diff options
| -rw-r--r-- | lispref/positions.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lispref/positions.texi b/lispref/positions.texi index d79c53d6f36..5e9abd359c6 100644 --- a/lispref/positions.texi +++ b/lispref/positions.texi @@ -528,6 +528,24 @@ The value returned is the window line number point has moved to, with the top line in the window numbered 0. @end deffn +@defun count-screen-lines &optional beg end count-final-newline window +This function returns the number of the screen lines occupied by the +text between positions @var{beg} and @var{end}. These arguments default +to the beginning and end of the accessible portion of the buffer. + +If region ends with a newline, it is significant if +@var{count-final-newline} is non-@code{nil}. Otherwise it is ignored. + +The argument @var{window} specifies the window used for obtaining +parameters such as width, horizontal scrolling, and so on. The default +is the selected window. + +Like @code{vertical-motion}, @code{count-screen-lines} always uses the +current buffer, regardless of which buffer is displayed in @var{window}. +This makes possible to use @code{count-screen-lines} in any buffer, +whether or not it is currently displayed in some window. +@end defun + @defun compute-motion from frompos to topos width offsets window This function scans the current buffer, calculating screen positions. It scans the buffer forward from position @var{from}, assuming that is |