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patch 8.1.2032: scrollbar thumb wrong in popup window

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Problem:    Scrollbar thumb wrong in popup window.
Solution:   Adjust thumb size and position when scrolled.
This commit is contained in:
Bram Moolenaar
2019-09-14 22:23:29 +02:00
parent 5babc6e858
commit 076d98839c
3 changed files with 12 additions and 5 deletions
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11
src/popupwin.c
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@@ -3363,10 +3363,12 @@ update_popups(void (*win_update)(win_T *wp))
// Compute scrollbar thumb position and size.
if (wp->w_has_scrollbar)
{
linenr_T linecount = wp->w_buffer->b_ml.ml_line_count;
linenr_T linecount = wp->w_buffer->b_ml.ml_line_count;
int height = wp->w_height;
sb_thumb_height = (wp->w_height * wp->w_height + linecount / 2)
/ linecount;
sb_thumb_height = (height * height + linecount / 2) / linecount;
if (wp->w_topline > 1 && sb_thumb_height == height)
--sb_thumb_height; // scrolled, no full thumb
if (sb_thumb_height == 0)
sb_thumb_height = 1;
if (linecount <= wp->w_height)
@@ -3377,6 +3379,9 @@ update_popups(void (*win_update)(win_T *wp))
+ (linecount / wp->w_height) / 2)
* (wp->w_height - sb_thumb_height)
/ (linecount - wp->w_height);
if (wp->w_topline > 1 && sb_thumb_top == 0 && height > 1)
sb_thumb_top = 1; // show it's scrolled
if (wp->w_scrollbar_highlight != NULL)
attr_scroll = syn_name2attr(wp->w_scrollbar_highlight);
else