Adding upstream version 3.0.36.upstream/3.0.36upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 2341 insertions, 0 deletions

diff --git a/src/prompt_toolkit/output/__init__.py b/src/prompt_toolkit/output/__init__.py
new file mode 100644
index 0000000..7b90b47
--- /dev/null
+++ b/src/prompt_toolkit/output/__init__.py
@@ -0,0 +1,13 @@
+from .base import DummyOutput, Output
+from .color_depth import ColorDepth
+from .defaults import create_output
+
+__all__ = [
+    # Base.
+    "Output",
+    "DummyOutput",
+    # Color depth.
+    "ColorDepth",
+    # Defaults.
+    "create_output",
+]
diff --git a/src/prompt_toolkit/output/base.py b/src/prompt_toolkit/output/base.py
new file mode 100644
index 0000000..c78677b
--- /dev/null
+++ b/src/prompt_toolkit/output/base.py
@@ -0,0 +1,329 @@
+"""
+Interface for an output.
+"""
+from abc import ABCMeta, abstractmethod
+from typing import Optional, TextIO
+
+from prompt_toolkit.cursor_shapes import CursorShape
+from prompt_toolkit.data_structures import Size
+from prompt_toolkit.styles import Attrs
+
+from .color_depth import ColorDepth
+
+__all__ = [
+    "Output",
+    "DummyOutput",
+]
+
+
+class Output(metaclass=ABCMeta):
+    """
+    Base class defining the output interface for a
+    :class:`~prompt_toolkit.renderer.Renderer`.
+
+    Actual implementations are
+    :class:`~prompt_toolkit.output.vt100.Vt100_Output` and
+    :class:`~prompt_toolkit.output.win32.Win32Output`.
+    """
+
+    stdout: Optional[TextIO] = None
+
+    @abstractmethod
+    def fileno(self) -> int:
+        "Return the file descriptor to which we can write for the output."
+
+    @abstractmethod
+    def encoding(self) -> str:
+        """
+        Return the encoding for this output, e.g. 'utf-8'.
+        (This is used mainly to know which characters are supported by the
+        output the data, so that the UI can provide alternatives, when
+        required.)
+        """
+
+    @abstractmethod
+    def write(self, data: str) -> None:
+        "Write text (Terminal escape sequences will be removed/escaped.)"
+
+    @abstractmethod
+    def write_raw(self, data: str) -> None:
+        "Write text."
+
+    @abstractmethod
+    def set_title(self, title: str) -> None:
+        "Set terminal title."
+
+    @abstractmethod
+    def clear_title(self) -> None:
+        "Clear title again. (or restore previous title.)"
+
+    @abstractmethod
+    def flush(self) -> None:
+        "Write to output stream and flush."
+
+    @abstractmethod
+    def erase_screen(self) -> None:
+        """
+        Erases the screen with the background colour and moves the cursor to
+        home.
+        """
+
+    @abstractmethod
+    def enter_alternate_screen(self) -> None:
+        "Go to the alternate screen buffer. (For full screen applications)."
+
+    @abstractmethod
+    def quit_alternate_screen(self) -> None:
+        "Leave the alternate screen buffer."
+
+    @abstractmethod
+    def enable_mouse_support(self) -> None:
+        "Enable mouse."
+
+    @abstractmethod
+    def disable_mouse_support(self) -> None:
+        "Disable mouse."
+
+    @abstractmethod
+    def erase_end_of_line(self) -> None:
+        """
+        Erases from the current cursor position to the end of the current line.
+        """
+
+    @abstractmethod
+    def erase_down(self) -> None:
+        """
+        Erases the screen from the current line down to the bottom of the
+        screen.
+        """
+
+    @abstractmethod
+    def reset_attributes(self) -> None:
+        "Reset color and styling attributes."
+
+    @abstractmethod
+    def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
+        "Set new color and styling attributes."
+
+    @abstractmethod
+    def disable_autowrap(self) -> None:
+        "Disable auto line wrapping."
+
+    @abstractmethod
+    def enable_autowrap(self) -> None:
+        "Enable auto line wrapping."
+
+    @abstractmethod
+    def cursor_goto(self, row: int = 0, column: int = 0) -> None:
+        "Move cursor position."
+
+    @abstractmethod
+    def cursor_up(self, amount: int) -> None:
+        "Move cursor `amount` place up."
+
+    @abstractmethod
+    def cursor_down(self, amount: int) -> None:
+        "Move cursor `amount` place down."
+
+    @abstractmethod
+    def cursor_forward(self, amount: int) -> None:
+        "Move cursor `amount` place forward."
+
+    @abstractmethod
+    def cursor_backward(self, amount: int) -> None:
+        "Move cursor `amount` place backward."
+
+    @abstractmethod
+    def hide_cursor(self) -> None:
+        "Hide cursor."
+
+    @abstractmethod
+    def show_cursor(self) -> None:
+        "Show cursor."
+
+    @abstractmethod
+    def set_cursor_shape(self, cursor_shape: CursorShape) -> None:
+        "Set cursor shape to block, beam or underline."
+
+    @abstractmethod
+    def reset_cursor_shape(self) -> None:
+        "Reset cursor shape."
+
+    def ask_for_cpr(self) -> None:
+        """
+        Asks for a cursor position report (CPR).
+        (VT100 only.)
+        """
+
+    @property
+    def responds_to_cpr(self) -> bool:
+        """
+        `True` if the `Application` can expect to receive a CPR response after
+        calling `ask_for_cpr` (this will come back through the corresponding
+        `Input`).
+
+        This is used to determine the amount of available rows we have below
+        the cursor position. In the first place, we have this so that the drop
+        down autocompletion menus are sized according to the available space.
+
+        On Windows, we don't need this, there we have
+        `get_rows_below_cursor_position`.
+        """
+        return False
+
+    @abstractmethod
+    def get_size(self) -> Size:
+        "Return the size of the output window."
+
+    def bell(self) -> None:
+        "Sound bell."
+
+    def enable_bracketed_paste(self) -> None:
+        "For vt100 only."
+
+    def disable_bracketed_paste(self) -> None:
+        "For vt100 only."
+
+    def reset_cursor_key_mode(self) -> None:
+        """
+        For vt100 only.
+        Put the terminal in normal cursor mode (instead of application mode).
+
+        See: https://vt100.net/docs/vt100-ug/chapter3.html
+        """
+
+    def scroll_buffer_to_prompt(self) -> None:
+        "For Win32 only."
+
+    def get_rows_below_cursor_position(self) -> int:
+        "For Windows only."
+        raise NotImplementedError
+
+    @abstractmethod
+    def get_default_color_depth(self) -> ColorDepth:
+        """
+        Get default color depth for this output.
+
+        This value will be used if no color depth was explicitely passed to the
+        `Application`.
+
+        .. note::
+
+            If the `$PROMPT_TOOLKIT_COLOR_DEPTH` environment variable has been
+            set, then `outputs.defaults.create_output` will pass this value to
+            the implementation as the default_color_depth, which is returned
+            here. (This is not used when the output corresponds to a
+            prompt_toolkit SSH/Telnet session.)
+        """
+
+
+class DummyOutput(Output):
+    """
+    For testing. An output class that doesn't render anything.
+    """
+
+    def fileno(self) -> int:
+        "There is no sensible default for fileno()."
+        raise NotImplementedError
+
+    def encoding(self) -> str:
+        return "utf-8"
+
+    def write(self, data: str) -> None:
+        pass
+
+    def write_raw(self, data: str) -> None:
+        pass
+
+    def set_title(self, title: str) -> None:
+        pass
+
+    def clear_title(self) -> None:
+        pass
+
+    def flush(self) -> None:
+        pass
+
+    def erase_screen(self) -> None:
+        pass
+
+    def enter_alternate_screen(self) -> None:
+        pass
+
+    def quit_alternate_screen(self) -> None:
+        pass
+
+    def enable_mouse_support(self) -> None:
+        pass
+
+    def disable_mouse_support(self) -> None:
+        pass
+
+    def erase_end_of_line(self) -> None:
+        pass
+
+    def erase_down(self) -> None:
+        pass
+
+    def reset_attributes(self) -> None:
+        pass
+
+    def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
+        pass
+
+    def disable_autowrap(self) -> None:
+        pass
+
+    def enable_autowrap(self) -> None:
+        pass
+
+    def cursor_goto(self, row: int = 0, column: int = 0) -> None:
+        pass
+
+    def cursor_up(self, amount: int) -> None:
+        pass
+
+    def cursor_down(self, amount: int) -> None:
+        pass
+
+    def cursor_forward(self, amount: int) -> None:
+        pass
+
+    def cursor_backward(self, amount: int) -> None:
+        pass
+
+    def hide_cursor(self) -> None:
+        pass
+
+    def show_cursor(self) -> None:
+        pass
+
+    def set_cursor_shape(self, cursor_shape: CursorShape) -> None:
+        pass
+
+    def reset_cursor_shape(self) -> None:
+        pass
+
+    def ask_for_cpr(self) -> None:
+        pass
+
+    def bell(self) -> None:
+        pass
+
+    def enable_bracketed_paste(self) -> None:
+        pass
+
+    def disable_bracketed_paste(self) -> None:
+        pass
+
+    def scroll_buffer_to_prompt(self) -> None:
+        pass
+
+    def get_size(self) -> Size:
+        return Size(rows=40, columns=80)
+
+    def get_rows_below_cursor_position(self) -> int:
+        return 40
+
+    def get_default_color_depth(self) -> ColorDepth:
+        return ColorDepth.DEPTH_1_BIT
diff --git a/src/prompt_toolkit/output/color_depth.py b/src/prompt_toolkit/output/color_depth.py
new file mode 100644
index 0000000..a6166ba
--- /dev/null
+++ b/src/prompt_toolkit/output/color_depth.py
@@ -0,0 +1,58 @@
+import os
+from enum import Enum
+from typing import Optional
+
+__all__ = [
+    "ColorDepth",
+]
+
+
+class ColorDepth(str, Enum):
+    """
+    Possible color depth values for the output.
