Restoring authorship annotation for <shadchin@yandex-team.ru>. Commit 1 of 2.

1 files changed, 346 insertions, 346 deletions

diff --git a/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/bindings/mouse.py b/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/bindings/mouse.py
index 949c33f72c2..bf9f644beb4 100644
--- a/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/bindings/mouse.py
+++ b/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/bindings/mouse.py
@@ -1,346 +1,346 @@
-from typing import TYPE_CHECKING, FrozenSet
-
-from prompt_toolkit.data_structures import Point
-from prompt_toolkit.key_binding.key_processor import KeyPress, KeyPressEvent
-from prompt_toolkit.keys import Keys
-from prompt_toolkit.mouse_events import (
-    MouseButton,
-    MouseEvent,
-    MouseEventType,
-    MouseModifier,
-)
-from prompt_toolkit.utils import is_windows
-
-from ..key_bindings import KeyBindings
-
-if TYPE_CHECKING:
-    from prompt_toolkit.key_binding.key_bindings import NotImplementedOrNone
-
-__all__ = [
-    "load_mouse_bindings",
-]
-
-E = KeyPressEvent
-
-# fmt: off
-# flake8: noqa E201
-SCROLL_UP   = MouseEventType.SCROLL_UP
-SCROLL_DOWN = MouseEventType.SCROLL_DOWN
-MOUSE_DOWN  = MouseEventType.MOUSE_DOWN
-MOUSE_MOVE  = MouseEventType.MOUSE_MOVE
-MOUSE_UP    = MouseEventType.MOUSE_UP
-
-NO_MODIFIER      : FrozenSet[MouseModifier] = frozenset()
-SHIFT            : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT})
-ALT              : FrozenSet[MouseModifier] = frozenset({MouseModifier.ALT})
-SHIFT_ALT        : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.ALT})
-CONTROL          : FrozenSet[MouseModifier] = frozenset({MouseModifier.CONTROL})
-SHIFT_CONTROL    : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.CONTROL})
-ALT_CONTROL      : FrozenSet[MouseModifier] = frozenset({MouseModifier.ALT, MouseModifier.CONTROL})
-SHIFT_ALT_CONTROL: FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.ALT, MouseModifier.CONTROL})
-UNKNOWN_MODIFIER : FrozenSet[MouseModifier] = frozenset()
-
-LEFT           = MouseButton.LEFT
-MIDDLE         = MouseButton.MIDDLE
-RIGHT          = MouseButton.RIGHT
-NO_BUTTON      = MouseButton.NONE
-UNKNOWN_BUTTON = MouseButton.UNKNOWN
-
-xterm_sgr_mouse_events = {
-    ( 0, 'm') : (LEFT, MOUSE_UP, NO_MODIFIER),                # left_up                       0+ + +  =0
-    ( 4, 'm') : (LEFT, MOUSE_UP, SHIFT),                      # left_up     Shift             0+4+ +  =4
-    ( 8, 'm') : (LEFT, MOUSE_UP, ALT),                        # left_up           Alt         0+ +8+  =8
-    (12, 'm') : (LEFT, MOUSE_UP, SHIFT_ALT),                  # left_up     Shift Alt         0+4+8+  =12
-    (16, 'm') : (LEFT, MOUSE_UP, CONTROL),                    # left_up               Control 0+ + +16=16
-    (20, 'm') : (LEFT, MOUSE_UP, SHIFT_CONTROL),              # left_up     Shift     Control 0+4+ +16=20
-    (24, 'm') : (LEFT, MOUSE_UP, ALT_CONTROL),                # left_up           Alt Control 0+ +8+16=24
-    (28, 'm') : (LEFT, MOUSE_UP, SHIFT_ALT_CONTROL),          # left_up     Shift Alt Control 0+4+8+16=28
-
-    ( 1, 'm') : (MIDDLE, MOUSE_UP, NO_MODIFIER),              # middle_up                     1+ + +  =1
-    ( 5, 'm') : (MIDDLE, MOUSE_UP, SHIFT),                    # middle_up   Shift             1+4+ +  =5
-    ( 9, 'm') : (MIDDLE, MOUSE_UP, ALT),                      # middle_up         Alt         1+ +8+  =9
-    (13, 'm') : (MIDDLE, MOUSE_UP, SHIFT_ALT),                # middle_up   Shift Alt         1+4+8+  =13
-    (17, 'm') : (MIDDLE, MOUSE_UP, CONTROL),                  # middle_up             Control 1+ + +16=17
-    (21, 'm') : (MIDDLE, MOUSE_UP, SHIFT_CONTROL),            # middle_up   Shift     Control 1+4+ +16=21
-    (25, 'm') : (MIDDLE, MOUSE_UP, ALT_CONTROL),              # middle_up         Alt Control 1+ +8+16=25
-    (29, 'm') : (MIDDLE, MOUSE_UP, SHIFT_ALT_CONTROL),        # middle_up   Shift Alt Control 1+4+8+16=29
-
-    ( 2, 'm') : (RIGHT, MOUSE_UP, NO_MODIFIER),               # right_up                      2+ + +  =2
-    ( 6, 'm') : (RIGHT, MOUSE_UP, SHIFT),                     # right_up    Shift             2+4+ +  =6
-    (10, 'm') : (RIGHT, MOUSE_UP, ALT),                       # right_up          Alt         2+ +8+  =10
-    (14, 'm') : (RIGHT, MOUSE_UP, SHIFT_ALT),                 # right_up    Shift Alt         2+4+8+  =14
-    (18, 'm') : (RIGHT, MOUSE_UP, CONTROL),                   # right_up              Control 2+ + +16=18
-    (22, 'm') : (RIGHT, MOUSE_UP, SHIFT_CONTROL),             # right_up    Shift     Control 2+4+ +16=22
-    (26, 'm') : (RIGHT, MOUSE_UP, ALT_CONTROL),               # right_up          Alt Control 2+ +8+16=26
