Function RangeVisibleInBuffer

python/ycm/vimsupport.py:192–241

( bufnr, grow_factor=0.5 )

# tab page for the supplied buffer number. By default this range is then
# extended by half of the resulting range size
def RangeVisibleInBuffer( bufnr, grow_factor=0.5 ):
  windows = [ w for w in vim.eval( f'win_findbuf( { bufnr } )' )
              if GetIntValue( vim.eval( f'win_id2tabwin( { w } )[ 0 ]' ) ) ==
                vim.current.tabpage.number ]

  class Location:
    line: int = None
    col: int = None

  class Range:
    start: Location = Location()
    end: Location = Location()

  try:
    buffer = vim.buffers[ bufnr ]
  except KeyError:
    return None

  if not windows:
    return None

  r = Range()
  # Note, for this we ignore horizontal scrolling
  for winid in windows:
    win_info = vim.eval( f'getwininfo( { winid } )[ 0 ]' )
    if r.start.line is None or r.start.line > int( win_info[ 'topline' ] ):
      r.start.line = int( win_info[ 'topline' ] )
    if r.end.line is None or r.end.line < int( win_info[ 'botline' ] ):
      r.end.line = int( win_info[ 'botline' ] )

  # Extend the range by 1 factor, and calculate the columns
  num_lines = r.end.line - r.start.line + 1
  r.start.line = max( r.start.line - int( num_lines * grow_factor ), 1 )
  r.start.col = 1
  r.end.line = min( r.end.line + int( num_lines * grow_factor ), len( buffer ) )
  r.end.col = len( buffer[ r.end.line - 1 ] )

  filepath = GetBufferFilepath( buffer )
  return {
    'start': {
      'line_num': r.start.line,
      'column_num': r.start.col,
      'filepath': filepath,
    },
    'end': {
      'line_num': r.end.line,
      'column_num': r.end.col,
      'filepath': filepath,
    }
  }


def VisibleRangeOfBufferOverlaps( bufnr, expanded_range ):