Intermediate changes

commit_hash:714a2397bc9bba58d04cc4be156fac88e0774e56

11 files changed, 375 insertions, 92 deletions

diff --git a/contrib/python/textual/.dist-info/METADATA b/contrib/python/textual/.dist-info/METADATA
index 381a4fceb5c..f3bb97ae79a 100644
--- a/contrib/python/textual/.dist-info/METADATA
+++ b/contrib/python/textual/.dist-info/METADATA
@@ -1,6 +1,6 @@
 Metadata-Version: 2.4
 Name: textual
-Version: 8.2.6
+Version: 8.2.7
 Summary: Modern Text User Interface framework
 License: MIT
 License-File: LICENSE
diff --git a/contrib/python/textual/textual/_keyboard_protocol.py b/contrib/python/textual/textual/_keyboard_protocol.py
index 9b765411026..e35b419e129 100644
--- a/contrib/python/textual/textual/_keyboard_protocol.py
+++ b/contrib/python/textual/textual/_keyboard_protocol.py
@@ -1,5 +1,7 @@
+from typing import Final
+
 # https://sw.kovidgoyal.net/kitty/keyboard-protocol/#functional-key-definitions
-FUNCTIONAL_KEYS = {
+FUNCTIONAL_KEYS: Final = {
     "27u": "escape",
     "13u": "enter",
     "9u": "tab",
@@ -121,3 +123,21 @@ FUNCTIONAL_KEYS = {
     "57453u": "iso_level3_shift",
     "57454u": "iso_level5_shift",
 }
+
+# A sub-set of modifier keys
+MODIFIER_FUNCTIONAL_KEYS: Final = {
+    "left_shift",
+    "left_control",
+    "left_alt",
+    "left_super",
+    "left_hyper",
+    "left_meta",
+    "right_shift",
+    "right_control",
+    "right_alt",
+    "right_super",
+    "right_hyper",
+    "right_meta",
+    "iso_level3_shift",
+    "iso_level5_shift",
+}
diff --git a/contrib/python/textual/textual/_styles_cache.py b/contrib/python/textual/textual/_styles_cache.py
index 38d145cde1d..7e9d32a0b4a 100644
--- a/contrib/python/textual/textual/_styles_cache.py
+++ b/contrib/python/textual/textual/_styles_cache.py
@@ -112,6 +112,7 @@ class StylesCache:
 
         base_background, background = widget.background_colors
         styles = widget.styles
+        app = widget.app
         strips = self.render(
             styles,
             widget.region.size,
@@ -139,7 +140,8 @@ class StylesCache:
             padding=styles.padding,
             crop=crop,
             opacity=widget.opacity,
-            ansi_theme=widget.app.ansi_theme,
+            ansi_theme=app.ansi_theme,
+            native_ansi=app.native_ansi_color,
         )
 
         if widget.auto_links:
@@ -173,6 +175,7 @@ class StylesCache:
         crop: Region | None = None,
         opacity: float = 1.0,
         ansi_theme: TerminalTheme = DEFAULT_TERMINAL_THEME,
+        native_ansi: bool = False,
     ) -> list[Strip]:
         """Render a widget content plus CSS styles.
 
@@ -191,6 +194,7 @@ class StylesCache:
             filters: Additional post-processing for the segments.
             opacity: Widget opacity.
             ansi_theme: Theme for ANSI colors.
+            native_ansi: Use native ANSI colors?
 
         Returns:
             Rendered lines.
@@ -227,6 +231,7 @@ class StylesCache:
                     border_subtitle,
                     opacity,
                     ansi_theme,
+                    native_ansi,
                 )
                 self._cache[y] = strip
             else:
@@ -273,6 +278,7 @@ class StylesCache:
         border_subtitle: tuple[Content, Color, Color, Style] | None,
         opacity: float,
         ansi_theme: TerminalTheme,
+        native_ansi: bool,
     ) -> Strip:
         """Render a styled line.
 
@@ -289,6 +295,8 @@ class StylesCache:
             border_title: Optional tuple of (title, color, background, style).
             border_subtitle: Optional tuple of (subtitle, color, background, style).
             opacity: Opacity of line.
+            ansi_theme: ANSI theme.
+            native_ansi: Use native ANSI colors?
 
