mirror of https://github.com/python/cpython
801 lines
28 KiB
Python
801 lines
28 KiB
Python
# Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
|
|
# Antonio Cuni
|
|
# Armin Rigo
|
|
#
|
|
# All Rights Reserved
|
|
#
|
|
#
|
|
# Permission to use, copy, modify, and distribute this software and
|
|
# its documentation for any purpose is hereby granted without fee,
|
|
# provided that the above copyright notice appear in all copies and
|
|
# that both that copyright notice and this permission notice appear in
|
|
# supporting documentation.
|
|
#
|
|
# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
|
|
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
|
|
# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
|
|
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
|
|
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
from __future__ import annotations
|
|
|
|
import sys
|
|
|
|
from contextlib import contextmanager
|
|
from dataclasses import dataclass, field, fields
|
|
import unicodedata
|
|
from _colorize import can_colorize, ANSIColors # type: ignore[import-not-found]
|
|
|
|
|
|
from . import commands, console, input
|
|
from .utils import ANSI_ESCAPE_SEQUENCE, wlen, str_width
|
|
from .trace import trace
|
|
|
|
|
|
# types
|
|
Command = commands.Command
|
|
if False:
|
|
from .types import Callback, SimpleContextManager, KeySpec, CommandName
|
|
|
|
|
|
def disp_str(buffer: str) -> tuple[str, list[int]]:
|
|
"""disp_str(buffer:string) -> (string, [int])
|
|
|
|
Return the string that should be the printed representation of
|
|
|buffer| and a list detailing where the characters of |buffer|
|
|
get used up. E.g.:
|
|
|
|
>>> disp_str(chr(3))
|
|
('^C', [1, 0])
|
|
|
|
"""
|
|
b: list[int] = []
|
|
s: list[str] = []
|
|
for c in buffer:
|
|
if c == '\x1a':
|
|
s.append(c)
|
|
b.append(2)
|
|
elif ord(c) < 128:
|
|
s.append(c)
|
|
b.append(1)
|
|
elif unicodedata.category(c).startswith("C"):
|
|
c = r"\u%04x" % ord(c)
|
|
s.append(c)
|
|
b.extend([0] * (len(c) - 1))
|
|
else:
|
|
s.append(c)
|
|
b.append(str_width(c))
|
|
return "".join(s), b
|
|
|
|
|
|
# syntax classes:
|
|
|
|
SYNTAX_WHITESPACE, SYNTAX_WORD, SYNTAX_SYMBOL = range(3)
|
|
|
|
|
|
def make_default_syntax_table() -> dict[str, int]:
|
|
# XXX perhaps should use some unicodedata here?
|
|
st: dict[str, int] = {}
|
|
for c in map(chr, range(256)):
|
|
st[c] = SYNTAX_SYMBOL
|
|
for c in [a for a in map(chr, range(256)) if a.isalnum()]:
|
|
st[c] = SYNTAX_WORD
|
|
st["\n"] = st[" "] = SYNTAX_WHITESPACE
|
|
return st
|
|
|
|
|
|
def make_default_commands() -> dict[CommandName, type[Command]]:
|
|
result: dict[CommandName, type[Command]] = {}
|
|
for v in vars(commands).values():
|
|
if isinstance(v, type) and issubclass(v, Command) and v.__name__[0].islower():
|
|
result[v.__name__] = v
|
|
result[v.__name__.replace("_", "-")] = v
|
|
return result
|
|
|
|
|
|
default_keymap: tuple[tuple[KeySpec, CommandName], ...] = tuple(
|
|
[
|
|
(r"\C-a", "beginning-of-line"),
|
|
(r"\C-b", "left"),
|
|
(r"\C-c", "interrupt"),
