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bpython/bpython/line.py at 7f4abb2de9218603a352afac7fd82740504cd617 · bpython/bpython · GitHub
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"""Extracting and changing portions of the current line
All functions take cursor offset from the beginning of the line and the line of
Python code, and return None, or a tuple of the start index, end index, and the
word."""
from
itertools
import
chain
from
collections
import
namedtuple
from
typing
import
Optional
from
.
lazyre
import
LazyReCompile
LinePart
=
namedtuple
(
"LinePart"
, [
"start"
,
"stop"
,
"word"
])
current_word_re
=
LazyReCompile
(
r"(?<![)\]\w_.])"
r"([\w_][\w0-9._]*[(]?)"
)
def
current_word
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""the object.attribute.attribute just before or under the cursor"""
pos
=
cursor_offset
start
=
pos
end
=
pos
word
=
None
for
m
in
current_word_re
.
finditer
(
line
):
if
m
.
start
(
1
)
<
pos
and
m
.
end
(
1
)
>=
pos
:
start
=
m
.
start
(
1
)
end
=
m
.
end
(
1
)
word
=
m
.
group
(
1
)
if
word
is
None
:
return
None
return
LinePart
(
start
,
end
,
word
)
current_dict_key_re
=
LazyReCompile
(
r"""[\w_][\w0-9._]*\[([\w0-9._(), '"]*)"""
)
def
current_dict_key
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in dictionary completion, return the current key"""
for
m
in
current_dict_key_re
.
finditer
(
line
):
if
m
.
start
(
1
)
<=
cursor_offset
and
m
.
end
(
1
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
current_dict_re
=
LazyReCompile
(
r"""([\w_][\w0-9._]*)\[([\w0-9._(), '"]*)"""
)
def
current_dict
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in dictionary completion, return the dict that should be used"""
for
m
in
current_dict_re
.
finditer
(
line
):
if
m
.
start
(
2
)
<=
cursor_offset
and
m
.
end
(
2
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
current_string_re
=
LazyReCompile
(
'''(?P<open>(?:""")|"|(?:''
\'
)|')(?:((?P<closed>.+?)(?P=open))|'''
"""(?P<unclosed>.+))"""
)
def
current_string
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If inside a string of nonzero length, return the string (excluding
quotes)
Weaker than bpython.Repl's current_string, because that checks that a
string is a string based on previous lines in the buffer."""
for
m
in
current_string_re
.
finditer
(
line
):
i
=
3
if
m
.
group
(
3
)
else
4
if
m
.
start
(
i
)
<=
cursor_offset
and
m
.
end
(
i
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
i
),
m
.
end
(
i
),
m
.
group
(
i
))
return
None
current_object_re
=
LazyReCompile
(
r"([\w_][\w0-9_]*)[.]"
)
def
current_object
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in attribute completion, the object on which attribute should be
looked up."""
match
=
current_word
(
cursor_offset
,
line
)
if
match
is
None
:
return
None
start
,
end
,
word
=
match
s
=
""
for
m
in
current_object_re
.
finditer
(
word
):
if
m
.
end
(
1
)
+
start
<
cursor_offset
:
if
s
:
s
+=
"."
s
+=
m
.
group
(
1
)
if
not
s
:
return
None
return
LinePart
(
start
,
start
+
len
(
s
),
s
)
current_object_attribute_re
=
LazyReCompile
(
r"([\w_][\w0-9_]*)[.]?"
)
def
current_object_attribute
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in attribute completion, the attribute being completed"""
# TODO replace with more general current_expression_attribute
match
=
current_word
(
cursor_offset
,
line
)
if
match
is
None
:
return
None
start
,
end
,
word
=
match
matches
=
current_object_attribute_re
.
finditer
(
word
)
next
(
matches
)
for
m
in
matches
:
if
(
m
.
start
(
1
)
+
start
<=
cursor_offset
and
m
.
end
(
1
)
+
start
>=
cursor_offset
):
return
LinePart
(
m
.
start
(
1
)
+
start
,
m
.
end
(
1
)
+
start
,
m
.
group
(
1
))
return
None
current_from_import_from_re
=
LazyReCompile
(
r"from +([\w0-9_.]*)(?:\s+import\s+([\w0-9_]+[,]?\s*)+)*"
)
def
current_from_import_from
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in from import completion, the word after from
returns None if cursor not in or just after one of the two interesting
parts of an import: from (module) import (name1, name2)
"""
# TODO allow for as's
for
m
in
current_from_import_from_re
.
