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fix BadMatch error when embedding on some windows

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When embedded into another window, dmenu will fail with the BadMatch
error if that window have not the same colormap/depth/visual as the
root window.

That happens because dmenu inherits the colormap/depth/visual from
its parent, but draws on a pixmap created based on the root window
using a GC created for the root window (see drw.c).  A BadMatch will
occur when copying the content of the pixmap into dmenu's window.

A solution is to create dmenu's window inside root and then reparent
it if embeded.

See this mail[1] on ports@openbsd.org mailing list for context.

[1]: https://marc.info/?l=openbsd-ports&m=168072150814664&w=2
This commit is contained in:
Lucas de Sena 2023-04-05 17:11:49 -03:00 committed by Hiltjo Posthuma
parent dfbbf7f6e1
commit 0fe460dbd4
1 changed files with 2 additions and 1 deletions
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3
dmenu.c
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@ -685,7 +685,7 @@ setup(void)
swa.override_redirect = True; swa.override_redirect = True;
swa.background_pixel = scheme[SchemeNorm][ColBg].pixel; swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask; swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0, win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
CopyFromParent, CopyFromParent, CopyFromParent, CopyFromParent, CopyFromParent, CopyFromParent,
CWOverrideRedirect | CWBackPixel | CWEventMask, &swa); CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
XSetClassHint(dpy, win, &ch); XSetClassHint(dpy, win, &ch);
@ -700,6 +700,7 @@ setup(void)
XMapRaised(dpy, win); XMapRaised(dpy, win);
if (embed) { if (embed) {
XReparentWindow(dpy, win, parentwin, x, y);
XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask); XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) { if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
for (i = 0; i < du && dws[i] != win; ++i) for (i = 0; i < du && dws[i] != win; ++i)