|
|
(r"\C-d", "delete"),
|
|
(r"\C-e", "end-of-line"),
|
|
(r"\C-f", "right"),
|
|
(r"\C-g", "cancel"),
|
|
(r"\C-h", "backspace"),
|
|
(r"\C-j", "accept"),
|
|
(r"\<return>", "accept"),
|
|
(r"\C-k", "kill-line"),
|
|
(r"\C-l", "clear-screen"),
|
|
(r"\C-m", "accept"),
|
|
(r"\C-t", "transpose-characters"),
|
|
(r"\C-u", "unix-line-discard"),
|
|
(r"\C-w", "unix-word-rubout"),
|
|
(r"\C-x\C-u", "upcase-region"),
|
|
(r"\C-y", "yank"),
|
|
*(() if sys.platform == "win32" else ((r"\C-z", "suspend"), )),
|
|
(r"\M-b", "backward-word"),
|
|
(r"\M-c", "capitalize-word"),
|
|
(r"\M-d", "kill-word"),
|
|
(r"\M-f", "forward-word"),
|
|
(r"\M-l", "downcase-word"),
|
|
(r"\M-t", "transpose-words"),
|
|
(r"\M-u", "upcase-word"),
|
|
(r"\M-y", "yank-pop"),
|
|
(r"\M--", "digit-arg"),
|
|
(r"\M-0", "digit-arg"),
|
|
(r"\M-1", "digit-arg"),
|
|
(r"\M-2", "digit-arg"),
|
|
(r"\M-3", "digit-arg"),
|
|
(r"\M-4", "digit-arg"),
|
|
(r"\M-5", "digit-arg"),
|
|
(r"\M-6", "digit-arg"),
|
|
(r"\M-7", "digit-arg"),
|
|
(r"\M-8", "digit-arg"),
|
|
(r"\M-9", "digit-arg"),
|
|
(r"\M-\n", "accept"),
|
|
("\\\\", "self-insert"),
|
|
(r"\x1b[200~", "enable_bracketed_paste"),
|
|
(r"\x1b[201~", "disable_bracketed_paste"),
|
|
(r"\x03", "ctrl-c"),
|
|
]
|
|
+ [(c, "self-insert") for c in map(chr, range(32, 127)) if c != "\\"]
|
|
+ [(c, "self-insert") for c in map(chr, range(128, 256)) if c.isalpha()]
|
|
+ [
|
|
(r"\<up>", "up"),
|
|
(r"\<down>", "down"),
|
|
(r"\<left>", "left"),
|
|
(r"\C-\<left>", "backward-word"),
|
|
(r"\<right>", "right"),
|
|
(r"\C-\<right>", "forward-word"),
|
|
(r"\<delete>", "delete"),
|
|
(r"\<backspace>", "backspace"),
|
|
(r"\M-\<backspace>", "backward-kill-word"),
|
|
(r"\<end>", "end-of-line"), # was 'end'
|
|
(r"\<home>", "beginning-of-line"), # was 'home'
|
|
(r"\<f1>", "help"),
|
|
(r"\<f2>", "show-history"),
|
|
(r"\<f3>", "paste-mode"),
|
|
(r"\EOF", "end"), # the entries in the terminfo database for xterms
|
|
(r"\EOH", "home"), # seem to be wrong. this is a less than ideal
|
|
# workaround
|
|
]
|
|
)
|
|
|
|
|
|
@dataclass(slots=True)
|
|
class Reader:
|
|
"""The Reader class implements the bare bones of a command reader,
|
|
handling such details as editing and cursor motion. What it does
|
|
not support are such things as completion or history support -
|
|
these are implemented elsewhere.
|
|
|
|
Instance variables of note include:
|
|
|
|
* buffer:
|
|
A *list* (*not* a string at the moment :-) containing all the
|
|
characters that have been entered.
|
|
* console:
|
|
Hopefully encapsulates the OS dependent stuff.
|
|
* pos:
|
|
A 0-based index into 'buffer' for where the insertion point
|
|
is.
|
|
* screeninfo:
|
|
Ahem. This list contains some info needed to move the
|
|
insertion point around reasonably efficiently.
|
|
* cxy, lxy:
|
|
the position of the insertion point in screen ...
|
|
* syntax_table:
|
|
Dictionary mapping characters to 'syntax class'; read the
|
|
emacs docs to see what this means :-)
|
|
* commands:
|
|
Dictionary mapping command names to command classes.
