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urwid.py
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1360 lines (1140 loc) · 47.9 KB
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# The MIT License
#
# Copyright (c) 2010-2011 Marien Zwart
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# This whole file typing TODO
# type: ignore
"""bpython backend based on Urwid.
Based on Urwid 0.9.9.
This steals many things from bpython's "cli" backend.
This is still *VERY* rough.
"""
importsys
importos
importtime
importlocale
importsignal
importurwid
from .importargsasbpargs,repl,translations
from .formatterimporttheme_map
from .translationsimport_
from .keysimporturwid_key_dispatchaskey_dispatch
# Urwid colors are:
# 'black', 'dark red', 'dark green', 'brown', 'dark blue',
# 'dark magenta', 'dark cyan', 'light gray', 'dark gray',
# 'light red', 'light green', 'yellow', 'light blue',
# 'light magenta', 'light cyan', 'white'
# and bpython has:
# blacK, Red, Green, Yellow, Blue, Magenta, Cyan, White, Default
COLORMAP= {
"k":"black",
"r":"dark red",# or light red?
"g":"dark green",# or light green?
"y":"yellow",
"b":"dark blue",# or light blue?
"m":"dark magenta",# or light magenta?
"c":"dark cyan",# or light cyan?
"w":"white",
"d":"default",
}
try:
fromtwisted.internetimportprotocol
fromtwisted.protocolsimportbasic
exceptImportError:
pass
else:
classEvalProtocol(basic.LineOnlyReceiver):
delimiter="\n"
def__init__(self,myrepl)->None:
self.repl=myrepl
deflineReceived(self,line)->None:
# HACK!
# TODO: deal with encoding issues here...
self.repl.main_loop.process_input(line)
self.repl.main_loop.process_input(["enter"])
classEvalFactory(protocol.ServerFactory):
def__init__(self,myrepl):
self.repl=myrepl
defbuildProtocol(self,addr):
returnEvalProtocol(self.repl)
# If Twisted is not available urwid has no TwistedEventLoop attribute.
# Code below will try to import reactor before using TwistedEventLoop.
# I assume TwistedEventLoop will be available if that import succeeds.
TwistedEventLoop=getattr(urwid,"TwistedEventLoop",None)
classStatusbarEdit(urwid.Edit):
"""Wrapper around urwid.Edit used for the prompt in Statusbar.
This class only adds a single signal that is emitted if the user presses
Enter."""
signals=urwid.Edit.signals+ ["prompt_enter"]
def__init__(self,*args,**kwargs):
self.single=False
super().__init__(*args,**kwargs)
defkeypress(self,size,key):
ifself.single:
urwid.emit_signal(self,"prompt_enter",self,key)
elifkey=="enter":
urwid.emit_signal(self,"prompt_enter",self,self.get_edit_text())
else:
returnsuper().keypress(size,key)
urwid.register_signal(StatusbarEdit,"prompt_enter")
classStatusbar:
"""Statusbar object, ripped off from bpython.cli.
This class provides the status bar at the bottom of the screen.
It has message() and prompt() methods for user interactivity, as
well as settext() and clear() methods for changing its appearance.
The check() method needs to be called repeatedly if the statusbar is
going to be aware of when it should update its display after a message()
has been called (it'll display for a couple of seconds and then disappear).
It should be called as:
foo = Statusbar('Initial text to display')
or, for a blank statusbar:
foo = Statusbar()
The "widget" attribute is an urwid widget.
"""
signals= ["prompt_result"]
def__init__(self,config,s=None,main_loop=None):
self.config=config
self.timer=None
self.main_loop=main_loop
self.s=sor""
self.text=urwid.Text(("main",self.s))
# use wrap mode 'clip' to just cut off at the end of line
self.text.set_wrap_mode("clip")
self.edit=StatusbarEdit(("main",""))
urwid.connect_signal(self.edit,"prompt_enter",self._on_prompt_enter)
self.widget=urwid.Columns([self.text,self.edit])
def_check(self,callback,userdata=None):
"""This is the method is called from the timer to reset the status bar."""