-    (30, 'm') : (RIGHT, MOUSE_UP, SHIFT_ALT_CONTROL),         # right_up    Shift Alt Control 2+4+8+16=30
-
-    ( 0, 'M') : (LEFT, MOUSE_DOWN, NO_MODIFIER),              # left_down                     0+ + +  =0
-    ( 4, 'M') : (LEFT, MOUSE_DOWN, SHIFT),                    # left_down   Shift             0+4+ +  =4
-    ( 8, 'M') : (LEFT, MOUSE_DOWN, ALT),                      # left_down         Alt         0+ +8+  =8
-    (12, 'M') : (LEFT, MOUSE_DOWN, SHIFT_ALT),                # left_down   Shift Alt         0+4+8+  =12
-    (16, 'M') : (LEFT, MOUSE_DOWN, CONTROL),                  # left_down             Control 0+ + +16=16
-    (20, 'M') : (LEFT, MOUSE_DOWN, SHIFT_CONTROL),            # left_down   Shift     Control 0+4+ +16=20
-    (24, 'M') : (LEFT, MOUSE_DOWN, ALT_CONTROL),              # left_down         Alt Control 0+ +8+16=24
-    (28, 'M') : (LEFT, MOUSE_DOWN, SHIFT_ALT_CONTROL),        # left_down   Shift Alt Control 0+4+8+16=28
-
-    ( 1, 'M') : (MIDDLE, MOUSE_DOWN, NO_MODIFIER),            # middle_down                   1+ + +  =1
-    ( 5, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT),                  # middle_down Shift             1+4+ +  =5
-    ( 9, 'M') : (MIDDLE, MOUSE_DOWN, ALT),                    # middle_down       Alt         1+ +8+  =9
-    (13, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_ALT),              # middle_down Shift Alt         1+4+8+  =13
-    (17, 'M') : (MIDDLE, MOUSE_DOWN, CONTROL),                # middle_down           Control 1+ + +16=17
-    (21, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_CONTROL),          # middle_down Shift     Control 1+4+ +16=21
-    (25, 'M') : (MIDDLE, MOUSE_DOWN, ALT_CONTROL),            # middle_down       Alt Control 1+ +8+16=25
-    (29, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_ALT_CONTROL),      # middle_down Shift Alt Control 1+4+8+16=29
-
-    ( 2, 'M') : (RIGHT, MOUSE_DOWN, NO_MODIFIER),             # right_down                    2+ + +  =2
-    ( 6, 'M') : (RIGHT, MOUSE_DOWN, SHIFT),                   # right_down  Shift             2+4+ +  =6
-    (10, 'M') : (RIGHT, MOUSE_DOWN, ALT),                     # right_down        Alt         2+ +8+  =10
-    (14, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_ALT),               # right_down  Shift Alt         2+4+8+  =14
-    (18, 'M') : (RIGHT, MOUSE_DOWN, CONTROL),                 # right_down            Control 2+ + +16=18
-    (22, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_CONTROL),           # right_down  Shift     Control 2+4+ +16=22
-    (26, 'M') : (RIGHT, MOUSE_DOWN, ALT_CONTROL),             # right_down        Alt Control 2+ +8+16=26
-    (30, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_ALT_CONTROL),       # right_down  Shift Alt Control 2+4+8+16=30
-
-    (32, 'M') : (LEFT, MOUSE_MOVE, NO_MODIFIER),              # left_drag                     32+ + +  =32
-    (36, 'M') : (LEFT, MOUSE_MOVE, SHIFT),                    # left_drag   Shift             32+4+ +  =36
-    (40, 'M') : (LEFT, MOUSE_MOVE, ALT),                      # left_drag         Alt         32+ +8+  =40
-    (44, 'M') : (LEFT, MOUSE_MOVE, SHIFT_ALT),                # left_drag   Shift Alt         32+4+8+  =44
-    (48, 'M') : (LEFT, MOUSE_MOVE, CONTROL),                  # left_drag             Control 32+ + +16=48
-    (52, 'M') : (LEFT, MOUSE_MOVE, SHIFT_CONTROL),            # left_drag   Shift     Control 32+4+ +16=52
-    (56, 'M') : (LEFT, MOUSE_MOVE, ALT_CONTROL),              # left_drag         Alt Control 32+ +8+16=56
-    (60, 'M') : (LEFT, MOUSE_MOVE, SHIFT_ALT_CONTROL),        # left_drag   Shift Alt Control 32+4+8+16=60
-
-    (33, 'M') : (MIDDLE, MOUSE_MOVE, NO_MODIFIER),            # middle_drag                   33+ + +  =33
-    (37, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT),                  # middle_drag Shift             33+4+ +  =37
-    (41, 'M') : (MIDDLE, MOUSE_MOVE, ALT),                    # middle_drag       Alt         33+ +8+  =41
-    (45, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_ALT),              # middle_drag Shift Alt         33+4+8+  =45
-    (49, 'M') : (MIDDLE, MOUSE_MOVE, CONTROL),                # middle_drag           Control 33+ + +16=49
-    (53, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_CONTROL),          # middle_drag Shift     Control 33+4+ +16=53
-    (57, 'M') : (MIDDLE, MOUSE_MOVE, ALT_CONTROL),            # middle_drag       Alt Control 33+ +8+16=57
-    (61, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_ALT_CONTROL),      # middle_drag Shift Alt Control 33+4+8+16=61
-
-    (34, 'M') : (RIGHT, MOUSE_MOVE, NO_MODIFIER),             # right_drag                    34+ + +  =34
-    (38, 'M') : (RIGHT, MOUSE_MOVE, SHIFT),                   # right_drag  Shift             34+4+ +  =38
