cpython/Lib/idlelib/ScriptBinding.py at 3.5 · python/cpython · GitHub

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"""Extension to execute code outside the Python shell window.

This adds the following commands:

- Check module does a full syntax check of the current module.

It also runs the tabnanny to catch any inconsistent tabs.

- Run module executes the module's code in the __main__ namespace. The window

must have been saved previously. The module is added to sys.modules, and is

also added to the __main__ namespace.

XXX GvR Redesign this interface (yet again) as follows:

- Present a dialog box for ``Run Module''

- Allow specify command line arguments in the dialog box

"""

import os

import tabnanny

import tokenize

import tkinter.messagebox as tkMessageBox

from idlelib import PyShell

from idlelib.configHandler import idleConf

from idlelib import macosxSupport

indent_message = """Error: Inconsistent indentation detected!

1) Your indentation is outright incorrect (easy to fix), OR

2) Your indentation mixes tabs and spaces.

To fix case 2, change all tabs to spaces by using Edit->Select All followed \

by Format->Untabify Region and specify the number of columns used by each tab.

"""

class ScriptBinding:

menudefs = [

('run', [None,

('Check Module', '<<check-module>>'),

('Run Module', '<<run-module>>'), ]), ]

def __init__(self, editwin):

self.editwin = editwin

# Provide instance variables referenced by Debugger

# XXX This should be done differently

self.flist = self.editwin.flist

self.root = self.editwin.root

if macosxSupport.isCocoaTk():

self.editwin.text_frame.bind('<<run-module-event-2>>', self._run_module_event)

def check_module_event(self, event):

filename = self.getfilename()

if not filename:

return 'break'

if not self.checksyntax(filename):

return 'break'

if not self.tabnanny(filename):

return 'break'

def tabnanny(self, filename):

# XXX: tabnanny should work on binary files as well

with tokenize.open(filename) as f:

try:

tabnanny.process_tokens(tokenize.generate_tokens(f.readline))

except tokenize.TokenError as msg:

msgtxt, (lineno, start) = msg.args

self.editwin.gotoline(lineno)

self.errorbox("Tabnanny Tokenizing Error",

"Token Error: %s" % msgtxt)

return False

except tabnanny.NannyNag as nag:

# The error messages from tabnanny are too confusing...

self.editwin.gotoline(nag.get_lineno())

self.errorbox("Tab/space error", indent_message)

return False

return True

def checksyntax(self, filename):

self.shell = shell = self.flist.open_shell()

saved_stream = shell.get_warning_stream()

shell.set_warning_stream(shell.stderr)

with open(filename, 'rb') as f:

source = f.read()

if b'\r' in source:

source = source.replace(b'\r\n', b'\n')

source = source.replace(b'\r', b'\n')

if source and source[-1] != ord(b'\n'):

source = source + b'\n'

editwin = self.editwin

text = editwin.text

text.tag_remove("ERROR", "1.0", "end")

try:

# If successful, return the compiled code

return compile(source, filename, "exec")

except (SyntaxError, OverflowError, ValueError) as value:

msg = getattr(value, 'msg', '') or value or "<no detail available>"

lineno = getattr(value, 'lineno', '') or 1

offset = getattr(value, 'offset', '') or 0

if offset == 0:

lineno += 1 #mark end of offending line

pos = "0.0 + %d lines + %d chars" % (lineno-1, offset-1)

editwin.colorize_syntax_error(text, pos)

self.errorbox("SyntaxError", "%-20s" % msg)

return False

finally:

shell.set_warning_stream(saved_stream)

def run_module_event(self, event):

if macosxSupport.isCocoaTk():

# Tk-Cocoa in MacOSX is broken until at least

# Tk 8.5.9, and without this rather

# crude workaround IDLE would hang when a user

# tries to run a module using the keyboard shortcut

# (the menu item works fine).

self.editwin.text_frame.after(200,

lambda: self.editwin.text_frame.event_generate('<<run-module-event-2>>'))

return 'break'

else:

return self._run_module_event(event)

def _run_module_event(self, event):

"""Run the module after setting up the environment.

First check the syntax. If OK, make sure the shell is active and

then transfer the arguments, set the run environment's working

directory to the directory of the module being executed and also

add that directory to its sys.path if not already included.

"""

filename = self.getfilename()

if not filename:

return 'break'

code = self.checksyntax(filename)

if not code:

return 'break'

if not self.tabnanny(filename):

return 'break'

interp = self.shell.interp

if PyShell.use_subprocess:

interp.restart_subprocess(with_cwd=False, filename=

self.editwin._filename_to_unicode(filename))

dirname = os.path.dirname(filename)

# XXX Too often this discards arguments the user just set...

interp.runcommand("""if 1:

__file__ = {filename!r}

import sys as _sys

from os.path import basename as _basename

if (not _sys.argv or

_basename(_sys.argv[0]) != _basename(__file__)):

_sys.argv = [__file__]

import os as _os

_os.chdir({dirname!r})

del _sys, _basename, _os

\n""".format(filename=filename, dirname=dirname))

interp.prepend_syspath(filename)

# XXX KBK 03Jul04 When run w/o subprocess, runtime warnings still

# go to __stderr__. With subprocess, they go to the shell.

# Need to change streams in PyShell.ModifiedInterpreter.

interp.runcode(code)

return 'break'

def getfilename(self):

"""Get source filename. If not saved, offer to save (or create) file

The debugger requires a source file. Make sure there is one, and that

the current version of the source buffer has been saved. If the user

declines to save or cancels the Save As dialog, return None.

If the user has configured IDLE for Autosave, the file will be

silently saved if it already exists and is dirty.

"""

filename = self.editwin.io.filename

if not self.editwin.get_saved():

autosave = idleConf.GetOption('main', 'General',

'autosave', type='bool')

if autosave and filename:

self.editwin.io.save(None)

else:

confirm = self.ask_save_dialog()

self.editwin.text.focus_set()

if confirm:

self.editwin.io.save(None)

filename = self.editwin.io.filename

else:

filename = None

return filename

def ask_save_dialog(self):

msg = "Source Must Be Saved\n" + 5*' ' + "OK to Save?"

confirm = tkMessageBox.askokcancel(title="Save Before Run or Check",

message=msg,

default=tkMessageBox.OK,

parent=self.editwin.text)

return confirm

def errorbox(self, title, message):

# XXX This should really be a function of EditorWindow...

tkMessageBox.showerror(title, message, parent=self.editwin.text)

self.editwin.text.focus_set()

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