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Add support for _NET_WM_FULLSCREEN_MONITORS

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This patch adds the _NET_WM_FULLSCREEN_MONITORS hint as defined in EWMH which is based on Xinerama.
It's allowing a window to be displayed fullscreen on multiple monitors.

Issue mentioned at https://github.com/window-maker/wmaker/issues/8
Specs at https://specifications.freedesktop.org/wm-spec/1.5/ar01s06.html#idm45763309187776
GTK test program used https://bugzilla.gnome.org/show_bug.cgi?id=414476
This commit is contained in:
David Maciejak
2023-02-18 14:53:14 +08:00
committed by Carlos R. Mafra
parent ac75047aef
commit 4d658341d2
7 changed files with 139 additions and 2 deletions
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54
src/wmspec.c
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@@ -77,6 +77,9 @@ static Atom net_wm_visible_name; /* TODO (unnecessary?) */
static Atom net_wm_icon_name;
static Atom net_wm_visible_icon_name; /* TODO (unnecessary?) */
static Atom net_wm_desktop;
#ifdef USE_XINERAMA
static Atom net_wm_fullscreen_monitors;
#endif
static Atom net_wm_window_type;
static Atom net_wm_window_type_desktop;
static Atom net_wm_window_type_dock;
@@ -161,6 +164,9 @@ static atomitem_t atomNames[] = {
{"_NET_WM_ICON_NAME", &net_wm_icon_name},
{"_NET_WM_VISIBLE_ICON_NAME", &net_wm_visible_icon_name},
{"_NET_WM_DESKTOP", &net_wm_desktop},
#ifdef USE_XINERAMA
{"_NET_WM_FULLSCREEN_MONITORS", &net_wm_fullscreen_monitors},
#endif
{"_NET_WM_WINDOW_TYPE", &net_wm_window_type},
{"_NET_WM_WINDOW_TYPE_DESKTOP", &net_wm_window_type_desktop},
{"_NET_WM_WINDOW_TYPE_DOCK", &net_wm_window_type_dock},
@@ -287,6 +293,9 @@ static void setSupportedHints(WScreen *scr)
atom[i++] = net_wm_moveresize;
#endif
atom[i++] = net_wm_desktop;
#ifdef USE_XINERAMA
atom[i++] = net_wm_fullscreen_monitors;
#endif
atom[i++] = net_wm_window_type;
atom[i++] = net_wm_window_type_desktop;
atom[i++] = net_wm_window_type_dock;
@@ -1027,6 +1036,9 @@ static void updateStateHint(WWindow *wwin, Bool changedWorkspace, Bool del)
{ /* changeable */
if (del) {
XDeleteProperty(dpy, wwin->client_win, net_wm_state);
#ifdef USE_XINERAMA
XDeleteProperty(dpy, wwin->client_win, net_wm_fullscreen_monitors);
#endif
} else {
Atom state[15]; /* nr of defined state atoms */
int i = 0;
@@ -1067,6 +1079,20 @@ static void updateStateHint(WWindow *wwin, Bool changedWorkspace, Bool del)
XChangeProperty(dpy, wwin->client_win, net_wm_state, XA_ATOM, 32,
PropModeReplace, (unsigned char *)state, i);
#ifdef USE_XINERAMA
if (wwin->flags.fullscreen && (wwin->flags.fullscreen_monitors[0] != -1)) {
unsigned long data[4];
data[0] = wwin->flags.fullscreen_monitors[0];
data[1] = wwin->flags.fullscreen_monitors[1];
data[2] = wwin->flags.fullscreen_monitors[2];
data[3] = wwin->flags.fullscreen_monitors[3];
XChangeProperty(dpy, wwin->client_win, net_wm_fullscreen_monitors, XA_CARDINAL, 32,
PropModeReplace, (unsigned char *)data, 4);
}
#endif
}
}
@@ -1260,8 +1286,10 @@ static void doStateAtom(WWindow *wwin, Atom state, int set, Bool init)
} else {
if (set)
wFullscreenWindow(wwin);
else
else {
wUnfullscreenWindow(wwin);
wwin->flags.fullscreen_monitors[0] = -1;
}
}
} else if (state == net_wm_state_above) {
if (set == _NET_WM_STATE_TOGGLE)
@@ -1759,8 +1787,30 @@ Bool wNETWMProcessClientMessage(XClientMessageEvent *event)
wWindowChangeWorkspace(wwin, desktop);
}
return True;
}
#ifdef USE_XINERAMA
} else if (event->message_type == net_wm_fullscreen_monitors) {
unsigned long top, bottom, left, right, src_indication;
top = event->data.l[0];
bottom = event->data.l[1];
left = event->data.l[2];
right = event->data.l[3];
src_indication = event->data.l[4];
if (src_indication > 1)
wwarning("_NET_WM_FULLSCREEN_MONITORS source indication %ld not supported", src_indication);
wFullscreenMonitorsWindow(wwin, top, bottom, left, right);
return True;
}
#else
}
#endif
#ifdef DEBUG_WMSPEC
wmessage("processClientMessage unsupported type %s", XGetAtomName(dpy, event->message_type));
#endif
return False;
}