+    """
+
+    value: str
+
+    #: One color only.
+    DEPTH_1_BIT = "DEPTH_1_BIT"
+
+    #: ANSI Colors.
+    DEPTH_4_BIT = "DEPTH_4_BIT"
+
+    #: The default.
+    DEPTH_8_BIT = "DEPTH_8_BIT"
+
+    #: 24 bit True color.
+    DEPTH_24_BIT = "DEPTH_24_BIT"
+
+    # Aliases.
+    MONOCHROME = DEPTH_1_BIT
+    ANSI_COLORS_ONLY = DEPTH_4_BIT
+    DEFAULT = DEPTH_8_BIT
+    TRUE_COLOR = DEPTH_24_BIT
+
+    @classmethod
+    def from_env(cls) -> Optional["ColorDepth"]:
+        """
+        Return the color depth if the $PROMPT_TOOLKIT_COLOR_DEPTH environment
+        variable has been set.
+
+        This is a way to enforce a certain color depth in all prompt_toolkit
+        applications.
+        """
+        # Check the `PROMPT_TOOLKIT_COLOR_DEPTH` environment variable.
+        all_values = [i.value for i in ColorDepth]
+        if os.environ.get("PROMPT_TOOLKIT_COLOR_DEPTH") in all_values:
+            return cls(os.environ["PROMPT_TOOLKIT_COLOR_DEPTH"])
+
+        return None
+
+    @classmethod
+    def default(cls) -> "ColorDepth":
+        """
+        Return the default color depth for the default output.
+        """
+        from .defaults import create_output
+
+        return create_output().get_default_color_depth()
diff --git a/src/prompt_toolkit/output/conemu.py b/src/prompt_toolkit/output/conemu.py
new file mode 100644
index 0000000..fc46cc4
--- /dev/null
+++ b/src/prompt_toolkit/output/conemu.py
@@ -0,0 +1,63 @@
+import sys
+
+assert sys.platform == "win32"
+
+from typing import Any, Optional, TextIO
+
+from prompt_toolkit.data_structures import Size
+
+from .base import Output
+from .color_depth import ColorDepth
+from .vt100 import Vt100_Output
+from .win32 import Win32Output
+
+__all__ = [
+    "ConEmuOutput",
+]
+
+
+class ConEmuOutput:
+    """
+    ConEmu (Windows) output abstraction.
+
+    ConEmu is a Windows console application, but it also supports ANSI escape
+    sequences. This output class is actually a proxy to both `Win32Output` and
+    `Vt100_Output`. It uses `Win32Output` for console sizing and scrolling, but
+    all cursor movements and scrolling happens through the `Vt100_Output`.
+
+    This way, we can have 256 colors in ConEmu and Cmder. Rendering will be
+    even a little faster as well.
+
+    http://conemu.github.io/
+    http://gooseberrycreative.com/cmder/
+    """
+
+    def __init__(
+        self, stdout: TextIO, default_color_depth: Optional[ColorDepth] = None
+    ) -> None:
+        self.win32_output = Win32Output(stdout, default_color_depth=default_color_depth)
+        self.vt100_output = Vt100_Output(
+            stdout, lambda: Size(0, 0), default_color_depth=default_color_depth
+        )
+
+    @property
+    def responds_to_cpr(self) -> bool:
+        return False  # We don't need this on Windows.
+
+    def __getattr__(self, name: str) -> Any:
+        if name in (
+            "get_size",
+            "get_rows_below_cursor_position",
+            "enable_mouse_support",
+            "disable_mouse_support",
+            "scroll_buffer_to_prompt",
+            "get_win32_screen_buffer_info",
+            "enable_bracketed_paste",
+            "disable_bracketed_paste",
+        ):
+            return getattr(self.win32_output, name)
+        else:
+            return getattr(self.vt100_output, name)
+
+
+Output.register(ConEmuOutput)
diff --git a/src/prompt_toolkit/output/defaults.py b/src/prompt_toolkit/output/defaults.py
new file mode 100644
index 0000000..7fb0f89
--- /dev/null
+++ b/src/prompt_toolkit/output/defaults.py
@@ -0,0 +1,100 @@
+import sys
+from typing import Optional, TextIO, cast
+
+from prompt_toolkit.utils import (
+    get_bell_environment_variable,
+    get_term_environment_variable,
+    is_conemu_ansi,
+)
+
+from .base import DummyOutput, Output
+from .color_depth import ColorDepth
+from .plain_text import PlainTextOutput
+
+__all__ = [
+    "create_output",
+]
+
+
+def create_output(
+    stdout: Optional[TextIO] = None, always_prefer_tty: bool = False
+) -> Output:
+    """
+    Return an :class:`~prompt_toolkit.output.Output` instance for the command
+    line.
+
+    :param stdout: The stdout object
+    :param always_prefer_tty: When set, look for `sys.stderr` if `sys.stdout`
+        is not a TTY. Useful if `sys.stdout` is redirected to a file, but we
+        still want user input and output on the terminal.
+
+        By default, this is `False`. If `sys.stdout` is not a terminal (maybe
+        it's redirected to a file), then a `PlainTextOutput` will be returned.
+        That way, tools like `print_formatted_text` will write plain text into
+        that file.
+    """
+    # Consider TERM, PROMPT_TOOLKIT_BELL, and PROMPT_TOOLKIT_COLOR_DEPTH
+    # environment variables. Notice that PROMPT_TOOLKIT_COLOR_DEPTH value is
+    # the default that's used if the Application doesn't override it.
+    term_from_env = get_term_environment_variable()
+    bell_from_env = get_bell_environment_variable()
+    color_depth_from_env = ColorDepth.from_env()
+
+    if stdout is None:
+        # By default, render to stdout. If the output is piped somewhere else,
+        # render to stderr.
+        stdout = sys.stdout
+
+        if always_prefer_tty:
+            for io in [sys.stdout, sys.stderr]:
+                if io is not None and io.isatty():
+                    # (This is `None` when using `pythonw.exe` on Windows.)
+                    stdout = io
+                    break
+
+    # If the output is still `None`, use a DummyOutput.
+    # This happens for instance on Windows, when running the application under
+    # `pythonw.exe`. In that case, there won't be a terminal Window, and
+    # stdin/stdout/stderr are `None`.
+    if stdout is None:
+        return DummyOutput()
+
+    # If the patch_stdout context manager has been used, then sys.stdout is
+    # replaced by this proxy. For prompt_toolkit applications, we want to use
+    # the real stdout.
+    from prompt_toolkit.patch_stdout import StdoutProxy
+
+    while isinstance(stdout, StdoutProxy):
+        stdout = stdout.original_stdout
+
+    if sys.platform == "win32":
+        from .conemu import ConEmuOutput
+        from .win32 import Win32Output
+        from .windows10 import Windows10_Output, is_win_vt100_enabled
+
+        if is_win_vt100_enabled():
+            return cast(
+                Output,
+                Windows10_Output(stdout, default_color_depth=color_depth_from_env),
+            )
+        if is_conemu_ansi():
+            return cast(
+                Output, ConEmuOutput(stdout, default_color_depth=color_depth_from_env)
+            )
+        else:
+            return Win32Output(stdout, default_color_depth=color_depth_from_env)
+    else:
+        from .vt100 import Vt100_Output
+
+        # Stdout is not a TTY? Render as plain text.
+        # This is mostly useful if stdout is redirected to a file, and
+        # `print_formatted_text` is used.
+        if not stdout.isatty():
+            return PlainTextOutput(stdout)
+
+        return Vt100_Output.from_pty(
+            stdout,
+            term=term_from_env,
+            default_color_depth=color_depth_from_env,
+            enable_bell=bell_from_env,
+        )
diff --git a/src/prompt_toolkit/output/flush_stdout.py b/src/prompt_toolkit/output/flush_stdout.py
new file mode 100644
index 0000000..e98d253
--- /dev/null
+++ b/src/prompt_toolkit/output/flush_stdout.py
@@ -0,0 +1,85 @@
+import errno
+import os
+import sys
+from contextlib import contextmanager
+from typing import IO, Iterator, TextIO, cast
+
+__all__ = ["flush_stdout"]
+
+
+def flush_stdout(stdout: TextIO, data: str) -> None:
+    # If the IO object has an `encoding` and `buffer` attribute, it means that
+    # we can access the underlying BinaryIO object and write into it in binary
+    # mode. This is preferred if possible.
+    # NOTE: When used in a Jupyter notebook, don't write binary.
+    #       `ipykernel.iostream.OutStream` has an `encoding` attribute, but not
+    #       a `buffer` attribute, so we can't write binary in it.
+    has_binary_io = hasattr(stdout, "encoding") and hasattr(stdout, "buffer")
+
+    try:
+        # Ensure that `stdout` is made blocking when writing into it.
+        # Otherwise, when uvloop is activated (which makes stdout
+        # non-blocking), and we write big amounts of text, then we get a
+        # `BlockingIOError` here.
+        with _blocking_io(stdout):
+            # (We try to encode ourself, because that way we can replace
+            # characters that don't exist in the character set, avoiding
+            # UnicodeEncodeError crashes. E.g. u'\xb7' does not appear in 'ascii'.)
+            # My Arch Linux installation of july 2015 reported 'ANSI_X3.4-1968'
+            # for sys.stdout.encoding in xterm.
+            if has_binary_io:
+                stdout.buffer.write(data.encode(stdout.encoding or "utf-8", "replace"))
+            else:
+                stdout.write(data)
+
+            stdout.flush()
+    except OSError as e:
+        if e.args and e.args[0] == errno.EINTR:
+            # Interrupted system call. Can happen in case of a window
+            # resize signal. (Just ignore. The resize handler will render
+            # again anyway.)
+            pass
+        elif e.args and e.args[0] == 0:
+            # This can happen when there is a lot of output and the user
+            # sends a KeyboardInterrupt by pressing Control-C. E.g. in
+            # a Python REPL when we execute "while True: print('test')".
