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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 re
import string
import tabnanny
import tokenize
import tkMessageBox
IDENTCHARS = string.ascii_letters + string.digits + "_"
indent_message = """Error: Inconsistent indentation detected!
This means that either:
1) your indentation is outright incorrect (easy to fix), or
2) your indentation mixes tabs and spaces in a way that depends on \
how many spaces a tab is worth.
To fix case 2, change all tabs to spaces by using Select All followed \
by Untabify Region (both in the Edit menu)."""
# XXX 11Jun02 KBK TBD Implement stop-execution
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.flist.root
def check_module_event(self, event):
filename = self.getfilename()
if not filename:
return
if not self.tabnanny(filename):
return
self.checksyntax(filename)
def tabnanny(self, filename):
f = open(filename, 'r')
try:
tabnanny.process_tokens(tokenize.generate_tokens(f.readline))
except tokenize.TokenError, msg:
self.errorbox("Token error", "Token error:\n%s" % msg)
return False
except tabnanny.NannyNag, 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):
f = open(filename, 'r')
source = f.read()
f.close()
if '\r' in source:
source = re.sub(r"\r\n", "\n", source)
if source and source[-1] != '\n':
source = source + '\n'
try:
# If successful, return the compiled code
return compile(source, filename, "exec")
except (SyntaxError, OverflowError), err:
try:
msg, (errorfilename, lineno, offset, line) = err
if not errorfilename:
err.args = msg, (filename, lineno, offset, line)
err.filename = filename
self.colorize_syntax_error(msg, lineno, offset)
except:
msg = "*** " + str(err)
self.errorbox("Syntax error",
"There's an error in your program:\n" + msg)
return False
def colorize_syntax_error(self, msg, lineno, offset):
text = self.editwin.text
pos = "0.0 + %d lines + %d chars" % (lineno-1, offset-1)
text.tag_add("ERROR", pos)
char = text.get(pos)
if char and char in IDENTCHARS:
text.tag_add("ERROR", pos + " wordstart", pos)
if '\n' == text.get(pos): # error at line end
text.mark_set("insert", pos)
else:
text.mark_set("insert", pos + "+1c")
text.see(pos)
def run_module_event(self, event):
"Check syntax, if ok run the module in the shell top level"
filename = self.getfilename()
if not filename:
return
code = self.checksyntax(filename)
if not code:
return
flist = self.editwin.flist
shell = flist.open_shell()
interp = shell.interp
interp.restart_subprocess()
# XXX Too often this discards arguments the user just set...
interp.runcommand("""if 1:
_filename = %s
import sys as _sys
from os.path import basename as _basename
if (not _sys.argv or
_basename(_sys.argv[0]) != _basename(_filename)):
_sys.argv = [_filename]
del _filename, _sys, _basename
\n""" % `filename`)
interp.runcode(code)
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 not self.editwin.get_saved():
msg = """Source Must Be Saved
OK to Save?"""
mb = tkMessageBox.Message(
title="Save Before Run or Check",
message=msg,
icon=tkMessageBox.QUESTION,
type=tkMessageBox.OKCANCEL,
default=tkMessageBox.OK,
master=self.editwin.text)
reply = mb.show()
if reply == "ok":
self.editwin.io.save(None)
else:
return None
# filename is None if file doesn't exist
filename = self.editwin.io.filename
self.editwin.text.focus_set()
return filename
def errorbox(self, title, message):
# XXX This should really be a function of EditorWindow...
tkMessageBox.showerror(title, message, master=self.editwin.text)
self.editwin.text.focus_set()
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