module Clipboard::Windows

Constants

CF_TEXT
CF_UNICODETEXT
GMEM_MOVEABLE

Public Instance Methods

clear(**) click to toggle source
# File lib/clipboard/windows.rb, line 62
def clear(**)
  User32.empty if User32.open(nil)

  true
ensure
  User32.close
end
copy(data_to_copy, **) click to toggle source
# File lib/clipboard/windows.rb, line 70
def copy(data_to_copy, **)
  if User32.open(nil)
    User32.empty
    data = data_to_copy.encode(Encoding::UTF_16LE) # TODO: catch bad encodings
    data << 0
    handler = Kernel32.alloc( GMEM_MOVEABLE, data.bytesize )
    pointer_to_data = Kernel32.lock( handler )
    begin
      pointer_to_data.write_string( data )
    ensure
      Kernel32.unlock( handler )
    end
    User32.set( CF_UNICODETEXT, handler )
  else # don't touch anything
    Utils.popen "clip", data_to_copy # depends on clip (available by default since Vista)
  end

  true
ensure
  User32.close
end
paste(_ = nil, **) click to toggle source

see www.codeproject.com/KB/clipboard/archerclipboard1.aspx

# File lib/clipboard/windows.rb, line 46
def paste(_ = nil, **)
  return String.new unless User32.open(nil)

  hclip = User32.get( CF_UNICODETEXT )
  return String.new if hclip.null?

  pointer_to_data = Kernel32.lock( hclip )
  # Windows Unicode is ended by two null bytes, so get the whole string
  size = Kernel32.size( hclip )
  data = pointer_to_data.read_string( size - 2 )
  data.force_encoding(Encoding::UTF_16LE)
ensure
  Kernel32.unlock(hclip) if hclip && !hclip.null?
  User32.close
end