+            # (The `ptpython` REPL uses this `Output` class instead of
+            # `stdout` directly -- in order to be network transparent.)
+            # So, just ignore.
+            pass
+        else:
+            raise
+
+
+@contextmanager
+def _blocking_io(io: IO[str]) -> Iterator[None]:
+    """
+    Ensure that the FD for `io` is set to blocking in here.
+    """
+    if sys.platform == "win32":
+        # On Windows, the `os` module doesn't have a `get/set_blocking`
+        # function.
+        yield
+        return
+
+    try:
+        fd = io.fileno()
+        blocking = os.get_blocking(fd)
+    except:  # noqa
+        # Failed somewhere.
+        # `get_blocking` can raise `OSError`.
+        # The io object can raise `AttributeError` when no `fileno()` method is
+        # present if we're not a real file object.
+        blocking = True  # Assume we're good, and don't do anything.
+
+    try:
+        # Make blocking if we weren't blocking yet.
+        if not blocking:
+            os.set_blocking(fd, True)
+
+        yield
+
+    finally:
+        # Restore original blocking mode.
+        if not blocking:
+            os.set_blocking(fd, blocking)
diff --git a/src/prompt_toolkit/output/plain_text.py b/src/prompt_toolkit/output/plain_text.py
new file mode 100644
index 0000000..4360355
--- /dev/null
+++ b/src/prompt_toolkit/output/plain_text.py
@@ -0,0 +1,141 @@
+from typing import List, TextIO
+
+from prompt_toolkit.cursor_shapes import CursorShape
+from prompt_toolkit.data_structures import Size
+from prompt_toolkit.styles import Attrs
+
+from .base import Output
+from .color_depth import ColorDepth
+from .flush_stdout import flush_stdout
+
+__all__ = ["PlainTextOutput"]
+
+
+class PlainTextOutput(Output):
+    """
+    Output that won't include any ANSI escape sequences.
+
+    Useful when stdout is not a terminal. Maybe stdout is redirected to a file.
+    In this case, if `print_formatted_text` is used, for instance, we don't
+    want to include formatting.
+
+    (The code is mostly identical to `Vt100_Output`, but without the
+    formatting.)
+    """
+
+    def __init__(self, stdout: TextIO) -> None:
+        assert all(hasattr(stdout, a) for a in ("write", "flush"))
+
+        self.stdout: TextIO = stdout
+        self._buffer: List[str] = []
+
+    def fileno(self) -> int:
+        "There is no sensible default for fileno()."
+        return self.stdout.fileno()
+
+    def encoding(self) -> str:
+        return "utf-8"
+
+    def write(self, data: str) -> None:
+        self._buffer.append(data)
+
+    def write_raw(self, data: str) -> None:
+        self._buffer.append(data)
+
+    def set_title(self, title: str) -> None:
+        pass
+
+    def clear_title(self) -> None:
+        pass
+
+    def flush(self) -> None:
+        if not self._buffer:
+            return
+
+        data = "".join(self._buffer)
+        self._buffer = []
+        flush_stdout(self.stdout, data)
+
+    def erase_screen(self) -> None:
+        pass
+
+    def enter_alternate_screen(self) -> None:
+        pass
+
+    def quit_alternate_screen(self) -> None:
+        pass
+
+    def enable_mouse_support(self) -> None:
+        pass
+
+    def disable_mouse_support(self) -> None:
+        pass
+
+    def erase_end_of_line(self) -> None:
+        pass
+
+    def erase_down(self) -> None:
+        pass
+
+    def reset_attributes(self) -> None:
+        pass
+
+    def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
+        pass
+
+    def disable_autowrap(self) -> None:
+        pass
+
+    def enable_autowrap(self) -> None:
+        pass
+
+    def cursor_goto(self, row: int = 0, column: int = 0) -> None:
+        pass
+
+    def cursor_up(self, amount: int) -> None:
+        pass
+
+    def cursor_down(self, amount: int) -> None:
+        self._buffer.append("\n")
+
+    def cursor_forward(self, amount: int) -> None:
+        self._buffer.append(" " * amount)
+
+    def cursor_backward(self, amount: int) -> None:
+        pass
+
+    def hide_cursor(self) -> None:
+        pass
+
+    def show_cursor(self) -> None:
+        pass
+
+    def set_cursor_shape(self, cursor_shape: CursorShape) -> None:
+        pass
+
+    def reset_cursor_shape(self) -> None:
+        pass
+
+    def ask_for_cpr(self) -> None:
+        pass
+
+    def bell(self) -> None:
+        pass
+
+    def enable_bracketed_paste(self) -> None:
+        pass
+
+    def disable_bracketed_paste(self) -> None:
+        pass
+
+    def scroll_buffer_to_prompt(self) -> None:
+        pass
+
+    def get_size(self) -> Size:
+        return Size(rows=40, columns=80)
+
+    def get_rows_below_cursor_position(self) -> int:
+        return 8
+
+    def get_default_color_depth(self) -> ColorDepth:
+        return ColorDepth.DEPTH_1_BIT
diff --git a/src/prompt_toolkit/output/vt100.py b/src/prompt_toolkit/output/vt100.py
new file mode 100644
index 0000000..6fbf068
--- /dev/null
+++ b/src/prompt_toolkit/output/vt100.py
@@ -0,0 +1,758 @@
+"""
+Output for vt100 terminals.
+
+A lot of thanks, regarding outputting of colors, goes to the Pygments project:
+(We don't rely on Pygments anymore, because many things are very custom, and
+everything has been highly optimized.)
+http://pygments.org/
+"""
+import io
+import os
+import sys
+from typing import (
+    Callable,
+    Dict,
+    Hashable,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Set,
+    TextIO,
+    Tuple,
+)
+
+from prompt_toolkit.cursor_shapes import CursorShape
+from prompt_toolkit.data_structures import Size
+from prompt_toolkit.output import Output
+from prompt_toolkit.styles import ANSI_COLOR_NAMES, Attrs
+from prompt_toolkit.utils import is_dumb_terminal
+
+from .color_depth import ColorDepth
+from .flush_stdout import flush_stdout
+
+__all__ = [
+    "Vt100_Output",
+]
+
+
+FG_ANSI_COLORS = {
+    "ansidefault": 39,
+    # Low intensity.
+    "ansiblack": 30,
+    "ansired": 31,
+    "ansigreen": 32,
+    "ansiyellow": 33,
+    "ansiblue": 34,
+    "ansimagenta": 35,
+    "ansicyan": 36,
+    "ansigray": 37,
+    # High intensity.
+    "ansibrightblack": 90,
+    "ansibrightred": 91,
+    "ansibrightgreen": 92,
+    "ansibrightyellow": 93,
+    "ansibrightblue": 94,
+    "ansibrightmagenta": 95,
+    "ansibrightcyan": 96,
+    "ansiwhite": 97,
+}
+
+BG_ANSI_COLORS = {
+    "ansidefault": 49,
+    # Low intensity.
+    "ansiblack": 40,
+    "ansired": 41,
+    "ansigreen": 42,
+    "ansiyellow": 43,
+    "ansiblue": 44,
+    "ansimagenta": 45,
+    "ansicyan": 46,
+    "ansigray": 47,
+    # High intensity.
+    "ansibrightblack": 100,
+    "ansibrightred": 101,
+    "ansibrightgreen": 102,
+    "ansibrightyellow": 103,
+    "ansibrightblue": 104,
+    "ansibrightmagenta": 105,
+    "ansibrightcyan": 106,
+    "ansiwhite": 107,
+}
+
+
+ANSI_COLORS_TO_RGB = {
+    "ansidefault": (
+        0x00,
+        0x00,
+        0x00,
+    ),  # Don't use, 'default' doesn't really have a value.
+    "ansiblack": (0x00, 0x00, 0x00),
+    "ansigray": (0xE5, 0xE5, 0xE5),
+    "ansibrightblack": (0x7F, 0x7F, 0x7F),
+    "ansiwhite": (0xFF, 0xFF, 0xFF),
+    # Low intensity.
+    "ansired": (0xCD, 0x00, 0x00),
+    "ansigreen": (0x00, 0xCD, 0x00),
+    "ansiyellow": (0xCD, 0xCD, 0x00),
+    "ansiblue": (0x00, 0x00, 0xCD),
+    "ansimagenta": (0xCD, 0x00, 0xCD),
+    "ansicyan": (0x00, 0xCD, 0xCD),
+    # High intensity.
+    "ansibrightred": (0xFF, 0x00, 0x00),
+    "ansibrightgreen": (0x00, 0xFF, 0x00),
+    "ansibrightyellow": (0xFF, 0xFF, 0x00),
+    "ansibrightblue": (0x00, 0x00, 0xFF),
+    "ansibrightmagenta": (0xFF, 0x00, 0xFF),
+    "ansibrightcyan": (0x00, 0xFF, 0xFF),
+}
+
+
+assert set(FG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
+assert set(BG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
+assert set(ANSI_COLORS_TO_RGB) == set(ANSI_COLOR_NAMES)
+
+
+def _get_closest_ansi_color(r: int, g: int, b: int, exclude: Sequence[str] = ()) -> str:
+    """
+    Find closest ANSI color. Return it by name.
+
+    :param r: Red (Between 0 and 255.)
+    :param g: Green (Between 0 and 255.)
+    :param b: Blue (Between 0 and 255.)
+    :param exclude: A tuple of color names to exclude. (E.g. ``('ansired', )``.)
+    """
+    exclude = list(exclude)
+
+    # When we have a bit of saturation, avoid the gray-like colors, otherwise,
+    # too often the distance to the gray color is less.
+    saturation = abs(r - g) + abs(g - b) + abs(b - r)  # Between 0..510
+
+    if saturation > 30:
+        exclude.extend(["ansilightgray", "ansidarkgray", "ansiwhite", "ansiblack"])
+
+    # Take the closest color.
+    # (Thanks to Pygments for this part.)
