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# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
from . import win32
# from wincon.h
class WinColor(object):
BLACK = 0
BLUE = 1
GREEN = 2
CYAN = 3
RED = 4
MAGENTA = 5
YELLOW = 6
GREY = 7
# from wincon.h
class WinStyle(object):
NORMAL = 0x00 # dim text, dim background
BRIGHT = 0x08 # bright text, dim background
BRIGHT_BACKGROUND = 0x80 # dim text, bright background
class WinTerm(object):
def __init__(self):
self._default = win32.GetConsoleScreenBufferInfo(win32.STDOUT).wAttributes
self.set_attrs(self._default)
self._default_fore = self._fore
self._default_back = self._back
self._default_style = self._style
# In order to emulate LIGHT_EX in windows, we borrow the BRIGHT style.
# So that LIGHT_EX colors and BRIGHT style do not clobber each other,
# we track them separately, since LIGHT_EX is overwritten by Fore/Back
# and BRIGHT is overwritten by Style codes.
self._light = 0
def get_attrs(self):
return self._fore + self._back * 16 + (self._style | self._light)
def set_attrs(self, value):
self._fore = value & 7
self._back = (value >> 4) & 7
self._style = value & (WinStyle.BRIGHT | WinStyle.BRIGHT_BACKGROUND)
def reset_all(self, on_stderr=None):
self.set_attrs(self._default)
self.set_console(attrs=self._default)
self._light = 0
def fore(self, fore=None, light=False, on_stderr=False):
if fore is None:
fore = self._default_fore
self._fore = fore
# Emulate LIGHT_EX with BRIGHT Style
if light:
self._light |= WinStyle.BRIGHT
else:
self._light &= ~WinStyle.BRIGHT
self.set_console(on_stderr=on_stderr)
def back(self, back=None, light=False, on_stderr=False):
if back is None:
back = self._default_back
self._back = back
# Emulate LIGHT_EX with BRIGHT_BACKGROUND Style
if light:
self._light |= WinStyle.BRIGHT_BACKGROUND
else:
self._light &= ~WinStyle.BRIGHT_BACKGROUND
self.set_console(on_stderr=on_stderr)
def style(self, style=None, on_stderr=False):
if style is None:
style = self._default_style
self._style = style
self.set_console(on_stderr=on_stderr)
def set_console(self, attrs=None, on_stderr=False):
if attrs is None:
attrs = self.get_attrs()
handle = win32.STDOUT
if on_stderr:
handle = win32.STDERR
win32.SetConsoleTextAttribute(handle, attrs)
def get_position(self, handle):
position = win32.GetConsoleScreenBufferInfo(handle).dwCursorPosition
# Because Windows coordinates are 0-based,
# and win32.SetConsoleCursorPosition expects 1-based.
position.X += 1
position.Y += 1
return position
def set_cursor_position(self, position=None, on_stderr=False):
if position is None:
# I'm not currently tracking the position, so there is no default.
# position = self.get_position()
return
handle = win32.STDOUT
if on_stderr:
handle = win32.STDERR
win32.SetConsoleCursorPosition(handle, position)
def cursor_adjust(self, x, y, on_stderr=False):
handle = win32.STDOUT
if on_stderr:
handle = win32.STDERR
position = self.get_position(handle)
adjusted_position = (position.Y + y, position.X + x)
win32.SetConsoleCursorPosition(handle, adjusted_position, adjust=False)
def erase_screen(self, mode=0, on_stderr=False):
# 0 should clear from the cursor to the end of the screen.
# 1 should clear from the cursor to the beginning of the screen.
# 2 should clear the entire screen, and move cursor to (1,1)
handle = win32.STDOUT
if on_stderr:
handle = win32.STDERR
csbi = win32.GetConsoleScreenBufferInfo(handle)
# get the number of character cells in the current buffer
cells_in_screen = csbi.dwSize.X * csbi.dwSize.Y
# get number of character cells before current cursor position
cells_before_cursor = csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X
if mode == 0:
from_coord = csbi.dwCursorPosition
cells_to_erase = cells_in_screen - cells_before_cursor
elif mode == 1:
from_coord = win32.COORD(0, 0)
cells_to_erase = cells_before_cursor
elif mode == 2:
from_coord = win32.COORD(0, 0)
cells_to_erase = cells_in_screen
else:
# invalid mode
return
# fill the entire screen with blanks
win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
# now set the buffer's attributes accordingly
win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
if mode == 2:
# put the cursor where needed
win32.SetConsoleCursorPosition(handle, (1, 1))
def erase_line(self, mode=0, on_stderr=False):
# 0 should clear from the cursor to the end of the line.
# 1 should clear from the cursor to the beginning of the line.
# 2 should clear the entire line.
handle = win32.STDOUT
if on_stderr:
handle = win32.STDERR
csbi = win32.GetConsoleScreenBufferInfo(handle)
if mode == 0:
from_coord = csbi.dwCursorPosition
cells_to_erase = csbi.dwSize.X - csbi.dwCursorPosition.X
elif mode == 1:
from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
cells_to_erase = csbi.dwCursorPosition.X
elif mode == 2:
from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
cells_to_erase = csbi.dwSize.X
else:
# invalid mode
return
# fill the entire screen with blanks
win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
# now set the buffer's attributes accordingly
win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
def set_title(self, title):
win32.SetConsoleTitle(title)
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