commit 03cd697d635f1b0e7ffe21cf8244a8fb755f2ddb
author zeertzjq <zeertzjq@outlook.com> Wed Sep 20 20:08:40 2023 +0200
committer Christian Brabandt <cb@256bit.org> Wed Sep 20 20:08:40 2023 +0200
tree d856a22b0fc6373c66b20b182705ac14cc767c49
parent 5790a54166793554d16f6a85d8824632860b8b37

patch 9.0.1919: Wrong curswant when clicking on empty line or with vsplits

Problem:  Wrong curswant when clicking on empty line or with vsplits.
Solution: Don't check for ScreenCols[] before the start of the window
          and handle empty line properly.

closes: #13132

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>

src/testdir/test_normal.vim

diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index 9111eb8..c7d37f0 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -4104,6 +4104,39 @@
   let &mouse = save_mouse
 endfunc
 
+func Test_normal_click_on_empty_line()
+  let save_mouse = &mouse
+  set mouse=a
+  botright new
+  call setline(1, ['', '', ''])
+  let row = win_screenpos(0)[0] + 2
+  20vsplit
+  redraw
+
+  call test_setmouse(row, 1)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 1], getcurpos())
+  call test_setmouse(row, 2)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 2], getcurpos())
+  call test_setmouse(row, 10)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 10], getcurpos())
+
+  call test_setmouse(row, 21 + 1)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 1], getcurpos())
+  call test_setmouse(row, 21 + 2)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 2], getcurpos())
+  call test_setmouse(row, 21 + 10)
+  call feedkeys("\<LeftMouse>", 'xt')
+  call assert_equal([0, 3, 1, 0, 10], getcurpos())
+
+  bwipe!
+  let &mouse = save_mouse
+endfunc
+
 func Test_normal33_g_cmd_nonblank()
   " Test that g<End> goes to the last non-blank char and g$ to the last
   " visible column