+    distance = 257 * 257 * 3  # "infinity" (>distance from #000000 to #ffffff)
+    match = "ansidefault"
+
+    for name, (r2, g2, b2) in ANSI_COLORS_TO_RGB.items():
+        if name != "ansidefault" and name not in exclude:
+            d = (r - r2) ** 2 + (g - g2) ** 2 + (b - b2) ** 2
+
+            if d < distance:
+                match = name
+                distance = d
+
+    return match
+
+
+_ColorCodeAndName = Tuple[int, str]
+
+
+class _16ColorCache:
+    """
+    Cache which maps (r, g, b) tuples to 16 ansi colors.
+
+    :param bg: Cache for background colors, instead of foreground.
+    """
+
+    def __init__(self, bg: bool = False) -> None:
+        self.bg = bg
+        self._cache: Dict[Hashable, _ColorCodeAndName] = {}
+
+    def get_code(
+        self, value: Tuple[int, int, int], exclude: Sequence[str] = ()
+    ) -> _ColorCodeAndName:
+        """
+        Return a (ansi_code, ansi_name) tuple. (E.g. ``(44, 'ansiblue')``.) for
+        a given (r,g,b) value.
+        """
+        key: Hashable = (value, tuple(exclude))
+        cache = self._cache
+
+        if key not in cache:
+            cache[key] = self._get(value, exclude)
+
+        return cache[key]
+
+    def _get(
+        self, value: Tuple[int, int, int], exclude: Sequence[str] = ()
+    ) -> _ColorCodeAndName:
+
+        r, g, b = value
+        match = _get_closest_ansi_color(r, g, b, exclude=exclude)
+
+        # Turn color name into code.
+        if self.bg:
+            code = BG_ANSI_COLORS[match]
+        else:
+            code = FG_ANSI_COLORS[match]
+
+        return code, match
+
+
+class _256ColorCache(Dict[Tuple[int, int, int], int]):
+    """
+    Cache which maps (r, g, b) tuples to 256 colors.
+    """
+
+    def __init__(self) -> None:
+        # Build color table.
+        colors: List[Tuple[int, int, int]] = []
+
+        # colors 0..15: 16 basic colors
+        colors.append((0x00, 0x00, 0x00))  # 0
+        colors.append((0xCD, 0x00, 0x00))  # 1
+        colors.append((0x00, 0xCD, 0x00))  # 2
+        colors.append((0xCD, 0xCD, 0x00))  # 3
+        colors.append((0x00, 0x00, 0xEE))  # 4
+        colors.append((0xCD, 0x00, 0xCD))  # 5
+        colors.append((0x00, 0xCD, 0xCD))  # 6
+        colors.append((0xE5, 0xE5, 0xE5))  # 7
+        colors.append((0x7F, 0x7F, 0x7F))  # 8
+        colors.append((0xFF, 0x00, 0x00))  # 9
+        colors.append((0x00, 0xFF, 0x00))  # 10
+        colors.append((0xFF, 0xFF, 0x00))  # 11
+        colors.append((0x5C, 0x5C, 0xFF))  # 12
+        colors.append((0xFF, 0x00, 0xFF))  # 13
+        colors.append((0x00, 0xFF, 0xFF))  # 14
+        colors.append((0xFF, 0xFF, 0xFF))  # 15
+
+        # colors 16..232: the 6x6x6 color cube
+        valuerange = (0x00, 0x5F, 0x87, 0xAF, 0xD7, 0xFF)
+
+        for i in range(217):
+            r = valuerange[(i // 36) % 6]
+            g = valuerange[(i // 6) % 6]
+            b = valuerange[i % 6]
+            colors.append((r, g, b))
+
+        # colors 233..253: grayscale
+        for i in range(1, 22):
+            v = 8 + i * 10
+            colors.append((v, v, v))
+
+        self.colors = colors
+
+    def __missing__(self, value: Tuple[int, int, int]) -> int:
+        r, g, b = value
+
+        # Find closest color.
+        # (Thanks to Pygments for this!)
+        distance = 257 * 257 * 3  # "infinity" (>distance from #000000 to #ffffff)
+        match = 0
+
+        for i, (r2, g2, b2) in enumerate(self.colors):
+            if i >= 16:  # XXX: We ignore the 16 ANSI colors when mapping RGB
+                # to the 256 colors, because these highly depend on
+                # the color scheme of the terminal.
+                d = (r - r2) ** 2 + (g - g2) ** 2 + (b - b2) ** 2
+
+                if d < distance:
+                    match = i
+                    distance = d
+
+        # Turn color name into code.
+        self[value] = match
+        return match
+
+
+_16_fg_colors = _16ColorCache(bg=False)
+_16_bg_colors = _16ColorCache(bg=True)
+_256_colors = _256ColorCache()
+
+
+class _EscapeCodeCache(Dict[Attrs, str]):
+    """
+    Cache for VT100 escape codes. It maps
+    (fgcolor, bgcolor, bold, underline, strike, reverse) tuples to VT100
+    escape sequences.
+
+    :param true_color: When True, use 24bit colors instead of 256 colors.
+    """
+
+    def __init__(self, color_depth: ColorDepth) -> None:
+        self.color_depth = color_depth
+
+    def __missing__(self, attrs: Attrs) -> str:
+        (
+            fgcolor,
+            bgcolor,
+            bold,
+            underline,
+            strike,
+            italic,
+            blink,
+            reverse,
+            hidden,
+        ) = attrs
+        parts: List[str] = []
+
+        parts.extend(self._colors_to_code(fgcolor or "", bgcolor or ""))
+
+        if bold:
+            parts.append("1")
+        if italic:
+            parts.append("3")
+        if blink:
+            parts.append("5")
+        if underline:
+            parts.append("4")
+        if reverse:
+            parts.append("7")
+        if hidden:
+            parts.append("8")
+        if strike:
+            parts.append("9")
+
+        if parts:
+            result = "\x1b[0;" + ";".join(parts) + "m"
+        else:
+            result = "\x1b[0m"
+
+        self[attrs] = result
+        return result
+
+    def _color_name_to_rgb(self, color: str) -> Tuple[int, int, int]:
+        "Turn 'ffffff', into (0xff, 0xff, 0xff)."
+        try:
+            rgb = int(color, 16)
+        except ValueError:
+            raise
+        else:
+            r = (rgb >> 16) & 0xFF
+            g = (rgb >> 8) & 0xFF
+            b = rgb & 0xFF
+            return r, g, b
+
+    def _colors_to_code(self, fg_color: str, bg_color: str) -> Iterable[str]:
+        """
+        Return a tuple with the vt100 values  that represent this color.
+        """
+        # When requesting ANSI colors only, and both fg/bg color were converted
+        # to ANSI, ensure that the foreground and background color are not the
+        # same. (Unless they were explicitly defined to be the same color.)
+        fg_ansi = ""
+
+        def get(color: str, bg: bool) -> List[int]:
+            nonlocal fg_ansi
+
+            table = BG_ANSI_COLORS if bg else FG_ANSI_COLORS
+
+            if not color or self.color_depth == ColorDepth.DEPTH_1_BIT:
+                return []
+
+            # 16 ANSI colors. (Given by name.)
+            elif color in table:
+                return [table[color]]
+
+            # RGB colors. (Defined as 'ffffff'.)
+            else:
+                try:
+                    rgb = self._color_name_to_rgb(color)
+                except ValueError:
+                    return []
+
+                # When only 16 colors are supported, use that.
+                if self.color_depth == ColorDepth.DEPTH_4_BIT:
+                    if bg:  # Background.
+                        if fg_color != bg_color:
+                            exclude = [fg_ansi]
+                        else:
+                            exclude = []
+                        code, name = _16_bg_colors.get_code(rgb, exclude=exclude)
+                        return [code]
+                    else:  # Foreground.
+                        code, name = _16_fg_colors.get_code(rgb)
+                        fg_ansi = name
+                        return [code]
+
+                # True colors. (Only when this feature is enabled.)
+                elif self.color_depth == ColorDepth.DEPTH_24_BIT:
+                    r, g, b = rgb
+                    return [(48 if bg else 38), 2, r, g, b]
+
+                # 256 RGB colors.
+                else:
+                    return [(48 if bg else 38), 5, _256_colors[rgb]]
+
+        result: List[int] = []
+        result.extend(get(fg_color, False))
+        result.extend(get(bg_color, True))
+
+        return map(str, result)
+
+
+def _get_size(fileno: int) -> Tuple[int, int]:
+    """
+    Get the size of this pseudo terminal.
+
+    :param fileno: stdout.fileno()
+    :returns: A (rows, cols) tuple.
+    """
+    size = os.get_terminal_size(fileno)
+    return size.lines, size.columns
+
+
+class Vt100_Output(Output):
+    """
+    :param get_size: A callable which returns the `Size` of the output terminal.
+    :param stdout: Any object with has a `write` and `flush` method + an 'encoding' property.
+    :param term: The terminal environment variable. (xterm, xterm-256color, linux, ...)
+    :param enable_cpr: When `True` (the default), send "cursor position
+        request" escape sequences to the output in order to detect the cursor
+        position. That way, we can properly determine how much space there is
+        available for the UI (especially for drop down menus) to render. The
+        `Renderer` will still try to figure out whether the current terminal
+        does respond to CPR escapes. When `False`, never attempt to send CPR
+        requests.
+    """
+
+    # For the error messages. Only display "Output is not a terminal" once per
+    # file descriptor.
+    _fds_not_a_terminal: Set[int] = set()
+
+    def __init__(
+        self,
+        stdout: TextIO,
+        get_size: Callable[[], Size],
+        term: Optional[str] = None,
+        default_color_depth: Optional[ColorDepth] = None,
+        enable_bell: bool = True,
+        enable_cpr: bool = True,
+    ) -> None:
+
+        assert all(hasattr(stdout, a) for a in ("write", "flush"))
+
+        self._buffer: List[str] = []
+        self.stdout: TextIO = stdout
+        self.default_color_depth = default_color_depth
+        self._get_size = get_size
+        self.term = term
+        self.enable_bell = enable_bell
+        self.enable_cpr = enable_cpr
+
+        # Cache for escape codes.
