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import abc
import typing
import urwid
from urwid.text_layout import calc_coords
import mitmproxy.flow
import mitmproxy.master
import mitmproxy.command
import mitmproxy.types
class Completer: # pragma: no cover
@abc.abstractmethod
def cycle(self) -> str:
pass
class ListCompleter(Completer):
def __init__(
self,
start: str,
options: typing.Sequence[str],
) -> None:
self.start = start
self.options = [] # type: typing.Sequence[str]
for o in options:
if o.startswith(start):
self.options.append(o)
self.options.sort()
self.offset = 0
def cycle(self) -> str:
if not self.options:
return self.start
ret = self.options[self.offset]
self.offset = (self.offset + 1) % len(self.options)
return ret
CompletionState = typing.NamedTuple(
"CompletionState",
[
("completer", Completer),
("parse", typing.Sequence[mitmproxy.command.ParseResult])
]
)
class CommandBuffer:
def __init__(self, master: mitmproxy.master.Master, start: str = "") -> None:
self.master = master
self.text = self.flatten(start)
# Cursor is always within the range [0:len(buffer)].
self._cursor = len(self.text)
self.completion = None # type: CompletionState
@property
def cursor(self) -> int:
return self._cursor
@cursor.setter
def cursor(self, x) -> None:
if x < 0:
self._cursor = 0
elif x > len(self.text):
self._cursor = len(self.text)
else:
self._cursor = x
def maybequote(self, value):
if " " in value and not value.startswith("\""):
return "\"%s\"" % value
return value
def parse_quoted(self, txt):
parts, remhelp = self.master.commands.parse_partial(txt)
for i, p in enumerate(parts):
parts[i] = mitmproxy.command.ParseResult(
value = self.maybequote(p.value),
type = p.type,
valid = p.valid
)
return parts, remhelp
def render(self):
"""
This function is somewhat tricky - in order to make the cursor
position valid, we have to make sure there is a
character-for-character offset match in the rendered output, up
to the cursor. Beyond that, we can add stuff.
"""
parts, remhelp = self.parse_quoted(self.text)
ret = []
for p in parts:
if p.valid:
if p.type == mitmproxy.types.Cmd:
ret.append(("commander_command", p.value))
else:
ret.append(("text", p.value))
elif p.value:
ret.append(("commander_invalid", p.value))
else:
ret.append(("text", ""))
ret.append(("text", " "))
if remhelp:
ret.append(("text", " "))
for v in remhelp:
ret.append(("commander_hint", "%s " % v))
return ret
def flatten(self, txt):
parts, _ = self.parse_quoted(txt)
ret = [x.value for x in parts]
return " ".join(ret)
def left(self) -> None:
self.cursor = self.cursor - 1
def right(self) -> None:
self.cursor = self.cursor + 1
def cycle_completion(self) -> None:
if not self.completion:
parts, remainhelp = self.master.commands.parse_partial(self.text[:self.cursor])
last = parts[-1]
ct = mitmproxy.types.CommandTypes.get(last.type, None)
if ct:
self.completion = CompletionState(
completer = ListCompleter(
parts[-1].value,
ct.completion(self.master.commands, last.type, parts[-1].value)
),
parse = parts,
)
if self.completion:
nxt = self.completion.completer.cycle()
buf = " ".join([i.value for i in self.completion.parse[:-1]]) + " " + nxt
buf = buf.strip()
self.text = self.flatten(buf)
self.cursor = len(self.text)
def backspace(self) -> None:
if self.cursor == 0:
return
self.text = self.flatten(self.text[:self.cursor - 1] + self.text[self.cursor:])
self.cursor = self.cursor - 1
self.completion = None
def insert(self, k: str) -> None:
"""
Inserts text at the cursor.
"""
self.text = self.flatten(self.text[:self.cursor] + k + self.text[self.cursor:])
self.cursor += 1
self.completion = None
class CommandEdit(urwid.WidgetWrap):
leader = ": "
def __init__(self, master: mitmproxy.master.Master, text: str) -> None:
super().__init__(urwid.Text(self.leader))
self.master = master
self.cbuf = CommandBuffer(master, text)
self.update()
def keypress(self, size, key):
if key == "backspace":
self.cbuf.backspace()
elif key == "left":
self.cbuf.left()
elif key == "right":
self.cbuf.right()
elif key == "tab":
self.cbuf.cycle_completion()
elif len(key) == 1:
self.cbuf.insert(key)
self.update()
def update(self):
self._w.set_text([self.leader, self.cbuf.render()])
def render(self, size, focus=False):
(maxcol,) = size
canv = self._w.render((maxcol,))
canv = urwid.CompositeCanvas(canv)
canv.cursor = self.get_cursor_coords((maxcol,))
return canv
def get_cursor_coords(self, size):
p = self.cbuf.cursor + len(self.leader)
trans = self._w.get_line_translation(size[0])
x, y = calc_coords(self._w.get_text()[0], trans, p)
return x, y
def get_edit_text(self):
return self.cbuf.text
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