self.timer=None
self.settext(self.s)
defmessage(self,s,n=3):
"""Display a message for a short n seconds on the statusbar and return
it to its original state."""
self.settext(s)
self.timer=self.main_loop.set_alarm_in(n,self._check)
def_reset_timer(self):
"""Reset the timer from message."""
ifself.timerisnotNone:
self.main_loop.remove_alarm(self.timer)
self.timer=None
defprompt(self,s=None,single=False):
"""Prompt the user for some input (with the optional prompt 's'). After
the user hit enter the signal 'prompt_result' will be emitted and the
status bar will be reset. If single is True, the first keypress will be
returned."""
self._reset_timer()
self.edit.single=single
self.edit.set_caption(("main",sor"?"))
self.edit.set_edit_text("")
# hide the text and display the edit widget
ifself.editnotinself.widget.widget_list:
self.widget.widget_list.append(self.edit)
ifself.textinself.widget.widget_list:
self.widget.widget_list.remove(self.text)
self.widget.set_focus_column(0)
defsettext(self,s,permanent=False):
"""Set the text on the status bar to a new value. If permanent is True,
the new value will be permanent. If that status bar is in prompt mode,
the prompt will be aborted."""
self._reset_timer()
# hide the edit and display the text widget
ifself.editinself.widget.widget_list:
self.widget.widget_list.remove(self.edit)
ifself.textnotinself.widget.widget_list:
self.widget.widget_list.append(self.text)
self.text.set_text(("main",s))
ifpermanent:
self.s=s
defclear(self):
"""Clear the status bar."""
self.settext("")
def_on_prompt_enter(self,edit,new_text):
"""Reset the statusbar and pass the input from the prompt to the caller
via 'prompt_result'."""
self.settext(self.s)
urwid.emit_signal(self,"prompt_result",new_text)
urwid.register_signal(Statusbar,"prompt_result")
defdecoding_input_filter(keys:list[str],_raw:list[int])->list[str]:
"""Input filter for urwid which decodes each key with the locale's
preferred encoding.'"""
encoding=locale.getpreferredencoding()
return [key.decode(encoding)forkeyinkeys]
defformat_tokens(tokensource):
fortoken,textintokensource:
iftext=="\n":
continue
# TODO: something about inversing Parenthesis
whiletokennotintheme_map:
token=token.parent
yield (theme_map[token],text)
classBPythonEdit(urwid.Edit):
"""Customized editor *very* tightly interwoven with URWIDRepl.
Changes include:
- The edit text supports markup, not just the caption.
This works by calling set_edit_markup from the change event
as well as whenever markup changes while text does not.
- The widget can be made readonly, which currently just means
it is no longer selectable and stops drawing the cursor.
This is currently a one-way operation, but that is just because
I only need and test the readwrite->readonly transition.
- move_cursor_to_coords is ignored
(except for internal calls from keypress or mouse_event).
- arrow up/down are ignored.
- an "edit-pos-changed" signal is emitted when edit_pos changes.
"""
signals= ["edit-pos-changed"]
def__init__(self,config,*args,**kwargs):
self._bpy_text=""
self._bpy_attr= []
self._bpy_selectable=True
self._bpy_may_move_cursor=False
self.config=config
self.tab_length=config.tab_length
super().__init__(*args,**kwargs)
defset_edit_pos(self,pos):
super().set_edit_pos(pos)
self._emit("edit-pos-changed",self.edit_pos)
defget_edit_pos(self):
returnself._edit_pos
edit_pos=property(get_edit_pos,set_edit_pos)
defmake_readonly(self):
self._bpy_selectable=False
# This is necessary to prevent the listbox we are in getting
# fresh cursor coords of None from get_cursor_coords
# immediately after we go readonly and then getting a cached
# canvas that still has the cursor set. It spots that
# inconsistency and raises.
self._invalidate()
defset_edit_markup(self,markup):
"""Call this when markup changes but the underlying text does not.
You should arrange for this to be called from the 'change' signal.
