268 lines
6.2 KiB
Python
268 lines
6.2 KiB
Python
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"""
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Interface for an output.
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"""
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from abc import ABCMeta, abstractmethod
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from prompt_toolkit.data_structures import Size
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from prompt_toolkit.styles import Attrs
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from .color_depth import ColorDepth
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__all__ = [
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"Output",
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"DummyOutput",
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]
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class Output(metaclass=ABCMeta):
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"""
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Base class defining the output interface for a
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:class:`~prompt_toolkit.renderer.Renderer`.
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Actual implementations are
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:class:`~prompt_toolkit.output.vt100.Vt100_Output` and
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:class:`~prompt_toolkit.output.win32.Win32Output`.
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"""
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@abstractmethod
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def fileno(self) -> int:
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" Return the file descriptor to which we can write for the output. "
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@abstractmethod
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def encoding(self) -> str:
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"""
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Return the encoding for this output, e.g. 'utf-8'.
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(This is used mainly to know which characters are supported by the
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output the data, so that the UI can provide alternatives, when
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required.)
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"""
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@abstractmethod
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def write(self, data: str) -> None:
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" Write text (Terminal escape sequences will be removed/escaped.) "
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@abstractmethod
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def write_raw(self, data: str) -> None:
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" Write text. "
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@abstractmethod
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def set_title(self, title: str) -> None:
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" Set terminal title. "
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@abstractmethod
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def clear_title(self) -> None:
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" Clear title again. (or restore previous title.) "
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@abstractmethod
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def flush(self) -> None:
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" Write to output stream and flush. "
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@abstractmethod
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def erase_screen(self) -> None:
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"""
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Erases the screen with the background colour and moves the cursor to
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home.
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"""
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@abstractmethod
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def enter_alternate_screen(self) -> None:
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" Go to the alternate screen buffer. (For full screen applications). "
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@abstractmethod
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def quit_alternate_screen(self) -> None:
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" Leave the alternate screen buffer. "
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@abstractmethod
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def enable_mouse_support(self) -> None:
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" Enable mouse. "
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@abstractmethod
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def disable_mouse_support(self) -> None:
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" Disable mouse. "
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@abstractmethod
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def erase_end_of_line(self) -> None:
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"""
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Erases from the current cursor position to the end of the current line.
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"""
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@abstractmethod
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def erase_down(self) -> None:
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"""
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Erases the screen from the current line down to the bottom of the
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screen.
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"""
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@abstractmethod
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def reset_attributes(self) -> None:
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" Reset color and styling attributes. "
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@abstractmethod
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def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
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" Set new color and styling attributes. "
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@abstractmethod
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def disable_autowrap(self) -> None:
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" Disable auto line wrapping. "
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@abstractmethod
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def enable_autowrap(self) -> None:
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" Enable auto line wrapping. "
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@abstractmethod
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def cursor_goto(self, row: int = 0, column: int = 0) -> None:
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" Move cursor position. "
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@abstractmethod
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def cursor_up(self, amount: int) -> None:
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" Move cursor `amount` place up. "
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@abstractmethod
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def cursor_down(self, amount: int) -> None:
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" Move cursor `amount` place down. "
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@abstractmethod
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def cursor_forward(self, amount: int) -> None:
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" Move cursor `amount` place forward. "
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@abstractmethod
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def cursor_backward(self, amount: int) -> None:
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" Move cursor `amount` place backward. "
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@abstractmethod
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def hide_cursor(self) -> None:
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" Hide cursor. "
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@abstractmethod
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def show_cursor(self) -> None:
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" Show cursor. "
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def ask_for_cpr(self) -> None:
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"""
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Asks for a cursor position report (CPR).
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(VT100 only.)
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"""
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@abstractmethod
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def get_size(self) -> Size:
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" Return the size of the output window. "
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def bell(self) -> None:
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" Sound bell. "
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def enable_bracketed_paste(self) -> None:
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" For vt100 only. "
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def disable_bracketed_paste(self) -> None:
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" For vt100 only. "
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def scroll_buffer_to_prompt(self) -> None:
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" For Win32 only. "
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def get_rows_below_cursor_position(self) -> int:
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" For Windows only. "
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raise NotImplementedError
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class DummyOutput(Output):
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"""
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For testing. An output class that doesn't render anything.
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"""
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def fileno(self) -> int:
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" There is no sensible default for fileno(). "
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raise NotImplementedError
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def encoding(self) -> str:
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return "utf-8"
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def write(self, data: str) -> None:
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pass
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def write_raw(self, data: str) -> None:
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pass
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def set_title(self, title: str) -> None:
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pass
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def clear_title(self) -> None:
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pass
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def flush(self) -> None:
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pass
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def erase_screen(self) -> None:
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pass
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def enter_alternate_screen(self) -> None:
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pass
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def quit_alternate_screen(self) -> None:
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pass
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def enable_mouse_support(self) -> None:
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pass
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def disable_mouse_support(self) -> None:
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pass
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def erase_end_of_line(self) -> None:
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pass
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def erase_down(self) -> None:
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pass
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def reset_attributes(self) -> None:
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pass
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def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
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pass
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def disable_autowrap(self) -> None:
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pass
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def enable_autowrap(self) -> None:
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pass
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def cursor_goto(self, row: int = 0, column: int = 0) -> None:
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pass
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def cursor_up(self, amount: int) -> None:
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pass
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def cursor_down(self, amount: int) -> None:
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pass
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def cursor_forward(self, amount: int) -> None:
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pass
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def cursor_backward(self, amount: int) -> None:
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pass
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def hide_cursor(self) -> None:
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pass
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def show_cursor(self) -> None:
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pass
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def ask_for_cpr(self) -> None:
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pass
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def bell(self) -> None:
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pass
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def enable_bracketed_paste(self) -> None:
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pass
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def disable_bracketed_paste(self) -> None:
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pass
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def scroll_buffer_to_prompt(self) -> None:
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pass
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def get_size(self) -> Size:
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return Size(rows=40, columns=80)
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def get_rows_below_cursor_position(self) -> int:
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return 40
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