Working on a plugin for detecting tab indent

1 files changed, 53 insertions, 0 deletions

diff --git a/vim/plugin/detect_indent.vim b/vim/plugin/detect_indent.vim
new file mode 100644
index 00000000..baee0db5
--- /dev/null
+++ b/vim/plugin/detect_indent.vim
@@ -0,0 +1,53 @@
+function Count() abort
+  let spaces = {
+        \ 'histogram': {},
+        \ 'total': 0,
+        \}
+  let tabs = 0
+  let total = line('$')
+  for lnum in range(1, total)
+    let line = getline(lnum)
+    let tabs += matchstr(line, '^\t*') != ''
+    let ls = strlen(matchstr(line, '^ *'))
+    if ls == 0
+      continue
+    endif
+    if !has_key(spaces['histogram'], ls)
+      let spaces['histogram'][ls] = 0
+    endif
+    let spaces['histogram'][ls] += 1
+    let spaces['total'] += 1
+  endfor
+  setlocal
+
+  echo spaces
+  echo tabs
+
+  if tabs > spaces['total'] * 5
+    echo 'TABS'
+    setlocal noexpandtab shiftwidth=0 softtabstop=-1
+  elseif spaces['total'] > tabs * 5
+    echo 'SPACES'
+    let set = []
+    for ls in keys(spaces['histogram'])
+      if spaces['histogram'][ls] * 100 / spaces['total'] >= 10
+        call add(set, ls)
+      endif
+    endfor
+    for div in range(1, max(set))
+      for ls in set
+        if ls % div != 0
+          break
+        endif
+        let gcd = div
+      endfor
+    endfor
+    echo gcd
+    echo set
+  else
+    echo 'UNCLEAR'
+  endif
+
+endfunction
+
+autocmd FileType * call Count()