-    (42, 'M') : (RIGHT, MOUSE_MOVE, ALT),                     # right_drag        Alt         34+ +8+  =42
-    (46, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_ALT),               # right_drag  Shift Alt         34+4+8+  =46
-    (50, 'M') : (RIGHT, MOUSE_MOVE, CONTROL),                 # right_drag            Control 34+ + +16=50
-    (54, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_CONTROL),           # right_drag  Shift     Control 34+4+ +16=54
-    (58, 'M') : (RIGHT, MOUSE_MOVE, ALT_CONTROL),             # right_drag        Alt Control 34+ +8+16=58
-    (62, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_ALT_CONTROL),       # right_drag  Shift Alt Control 34+4+8+16=62
-
-    (35, 'M') : (NO_BUTTON, MOUSE_MOVE, NO_MODIFIER),         # none_drag                     35+ + +  =35
-    (39, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT),               # none_drag   Shift             35+4+ +  =39
-    (43, 'M') : (NO_BUTTON, MOUSE_MOVE, ALT),                 # none_drag         Alt         35+ +8+  =43
-    (47, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_ALT),           # none_drag   Shift Alt         35+4+8+  =47
-    (51, 'M') : (NO_BUTTON, MOUSE_MOVE, CONTROL),             # none_drag             Control 35+ + +16=51
-    (55, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_CONTROL),       # none_drag   Shift     Control 35+4+ +16=55
-    (59, 'M') : (NO_BUTTON, MOUSE_MOVE, ALT_CONTROL),         # none_drag         Alt Control 35+ +8+16=59
-    (63, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_ALT_CONTROL),   # none_drag   Shift Alt Control 35+4+8+16=63
-
-    (64, 'M') : (NO_BUTTON, SCROLL_UP, NO_MODIFIER),          # scroll_up                     64+ + +  =64
-    (68, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT),                # scroll_up   Shift             64+4+ +  =68
-    (72, 'M') : (NO_BUTTON, SCROLL_UP, ALT),                  # scroll_up         Alt         64+ +8+  =72
-    (76, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_ALT),            # scroll_up   Shift Alt         64+4+8+  =76
-    (80, 'M') : (NO_BUTTON, SCROLL_UP, CONTROL),              # scroll_up             Control 64+ + +16=80
-    (84, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_CONTROL),        # scroll_up   Shift     Control 64+4+ +16=84
-    (88, 'M') : (NO_BUTTON, SCROLL_UP, ALT_CONTROL),          # scroll_up         Alt Control 64+ +8+16=88
-    (92, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_ALT_CONTROL),    # scroll_up   Shift Alt Control 64+4+8+16=92
-
-    (65, 'M') : (NO_BUTTON, SCROLL_DOWN, NO_MODIFIER),        # scroll_down                   64+ + +  =65
-    (69, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT),              # scroll_down Shift             64+4+ +  =69
-    (73, 'M') : (NO_BUTTON, SCROLL_DOWN, ALT),                # scroll_down       Alt         64+ +8+  =73
-    (77, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_ALT),          # scroll_down Shift Alt         64+4+8+  =77
-    (81, 'M') : (NO_BUTTON, SCROLL_DOWN, CONTROL),            # scroll_down           Control 64+ + +16=81
-    (85, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_CONTROL),      # scroll_down Shift     Control 64+4+ +16=85
-    (89, 'M') : (NO_BUTTON, SCROLL_DOWN, ALT_CONTROL),        # scroll_down       Alt Control 64+ +8+16=89
-    (93, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_ALT_CONTROL),  # scroll_down Shift Alt Control 64+4+8+16=93
-}
-
-typical_mouse_events = {
-    32: (LEFT           , MOUSE_DOWN , UNKNOWN_MODIFIER),
-    33: (MIDDLE         , MOUSE_DOWN , UNKNOWN_MODIFIER),
-    34: (RIGHT          , MOUSE_DOWN , UNKNOWN_MODIFIER),
-    35: (UNKNOWN_BUTTON , MOUSE_UP   , UNKNOWN_MODIFIER),
-
-    64: (LEFT           , MOUSE_MOVE , UNKNOWN_MODIFIER),
-    65: (MIDDLE         , MOUSE_MOVE , UNKNOWN_MODIFIER),
-    66: (RIGHT          , MOUSE_MOVE , UNKNOWN_MODIFIER),
-    67: (NO_BUTTON      , MOUSE_MOVE , UNKNOWN_MODIFIER),
-
-    96: (NO_BUTTON      , SCROLL_UP  , UNKNOWN_MODIFIER),
-    97: (NO_BUTTON      , SCROLL_DOWN, UNKNOWN_MODIFIER),
-}
-
-urxvt_mouse_events={
-    32: (UNKNOWN_BUTTON, MOUSE_DOWN , UNKNOWN_MODIFIER),
-    35: (UNKNOWN_BUTTON, MOUSE_UP   , UNKNOWN_MODIFIER),
-    96: (NO_BUTTON     , SCROLL_UP  , UNKNOWN_MODIFIER),
-    97: (NO_BUTTON     , SCROLL_DOWN, UNKNOWN_MODIFIER),
-}
-# fmt:on
-
-
-def load_mouse_bindings() -> KeyBindings:
-    """
-    Key bindings, required for mouse support.
-    (Mouse events enter through the key binding system.)
-    """
-    key_bindings = KeyBindings()
-
-    @key_bindings.add(Keys.Vt100MouseEvent)
-    def _(event: E) -> "NotImplementedOrNone":
-        """
-        Handling of incoming mouse event.