|
|
* arg:
|
|
The emacs-style prefix argument. It will be None if no such
|
|
argument has been provided.
|
|
* dirty:
|
|
True if we need to refresh the display.
|
|
* kill_ring:
|
|
The emacs-style kill-ring; manipulated with yank & yank-pop
|
|
* ps1, ps2, ps3, ps4:
|
|
prompts. ps1 is the prompt for a one-line input; for a
|
|
multiline input it looks like:
|
|
ps2> first line of input goes here
|
|
ps3> second and further
|
|
ps3> lines get ps3
|
|
...
|
|
ps4> and the last one gets ps4
|
|
As with the usual top-level, you can set these to instances if
|
|
you like; str() will be called on them (once) at the beginning
|
|
of each command. Don't put really long or newline containing
|
|
strings here, please!
|
|
This is just the default policy; you can change it freely by
|
|
overriding get_prompt() (and indeed some standard subclasses
|
|
do).
|
|
* finished:
|
|
handle1 will set this to a true value if a command signals
|
|
that we're done.
|
|
"""
|
|
|
|
console: console.Console
|
|
|
|
## state
|
|
buffer: list[str] = field(default_factory=list)
|
|
pos: int = 0
|
|
ps1: str = "->> "
|
|
ps2: str = "/>> "
|
|
ps3: str = "|.. "
|
|
ps4: str = R"\__ "
|
|
kill_ring: list[list[str]] = field(default_factory=list)
|
|
msg: str = ""
|
|
arg: int | None = None
|
|
dirty: bool = False
|
|
finished: bool = False
|
|
paste_mode: bool = False
|
|
in_bracketed_paste: bool = False
|
|
commands: dict[str, type[Command]] = field(default_factory=make_default_commands)
|
|
last_command: type[Command] | None = None
|
|
syntax_table: dict[str, int] = field(default_factory=make_default_syntax_table)
|
|
keymap: tuple[tuple[str, str], ...] = ()
|
|
input_trans: input.KeymapTranslator = field(init=False)
|
|
input_trans_stack: list[input.KeymapTranslator] = field(default_factory=list)
|
|
screen: list[str] = field(default_factory=list)
|
|
screeninfo: list[tuple[int, list[int]]] = field(init=False)
|
|
cxy: tuple[int, int] = field(init=False)
|
|
lxy: tuple[int, int] = field(init=False)
|
|
scheduled_commands: list[str] = field(default_factory=list)
|
|
can_colorize: bool = False
|
|
|
|
## cached metadata to speed up screen refreshes
|
|
@dataclass
|
|
class RefreshCache:
|
|
in_bracketed_paste: bool = False
|
|
screen: list[str] = field(default_factory=list)
|
|
screeninfo: list[tuple[int, list[int]]] = field(init=False)
|
|
line_end_offsets: list[int] = field(default_factory=list)
|
|
pos: int = field(init=False)
|
|
cxy: tuple[int, int] = field(init=False)
|
|
dimensions: tuple[int, int] = field(init=False)
|
|
invalidated: bool = False
|
|
|
|
def update_cache(self,
|
|
reader: Reader,
|
|
screen: list[str],
|
|
screeninfo: list[tuple[int, list[int]]],
|
|
) -> None:
|
|
self.in_bracketed_paste = reader.in_bracketed_paste
|
|
self.screen = screen.copy()
|
|
self.screeninfo = screeninfo.copy()
|
|
self.pos = reader.pos
|
|
self.cxy = reader.cxy
|
|
self.dimensions = reader.console.width, reader.console.height
|
|
self.invalidated = False
|
|
|
|
def valid(self, reader: Reader) -> bool:
|
|
if self.invalidated:
|
|
return False
|
|
dimensions = reader.console.width, reader.console.height
|
|
dimensions_changed = dimensions != self.dimensions
|
|
paste_changed = reader.in_bracketed_paste != self.in_bracketed_paste
|
|
return not (dimensions_changed or paste_changed)
|
|
|
|
def get_cached_location(self, reader: Reader) -> tuple[int, int]:
|
|
if self.invalidated:
|
|
raise ValueError("Cache is invalidated")
|
|
offset = 0
|
|
earliest_common_pos = min(reader.pos, self.pos)
|
|
num_common_lines = len(self.line_end_offsets)
|
|
while num_common_lines > 0:
|
|
offset = self.line_end_offsets[num_common_lines - 1]
|
|
if earliest_common_pos > offset:
|
|
break
|
|
num_common_lines -= 1
|
|
else:
|
|
offset = 0
|
|
return offset, num_common_lines
|
|
|
|
last_refresh_cache: RefreshCache = field(default_factory=RefreshCache)
|
|
|
|
def __post_init__(self) -> None:
|
|
# Enable the use of `insert` without a `prepare` call - necessary to
|
|
# facilitate the tab completion hack implemented for
|
|
# <https://bugs.python.org/issue25660>.
|
|
self.keymap = self.collect_keymap()
|
|
self.input_trans = input.KeymapTranslator(
|
|
self.keymap, invalid_cls="invalid-key", character_cls="self-insert"
|
|
)
|
|
self.screeninfo = [(0, [])]
|
|
self.cxy = self.pos2xy()
|
|
self.lxy = (self.pos, 0)
|
|
self.can_colorize = can_colorize()
|
|
|
|
self.last_refresh_cache.screeninfo = self.screeninfo
|
|
self.last_refresh_cache.pos = self.pos
|
|
self.last_refresh_cache.cxy = self.cxy
|
|
self.last_refresh_cache.dimensions = (0, 0)
|
|
|
|
def collect_keymap(self) -> tuple[tuple[KeySpec, CommandName], ...]:
|
|
return default_keymap
|
|
|
|
def calc_screen(self) -> list[str]:
|
|
"""Translate changes in self.buffer into changes in self.console.screen."""
|
|
# Since the last call to calc_screen:
|
|
# screen and screeninfo may differ due to a completion menu being shown
|
|
# pos and cxy may differ due to edits, cursor movements, or completion menus
|
|
|
|
# Lines that are above both the old and new cursor position can't have changed,
|
|
# unless the terminal has been resized (which might cause reflowing) or we've
|
|
# entered or left paste mode (which changes prompts, causing reflowing).
|
|
num_common_lines = 0
|
|
offset = 0
|
|
if self.last_refresh_cache.valid(self):
|
|
offset, num_common_lines = self.last_refresh_cache.get_cached_location(self)
|
|
|
|
screen = self.last_refresh_cache.screen
|
|
del screen[num_common_lines:]
|
|
|
|
screeninfo = self.last_refresh_cache.screeninfo
|
|
del screeninfo[num_common_lines:]
|
|
|
|
last_refresh_line_end_offsets = self.last_refresh_cache.line_end_offsets
|
|
del last_refresh_line_end_offsets[num_common_lines:]
|
|
|
|
pos = self.pos
|
|
pos -= offset
|
|
|
|
prompt_from_cache = (offset and self.buffer[offset - 1] != "\n")
|
|
|
|
lines = "".join(self.buffer[offset:]).split("\n")
|
|
|
|
cursor_found = False
|
|
lines_beyond_cursor = 0
|
|
for ln, line in enumerate(lines, num_common_lines):
|
|
ll = len(line)
|
|
if 0 <= pos <= ll:
|
|
self.lxy = pos, ln
|
|
cursor_found = True
|
|
elif cursor_found:
|
|
lines_beyond_cursor += 1
|
|
if lines_beyond_cursor > self.console.height:
|
|
# No need to keep formatting lines.
|
|
# The console can't show them.
|
|
break
|
|
if prompt_from_cache:
|
|
# Only the first line's prompt can come from the cache
|
|
prompt_from_cache = False
|
|
prompt = ""
|
|
else:
|
|
prompt = self.get_prompt(ln, ll >= pos >= 0)
|
|
while "\n" in prompt:
|
|
pre_prompt, _, prompt = prompt.partition("\n")
|
|
last_refresh_line_end_offsets.append(offset)
|
|
screen.append(pre_prompt)
|
|
screeninfo.append((0, []))
|
|
pos -= ll + 1
|
|
prompt, lp = self.process_prompt(prompt)
|
|
l, l2 = disp_str(line)
|
|
wrapcount = (wlen(l) + lp) // self.console.width
|
|
if wrapcount == 0:
|
|
offset += ll + 1 # Takes all of the line plus the newline
|
|
last_refresh_line_end_offsets.append(offset)
|
|
screen.append(prompt + l)
|
|
screeninfo.append((lp, l2))
|
|
else:
|
|
i = 0
|
|
while l:
|
|
prelen = lp if i == 0 else 0
|
|
index_to_wrap_before = 0
|
|
column = 0
|
|
for character_width in l2:
|
|
if column + character_width >= self.console.width - prelen:
|
|
break
|
|
index_to_wrap_before += 1
|
|
column += character_width
|
|
pre = prompt if i == 0 else ""
|
|
if len(l) > index_to_wrap_before:
|
|
offset += index_to_wrap_before
|
|
post = "\\"
|
|
after = [1]
|
|
else:
|
|
offset += index_to_wrap_before + 1 # Takes the newline
|
|
post = ""
|
|
after = []
|
|
last_refresh_line_end_offsets.append(offset)
|
|
screen.append(pre + l[:index_to_wrap_before] + post)
|
|
screeninfo.append((prelen, l2[:index_to_wrap_before] + after))
|
|
l = l[index_to_wrap_before:]
|
|
l2 = l2[index_to_wrap_before:]
|
|
i += 1
|
|
self.screeninfo = screeninfo
|
|
self.cxy = self.pos2xy()
|
|
if self.msg:
|
|
for mline in self.msg.split("\n"):
|
|
screen.append(mline)
|
|
screeninfo.append((0, []))
|
|
|
|
self.last_refresh_cache.update_cache(self, screen, screeninfo)
|
|
return screen
|
|
|
|
@staticmethod
|
|
def process_prompt(prompt: str) -> tuple[str, int]:
|
|
"""Process the prompt.
|
|
|
|
This means calculate the length of the prompt. The character \x01
|
|
and \x02 are used to bracket ANSI control sequences and need to be
|
|
excluded from the length calculation. So also a copy of the prompt
|
|
is returned with these control characters removed."""
|
|
|
|
# The logic below also ignores the length of common escape
|
|
# sequences if they were not explicitly within \x01...\x02.
|
|
# They are CSI (or ANSI) sequences ( ESC [ ... LETTER )
|
|
|
|
# wlen from utils already excludes ANSI_ESCAPE_SEQUENCE chars,
|
|
# which breaks the logic below so we redefine it here.
|
|
def wlen(s: str) -> int:
|
|
return sum(str_width(i) for i in s)
|
|
|
|
out_prompt = ""
|
|
l = wlen(prompt)
|
|
pos = 0
|
|
while True:
|
|
s = prompt.find("\x01", pos)
|
|
if s == -1:
|
|
break
|
|
e = prompt.find("\x02", s)
|
|
if e == -1:
|
|
break
|
|
# Found start and end brackets, subtract from string length
|
|
l = l - (e - s + 1)
|
|
keep = prompt[pos:s]
|
|
l -= sum(map(wlen, ANSI_ESCAPE_SEQUENCE.findall(keep)))
|
|
out_prompt += keep + prompt[s + 1 : e]
|
|
pos = e + 1
|
|
keep = prompt[pos:]
|
|
l -= sum(map(wlen, ANSI_ESCAPE_SEQUENCE.findall(keep)))
|
|
out_prompt += keep
|
|
return out_prompt, l
|
|
|
|
def bow(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the word break preceding p most
|
|
immediately.
|
|
|
|
p defaults to self.pos; word boundaries are determined using
|
|
self.syntax_table."""
