intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 104 insertions, 0 deletions

diff --git a/contrib/python/prompt-toolkit/py3/prompt_toolkit/output/windows10.py b/contrib/python/prompt-toolkit/py3/prompt_toolkit/output/windows10.py
new file mode 100644
index 0000000000..933f54a28f
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py3/prompt_toolkit/output/windows10.py
@@ -0,0 +1,104 @@
+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.utils import is_windows
+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 not is_windows():
+        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)