         Returns:
             A line of segments.
@@ -450,7 +458,9 @@ class StylesCache:
                 line = Strip.blank(content_width, inner.rich_style)
 
             if (text_opacity := styles.text_opacity) != 1.0:
-                line = TextOpacity.process_segments(line, text_opacity, ansi_theme)
+                line = TextOpacity.process_segments(
+                    line, text_opacity, ansi_theme, native_ansi
+                )
             if pad_left or pad_right:
                 line = line_post(line_pad(line, pad_left, pad_right, inner.rich_style))
             else:
diff --git a/contrib/python/textual/textual/_xterm_parser.py b/contrib/python/textual/textual/_xterm_parser.py
index 1b7f3e57d9a..eafa7414ecb 100644
--- a/contrib/python/textual/textual/_xterm_parser.py
+++ b/contrib/python/textual/textual/_xterm_parser.py
@@ -2,13 +2,14 @@ from __future__ import annotations
 
 import os
 import re
+from functools import lru_cache
 from typing import Any, Generator, Iterable
 
 from typing_extensions import Final
 
 from textual import constants, events, messages
 from textual._ansi_sequences import ANSI_SEQUENCES_KEYS, IGNORE_SEQUENCE
-from textual._keyboard_protocol import FUNCTIONAL_KEYS
+from textual._keyboard_protocol import FUNCTIONAL_KEYS, MODIFIER_FUNCTIONAL_KEYS
 from textual._parser import ParseEOF, Parser, ParseTimeout, Peek1, Read1, TokenCallback
 from textual.keys import KEY_NAME_REPLACEMENTS, Keys, _character_to_key
 from textual.message import Message
@@ -37,8 +38,10 @@ FOCUSOUT: Final[str] = "\x1b[O"
 SPECIAL_SEQUENCES = {BRACKETED_PASTE_START, BRACKETED_PASTE_END, FOCUSIN, FOCUSOUT}
 """Set of special sequences."""
 
-_re_extended_key: Final = re.compile(r"\x1b\[(?:(\d+)(?:;(\d+))?)?([u~ABCDEFHPQRS])")
-_re_in_band_window_resize: Final = re.compile(
+_re_extended_key: Final[re.Pattern[str]] = re.compile(
+    r"\x1b\[((?:\d*;?){2,3})([u~ABCDEFHPQRS])"
+)
+_re_in_band_window_resize: Final[re.Pattern[str]] = re.compile(
     r"\x1b\[48;(\d+(?:\:.*?)?);(\d+(?:\:.*?)?);(\d+(?:\:.*?)?);(\d+(?:\:.*?)?)t"
 )
 
@@ -48,6 +51,13 @@ IS_ITERM = (
     or os.environ.get("TERM_PROGRAM", "") == "iTerm.app"
 )
 
+SPECIAL_KEY_TO_CHARACTER: Final = {
+    "backspace": "\x7f",
+    "enter": "\r",
+    "tab": "\t",
+}
+"""Explcit characters for keys, used in Kitty protocol parsing"""
+
 
 class XTermParser(Parser[Message]):
     _re_sgr_mouse = re.compile(r"\x1b\[<(\d+);(-?\d+);(-?\d+)([Mm])")
@@ -324,6 +334,53 @@ class XTermParser(Parser[Message]):
             self._debug_log_file.close()
             self._debug_log_file = None
 
+    @lru_cache(maxsize=1024)
+    def _parse_extended_key(self, sequence: str) -> events.Key | None:
+        """Parse a Kitty sequence.
+
+        Args:
+            sequence: Input sequence
+
+        Returns:
+            Key event, or `None` of none could be parsed.
+        """
+
+        if (match := _re_extended_key.fullmatch(sequence)) is None:
+            return None
+
+        codes, end = match.groups(default="")
+        codepoint_str, modifiers_str, text_str, *_ = codes.split(";") + ["", "", ""]
+
+        codepoint = int(codepoint_str or "1")
+        modifiers = int(modifiers_str or "0")
+        text = chr(int(text_str)) if text_str else None
+
+        if not (key := FUNCTIONAL_KEYS.get(f"{codepoint}{end}", "")):
+            key = _character_to_key(text if text else chr(codepoint))
+
+        key_tokens: list[str] = []
+        # The modifier is redundant on a modifier key
+        if modifiers and key not in MODIFIER_FUNCTIONAL_KEYS and text_str is not None:
+            modifier_bits = int(modifiers) - 1
+            # Not convinced of the utility in reporting caps_lock and num_lock
+            MODIFIERS = ("alt", "ctrl", "super", "hyper", "meta")
+            # Ignore caps_lock and num_lock modifiers
+            if modifier_bits & 1 and (text is None or text.isspace()):
+                key_tokens.append("shift")
+            for bit, modifier in enumerate(MODIFIERS, 1):
+                if modifier == "alt" and text is not None:
+                    continue
+                if modifier_bits & (1 << bit):
+                    key_tokens.append(modifier)
+
+        key_tokens.sort()
+        if key is not None:
+            key_tokens.append(key)
+        return events.Key(
+            "+".join(key_tokens),
+            text or (None if modifiers else SPECIAL_KEY_TO_CHARACTER.get(key, None)),
+        )
+
     def _sequence_to_key_events(
         self, sequence: str, alt: bool = False
     ) -> Iterable[events.Key]:
@@ -333,32 +390,14 @@ class XTermParser(Parser[Message]):
             sequence: Sequence of code points.
 