-        """
-        # TypicaL:   "eSC[MaB*"
-        # Urxvt:     "Esc[96;14;13M"
-        # Xterm SGR: "Esc[<64;85;12M"
-
-        # Parse incoming packet.
-        if event.data[2] == "M":
-            # Typical.
-            mouse_event, x, y = map(ord, event.data[3:])
-
-            # TODO: Is it possible to add modifiers here?
-            mouse_button, mouse_event_type, mouse_modifier = typical_mouse_events[
-                mouse_event
-            ]
-
-            # Handle situations where `PosixStdinReader` used surrogateescapes.
-            if x >= 0xDC00:
-                x -= 0xDC00
-            if y >= 0xDC00:
-                y -= 0xDC00
-
-            x -= 32
-            y -= 32
-        else:
-            # Urxvt and Xterm SGR.
-            # When the '<' is not present, we are not using the Xterm SGR mode,
-            # but Urxvt instead.
-            data = event.data[2:]
-            if data[:1] == "<":
-                sgr = True
-                data = data[1:]
-            else:
-                sgr = False
-
-            # Extract coordinates.
-            mouse_event, x, y = map(int, data[:-1].split(";"))
-            m = data[-1]
-
-            # Parse event type.
-            if sgr:
-                try:
-                    (
-                        mouse_button,
-                        mouse_event_type,
-                        mouse_modifiers,
-                    ) = xterm_sgr_mouse_events[mouse_event, m]
-                except KeyError:
-                    return NotImplemented
-
-            else:
-                # Some other terminals, like urxvt, Hyper terminal, ...
-                (
-                    mouse_button,
-                    mouse_event_type,
-                    mouse_modifiers,
-                ) = urxvt_mouse_events.get(
-                    mouse_event, (UNKNOWN_BUTTON, MOUSE_MOVE, UNKNOWN_MODIFIER)
-                )
-
-        x -= 1
-        y -= 1
-
-        # Only handle mouse events when we know the window height.
-        if event.app.renderer.height_is_known and mouse_event_type is not None:
-            # Take region above the layout into account. The reported
-            # coordinates are absolute to the visible part of the terminal.
-            from prompt_toolkit.renderer import HeightIsUnknownError
-
-            try:
-                y -= event.app.renderer.rows_above_layout
-            except HeightIsUnknownError:
-                return NotImplemented
-
-            # Call the mouse handler from the renderer.
-
-            # Note: This can return `NotImplemented` if no mouse handler was
-            #       found for this position, or if no repainting needs to
-            #       happen. this way, we avoid excessive repaints during mouse
-            #       movements.
-            handler = event.app.renderer.mouse_handlers.mouse_handlers[y][x]
-            return handler(
-                MouseEvent(
-                    position=Point(x=x, y=y),
-                    event_type=mouse_event_type,
-                    button=mouse_button,
-                    modifiers=mouse_modifiers,
-                )
-            )
-
-        return NotImplemented
-
-    @key_bindings.add(Keys.ScrollUp)
-    def _scroll_up(event: E) -> None:
-        """
-        Scroll up event without cursor position.
-        """
-        # We don't receive a cursor position, so we don't know which window to
-        # scroll. Just send an 'up' key press instead.
-        event.key_processor.feed(KeyPress(Keys.Up), first=True)
-
-    @key_bindings.add(Keys.ScrollDown)
-    def _scroll_down(event: E) -> None:
-        """
-        Scroll down event without cursor position.
-        """
-        event.key_processor.feed(KeyPress(Keys.Down), first=True)
-
-    @key_bindings.add(Keys.WindowsMouseEvent)
-    def _mouse(event: E) -> "NotImplementedOrNone":
-        """
-        Handling of mouse events for Windows.
-        """
-        assert is_windows()  # This key binding should only exist for Windows.
-
-        # Parse data.
-        pieces = event.data.split(";")
-
-        button = MouseButton(pieces[0])
-        event_type = MouseEventType(pieces[1])
-        x = int(pieces[2])
-        y = int(pieces[3])
-
-        # Make coordinates absolute to the visible part of the terminal.
-        output = event.app.renderer.output
-
-        from prompt_toolkit.output.win32 import Win32Output
-        from prompt_toolkit.output.windows10 import Windows10_Output
-
-        if isinstance(output, (Win32Output, Windows10_Output)):
-            screen_buffer_info = output.get_win32_screen_buffer_info()
-            rows_above_cursor = (
-                screen_buffer_info.dwCursorPosition.Y - event.app.renderer._cursor_pos.y
-            )
-            y -= rows_above_cursor
-
-            # Call the mouse event handler.
-            # (Can return `NotImplemented`.)
-            handler = event.app.renderer.mouse_handlers.mouse_handlers[y][x]
-
-            return handler(
-                MouseEvent(
-                    position=Point(x=x, y=y),
-                    event_type=event_type,
-                    button=button,
-                    modifiers=UNKNOWN_MODIFIER,
-                )
-            )
-
-        # No mouse handler found. Return `NotImplemented` so that we don't
-        # invalidate the UI.
