try putTagHit(&w, m.tag_hit);
             },
@@ -1115,6 +1117,8 @@ pub fn decodeClient(tag: u8, payload: []const u8) Error!ClientMsg {
             .col = try r.getU16(),
             .row = try r.getU16(),
             .ctrl = try r.getBool(),
+            .shift = try r.getBool(),
+            .alt = try r.getBool(),
             .body_hit = try getBodyHit(&r),
             .tag_hit = try getTagHit(&r),
         } } },
@@ -1357,13 +1361,15 @@ test "detached wire: every Event variant round-trips" {
         // the only place a value can be mistranslated and still decode.
         for (std.enums.values(pardes.Mouse.Button)) |button| {
             for (std.enums.values(pardes.Mouse.Kind)) |kind| {
-                const m: pardes.Mouse = .{ .button = button, .kind = kind, .col = 4200, .row = 7, .ctrl = true };
+                const m: pardes.Mouse = .{ .button = button, .kind = kind, .col = 4200, .row = 7, .ctrl = true, .shift = true, .alt = true };
                 const got = (try roundClient(&buf, .{ .event = .{ .mouse = m } })).event.mouse;
                 try testing.expectEqual(m.button, got.button);
                 try testing.expectEqual(m.kind, got.kind);
                 try testing.expectEqual(m.col, got.col);
                 try testing.expectEqual(m.row, got.row);
                 try testing.expectEqual(m.ctrl, got.ctrl);
+                try testing.expectEqual(m.shift, got.shift);
+                try testing.expectEqual(m.alt, got.alt);
             }
         }
     }