jpayne@69: #! /usr/bin/env python3
jpayne@69: 
jpayne@69: import sys
jpayne@69: if __name__ == "__main__":
jpayne@69:     sys.modules['idlelib.pyshell'] = sys.modules['__main__']
jpayne@69: 
jpayne@69: try:
jpayne@69:     from tkinter import *
jpayne@69: except ImportError:
jpayne@69:     print("** IDLE can't import Tkinter.\n"
jpayne@69:           "Your Python may not be configured for Tk. **", file=sys.__stderr__)
jpayne@69:     raise SystemExit(1)
jpayne@69: 
jpayne@69: # Valid arguments for the ...Awareness call below are defined in the following.
jpayne@69: # https://msdn.microsoft.com/en-us/library/windows/desktop/dn280512(v=vs.85).aspx
jpayne@69: if sys.platform == 'win32':
jpayne@69:     try:
jpayne@69:         import ctypes
jpayne@69:         PROCESS_SYSTEM_DPI_AWARE = 1
jpayne@69:         ctypes.OleDLL('shcore').SetProcessDpiAwareness(PROCESS_SYSTEM_DPI_AWARE)
jpayne@69:     except (ImportError, AttributeError, OSError):
jpayne@69:         pass
jpayne@69: 
jpayne@69: import tkinter.messagebox as tkMessageBox
jpayne@69: if TkVersion < 8.5:
jpayne@69:     root = Tk()  # otherwise create root in main
jpayne@69:     root.withdraw()
jpayne@69:     from idlelib.run import fix_scaling
jpayne@69:     fix_scaling(root)
jpayne@69:     tkMessageBox.showerror("Idle Cannot Start",
jpayne@69:             "Idle requires tcl/tk 8.5+, not %s." % TkVersion,
jpayne@69:             parent=root)
jpayne@69:     raise SystemExit(1)
jpayne@69: 
jpayne@69: from code import InteractiveInterpreter
jpayne@69: import linecache
jpayne@69: import os
jpayne@69: import os.path
jpayne@69: from platform import python_version
jpayne@69: import re
jpayne@69: import socket
jpayne@69: import subprocess
jpayne@69: from textwrap import TextWrapper
jpayne@69: import threading
jpayne@69: import time
jpayne@69: import tokenize
jpayne@69: import warnings
jpayne@69: 
jpayne@69: from idlelib.colorizer import ColorDelegator
jpayne@69: from idlelib.config import idleConf
jpayne@69: from idlelib import debugger
jpayne@69: from idlelib import debugger_r
jpayne@69: from idlelib.editor import EditorWindow, fixwordbreaks
jpayne@69: from idlelib.filelist import FileList
jpayne@69: from idlelib.outwin import OutputWindow
jpayne@69: from idlelib import rpc
jpayne@69: from idlelib.run import idle_formatwarning, StdInputFile, StdOutputFile
jpayne@69: from idlelib.undo import UndoDelegator
jpayne@69: 
jpayne@69: HOST = '127.0.0.1' # python execution server on localhost loopback
jpayne@69: PORT = 0  # someday pass in host, port for remote debug capability
jpayne@69: 
jpayne@69: # Override warnings module to write to warning_stream.  Initialize to send IDLE
jpayne@69: # internal warnings to the console.  ScriptBinding.check_syntax() will
jpayne@69: # temporarily redirect the stream to the shell window to display warnings when
jpayne@69: # checking user's code.
jpayne@69: warning_stream = sys.__stderr__  # None, at least on Windows, if no console.
jpayne@69: 
jpayne@69: def idle_showwarning(
jpayne@69:         message, category, filename, lineno, file=None, line=None):
jpayne@69:     """Show Idle-format warning (after replacing warnings.showwarning).
jpayne@69: 
jpayne@69:     The differences are the formatter called, the file=None replacement,
jpayne@69:     which can be None, the capture of the consequence AttributeError,
jpayne@69:     and the output of a hard-coded prompt.
jpayne@69:     """
jpayne@69:     if file is None:
jpayne@69:         file = warning_stream
jpayne@69:     try:
jpayne@69:         file.write(idle_formatwarning(
jpayne@69:                 message, category, filename, lineno, line=line))
jpayne@69:         file.write(">>> ")
jpayne@69:     except (AttributeError, OSError):
jpayne@69:         pass  # if file (probably __stderr__) is invalid, skip warning.
jpayne@69: 
jpayne@69: _warnings_showwarning = None
jpayne@69: 
jpayne@69: def capture_warnings(capture):
jpayne@69:     "Replace warning.showwarning with idle_showwarning, or reverse."
jpayne@69: 
jpayne@69:     global _warnings_showwarning
jpayne@69:     if capture:
jpayne@69:         if _warnings_showwarning is None:
jpayne@69:             _warnings_showwarning = warnings.showwarning
jpayne@69:             warnings.showwarning = idle_showwarning
jpayne@69:     else:
jpayne@69:         if _warnings_showwarning is not None:
jpayne@69:             warnings.showwarning = _warnings_showwarning
jpayne@69:             _warnings_showwarning = None
jpayne@69: 
jpayne@69: capture_warnings(True)
jpayne@69: 
jpayne@69: def extended_linecache_checkcache(filename=None,
jpayne@69:                                   orig_checkcache=linecache.checkcache):
jpayne@69:     """Extend linecache.checkcache to preserve the <pyshell#...> entries
jpayne@69: 
jpayne@69:     Rather than repeating the linecache code, patch it to save the
jpayne@69:     <pyshell#...> entries, call the original linecache.checkcache()
jpayne@69:     (skipping them), and then restore the saved entries.
jpayne@69: 
jpayne@69:     orig_checkcache is bound at definition time to the original
jpayne@69:     method, allowing it to be patched.
