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Allow to disable display of line numbers beyond EOB

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* src/buffer.c (disable_line_numbers_overlay_at_eob): New
function.
* src/lisp.h (disable_line_numbers_overlay_at_eob): Add prototype.
* src/xdisp.c (should_produce_line_number): When at ZV, call
disable_line_numbers_overlay_at_eob to determine whether line
numbers should be displayed beyond ZV.
This commit is contained in:
Eli Zaretskii 2017-06-25 20:53:05 +03:00
parent 540669cda9
commit 5d1025e716
3 changed files with 37 additions and 4 deletions
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27
src/buffer.c
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@ -3054,6 +3054,33 @@ mouse_face_overlay_overlaps (Lisp_Object overlay)
return i < n;
}
/* Return the value of the 'display-line-numbers-disable' property at
EOB, if there's an overlay at ZV with a non-nil value of that property. */
Lisp_Object
disable_line_numbers_overlay_at_eob (void)
{
ptrdiff_t n, i, size;
Lisp_Object *v, tem = Qnil;
Lisp_Object vbuf[10];
USE_SAFE_ALLOCA;
size = ARRAYELTS (vbuf);
v = vbuf;
n = overlays_in (ZV, ZV, 0, &v, &size, NULL, NULL);
if (n > size)
{
SAFE_NALLOCA (v, 1, n);
overlays_in (ZV, ZV, 0, &v, &n, NULL, NULL);
}
for (i = 0; i < n; ++i)
if ((tem = Foverlay_get (v[i], Qdisplay_line_numbers_disable),
!NILP (tem)))
break;
SAFE_FREE ();
return tem;
}
/* Fast function to just test if we're at an overlay boundary. */