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fix(grid): check allocated grid size when suspicious scrolling

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fixes #33749
This commit is contained in:
bfredl
2025-05-01 21:09:38 +02:00
parent 40351bbbbe
commit 1ad9cdd403
1 changed files with 12 additions and 7 deletions
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19
src/nvim/drawscreen.c
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@ -2527,21 +2527,26 @@ void win_scroll_lines(win_T *wp, int row, int line_count)
return;
}
// No lines are being moved, just draw over the entire area
if (row + abs(line_count) >= wp->w_view_height) {
return;
}
int col = 0;
int row_off = 0;
ScreenGrid *grid = grid_adjust(&wp->w_grid, &row_off, &col);
// TODO(bfredl): this is due to the call in curs_columns(). We really don't want to
// fiddle with the screen outside of update_screen() like this.
int checked_width = MIN(grid->cols - col, wp->w_view_width);
int checked_height = MIN(grid->rows - row_off, wp->w_view_height);
// No lines are being moved, just draw over the entire area
if (row + abs(line_count) >= checked_height) {
return;
}
if (line_count < 0) {
grid_del_lines(grid, row + row_off, -line_count,
wp->w_view_height + row_off, col, wp->w_view_width);
checked_height + row_off, col, checked_width);
} else {
grid_ins_lines(grid, row + row_off, line_count,
wp->w_view_height + row_off, col, wp->w_view_width);
checked_height + row_off, col, checked_width);
}
}