+        self._escape_code_caches: Dict[ColorDepth, _EscapeCodeCache] = {
+            ColorDepth.DEPTH_1_BIT: _EscapeCodeCache(ColorDepth.DEPTH_1_BIT),
+            ColorDepth.DEPTH_4_BIT: _EscapeCodeCache(ColorDepth.DEPTH_4_BIT),
+            ColorDepth.DEPTH_8_BIT: _EscapeCodeCache(ColorDepth.DEPTH_8_BIT),
+            ColorDepth.DEPTH_24_BIT: _EscapeCodeCache(ColorDepth.DEPTH_24_BIT),
+        }
+
+        # Keep track of whether the cursor shape was ever changed.
+        # (We don't restore the cursor shape if it was never changed - by
+        # default, we don't change them.)
+        self._cursor_shape_changed = False
+
+    @classmethod
+    def from_pty(
+        cls,
+        stdout: TextIO,
+        term: Optional[str] = None,
+        default_color_depth: Optional[ColorDepth] = None,
+        enable_bell: bool = True,
+    ) -> "Vt100_Output":
+        """
+        Create an Output class from a pseudo terminal.
+        (This will take the dimensions by reading the pseudo
+        terminal attributes.)
+        """
+        fd: Optional[int]
+        # Normally, this requires a real TTY device, but people instantiate
+        # this class often during unit tests as well. For convenience, we print
+        # an error message, use standard dimensions, and go on.
+        try:
+            fd = stdout.fileno()
+        except io.UnsupportedOperation:
+            fd = None
+
+        if not stdout.isatty() and (fd is None or fd not in cls._fds_not_a_terminal):
+            msg = "Warning: Output is not a terminal (fd=%r).\n"
+            sys.stderr.write(msg % fd)
+            sys.stderr.flush()
+            if fd is not None:
+                cls._fds_not_a_terminal.add(fd)
+
+        def get_size() -> Size:
+            # If terminal (incorrectly) reports its size as 0, pick a
+            # reasonable default.  See
+            # https://github.com/ipython/ipython/issues/10071
+            rows, columns = (None, None)
+
+            # It is possible that `stdout` is no longer a TTY device at this
+            # point. In that case we get an `OSError` in the ioctl call in
+            # `get_size`. See:
+            # https://github.com/prompt-toolkit/python-prompt-toolkit/pull/1021
+            try:
+                rows, columns = _get_size(stdout.fileno())
+            except OSError:
+                pass
+            return Size(rows=rows or 24, columns=columns or 80)
+
+        return cls(
+            stdout,
+            get_size,
+            term=term,
+            default_color_depth=default_color_depth,
+            enable_bell=enable_bell,
+        )
+
+    def get_size(self) -> Size:
+        return self._get_size()
+
+    def fileno(self) -> int:
+        "Return file descriptor."
+        return self.stdout.fileno()
+
+    def encoding(self) -> str:
+        "Return encoding used for stdout."
+        return self.stdout.encoding
+
+    def write_raw(self, data: str) -> None:
+        """
+        Write raw data to output.
+        """
+        self._buffer.append(data)
+
+    def write(self, data: str) -> None:
+        """
+        Write text to output.
+        (Removes vt100 escape codes. -- used for safely writing text.)
+        """
+        self._buffer.append(data.replace("\x1b", "?"))
+
+    def set_title(self, title: str) -> None:
+        """
+        Set terminal title.
+        """
+        if self.term not in (
+            "linux",
+            "eterm-color",
+        ):  # Not supported by the Linux console.
+            self.write_raw(
+                "\x1b]2;%s\x07" % title.replace("\x1b", "").replace("\x07", "")
+            )
+
+    def clear_title(self) -> None:
+        self.set_title("")
+
+    def erase_screen(self) -> None:
+        """
+        Erases the screen with the background colour and moves the cursor to
+        home.
+        """
+        self.write_raw("\x1b[2J")
+
+    def enter_alternate_screen(self) -> None:
+        self.write_raw("\x1b[?1049h\x1b[H")
+
+    def quit_alternate_screen(self) -> None:
+        self.write_raw("\x1b[?1049l")
+
+    def enable_mouse_support(self) -> None:
+        self.write_raw("\x1b[?1000h")
+
+        # Enable mouse-drag support.
+        self.write_raw("\x1b[?1003h")
+
+        # Enable urxvt Mouse mode. (For terminals that understand this.)
+        self.write_raw("\x1b[?1015h")
+
+        # Also enable Xterm SGR mouse mode. (For terminals that understand this.)
+        self.write_raw("\x1b[?1006h")
+
+        # Note: E.g. lxterminal understands 1000h, but not the urxvt or sgr
+        #       extensions.
+
+    def disable_mouse_support(self) -> None:
+        self.write_raw("\x1b[?1000l")
+        self.write_raw("\x1b[?1015l")
+        self.write_raw("\x1b[?1006l")
+        self.write_raw("\x1b[?1003l")
+
+    def erase_end_of_line(self) -> None:
+        """
+        Erases from the current cursor position to the end of the current line.
+        """
+        self.write_raw("\x1b[K")
+
+    def erase_down(self) -> None:
+        """
+        Erases the screen from the current line down to the bottom of the
+        screen.
+        """
+        self.write_raw("\x1b[J")
+
+    def reset_attributes(self) -> None:
+        self.write_raw("\x1b[0m")
+
+    def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
+        """
+        Create new style and output.
+
+        :param attrs: `Attrs` instance.
+        """
+        # Get current depth.
+        escape_code_cache = self._escape_code_caches[color_depth]
+
+        # Write escape character.
+        self.write_raw(escape_code_cache[attrs])
+
+    def disable_autowrap(self) -> None:
+        self.write_raw("\x1b[?7l")
+
+    def enable_autowrap(self) -> None:
+        self.write_raw("\x1b[?7h")
+
+    def enable_bracketed_paste(self) -> None:
+        self.write_raw("\x1b[?2004h")
+
+    def disable_bracketed_paste(self) -> None:
+        self.write_raw("\x1b[?2004l")
+
+    def reset_cursor_key_mode(self) -> None:
+        """
+        For vt100 only.
+        Put the terminal in cursor mode (instead of application mode).
+        """
+        # Put the terminal in cursor mode. (Instead of application mode.)
+        self.write_raw("\x1b[?1l")
+
+    def cursor_goto(self, row: int = 0, column: int = 0) -> None:
+        """
+        Move cursor position.
+        """
+        self.write_raw("\x1b[%i;%iH" % (row, column))
+
+    def cursor_up(self, amount: int) -> None:
+        if amount == 0:
+            pass
+        elif amount == 1:
+            self.write_raw("\x1b[A")
+        else:
+            self.write_raw("\x1b[%iA" % amount)
+
+    def cursor_down(self, amount: int) -> None:
+        if amount == 0:
+            pass
+        elif amount == 1:
+            # Note: Not the same as '\n', '\n' can cause the window content to
+            #       scroll.
+            self.write_raw("\x1b[B")
+        else:
+            self.write_raw("\x1b[%iB" % amount)
+
+    def cursor_forward(self, amount: int) -> None:
+        if amount == 0:
+            pass
+        elif amount == 1:
+            self.write_raw("\x1b[C")
+        else:
+            self.write_raw("\x1b[%iC" % amount)
+
+    def cursor_backward(self, amount: int) -> None:
+        if amount == 0:
+            pass
+        elif amount == 1:
+            self.write_raw("\b")  # '\x1b[D'
+        else:
+            self.write_raw("\x1b[%iD" % amount)
+
+    def hide_cursor(self) -> None:
+        self.write_raw("\x1b[?25l")
+
+    def show_cursor(self) -> None:
+        self.write_raw("\x1b[?12l\x1b[?25h")  # Stop blinking cursor and show.
+
+    def set_cursor_shape(self, cursor_shape: CursorShape) -> None:
+        if cursor_shape == CursorShape._NEVER_CHANGE:
+            return
+
+        self._cursor_shape_changed = True
+        self.write_raw(
+            {
+                CursorShape.BLOCK: "\x1b[2 q",
+                CursorShape.BEAM: "\x1b[6 q",
+                CursorShape.UNDERLINE: "\x1b[4 q",
+                CursorShape.BLINKING_BLOCK: "\x1b[1 q",
+                CursorShape.BLINKING_BEAM: "\x1b[5 q",
+                CursorShape.BLINKING_UNDERLINE: "\x1b[3 q",
+            }.get(cursor_shape, "")
+        )
+
+    def reset_cursor_shape(self) -> None:
+        "Reset cursor shape."
+        # (Only reset cursor shape, if we ever changed it.)
+        if self._cursor_shape_changed:
+            self._cursor_shape_changed = False
+
+            # Reset cursor shape.
+            self.write_raw("\x1b[0 q")
+
+    def flush(self) -> None:
+        """
+        Write to output stream and flush.
+        """
+        if not self._buffer:
+            return
+
+        data = "".join(self._buffer)
+        self._buffer = []
+
+        flush_stdout(self.stdout, data)
+
+    def ask_for_cpr(self) -> None:
+        """
+        Asks for a cursor position report (CPR).
+        """
+        self.write_raw("\x1b[6n")
+        self.flush()
+
+    @property
+    def responds_to_cpr(self) -> bool:
+        if not self.enable_cpr:
+            return False
+
+        # When the input is a tty, we assume that CPR is supported.
+        # It's not when the input is piped from Pexpect.
+        if os.environ.get("PROMPT_TOOLKIT_NO_CPR", "") == "1":
+            return False
+
+        if is_dumb_terminal(self.term):
+            return False
+        try:
+            return self.stdout.isatty()
+        except ValueError:
+            return False  # ValueError: I/O operation on closed file
+
+    def bell(self) -> None:
+        "Sound bell."
+        if self.enable_bell:
+            self.write_raw("\a")
+            self.flush()
+
+    def get_default_color_depth(self) -> ColorDepth:
+        """
+        Return the default color depth for a vt100 terminal, according to the
+        our term value.
