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Attempt to fix get window monitor

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This commit is contained in:
Chris Lee 2021-11-14 10:24:14 +01:00
parent a4996c84bd
commit 2ed026ba32
2 changed files with 27 additions and 17 deletions
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1
ChangeLog
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@ -1,3 +1,4 @@
2021-10-14 master
2021-05-29 17.0.1
- Fixes:
- Crash on panel cleanup in single-monitor execp (issue #801)

41
src/util/window.c
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@ -169,31 +169,40 @@ int get_window_desktop(Window win)
return best_match;
}
#define swap(a, b) do { __typeof__(a) _tmp = (a); (a) = (b); (b) = _tmp; } while(0)
int get_interval_overlap(int a1, int a2, int b1, int b2)
{
if (a1 > b1) {
swap(a1, b1);
swap(a2, b2);
}
if (b1 <= a2)
return a2 - b1;
return 0;
}
int get_window_monitor(Window win)
{
int x, y, w, h;
get_window_coordinates(win, &x, &y, &w, &h);
int best_match = -1;
int match_right = 0;
int match_bottom = 0;
// There is an ambiguity when a window is right on the edge between screens.
// In that case, prefer the monitor which is on the right and bottom of the window's top-left corner.
int best_match = 0;
int best_area = -1;
for (int i = 0; i < server.num_monitors; i++) {
if (x >= server.monitors[i].x && x <= (server.monitors[i].x + server.monitors[i].width) &&
y >= server.monitors[i].y && y <= (server.monitors[i].y + server.monitors[i].height)) {
int current_right = x < (server.monitors[i].x + server.monitors[i].width);
int current_bottom = y < (server.monitors[i].y + server.monitors[i].height);
if (best_match < 0 || (!match_right && current_right) || (!match_bottom && current_bottom)) {
int commonx = get_interval_overlap(x, x + w, server.monitors[i].x, server.monitors[i].x + server.monitors[i].width);
int commony = get_interval_overlap(y, y + h, server.monitors[i].y, server.monitors[i].y + server.monitors[i].height);
int area = commonx * commony;
if (0)
printf("Monitor %d (%dx%d+%dx%d): win (%dx%d+%dx%d) area %dx%d=%d\n",
i, server.monitors[i].x, server.monitors[i].y, server.monitors[i].width, server.monitors[i].height,
x, y, w, h,
commonx, commony, area);
if (area > best_area) {
best_area = area;
best_match = i;
}
}
}
if (best_match < 0)
best_match = 0;
// fprintf(stderr, "tint2: desktop %d, window %lx %s : monitor %d, (%d, %d)\n", 1 + get_current_desktop(), win,
// get_task(win) ? get_task(win)->title : "??", best_match+1, x, y);
return best_match;
}