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Bug fix #302: Use more EWMH-compliant way to determine frame extents

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Bug fix: Select the larger of the X window border width and
_NET_FRAME_EXTENTS, instead of adding them together, when determining
the frame extents. (Supposedly) more EWMH compliant, as EWMH
_NET_FRAME_EXTENTS should include the X window border width already. We
did not choose to completely rely on _NET_FRAME_EXTENTS to remove the
need to keep track of whether there is a _NET_FRAME_EXTENTS, and
(hopefully) take care of some cases when it is wrong. The commit should
fix awesomeWM/awesome#425. Thanks to psychon for the information. (#302)

The commit fixes the bug in win_get_region_noframe() that the X window
border width is not considered when determining the width/height of the
window without frame, as well.
This commit is contained in:
Richard Grenville
2015-09-06 21:40:51 +08:00
parent 50317f75c7
commit c156abb0e8
2 changed files with 24 additions and 8 deletions
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18
src/compton.c
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@ -901,12 +901,13 @@ win_get_region(session_t *ps, win *w, bool use_offset) {
*/
static XserverRegion
win_get_region_noframe(session_t *ps, win *w, bool use_offset) {
const margin_t extents = win_calc_frame_extents(ps, w);
XRectangle r;
r.x = (use_offset ? w->a.x: 0) + w->a.border_width + w->frame_extents.left;
r.y = (use_offset ? w->a.y: 0) + w->a.border_width + w->frame_extents.top;
r.width = max_i(w->a.width - w->frame_extents.left - w->frame_extents.right, 0);
r.height = max_i(w->a.height - w->frame_extents.top - w->frame_extents.bottom, 0);
r.x = (use_offset ? w->a.x: 0) + extents.left;
r.y = (use_offset ? w->a.y: 0) + extents.top;
r.width = max_i(w->a.width - extents.left - extents.right, 0);
r.height = max_i(w->a.height - extents.top - extents.bottom, 0);
if (r.width > 0 && r.height > 0)
return XFixesCreateRegion(ps->dpy, &r, 1);
@ -1632,10 +1633,11 @@ win_paint_win(session_t *ps, win *w, XserverRegion reg_paint,
}
else {
// Painting parameters
const int t = w->a.border_width + w->frame_extents.top;
const int l = w->a.border_width + w->frame_extents.left;
const int b = w->a.border_width + w->frame_extents.bottom;
const int r = w->a.border_width + w->frame_extents.right;
const margin_t extents = win_calc_frame_extents(ps, w);
const int t = extents.top;
const int l = extents.left;
const int b = extents.bottom;
const int r = extents.right;
#define COMP_BDR(cx, cy, cwid, chei) \
win_render(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity, \