|
|
"""Adapters for IPython msg spec versions."""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
import json
|
|
|
|
|
|
from IPython.core.release import kernel_protocol_version_info
|
|
|
from IPython.utils.tokenutil import token_at_cursor
|
|
|
|
|
|
|
|
|
def code_to_line(code, cursor_pos):
|
|
|
"""Turn a multiline code block and cursor position into a single line
|
|
|
and new cursor position.
|
|
|
|
|
|
For adapting ``complete_`` and ``object_info_request``.
|
|
|
"""
|
|
|
if not code:
|
|
|
return "", 0
|
|
|
for line in code.splitlines(True):
|
|
|
n = len(line)
|
|
|
if cursor_pos > n:
|
|
|
cursor_pos -= n
|
|
|
else:
|
|
|
break
|
|
|
return line, cursor_pos
|
|
|
|
|
|
|
|
|
class Adapter(object):
|
|
|
"""Base class for adapting messages
|
|
|
|
|
|
Override message_type(msg) methods to create adapters.
|
|
|
"""
|
|
|
|
|
|
msg_type_map = {}
|
|
|
|
|
|
def update_header(self, msg):
|
|
|
return msg
|
|
|
|
|
|
def update_metadata(self, msg):
|
|
|
return msg
|
|
|
|
|
|
def update_msg_type(self, msg):
|
|
|
header = msg['header']
|
|
|
msg_type = header['msg_type']
|
|
|
if msg_type in self.msg_type_map:
|
|
|
msg['msg_type'] = header['msg_type'] = self.msg_type_map[msg_type]
|
|
|
return msg
|
|
|
|
|
|
def handle_reply_status_error(self, msg):
|
|
|
"""This will be called *instead of* the regular handler
|
|
|
|
|
|
on any reply with status != ok
|
|
|
"""
|
|
|
return msg
|
|
|
|
|
|
def __call__(self, msg):
|
|
|
msg = self.update_header(msg)
|
|
|
msg = self.update_metadata(msg)
|
|
|
msg = self.update_msg_type(msg)
|
|
|
header = msg['header']
|
|
|
|
|
|
handler = getattr(self, header['msg_type'], None)
|
|
|
if handler is None:
|
|
|
return msg
|
|
|
|
|
|
# handle status=error replies separately (no change, at present)
|
|
|
if msg['content'].get('status', None) in {'error', 'aborted'}:
|
|
|
return self.handle_reply_status_error(msg)
|
|
|
return handler(msg)
|
|
|
|
|
|
def _version_str_to_list(version):
|
|
|
"""convert a version string to a list of ints
|
|
|
|
|
|
non-int segments are excluded
|
|
|
"""
|
|
|
v = []
|
|
|
for part in version.split('.'):
|
|
|
try:
|
|
|
v.append(int(part))
|
|
|
except ValueError:
|
|
|
pass
|
|
|
return v
|
|
|
|
|
|
class V5toV4(Adapter):
|
|
|
"""Adapt msg protocol v5 to v4"""
|
|
|
|
|
|
version = '4.1'
|
|
|
|
|
|
msg_type_map = {
|
|
|
'execute_result' : 'pyout',
|
|
|
'execute_input' : 'pyin',
|
|
|
'error' : 'pyerr',
|
|
|
'inspect_request' : 'object_info_request',
|
|
|
'inspect_reply' : 'object_info_reply',
|
|
|
}
|
|
|
|
|
|
def update_header(self, msg):
|
|
|
msg['header'].pop('version', None)
|
|
|
return msg
|
|
|
|
|
|
# shell channel
|
|
|
|
|
|
def kernel_info_reply(self, msg):
|
|
|
content = msg['content']
|
|
|
content.pop('banner', None)
|
|
|
for key in ('language_version', 'protocol_version'):
|
|
|
if key in content:
|
|
|
content[key] = _version_str_to_list(content[key])
|
|
|
if content.pop('implementation', '') == 'ipython' \
|
|
|
and 'implementation_version' in content:
|
|
|
content['ipython_version'] = content.pop('implmentation_version')
|
|
|
content.pop('implementation_version', None)
|
|
|
content.setdefault("implmentation", content['language'])
|
|
|
return msg
|
|
|
|
|
|
def execute_request(self, msg):
|
|
|
content = msg['content']
|
|
|
content.setdefault('user_variables', [])
|
|
|
return msg
|
|
|
|
|
|
def execute_reply(self, msg):
|
|
|
content = msg['content']
|
|
|
content.setdefault('user_variables', {})
|
|
|
# TODO: handle payloads
|
|
|
return msg
|
|
|
|
|
|
def complete_request(self, msg):
|
|
|
content = msg['content']
|
|
|
code = content['code']
|
|
|
cursor_pos = content['cursor_pos']
|
|
|
line, cursor_pos = code_to_line(code, cursor_pos)