"""
ifmarkup:
self._bpy_text,self._bpy_attr=urwid.decompose_tagmarkup(markup)
else:
# decompose_tagmarkup in some urwids fails on the empty list
self._bpy_text,self._bpy_attr="", []
# This is redundant when we're called off the 'change' signal.
# I'm assuming this is cheap, making that ok.
self._invalidate()
defget_text(self):
returnself._caption+self._bpy_text,self._attrib+self._bpy_attr
defselectable(self):
returnself._bpy_selectable
defget_cursor_coords(self,*args,**kwargs):
# urwid gets confused if a nonselectable widget has a cursor position.
ifnotself._bpy_selectable:
returnNone
returnsuper().get_cursor_coords(*args,**kwargs)
defrender(self,size,focus=False):
# XXX I do not want to have to do this, but listbox gets confused
# if I do not (getting None out of get_cursor_coords because
# we just became unselectable, then having this render a cursor)
ifnotself._bpy_selectable:
focus=False
returnsuper().render(size,focus=focus)
defget_pref_col(self,size):
# Need to make this deal with us being nonselectable
ifnotself._bpy_selectable:
return"left"
returnsuper().get_pref_col(size)
defmove_cursor_to_coords(self,*args):
ifself._bpy_may_move_cursor:
returnsuper().move_cursor_to_coords(*args)
returnFalse
defkeypress(self,size,key):
ifurwid.command_map[key]in ("cursor up","cursor down"):
# Do not handle up/down arrow, leave them for the repl.
returnkey
self._bpy_may_move_cursor=True
try:
ifurwid.command_map[key]=="cursor max left":
self.edit_pos=0
elifurwid.command_map[key]=="cursor max right":
self.edit_pos=len(self.get_edit_text())
elifurwid.command_map[key]=="clear word":
# ^w
ifself.edit_pos==0:
return
line=self.get_edit_text()
# delete any space left of the cursor
p=len(line[:self.edit_pos].strip())
line=line[:p]+line[self.edit_pos :]
# delete a full word
np=line.rfind(" ",0,p)
ifnp==-1:
line=line[p:]
np=0
else:
line=line[:np]+line[p:]
self.set_edit_text(line)
self.edit_pos=np
elifurwid.command_map[key]=="clear line":
line=self.get_edit_text()
self.set_edit_text(line[self.edit_pos :])
self.edit_pos=0
elifkey=="backspace":
line=self.get_edit_text()
cpos=len(line)-self.edit_pos
ifnot (cposorlen(line)%self.tab_lengthorline.strip()):
self.set_edit_text(line[:-self.tab_length])
else:
returnsuper().keypress(size,key)
else:
# TODO: Add in specific keypress fetching code here
returnsuper().keypress(size,key)
returnNone
finally:
self._bpy_may_move_cursor=False
defmouse_event(self,*args):
self._bpy_may_move_cursor=True
try:
returnsuper().mouse_event(*args)
finally:
self._bpy_may_move_cursor=False
classBPythonListBox(urwid.ListBox):
"""Like `urwid.ListBox`, except that it does not eat up and
down keys.
"""
defkeypress(self,size,key):
ifkeynotin ("up","down"):
returnurwid.ListBox.keypress(self,size,key)
returnkey
classTooltip(urwid.Widget):
"""Container inspired by Overlay to position our tooltip.
bottom_w should be a BoxWidget.
The top window currently has to be a listbox to support shrinkwrapping.
This passes keyboard events to the bottom instead of the top window.
It also positions the top window relative to the cursor position
from the bottom window and hides it if there is no cursor.
"""
_sizing=frozenset(["box"])
_selectable=True
def__init__(self,bottom_w,listbox):
super().__init__()
self.bottom_w=bottom_w
self.listbox=listbox
# TODO: this linebox should use the 'main' color.
self.top_w=urwid.LineBox(listbox)
self.tooltip_focus=False
defselectable(self):
returnself.bottom_w.selectable()
defkeypress(self,size,key):
returnself.bottom_w.keypress(size,key)
defmouse_event(self,size,event,button,col,row,focus):