-        return NotImplemented
-
-    return key_bindings
+from typing import TYPE_CHECKING, FrozenSet 
+ 
+from prompt_toolkit.data_structures import Point 
+from prompt_toolkit.key_binding.key_processor import KeyPress, KeyPressEvent 
+from prompt_toolkit.keys import Keys 
+from prompt_toolkit.mouse_events import ( 
+    MouseButton, 
+    MouseEvent, 
+    MouseEventType, 
+    MouseModifier, 
+) 
+from prompt_toolkit.utils import is_windows 
+ 
+from ..key_bindings import KeyBindings 
+ 
+if TYPE_CHECKING: 
+    from prompt_toolkit.key_binding.key_bindings import NotImplementedOrNone 
+ 
+__all__ = [ 
+    "load_mouse_bindings", 
+] 
+ 
+E = KeyPressEvent 
+ 
+# fmt: off 
+# flake8: noqa E201 
+SCROLL_UP   = MouseEventType.SCROLL_UP 
+SCROLL_DOWN = MouseEventType.SCROLL_DOWN 
+MOUSE_DOWN  = MouseEventType.MOUSE_DOWN 
+MOUSE_MOVE  = MouseEventType.MOUSE_MOVE 
+MOUSE_UP    = MouseEventType.MOUSE_UP 
+ 
+NO_MODIFIER      : FrozenSet[MouseModifier] = frozenset() 
+SHIFT            : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT}) 
+ALT              : FrozenSet[MouseModifier] = frozenset({MouseModifier.ALT}) 
+SHIFT_ALT        : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.ALT}) 
+CONTROL          : FrozenSet[MouseModifier] = frozenset({MouseModifier.CONTROL}) 
+SHIFT_CONTROL    : FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.CONTROL}) 
+ALT_CONTROL      : FrozenSet[MouseModifier] = frozenset({MouseModifier.ALT, MouseModifier.CONTROL}) 
+SHIFT_ALT_CONTROL: FrozenSet[MouseModifier] = frozenset({MouseModifier.SHIFT, MouseModifier.ALT, MouseModifier.CONTROL}) 
+UNKNOWN_MODIFIER : FrozenSet[MouseModifier] = frozenset() 
+ 
+LEFT           = MouseButton.LEFT 
+MIDDLE         = MouseButton.MIDDLE 
+RIGHT          = MouseButton.RIGHT 
+NO_BUTTON      = MouseButton.NONE 
+UNKNOWN_BUTTON = MouseButton.UNKNOWN 
+ 
+xterm_sgr_mouse_events = { 
+    ( 0, 'm') : (LEFT, MOUSE_UP, NO_MODIFIER),                # left_up                       0+ + +  =0 
+    ( 4, 'm') : (LEFT, MOUSE_UP, SHIFT),                      # left_up     Shift             0+4+ +  =4 
+    ( 8, 'm') : (LEFT, MOUSE_UP, ALT),                        # left_up           Alt         0+ +8+  =8 
+    (12, 'm') : (LEFT, MOUSE_UP, SHIFT_ALT),                  # left_up     Shift Alt         0+4+8+  =12 
+    (16, 'm') : (LEFT, MOUSE_UP, CONTROL),                    # left_up               Control 0+ + +16=16 
+    (20, 'm') : (LEFT, MOUSE_UP, SHIFT_CONTROL),              # left_up     Shift     Control 0+4+ +16=20 
+    (24, 'm') : (LEFT, MOUSE_UP, ALT_CONTROL),                # left_up           Alt Control 0+ +8+16=24 
+    (28, 'm') : (LEFT, MOUSE_UP, SHIFT_ALT_CONTROL),          # left_up     Shift Alt Control 0+4+8+16=28 
+ 
+    ( 1, 'm') : (MIDDLE, MOUSE_UP, NO_MODIFIER),              # middle_up                     1+ + +  =1 
+    ( 5, 'm') : (MIDDLE, MOUSE_UP, SHIFT),                    # middle_up   Shift             1+4+ +  =5 
+    ( 9, 'm') : (MIDDLE, MOUSE_UP, ALT),                      # middle_up         Alt         1+ +8+  =9 
+    (13, 'm') : (MIDDLE, MOUSE_UP, SHIFT_ALT),                # middle_up   Shift Alt         1+4+8+  =13 
+    (17, 'm') : (MIDDLE, MOUSE_UP, CONTROL),                  # middle_up             Control 1+ + +16=17 
+    (21, 'm') : (MIDDLE, MOUSE_UP, SHIFT_CONTROL),            # middle_up   Shift     Control 1+4+ +16=21 
+    (25, 'm') : (MIDDLE, MOUSE_UP, ALT_CONTROL),              # middle_up         Alt Control 1+ +8+16=25 
+    (29, 'm') : (MIDDLE, MOUSE_UP, SHIFT_ALT_CONTROL),        # middle_up   Shift Alt Control 1+4+8+16=29 
+ 
+    ( 2, 'm') : (RIGHT, MOUSE_UP, NO_MODIFIER),               # right_up                      2+ + +  =2 
+    ( 6, 'm') : (RIGHT, MOUSE_UP, SHIFT),                     # right_up    Shift             2+4+ +  =6 
+    (10, 'm') : (RIGHT, MOUSE_UP, ALT),                       # right_up          Alt         2+ +8+  =10 
+    (14, 'm') : (RIGHT, MOUSE_UP, SHIFT_ALT),                 # right_up    Shift Alt         2+4+8+  =14 
+    (18, 'm') : (RIGHT, MOUSE_UP, CONTROL),                   # right_up              Control 2+ + +16=18 
+    (22, 'm') : (RIGHT, MOUSE_UP, SHIFT_CONTROL),             # right_up    Shift     Control 2+4+ +16=22 
+    (26, 'm') : (RIGHT, MOUSE_UP, ALT_CONTROL),               # right_up          Alt Control 2+ +8+16=26 
+    (30, 'm') : (RIGHT, MOUSE_UP, SHIFT_ALT_CONTROL),         # right_up    Shift Alt Control 2+4+8+16=30 
+ 
+    ( 0, 'M') : (LEFT, MOUSE_DOWN, NO_MODIFIER),              # left_down                     0+ + +  =0 