         Returns:
-            Keys
+            Iterable of key events.
         """
 
-        if (match := _re_extended_key.fullmatch(sequence)) is not None:
-            number, modifiers, end = match.groups()
-            number = number or 1
-            if not (key := FUNCTIONAL_KEYS.get(f"{number}{end}", "")):
-                try:
-                    key = _character_to_key(chr(int(number)))
-                except Exception:
-                    key = chr(int(number))
-            key_tokens: list[str] = []
-            if modifiers:
-                modifier_bits = int(modifiers) - 1
-                # Not convinced of the utility in reporting caps_lock and num_lock
-                MODIFIERS = ("shift", "alt", "ctrl", "super", "hyper", "meta")
-                # Ignore caps_lock and num_lock modifiers
-                for bit, modifier in enumerate(MODIFIERS):
-                    if modifier_bits & (1 << bit):
-                        key_tokens.append(modifier)
-
-            key_tokens.sort()
-            key_tokens.append(key.lower())
-            yield events.Key(
-                "+".join(key_tokens), sequence if len(sequence) == 1 else None
-            )
+        if (
+            not constants.DISABLE_KITTY_KEY
+            and (key := self._parse_extended_key(sequence)) is not None
+        ):
+            yield key.copy()
             return
 
         keys = ANSI_SEQUENCES_KEYS.get(sequence)
@@ -383,6 +422,7 @@ class XTermParser(Parser[Message]):
             sequence = keys
         # If the sequence is a single character, attempt to process it as a
         # key.
+
         if len(sequence) == 1:
             try:
                 if not sequence.isalnum():
diff --git a/contrib/python/textual/textual/constants.py b/contrib/python/textual/textual/constants.py
index feedbea6e96..a2702db11a6 100644
--- a/contrib/python/textual/textual/constants.py
+++ b/contrib/python/textual/textual/constants.py
@@ -113,6 +113,9 @@ DEBUG: Final[bool] = _get_environ_bool("TEXTUAL_DEBUG")
 DRIVER: Final[str | None] = get_environ("TEXTUAL_DRIVER", None)
 """Import for replacement driver."""
 
+DISABLE_KITTY_KEY: Final[bool] = _get_environ_bool("TEXTUAL_DISABLE_KITTY_KEY")
+"""Disable kitty key protocol."""
+
 FILTERS: Final[str] = get_environ("TEXTUAL_FILTERS", "")
 """A list of filters to apply to renderables."""
 
diff --git a/contrib/python/textual/textual/drivers/linux_driver.py b/contrib/python/textual/textual/drivers/linux_driver.py
index 98bf632ff70..74ed4631879 100644
--- a/contrib/python/textual/textual/drivers/linux_driver.py
+++ b/contrib/python/textual/textual/drivers/linux_driver.py
@@ -9,11 +9,11 @@ import termios
 import tty
 from codecs import getincrementaldecoder
 from threading import Event, Thread
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, Final
 
 import rich.repr
 
-from textual import events
+from textual import constants, events
 from textual._loop import loop_last
 from textual._parser import ParseError
 from textual._xterm_parser import XTermParser
@@ -26,6 +26,13 @@ from textual.messages import InBandWindowResize
 if TYPE_CHECKING:
     from textual.app import App
 