|
|
if p is None:
|
|
p = self.pos
|
|
st = self.syntax_table
|
|
b = self.buffer
|
|
p -= 1
|
|
while p >= 0 and st.get(b[p], SYNTAX_WORD) != SYNTAX_WORD:
|
|
p -= 1
|
|
while p >= 0 and st.get(b[p], SYNTAX_WORD) == SYNTAX_WORD:
|
|
p -= 1
|
|
return p + 1
|
|
|
|
def eow(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the word break following p most
|
|
immediately.
|
|
|
|
p defaults to self.pos; word boundaries are determined using
|
|
self.syntax_table."""
|
|
if p is None:
|
|
p = self.pos
|
|
st = self.syntax_table
|
|
b = self.buffer
|
|
while p < len(b) and st.get(b[p], SYNTAX_WORD) != SYNTAX_WORD:
|
|
p += 1
|
|
while p < len(b) and st.get(b[p], SYNTAX_WORD) == SYNTAX_WORD:
|
|
p += 1
|
|
return p
|
|
|
|
def bol(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the line break preceding p most
|
|
immediately.
|
|
|
|
p defaults to self.pos."""
|
|
if p is None:
|
|
p = self.pos
|
|
b = self.buffer
|
|
p -= 1
|
|
while p >= 0 and b[p] != "\n":
|
|
p -= 1
|
|
return p + 1
|
|
|
|
def eol(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the line break following p most
|
|
immediately.
|
|
|
|
p defaults to self.pos."""
|
|
if p is None:
|
|
p = self.pos
|
|
b = self.buffer
|
|
while p < len(b) and b[p] != "\n":
|
|
p += 1
|
|
return p
|
|
|
|
def max_column(self, y: int) -> int:
|
|
"""Return the last x-offset for line y"""
|
|
return self.screeninfo[y][0] + sum(self.screeninfo[y][1])
|
|
|
|
def max_row(self) -> int:
|
|
return len(self.screeninfo) - 1
|
|
|
|
def get_arg(self, default: int = 1) -> int:
|
|
"""Return any prefix argument that the user has supplied,
|
|
returning 'default' if there is None. Defaults to 1.
|
|
"""
|
|
if self.arg is None:
|
|
return default
|
|
return self.arg
|
|
|
|
def get_prompt(self, lineno: int, cursor_on_line: bool) -> str:
|
|
"""Return what should be in the left-hand margin for line
|
|
'lineno'."""
|
|
if self.arg is not None and cursor_on_line:
|
|
prompt = f"(arg: {self.arg}) "
|
|
elif self.paste_mode and not self.in_bracketed_paste:
|
|
prompt = "(paste) "
|
|
elif "\n" in self.buffer:
|
|
if lineno == 0:
|
|
prompt = self.ps2
|
|
elif self.ps4 and lineno == self.buffer.count("\n"):
|
|
prompt = self.ps4
|
|
else:
|
|
prompt = self.ps3
|
|
else:
|
|
prompt = self.ps1
|
|
|
|
if self.can_colorize:
|
|
prompt = f"{ANSIColors.BOLD_MAGENTA}{prompt}{ANSIColors.RESET}"
|
|
return prompt
|
|
|
|
def push_input_trans(self, itrans: input.KeymapTranslator) -> None:
|
|
self.input_trans_stack.append(self.input_trans)
|
|
self.input_trans = itrans
|
|
|
|
def pop_input_trans(self) -> None:
|
|
self.input_trans = self.input_trans_stack.pop()
|
|
|
|
def setpos_from_xy(self, x: int, y: int) -> None:
|
|
"""Set pos according to coordinates x, y"""
|
|
pos = 0
|
|
i = 0
|
|
while i < y:
|
|
prompt_len, character_widths = self.screeninfo[i]
|
|
offset = len(character_widths) - character_widths.count(0)
|
|
in_wrapped_line = prompt_len + sum(character_widths) >= self.console.width
|
|
if in_wrapped_line:
|
|
pos += offset - 1 # -1 cause backslash is not in buffer
|
|
else:
|
|
pos += offset + 1 # +1 cause newline is in buffer
|
|
i += 1
|
|
|
|
j = 0
|
|
cur_x = self.screeninfo[i][0]
|
|
while cur_x < x:
|
|
if self.screeninfo[i][1][j] == 0:
|
|
continue
|
|
cur_x += self.screeninfo[i][1][j]
|
|
j += 1
|
|
pos += 1
|
|
|
|
self.pos = pos
|
|
|
|
def pos2xy(self) -> tuple[int, int]:
|
|
"""Return the x, y coordinates of position 'pos'."""
