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Support _NET_FRAME_EXTENTS.

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This patch adds support for the _NET_FRAME_EXTENTS property as
described in the EWMH spec.  With it I was able to use the compton
compositing manager to draw fully opaque windows with semi-transparent
titlebars and resizebars.

Set the _NET_FRAME_EXTENTS property based on border widths and
titlebar/resizebar heights.

The EWMH spec says:

"_NET_FRAME_EXTENTS, left, right, top, bottom, CARDINAL[4]/32

The Window Manager MUST set _NET_FRAME_EXTENTS to the extents of the
window's frame.  left, right, top and bottom are widths of the
respective borders added by the Window Manager."
This commit is contained in:
Iain Patterson
2012-07-04 08:31:39 +01:00
committed by Carlos R. Mafra
parent 81eefca4ef
commit 347d6f9fda
3 changed files with 33 additions and 0 deletions
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29
src/wmspec.c
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@@ -120,6 +120,8 @@ 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_frame_extents;
/* Window Manager Protocols */
static Atom net_wm_ping; /* TODO */
@@ -193,6 +195,8 @@ static atomitem_t atomNames[] = {
{"_NET_WM_PID", &net_wm_pid},
{"_NET_WM_HANDLED_ICONS", &net_wm_handled_icons},
{"_NET_FRAME_EXTENTS", &net_frame_extents},
{"_NET_WM_PING", &net_wm_ping},
{"UTF8_STRING", &utf8_string},
@@ -294,6 +298,8 @@ static void setSupportedHints(WScreen * scr)
atom[i++] = net_wm_icon;
atom[i++] = net_wm_handled_icons;
atom[i++] = net_frame_extents;
atom[i++] = net_wm_name;
atom[i++] = net_wm_icon_name;
@@ -1605,3 +1611,26 @@ static void wsobserver(void *self, WMNotification * notif)
updateWorkspaceNames(scr);
}
}
void wNETFrameExtents(WWindow *wwin)
{
long extents[4] = { 0, 0, 0, 0 };
/* The extents array describes dimensions which are not
* part of the client window. In our case that means
* widths of the border and heights of the titlebar and resizebar.
*
* Index 0 = left
* 1 = right
* 2 = top
* 3 = bottom
*/
if (!wwin->client_flags.no_border)
extents[0] = extents[1] = FRAME_BORDER_WIDTH;
if (wwin->frame->titlebar)
extents[2] = wwin->frame->titlebar->height;
if (wwin->frame->resizebar)
extents[3] = wwin->frame->resizebar->height;
XChangeProperty(dpy, wwin->client_win, net_frame_extents, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) extents, 4);
}