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|
module Reline
VK_LMENU = 0xA4
STD_OUTPUT_HANDLE = -11
@@getwch = Win32API.new('msvcrt', '_getwch', [], 'I')
@@kbhit = Win32API.new('msvcrt', '_kbhit', [], 'I')
@@GetKeyState = Win32API.new('user32', 'GetKeyState', ['L'], 'L')
@@GetConsoleScreenBufferInfo = Win32API.new('kernel32', 'GetConsoleScreenBufferInfo', ['L', 'P'], 'L')
@@SetConsoleCursorPosition = Win32API.new('kernel32', 'SetConsoleCursorPosition', ['L', 'L'], 'L')
@@GetStdHandle = Win32API.new('kernel32', 'GetStdHandle', ['L'], 'L')
@@FillConsoleOutputCharacter = Win32API.new('kernel32', 'FillConsoleOutputCharacter', ['L', 'L', 'L', 'L', 'P'], 'L')
@@ScrollConsoleScreenBuffer = Win32API.new('kernel32', 'ScrollConsoleScreenBuffer', ['L', 'P', 'P', 'L', 'P'], 'L')
@@hConsoleHandle = @@GetStdHandle.call(STD_OUTPUT_HANDLE)
@@buf = []
def getwch
while @@kbhit.call == 0
sleep(0.001)
end
result = []
until @@kbhit.call == 0
ret = @@getwch.call
begin
result.concat(ret.chr(Encoding::UTF_8).encode(Encoding.default_external).bytes)
rescue Encoding::UndefinedConversionError
result << ret
result << @@getwch.call if ret == 224
end
end
result
end
def getc
unless @@buf.empty?
return @@buf.shift
end
input = getwch
alt = (@@GetKeyState.call(VK_LMENU) & 0x80) != 0
if input.size > 1
@@buf.concat(input)
else # single byte
case input[0]
when 0x00
getwch
alt = false
input = getwch
@@buf.concat(input)
when 0xE0
@@buf.concat(input)
input = getwch
@@buf.concat(input)
when 0x03
@@buf.concat(input)
else
@@buf.concat(input)
end
end
if alt
"\e".ord
else
@@buf.shift
end
end
def self.get_screen_size
csbi = 0.chr * 24
@@GetConsoleScreenBufferInfo.call(@@hConsoleHandle, csbi)
csbi[0, 4].unpack('SS')
end
def self.cursor_pos
csbi = 0.chr * 24
@@GetConsoleScreenBufferInfo.call(@@hConsoleHandle, csbi)
x = csbi[4, 2].unpack('s*').first
y = csbi[6, 4].unpack('s*').first
CursorPos.new(x, y)
end
def self.move_cursor_column(val)
@@SetConsoleCursorPosition.call(@@hConsoleHandle, cursor_pos.y * 65536 + val)
end
def self.move_cursor_up(val)
if val > 0
@@SetConsoleCursorPosition.call(@@hConsoleHandle, (cursor_pos.y - val) * 65536 + cursor_pos.x)
elsif val < 0
move_cursor_down(-val)
end
end
def self.move_cursor_down(val)
if val > 0
@@SetConsoleCursorPosition.call(@@hConsoleHandle, (cursor_pos.y + val) * 65536 + cursor_pos.x)
elsif val < 0
move_cursor_up(-val)
end
end
def self.erase_after_cursor
csbi = 0.chr * 24
@@GetConsoleScreenBufferInfo.call(@@hConsoleHandle, csbi)
cursor = csbi[4, 4].unpack('L').first
written = 0.chr * 4
@@FillConsoleOutputCharacter.call(@@hConsoleHandle, 0x20, get_screen_size.first - cursor_pos.x, cursor, written)
end
def self.scroll_down(val)
return if val.zero?
scroll_rectangle = [0, val, get_screen_size.last, get_screen_size.first].pack('s4')
destination_origin = 0 # y * 65536 + x
fill = [' '.ord, 0].pack('SS')
@@ScrollConsoleScreenBuffer.call(@@hConsoleHandle, scroll_rectangle, nil, destination_origin, fill)
end
def self.clear_screen
# TODO: Use FillConsoleOutputCharacter and FillConsoleOutputAttribute
print "\e[2J"
print "\e[1;1H"
end
def self.set_screen_size(rows, columns)
raise NotImplementedError
end
def prep
# do nothing
nil
end
def deprep(otio)
# do nothing
end
end
|