jpayne@69:     """
jpayne@69:     cache = linecache.cache
jpayne@69:     save = {}
jpayne@69:     for key in list(cache):
jpayne@69:         if key[:1] + key[-1:] == '<>':
jpayne@69:             save[key] = cache.pop(key)
jpayne@69:     orig_checkcache(filename)
jpayne@69:     cache.update(save)
jpayne@69: 
jpayne@69: # Patch linecache.checkcache():
jpayne@69: linecache.checkcache = extended_linecache_checkcache
jpayne@69: 
jpayne@69: 
jpayne@69: class PyShellEditorWindow(EditorWindow):
jpayne@69:     "Regular text edit window in IDLE, supports breakpoints"
jpayne@69: 
jpayne@69:     def __init__(self, *args):
jpayne@69:         self.breakpoints = []
jpayne@69:         EditorWindow.__init__(self, *args)
jpayne@69:         self.text.bind("<<set-breakpoint-here>>", self.set_breakpoint_here)
jpayne@69:         self.text.bind("<<clear-breakpoint-here>>", self.clear_breakpoint_here)
jpayne@69:         self.text.bind("<<open-python-shell>>", self.flist.open_shell)
jpayne@69: 
jpayne@69:         #TODO: don't read/write this from/to .idlerc when testing
jpayne@69:         self.breakpointPath = os.path.join(
jpayne@69:                 idleConf.userdir, 'breakpoints.lst')
jpayne@69:         # whenever a file is changed, restore breakpoints
jpayne@69:         def filename_changed_hook(old_hook=self.io.filename_change_hook,
jpayne@69:                                   self=self):
jpayne@69:             self.restore_file_breaks()
jpayne@69:             old_hook()
jpayne@69:         self.io.set_filename_change_hook(filename_changed_hook)
jpayne@69:         if self.io.filename:
jpayne@69:             self.restore_file_breaks()
jpayne@69:         self.color_breakpoint_text()
jpayne@69: 
jpayne@69:     rmenu_specs = [
jpayne@69:         ("Cut", "<<cut>>", "rmenu_check_cut"),
jpayne@69:         ("Copy", "<<copy>>", "rmenu_check_copy"),
jpayne@69:         ("Paste", "<<paste>>", "rmenu_check_paste"),
jpayne@69:         (None, None, None),
jpayne@69:         ("Set Breakpoint", "<<set-breakpoint-here>>", None),
jpayne@69:         ("Clear Breakpoint", "<<clear-breakpoint-here>>", None)
jpayne@69:     ]
jpayne@69: 
jpayne@69:     def color_breakpoint_text(self, color=True):
jpayne@69:         "Turn colorizing of breakpoint text on or off"
jpayne@69:         if self.io is None:
jpayne@69:             # possible due to update in restore_file_breaks
jpayne@69:             return
jpayne@69:         if color:
jpayne@69:             theme = idleConf.CurrentTheme()
jpayne@69:             cfg = idleConf.GetHighlight(theme, "break")
jpayne@69:         else:
jpayne@69:             cfg = {'foreground': '', 'background': ''}
jpayne@69:         self.text.tag_config('BREAK', cfg)
jpayne@69: 
jpayne@69:     def set_breakpoint(self, lineno):
jpayne@69:         text = self.text
jpayne@69:         filename = self.io.filename
jpayne@69:         text.tag_add("BREAK", "%d.0" % lineno, "%d.0" % (lineno+1))
jpayne@69:         try:
jpayne@69:             self.breakpoints.index(lineno)
jpayne@69:         except ValueError:  # only add if missing, i.e. do once
jpayne@69:             self.breakpoints.append(lineno)
jpayne@69:         try:    # update the subprocess debugger
jpayne@69:             debug = self.flist.pyshell.interp.debugger
jpayne@69:             debug.set_breakpoint_here(filename, lineno)
jpayne@69:         except: # but debugger may not be active right now....
jpayne@69:             pass
jpayne@69: 
jpayne@69:     def set_breakpoint_here(self, event=None):
jpayne@69:         text = self.text
jpayne@69:         filename = self.io.filename
jpayne@69:         if not filename:
jpayne@69:             text.bell()
jpayne@69:             return
jpayne@69:         lineno = int(float(text.index("insert")))
jpayne@69:         self.set_breakpoint(lineno)
jpayne@69: 
jpayne@69:     def clear_breakpoint_here(self, event=None):
jpayne@69:         text = self.text
jpayne@69:         filename = self.io.filename
jpayne@69:         if not filename:
jpayne@69:             text.bell()
jpayne@69:             return
jpayne@69:         lineno = int(float(text.index("insert")))
jpayne@69:         try:
jpayne@69:             self.breakpoints.remove(lineno)
jpayne@69:         except:
jpayne@69:             pass
jpayne@69:         text.tag_remove("BREAK", "insert linestart",\
jpayne@69:                         "insert lineend +1char")
jpayne@69:         try:
jpayne@69:             debug = self.flist.pyshell.interp.debugger
jpayne@69:             debug.clear_breakpoint_here(filename, lineno)
jpayne@69:         except:
jpayne@69:             pass
jpayne@69: 
jpayne@69:     def clear_file_breaks(self):
jpayne@69:         if self.breakpoints:
jpayne@69:             text = self.text
jpayne@69:             filename = self.io.filename
jpayne@69:             if not filename:
jpayne@69:                 text.bell()
jpayne@69:                 return
jpayne@69:             self.breakpoints = []
jpayne@69:             text.tag_remove("BREAK", "1.0", END)
jpayne@69:             try:
jpayne@69:                 debug = self.flist.pyshell.interp.debugger
jpayne@69:                 debug.clear_file_breaks(filename)
jpayne@69:             except:
jpayne@69:                 pass
jpayne@69: 
jpayne@69:     def store_file_breaks(self):
jpayne@69:         "Save breakpoints when file is saved"
jpayne@69:         # XXX 13 Dec 2002 KBK Currently the file must be saved before it can
jpayne@69:         #     be run.  The breaks are saved at that time.  If we introduce
jpayne@69:         #     a temporary file save feature the save breaks functionality
jpayne@69:         #     needs to be re-verified, since the breaks at the time the
jpayne@69:         #     temp file is created may differ from the breaks at the last
jpayne@69:         #     permanent save of the file.  Currently, a break introduced
jpayne@69:         #     after a save will be effective, but not persistent.
