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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
View file

@ -901,12 +901,13 @@ win_get_region(session_t *ps, win *w, bool use_offset) {
*/ */
static XserverRegion static XserverRegion
win_get_region_noframe(session_t *ps, win *w, bool use_offset) { win_get_region_noframe(session_t *ps, win *w, bool use_offset) {
const margin_t extents = win_calc_frame_extents(ps, w);
XRectangle r; XRectangle r;
r.x = (use_offset ? w->a.x: 0) + w->a.border_width + w->frame_extents.left; r.x = (use_offset ? w->a.x: 0) + extents.left;
r.y = (use_offset ? w->a.y: 0) + w->a.border_width + w->frame_extents.top; r.y = (use_offset ? w->a.y: 0) + extents.top;
r.width = max_i(w->a.width - w->frame_extents.left - w->frame_extents.right, 0); r.width = max_i(w->a.width - extents.left - extents.right, 0);
r.height = max_i(w->a.height - w->frame_extents.top - w->frame_extents.bottom, 0); r.height = max_i(w->a.height - extents.top - extents.bottom, 0);
if (r.width > 0 && r.height > 0) if (r.width > 0 && r.height > 0)
return XFixesCreateRegion(ps->dpy, &r, 1); return XFixesCreateRegion(ps->dpy, &r, 1);
@ -1632,10 +1633,11 @@ win_paint_win(session_t *ps, win *w, XserverRegion reg_paint,
} }
else { else {
// Painting parameters // Painting parameters
const int t = w->a.border_width + w->frame_extents.top; const margin_t extents = win_calc_frame_extents(ps, w);
const int l = w->a.border_width + w->frame_extents.left; const int t = extents.top;
const int b = w->a.border_width + w->frame_extents.bottom; const int l = extents.left;
const int r = w->a.border_width + w->frame_extents.right; const int b = extents.bottom;
const int r = extents.right;
#define COMP_BDR(cx, cy, cwid, chei) \ #define COMP_BDR(cx, cy, cwid, chei) \
win_render(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity, \ win_render(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity, \

14
src/compton.h
View file

@ -507,6 +507,20 @@ win_has_frame(const win *w) {
|| w->frame_extents.right || w->frame_extents.bottom; || w->frame_extents.right || w->frame_extents.bottom;
} }
/**
* Calculate the extents of the frame of the given window based on EWMH
* _NET_FRAME_EXTENTS and the X window border width.
*/
static inline margin_t __attribute__((pure))
win_calc_frame_extents(session_t *ps, const win *w) {
margin_t result = w->frame_extents;
result.top = max_i(result.top, w->a.border_width);
result.left = max_i(result.left, w->a.border_width);
result.bottom = max_i(result.bottom, w->a.border_width);
result.right = max_i(result.right, w->a.border_width);
return result;
}
static inline void static inline void
wid_set_opacity_prop(session_t *ps, Window wid, opacity_t val) { wid_set_opacity_prop(session_t *ps, Window wid, opacity_t val) {
const unsigned long v = val; const unsigned long v = val;