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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.
"""
import
sys
import
os
import
time
import
locale
import
signal
import
urwid
from
typing
import
Optional
from
.
import
args
as
bpargs
,
repl
,
translations
from
.
formatter
import
theme_map
from
.
translations
import
_
from
.
keys
import
urwid_key_dispatch
as
key_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
:
from
twisted
.
internet
import
protocol
from
twisted
.
protocols
import
basic
except
ImportError
:
pass
else
:
class
EvalProtocol
(
basic
.
LineOnlyReceiver
):
delimiter
=
"
\n
"
def
__init__
(
self
,
myrepl
)
->
None
:
self
.
repl
=
myrepl
def
lineReceived
(
self
,
line
)
->
None
:
# HACK!
# TODO: deal with encoding issues here...
self
.
repl
.
main_loop
.
process_input
(
line
)
self
.
repl
.
main_loop
.
process_input
([
"enter"
])
class
EvalFactory
(
protocol
.
ServerFactory
):
def
__init__
(
self
,
myrepl
):
self
.
repl
=
myrepl
def
buildProtocol
(
self
,
addr
):
return
EvalProtocol
(
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.
if
urwid
.
VERSION
<
(
1
,
0
,
0
)
and
hasattr
(
urwid
,
"TwistedEventLoop"
):
class
TwistedEventLoop
(
urwid
.
TwistedEventLoop
):
"""TwistedEventLoop modified to properly stop the reactor.
urwid 0.9.9 and 0.9.9.1 crash the reactor on ExitMainLoop instead
of stopping it. One obvious way this breaks is if anything used
the reactor's thread pool: that thread pool is not shut down if
the reactor is not stopped, which means python hangs on exit
(joining the non-daemon threadpool threads that never exit). And
the default resolver is the ThreadedResolver, so if we looked up
any names we hang on exit. That is bad enough that we hack up
urwid a bit here to exit properly.
"""
def
handle_exit
(
self
,
f
):
def
wrapper
(
*
args
,
**
kwargs
):
try
:
return
f
(
*
args
,
**
kwargs
)
except
urwid
.
ExitMainLoop
:
# This is our change.
self
.
reactor
.
stop
()
except
:
# This is the same as in urwid.
# We are obviously not supposed to ever hit this.
print
(
sys
.
exc_info
())
self
.
_exc_info
=
sys
.
exc_info
()
self
.
reactor
.
crash
()
return
wrapper
else
:
TwistedEventLoop
=
getattr
(
urwid
,
"TwistedEventLoop"
,
None
)
class
StatusbarEdit
(
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
)
def
keypress
(
self
,
size
,
key
):
if
self
.
single
:
urwid
.
emit_signal
(
self
,
"prompt_enter"
,
self
,
key
)
elif
key
==
"enter"
:
urwid
.
emit_signal
(
self
,
"prompt_enter"
,
self
,
self
.
get_edit_text
())
else
:
return
super
().
keypress
(
size
,
key
)
urwid
.
register_signal
(
StatusbarEdit
,
"prompt_enter"
)
class
Statusbar
:
"""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
=
s
or
""
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
)
def
message
(
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."""
if
self
.
timer
is
not
None
:
self
.
main_loop
.
remove_alarm
(
self
.
timer
)
self
.
timer
=
None
def
prompt
(
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"
,
s
or
"?"
))
self
.
edit
.
set_edit_text
(
""
)
# hide the text and display the edit widget
if
self
.
edit
not
in
self
.
widget
.
widget_list
:
self
.
widget
.
widget_list
.
append
(
self
.
edit
)
if
self
.
text
in
self
.
widget
.
widget_list
:
self
.
widget
.
widget_list
.
remove
(
self
.
text
)
self
.
widget
.
set_focus_column
(
0
)
def
settext
(
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
if
self
.
edit
in
self
.
widget
.
widget_list
:
self
.
widget
.
widget_list
.
remove
(
self
.
edit
)
if
self
.
text
not
in
self
.
widget
.
widget_list
:
self
.
widget
.
widget_list
.
append
(
self
.
text
)
self
.
text
.
set_text
((
"main"
,
s
))
if
permanent
:
self
.
s
=
s
def
clear
(
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"
)
def
decoding_input_filter
(
keys
,
raw
):
"""Input filter for urwid which decodes each key with the locale's
preferred encoding.'"""
encoding
=
locale
.
getpreferredencoding
()
converted_keys
=
list
()
for
key
in
keys
:
if
isinstance
(
key
,
str
):
converted_keys
.
append
(
key
.
decode
(
encoding
))
else
:
converted_keys
.
append
(
key
)
return
converted_keys
def
format_tokens
(
tokensource
):
for
token
,
text
in
tokensource
:
if
text
==
"
\n
"
:
continue
# TODO: something about inversing Parenthesis
while
token
not
in
theme_map
:
token
=
token
.
parent
yield
(
theme_map
[
token
],
text
)
class
BPythonEdit
(
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
)
def
set_edit_pos
(
self
,
pos
):
super
().
set_edit_pos
(
pos
)
self
.
