Add drawing_box api

autoload/SpaceVim/api/data/string.vim

@@ -26,6 +26,31 @@ endfunction
 
 let s:file['fill'] = function('s:fill')
 
+function! s:fill_middle(str, length) abort
+  if strwidth(a:str) <= a:length
+    "return a:str . repeat(' ', a:length - strwidth(a:str))
+    let n = a:length - strwidth(a:str)
+    if n % 2 == 0
+      return repeat(' ', (a:length - strwidth(a:str))/2) . a:str . repeat(' ', (a:length - strwidth(a:str))/2)
+    else
+      return repeat(' ', (a:length - strwidth(a:str))/2) . a:str . repeat(' ', (a:length + 1 - strwidth(a:str))/2)
+    endif
+  else
+    let l = 0
+    for i in range(strchars(a:str) - 1)
+      if strwidth(strcharpart(a:str, 0, i)) > a:length
+        break
+      else
+        let l = i
+      endif
+    endfor
+    let str = strcharpart(a:str, 0, l)
+    return str . repeat(' ', a:length - strwidth(str))
+  endif
+endfunction
+
+let s:file['fill_middle'] = function('s:fill_middle')
+
 function! s:trim_start(str) abort
   return substitute(a:str, '^\s*', '', 'g')
 endfunction

autoload/SpaceVim/api/unicode/box.vim

@@ -76,6 +76,75 @@ endfunction
 
 let s:box['drawing_table'] = function('s:drawing_table')
 
+function! s:drawing_box(data, h, w, bw) abort
+  if &encoding ==# 'utf-8'
+    let top_left_corner = '╭'
+    let top_right_corner = '╮'
+    let bottom_left_corner = '╰'
+    let bottom_right_corner = '╯'
+    let side = '│'
+    let top_bottom_side = '─'
+    let middle = '┼'
+    let top_middle = '┬'
+    let left_middle = '├'
+    let right_middle = '┤'
+    let bottom_middle = '┴'
+  else
+    let top_left_corner = '*'
+    let top_right_corner = '*'
+    let bottom_left_corner = '*'
+    let bottom_right_corner = '*'
+    let side = '|'
+    let top_bottom_side = '-'
+    let middle = '*'
+    let top_middle = '*'
+    let left_middle = '*'
+    let right_middle = '*'
+    let bottom_middle = '*'
+  endif
+  let box = []
+  let top_line = top_left_corner
+        \ . repeat(repeat(top_bottom_side, a:bw) . top_middle, a:w - 1)
+        \ . repeat(top_bottom_side, a:bw)
+        \ . top_right_corner
+  let middle_line = left_middle
+        \ . repeat(repeat(top_bottom_side, a:bw) . middle, a:w - 1)
+        \ . repeat(top_bottom_side, a:bw)
+        \ . right_middle
+  let bottom_line = bottom_left_corner
+        \ . repeat(repeat(top_bottom_side, a:bw) . bottom_middle, a:w - 1)
+        \ . repeat(top_bottom_side, a:bw)
+        \ . bottom_right_corner
+  let empty_line = side
+        \ . repeat(repeat(' ', a:bw) . side, a:w)
+  call add(box, top_line)
+  let i = 0
+  let ls = 1
+  let line = side
+  for sel in a:data
+    let line .=s:string.fill_middle(sel, a:bw) . side
+    let i += 1
+    if i == a:w
+      call add(box, line)
+      call add(box, middle_line)
+      let ls += 1
+      let line = side
+      let i = 0
+    endif
+  endfor
+  if ls < a:h
+    for j in range(a:h - ls)
+      call add(box, empty_line)
+      call add(box, middle)
+    endfor
+  else
+    let box[-1] = bottom_line
+  endif
+  return join(box, "\n")
+endfunction
+
+let s:box['drawing_box'] = function('s:drawing_box')
+
 function! SpaceVim#api#unicode#box#get() abort
   return deepcopy(s:box)
 endfunction