vscode-python/pythonFiles/refactor.py at master · lightme16/vscode-python · GitHub

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# Arguments are:

# 1. Working directory.

# 2. Rope folder

import difflib

import io

import json

import os

import sys

import traceback

try:

import rope

from rope.base import libutils

from rope.refactor.rename import Rename

from rope.refactor.extract import ExtractMethod, ExtractVariable

import rope.base.project

import rope.base.taskhandle

except:

jsonMessage = {'error': True, 'message': 'Rope not installed', 'traceback': '', 'type': 'ModuleNotFoundError'}

sys.stderr.write(json.dumps(jsonMessage))

sys.stderr.flush()

WORKSPACE_ROOT = sys.argv[1]

ROPE_PROJECT_FOLDER = '.vscode/.ropeproject'

class RefactorProgress():

"""

Refactor progress information

"""

def __init__(self, name='Task Name', message=None, percent=0):

self.name = name

self.message = message

self.percent = percent

class ChangeType():

"""

Change Type Enum

"""

EDIT = 0

NEW = 1

DELETE = 2

class Change():

"""

EDIT = 0

NEW = 1

DELETE = 2

def __init__(self, filePath, fileMode=ChangeType.EDIT, diff=""):

self.filePath = filePath

self.diff = diff

self.fileMode = fileMode

def get_diff(changeset):

"""This is a copy of the code form the ChangeSet.get_description method found in Rope."""

new = changeset.new_contents

old = changeset.old_contents

if old is None:

if changeset.resource.exists():

old = changeset.resource.read()

else:

old = ''

# Ensure code has a trailing empty lines, before generating a diff.

# https://github.com/Microsoft/vscode-python/issues/695.

old_lines = old.splitlines(True)

if not old_lines[-1].endswith('\n'):

old_lines[-1] = old_lines[-1] + os.linesep

new = new + os.linesep

result = difflib.unified_diff(

old_lines, new.splitlines(True),

'a/' + changeset.resource.path, 'b/' + changeset.resource.path)

return ''.join(list(result))

class BaseRefactoring(object):

"""

Base class for refactorings

"""

def __init__(self, project, resource, name="Refactor", progressCallback=None):

self._progressCallback = progressCallback

self._handle = rope.base.taskhandle.TaskHandle(name)

self._handle.add_observer(self._update_progress)

self.project = project

self.resource = resource

self.changes = []

def _update_progress(self):

jobset = self._handle.current_jobset()

if jobset and not self._progressCallback is None:

progress = RefactorProgress()

# getting current job set name

if jobset.get_name() is not None:

progress.name = jobset.get_name()

# getting active job name

if jobset.get_active_job_name() is not None:

progress.message = jobset.get_active_job_name()

# adding done percent

percent = jobset.get_percent_done()

if percent is not None:

progress.percent = percent

if not self._progressCallback is None:

self._progressCallback(progress)

def stop(self):

self._handle.stop()

def refactor(self):

try:

self.onRefactor()

except rope.base.exceptions.InterruptedTaskError:

# we can ignore this exception, as user has cancelled refactoring

pass

def onRefactor(self):

"""

To be implemented by each base class

"""

pass

class RenameRefactor(BaseRefactoring):

def __init__(self, project, resource, name="Rename", progressCallback=None, startOffset=None, newName="new_Name"):

BaseRefactoring.__init__(self, project, resource,

name, progressCallback)

self._newName = newName

self.startOffset = startOffset

def onRefactor(self):

renamed = Rename(self.project, self.resource, self.startOffset)

changes = renamed.get_changes(self._newName, task_handle=self._handle)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item)))

else:

raise Exception('Unknown Change')

class ExtractVariableRefactor(BaseRefactoring):

def __init__(self, project, resource, name="Extract Variable", progressCallback=None, startOffset=None, endOffset=None, newName="new_Name", similar=False, global_=False):