# TODO: pass to top widget if visible and inside it.
ifnothasattr(self.bottom_w,"mouse_event"):
returnFalse
returnself.bottom_w.mouse_event(size,event,button,col,row,focus)
defget_cursor_coords(self,size):
returnself.bottom_w.get_cursor_coords(size)
defrender(self,size,focus=False):
maxcol,maxrow=size
bottom_c=self.bottom_w.render(size,focus)
cursor=bottom_c.cursor
ifnotcursor:
# Hide the tooltip if there is no cursor.
returnbottom_c
cursor_x,cursor_y=cursor
ifcursor_y*2<maxrow:
# Cursor is in the top half. Tooltip goes below it:
y=cursor_y+1
rows=maxrow-y
else:
# Cursor is in the bottom half. Tooltip fills the area above:
y=0
rows=cursor_y
# HACK: shrink-wrap the tooltip. This is ugly in multiple ways:
# - It only works on a listbox.
# - It assumes the wrapping LineBox eats one char on each edge.
# - It is a loop.
# (ideally it would check how much free space there is,
# instead of repeatedly trying smaller sizes)
while"bottom"inself.listbox.ends_visible((maxcol-2,rows-3)):
rows-=1
# If we're displaying above the cursor move the top edge down:
ifnoty:
y=cursor_y-rows
# Render *both* windows focused. This is probably not normal in urwid,
# but it works nicely.
top_c=self.top_w.render((maxcol,rows),focusandself.tooltip_focus)
combi_c=urwid.CanvasOverlay(top_c,bottom_c,0,y)
# Use the cursor coordinates from the bottom canvas.
canvas=urwid.CompositeCanvas(combi_c)
canvas.cursor=cursor
returncanvas
classURWIDInteraction(repl.Interaction):
def__init__(self,config,statusbar,frame):
super().__init__(config)
self.statusbar=statusbar
self.frame=frame
urwid.connect_signal(statusbar,"prompt_result",self._prompt_result)
self.callback=None
defconfirm(self,q,callback):
"""Ask for yes or no and call callback to return the result"""
defcallback_wrapper(result):
callback(result.lower()in (_("y"),_("yes")))
self.prompt(q,callback_wrapper,single=True)
defnotify(self,s,n=10,wait_for_keypress=False):
returnself.statusbar.message(s,n)
defprompt(self,s,callback=None,single=False):
"""Prompt the user for input. The result will be returned via calling
callback. Note that there can only be one prompt active. But the
callback can already start a new prompt."""
ifself.callbackisnotNone:
raiseException("Prompt already in progress")
self.callback=callback
self.statusbar.prompt(s,single=single)
self.frame.set_focus("footer")
def_prompt_result(self,text):
self.frame.set_focus("body")
ifself.callbackisnotNone:
# The callback might want to start another prompt, so reset it
# before calling the callback.
callback=self.callback
self.callback=None
callback(text)
deffile_prompt(self,s:str)->str|None:
raiseNotImplementedError
classURWIDRepl(repl.Repl):
_time_between_redraws=0.05# seconds
def__init__(self,event_loop,palette,interpreter,config):
super().__init__(interpreter,config)
self._redraw_handle=None
self._redraw_pending=False
self._redraw_time=0
self.listbox=BPythonListBox(urwid.SimpleListWalker([]))
self.tooltip=urwid.ListBox(urwid.SimpleListWalker([]))
self.tooltip.grid=None
self.overlay=Tooltip(self.listbox,self.tooltip)
self.stdout_hist=""# native str (unicode in Py3)
self.frame=urwid.Frame(self.overlay)
ifurwid.get_encoding_mode()=="narrow":
input_filter=decoding_input_filter
else:
input_filter=None
# This constructs a raw_display.Screen, which nabs sys.stdin/out.
self.main_loop=urwid.MainLoop(
self.frame,
palette,
event_loop=event_loop,
unhandled_input=self.handle_input,
input_filter=input_filter,
handle_mouse=False,
)
# String is straight from bpython.cli
self.statusbar=Statusbar(
config,
_(
" <%s> Rewind <%s> Save <%s> Pastebin "
" <%s> Pager <%s> Show Source "
)
% (
config.undo_key,
config.save_key,
config.pastebin_key,
config.last_output_key,
config.show_source_key,
),
self.main_loop,
)
self.frame.set_footer(self.statusbar.widget)
self.interact=URWIDInteraction(
self.config,self.statusbar,self.frame
)
self.edits= []
