1 files changed, 64 insertions, 0 deletions
diff --git a/src/testdir/view_util.vim b/src/testdir/view_util.vim
new file mode 100644
index 0000000..1cdce21
--- /dev/null
+++ b/src/testdir/view_util.vim
@@ -0,0 +1,64 @@
+" Functions about view shared by several tests
+
+" Only load this script once.
+if exists('*Screenline')
+  finish
+endif
+
+" Get line "lnum" as displayed on the screen.
+" Trailing white space is trimmed.
+func Screenline(lnum)
+  let chars = []
+  for c in range(1, winwidth(0))
+    call add(chars, nr2char(screenchar(a:lnum, c)))
+  endfor
+  let line = join(chars, '')
+  return matchstr(line, '^.\{-}\ze\s*$')
+endfunc
+
+" Get text on the screen, including composing characters.
+" ScreenLines(lnum, width) or
+" ScreenLines([start, end], width)
+function! ScreenLines(lnum, width) abort
+  redraw!
+  if type(a:lnum) == v:t_list
+    let start = a:lnum[0]
+    let end = a:lnum[1]
+  else
+    let start = a:lnum
+    let end = a:lnum
+  endif
+  let lines = []
+  for l in range(start, end)
+    let lines += [join(map(range(1, a:width), 'screenstring(l, v:val)'), '')]
+  endfor
+  return lines
+endfunction
+
+function! ScreenAttrs(lnum, width) abort
+  redraw!
+  if type(a:lnum) == v:t_list
+    let start = a:lnum[0]
+    let end = a:lnum[1]
+  else
+    let start = a:lnum
+    let end = a:lnum
+  endif
+  let attrs = []
+  for l in range(start, end)
+    let attrs += [map(range(1, a:width), 'screenattr(l, v:val)')]
+  endfor
+  return attrs
+endfunction
+
+function! NewWindow(height, width) abort
+  exe a:height . 'new'
+  exe a:width . 'vsp'
+  set winfixwidth winfixheight
+  redraw!
+endfunction
+
+function! CloseWindow() abort
+  bw!
+  redraw!
+endfunction