"""Extension to execute code outside the Python shell window.
This adds the following commands (to the Edit menu, until there's a
separate Python menu):
- Check module (Alt-F5) does a full syntax check of the current module.
It also runs the tabnanny to catch any inconsistent tabs.
- Import module (F5) is equivalent to either import or reload of the
current module. The window must have been saved previously. The
module is added to sys.modules, and is also added to the __main__
namespace. Output goes to the shell window.
- Run module (Control-F5) does the same but executes the module's
code in the __main__ namespace.
"""
import sys
import os
import imp
import tkMessageBox
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)."""
class ScriptBinding:
keydefs = {
'<<check-module>>': ['<Alt-F5>', '<Meta-F5>'],
'<<import-module>>': ['<F5>'],
'<<run-script>>': ['<Control-F5>'],
}
menudefs = [
('edit', [None,
('Check module', '<<check-module>>'),
('Import module', '<<import-module>>'),
('Run script', '<<run-script>>'),
]
),
]
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
if not self.checksyntax(filename):
return
def tabnanny(self, filename):
import tabnanny
import tokenize
tabnanny.reset_globals()
f = open(filename, 'r')
try:
tokenize.tokenize(f.readline, tabnanny.tokeneater)
except tokenize.TokenError, msg:
self.errorbox("Token error",
"Token error:\n%s" % str(msg))
return 0
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 0
return 1
def checksyntax(self, filename):
f = open(filename, 'r')
source = f.read()
f.close()
if '\r' in source:
import re
source = re.sub(r"\r\n", "\n", source)
if source and source[-1] != '\n':
source = source + '\n'
try:
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
except:
lineno = None
msg = "*** " + str(err)
if lineno:
self.editwin.gotoline(lineno)
self.errorbox("Syntax error",
"There's an error in your program:\n" + msg)
return 1
def import_module_event(self, event):
filename = self.getfilename()
if not filename:
return
modname, ext = os.path.splitext(os.path.basename(filename))
if sys.modules.has_key(modname):
mod = sys.modules[modname]
else:
mod = imp.new_module(modname)
sys.modules[modname] = mod
mod.__file__ = filename
setattr(sys.modules['__main__'], modname, mod)
dir = os.path.dirname(filename)
dir = os.path.normpath(os.path.abspath(dir))
if dir not in sys.path:
sys.path.insert(0, dir)
flist = self.editwin.flist
shell = flist.open_shell()
interp = shell.interp
interp.runcode("reload(%s)" % modname)
def run_script_event(self, event):
filename = self.getfilename()
if not filename:
return
flist = self.editwin.flist
shell = flist.open_shell()
interp = shell.interp
if (not sys.argv or
os.path.basename(sys.argv[0]) != os.path.basename(filename)):
# XXX Too often this discards arguments the user just set...
sys.argv = [filename]
interp.execfile(filename)
def getfilename(self):
# Logic to make sure we have a saved filename
# XXX Better logic would offer to save!
if not self.editwin.get_saved():
self.errorbox("Not saved",
"Please save first!")
self.editwin.text.focus_set()
return
filename = self.editwin.io.filename
if not filename:
self.errorbox("No file name",
"This window has no file name")
return
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()
|