self.edit=None
self.current_output=None
self._completion_update_suppressed=False
# Bulletproof: this is a value extract_exit_value accepts.
self.exit_value= ()
load_urwid_command_map(config)
# Subclasses of Repl need to implement echo, current_line, cw
defecho(self,orig_s):
s=orig_s.rstrip("\n")
ifs:
ifself.current_outputisNone:
self.current_output=urwid.Text(("output",s))
ifself.editisNone:
self.listbox.body.append(self.current_output)
# Focus the widget we just added to force the
# listbox to scroll. This causes output to scroll
# if the user runs a blocking call that prints
# more than a screenful, instead of staying
# scrolled to the previous input line and then
# jumping to the bottom when done.
self.listbox.set_focus(len(self.listbox.body)-1)
else:
self.listbox.body.insert(-1,self.current_output)
# The edit widget should be focused and *stay* focused.
# XXX TODO: make sure the cursor stays in the same spot.
self.listbox.set_focus(len(self.listbox.body)-1)
else:
# XXX this assumes this all has "output" markup applied.
self.current_output.set_text(
("output",self.current_output.text+s)
)
iforig_s.endswith("\n"):
self.current_output=None
# If we hit this repeatedly in a loop the redraw is rather
# slow (testcase: pprint(__builtins__). So if we have recently
# drawn the screen already schedule a call in the future.
#
# Unfortunately we may hit this function repeatedly through a
# blocking call triggered by the user, in which case our
# timeout will not run timely as we do not return to urwid's
# eventloop. So we manually check if our timeout has long
# since expired, and redraw synchronously if it has.
ifself._redraw_handleisNone:
self.main_loop.draw_screen()
defmaybe_redraw(loop,self):
ifself._redraw_pending:
loop.draw_screen()
self._redraw_pending=False
self._redraw_handle=None
self._redraw_handle=self.main_loop.set_alarm_in(
self._time_between_redraws,maybe_redraw,self
)
self._redraw_time=time.time()
else:
self._redraw_pending=True
now=time.time()
ifnow-self._redraw_time>2*self._time_between_redraws:
# The timeout is well past expired, assume we're
# blocked and redraw synchronously.
self.main_loop.draw_screen()
self._redraw_time=now
def_get_current_line(self):
ifself.editisNone:
return""
returnself.edit.get_edit_text()
def_set_current_line(self,line):
self.edit.set_edit_text(line)
current_line=property(
_get_current_line,
_set_current_line,
None,
"Return the current line (the one the cursor is in).",
)
defcw(self):
"""Return the current word (incomplete word left of cursor)."""
ifself.editisNone:
return
pos=self.edit.edit_pos
text=self.edit.get_edit_text()
ifpos!=len(text):
# Disable autocomplete if not at end of line, like cli does.
return
# Stolen from cli. TODO: clean up and split out.
ifnottextor (nottext[-1].isalnum()andtext[-1]notin (".","_")):
return
# Seek backwards in text for the first non-identifier char:
fori,cinenumerate(reversed(text)):
ifnotc.isalnum()andcnotin (".","_"):
break
else:
# No non-identifiers, return everything.
returntext
# Return everything to the right of the non-identifier.
returntext[-i:]
@property
defcpos(self):
ifself.editisnotNone:
returnlen(self.current_line)-self.edit.edit_pos
return0
def_get_cursor_offset(self):
returnself.edit.edit_pos
def_set_cursor_offset(self,offset):
self.edit.edit_pos=offset
cursor_offset=property(
_get_cursor_offset,
_set_cursor_offset,
None,
"The cursor offset from the beginning of the line",
)
def_populate_completion(self):
widget_list=self.tooltip.body
whilewidget_list:
widget_list.pop()
# This is just me flailing around wildly. TODO: actually write.
ifself.complete():
ifself.funcprops:
