diff options
Diffstat (limited to 'lisp/pixel-scroll.el')
| -rw-r--r-- | lisp/pixel-scroll.el | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lisp/pixel-scroll.el b/lisp/pixel-scroll.el index cc0e159faef..68dc0fb94b3 100644 --- a/lisp/pixel-scroll.el +++ b/lisp/pixel-scroll.el @@ -132,8 +132,10 @@ This is an alternative of `scroll-up'. Scope moves downward." (pixel-line-height)))) (if (pixel-eob-at-top-p) ; when end-of-the-buffer is close (scroll-up 1) ; relay on robust method - (while (pixel-point-at-top-p amt) ; prevent too late (multi tries) - (vertical-motion 1)) ; move point downward + (catch 'no-movement + (while (pixel-point-at-top-p amt) ; prevent too late (multi tries) + (unless (>= (vertical-motion 1) 1) ; move point downward + (throw 'no-movement nil)))) ; exit loop when point did not move (pixel-scroll-pixel-up amt)))))) ; move scope downward (defun pixel-scroll-down (&optional arg) @@ -149,8 +151,10 @@ This is and alternative of `scroll-down'. Scope moves upward." pixel-resolution-fine-flag (frame-char-height)) (pixel-line-height -1)))) - (while (pixel-point-at-bottom-p amt) ; prevent too late (multi tries) - (vertical-motion -1)) ; move point upward + (catch 'no-movement + (while (pixel-point-at-bottom-p amt) ; prevent too late (multi tries) + (unless (<= (vertical-motion -1) -1) ; move point upward + (throw 'no-movement nil)))) ; exit loop when point did not move (if (or (pixel-bob-at-top-p amt) ; when beginning-of-the-buffer is seen (pixel-eob-at-top-p)) ; for file with a long line (scroll-down 1) ; relay on robust method |