BaseRefactoring.__init__(self, project, resource,

name, progressCallback)

self._newName = newName

self._startOffset = startOffset

self._endOffset = endOffset

self._similar = similar

self._global = global_

def onRefactor(self):

renamed = ExtractVariable(

self.project, self.resource, self._startOffset, self._endOffset)

changes = renamed.get_changes(

self._newName, self._similar, self._global)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item)))

else:

raise Exception('Unknown Change')

class ExtractMethodRefactor(ExtractVariableRefactor):

def __init__(self, project, resource, name="Extract Method", progressCallback=None, startOffset=None, endOffset=None, newName="new_Name", similar=False, global_=False):

ExtractVariableRefactor.__init__(self, project, resource,

name, progressCallback, startOffset=startOffset, endOffset=endOffset, newName=newName, similar=similar, global_=global_)

def onRefactor(self):

renamed = ExtractMethod(

self.project, self.resource, self._startOffset, self._endOffset)

changes = renamed.get_changes(

self._newName, self._similar, self._global)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item)))

else:

raise Exception('Unknown Change')

class RopeRefactoring(object):

def __init__(self):

self.default_sys_path = sys.path

self._input = io.open(sys.stdin.fileno(), encoding='utf-8')

def _rename(self, filePath, start, newName, indent_size):

"""

Renames a variable

"""

project = rope.base.project.Project(

WORKSPACE_ROOT, ropefolder=ROPE_PROJECT_FOLDER, save_history=False, indent_size=indent_size)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = RenameRefactor(

project, resourceToRefactor, startOffset=start, newName=newName)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({'diff': change.diff})

return valueToReturn

def _extractVariable(self, filePath, start, end, newName, indent_size):

"""

Extracts a variable

"""

project = rope.base.project.Project(

WORKSPACE_ROOT, ropefolder=ROPE_PROJECT_FOLDER, save_history=False, indent_size=indent_size)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = ExtractVariableRefactor(

project, resourceToRefactor, startOffset=start, endOffset=end, newName=newName, similar=True)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({'diff': change.diff})

return valueToReturn

def _extractMethod(self, filePath, start, end, newName, indent_size):

"""

Extracts a method

"""

project = rope.base.project.Project(

WORKSPACE_ROOT, ropefolder=ROPE_PROJECT_FOLDER, save_history=False, indent_size=indent_size)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = ExtractMethodRefactor(

project, resourceToRefactor, startOffset=start, endOffset=end, newName=newName, similar=True)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({'diff': change.diff})

return valueToReturn

def _serialize(self, identifier, results):

"""

Serializes the refactor results

"""

return json.dumps({'id': identifier, 'results': results})

def _deserialize(self, request):

"""Deserialize request from VSCode.

Args:

request: String with raw request from VSCode.

Returns:

Python dictionary with request data.

"""

return json.loads(request)

def _process_request(self, request):

"""Accept serialized request from VSCode and write response.

"""

request = self._deserialize(request)

lookup = request.get('lookup', '')

if lookup == '':

pass

elif lookup == 'rename':

changes = self._rename(request['file'], int(

request['start']), request['name'], int(request['indent_size']))

return self._write_response(self._serialize(request['id'], changes))

elif lookup == 'extract_variable':

changes = self._extractVariable(request['file'], int(

request['start']), int(request['end']), request['name'], int(request['indent_size']))

return self._write_response(self._serialize(request['id'], changes))

elif lookup == 'extract_method':

changes = self._extractMethod(request['file'], int(

request['start']), int(request['end']), request['name'], int(request['indent_size']))

return self._write_response(self._serialize(request['id'], changes))

def _write_response(self, response):

sys.stdout.write(response + '\n')

sys.stdout.flush()

def watch(self):

self._write_response("STARTED")

while True:

try:

self._process_request(self._input.readline())

except:

exc_type, exc_value, exc_tb = sys.exc_info()

tb_info = traceback.extract_tb(exc_tb)

jsonMessage = {'error': True, 'message': str(exc_value), 'traceback': str(tb_info), 'type': str(exc_type)}

sys.stderr.write(json.dumps(jsonMessage))

sys.stderr.flush()

if __name__ == '__main__':

RopeRefactoring().watch()

vscode-python/pythonFiles/refactor.py at master · lightme16/vscode-python · GitHub

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