jpayne@69:         #     This is necessary to keep the saved breaks synched with the
jpayne@69:         #     saved file.
jpayne@69:         #
jpayne@69:         #     Breakpoints are set as tagged ranges in the text.
jpayne@69:         #     Since a modified file has to be saved before it is
jpayne@69:         #     run, and since self.breakpoints (from which the subprocess
jpayne@69:         #     debugger is loaded) is updated during the save, the visible
jpayne@69:         #     breaks stay synched with the subprocess even if one of these
jpayne@69:         #     unexpected breakpoint deletions occurs.
jpayne@69:         breaks = self.breakpoints
jpayne@69:         filename = self.io.filename
jpayne@69:         try:
jpayne@69:             with open(self.breakpointPath, "r") as fp:
jpayne@69:                 lines = fp.readlines()
jpayne@69:         except OSError:
jpayne@69:             lines = []
jpayne@69:         try:
jpayne@69:             with open(self.breakpointPath, "w") as new_file:
jpayne@69:                 for line in lines:
jpayne@69:                     if not line.startswith(filename + '='):
jpayne@69:                         new_file.write(line)
jpayne@69:                 self.update_breakpoints()
jpayne@69:                 breaks = self.breakpoints
jpayne@69:                 if breaks:
jpayne@69:                     new_file.write(filename + '=' + str(breaks) + '\n')
jpayne@69:         except OSError as err:
jpayne@69:             if not getattr(self.root, "breakpoint_error_displayed", False):
jpayne@69:                 self.root.breakpoint_error_displayed = True
jpayne@69:                 tkMessageBox.showerror(title='IDLE Error',
jpayne@69:                     message='Unable to update breakpoint list:\n%s'
jpayne@69:                         % str(err),
jpayne@69:                     parent=self.text)
jpayne@69: 
jpayne@69:     def restore_file_breaks(self):
jpayne@69:         self.text.update()   # this enables setting "BREAK" tags to be visible
jpayne@69:         if self.io is None:
jpayne@69:             # can happen if IDLE closes due to the .update() call
jpayne@69:             return
jpayne@69:         filename = self.io.filename
jpayne@69:         if filename is None:
jpayne@69:             return
jpayne@69:         if os.path.isfile(self.breakpointPath):
jpayne@69:             with open(self.breakpointPath, "r") as fp:
jpayne@69:                 lines = fp.readlines()
jpayne@69:             for line in lines:
jpayne@69:                 if line.startswith(filename + '='):
jpayne@69:                     breakpoint_linenumbers = eval(line[len(filename)+1:])
jpayne@69:                     for breakpoint_linenumber in breakpoint_linenumbers:
jpayne@69:                         self.set_breakpoint(breakpoint_linenumber)
jpayne@69: 
jpayne@69:     def update_breakpoints(self):
jpayne@69:         "Retrieves all the breakpoints in the current window"
jpayne@69:         text = self.text
jpayne@69:         ranges = text.tag_ranges("BREAK")
jpayne@69:         linenumber_list = self.ranges_to_linenumbers(ranges)
jpayne@69:         self.breakpoints = linenumber_list
jpayne@69: 
jpayne@69:     def ranges_to_linenumbers(self, ranges):
jpayne@69:         lines = []
jpayne@69:         for index in range(0, len(ranges), 2):
jpayne@69:             lineno = int(float(ranges[index].string))
jpayne@69:             end = int(float(ranges[index+1].string))
jpayne@69:             while lineno < end:
jpayne@69:                 lines.append(lineno)
jpayne@69:                 lineno += 1
jpayne@69:         return lines
jpayne@69: 
jpayne@69: # XXX 13 Dec 2002 KBK Not used currently
jpayne@69: #    def saved_change_hook(self):
jpayne@69: #        "Extend base method - clear breaks if module is modified"
jpayne@69: #        if not self.get_saved():
jpayne@69: #            self.clear_file_breaks()
jpayne@69: #        EditorWindow.saved_change_hook(self)
jpayne@69: 
jpayne@69:     def _close(self):
jpayne@69:         "Extend base method - clear breaks when module is closed"
jpayne@69:         self.clear_file_breaks()
jpayne@69:         EditorWindow._close(self)
jpayne@69: 
jpayne@69: 
jpayne@69: class PyShellFileList(FileList):
jpayne@69:     "Extend base class: IDLE supports a shell and breakpoints"
jpayne@69: 
jpayne@69:     # override FileList's class variable, instances return PyShellEditorWindow
jpayne@69:     # instead of EditorWindow when new edit windows are created.
