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Add PendingState to Seat

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Ben Buhse 2026-01-25 12:10:00 -06:00
commit bfa41f36b0
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3 changed files with 83 additions and 20 deletions
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49
src/Seat.zig
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@ -10,8 +10,23 @@ seat_v1: *river.SeatV1,
focused: ?*Window,
/// Used to manage updates to various aspect of Seat's state
/// Gets reset at the end of every Seat.manage() call.
pending_state: PendingState = .{},
link: wl.list.Link,
/// Used to manage updates to various aspect of Seat's state
pub const PendingState = struct {
pending_focus: ?PendingFocus = null,
should_warp_pointer: bool = false,
pub const PendingFocus = union(enum) {
window: *Window,
clear_focus,
};
};
pub fn init(seat: *Seat, context: *Context, river_seat_v1: *river.SeatV1) void {
seat.* = .{
.context = context,
@ -36,12 +51,12 @@ fn seatListener(river_seat_v1: *river.SeatV1, event: river.SeatV1.Event, seat: *
.pointer_enter => |ev| {
const window_v1 = ev.window orelse return;
const window: *Window = @ptrCast(@alignCast(window_v1.getUserData()));
seat.focused = window;
seat.pending_state.pending_focus = .{ .window = window };
},
.window_interaction => |ev| {
const window_v1 = ev.window orelse return;
const window: *Window = @ptrCast(@alignCast(window_v1.getUserData()));
seat.focused = window;
seat.pending_state.pending_focus = .{ .window = window };
},
else => |ev| {
log.debug("unhandled event: {s}", .{@tagName(ev)});
@ -50,8 +65,34 @@ fn seatListener(river_seat_v1: *river.SeatV1, event: river.SeatV1.Event, seat: *
}
pub fn manage(seat: *Seat) void {
if (seat.focused) |window| {
seat.seat_v1.focusWindow(window.window_v1);
defer seat.pending_state = .{};
log.debug("Managing Seat, pending state={any}", .{seat.pending_state});
if (seat.pending_state.pending_focus) |pending_focus| {
switch (pending_focus) {
.window => |window| {
seat.focused = window;
seat.seat_v1.focusWindow(window.window_v1);
},
.clear_focus => {
seat.focused = null;
seat.seat_v1.clearFocus();
},
}
}
if (seat.pending_state.should_warp_pointer) blk: {
const window = seat.focused orelse {
log.err("Trying to warp pointer without focused window.", .{});
break :blk;
};
// TODO - CONFIG: Allow disabling this behaviour
// Warp pointer to center of newly-focused windows
const pointer_x: i32 = @divTrunc(window.x + window.width, 2);
const pointer_y: i32 = @divTrunc(window.y + window.height, 2);
seat.seat_v1.pointerWarp(pointer_x, pointer_y);
log.debug("warped pointer to {}, {}", .{ pointer_x, pointer_y });
}
}