|
|
|
|
|
|
new_content = msg['content'] = {}
|
|
|
new_content['text'] = ''
|
|
|
new_content['line'] = line
|
|
|
new_content['block'] = None
|
|
|
new_content['cursor_pos'] = cursor_pos
|
|
|
return msg
|
|
|
|
|
|
def complete_reply(self, msg):
|
|
|
content = msg['content']
|
|
|
cursor_start = content.pop('cursor_start')
|
|
|
cursor_end = content.pop('cursor_end')
|
|
|
match_len = cursor_end - cursor_start
|
|
|
content['matched_text'] = content['matches'][0][:match_len]
|
|
|
content.pop('metadata', None)
|
|
|
return msg
|
|
|
|
|
|
def object_info_request(self, msg):
|
|
|
content = msg['content']
|
|
|
code = content['code']
|
|
|
cursor_pos = content['cursor_pos']
|
|
|
line, _ = code_to_line(code, cursor_pos)
|
|
|
|
|
|
new_content = msg['content'] = {}
|
|
|
new_content['oname'] = token_at_cursor(code, cursor_pos)
|
|
|
new_content['detail_level'] = content['detail_level']
|
|
|
return msg
|
|
|
|
|
|
def object_info_reply(self, msg):
|
|
|
"""inspect_reply can't be easily backward compatible"""
|
|
|
msg['content'] = {'found' : False, 'name' : 'unknown'}
|
|
|
return msg
|
|
|
|
|
|
# iopub channel
|
|
|
|
|
|
def stream(self, msg):
|
|
|
content = msg['content']
|
|
|
content['data'] = content.pop('text')
|
|
|
return msg
|
|
|
|
|
|
def display_data(self, msg):
|
|
|
content = msg['content']
|
|
|
content.setdefault("source", "display")
|
|
|
data = content['data']
|
|
|
if 'application/json' in data:
|
|
|
try:
|
|
|
data['application/json'] = json.dumps(data['application/json'])
|
|
|
except Exception:
|
|
|
# warn?
|
|
|
pass
|
|
|
return msg
|
|
|
|
|
|
# stdin channel
|
|
|
|
|
|
def input_request(self, msg):
|
|
|
msg['content'].pop('password', None)
|
|
|
return msg
|
|
|
|
|
|
|
|
|
class V4toV5(Adapter):
|
|
|
"""Convert msg spec V4 to V5"""
|
|
|
version = '5.0'
|
|
|
|
|
|
# invert message renames above
|
|
|
msg_type_map = {v:k for k,v in V5toV4.msg_type_map.items()}
|
|
|
|
|
|
def update_header(self, msg):
|
|
|
msg['header']['version'] = self.version
|
|
|
return msg
|
|
|
|
|
|
# shell channel
|
|
|
|
|
|
def kernel_info_reply(self, msg):
|
|
|
content = msg['content']
|
|
|
for key in ('language_version', 'protocol_version', 'ipython_version'):
|
|
|
if key in content:
|
|
|
content[key] = ".".join(map(str, content[key]))
|
|
|
|
|
|
if content['language'].startswith('python') and 'ipython_version' in content:
|
|
|
content['implementation'] = 'ipython'
|
|
|
content['implementation_version'] = content.pop('ipython_version')
|
|
|
|
|
|
content['banner'] = ''
|
|
|
return msg
|
|
|
|
|
|
def execute_request(self, msg):
|
|
|
content = msg['content']
|
|
|
user_variables = content.pop('user_variables', [])
|
|
|
user_expressions = content.setdefault('user_expressions', {})
|
|
|
for v in user_variables:
|
|
|
user_expressions[v] = v
|
|
|
return msg
|
|
|
|
|
|
def execute_reply(self, msg):
|
|
|
content = msg['content']
|
|
|
user_expressions = content.setdefault('user_expressions', {})
|
|
|
user_variables = content.pop('user_variables', {})
|
|
|
if user_variables:
|
|
|
user_expressions.update(user_variables)
|
|
|
|
|
|
# Pager payloads became a mime bundle
|
|
|
for payload in content.get('payload', []):
|
|
|
if payload.get('source', None) == 'page' and ('text' in payload):
|
|
|
if 'data' not in payload:
|
|
|
payload['data'] = {}
|
|
|
payload['data']['text/plain'] = payload.pop('text')
|
|
|
|
|
|
return msg
|
|
|
|
|
|
def complete_request(self, msg):
|
|
|
old_content = msg['content']
|
|
|
|
|
|
new_content = msg['content'] = {}
|
|
|
new_content['code'] = old_content['line']
|
|
|
new_content['cursor_pos'] = old_content['cursor_pos']
|
|
|
return msg
|
|
|
|
|
|
def complete_reply(self, msg):