+    ( 4, 'M') : (LEFT, MOUSE_DOWN, SHIFT),                    # left_down   Shift             0+4+ +  =4 
+    ( 8, 'M') : (LEFT, MOUSE_DOWN, ALT),                      # left_down         Alt         0+ +8+  =8 
+    (12, 'M') : (LEFT, MOUSE_DOWN, SHIFT_ALT),                # left_down   Shift Alt         0+4+8+  =12 
+    (16, 'M') : (LEFT, MOUSE_DOWN, CONTROL),                  # left_down             Control 0+ + +16=16 
+    (20, 'M') : (LEFT, MOUSE_DOWN, SHIFT_CONTROL),            # left_down   Shift     Control 0+4+ +16=20 
+    (24, 'M') : (LEFT, MOUSE_DOWN, ALT_CONTROL),              # left_down         Alt Control 0+ +8+16=24 
+    (28, 'M') : (LEFT, MOUSE_DOWN, SHIFT_ALT_CONTROL),        # left_down   Shift Alt Control 0+4+8+16=28 
+ 
+    ( 1, 'M') : (MIDDLE, MOUSE_DOWN, NO_MODIFIER),            # middle_down                   1+ + +  =1 
+    ( 5, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT),                  # middle_down Shift             1+4+ +  =5 
+    ( 9, 'M') : (MIDDLE, MOUSE_DOWN, ALT),                    # middle_down       Alt         1+ +8+  =9 
+    (13, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_ALT),              # middle_down Shift Alt         1+4+8+  =13 
+    (17, 'M') : (MIDDLE, MOUSE_DOWN, CONTROL),                # middle_down           Control 1+ + +16=17 
+    (21, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_CONTROL),          # middle_down Shift     Control 1+4+ +16=21 
+    (25, 'M') : (MIDDLE, MOUSE_DOWN, ALT_CONTROL),            # middle_down       Alt Control 1+ +8+16=25 
+    (29, 'M') : (MIDDLE, MOUSE_DOWN, SHIFT_ALT_CONTROL),      # middle_down Shift Alt Control 1+4+8+16=29 
+ 
+    ( 2, 'M') : (RIGHT, MOUSE_DOWN, NO_MODIFIER),             # right_down                    2+ + +  =2 
+    ( 6, 'M') : (RIGHT, MOUSE_DOWN, SHIFT),                   # right_down  Shift             2+4+ +  =6 
+    (10, 'M') : (RIGHT, MOUSE_DOWN, ALT),                     # right_down        Alt         2+ +8+  =10 
+    (14, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_ALT),               # right_down  Shift Alt         2+4+8+  =14 
+    (18, 'M') : (RIGHT, MOUSE_DOWN, CONTROL),                 # right_down            Control 2+ + +16=18 
+    (22, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_CONTROL),           # right_down  Shift     Control 2+4+ +16=22 
+    (26, 'M') : (RIGHT, MOUSE_DOWN, ALT_CONTROL),             # right_down        Alt Control 2+ +8+16=26 
+    (30, 'M') : (RIGHT, MOUSE_DOWN, SHIFT_ALT_CONTROL),       # right_down  Shift Alt Control 2+4+8+16=30 
+ 
+    (32, 'M') : (LEFT, MOUSE_MOVE, NO_MODIFIER),              # left_drag                     32+ + +  =32 
+    (36, 'M') : (LEFT, MOUSE_MOVE, SHIFT),                    # left_drag   Shift             32+4+ +  =36 
+    (40, 'M') : (LEFT, MOUSE_MOVE, ALT),                      # left_drag         Alt         32+ +8+  =40 
+    (44, 'M') : (LEFT, MOUSE_MOVE, SHIFT_ALT),                # left_drag   Shift Alt         32+4+8+  =44 
+    (48, 'M') : (LEFT, MOUSE_MOVE, CONTROL),                  # left_drag             Control 32+ + +16=48 
+    (52, 'M') : (LEFT, MOUSE_MOVE, SHIFT_CONTROL),            # left_drag   Shift     Control 32+4+ +16=52 
+    (56, 'M') : (LEFT, MOUSE_MOVE, ALT_CONTROL),              # left_drag         Alt Control 32+ +8+16=56 
+    (60, 'M') : (LEFT, MOUSE_MOVE, SHIFT_ALT_CONTROL),        # left_drag   Shift Alt Control 32+4+8+16=60 
+ 
+    (33, 'M') : (MIDDLE, MOUSE_MOVE, NO_MODIFIER),            # middle_drag                   33+ + +  =33 
+    (37, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT),                  # middle_drag Shift             33+4+ +  =37 
+    (41, 'M') : (MIDDLE, MOUSE_MOVE, ALT),                    # middle_drag       Alt         33+ +8+  =41 
+    (45, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_ALT),              # middle_drag Shift Alt         33+4+8+  =45 
+    (49, 'M') : (MIDDLE, MOUSE_MOVE, CONTROL),                # middle_drag           Control 33+ + +16=49 
+    (53, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_CONTROL),          # middle_drag Shift     Control 33+4+ +16=53 
+    (57, 'M') : (MIDDLE, MOUSE_MOVE, ALT_CONTROL),            # middle_drag       Alt Control 33+ +8+16=57 
+    (61, 'M') : (MIDDLE, MOUSE_MOVE, SHIFT_ALT_CONTROL),      # middle_drag Shift Alt Control 33+4+8+16=61 
+ 
+    (34, 'M') : (RIGHT, MOUSE_MOVE, NO_MODIFIER),             # right_drag                    34+ + +  =34 
+    (38, 'M') : (RIGHT, MOUSE_MOVE, SHIFT),                   # right_drag  Shift             34+4+ +  =38 