_emit
(
"edit-pos-changed"
,
self
.
edit_pos
)
def
get_edit_pos
(
self
):
return
self
.
_edit_pos
edit_pos
=
property
(
get_edit_pos
,
set_edit_pos
)
def
make_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
()
def
set_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.
"""
if
markup
:
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
()
def
get_text
(
self
):
return
self
.
_caption
+
self
.
_bpy_text
,
self
.
_attrib
+
self
.
_bpy_attr
def
selectable
(
self
):
return
self
.
_bpy_selectable
def
get_cursor_coords
(
self
,
*
args
,
**
kwargs
):
# urwid gets confused if a nonselectable widget has a cursor position.
if
not
self
.
_bpy_selectable
:
return
None
return
super
().
get_cursor_coords
(
*
args
,
**
kwargs
)
def
render
(
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)
if
not
self
.
_bpy_selectable
:
focus
=
False
return
super
().
render
(
size
,
focus
=
focus
)
def
get_pref_col
(
self
,
size
):
# Need to make this deal with us being nonselectable
if
not
self
.
_bpy_selectable
:
return
"left"
return
super
().
get_pref_col
(
size
)
def
move_cursor_to_coords
(
self
,
*
args
):
if
self
.
_bpy_may_move_cursor
:
return
super
().
move_cursor_to_coords
(
*
args
)
return
False
def
keypress
(
self
,
size
,
key
):
if
urwid
.
command_map
[
key
]
in
(
"cursor up"
,
"cursor down"
):
# Do not handle up/down arrow, leave them for the repl.
return
key
self
.
_bpy_may_move_cursor
=
True
try
:
if
urwid
.
command_map
[
key
]
==
"cursor max left"
:
self
.
edit_pos
=
0
elif
urwid
.
command_map
[
key
]
==
"cursor max right"
:
self
.
edit_pos
=
len
(
self
.
get_edit_text
())
elif
urwid
.
command_map
[
key
]
==
"clear word"
:
# ^w
if
self
.
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
)
if
np
==
-
1
:
line
=
line
[
p
:]
np
=
0
else
:
line
=
line
[:
np
]
+
line
[
p
:]
self
.
set_edit_text
(
line
)
self
.
edit_pos
=
np
elif
urwid
.
command_map
[
key
]
==
"clear line"
:
line
=
self
.
get_edit_text
()
self
.
set_edit_text
(
line
[
self
.
edit_pos
:])
self
.
edit_pos
=
0
elif
key
==
"backspace"
:
line
=
self
.
get_edit_text
()
cpos
=
len
(
line
)
-
self
.
edit_pos
if
not
(
cpos
or
len
(
line
)
%
self
.
tab_length
or
line
.
strip
()):
self
.
set_edit_text
(
line
[:
-
self
.
tab_length
])
else
:
return
super
().
keypress
(
size
,
key
)
else
:
# TODO: Add in specific keypress fetching code here
return
super
().
keypress
(
size
,
key
)
return
None
finally
:
self
.
_bpy_may_move_cursor
=
False
def
mouse_event
(
self
,
*
args
):
self
.
_bpy_may_move_cursor
=
True
try
:
return
super
().
mouse_event
(
*
args
)
finally
:
self
.
_bpy_may_move_cursor
=
False
class
BPythonListBox
(
urwid
.
ListBox
):
"""Like `urwid.ListBox`, except that it does not eat up and
down keys.
"""
def
keypress
(
self
,
size
,
key
):
if
key
not
in
(
"up"
,
"down"
):
return
urwid
.
ListBox
.
keypress
(
self
,
size
,
key
)
return
key
class
Tooltip
(
urwid
.
BoxWidget
):
"""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.