# This is mostly just stolen from the cli module.
func_name=self.funcprops.func
args=self.funcprops.argspec.args
is_bound=self.funcprops.is_bound_method
in_arg=self.arg_pos
varargs=self.funcprops.argspec.varargs
varkw=self.funcprops.argspec.varkwargs
defaults=self.funcprops.argspec.defaults
kwonly=self.funcprops.argspec.kwonly
kwonly_defaults=self.funcprops.argspec.kwonly_defaultsor {}
markup= [("bold name",func_name), ("name",": (")]
# the isinstance checks if we're in a positional arg
# (instead of a keyword arg), I think
ifis_boundandisinstance(in_arg,int):
in_arg+=1
# bpython.cli checks if this goes off the edge and
# does clever wrapping. I do not (yet).
fork,iinenumerate(args):
ifdefaultsandk+1>len(args)-len(defaults):
kw=repr(defaults[k- (len(args)-len(defaults))])
else:
kw=None
ifnotkandstr(i)=="self":
color="name"
else:
color="token"
ifk==in_argori==in_arg:
color="bold "+color
markup.append((color,str(i)))
ifkwisnotNone:
markup.extend([("punctuation","="), ("token",kw)])
ifk!=len(args)-1:
markup.append(("punctuation",", "))
ifvarargs:
ifargs:
markup.append(("punctuation",", "))
markup.append(("token","*"+varargs))
ifkwonly:
ifnotvarargs:
ifargs:
markup.append(("punctuation",", "))
markup.append(("punctuation","*"))
forarginkwonly:
ifarg==in_arg:
color="bold token"
else:
color="token"
markup.extend([("punctuation",", "), (color,arg)])
ifarginkwonly_defaults:
markup.extend(
[
("punctuation","="),
("token",repr(kwonly_defaults[arg])),
]
)
ifvarkw:
ifargsorvarargsorkwonly:
markup.append(("punctuation",", "))
markup.append(("token","**"+varkw))
markup.append(("punctuation",")"))
widget_list.append(urwid.Text(markup))
ifself.matches_iter.matches:
attr_map= {}
focus_map= {"main":"operator"}
texts= [
urwid.AttrMap(
urwid.Text(("main",match)),attr_map,focus_map
)
formatchinself.matches_iter.matches
]
width=max(text.original_widget.pack()[0]fortextintexts)
gridflow=urwid.GridFlow(texts,width,1,0,"left")
widget_list.append(gridflow)
self.tooltip.grid=gridflow
self.overlay.tooltip_focus=False
else:
self.tooltip.grid=None
self.frame.body=self.overlay
else:
self.frame.body=self.listbox
self.tooltip.grid=None
ifself.docstring:
# TODO: use self.format_docstring? needs a width/height...
docstring=self.docstring
widget_list.append(urwid.Text(("comment",docstring)))
defreprint_line(self,lineno,tokens):
edit=self.edits[-len(self.buffer)+lineno-1]
edit.set_edit_markup(list(format_tokens(tokens)))
defgetstdout(self):
"""This method returns the 'spoofed' stdout buffer, for writing to a
file or sending to a pastebin or whatever."""
returnself.stdout_hist+"\n"
defask_confirmation(self,q):
"""Ask for yes or no and return boolean"""
try:
reply=self.statusbar.prompt(q)
exceptValueError:
returnFalse
returnreply.lower()in ("y","yes")
defreevaluate(self):
"""Clear the buffer, redraw the screen and re-evaluate the history"""
self.evaluating=True
self.stdout_hist=""
self.f_string=""
self.buffer= []
self.scr.erase()
# Set cursor position to -1 to prevent paren matching
self.cpos=-1
self.prompt(False)
self.iy,self.ix=self.scr.getyx()
forlineinself.history:
self.stdout_hist+=line+"\n"
self.print_line(line)
