terminal-window: don't paint the CSD shadow margins when transparentHEADmaster

With a transparent profile background the toplevel becomes app-paintable and
terminal_window_draw() fills the whole window. GTK reserves margins on such a
toplevel for the client-side window shadow and the titlebar, so the fill paints
those margins too: the shadow disappears and the margins show up as a band of
the terminal background around the window (it was the theme background before,
which read as a second, lighter window).

Fill only the content rectangle (the child allocation) and leave the margins to
the shadow, exactly as the non-paintable path does. The opaque path is
unchanged.

The band only appears when the toplevel really has CSD margins - measured on a
Wayland session as toplevel 708x523 with child 656x434+26+60 - which is why it
is not visible everywhere.

0 files changed, 0 insertions, 0 deletions