save cairomakie svg around axis

cairomakie_svg_around_axis.jl

using CairoMakie
using GLMakie
GLMakie.activate!()

f = Figure()
for i in 1:3, j in 1:3
    Axis(f[i, j], title = "$i $j")
end
display(f)

function outer_bbox(ax; padding)
    sbb = ax.layoutobservables.suggestedbbox[]
    prot = ax.layoutobservables.protrusions[]
    o = sbb.origin .- (prot.left, prot.bottom) .- padding
    w = sbb.widths .+ (prot.left + prot.right, prot.bottom + prot.top) .+ 2 * padding
    Rect2f(o, w)
end

function save_cropped_svg(file, scene, bbox)
    sw, sh = scene.viewport[].widths
    ox, oy = bbox.origin
    w, h = bbox.widths
    svg = mktempdir() do dir
        save(joinpath(dir, "output.svg"), scene; backend = CairoMakie)
        read(joinpath(dir, "output.svg"), String)
    end
    svg = replace(
        svg,
        r"viewBox=\".*?\"" => "viewBox=\"$ox $(sh - oy - h) $w $h\"",
        r"width=\".*?\"" => "width=\"$w\"",
        r"height=\".*?\"" => "height=\"$h\"",
        count = 3,
    )
    open(file, "w") do io
        write(io, svg)
    end
    return
end

ax = current_axis()

save_cropped_svg("test.svg", ax.blockscene, outer_bbox(ax; padding = 10))