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Implement left-side primary

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This adds a new config `primary_side` that can be either `left` or `right`
and determines whether the primary stack is on the left or the right
side of the screen.
This commit is contained in:
Ben Buhse 2026-02-25 15:16:48 -06:00
commit 164ae9a7ab
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GPG key ID: 7916ACFCD38FD0B4
5 changed files with 42 additions and 18 deletions
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19
src/Output.zig
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@ -639,8 +639,9 @@ pub fn render(output: *Output) void {
}
/// Calculate primary/stack layout positions for all windows.
/// - Single window: maximized
/// - Multiple windows: stack (45% left, vertically tiled), primary (55% right)
/// - Single window: window is told it's maximized and takes up usable_width * single_window_ratio width
/// - Multiple windows: two stacks, primary and secondary. By default, the stack is on the right and takes
/// up 55% of the output width, but this can be configured. Each tagmask has its own primary ratio and count.
fn calculateLayout(output: *Output) void {
// Shouldn't be called if height/width are not positive
assert(output.geometry.width > 0 and output.geometry.height > 0);
@ -711,6 +712,12 @@ fn calculateLayout(output: *Output) void {
else
0;
// Determine the stack x coordinates based on whether primary is set to the left or right
const primary_x, const stack_x = switch (output.context.config.primary_side) {
.right => .{ output_x + @as(i32, stack_width), output_x },
.left => .{ output_x, output_x + @as(i32, primary_width) },
};
// Iterate through the active windows and apply positions
var i: u31 = 0;
while (active_list.popFirst()) |node| : (i += 1) {
@ -718,9 +725,9 @@ fn calculateLayout(output: *Output) void {
window.pending_manage.maximized = false;
if (i < primary_count) {
// Primary window(s) - right side
// Primary window(s)
window.pending_render.position = .{
.x = output_x + @as(i32, stack_width),
.x = primary_x,
.y = output_y + @as(i32, i) * @as(i32, primary_height),
};
const pending_width = primary_width;
@ -734,10 +741,10 @@ fn calculateLayout(output: *Output) void {
.height = pending_height,
};
} else {
// Stack window(s) - left side
// Stack window(s)
const stack_index = i - primary_count;
window.pending_render.position = .{
.x = output_x,
.x = stack_x,
.y = output_y + @as(i32, stack_index) * @as(i32, stack_height),
};
const pending_width = stack_width;