jpayne@69:     EditorWindow = PyShellEditorWindow
jpayne@69: 
jpayne@69:     pyshell = None
jpayne@69: 
jpayne@69:     def open_shell(self, event=None):
jpayne@69:         if self.pyshell:
jpayne@69:             self.pyshell.top.wakeup()
jpayne@69:         else:
jpayne@69:             self.pyshell = PyShell(self)
jpayne@69:             if self.pyshell:
jpayne@69:                 if not self.pyshell.begin():
jpayne@69:                     return None
jpayne@69:         return self.pyshell
jpayne@69: 
jpayne@69: 
jpayne@69: class ModifiedColorDelegator(ColorDelegator):
jpayne@69:     "Extend base class: colorizer for the shell window itself"
jpayne@69: 
jpayne@69:     def __init__(self):
jpayne@69:         ColorDelegator.__init__(self)
jpayne@69:         self.LoadTagDefs()
jpayne@69: 
jpayne@69:     def recolorize_main(self):
jpayne@69:         self.tag_remove("TODO", "1.0", "iomark")
jpayne@69:         self.tag_add("SYNC", "1.0", "iomark")
jpayne@69:         ColorDelegator.recolorize_main(self)
jpayne@69: 
jpayne@69:     def LoadTagDefs(self):
jpayne@69:         ColorDelegator.LoadTagDefs(self)
jpayne@69:         theme = idleConf.CurrentTheme()
jpayne@69:         self.tagdefs.update({
jpayne@69:             "stdin": {'background':None,'foreground':None},
jpayne@69:             "stdout": idleConf.GetHighlight(theme, "stdout"),
jpayne@69:             "stderr": idleConf.GetHighlight(theme, "stderr"),
jpayne@69:             "console": idleConf.GetHighlight(theme, "console"),
jpayne@69:         })
jpayne@69: 
jpayne@69:     def removecolors(self):
jpayne@69:         # Don't remove shell color tags before "iomark"
jpayne@69:         for tag in self.tagdefs:
jpayne@69:             self.tag_remove(tag, "iomark", "end")
jpayne@69: 
jpayne@69: class ModifiedUndoDelegator(UndoDelegator):
jpayne@69:     "Extend base class: forbid insert/delete before the I/O mark"
jpayne@69: 
jpayne@69:     def insert(self, index, chars, tags=None):
jpayne@69:         try:
jpayne@69:             if self.delegate.compare(index, "<", "iomark"):
jpayne@69:                 self.delegate.bell()
jpayne@69:                 return
jpayne@69:         except TclError:
jpayne@69:             pass
jpayne@69:         UndoDelegator.insert(self, index, chars, tags)
jpayne@69: 
jpayne@69:     def delete(self, index1, index2=None):
jpayne@69:         try:
jpayne@69:             if self.delegate.compare(index1, "<", "iomark"):
jpayne@69:                 self.delegate.bell()
jpayne@69:                 return
jpayne@69:         except TclError:
jpayne@69:             pass
jpayne@69:         UndoDelegator.delete(self, index1, index2)
jpayne@69: 
jpayne@69: 
jpayne@69: class MyRPCClient(rpc.RPCClient):
jpayne@69: 
jpayne@69:     def handle_EOF(self):
jpayne@69:         "Override the base class - just re-raise EOFError"
jpayne@69:         raise EOFError
jpayne@69: 
jpayne@69: def restart_line(width, filename):  # See bpo-38141.
jpayne@69:     """Return width long restart line formatted with filename.
jpayne@69: 
jpayne@69:     Fill line with balanced '='s, with any extras and at least one at
jpayne@69:     the beginning.  Do not end with a trailing space.
jpayne@69:     """
jpayne@69:     tag = f"= RESTART: {filename or 'Shell'} ="
jpayne@69:     if width >= len(tag):
jpayne@69:         div, mod = divmod((width -len(tag)), 2)
jpayne@69:         return f"{(div+mod)*'='}{tag}{div*'='}"
jpayne@69:     else:
jpayne@69:         return tag[:-2]  # Remove ' ='.
jpayne@69: 
jpayne@69: 
jpayne@69: class ModifiedInterpreter(InteractiveInterpreter):
jpayne@69: 
jpayne@69:     def __init__(self, tkconsole):
jpayne@69:         self.tkconsole = tkconsole
jpayne@69:         locals = sys.modules['__main__'].__dict__
jpayne@69:         InteractiveInterpreter.__init__(self, locals=locals)
jpayne@69:         self.restarting = False
jpayne@69:         self.subprocess_arglist = None
jpayne@69:         self.port = PORT
jpayne@69:         self.original_compiler_flags = self.compile.compiler.flags
jpayne@69: 
jpayne@69:     _afterid = None
jpayne@69:     rpcclt = None
jpayne@69:     rpcsubproc = None
jpayne@69: 
jpayne@69:     def spawn_subprocess(self):
jpayne@69:         if self.subprocess_arglist is None:
jpayne@69:             self.subprocess_arglist = self.build_subprocess_arglist()
jpayne@69:         self.rpcsubproc = subprocess.Popen(self.subprocess_arglist)
jpayne@69: 
jpayne@69:     def build_subprocess_arglist(self):
jpayne@69:         assert (self.port!=0), (
jpayne@69:             "Socket should have been assigned a port number.")
jpayne@69:         w = ['-W' + s for s in sys.warnoptions]
jpayne@69:         # Maybe IDLE is installed and is being accessed via sys.path,
jpayne@69:         # or maybe it's not installed and the idle.py script is being
jpayne@69:         # run from the IDLE source directory.
jpayne@69:         del_exitf = idleConf.GetOption('main', 'General', 'delete-exitfunc',
jpayne@69:                                        default=False, type='bool')
jpayne@69:         command = "__import__('idlelib.run').run.main(%r)" % (del_exitf,)
jpayne@69:         return [sys.executable] + w + ["-c", command, str(self.port)]
jpayne@69: 
jpayne@69:     def start_subprocess(self):
jpayne@69:         addr = (HOST, self.port)
jpayne@69:         # GUI makes several attempts to acquire socket, listens for connection
jpayne@69:         for i in range(3):
jpayne@69:             time.sleep(i)
jpayne@69:             try:
jpayne@69:                 self.rpcclt = MyRPCClient(addr)
jpayne@69:                 break
jpayne@69:             except OSError:
jpayne@69:                 pass
jpayne@69:         else:
jpayne@69:             self.display_port_binding_error()
jpayne@69:             return None
jpayne@69:         # if PORT was 0, system will assign an 'ephemeral' port. Find it out:
jpayne@69:         self.port = self.rpcclt.listening_sock.getsockname()[1]
jpayne@69:         # if PORT was not 0, probably working with a remote execution server
jpayne@69:         if PORT != 0:
jpayne@69:             # To allow reconnection within the 2MSL wait (cf. Stevens TCP
jpayne@69:             # V1, 18.6),  set SO_REUSEADDR.  Note that this can be problematic
jpayne@69:             # on Windows since the implementation allows two active sockets on
jpayne@69:             # the same address!
