def __init__(self):
self.backbuffer_info = CONSOLE_SCREEN_BUFFER_INFO()
self.cursor_info = CURSOR_INFO()
self.cols = 0
self.rows = 0
self.console_handle = INVALID_HANDLE_VALUE
self.backbuffer_handle = INVALID_HANDLE_VALUE
self.rect = None
self.char_buffer = None
self.coord = COORD(0, 0)
self.size = COORD(0, 0)
def __init__(self):
"""Creates a new instance of the terminal.
"""
self._cursor_info = CURSOR_INFO()
self._console = INVALID_HANDLE_VALUE
self._framebuffer = INVALID_HANDLE_VALUE
self._char_buffer = None
self._cols = 0
self._rows = 0
self._rect = None
self._coord = COORD(0, 0)
self._size = COORD(0, 0)
def setup_console(self):
"""Initializes the screen frame buffer.
Swaps the current screen buffer with a
brand new created back buffer where the
characters can be written to the flicker-free
rectangular region.
"""
self._console = get_std_handle(STD_OUTPUT_HANDLE)
# could not get the standard
# console handle, raise an exception
if self._console == INVALID_HANDLE_VALUE:
raise TermInitializationError()
buffer_info = CONSOLE_SCREEN_BUFFER_INFO()
get_console_screen_buffer_info(self._console, byref(buffer_info))
get_console_cursor_info(self._console, byref(self._cursor_info))
self._cursor_info.visible = False
self._cols = buffer_info.size.x
self._rows = buffer_info.size.y
self._size = COORD(self._cols, self._rows)
self._rect = SMALL_RECT(0, 0, self._cols - 1, self._rows - 1)
self._char_buffer = (CHAR_INFO * (self._size.x * self._size.y))()
self._framebuffer = create_console_screen_buffer(
GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
None, CONSOLE_TEXTMODE_BUFFER, None)
if self._framebuffer == INVALID_HANDLE_VALUE:
raise TermInitializationError()
# hide the cursor and swap
# the console active screen buffer
set_console_cursor_info(self._framebuffer, byref(self._cursor_info))
set_console_active_screen_buffer(self._framebuffer)
def init_console(self):
self.console_handle = get_std_handle(STD_OUTPUT_HANDLE)
if self.console_handle == INVALID_HANDLE_VALUE:
raise TermInitializationError()
get_console_screen_buffer_info(self.console_handle,
byref(self.backbuffer_info))
get_console_cursor_info(self.console_handle, byref(self.cursor_info))
self._show_cursor(False)
self.cols = self.backbuffer_info.size.x
self.rows = self.backbuffer_info.size.y
self.size = COORD(self.cols, self.rows)
self.rect = SMALL_RECT(0, 0, self.cols - 1, self.rows - 1)
self.char_buffer = (CHAR_INFO * (self.size.x * self.size.y))()
self.backbuffer_handle = create_console_screen_buffer(
GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
None, CONSOLE_TEXTMODE_BUFFER, None)
if self.backbuffer_handle == INVALID_HANDLE_VALUE:
raise TermInitializationError()
set_console_active_screen_buffer(self.backbuffer_handle)