+
+        We prefer 256 colors almost always, because this is what most terminals
+        support these days, and is a good default.
+        """
+        if self.default_color_depth is not None:
+            return self.default_color_depth
+
+        term = self.term
+
+        if term is None:
+            return ColorDepth.DEFAULT
+
+        if is_dumb_terminal(term):
+            return ColorDepth.DEPTH_1_BIT
+
+        if term in ("linux", "eterm-color"):
+            return ColorDepth.DEPTH_4_BIT
+
+        return ColorDepth.DEFAULT
diff --git a/src/prompt_toolkit/output/win32.py b/src/prompt_toolkit/output/win32.py
new file mode 100644
index 0000000..1724eae
--- /dev/null
+++ b/src/prompt_toolkit/output/win32.py
@@ -0,0 +1,687 @@
+import sys
+
+assert sys.platform == "win32"
+
+import os
+from ctypes import ArgumentError, byref, c_char, c_long, c_uint, c_ulong, pointer
+
+from ..utils import SPHINX_AUTODOC_RUNNING
+
+# Do not import win32-specific stuff when generating documentation.
+# Otherwise RTD would be unable to generate docs for this module.
+if not SPHINX_AUTODOC_RUNNING:
+    from ctypes import windll
+
+from ctypes.wintypes import DWORD, HANDLE
+from typing import Callable, Dict, List, Optional, TextIO, Tuple, Type, TypeVar, Union
+
+from prompt_toolkit.cursor_shapes import CursorShape
+from prompt_toolkit.data_structures import Size
+from prompt_toolkit.styles import ANSI_COLOR_NAMES, Attrs
+from prompt_toolkit.utils import get_cwidth
+from prompt_toolkit.win32_types import (
+    CONSOLE_SCREEN_BUFFER_INFO,
+    COORD,
+    SMALL_RECT,
+    STD_INPUT_HANDLE,
+    STD_OUTPUT_HANDLE,
+)
+
+from .base import Output
+from .color_depth import ColorDepth
+
+__all__ = [
+    "Win32Output",
+]
+
+
+def _coord_byval(coord: COORD) -> c_long:
+    """
+    Turns a COORD object into a c_long.
+    This will cause it to be passed by value instead of by reference. (That is what I think at least.)
+
+    When running ``ptipython`` is run (only with IPython), we often got the following error::
+
+         Error in 'SetConsoleCursorPosition'.
+         ArgumentError("argument 2: <class 'TypeError'>: wrong type",)
+     argument 2: <class 'TypeError'>: wrong type
+
+    It was solved by turning ``COORD`` parameters into a ``c_long`` like this.
+
+    More info: http://msdn.microsoft.com/en-us/library/windows/desktop/ms686025(v=vs.85).aspx
+    """
+    return c_long(coord.Y * 0x10000 | coord.X & 0xFFFF)
+
+
+#: If True: write the output of the renderer also to the following file. This
+#: is very useful for debugging. (e.g.: to see that we don't write more bytes
+#: than required.)
+_DEBUG_RENDER_OUTPUT = False
+_DEBUG_RENDER_OUTPUT_FILENAME = r"prompt-toolkit-windows-output.log"
+
+
+class NoConsoleScreenBufferError(Exception):
+    """
+    Raised when the application is not running inside a Windows Console, but
+    the user tries to instantiate Win32Output.
+    """
+
+    def __init__(self) -> None:
+        # Are we running in 'xterm' on Windows, like git-bash for instance?
+        xterm = "xterm" in os.environ.get("TERM", "")
+
+        if xterm:
+            message = (
+                "Found %s, while expecting a Windows console. "
+                'Maybe try to run this program using "winpty" '
+                "or run it in cmd.exe instead. Or otherwise, "
+                "in case of Cygwin, use the Python executable "
+                "that is compiled for Cygwin." % os.environ["TERM"]
+            )
+        else:
+            message = "No Windows console found. Are you running cmd.exe?"
+        super().__init__(message)
+
+
+_T = TypeVar("_T")
+
+
+class Win32Output(Output):
+    """
+    I/O abstraction for rendering to Windows consoles.
+    (cmd.exe and similar.)
+    """
+
+    def __init__(
+        self,
+        stdout: TextIO,
+        use_complete_width: bool = False,
+        default_color_depth: Optional[ColorDepth] = None,
+    ) -> None:
+        self.use_complete_width = use_complete_width
+        self.default_color_depth = default_color_depth
+
+        self._buffer: List[str] = []
+        self.stdout: TextIO = stdout
+        self.hconsole = HANDLE(windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE))
+
+        self._in_alternate_screen = False
+        self._hidden = False
+
+        self.color_lookup_table = ColorLookupTable()
+
+        # Remember the default console colors.
+        info = self.get_win32_screen_buffer_info()
+        self.default_attrs = info.wAttributes if info else 15
+
+        if _DEBUG_RENDER_OUTPUT:
+            self.LOG = open(_DEBUG_RENDER_OUTPUT_FILENAME, "ab")
+
+    def fileno(self) -> int:
+        "Return file descriptor."
+        return self.stdout.fileno()
+
+    def encoding(self) -> str:
+        "Return encoding used for stdout."
+        return self.stdout.encoding
+
+    def write(self, data: str) -> None:
+        if self._hidden:
+            data = " " * get_cwidth(data)
+
+        self._buffer.append(data)
+
+    def write_raw(self, data: str) -> None:
+        "For win32, there is no difference between write and write_raw."
+        self.write(data)
+
+    def get_size(self) -> Size:
+        info = self.get_win32_screen_buffer_info()
+
+        # We take the width of the *visible* region as the size. Not the width
+        # of the complete screen buffer. (Unless use_complete_width has been
+        # set.)
+        if self.use_complete_width:
+            width = info.dwSize.X
+        else:
+            width = info.srWindow.Right - info.srWindow.Left
+
+        height = info.srWindow.Bottom - info.srWindow.Top + 1
+
+        # We avoid the right margin, windows will wrap otherwise.
+        maxwidth = info.dwSize.X - 1
+        width = min(maxwidth, width)
+
+        # Create `Size` object.
+        return Size(rows=height, columns=width)
+
+    def _winapi(self, func: Callable[..., _T], *a: object, **kw: object) -> _T:
+        """
+        Flush and call win API function.
+        """
+        self.flush()
+
+        if _DEBUG_RENDER_OUTPUT:
+            self.LOG.write(("%r" % func.__name__).encode("utf-8") + b"\n")
+            self.LOG.write(
+                b"     " + ", ".join(["%r" % i for i in a]).encode("utf-8") + b"\n"
+            )
+            self.LOG.write(
+                b"     "
+                + ", ".join(["%r" % type(i) for i in a]).encode("utf-8")
+                + b"\n"
+            )
+            self.LOG.flush()
+
+        try:
+            return func(*a, **kw)
+        except ArgumentError as e:
+            if _DEBUG_RENDER_OUTPUT:
+                self.LOG.write((f"    Error in {func.__name__!r} {e!r} {e}\n").encode())
+
+            raise
+
+    def get_win32_screen_buffer_info(self) -> CONSOLE_SCREEN_BUFFER_INFO:
+        """
+        Return Screen buffer info.
+        """
+        # NOTE: We don't call the `GetConsoleScreenBufferInfo` API through
+        #     `self._winapi`. Doing so causes Python to crash on certain 64bit
+        #     Python versions. (Reproduced with 64bit Python 2.7.6, on Windows
+        #     10). It is not clear why. Possibly, it has to do with passing
+        #     these objects as an argument, or through *args.
+
+        # The Python documentation contains the following - possibly related - warning:
+        #     ctypes does not support passing unions or structures with
+        #     bit-fields to functions by value. While this may work on 32-bit
+        #     x86, it's not guaranteed by the library to work in the general
+        #     case. Unions and structures with bit-fields should always be
+        #     passed to functions by pointer.
+
+        # Also see:
+        #    - https://github.com/ipython/ipython/issues/10070
+        #    - https://github.com/jonathanslenders/python-prompt-toolkit/issues/406
+        #    - https://github.com/jonathanslenders/python-prompt-toolkit/issues/86
+
+        self.flush()
+        sbinfo = CONSOLE_SCREEN_BUFFER_INFO()
+        success = windll.kernel32.GetConsoleScreenBufferInfo(
+            self.hconsole, byref(sbinfo)
+        )
+
+        # success = self._winapi(windll.kernel32.GetConsoleScreenBufferInfo,
+        #                        self.hconsole, byref(sbinfo))
+
+        if success:
+            return sbinfo
+        else:
+            raise NoConsoleScreenBufferError
+
+    def set_title(self, title: str) -> None:
+        """
+        Set terminal title.
+        """
+        self._winapi(windll.kernel32.SetConsoleTitleW, title)
+
+    def clear_title(self) -> None:
+        self._winapi(windll.kernel32.SetConsoleTitleW, "")
+
+    def erase_screen(self) -> None:
+        start = COORD(0, 0)
+        sbinfo = self.get_win32_screen_buffer_info()
+        length = sbinfo.dwSize.X * sbinfo.dwSize.Y
+
+        self.cursor_goto(row=0, column=0)
+        self._erase(start, length)
+
+    def erase_down(self) -> None:
+        sbinfo = self.get_win32_screen_buffer_info()
+        size = sbinfo.dwSize
+
+        start = sbinfo.dwCursorPosition
+        length = (size.X - size.X) + size.X * (size.Y - sbinfo.dwCursorPosition.Y)
+
+        self._erase(start, length)
+
+    def erase_end_of_line(self) -> None:
+        """"""
+        sbinfo = self.get_win32_screen_buffer_info()
+        start = sbinfo.dwCursorPosition
+        length = sbinfo.dwSize.X - sbinfo.dwCursorPosition.X
+
+        self._erase(start, length)
+
+    def _erase(self, start: COORD, length: int) -> None:
+        chars_written = c_ulong()
+
+        self._winapi(
+            windll.kernel32.FillConsoleOutputCharacterA,
+            self.hconsole,
+            c_char(b" "),
+            DWORD(length),
+            _coord_byval(start),
+            byref(chars_written),
+        )
+
+        # Reset attributes.