+# https://sw.kovidgoyal.net/kitty/keyboard-protocol/#progressive-enhancement
+KITTY_DISAMBIGUATE_ESCAPE_CODES: Final = 0b00000001
+KITTY_REPORT_EVENT_TYPES: Final = 0b00000010
+KITTY_REPORT_ALTERNATE_KEYS: Final = 0b00000100
+KITTY_REPORT_ALL_KEYS: Final = 0b00001000
+KITTY_REPORT_ASSOCIATED_TEXT: Final = 0b00010000
+
 
 @rich.repr.auto(angular=True)
 class LinuxDriver(Driver):
@@ -274,7 +281,15 @@ class LinuxDriver(Driver):
 
         self.write("\x1b[?25l")  # Hide cursor
         self.write("\x1b[?1004h")  # Enable FocusIn/FocusOut.
-        self.write("\x1b[>1u")  # https://sw.kovidgoyal.net/kitty/keyboard-protocol/
+
+        if not constants.DISABLE_KITTY_KEY:
+            # https://sw.kovidgoyal.net/kitty/keyboard-protocol/
+            KITTY_PROTOCOL_FLAG = (
+                KITTY_DISAMBIGUATE_ESCAPE_CODES
+                | KITTY_REPORT_ALL_KEYS
+                | KITTY_REPORT_ASSOCIATED_TEXT
+            )
+            self.write(f"\x1b[>{KITTY_PROTOCOL_FLAG}u")
 
         self.flush()
         self._key_thread = Thread(target=self._run_input_thread, name="textual-input")
diff --git a/contrib/python/textual/textual/events.py b/contrib/python/textual/textual/events.py
index 92e05a91a1a..d3847f4ad49 100644
--- a/contrib/python/textual/textual/events.py
+++ b/contrib/python/textual/textual/events.py
@@ -269,7 +269,7 @@ class Key(InputEvent):
         character: A printable character or `None` if it is not printable.
     """
 
-    __slots__ = ["key", "character", "aliases"]
+    __slots__ = ["key", "character"]
 
     def __init__(self, key: str, character: str | None) -> None:
         super().__init__()
@@ -279,8 +279,6 @@ class Key(InputEvent):
             (key if len(key) == 1 else None) if character is None else character
         )
         """A printable character or ``None`` if it is not printable."""
-        self.aliases: list[str] = _get_key_aliases(key)
-        """The aliases for the key, including the key itself."""
 
     def __rich_repr__(self) -> rich.repr.Result:
         yield "key", self.key
@@ -289,6 +287,10 @@ class Key(InputEvent):
         yield "is_printable", self.is_printable
         yield "aliases", self.aliases, [self.key]
 
+    def copy(self) -> Key:
+        """Get a copy of this key event."""
+        return Key(self.key, self.character)
+
     @property
     def name(self) -> str:
         """Name of a key suitable for use as a Python identifier."""
@@ -308,6 +310,11 @@ class Key(InputEvent):
         """
         return False if self.character is None else self.character.isprintable()
 
+    @property
+    def aliases(self) -> list[str]:
+        """The aliases for the key, including the key itself."""
+        return _get_key_aliases(self.key)
+
 
 def _key_to_identifier(key: str) -> str:
     """Convert the key string to a name suitable for use as a Python identifier."""
diff --git a/contrib/python/textual/textual/renderables/text_opacity.py b/contrib/python/textual/textual/renderables/text_opacity.py
index 7ba41e36d13..b1ed31a49fa 100644
--- a/contrib/python/textual/textual/renderables/text_opacity.py
+++ b/contrib/python/textual/textual/renderables/text_opacity.py
@@ -56,6 +56,7 @@ class TextOpacity:
         segments: Iterable[Segment],
         opacity: float,
         ansi_theme: TerminalTheme,
+        native_ansi: bool = False,
     ) -> Iterable[Segment]:
         """Apply opacity to segments.
 
@@ -64,6 +65,7 @@ class TextOpacity:
             opacity: Opacity to apply.
             ansi_theme: Terminal theme.
             background: Color of background.
+            native_ansi: Allow ANSI colors.
 
