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Minimal support for _NET_WM_WINDOW_OPACITY

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While we don't provide compositing ourselves, add-on compositors such as
xcompmgr need us to copy the _NET_WM_WINDOW_OPACITY property from the
client window to the frame window.

We can do this easily enough.
This commit is contained in:
Brad Jorsch
2014-02-11 17:23:54 -05:00
committed by Carlos R. Mafra
parent 3b97d33d0a
commit 2e0d2f3df9
3 changed files with 45 additions and 0 deletions
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42
src/wmspec.c
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@@ -115,6 +115,7 @@ static Atom net_wm_icon_geometry; /* FIXME: should work together with net_wm_han
static Atom net_wm_icon;
static Atom net_wm_pid; /* TODO */
static Atom net_wm_handled_icons; /* FIXME: see net_wm_icon_geometry */
static Atom net_wm_window_opacity;
static Atom net_frame_extents;
@@ -190,6 +191,7 @@ static atomitem_t atomNames[] = {
{"_NET_WM_ICON", &net_wm_icon},
{"_NET_WM_PID", &net_wm_pid},
{"_NET_WM_HANDLED_ICONS", &net_wm_handled_icons},
{"_NET_WM_WINDOW_OPACITY", &net_wm_window_opacity},
{"_NET_FRAME_EXTENTS", &net_frame_extents},
@@ -292,6 +294,7 @@ static void setSupportedHints(WScreen *scr)
atom[i++] = net_wm_icon_geometry;
atom[i++] = net_wm_icon;
atom[i++] = net_wm_handled_icons;
atom[i++] = net_wm_window_opacity;
atom[i++] = net_frame_extents;
@@ -472,6 +475,34 @@ static void updateIconImage(WWindow *wwin)
}
}
static void updateWindowOpacity(WWindow *wwin)
{
Atom type;
int format;
unsigned long items, rest;
unsigned long *property;
if (!wwin->frame)
return;
/* We don't care about this ourselves, but other programs need us to copy
* this to the frame window. */
if (XGetWindowProperty(dpy, wwin->client_win, net_wm_window_opacity, 0L, 1L,
False, XA_CARDINAL, &type, &format, &items, &rest,
(unsigned char **)&property) != Success)
return;
if (type == None) {
XDeleteProperty(dpy, wwin->frame->core->window, net_wm_window_opacity);
} else if (type == XA_CARDINAL && format == 32 && items == 1 && property) {
XChangeProperty(dpy, wwin->frame->core->window, net_wm_window_opacity,
XA_CARDINAL, 32, PropModeReplace, (unsigned char *)property, 1L);
}
if (property)
XFree(property);
}
static void updateShowDesktop(WScreen *scr, Bool show)
{
long foo;
@@ -1300,6 +1331,15 @@ void wNETWMCheckInitialClientState(WWindow *wwin)
updateIconImage(wwin);
}
void wNETWMCheckInitialFrameState(WWindow *wwin)
{
#ifdef DEBUG_WMSPEC
wmessage("wNETWMCheckInitialFrameState");
#endif
updateWindowOpacity(wwin);
}
static void handleDesktopNames(WScreen *scr)
{
unsigned long nitems_ret, bytes_after_ret;
@@ -1470,6 +1510,8 @@ void wNETWMCheckClientHintChange(WWindow *wwin, XPropertyEvent *event)
}
} else if (event->atom == net_wm_icon) {
updateIconImage(wwin);
} else if (event->atom == net_wm_window_opacity) {
updateWindowOpacity(wwin);
}
}