docview: prevent overscroll when DocView size is less than lh * 2 (li…

…te-xl#1971)
takase1121 · Dec 2, 2024 · 36db156 · 36db156
1 parent 67752e1
commit 36db156
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/data/core/docview.lua b/data/core/docview.lua
@@ -264,7 +264,8 @@ function DocView:scroll_to_make_visible(line, col)
   local _, ly = self:get_line_screen_position(line, col)
   local lh = self:get_line_height()
   local _, _, _, scroll_h = self.h_scrollbar:get_track_rect()
-  self.scroll.to.y = common.clamp(self.scroll.to.y, ly - oy - self.size.y + scroll_h + lh * 2, ly - oy - lh)
+  local overscroll = math.min(lh * 2, self.size.y) -- always show the previous / next line when possible
+  self.scroll.to.y = common.clamp(self.scroll.to.y, ly - oy - self.size.y + scroll_h + overscroll, ly - oy - lh)
   local gw = self:get_gutter_width()
   local xoffset = self:get_col_x_offset(line, col)
   local xmargin = 3 * self:get_font():get_width(' ')