|
|
|
# complete_reply needs more context than we have to get cursor_start and end.
|
|
|
# use special value of `-1` to indicate to frontend that it should be at
|
|
|
# the current cursor position.
|
|
|
content = msg['content']
|
|
|
new_content = msg['content'] = {'status' : 'ok'}
|
|
|
new_content['matches'] = content['matches']
|
|
|
new_content['cursor_start'] = -len(content['matched_text'])
|
|
|
new_content['cursor_end'] = None
|
|
|
new_content['metadata'] = {}
|
|
|
return msg
|
|
|
|
|
|
def inspect_request(self, msg):
|
|
|
content = msg['content']
|
|
|
name = content['oname']
|
|
|
|
|
|
new_content = msg['content'] = {}
|
|
|
new_content['code'] = name
|
|
|
new_content['cursor_pos'] = len(name)
|
|
|
new_content['detail_level'] = content['detail_level']
|
|
|
return msg
|
|
|
|
|
|
def inspect_reply(self, msg):
|
|
|
"""inspect_reply can't be easily backward compatible"""
|
|
|
content = msg['content']
|
|
|
new_content = msg['content'] = {'status' : 'ok'}
|
|
|
found = new_content['found'] = content['found']
|
|
|
new_content['name'] = content['name']
|
|
|
new_content['data'] = data = {}
|
|
|
new_content['metadata'] = {}
|
|
|
if found:
|
|
|
lines = []
|
|
|
for key in ('call_def', 'init_definition', 'definition'):
|
|
|
if content.get(key, False):
|
|
|
lines.append(content[key])
|
|
|
break
|
|
|
for key in ('call_docstring', 'init_docstring', 'docstring'):
|
|
|
if content.get(key, False):
|
|
|
lines.append(content[key])
|
|
|
break
|
|
|
if not lines:
|
|
|
lines.append("<empty docstring>")
|
|
|
data['text/plain'] = '\n'.join(lines)
|
|
|
return msg
|
|
|
|
|
|
# iopub channel
|
|
|
|
|
|
def stream(self, msg):
|
|
|
content = msg['content']
|
|
|
content['text'] = content.pop('data')
|
|
|
return msg
|
|
|
|
|
|
def display_data(self, msg):
|
|
|
content = msg['content']
|
|
|
content.pop("source", None)
|
|
|
data = content['data']
|
|
|
if 'application/json' in data:
|
|
|
try:
|
|
|
data['application/json'] = json.loads(data['application/json'])
|
|
|
except Exception:
|
|
|
# warn?
|
|
|
pass
|
|
|
return msg
|
|
|
|
|
|
# stdin channel
|
|
|
|
|
|
def input_request(self, msg):
|
|
|
msg['content'].setdefault('password', False)
|
|
|
return msg
|
|
|
|
|
|
|
|
|
|
|
|
def adapt(msg, to_version=kernel_protocol_version_info[0]):
|
|
|
"""Adapt a single message to a target version
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
msg : dict
|
|
|
An IPython message.
|
|
|
to_version : int, optional
|
|
|
The target major version.
|
|
|
If unspecified, adapt to the current version for IPython.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
|
|
|
msg : dict
|
|
|
An IPython message appropriate in the new version.
|
|
|
"""
|
|
|
header = msg['header']
|
|
|
if 'version' in header:
|
|
|
from_version = int(header['version'].split('.')[0])
|
|
|
else:
|
|
|
# assume last version before adding the key to the header
|
|
|
from_version = 4
|
|
|
adapter = adapters.get((from_version, to_version), None)
|
|
|
if adapter is None:
|
|
|
return msg
|
|
|
return adapter(msg)
|
|
|
|
|
|
|
|
|
# one adapter per major version from,to
|
|
|
adapters = {
|
|
|
(5,4) : V5toV4(),
|
|
|
(4,5) : V4toV5(),
|
|
|
}
|
|
|
|