         Returns:
             Segments with applied opacity.
@@ -82,21 +84,67 @@ class TextOpacity:
         elif opacity == 1:
             yield from segments
         else:
-            filter = ANSIToTruecolor(ansi_theme)
-            for segment in filter.apply(list(segments), TRANSPARENT):
-                # use Tuple rather than tuple so Python 3.7 doesn't complain
-                text, style, control = cast(Tuple[str, Style, object], segment)
-                if not style:
-                    yield segment
-                    continue
+            if native_ansi:
+                # Special case for native ANSI
+                # Without RGB we can't accurately calculate the foreground color
+                DIM = Style(dim=True)
+                filter = ANSIToTruecolor(ansi_theme)
+                segments_ = list(segments)
+                for original_segment, segment in zip(
+                    segments_, filter.apply(segments_, TRANSPARENT)
+                ):
+                    if original_segment.style is not None:
+                        text, style, control = original_segment
+                        if (
+                            style is not None
+                            and style.bgcolor is not None
+                            and style.bgcolor.is_default
+                        ):
+                            # If the opacity is less than or equal to 50%, then set the dim attribute
+                            if style.color is not None and opacity <= 0.5:
+                                yield Segment(text, style + DIM, control)
+                            else:
+                                yield original_segment
+                            continue
+                    # use Tuple rather than tuple so Python 3.7 doesn't complain
+                    text, style, control = segment
+                    if not style:
+                        yield segment
+                        continue
+
+                    color = style.color
+                    bgcolor = style.bgcolor
+                    if (
+                        color is not None
+                        and color.triplet
+                        and bgcolor
+                        and bgcolor.triplet
+                    ):
+                        color_style = _get_blended_style_cached(bgcolor, color, opacity)
+                        yield _Segment(text, style + color_style)
+                    else:
+                        yield segment
+            else:
+                filter = ANSIToTruecolor(ansi_theme)
+                for segment in filter.apply(list(segments), TRANSPARENT):
+                    # use Tuple rather than tuple so Python 3.7 doesn't complain
+                    text, style, control = segment
+                    if not style:
+                        yield segment
+                        continue
 
-                color = style.color
-                bgcolor = style.bgcolor
-                if color and color.triplet and bgcolor and bgcolor.triplet:
-                    color_style = _get_blended_style_cached(bgcolor, color, opacity)
-                    yield _Segment(text, style + color_style)
-                else:
-                    yield segment
+                    color = style.color
+                    bgcolor = style.bgcolor
+                    if (
+                        color is not None
+                        and color.triplet
+                        and bgcolor
+                        and bgcolor.triplet
+                    ):
+                        color_style = _get_blended_style_cached(bgcolor, color, opacity)
+                        yield _Segment(text, style + color_style)
+                    else:
+                        yield segment
 
     def __rich_console__(
         self, console: Console, options: ConsoleOptions
diff --git a/contrib/python/textual/textual/widgets/_input.py b/contrib/python/textual/textual/widgets/_input.py
index 77b77906cbc..3aa2a945bdb 100644
--- a/contrib/python/textual/textual/widgets/_input.py
+++ b/contrib/python/textual/textual/widgets/_input.py
@@ -124,7 +124,10 @@ class Input(ScrollView):
         ),
         Binding("ctrl+u", "delete_left_all", "Delete all to the left", show=False),
         Binding(
-            "ctrl+f", "delete_right_word", "Delete right to start of word", show=False
+            "ctrl+backspace",
+            "delete_right_word",
+            "Delete right to start of word",
+            show=False,
         ),
         Binding("ctrl+k", "delete_right_all", "Delete all to the right", show=False),
         Binding("ctrl+x", "cut", "Cut selected text", show=False),
diff --git a/contrib/python/textual/textual/widgets/_text_area.py b/contrib/python/textual/textual/widgets/_text_area.py
index 87a0bb10ee4..d970a31c5a7 100644
--- a/contrib/python/textual/textual/widgets/_text_area.py
+++ b/contrib/python/textual/textual/widgets/_text_area.py
@@ -102,7 +102,7 @@ class TextAreaLanguage:
     name: str
     """The name of the language"""
 
-    language: "Language" | None
+    language: "Language | None"
     """The tree-sitter language object if that has been overridden, or None if it is a built-in language."""
 