|
|
# this *is* incomprehensible, yes.
|
|
y = 0
|
|
pos = self.pos
|
|
assert 0 <= pos <= len(self.buffer)
|
|
if pos == len(self.buffer):
|
|
y = len(self.screeninfo) - 1
|
|
p, l2 = self.screeninfo[y]
|
|
return p + sum(l2) + l2.count(0), y
|
|
|
|
for p, l2 in self.screeninfo:
|
|
l = len(l2) - l2.count(0)
|
|
in_wrapped_line = p + sum(l2) >= self.console.width
|
|
offset = l - 1 if in_wrapped_line else l # need to remove backslash
|
|
if offset >= pos:
|
|
break
|
|
|
|
if p + sum(l2) >= self.console.width:
|
|
pos -= l - 1 # -1 cause backslash is not in buffer
|
|
else:
|
|
pos -= l + 1 # +1 cause newline is in buffer
|
|
y += 1
|
|
return p + sum(l2[:pos]), y
|
|
|
|
def insert(self, text: str | list[str]) -> None:
|
|
"""Insert 'text' at the insertion point."""
|
|
self.buffer[self.pos : self.pos] = list(text)
|
|
self.pos += len(text)
|
|
self.dirty = True
|
|
|
|
def update_cursor(self) -> None:
|
|
"""Move the cursor to reflect changes in self.pos"""
|
|
self.cxy = self.pos2xy()
|
|
self.console.move_cursor(*self.cxy)
|
|
|
|
def after_command(self, cmd: Command) -> None:
|
|
"""This function is called to allow post command cleanup."""
|
|
if getattr(cmd, "kills_digit_arg", True):
|
|
if self.arg is not None:
|
|
self.dirty = True
|
|
self.arg = None
|
|
|
|
def prepare(self) -> None:
|
|
"""Get ready to run. Call restore when finished. You must not
|
|
write to the console in between the calls to prepare and
|
|
restore."""
|
|
try:
|
|
self.console.prepare()
|
|
self.arg = None
|
|
self.finished = False
|
|
del self.buffer[:]
|
|
self.pos = 0
|
|
self.dirty = True
|
|
self.last_command = None
|
|
self.calc_screen()
|
|
except BaseException:
|
|
self.restore()
|
|
raise
|
|
|
|
while self.scheduled_commands:
|
|
cmd = self.scheduled_commands.pop()
|
|
self.do_cmd((cmd, []))
|
|
|
|
def last_command_is(self, cls: type) -> bool:
|
|
if not self.last_command:
|
|
return False
|
|
return issubclass(cls, self.last_command)
|
|
|
|
def restore(self) -> None:
|
|
"""Clean up after a run."""
|
|
self.console.restore()
|
|
|
|
@contextmanager
|
|
def suspend(self) -> SimpleContextManager:
|
|
"""A context manager to delegate to another reader."""
|
|
prev_state = {f.name: getattr(self, f.name) for f in fields(self)}
|
|
try:
|
|
self.restore()
|
|
yield
|
|
finally:
|
|
for arg in ("msg", "ps1", "ps2", "ps3", "ps4", "paste_mode"):
|
|
setattr(self, arg, prev_state[arg])
|
|
self.prepare()
|
|
|
|
def finish(self) -> None:
|
|
"""Called when a command signals that we're finished."""
|
|
pass
|
|
|
|
def error(self, msg: str = "none") -> None:
|
|
self.msg = "! " + msg + " "
|
|
self.dirty = True
|
|
self.console.beep()
|
|
|
|
def update_screen(self) -> None:
|
|
if self.dirty:
|
|
self.refresh()
|
|
|
|
def refresh(self) -> None:
|
|
"""Recalculate and refresh the screen."""