+        sbinfo = self.get_win32_screen_buffer_info()
+        self._winapi(
+            windll.kernel32.FillConsoleOutputAttribute,
+            self.hconsole,
+            sbinfo.wAttributes,
+            length,
+            _coord_byval(start),
+            byref(chars_written),
+        )
+
+    def reset_attributes(self) -> None:
+        "Reset the console foreground/background color."
+        self._winapi(
+            windll.kernel32.SetConsoleTextAttribute, self.hconsole, self.default_attrs
+        )
+        self._hidden = False
+
+    def set_attributes(self, attrs: Attrs, color_depth: ColorDepth) -> None:
+        (
+            fgcolor,
+            bgcolor,
+            bold,
+            underline,
+            strike,
+            italic,
+            blink,
+            reverse,
+            hidden,
+        ) = attrs
+        self._hidden = bool(hidden)
+
+        # Start from the default attributes.
+        win_attrs: int = self.default_attrs
+
+        if color_depth != ColorDepth.DEPTH_1_BIT:
+            # Override the last four bits: foreground color.
+            if fgcolor:
+                win_attrs = win_attrs & ~0xF
+                win_attrs |= self.color_lookup_table.lookup_fg_color(fgcolor)
+
+            # Override the next four bits: background color.
+            if bgcolor:
+                win_attrs = win_attrs & ~0xF0
+                win_attrs |= self.color_lookup_table.lookup_bg_color(bgcolor)
+
+        # Reverse: swap these four bits groups.
+        if reverse:
+            win_attrs = (
+                (win_attrs & ~0xFF)
+                | ((win_attrs & 0xF) << 4)
+                | ((win_attrs & 0xF0) >> 4)
+            )
+
+        self._winapi(windll.kernel32.SetConsoleTextAttribute, self.hconsole, win_attrs)
+
+    def disable_autowrap(self) -> None:
+        # Not supported by Windows.
+        pass
+
+    def enable_autowrap(self) -> None:
+        # Not supported by Windows.
+        pass
+
+    def cursor_goto(self, row: int = 0, column: int = 0) -> None:
+        pos = COORD(X=column, Y=row)
+        self._winapi(
+            windll.kernel32.SetConsoleCursorPosition, self.hconsole, _coord_byval(pos)
+        )
+
+    def cursor_up(self, amount: int) -> None:
+        sr = self.get_win32_screen_buffer_info().dwCursorPosition
+        pos = COORD(X=sr.X, Y=sr.Y - amount)
+        self._winapi(
+            windll.kernel32.SetConsoleCursorPosition, self.hconsole, _coord_byval(pos)
+        )
+
+    def cursor_down(self, amount: int) -> None:
+        self.cursor_up(-amount)
+
+    def cursor_forward(self, amount: int) -> None:
+        sr = self.get_win32_screen_buffer_info().dwCursorPosition
+        #        assert sr.X + amount >= 0, 'Negative cursor position: x=%r amount=%r' % (sr.X, amount)
+
+        pos = COORD(X=max(0, sr.X + amount), Y=sr.Y)
+        self._winapi(
+            windll.kernel32.SetConsoleCursorPosition, self.hconsole, _coord_byval(pos)
+        )
+
+    def cursor_backward(self, amount: int) -> None:
+        self.cursor_forward(-amount)
+
+    def flush(self) -> None:
+        """
+        Write to output stream and flush.
+        """
+        if not self._buffer:
+            # Only flush stdout buffer. (It could be that Python still has
+            # something in its buffer. -- We want to be sure to print that in
+            # the correct color.)
+            self.stdout.flush()
+            return
+
+        data = "".join(self._buffer)
+
+        if _DEBUG_RENDER_OUTPUT:
+            self.LOG.write(("%r" % data).encode("utf-8") + b"\n")
+            self.LOG.flush()
+
+        # Print characters one by one. This appears to be the best solution
+        # in oder to avoid traces of vertical lines when the completion
+        # menu disappears.
+        for b in data:
+            written = DWORD()
+
+            retval = windll.kernel32.WriteConsoleW(
+                self.hconsole, b, 1, byref(written), None
+            )
+            assert retval != 0
+
+        self._buffer = []
+
+    def get_rows_below_cursor_position(self) -> int:
+        info = self.get_win32_screen_buffer_info()
+        return info.srWindow.Bottom - info.dwCursorPosition.Y + 1
+
+    def scroll_buffer_to_prompt(self) -> None:
+        """
+        To be called before drawing the prompt. This should scroll the console
+        to left, with the cursor at the bottom (if possible).
+        """
+        # Get current window size
+        info = self.get_win32_screen_buffer_info()
+        sr = info.srWindow
+        cursor_pos = info.dwCursorPosition
+
+        result = SMALL_RECT()
+
+        # Scroll to the left.
+        result.Left = 0
+        result.Right = sr.Right - sr.Left
+
+        # Scroll vertical
+        win_height = sr.Bottom - sr.Top
+        if 0 < sr.Bottom - cursor_pos.Y < win_height - 1:
+            # no vertical scroll if cursor already on the screen
+            result.Bottom = sr.Bottom
+        else:
+            result.Bottom = max(win_height, cursor_pos.Y)
+        result.Top = result.Bottom - win_height
+
+        # Scroll API
+        self._winapi(
+            windll.kernel32.SetConsoleWindowInfo, self.hconsole, True, byref(result)
+        )
+
+    def enter_alternate_screen(self) -> None:
+        """
+        Go to alternate screen buffer.
+        """
+        if not self._in_alternate_screen:
+            GENERIC_READ = 0x80000000
+            GENERIC_WRITE = 0x40000000
+
+            # Create a new console buffer and activate that one.
+            handle = HANDLE(
+                self._winapi(
+                    windll.kernel32.CreateConsoleScreenBuffer,
+                    GENERIC_READ | GENERIC_WRITE,
+                    DWORD(0),
+                    None,
+                    DWORD(1),
+                    None,
+                )
+            )
+
+            self._winapi(windll.kernel32.SetConsoleActiveScreenBuffer, handle)
+            self.hconsole = handle
+            self._in_alternate_screen = True
+
+    def quit_alternate_screen(self) -> None:
+        """
+        Make stdout again the active buffer.
+        """
+        if self._in_alternate_screen:
+            stdout = HANDLE(
+                self._winapi(windll.kernel32.GetStdHandle, STD_OUTPUT_HANDLE)
+            )
+            self._winapi(windll.kernel32.SetConsoleActiveScreenBuffer, stdout)
+            self._winapi(windll.kernel32.CloseHandle, self.hconsole)
+            self.hconsole = stdout
+            self._in_alternate_screen = False
+
+    def enable_mouse_support(self) -> None:
+        ENABLE_MOUSE_INPUT = 0x10
+
+        # This `ENABLE_QUICK_EDIT_MODE` flag needs to be cleared for mouse
+        # support to work, but it's possible that it was already cleared
+        # before.
+        ENABLE_QUICK_EDIT_MODE = 0x0040
+
+        handle = HANDLE(windll.kernel32.GetStdHandle(STD_INPUT_HANDLE))
+
+        original_mode = DWORD()
+        self._winapi(windll.kernel32.GetConsoleMode, handle, pointer(original_mode))
+        self._winapi(
+            windll.kernel32.SetConsoleMode,
+            handle,
+            (original_mode.value | ENABLE_MOUSE_INPUT) & ~ENABLE_QUICK_EDIT_MODE,
+        )
+
+    def disable_mouse_support(self) -> None:
+        ENABLE_MOUSE_INPUT = 0x10
+        handle = HANDLE(windll.kernel32.GetStdHandle(STD_INPUT_HANDLE))
+
+        original_mode = DWORD()
+        self._winapi(windll.kernel32.GetConsoleMode, handle, pointer(original_mode))
+        self._winapi(
+            windll.kernel32.SetConsoleMode,
+            handle,
+            original_mode.value & ~ENABLE_MOUSE_INPUT,
+        )
+
+    def hide_cursor(self) -> None:
+        pass
+
+    def show_cursor(self) -> None:
+        pass
+
+    def set_cursor_shape(self, cursor_shape: CursorShape) -> None:
+        pass
+
+    def reset_cursor_shape(self) -> None:
+        pass
+
+    @classmethod
+    def win32_refresh_window(cls) -> None:
+        """
+        Call win32 API to refresh the whole Window.
+
+        This is sometimes necessary when the application paints background
+        for completion menus. When the menu disappears, it leaves traces due
+        to a bug in the Windows Console. Sending a repaint request solves it.
+        """
+        # Get console handle
+        handle = HANDLE(windll.kernel32.GetConsoleWindow())
+
+        RDW_INVALIDATE = 0x0001
+        windll.user32.RedrawWindow(handle, None, None, c_uint(RDW_INVALIDATE))
+
+    def get_default_color_depth(self) -> ColorDepth:
+        """
+        Return the default color depth for a windows terminal.
+
+        Contrary to the Vt100 implementation, this doesn't depend on a $TERM
+        variable.
+        """
+        if self.default_color_depth is not None:
+            return self.default_color_depth
+
+        # For now, by default, always use 4 bit color on Windows 10 by default,
+        # even when vt100 escape sequences with
+        # ENABLE_VIRTUAL_TERMINAL_PROCESSING are supported. We don't have a
+        # reliable way yet to know whether our console supports true color or
+        # only 4-bit.
+        return ColorDepth.DEPTH_4_BIT
+
+
+class FOREGROUND_COLOR:
+    BLACK = 0x0000
+    BLUE = 0x0001
+    GREEN = 0x0002
+    CYAN = 0x0003
+    RED = 0x0004
+    MAGENTA = 0x0005
+    YELLOW = 0x0006
+    GRAY = 0x0007
+    INTENSITY = 0x0008  # Foreground color is intensified.
