is an alias for `previous-single-char-property-change
' in `
(allout-previous-single-char-property-change POSITION PROP
&optional OBJECT LIMIT
Return the position of previous text property or overlay change for a specific property.
Scans characters backward from POSITION
till it finds
a change in the PROP
property, then returns the position of the change.
If the optional third argument OBJECT
is a buffer (or nil, which means
the current buffer), POSITION
is a buffer position (integer or marker).
is a string, POSITION
is a 0-based index into it.
In a string, scan runs to the start of the string.
In a buffer, it runs to (point-min), and the value cannot be less than that.
The property values are compared with `eq'.
If the property is constant all the way to the start of OBJECT
, return the
first valid position in OBJECT
If the optional fourth argument LIMIT
is non-nil, don't search back past
; return LIMIT
if nothing is found before reaching LIMIT