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✏️ ScriptBinding.py
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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 re import string import tabnanny import tokenize import tkMessageBox from idlelib import PyShell from idlelib.configHandler import idleConf from idlelib import macosxSupport IDENTCHARS = string.ascii_letters + string.digits + "_" 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): f = open(filename, 'r') 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, 'r') as f: source = f.read() if '\r' in source: source = re.sub(r"\r\n", "\n", source) source = re.sub(r"\r", "\n", source) if source and source[-1] != '\n': source = source + '\n' text = self.editwin.text text.tag_remove("ERROR", "1.0", "end") try: try: # If successful, return the compiled code return compile(source, filename, "exec") except (SyntaxError, OverflowError, ValueError) as 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 finally: shell.set_warning_stream(saved_stream) 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): """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=code.co_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' 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). _run_module_event = run_module_event def run_module_event(self, event): self.editwin.text_frame.after(200, lambda: self.editwin.text_frame.event_generate('<<run-module-event-2>>')) 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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