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Code Issues Releases Activity

Set _NET_WM_WINDOW_OPACITY on outer window manager window also.

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* xterm.c (x_find_topmost_parent): New function.
(x_set_frame_alpha): Find topmost parent window with
x_find_topmost_parent and set the property there also.
(handle_one_xevent): Call x_set_frame_alpha on ReparentNotify.

Fixes: debbugs:9181
This commit is contained in:
Jan Djärv 2011-08-04 13:06:22 +02:00
parent eeec79cbfa
commit 99aaf75f7c
2 changed files with 44 additions and 1 deletions
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7
src/ChangeLog
View File

@ -1,3 +1,10 @@
2011-08-04 Jan Djärv <jan.h.d@swipnet.se>
* xterm.c (x_find_topmost_parent): New function.
(x_set_frame_alpha): Find topmost parent window with
x_find_topmost_parent and set the property there also (bug#9181).
(handle_one_xevent): Call x_set_frame_alpha on ReparentNotify.
2011-08-04 Paul Eggert <eggert@cs.ucla.edu>
* callproc.c (Fcall_process): Avoid vfork clobbering

38
src/xterm.c
View File

@ -442,6 +442,27 @@ x_display_info_for_display (Display *dpy)
return 0;
}
static Window
x_find_topmost_parent (struct frame *f)
{
struct x_output *x = f->output_data.x;
Window win = None, wi = x->parent_desc;
Display *dpy = FRAME_X_DISPLAY (f);
while (wi != FRAME_X_DISPLAY_INFO (f)->root_window)
{
Window root;
Window *children;
unsigned int nchildren;
win = wi;
XQueryTree (dpy, win, &root, &wi, &children, &nchildren);
XFree (children);
}
return win;
}
#define OPAQUE 0xffffffff
void
@ -453,6 +474,7 @@ x_set_frame_alpha (struct frame *f)
double alpha = 1.0;
double alpha_min = 1.0;
unsigned long opac;
Window parent;
if (dpyinfo->x_highlight_frame == f)
alpha = f->alpha[0];
@ -473,6 +495,19 @@ x_set_frame_alpha (struct frame *f)
opac = alpha * OPAQUE;
x_catch_errors (dpy);
/* If there is a parent from the window manager, put the property there
also, to work around broken window managers that fail to do that.
Do this unconditionally as this function is called on reparent when
alpha has not changed on the frame. */
parent = x_find_topmost_parent (f);
if (parent != None)
XChangeProperty (dpy, parent, dpyinfo->Xatom_net_wm_window_opacity,
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *) &opac, 1L);
/* return unless necessary */
{
unsigned char *data;
@ -480,7 +515,6 @@ x_set_frame_alpha (struct frame *f)
int rc, format;
unsigned long n, left;
x_catch_errors (dpy);
rc = XGetWindowProperty (dpy, win, dpyinfo->Xatom_net_wm_window_opacity,
0L, 1L, False, XA_CARDINAL,
&actual, &format, &n, &left,
@ -6088,6 +6122,8 @@ handle_one_xevent (struct x_display_info *dpyinfo, XEvent *eventptr,
/* Perhaps reparented due to a WM restart. Reset this. */
FRAME_X_DISPLAY_INFO (f)->wm_type = X_WMTYPE_UNKNOWN;
FRAME_X_DISPLAY_INFO (f)->net_supported_window = 0;
x_set_frame_alpha (f);
}
goto OTHER;