Method mosh

tiling.js:532–540

(windows, height, y0)

        let needRelayout = false;

        function mosh(windows, height, y0) {
            let targetHeights = fitProportionally(
                windows.map(mw => mw.get_frame_rect().height),
                height
            );
            let [, relayout, y] = space.layoutColumnSimple(windows, x, y0, targetWidth, targetHeights, time);
            needRelayout = needRelayout || relayout;
            return y;
        }

        const k = column.indexOf(grabWindow);
        if (k < 0) {