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from __future__ import annotations

import sys
from typing import TYPE_CHECKING

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 ..key_bindings import KeyBindings

if TYPE_CHECKING:
    from prompt_toolkit.key_binding.key_bindings import NotImplementedOrNone

__all__ = [
    "load_mouse_bindings",
]

E = KeyPressEvent

# fmt: off
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_modifiers = 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.
        """
        # This key binding should only exist for Windows.
        if sys.platform == "win32":
            # 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 __future__ import annotations

	import sys
	from typing import TYPE_CHECKING

	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 ..key_bindings import KeyBindings

	if TYPE_CHECKING:
	from prompt_toolkit.key_binding.key_bindings import NotImplementedOrNone

	__all__ = [
	"load_mouse_bindings",
	]

	E = KeyPressEvent

	# fmt: off
	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_modifiers = 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.
	"""
	# This key binding should only exist for Windows.
	if sys.platform == "win32":
	# 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