# I decided it was easier to just do this manually
# than to make the print_line and history stuff more flexible.
self.scr.addstr("\n")
more=self.push(line)
self.prompt(more)
self.iy,self.ix=self.scr.getyx()
self.cpos=0
indent=repl.next_indentation(self.s,self.config.tab_length)
self.s=""
self.scr.refresh()
ifself.buffer:
forunusedinrange(indent):
self.tab()
self.evaluating=False
# map(self.push, self.history)
# ^-- That's how simple this method was at first :(
defwrite(self,s):
"""For overriding stdout defaults"""
if"\x04"ins:
forblockins.split("\x04"):
self.write(block)
return
ifs.rstrip()and"\x03"ins:
t=s.split("\x03")[1]
else:
t=s
ifnotself.stdout_hist:
self.stdout_hist=t
else:
self.stdout_hist+=t
self.echo(s)
defpush(self,s,insert_into_history=True):
# Restore the original SIGINT handler. This is needed to be able
# to break out of infinite loops. If the interpreter itself
# sees this it prints 'KeyboardInterrupt' and returns (good).
orig_handler=signal.getsignal(signal.SIGINT)
signal.signal(signal.SIGINT,signal.default_int_handler)
# Pretty blindly adapted from bpython.cli
try:
returnsuper().push(s,insert_into_history)
exceptSystemExitase:
self.exit_value=e.args
raiseurwid.ExitMainLoop()
exceptKeyboardInterrupt:
# KeyboardInterrupt happened between the except block around
# user code execution and this code. This should be rare,
# but make sure to not kill bpython here, so leaning on
# ctrl+c to kill buggy code running inside bpython is safe.
self.keyboard_interrupt()
finally:
signal.signal(signal.SIGINT,orig_handler)
defstart(self):
self.prompt(False)
defkeyboard_interrupt(self):
# If the user is currently editing, interrupt him. This
# mirrors what the regular python REPL does.
ifself.editisnotNone:
# XXX this is a lot of code, and I am not sure it is
# actually enough code. Needs some testing.
self.edit.make_readonly()
self.edit=None
self.buffer= []
self.echo("KeyboardInterrupt")
self.prompt(False)
else:
# I do not quite remember if this is reachable, but let's
# be safe.
self.echo("KeyboardInterrupt")
defprompt(self,more):
# Clear current output here, or output resulting from the
# current prompt run will end up appended to the edit widget
# sitting above this prompt:
self.current_output=None
# XXX is this the right place?
self.rl_history.reset()
# We need the caption to use unicode as urwid normalizes later
# input to be the same type, using ascii as encoding. If the
# caption is bytes this breaks typing non-ascii into bpython.
ifnotmore:
caption= ("prompt",self.ps1)
self.stdout_hist+=self.ps1
else:
caption= ("prompt_more",self.ps2)
self.stdout_hist+=self.ps2
self.edit=BPythonEdit(self.config,caption=caption)
urwid.connect_signal(self.edit,"change",self.on_input_change)
urwid.connect_signal(
self.edit,"edit-pos-changed",self.on_edit_pos_changed
)
# Do this after connecting the change signal handler:
self.edit.insert_text(4*self.next_indentation()*" ")
self.edits.append(self.edit)
self.listbox.body.append(self.edit)
self.listbox.set_focus(len(self.listbox.body)-1)
# Hide the tooltip
self.frame.body=self.listbox
defon_input_change(self,edit,text):
# TODO: we get very confused here if "text" contains newlines,
# so we cannot put our edit widget in multiline mode yet.
# That is probably fixable...
tokens=self.tokenize(text,False)
edit.set_edit_markup(list(format_tokens(tokens)))
ifnotself._completion_update_suppressed:
# If we call this synchronously the get_edit_text() in repl.cw
# still returns the old text...
self.main_loop.set_alarm_in(
0,lambda*args:self._populate_completion()
)
defon_edit_pos_changed(self,edit,position):
"""Gets called when the cursor position inside the edit changed.
Rehighlight the current line because there might be a paren under
the cursor now."""
tokens=self.tokenize(self.current_line,False)
edit.set_edit_markup(list(format_tokens(tokens)))
defhandle_input(self,event):
# Since most of the input handling here should be handled in the edit
# instead, we return here early if the edit doesn't have the focus.
ifself.frame.get_focus()!="body":
return
ifevent=="enter":
inp=self.edit.get_edit_text()
self.history.append(inp)
self.edit.make_readonly()
self.stdout_hist+=inp
self.stdout_hist+="\n"
self.edit=None
# This may take a while, so force a redraw first:
self.main_loop.draw_screen()
more=self.push(inp)