+    (42, 'M') : (RIGHT, MOUSE_MOVE, ALT),                     # right_drag        Alt         34+ +8+  =42 
+    (46, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_ALT),               # right_drag  Shift Alt         34+4+8+  =46 
+    (50, 'M') : (RIGHT, MOUSE_MOVE, CONTROL),                 # right_drag            Control 34+ + +16=50 
+    (54, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_CONTROL),           # right_drag  Shift     Control 34+4+ +16=54 
+    (58, 'M') : (RIGHT, MOUSE_MOVE, ALT_CONTROL),             # right_drag        Alt Control 34+ +8+16=58 
+    (62, 'M') : (RIGHT, MOUSE_MOVE, SHIFT_ALT_CONTROL),       # right_drag  Shift Alt Control 34+4+8+16=62 
+ 
+    (35, 'M') : (NO_BUTTON, MOUSE_MOVE, NO_MODIFIER),         # none_drag                     35+ + +  =35 
+    (39, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT),               # none_drag   Shift             35+4+ +  =39 
+    (43, 'M') : (NO_BUTTON, MOUSE_MOVE, ALT),                 # none_drag         Alt         35+ +8+  =43 
+    (47, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_ALT),           # none_drag   Shift Alt         35+4+8+  =47 
+    (51, 'M') : (NO_BUTTON, MOUSE_MOVE, CONTROL),             # none_drag             Control 35+ + +16=51 
+    (55, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_CONTROL),       # none_drag   Shift     Control 35+4+ +16=55 
+    (59, 'M') : (NO_BUTTON, MOUSE_MOVE, ALT_CONTROL),         # none_drag         Alt Control 35+ +8+16=59 
+    (63, 'M') : (NO_BUTTON, MOUSE_MOVE, SHIFT_ALT_CONTROL),   # none_drag   Shift Alt Control 35+4+8+16=63 
+ 
+    (64, 'M') : (NO_BUTTON, SCROLL_UP, NO_MODIFIER),          # scroll_up                     64+ + +  =64 
+    (68, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT),                # scroll_up   Shift             64+4+ +  =68 
+    (72, 'M') : (NO_BUTTON, SCROLL_UP, ALT),                  # scroll_up         Alt         64+ +8+  =72 
+    (76, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_ALT),            # scroll_up   Shift Alt         64+4+8+  =76 
+    (80, 'M') : (NO_BUTTON, SCROLL_UP, CONTROL),              # scroll_up             Control 64+ + +16=80 
+    (84, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_CONTROL),        # scroll_up   Shift     Control 64+4+ +16=84 
+    (88, 'M') : (NO_BUTTON, SCROLL_UP, ALT_CONTROL),          # scroll_up         Alt Control 64+ +8+16=88 
+    (92, 'M') : (NO_BUTTON, SCROLL_UP, SHIFT_ALT_CONTROL),    # scroll_up   Shift Alt Control 64+4+8+16=92 
+ 
+    (65, 'M') : (NO_BUTTON, SCROLL_DOWN, NO_MODIFIER),        # scroll_down                   64+ + +  =65 
+    (69, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT),              # scroll_down Shift             64+4+ +  =69 
+    (73, 'M') : (NO_BUTTON, SCROLL_DOWN, ALT),                # scroll_down       Alt         64+ +8+  =73 
+    (77, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_ALT),          # scroll_down Shift Alt         64+4+8+  =77 
+    (81, 'M') : (NO_BUTTON, SCROLL_DOWN, CONTROL),            # scroll_down           Control 64+ + +16=81 
+    (85, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_CONTROL),      # scroll_down Shift     Control 64+4+ +16=85 
+    (89, 'M') : (NO_BUTTON, SCROLL_DOWN, ALT_CONTROL),        # scroll_down       Alt Control 64+ +8+16=89 
+    (93, 'M') : (NO_BUTTON, SCROLL_DOWN, SHIFT_ALT_CONTROL),  # scroll_down Shift Alt Control 64+4+8+16=93 
+} 
+ 
+typical_mouse_events = { 
+    32: (LEFT           , MOUSE_DOWN , UNKNOWN_MODIFIER), 
+    33: (MIDDLE         , MOUSE_DOWN , UNKNOWN_MODIFIER), 
+    34: (RIGHT          , MOUSE_DOWN , UNKNOWN_MODIFIER), 
+    35: (UNKNOWN_BUTTON , MOUSE_UP   , UNKNOWN_MODIFIER), 
+ 
+    64: (LEFT           , MOUSE_MOVE , UNKNOWN_MODIFIER), 
+    65: (MIDDLE         , MOUSE_MOVE , UNKNOWN_MODIFIER), 
+    66: (RIGHT          , MOUSE_MOVE , UNKNOWN_MODIFIER), 
+    67: (NO_BUTTON      , MOUSE_MOVE , UNKNOWN_MODIFIER), 
+ 
+    96: (NO_BUTTON      , SCROLL_UP  , UNKNOWN_MODIFIER), 
+    97: (NO_BUTTON      , SCROLL_DOWN, UNKNOWN_MODIFIER), 
+} 
+ 
+urxvt_mouse_events={ 
+    32: (UNKNOWN_BUTTON, MOUSE_DOWN , UNKNOWN_MODIFIER), 
+    35: (UNKNOWN_BUTTON, MOUSE_UP   , UNKNOWN_MODIFIER), 
+    96: (NO_BUTTON     , SCROLL_UP  , UNKNOWN_MODIFIER), 
+    97: (NO_BUTTON     , SCROLL_DOWN, UNKNOWN_MODIFIER), 
+} 
+# fmt:on 
+ 
+ 
+def load_mouse_bindings() -> KeyBindings: 
+    """ 
+    Key bindings, required for mouse support. 
+    (Mouse events enter through the key binding system.) 