"""
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
def
selectable
(
self
):
return
self
.
bottom_w
.
selectable
()
def
keypress
(
self
,
size
,
key
):
return
self
.
bottom_w
.
keypress
(
size
,
key
)
def
mouse_event
(
self
,
size
,
event
,
button
,
col
,
row
,
focus
):
# TODO: pass to top widget if visible and inside it.
if
not
hasattr
(
self
.
bottom_w
,
"mouse_event"
):
return
False
return
self
.
bottom_w
.
mouse_event
(
size
,
event
,
button
,
col
,
row
,
focus
)
def
get_cursor_coords
(
self
,
size
):
return
self
.
bottom_w
.
get_cursor_coords
(
size
)
def
render
(
self
,
size
,
focus
=
False
):
maxcol
,
maxrow
=
size
bottom_c
=
self
.
bottom_w
.
render
(
size
,
focus
)
cursor
=
bottom_c
.
cursor
if
not
cursor
:
# Hide the tooltip if there is no cursor.
return
bottom_c
cursor_x
,
cursor_y
=
cursor
if
cursor_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"
in
self
.
listbox
.
ends_visible
((
maxcol
-
2
,
rows
-
3
)):
rows
-=
1
# If we're displaying above the cursor move the top edge down:
if
not
y
:
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
),
focus
and
self
.
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
return
canvas
class
URWIDInteraction
(
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
def
confirm
(
self
,
q
,
callback
):
"""Ask for yes or no and call callback to return the result"""
def
callback_wrapper
(
result
):
callback
(
result
.
lower
()
in
(
_
(
"y"
),
_
(
"yes"
)))
self
.
prompt
(
q
,
callback_wrapper
,
single
=
True
)
def
notify
(
self
,
s
,
n
=
10
,
wait_for_keypress
=
False
):
return
self
.
statusbar
.
message
(
s
,
n
)
def
prompt
(
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."""
if
self
.
callback
is
not
None
:
raise
Exception
(
"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"
)
if
self
.
callback
is
not
None
:
# The callback might want to start another prompt, so reset it
# before calling the callback.
callback
=
self
.
callback
self
.
callback
=
None
callback
(
text
)
def
file_prompt
(
self
,
s
:
str
)
->
Optional
[
str
]:
raise
NotImplementedError
class
URWIDRepl
(
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
)
if
urwid
.
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
def
echo
(
self
,
orig_s
):
s
=
orig_s
.
rstrip
(
"
\n
"
)
if
s
:
if
self
.
current_output
is
None
:
self
.
current_output
=
urwid
.
Text
((
"output"
,
s
))
if
self
.
edit
is
None
:
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
)
)
if
orig_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.
if
self
.
_redraw_handle
is
None
:
self
.
main_loop
.
draw_screen
()
def
maybe_redraw
(
loop
,
self
):
if
self
.
_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
()
if
now
-
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
):
if
self
.
edit
is
None
:
return
""
return
self
.
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)."
,
)
def
cw
(
self
):
"""Return the current word (incomplete word left of cursor)."""
if
self
.
edit
is
None
:
return
pos
=
self
.
edit
.
edit_pos
text
=
self
.
edit
.
get_edit_text
()
if
pos
!=
len
(
text
):
# Disable autocomplete if not at end of line, like cli does.
return
# Stolen from cli. TODO: clean up and split out.
if
not
text
or
(
not
text
[
-
1
].
isalnum
()
and
text
[
-
1
]
not
in
(
"."
,
"_"
)):
return
# Seek backwards in text for the first non-identifier char:
for
i
,
c
in
enumerate
(
reversed
(
text
)):
if
not
c
.
isalnum
()
and
c
not
in
(
"."
,
"_"
):
break
else
:
# No non-identifiers, return everything.
return
text
# Return everything to the right of the non-identifier.
return
text
[
-
i
:]
@
property
def
cpos
(
self
):
if
self
.
edit
is
not
None
:
return
len
(
self
.
current_line
)
-
self
.
edit
.
edit_pos
return
0
def
_get_cursor_offset
(
self
):
return
self
.
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
while
widget_list
:
widget_list
.
pop
()
# This is just me flailing around wildly. TODO: actually write.
if
self
.
complete
():
if
self
.