     highlight_query: str
@@ -223,16 +223,66 @@ TextArea {
 
     BINDINGS = [
         # Cursor movement
-        Binding("up", "cursor_up", "Cursor up", show=False),
-        Binding("down", "cursor_down", "Cursor down", show=False),
-        Binding("left", "cursor_left", "Cursor left", show=False),
-        Binding("right", "cursor_right", "Cursor right", show=False),
-        Binding("ctrl+left", "cursor_word_left", "Cursor word left", show=False),
-        Binding("ctrl+right", "cursor_word_right", "Cursor word right", show=False),
-        Binding("home,ctrl+a", "cursor_line_start", "Cursor line start", show=False),
-        Binding("end,ctrl+e", "cursor_line_end", "Cursor line end", show=False),
-        Binding("pageup", "cursor_page_up", "Cursor page up", show=False),
-        Binding("pagedown", "cursor_page_down", "Cursor page down", show=False),
+        Binding(
+            "up",
+            "cursor_up",
+            "Cursor up",
+            show=False,
+        ),
+        Binding(
+            "down",
+            "cursor_down",
+            "Cursor down",
+            show=False,
+        ),
+        Binding(
+            "left",
+            "cursor_left",
+            "Cursor left",
+            show=False,
+        ),
+        Binding(
+            "right",
+            "cursor_right",
+            "Cursor right",
+            show=False,
+        ),
+        Binding(
+            "ctrl+left",
+            "cursor_word_left",
+            "Cursor word left",
+            show=False,
+        ),
+        Binding(
+            "ctrl+right",
+            "cursor_word_right",
+            "Cursor word right",
+            show=False,
+        ),
+        Binding(
+            "home,ctrl+a",
+            "cursor_line_start",
+            "Cursor line start",
+            show=False,
+        ),
+        Binding(
+            "end,ctrl+e",
+            "cursor_line_end",
+            "Cursor line end",
+            show=False,
+        ),
+        Binding(
+            "pageup",
+            "cursor_page_up",
+            "Cursor page up",
+            show=False,
+        ),
+        Binding(
+            "pagedown",
+            "cursor_page_down",
+            "Cursor page down",
+            show=False,
+        ),
         # Making selections (generally holding the shift key and moving cursor)
         Binding(
             "ctrl+shift+left",
@@ -253,30 +303,97 @@ TextArea {
             show=False,
         ),
         Binding(
-            "shift+end", "cursor_line_end(True)", "Cursor line end select", show=False
+            "shift+end",
+            "cursor_line_end(True)",
+            "Cursor line end select",
+            show=False,
+        ),
+        Binding(
+            "shift+up",
+            "cursor_up(True)",
+            "Cursor up select",
+            show=False,
+        ),
+        Binding(
+            "shift+down",
+            "cursor_down(True)",
+            "Cursor down select",
+            show=False,
+        ),
+        Binding(
+            "shift+left",
+            "cursor_left(True)",
+            "Cursor left select",
+            show=False,
+        ),
+        Binding(
+            "shift+right",
+            "cursor_right(True)",
+            "Cursor right select",
+            show=False,
         ),
-        Binding("shift+up", "cursor_up(True)", "Cursor up select", show=False),
-        Binding("shift+down", "cursor_down(True)", "Cursor down select", show=False),
-        Binding("shift+left", "cursor_left(True)", "Cursor left select", show=False),
-        Binding("shift+right", "cursor_right(True)", "Cursor right select", show=False),
         # Shortcut ways of making selections
         # Binding("f5", "select_word", "select word", show=False),
-        Binding("f6", "select_line", "Select line", show=False),
-        Binding("f7", "select_all", "Select all", show=False),
+        Binding(
+            "f6",
+            "select_line",
+            "Select line",
+            show=False,
+        ),
+        Binding(
+            "f7",
+            "select_all",
+            "Select all",
+            show=False,
+        ),
         # Deletion
-        Binding("backspace", "delete_left", "Delete character left", show=False),
         Binding(
-            "ctrl+w", "delete_word_left", "Delete left to start of word", show=False
+            "backspace",
+            "delete_left",
+            "Delete character left",
+            show=False,
+        ),
+        Binding(
+            "ctrl+w,ctrl+backspace",
+            "delete_word_left",
+            "Delete left to start of word",
+            show=False,
+        ),
+        Binding(
+            "delete,ctrl+d",
+            "delete_right",
+            "Delete character right",
+            show=False,
+        ),
+        Binding(
+            "alt+delete",
+            "delete_word_right",
+            "Delete right to start of word",
+            show=False,
+        ),
+        Binding(
+            "ctrl+x,super+x",
+            "cut",
+            "Cut",
+            show=False,
+        ),
+        Binding(
+            "ctrl+c,super+c",
+            "copy",
+            "Copy",
+            show=False,
         ),
-        Binding("delete,ctrl+d", "delete_right", "Delete character right", show=False),
         Binding(
-            "ctrl+f", "delete_word_right", "Delete right to start of word", show=False
+            "ctrl+v",
+            "paste",
+            "Paste",
+            show=False,
         ),
-        Binding("ctrl+x", "cut", "Cut", show=False),
-        Binding("ctrl+c,super+c", "copy", "Copy", show=False),
-        Binding("ctrl+v", "paste", "Paste", show=False),
         Binding(
-            "ctrl+u", "delete_to_start_of_line", "Delete to line start", show=False
+            "ctrl+u",
+            "delete_to_start_of_line",
+            "Delete to line start",
+            show=False,
         ),
         Binding(
             "ctrl+k",
@@ -290,8 +407,18 @@ TextArea {
             "Delete line",
             show=False,
         ),
-        Binding("ctrl+z", "undo", "Undo", show=False),
-        Binding("ctrl+y", "redo", "Redo", show=False),
+        Binding(
+            "ctrl+z,super+z",
+            "undo",
+            "Undo",
+            show=False,
+        ),
+        Binding(
+            "ctrl+y,super+y",
+            "redo",
+            "Redo",
+            show=False,
+        ),
     ]
     """
     | Key(s)                 | Description                                  |
@@ -315,19 +442,19 @@ TextArea {
     | shift+left             | Select while moving the cursor left.         |
     | shift+right            | Select while moving the cursor right.        |
     | backspace              | Delete character to the left of cursor.      |
-    | ctrl+w                 | Delete from cursor to start of the word.     |
+    | ctrl+w,ctrl+backspace  | Delete from cursor to start of the word.     |
     | delete,ctrl+d          | Delete character to the right of cursor.     |
-    | ctrl+f                 | Delete from cursor to end of the word.       |
+    | alt+delete             | Delete from cursor to end of the word.       |
     | ctrl+shift+k           | Delete the current line.                     |
     | ctrl+u                 | Delete from cursor to the start of the line. |
     | ctrl+k                 | Delete from cursor to the end of the line.   |
     | f6                     | Select the current line.                     |
     | f7                     | Select all text in the document.             |
-    | ctrl+z                 | Undo.                                        |
-    | ctrl+y                 | Redo.                                        |
-    | ctrl+x                 | Cut selection or line if no selection.       |
-    | ctrl+c                 | Copy selection to clipboard.                 |
-    | ctrl+v                 | Paste from clipboard.                        |
+    | ctrl+z,super+z         | Undo.                                        |
+    | ctrl+y,super+y         | Redo.                                        |
+    | ctrl+x,super+x         | Cut selection or line if no selection.       |
+    | ctrl+c,super+c         | Copy selection to clipboard.                 |
+    | ctrl+v,super+v         | Paste from clipboard.                        |
     """
 