+    """ 
+    key_bindings = KeyBindings() 
+ 
+    @key_bindings.add(Keys.Vt100MouseEvent) 
+    def _(event: E) -> "NotImplementedOrNone": 
+        """ 
+        Handling of incoming mouse event. 
+        """ 
+        # TypicaL:   "eSC[MaB*" 
+        # Urxvt:     "Esc[96;14;13M" 
+        # Xterm SGR: "Esc[<64;85;12M" 
+ 
+        # Parse incoming packet. 
+        if event.data[2] == "M": 
+            # Typical. 
+            mouse_event, x, y = map(ord, event.data[3:]) 
+ 
+            # TODO: Is it possible to add modifiers here? 
+            mouse_button, mouse_event_type, mouse_modifier = typical_mouse_events[ 
+                mouse_event 
+            ] 
+ 
+            # Handle situations where `PosixStdinReader` used surrogateescapes. 
+            if x >= 0xDC00: 
+                x -= 0xDC00 
+            if y >= 0xDC00: 
+                y -= 0xDC00 
+ 
+            x -= 32 
+            y -= 32 
+        else: 
+            # Urxvt and Xterm SGR. 
+            # When the '<' is not present, we are not using the Xterm SGR mode, 
+            # but Urxvt instead. 
+            data = event.data[2:] 
+            if data[:1] == "<": 
+                sgr = True 
+                data = data[1:] 
+            else: 
+                sgr = False 
+ 
+            # Extract coordinates. 
+            mouse_event, x, y = map(int, data[:-1].split(";")) 
+            m = data[-1] 
+ 
+            # Parse event type. 
+            if sgr: 
+                try: 
+                    ( 
+                        mouse_button, 
+                        mouse_event_type, 
+                        mouse_modifiers, 
+                    ) = xterm_sgr_mouse_events[mouse_event, m] 
+                except KeyError: 
+                    return NotImplemented 
+ 
+            else: 
+                # Some other terminals, like urxvt, Hyper terminal, ... 
+                ( 
+                    mouse_button, 
+                    mouse_event_type, 
+                    mouse_modifiers, 
+                ) = urxvt_mouse_events.get( 
+                    mouse_event, (UNKNOWN_BUTTON, MOUSE_MOVE, UNKNOWN_MODIFIER) 
+                ) 
+ 
+        x -= 1 
+        y -= 1 
+ 
+        # Only handle mouse events when we know the window height. 
+        if event.app.renderer.height_is_known and mouse_event_type is not None: 
+            # Take region above the layout into account. The reported 
+            # coordinates are absolute to the visible part of the terminal. 
+            from prompt_toolkit.renderer import HeightIsUnknownError 
+ 
+            try: 
+                y -= event.app.renderer.rows_above_layout 
+            except HeightIsUnknownError: 
+                return NotImplemented 
+ 
+            # Call the mouse handler from the renderer. 
+ 
+            # Note: This can return `NotImplemented` if no mouse handler was 
+            #       found for this position, or if no repainting needs to 
+            #       happen. this way, we avoid excessive repaints during mouse 
+            #       movements. 
+            handler = event.app.renderer.mouse_handlers.mouse_handlers[y][x] 
+            return handler( 
+                MouseEvent( 
+                    position=Point(x=x, y=y), 
+                    event_type=mouse_event_type, 
+                    button=mouse_button, 
+                    modifiers=mouse_modifiers, 
+                ) 
+            ) 
+ 
+        return NotImplemented 
+ 
+    @key_bindings.add(Keys.ScrollUp) 
+    def _scroll_up(event: E) -> None: 
+        """ 
+        Scroll up event without cursor position. 
+        """ 
+        # We don't receive a cursor position, so we don't know which window to 
+        # scroll. Just send an 'up' key press instead. 
+        event.key_processor.feed(KeyPress(Keys.Up), first=True) 
+ 
+    @key_bindings.add(Keys.ScrollDown) 
+    def _scroll_down(event: E) -> None: 
+        """ 
+        Scroll down event without cursor position. 
+        """ 
+        event.key_processor.feed(KeyPress(Keys.Down), first=True) 
+ 
+    @key_bindings.add(Keys.WindowsMouseEvent) 
+    def _mouse(event: E) -> "NotImplementedOrNone": 
+        """ 
+        Handling of mouse events for Windows. 
+        """ 
+        assert is_windows()  # This key binding should only exist for Windows. 
+ 
+        # Parse data. 
+        pieces = event.data.split(";") 
+ 
+        button = MouseButton(pieces[0]) 
+        event_type = MouseEventType(pieces[1]) 
+        x = int(pieces[2]) 
+        y = int(pieces[3]) 
+ 
+        # Make coordinates absolute to the visible part of the terminal. 
+        output = event.app.renderer.output 
+ 
+        from prompt_toolkit.output.win32 import Win32Output 
+        from prompt_toolkit.output.windows10 import Windows10_Output 
+ 
+        if isinstance(output, (Win32Output, Windows10_Output)): 
+            screen_buffer_info = output.get_win32_screen_buffer_info() 
+            rows_above_cursor = ( 
+                screen_buffer_info.dwCursorPosition.Y - event.app.renderer._cursor_pos.y 
+            ) 
+            y -= rows_above_cursor 
+ 
+            # Call the mouse event handler. 
+            # (Can return `NotImplemented`.) 
+            handler = event.app.renderer.mouse_handlers.mouse_handlers[y][x] 
+ 
+            return handler( 
+                MouseEvent( 
+                    position=Point(x=x, y=y), 
+                    event_type=event_type, 
+                    button=button, 
+                    modifiers=UNKNOWN_MODIFIER, 
+                ) 
+            ) 
+ 
+        # No mouse handler found. Return `NotImplemented` so that we don't 
+        # invalidate the UI. 
+        return NotImplemented 
+ 
+    return key_bindings