Mercurial > hg > xemacs-beta
comparison man/lispref/positions.texi @ 290:c9fe270a4101 r21-0b43
Import from CVS: tag r21-0b43
| author | cvs |
|---|---|
| date | Mon, 13 Aug 2007 10:36:47 +0200 |
| parents | 7df0dd720c89 |
| children | 6cb5e14cd98e |
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| 289:6e6992ccc4b6 | 290:c9fe270a4101 |
|---|---|
| 470 use them heavily, Emacs provides caches which may improve the | 470 use them heavily, Emacs provides caches which may improve the |
| 471 performance of your code. @xref{Text Lines, cache-long-line-scans}. | 471 performance of your code. @xref{Text Lines, cache-long-line-scans}. |
| 472 | 472 |
| 473 | 473 |
| 474 @defun vertical-motion count &optional window | 474 @defun vertical-motion count &optional window |
| 475 This function moves point to the start of the screen line @var{count} | 475 This function moves point to the start of the frame line @var{count} |
| 476 screen lines down from the screen line containing point. If @var{count} | 476 frame lines down from the frame line containing point. If @var{count} |
| 477 is negative, it moves up instead. | 477 is negative, it moves up instead. |
| 478 | 478 |
| 479 @code{vertical-motion} returns the number of lines moved. The value may | 479 @code{vertical-motion} returns the number of lines moved. The value may |
| 480 be less in absolute value than @var{count} if the beginning or end of | 480 be less in absolute value than @var{count} if the beginning or end of |
| 481 the buffer was reached. | 481 the buffer was reached. |
| 482 | 482 |
| 483 The window @var{window} is used for obtaining parameters such as the | 483 Note that @code{vertical-motion} sets @var{window}'s buffer's point, not |
| 484 width, the horizontal scrolling, and the display table. But | 484 @var{window}'s point. (This differs from FSF Emacs, which buggily always |
| 485 @code{vertical-motion} always operates on the current buffer, even if | 485 sets current buffer's point, regardless of @var{window}.) |
| 486 @var{window} currently displays some other buffer. | 486 @end defun |
| 487 | |
| 488 @defun vertical-motion-pixels count &optional window | |
| 489 This function is identical to @code{vertical-motion}, except that it | |
| 490 returns the vertical pixel height of the motino which took place, | |
| 491 instead of the actual number of lines moved. A motion of zero lines | |
| 492 returns the height of the current line. | |
| 487 @end defun | 493 @end defun |
| 488 | 494 |
| 489 @deffn Command move-to-window-line count &optional window | 495 @deffn Command move-to-window-line count &optional window |
| 490 This function moves point with respect to the text currently displayed | 496 This function moves point with respect to the text currently displayed |
| 491 in @var{window}, which defaults to the selected window. It moves point | 497 in @var{window}, which defaults to the selected window. It moves point |