jpayne@69:             self.rpcclt.listening_sock.setsockopt(socket.SOL_SOCKET,
jpayne@69:                                            socket.SO_REUSEADDR, 1)
jpayne@69:         self.spawn_subprocess()
jpayne@69:         #time.sleep(20) # test to simulate GUI not accepting connection
jpayne@69:         # Accept the connection from the Python execution server
jpayne@69:         self.rpcclt.listening_sock.settimeout(10)
jpayne@69:         try:
jpayne@69:             self.rpcclt.accept()
jpayne@69:         except socket.timeout:
jpayne@69:             self.display_no_subprocess_error()
jpayne@69:             return None
jpayne@69:         self.rpcclt.register("console", self.tkconsole)
jpayne@69:         self.rpcclt.register("stdin", self.tkconsole.stdin)
jpayne@69:         self.rpcclt.register("stdout", self.tkconsole.stdout)
jpayne@69:         self.rpcclt.register("stderr", self.tkconsole.stderr)
jpayne@69:         self.rpcclt.register("flist", self.tkconsole.flist)
jpayne@69:         self.rpcclt.register("linecache", linecache)
jpayne@69:         self.rpcclt.register("interp", self)
jpayne@69:         self.transfer_path(with_cwd=True)
jpayne@69:         self.poll_subprocess()
jpayne@69:         return self.rpcclt
jpayne@69: 
jpayne@69:     def restart_subprocess(self, with_cwd=False, filename=''):
jpayne@69:         if self.restarting:
jpayne@69:             return self.rpcclt
jpayne@69:         self.restarting = True
jpayne@69:         # close only the subprocess debugger
jpayne@69:         debug = self.getdebugger()
jpayne@69:         if debug:
jpayne@69:             try:
jpayne@69:                 # Only close subprocess debugger, don't unregister gui_adap!
jpayne@69:                 debugger_r.close_subprocess_debugger(self.rpcclt)
jpayne@69:             except:
jpayne@69:                 pass
jpayne@69:         # Kill subprocess, spawn a new one, accept connection.
jpayne@69:         self.rpcclt.close()
jpayne@69:         self.terminate_subprocess()
jpayne@69:         console = self.tkconsole
jpayne@69:         was_executing = console.executing
jpayne@69:         console.executing = False
jpayne@69:         self.spawn_subprocess()
jpayne@69:         try:
jpayne@69:             self.rpcclt.accept()
jpayne@69:         except socket.timeout:
jpayne@69:             self.display_no_subprocess_error()
jpayne@69:             return None
jpayne@69:         self.transfer_path(with_cwd=with_cwd)
jpayne@69:         console.stop_readline()
jpayne@69:         # annotate restart in shell window and mark it
jpayne@69:         console.text.delete("iomark", "end-1c")
jpayne@69:         console.write('\n')
jpayne@69:         console.write(restart_line(console.width, filename))
jpayne@69:         console.text.mark_set("restart", "end-1c")
jpayne@69:         console.text.mark_gravity("restart", "left")
jpayne@69:         if not filename:
jpayne@69:             console.showprompt()
jpayne@69:         # restart subprocess debugger
jpayne@69:         if debug:
jpayne@69:             # Restarted debugger connects to current instance of debug GUI
jpayne@69:             debugger_r.restart_subprocess_debugger(self.rpcclt)
jpayne@69:             # reload remote debugger breakpoints for all PyShellEditWindows
jpayne@69:             debug.load_breakpoints()
jpayne@69:         self.compile.compiler.flags = self.original_compiler_flags
jpayne@69:         self.restarting = False
jpayne@69:         return self.rpcclt
jpayne@69: 
jpayne@69:     def __request_interrupt(self):
jpayne@69:         self.rpcclt.remotecall("exec", "interrupt_the_server", (), {})
jpayne@69: 
jpayne@69:     def interrupt_subprocess(self):
jpayne@69:         threading.Thread(target=self.__request_interrupt).start()
jpayne@69: 
jpayne@69:     def kill_subprocess(self):
jpayne@69:         if self._afterid is not None:
jpayne@69:             self.tkconsole.text.after_cancel(self._afterid)
jpayne@69:         try:
jpayne@69:             self.rpcclt.listening_sock.close()
jpayne@69:         except AttributeError:  # no socket
jpayne@69:             pass
jpayne@69:         try:
jpayne@69:             self.rpcclt.close()
jpayne@69:         except AttributeError:  # no socket
jpayne@69:             pass
jpayne@69:         self.terminate_subprocess()
jpayne@69:         self.tkconsole.executing = False
jpayne@69:         self.rpcclt = None
jpayne@69: 
jpayne@69:     def terminate_subprocess(self):
jpayne@69:         "Make sure subprocess is terminated"
jpayne@69:         try:
jpayne@69:             self.rpcsubproc.kill()
jpayne@69:         except OSError:
jpayne@69:             # process already terminated
jpayne@69:             return
jpayne@69:         else:
jpayne@69:             try:
jpayne@69:                 self.rpcsubproc.wait()
jpayne@69:             except OSError:
jpayne@69:                 return
jpayne@69: 
jpayne@69:     def transfer_path(self, with_cwd=False):
jpayne@69:         if with_cwd:        # Issue 13506
jpayne@69:             path = ['']     # include Current Working Directory
jpayne@69:             path.extend(sys.path)
jpayne@69:         else:
jpayne@69:             path = sys.path
jpayne@69: 
jpayne@69:         self.runcommand("""if 1:
jpayne@69:         import sys as _sys
jpayne@69:         _sys.path = %r
jpayne@69:         del _sys
jpayne@69:         \n""" % (path,))
