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win32.py
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# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file. # from winbase.h STDOUT = -11 STDERR = -12 try: import ctypes from ctypes import LibraryLoader windll = LibraryLoader(ctypes.WinDLL) from ctypes import wintypes except (AttributeError, ImportError): windll = None SetConsoleTextAttribute = lambda *_: None winapi_test = lambda *_: None else: from ctypes import byref, Structure, c_char, POINTER COORD = wintypes._COORD class CONSOLE_SCREEN_BUFFER_INFO(Structure): """struct in wincon.h.""" _fields_ = [ ("dwSize", COORD), ("dwCursorPosition", COORD), ("wAttributes", wintypes.WORD), ("srWindow", wintypes.SMALL_RECT), ("dwMaximumWindowSize", COORD), ] def __str__(self): return '(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)' % ( self.dwSize.Y, self.dwSize.X , self.dwCursorPosition.Y, self.dwCursorPosition.X , self.wAttributes , self.srWindow.Top, self.srWindow.Left, self.srWindow.Bottom, self.srWindow.Right , self.dwMaximumWindowSize.Y, self.dwMaximumWindowSize.X ) _GetStdHandle = windll.kernel32.GetStdHandle _GetStdHandle.argtypes = [ wintypes.DWORD, ] _GetStdHandle.restype = wintypes.HANDLE _GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo _GetConsoleScreenBufferInfo.argtypes = [ wintypes.HANDLE, POINTER(CONSOLE_SCREEN_BUFFER_INFO), ] _GetConsoleScreenBufferInfo.restype = wintypes.BOOL _SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute _SetConsoleTextAttribute.argtypes = [ wintypes.HANDLE, wintypes.WORD, ] _SetConsoleTextAttribute.restype = wintypes.BOOL _SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition _SetConsoleCursorPosition.argtypes = [ wintypes.HANDLE, COORD, ] _SetConsoleCursorPosition.restype = wintypes.BOOL _FillConsoleOutputCharacterA = windll.kernel32.FillConsoleOutputCharacterA _FillConsoleOutputCharacterA.argtypes = [ wintypes.HANDLE, c_char, wintypes.DWORD, COORD, POINTER(wintypes.DWORD), ] _FillConsoleOutputCharacterA.restype = wintypes.BOOL _FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute _FillConsoleOutputAttribute.argtypes = [ wintypes.HANDLE, wintypes.WORD, wintypes.DWORD, COORD, POINTER(wintypes.DWORD), ] _FillConsoleOutputAttribute.restype = wintypes.BOOL _SetConsoleTitleW = windll.kernel32.SetConsoleTitleW _SetConsoleTitleW.argtypes = [ wintypes.LPCWSTR ] _SetConsoleTitleW.restype = wintypes.BOOL def _winapi_test(handle): csbi = CONSOLE_SCREEN_BUFFER_INFO() success = _GetConsoleScreenBufferInfo( handle, byref(csbi)) return bool(success) def winapi_test(): return any(_winapi_test(h) for h in (_GetStdHandle(STDOUT), _GetStdHandle(STDERR))) def GetConsoleScreenBufferInfo(stream_id=STDOUT): handle = _GetStdHandle(stream_id) csbi = CONSOLE_SCREEN_BUFFER_INFO() success = _GetConsoleScreenBufferInfo( handle, byref(csbi)) return csbi def SetConsoleTextAttribute(stream_id, attrs): handle = _GetStdHandle(stream_id) return _SetConsoleTextAttribute(handle, attrs) def SetConsoleCursorPosition(stream_id, position, adjust=True): position = COORD(*position) # If the position is out of range, do nothing. if position.Y <= 0 or position.X <= 0: return # Adjust for Windows' SetConsoleCursorPosition: # 1. being 0-based, while ANSI is 1-based. # 2. expecting (x,y), while ANSI uses (y,x). adjusted_position = COORD(position.Y - 1, position.X - 1) if adjust: # Adjust for viewport's scroll position sr = GetConsoleScreenBufferInfo(STDOUT).srWindow adjusted_position.Y += sr.Top adjusted_position.X += sr.Left # Resume normal processing handle = _GetStdHandle(stream_id) return _SetConsoleCursorPosition(handle, adjusted_position) def FillConsoleOutputCharacter(stream_id, char, length, start): handle = _GetStdHandle(stream_id) char = c_char(char.encode()) length = wintypes.DWORD(length) num_written = wintypes.DWORD(0) # Note that this is hard-coded for ANSI (vs wide) bytes. success = _FillConsoleOutputCharacterA( handle, char, length, start, byref(num_written)) return num_written.value def FillConsoleOutputAttribute(stream_id, attr, length, start): ''' FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten )''' handle = _GetStdHandle(stream_id) attribute = wintypes.WORD(attr) length = wintypes.DWORD(length) num_written = wintypes.DWORD(0) # Note that this is hard-coded for ANSI (vs wide) bytes. return _FillConsoleOutputAttribute( handle, attribute, length, start, byref(num_written)) def SetConsoleTitle(title): return _SetConsoleTitleW(title)