|
|
if self.in_bracketed_paste and self.buffer and not self.buffer[-1] == "\n":
|
|
return
|
|
|
|
# this call sets up self.cxy, so call it first.
|
|
self.screen = self.calc_screen()
|
|
self.console.refresh(self.screen, self.cxy)
|
|
self.dirty = False
|
|
|
|
def do_cmd(self, cmd: tuple[str, list[str]]) -> None:
|
|
"""`cmd` is a tuple of "event_name" and "event", which in the current
|
|
implementation is always just the "buffer" which happens to be a list
|
|
of single-character strings."""
|
|
|
|
trace("received command {cmd}", cmd=cmd)
|
|
if isinstance(cmd[0], str):
|
|
command_type = self.commands.get(cmd[0], commands.invalid_command)
|
|
elif isinstance(cmd[0], type):
|
|
command_type = cmd[0]
|
|
else:
|
|
return # nothing to do
|
|
|
|
command = command_type(self, *cmd) # type: ignore[arg-type]
|
|
command.do()
|
|
|
|
self.after_command(command)
|
|
|
|
if self.dirty:
|
|
self.refresh()
|
|
else:
|
|
self.update_cursor()
|
|
|
|
if not isinstance(cmd, commands.digit_arg):
|
|
self.last_command = command_type
|
|
|
|
self.finished = bool(command.finish)
|
|
if self.finished:
|
|
self.console.finish()
|
|
self.finish()
|
|
|
|
def handle1(self, block: bool = True) -> bool:
|
|
"""Handle a single event. Wait as long as it takes if block
|
|
is true (the default), otherwise return False if no event is
|
|
pending."""
|
|
|
|
if self.msg:
|
|
self.msg = ""
|
|
self.dirty = True
|
|
|
|
while True:
|
|
input_hook = self.console.input_hook
|
|
if input_hook:
|
|
input_hook()
|
|
# We use the same timeout as in readline.c: 100ms
|
|
while not self.console.wait(100):
|
|
input_hook()
|
|
event = self.console.get_event(block=False)
|
|
else:
|
|
event = self.console.get_event(block)
|
|
if not event: # can only happen if we're not blocking
|
|
return False
|
|
|
|
translate = True
|
|
|
|
if event.evt == "key":
|
|
self.input_trans.push(event)
|
|
elif event.evt == "scroll":
|
|
self.refresh()
|
|
elif event.evt == "resize":
|
|
self.refresh()
|
|
else:
|
|
translate = False
|
|
|
|
if translate:
|
|
cmd = self.input_trans.get()
|
|
else:
|
|
cmd = [event.evt, event.data]
|
|
|
|
if cmd is None:
|
|
if block:
|
|
continue
|
|
else:
|
|
return False
|
|
|
|
self.do_cmd(cmd)
|
|
return True
|
|
|
|
def push_char(self, char: int | bytes) -> None:
|
|
self.console.push_char(char)
|
|
self.handle1(block=False)
|
|
|
|
def readline(self, startup_hook: Callback | None = None) -> str:
|
|
"""Read a line. The implementation of this method also shows
|
|
how to drive Reader if you want more control over the event
|
|
loop."""
|
|
self.prepare()
|
|
try:
|
|
if startup_hook is not None:
|
|
startup_hook()
|
|
self.refresh()
|
|
while not self.finished:
|
|
self.handle1()
|
|
return self.get_unicode()
|
|
|
|
finally:
|
|
self.restore()
|
|
|
|
def bind(self, spec: KeySpec, command: CommandName) -> None:
|
|
self.keymap = self.keymap + ((spec, command),)
|
|
self.input_trans = input.KeymapTranslator(
|
|
self.keymap, invalid_cls="invalid-key", character_cls="self-insert"
|
|
)
|
|
|
|
def get_unicode(self) -> str:
|
|
"""Return the current buffer as a unicode string."""
|
|
return "".join(self.buffer)
|