jpayne@69: 
jpayne@69:     active_seq = None
jpayne@69: 
jpayne@69:     def poll_subprocess(self):
jpayne@69:         clt = self.rpcclt
jpayne@69:         if clt is None:
jpayne@69:             return
jpayne@69:         try:
jpayne@69:             response = clt.pollresponse(self.active_seq, wait=0.05)
jpayne@69:         except (EOFError, OSError, KeyboardInterrupt):
jpayne@69:             # lost connection or subprocess terminated itself, restart
jpayne@69:             # [the KBI is from rpc.SocketIO.handle_EOF()]
jpayne@69:             if self.tkconsole.closing:
jpayne@69:                 return
jpayne@69:             response = None
jpayne@69:             self.restart_subprocess()
jpayne@69:         if response:
jpayne@69:             self.tkconsole.resetoutput()
jpayne@69:             self.active_seq = None
jpayne@69:             how, what = response
jpayne@69:             console = self.tkconsole.console
jpayne@69:             if how == "OK":
jpayne@69:                 if what is not None:
jpayne@69:                     print(repr(what), file=console)
jpayne@69:             elif how == "EXCEPTION":
jpayne@69:                 if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
jpayne@69:                     self.remote_stack_viewer()
jpayne@69:             elif how == "ERROR":
jpayne@69:                 errmsg = "pyshell.ModifiedInterpreter: Subprocess ERROR:\n"
jpayne@69:                 print(errmsg, what, file=sys.__stderr__)
jpayne@69:                 print(errmsg, what, file=console)
jpayne@69:             # we received a response to the currently active seq number:
jpayne@69:             try:
jpayne@69:                 self.tkconsole.endexecuting()
jpayne@69:             except AttributeError:  # shell may have closed
jpayne@69:                 pass
jpayne@69:         # Reschedule myself
jpayne@69:         if not self.tkconsole.closing:
jpayne@69:             self._afterid = self.tkconsole.text.after(
jpayne@69:                 self.tkconsole.pollinterval, self.poll_subprocess)
jpayne@69: 
jpayne@69:     debugger = None
jpayne@69: 
jpayne@69:     def setdebugger(self, debugger):
jpayne@69:         self.debugger = debugger
jpayne@69: 
jpayne@69:     def getdebugger(self):
jpayne@69:         return self.debugger
jpayne@69: 
jpayne@69:     def open_remote_stack_viewer(self):
jpayne@69:         """Initiate the remote stack viewer from a separate thread.
jpayne@69: 
jpayne@69:         This method is called from the subprocess, and by returning from this
jpayne@69:         method we allow the subprocess to unblock.  After a bit the shell
jpayne@69:         requests the subprocess to open the remote stack viewer which returns a
jpayne@69:         static object looking at the last exception.  It is queried through
jpayne@69:         the RPC mechanism.
jpayne@69: 
jpayne@69:         """
jpayne@69:         self.tkconsole.text.after(300, self.remote_stack_viewer)
jpayne@69:         return
jpayne@69: 
jpayne@69:     def remote_stack_viewer(self):
jpayne@69:         from idlelib import debugobj_r
jpayne@69:         oid = self.rpcclt.remotequeue("exec", "stackviewer", ("flist",), {})
jpayne@69:         if oid is None:
jpayne@69:             self.tkconsole.root.bell()
jpayne@69:             return
jpayne@69:         item = debugobj_r.StubObjectTreeItem(self.rpcclt, oid)
jpayne@69:         from idlelib.tree import ScrolledCanvas, TreeNode
jpayne@69:         top = Toplevel(self.tkconsole.root)
jpayne@69:         theme = idleConf.CurrentTheme()
jpayne@69:         background = idleConf.GetHighlight(theme, 'normal')['background']
jpayne@69:         sc = ScrolledCanvas(top, bg=background, highlightthickness=0)
jpayne@69:         sc.frame.pack(expand=1, fill="both")
jpayne@69:         node = TreeNode(sc.canvas, None, item)
jpayne@69:         node.expand()
jpayne@69:         # XXX Should GC the remote tree when closing the window
jpayne@69: 
jpayne@69:     gid = 0
jpayne@69: 
jpayne@69:     def execsource(self, source):
jpayne@69:         "Like runsource() but assumes complete exec source"
jpayne@69:         filename = self.stuffsource(source)
jpayne@69:         self.execfile(filename, source)
jpayne@69: 
jpayne@69:     def execfile(self, filename, source=None):
jpayne@69:         "Execute an existing file"
jpayne@69:         if source is None:
jpayne@69:             with tokenize.open(filename) as fp:
jpayne@69:                 source = fp.read()
jpayne@69:                 if use_subprocess:
jpayne@69:                     source = (f"__file__ = r'''{os.path.abspath(filename)}'''\n"
jpayne@69:                               + source + "\ndel __file__")
jpayne@69:         try:
jpayne@69:             code = compile(source, filename, "exec")
jpayne@69:         except (OverflowError, SyntaxError):
jpayne@69:             self.tkconsole.resetoutput()
jpayne@69:             print('*** Error in script or command!\n'
jpayne@69:                  'Traceback (most recent call last):',
jpayne@69:                   file=self.tkconsole.stderr)
jpayne@69:             InteractiveInterpreter.showsyntaxerror(self, filename)
jpayne@69:             self.tkconsole.showprompt()
jpayne@69:         else:
jpayne@69:             self.runcode(code)
jpayne@69: 
jpayne@69:     def runsource(self, source):