finditer
(
line
):
if
(
m
.
start
(
1
)
<
cursor_offset
and
m
.
end
(
1
)
>=
cursor_offset
)
or
(
m
.
start
(
2
)
<
cursor_offset
and
m
.
end
(
2
)
>=
cursor_offset
):
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
current_from_import_import_re_1
=
LazyReCompile
(
r"from\s+([\w0-9_.]*)\s+import"
)
current_from_import_import_re_2
=
LazyReCompile
(
r"([\w0-9_]+)"
)
current_from_import_import_re_3
=
LazyReCompile
(
r", *([\w0-9_]*)"
)
def
current_from_import_import
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If in from import completion, the word after import being completed
returns None if cursor not in or just after one of these words
"""
baseline
=
current_from_import_import_re_1
.
search
(
line
)
if
baseline
is
None
:
return
None
match1
=
current_from_import_import_re_2
.
search
(
line
[
baseline
.
end
() :])
if
match1
is
None
:
return
None
for
m
in
chain
(
(
match1
,),
current_from_import_import_re_3
.
finditer
(
line
[
baseline
.
end
() :]),
):
start
=
baseline
.
end
()
+
m
.
start
(
1
)
end
=
baseline
.
end
()
+
m
.
end
(
1
)
if
start
<
cursor_offset
and
end
>=
cursor_offset
:
return
LinePart
(
start
,
end
,
m
.
group
(
1
))
return
None
current_import_re_1
=
LazyReCompile
(
r"import"
)
current_import_re_2
=
LazyReCompile
(
r"([\w0-9_.]+)"
)
current_import_re_3
=
LazyReCompile
(
r"[,][ ]*([\w0-9_.]*)"
)
def
current_import
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
# TODO allow for multiple as's
baseline
=
current_import_re_1
.
search
(
line
)
if
baseline
is
None
:
return
None
match1
=
current_import_re_2
.
search
(
line
[
baseline
.
end
() :])
if
match1
is
None
:
return
None
for
m
in
chain
(
(
match1
,),
current_import_re_3
.
finditer
(
line
[
baseline
.
end
() :])
):
start
=
baseline
.
end
()
+
m
.
start
(
1
)
end
=
baseline
.
end
()
+
m
.
end
(
1
)
if
start
<
cursor_offset
and
end
>=
cursor_offset
:
return
LinePart
(
start
,
end
,
m
.
group
(
1
))
return
None
current_method_definition_name_re
=
LazyReCompile
(
r"def\s+([a-zA-Z_][\w]*)"
)
def
current_method_definition_name
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""The name of a method being defined"""
for
m
in
current_method_definition_name_re
.
finditer
(
line
):
if
m
.
start
(
1
)
<=
cursor_offset
and
m
.
end
(
1
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
current_single_word_re
=
LazyReCompile
(
r"(?<![.])\b([a-zA-Z_][\w]*)"
)
def
current_single_word
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""the un-dotted word just before or under the cursor"""
for
m
in
current_single_word_re
.
finditer
(
line
):
if
m
.
start
(
1
)
<=
cursor_offset
and
m
.
end
(
1
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
def
current_dotted_attribute
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""The dotted attribute-object pair before the cursor"""
match
=
current_word
(
cursor_offset
,
line
)
if
match
is
None
:
return
None
start
,
end
,
word
=
match
if
"."
in
word
[
1
:]:
return
LinePart
(
start
,
end
,
word
)
return
None
current_expression_attribute_re
=
LazyReCompile
(
r"[.]\s*((?:[\w_][\w0-9_]*)|(?:))"
)
def
current_expression_attribute
(
cursor_offset
:
int
,
line
:
str
)
->
Optional
[
LinePart
]:
"""If after a dot, the attribute being completed"""
# TODO replace with more general current_expression_attribute
for
m
in
current_expression_attribute_re
.
finditer
(
line
):
if
m
.
start
(
1
)
<=
cursor_offset
and
m
.
end
(
1
)
>=
cursor_offset
:
return
LinePart
(
m
.
start
(
1
),
m
.
end
(
1
),
m
.
group
(
1
))
return
None
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