+
+
+class BACKGROUND_COLOR:
+    BLACK = 0x0000
+    BLUE = 0x0010
+    GREEN = 0x0020
+    CYAN = 0x0030
+    RED = 0x0040
+    MAGENTA = 0x0050
+    YELLOW = 0x0060
+    GRAY = 0x0070
+    INTENSITY = 0x0080  # Background color is intensified.
+
+
+def _create_ansi_color_dict(
+    color_cls: Union[Type[FOREGROUND_COLOR], Type[BACKGROUND_COLOR]]
+) -> Dict[str, int]:
+    "Create a table that maps the 16 named ansi colors to their Windows code."
+    return {
+        "ansidefault": color_cls.BLACK,
+        "ansiblack": color_cls.BLACK,
+        "ansigray": color_cls.GRAY,
+        "ansibrightblack": color_cls.BLACK | color_cls.INTENSITY,
+        "ansiwhite": color_cls.GRAY | color_cls.INTENSITY,
+        # Low intensity.
+        "ansired": color_cls.RED,
+        "ansigreen": color_cls.GREEN,
+        "ansiyellow": color_cls.YELLOW,
+        "ansiblue": color_cls.BLUE,
+        "ansimagenta": color_cls.MAGENTA,
+        "ansicyan": color_cls.CYAN,
+        # High intensity.
+        "ansibrightred": color_cls.RED | color_cls.INTENSITY,
+        "ansibrightgreen": color_cls.GREEN | color_cls.INTENSITY,
+        "ansibrightyellow": color_cls.YELLOW | color_cls.INTENSITY,
+        "ansibrightblue": color_cls.BLUE | color_cls.INTENSITY,
+        "ansibrightmagenta": color_cls.MAGENTA | color_cls.INTENSITY,
+        "ansibrightcyan": color_cls.CYAN | color_cls.INTENSITY,
+    }
+
+
+FG_ANSI_COLORS = _create_ansi_color_dict(FOREGROUND_COLOR)
+BG_ANSI_COLORS = _create_ansi_color_dict(BACKGROUND_COLOR)
+
+assert set(FG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
+assert set(BG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
+
+
+class ColorLookupTable:
+    """
+    Inspired by pygments/formatters/terminal256.py
+    """
+
+    def __init__(self) -> None:
+        self._win32_colors = self._build_color_table()
+
+        # Cache (map color string to foreground and background code).
+        self.best_match: Dict[str, Tuple[int, int]] = {}
+
+    @staticmethod
+    def _build_color_table() -> List[Tuple[int, int, int, int, int]]:
+        """
+        Build an RGB-to-256 color conversion table
+        """
+        FG = FOREGROUND_COLOR
+        BG = BACKGROUND_COLOR
+
+        return [
+            (0x00, 0x00, 0x00, FG.BLACK, BG.BLACK),
+            (0x00, 0x00, 0xAA, FG.BLUE, BG.BLUE),
+            (0x00, 0xAA, 0x00, FG.GREEN, BG.GREEN),
+            (0x00, 0xAA, 0xAA, FG.CYAN, BG.CYAN),
+            (0xAA, 0x00, 0x00, FG.RED, BG.RED),
+            (0xAA, 0x00, 0xAA, FG.MAGENTA, BG.MAGENTA),
+            (0xAA, 0xAA, 0x00, FG.YELLOW, BG.YELLOW),
+            (0x88, 0x88, 0x88, FG.GRAY, BG.GRAY),
+            (0x44, 0x44, 0xFF, FG.BLUE | FG.INTENSITY, BG.BLUE | BG.INTENSITY),
+            (0x44, 0xFF, 0x44, FG.GREEN | FG.INTENSITY, BG.GREEN | BG.INTENSITY),
+            (0x44, 0xFF, 0xFF, FG.CYAN | FG.INTENSITY, BG.CYAN | BG.INTENSITY),
+            (0xFF, 0x44, 0x44, FG.RED | FG.INTENSITY, BG.RED | BG.INTENSITY),
+            (0xFF, 0x44, 0xFF, FG.MAGENTA | FG.INTENSITY, BG.MAGENTA | BG.INTENSITY),
+            (0xFF, 0xFF, 0x44, FG.YELLOW | FG.INTENSITY, BG.YELLOW | BG.INTENSITY),
+            (0x44, 0x44, 0x44, FG.BLACK | FG.INTENSITY, BG.BLACK | BG.INTENSITY),
+            (0xFF, 0xFF, 0xFF, FG.GRAY | FG.INTENSITY, BG.GRAY | BG.INTENSITY),
+        ]
+
+    def _closest_color(self, r: int, g: int, b: int) -> Tuple[int, int]:
+        distance = 257 * 257 * 3  # "infinity" (>distance from #000000 to #ffffff)
+        fg_match = 0
+        bg_match = 0
+
+        for r_, g_, b_, fg_, bg_ in self._win32_colors:
+            rd = r - r_
+            gd = g - g_
+            bd = b - b_
+
+            d = rd * rd + gd * gd + bd * bd
+
+            if d < distance:
+                fg_match = fg_
+                bg_match = bg_
+                distance = d
+        return fg_match, bg_match
+
+    def _color_indexes(self, color: str) -> Tuple[int, int]:
+        indexes = self.best_match.get(color, None)
+        if indexes is None:
+            try:
+                rgb = int(str(color), 16)
+            except ValueError:
+                rgb = 0
+
+            r = (rgb >> 16) & 0xFF
+            g = (rgb >> 8) & 0xFF
+            b = rgb & 0xFF
+            indexes = self._closest_color(r, g, b)
+            self.best_match[color] = indexes
+        return indexes
+
+    def lookup_fg_color(self, fg_color: str) -> int:
+        """
+        Return the color for use in the
+        `windll.kernel32.SetConsoleTextAttribute` API call.
+
+        :param fg_color: Foreground as text. E.g. 'ffffff' or 'red'
+        """
+        # Foreground.
+        if fg_color in FG_ANSI_COLORS:
+            return FG_ANSI_COLORS[fg_color]
+        else:
+            return self._color_indexes(fg_color)[0]
+
+    def lookup_bg_color(self, bg_color: str) -> int:
+        """
+        Return the color for use in the
+        `windll.kernel32.SetConsoleTextAttribute` API call.
+
+        :param bg_color: Background as text. E.g. 'ffffff' or 'red'
+        """
+        # Background.
+        if bg_color in BG_ANSI_COLORS:
+            return BG_ANSI_COLORS[bg_color]
+        else:
+            return self._color_indexes(bg_color)[1]
diff --git a/src/prompt_toolkit/output/windows10.py b/src/prompt_toolkit/output/windows10.py
new file mode 100644
index 0000000..d5d55f1
--- /dev/null
+++ b/src/prompt_toolkit/output/windows10.py
@@ -0,0 +1,107 @@
+import sys
+
+assert sys.platform == "win32"
+
+from ctypes import byref, windll
+from ctypes.wintypes import DWORD, HANDLE
+from typing import Any, Optional, TextIO
+
+from prompt_toolkit.data_structures import Size
+from prompt_toolkit.win32_types import STD_OUTPUT_HANDLE
+
+from .base import Output
+from .color_depth import ColorDepth
+from .vt100 import Vt100_Output
+from .win32 import Win32Output
+
+__all__ = [
+    "Windows10_Output",
+]
+
+# See: https://msdn.microsoft.com/pl-pl/library/windows/desktop/ms686033(v=vs.85).aspx
+ENABLE_PROCESSED_INPUT = 0x0001
+ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004
+
+
+class Windows10_Output:
+    """
+    Windows 10 output abstraction. This enables and uses vt100 escape sequences.
+    """
+
+    def __init__(
+        self, stdout: TextIO, default_color_depth: Optional[ColorDepth] = None
+    ) -> None:
+        self.win32_output = Win32Output(stdout, default_color_depth=default_color_depth)
+        self.vt100_output = Vt100_Output(
+            stdout, lambda: Size(0, 0), default_color_depth=default_color_depth
+        )
+        self._hconsole = HANDLE(windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE))
+
+    def flush(self) -> None:
+        """
+        Write to output stream and flush.
+        """
+        original_mode = DWORD(0)
+
+        # Remember the previous console mode.
+        windll.kernel32.GetConsoleMode(self._hconsole, byref(original_mode))
+
+        # Enable processing of vt100 sequences.
+        windll.kernel32.SetConsoleMode(
+            self._hconsole,
+            DWORD(ENABLE_PROCESSED_INPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING),
+        )
+
+        try:
+            self.vt100_output.flush()
+        finally:
+            # Restore console mode.
+            windll.kernel32.SetConsoleMode(self._hconsole, original_mode)
+
+    @property
+    def responds_to_cpr(self) -> bool:
+        return False  # We don't need this on Windows.
+
+    def __getattr__(self, name: str) -> Any:
+        if name in (
+            "get_size",
+            "get_rows_below_cursor_position",
+            "enable_mouse_support",
+            "disable_mouse_support",
+            "scroll_buffer_to_prompt",
+            "get_win32_screen_buffer_info",
+            "enable_bracketed_paste",
+            "disable_bracketed_paste",
+            "get_default_color_depth",
+        ):
+            return getattr(self.win32_output, name)
+        else:
+            return getattr(self.vt100_output, name)
+
+
+Output.register(Windows10_Output)
+
+
+def is_win_vt100_enabled() -> bool:
+    """
+    Returns True when we're running Windows and VT100 escape sequences are
+    supported.
+    """
+    if sys.platform != "win32":
+        return False
+
+    hconsole = HANDLE(windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE))
+
+    # Get original console mode.
+    original_mode = DWORD(0)
+    windll.kernel32.GetConsoleMode(hconsole, byref(original_mode))
+
+    try:
+        # Try to enable VT100 sequences.
+        result: int = windll.kernel32.SetConsoleMode(
+            hconsole, DWORD(ENABLE_PROCESSED_INPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+        )
+
+        return result == 1
+    finally:
+        windll.kernel32.SetConsoleMode(hconsole, original_mode)