jpayne@69:         "Extend base class method: Stuff the source in the line cache first"
jpayne@69:         filename = self.stuffsource(source)
jpayne@69:         self.more = 0
jpayne@69:         # at the moment, InteractiveInterpreter expects str
jpayne@69:         assert isinstance(source, str)
jpayne@69:         # InteractiveInterpreter.runsource() calls its runcode() method,
jpayne@69:         # which is overridden (see below)
jpayne@69:         return InteractiveInterpreter.runsource(self, source, filename)
jpayne@69: 
jpayne@69:     def stuffsource(self, source):
jpayne@69:         "Stuff source in the filename cache"
jpayne@69:         filename = "<pyshell#%d>" % self.gid
jpayne@69:         self.gid = self.gid + 1
jpayne@69:         lines = source.split("\n")
jpayne@69:         linecache.cache[filename] = len(source)+1, 0, lines, filename
jpayne@69:         return filename
jpayne@69: 
jpayne@69:     def prepend_syspath(self, filename):
jpayne@69:         "Prepend sys.path with file's directory if not already included"
jpayne@69:         self.runcommand("""if 1:
jpayne@69:             _filename = %r
jpayne@69:             import sys as _sys
jpayne@69:             from os.path import dirname as _dirname
jpayne@69:             _dir = _dirname(_filename)
jpayne@69:             if not _dir in _sys.path:
jpayne@69:                 _sys.path.insert(0, _dir)
jpayne@69:             del _filename, _sys, _dirname, _dir
jpayne@69:             \n""" % (filename,))
jpayne@69: 
jpayne@69:     def showsyntaxerror(self, filename=None):
jpayne@69:         """Override Interactive Interpreter method: Use Colorizing
jpayne@69: 
jpayne@69:         Color the offending position instead of printing it and pointing at it
jpayne@69:         with a caret.
jpayne@69: 
jpayne@69:         """
jpayne@69:         tkconsole = self.tkconsole
jpayne@69:         text = tkconsole.text
jpayne@69:         text.tag_remove("ERROR", "1.0", "end")
jpayne@69:         type, value, tb = sys.exc_info()
jpayne@69:         msg = getattr(value, 'msg', '') or value or "<no detail available>"
jpayne@69:         lineno = getattr(value, 'lineno', '') or 1
jpayne@69:         offset = getattr(value, 'offset', '') or 0
jpayne@69:         if offset == 0:
jpayne@69:             lineno += 1 #mark end of offending line
jpayne@69:         if lineno == 1:
jpayne@69:             pos = "iomark + %d chars" % (offset-1)
jpayne@69:         else:
jpayne@69:             pos = "iomark linestart + %d lines + %d chars" % \
jpayne@69:                   (lineno-1, offset-1)
jpayne@69:         tkconsole.colorize_syntax_error(text, pos)
jpayne@69:         tkconsole.resetoutput()
jpayne@69:         self.write("SyntaxError: %s\n" % msg)
jpayne@69:         tkconsole.showprompt()
jpayne@69: 
jpayne@69:     def showtraceback(self):
jpayne@69:         "Extend base class method to reset output properly"
jpayne@69:         self.tkconsole.resetoutput()
jpayne@69:         self.checklinecache()
jpayne@69:         InteractiveInterpreter.showtraceback(self)
jpayne@69:         if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
jpayne@69:             self.tkconsole.open_stack_viewer()
jpayne@69: 
jpayne@69:     def checklinecache(self):
jpayne@69:         c = linecache.cache
jpayne@69:         for key in list(c.keys()):
jpayne@69:             if key[:1] + key[-1:] != "<>":
jpayne@69:                 del c[key]
jpayne@69: 
jpayne@69:     def runcommand(self, code):
jpayne@69:         "Run the code without invoking the debugger"
jpayne@69:         # The code better not raise an exception!
jpayne@69:         if self.tkconsole.executing:
jpayne@69:             self.display_executing_dialog()
jpayne@69:             return 0
jpayne@69:         if self.rpcclt:
jpayne@69:             self.rpcclt.remotequeue("exec", "runcode", (code,), {})
jpayne@69:         else:
jpayne@69:             exec(code, self.locals)
jpayne@69:         return 1
jpayne@69: 
jpayne@69:     def runcode(self, code):
jpayne@69:         "Override base class method"
jpayne@69:         if self.tkconsole.executing:
jpayne@69:             self.interp.restart_subprocess()
jpayne@69:         self.checklinecache()
jpayne@69:         debugger = self.debugger
jpayne@69:         try:
jpayne@69:             self.tkconsole.beginexecuting()
jpayne@69:             if not debugger and self.rpcclt is not None:
jpayne@69:                 self.active_seq = self.rpcclt.asyncqueue("exec", "runcode",
jpayne@69:                                                         (code,), {})
jpayne@69:             elif debugger:
jpayne@69:                 debugger.run(code, self.locals)
jpayne@69:             else:
jpayne@69:                 exec(code, self.locals)
jpayne@69:         except SystemExit:
jpayne@69:             if not self.tkconsole.closing:
jpayne@69:                 if tkMessageBox.askyesno(
jpayne@69:                     "Exit?",
jpayne@69:                     "Do you want to exit altogether?",
jpayne@69:                     default="yes",
jpayne@69:                     parent=self.tkconsole.text):
jpayne@69:                     raise
jpayne@69:                 else:
jpayne@69:                     self.showtraceback()
jpayne@69:             else:
jpayne@69:                 raise
jpayne@69:         except:
jpayne@69:             if use_subprocess:
jpayne@69:                 print("IDLE internal error in runcode()",