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_defaults
or
{}
markup
=
[(
"bold name"
,
func_name
), (
"name"
,
": ("
)]
# the isinstance checks if we're in a positional arg
# (instead of a keyword arg), I think
if
is_bound
and
isinstance
(
in_arg
,
int
):
in_arg
+=
1
# bpython.cli checks if this goes off the edge and
# does clever wrapping. I do not (yet).
for
k
,
i
in
enumerate
(
args
):
if
defaults
and
k
+
1
>
len
(
args
)
-
len
(
defaults
):
kw
=
repr
(
defaults
[
k
-
(
len
(
args
)
-
len
(
defaults
))])
else
:
kw
=
None
if
not
k
and
str
(
i
)
==
"self"
:
color
=
"name"
else
:
color
=
"token"
if
k
==
in_arg
or
i
==
in_arg
:
color
=
"bold "
+
color
markup
.
append
((
color
,
str
(
i
)))
if
kw
is
not
None
:
markup
.
extend
([(
"punctuation"
,
"="
), (
"token"
,
kw
)])
if
k
!=
len
(
args
)
-
1
:
markup
.
append
((
"punctuation"
,
", "
))
if
varargs
:
if
args
:
markup
.
append
((
"punctuation"
,
", "
))
markup
.
append
((
"token"
,
"*"
+
varargs
))
if
kwonly
:
if
not
varargs
:
if
args
:
markup
.
append
((
"punctuation"
,
", "
))
markup
.
append
((
"punctuation"
,
"*"
))
for
arg
in
kwonly
:
if
arg
==
in_arg
:
color
=
"bold token"
else
:
color
=
"token"
markup
.
extend
([(
"punctuation"
,
", "
), (
color
,
arg
)])
if
arg
in
kwonly_defaults
:
markup
.
extend
(
[
(
"punctuation"
,
"="
),
(
"token"
,
repr
(
kwonly_defaults
[
arg
])),
]
)
if
varkw
:
if
args
or
varargs
or
kwonly
:
markup
.
append
((
"punctuation"
,
", "
))
markup
.
append
((
"token"
,
"**"
+
varkw
))
markup
.
append
((
"punctuation"
,
")"
))
widget_list
.
append
(
urwid
.
Text
(
markup
))
if
self
.
matches_iter
.
matches
:
attr_map
=
{}
focus_map
=
{
"main"
:
"operator"
}
texts
=
[
urwid
.
AttrMap
(
urwid
.
Text
((
"main"
,
match
)),
attr_map
,
focus_map
)
for
match
in
self
.
matches_iter
.
matches
]
width
=
max
(
text
.
original_widget
.
pack
()[
0
]
for
text
in
texts
)
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
if
self
.
docstring
:
# TODO: use self.format_docstring? needs a width/height...
docstring
=
self
.
docstring
widget_list
.
append
(
urwid
.
Text
((
"comment"
,
docstring
)))
def
reprint_line
(
self
,
lineno
,
tokens
):
edit
=
self
.
edits
[
-
len
(
self
.
buffer
)
+
lineno
-
1
]
edit
.
set_edit_markup
(
list
(
format_tokens
(
tokens
)))
def
getstdout
(
self
):
"""This method returns the 'spoofed' stdout buffer, for writing to a
file or sending to a pastebin or whatever."""
return
self
.
stdout_hist
+
"
\n
"
def
ask_confirmation
(
self
,
q
):
"""Ask for yes or no and return boolean"""
try
:
reply
=
self
.
statusbar
.
prompt
(
q
)
except
ValueError
:
return
False
return
reply
.
lower
()
in
(
"y"
,
"yes"
)
def
reevaluate
(
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
()
for
line
in
self
.
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
()
if
self
.
buffer
:
for
unused
in
range
(
indent
):
self
.
tab
()
self
.
evaluating
=
False
# map(self.push, self.history)
# ^-- That's how simple this method was at first :(
def
write
(
self
,
s
):
"""For overriding stdout defaults"""
if
"
\x04
"
in
s
:
for
block
in
s
.
split
(
"
\x04
"
):
self
.
write
(
block
)
return
if
s
.
rstrip
()
and
"
\x03
"
in
s
:
t
=
s
.
split
(
"
\x03
"
)[
1
]
else
:
t
=
s
if
not
self
.
stdout_hist
:
self
.
stdout_hist
=
t
else
:
self
.
stdout_hist
+=
t
self
.
echo
(
s
)
def
push
(
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
:
return
super
().
push
(
s
,
insert_into_history
)
except
SystemExit
as
e
:
self
.
exit_value
=
e
.
args
raise
urwid
.
ExitMainLoop
()
except
KeyboardInterrupt
:
# 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
)
def
start
(
self
):
self
.
prompt
(
False
)
def
keyboard_interrupt
(
self
):
# If the user is currently editing, interrupt him. This
# mirrors what the regular python REPL does.
if
self
.
edit
is
not
None
:
# 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"
)
def
prompt
(
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.
if
not
more
:
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
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