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Filename :
winterm.py
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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 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 def get_attrs(self): return self._fore + self._back * 16 + self._style def set_attrs(self, value): self._fore = value & 7 self._back = (value >> 4) & 7 self._style = value & WinStyle.BRIGHT def reset_all(self, on_stderr=None): self.set_attrs(self._default) self.set_console(attrs=self._default) def fore(self, fore=None, on_stderr=False): if fore is None: fore = self._default_fore self._fore = fore self.set_console(on_stderr=on_stderr) def back(self, back=None, on_stderr=False): if back is None: back = self._default_back self._back = back 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_up(self, num_rows=0, on_stderr=False): if num_rows == 0: return handle = win32.STDOUT if on_stderr: handle = win32.STDERR position = self.get_position(handle) adjusted_position = (position.Y - num_rows, position.X) self.set_cursor_position(adjusted_position, on_stderr) def erase_data(self, mode=0, on_stderr=False): # 0 (or None) 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 maybe move cursor to (1,1)?) # # At the moment, I only support mode 2. From looking at the API, it # should be possible to calculate a different number of bytes to clear, # and to do so relative to the cursor position. if mode[0] not in (2,): return handle = win32.STDOUT if on_stderr: handle = win32.STDERR # here's where we'll home the cursor coord_screen = win32.COORD(0,0) csbi = win32.GetConsoleScreenBufferInfo(handle) # get the number of character cells in the current buffer dw_con_size = csbi.dwSize.X * csbi.dwSize.Y # fill the entire screen with blanks win32.FillConsoleOutputCharacter(handle, ' ', dw_con_size, coord_screen) # now set the buffer's attributes accordingly win32.FillConsoleOutputAttribute(handle, self.get_attrs(), dw_con_size, coord_screen ); # put the cursor at (0, 0) win32.SetConsoleCursorPosition(handle, (coord_screen.X, coord_screen.Y))