     language: Reactive[str | None] = reactive(None, always_update=True, init=False)
@@ -2541,9 +2668,19 @@ TextArea {
 
     def action_delete_to_start_of_line(self) -> None:
         """Deletes from the cursor location to the start of the line."""
-        from_location = self.selection.end
-        to_location = self.get_cursor_line_start_location()
-        self._delete_via_keyboard(from_location, to_location)
+        if self.read_only:
+            return
+
+        if self.cursor_at_start_of_line:
+            selection = self.selection
+            start, end = selection
+            if selection.is_empty:
+                end = self.get_cursor_left_location()
+            self._delete_via_keyboard(start, end)
+        else:
+            from_location = self.selection.end
+            to_location = self.get_cursor_line_start_location()
+            self._delete_via_keyboard(from_location, to_location)
 
     def action_delete_to_end_of_line(self) -> None:
         """Deletes from the cursor location to the end of the line."""
@@ -2605,7 +2742,7 @@ TextArea {
 
         # Check the current line for a word boundary
         line = self.document[cursor_row][cursor_column:]
-        matches = list(re.finditer(self._word_pattern, line))
+        matches = list(re.finditer(r"\s*\w+", line))
 
         current_row_length = len(self.document[cursor_row])
         if matches:
diff --git a/contrib/python/textual/ya.make b/contrib/python/textual/ya.make
index a92ca7dbbc3..84a9205d17e 100644
--- a/contrib/python/textual/ya.make
+++ b/contrib/python/textual/ya.make
@@ -2,7 +2,7 @@
 
 PY3_LIBRARY()
 
-VERSION(8.2.6)
+VERSION(8.2.7)
 
 LICENSE(MIT)