jpayne@69:                       file=self.tkconsole.stderr)
jpayne@69:                 self.showtraceback()
jpayne@69:                 self.tkconsole.endexecuting()
jpayne@69:             else:
jpayne@69:                 if self.tkconsole.canceled:
jpayne@69:                     self.tkconsole.canceled = False
jpayne@69:                     print("KeyboardInterrupt", file=self.tkconsole.stderr)
jpayne@69:                 else:
jpayne@69:                     self.showtraceback()
jpayne@69:         finally:
jpayne@69:             if not use_subprocess:
jpayne@69:                 try:
jpayne@69:                     self.tkconsole.endexecuting()
jpayne@69:                 except AttributeError:  # shell may have closed
jpayne@69:                     pass
jpayne@69: 
jpayne@69:     def write(self, s):
jpayne@69:         "Override base class method"
jpayne@69:         return self.tkconsole.stderr.write(s)
jpayne@69: 
jpayne@69:     def display_port_binding_error(self):
jpayne@69:         tkMessageBox.showerror(
jpayne@69:             "Port Binding Error",
jpayne@69:             "IDLE can't bind to a TCP/IP port, which is necessary to "
jpayne@69:             "communicate with its Python execution server.  This might be "
jpayne@69:             "because no networking is installed on this computer.  "
jpayne@69:             "Run IDLE with the -n command line switch to start without a "
jpayne@69:             "subprocess and refer to Help/IDLE Help 'Running without a "
jpayne@69:             "subprocess' for further details.",
jpayne@69:             parent=self.tkconsole.text)
jpayne@69: 
jpayne@69:     def display_no_subprocess_error(self):
jpayne@69:         tkMessageBox.showerror(
jpayne@69:             "Subprocess Connection Error",
jpayne@69:             "IDLE's subprocess didn't make connection.\n"
jpayne@69:             "See the 'Startup failure' section of the IDLE doc, online at\n"
jpayne@69:             "https://docs.python.org/3/library/idle.html#startup-failure",
jpayne@69:             parent=self.tkconsole.text)
jpayne@69: 
jpayne@69:     def display_executing_dialog(self):
jpayne@69:         tkMessageBox.showerror(
jpayne@69:             "Already executing",
jpayne@69:             "The Python Shell window is already executing a command; "
jpayne@69:             "please wait until it is finished.",
jpayne@69:             parent=self.tkconsole.text)
jpayne@69: 
jpayne@69: 
jpayne@69: class PyShell(OutputWindow):
jpayne@69: 
jpayne@69:     shell_title = "Python " + python_version() + " Shell"
jpayne@69: 
jpayne@69:     # Override classes
jpayne@69:     ColorDelegator = ModifiedColorDelegator
jpayne@69:     UndoDelegator = ModifiedUndoDelegator
jpayne@69: 
jpayne@69:     # Override menus
jpayne@69:     menu_specs = [
jpayne@69:         ("file", "_File"),
jpayne@69:         ("edit", "_Edit"),
jpayne@69:         ("debug", "_Debug"),
jpayne@69:         ("options", "_Options"),
jpayne@69:         ("window", "_Window"),
jpayne@69:         ("help", "_Help"),
jpayne@69:     ]
jpayne@69: 
jpayne@69:     # Extend right-click context menu
jpayne@69:     rmenu_specs = OutputWindow.rmenu_specs + [
jpayne@69:         ("Squeeze", "<<squeeze-current-text>>"),
jpayne@69:     ]
jpayne@69: 
jpayne@69:     allow_line_numbers = False
jpayne@69: 
jpayne@69:     # New classes
jpayne@69:     from idlelib.history import History
jpayne@69: 
jpayne@69:     def __init__(self, flist=None):
jpayne@69:         if use_subprocess:
jpayne@69:             ms = self.menu_specs
jpayne@69:             if ms[2][0] != "shell":
jpayne@69:                 ms.insert(2, ("shell", "She_ll"))
jpayne@69:         self.interp = ModifiedInterpreter(self)
jpayne@69:         if flist is None:
jpayne@69:             root = Tk()
jpayne@69:             fixwordbreaks(root)
jpayne@69:             root.withdraw()
jpayne@69:             flist = PyShellFileList(root)
jpayne@69: 
jpayne@69:         OutputWindow.__init__(self, flist, None, None)
jpayne@69: 
jpayne@69:         self.usetabs = True
jpayne@69:         # indentwidth must be 8 when using tabs.  See note in EditorWindow:
jpayne@69:         self.indentwidth = 8
jpayne@69: 
jpayne@69:         self.sys_ps1 = sys.ps1 if hasattr(sys, 'ps1') else '>>> '
jpayne@69:         self.prompt_last_line = self.sys_ps1.split('\n')[-1]
jpayne@69:         self.prompt = self.sys_ps1  # Changes when debug active
jpayne@69: 
jpayne@69:         text = self.text
jpayne@69:         text.configure(wrap="char")
jpayne@69:         text.bind("<<newline-and-indent>>", self.enter_callback)
jpayne@69:         text.bind("<<plain-newline-and-indent>>", self.linefeed_callback)
jpayne@69:         text.bind("<<interrupt-execution>>", self.cancel_callback)
jpayne@69:         text.bind("<<end-of-file>>", self.eof_callback)
jpayne@69:         text.bind("<<open-stack-viewer>>", self.open_stack_viewer)
jpayne@69:         text.bind("<<toggle-debugger>>", self.toggle_debugger)
jpayne@69:         text.bind("<<toggle-jit-stack-viewer>>", self.toggle_jit_stack_viewer)
jpayne@69:         if use_subprocess:
jpayne@69:             text.bind("<<view-restart>>", self.view_restart_mark)
jpayne@69:             text.bind("<<restart-shell>>", self.restart_shell)
jpayne@69:         squeezer = self.Squeezer(self)
jpayne@69:         text.bind("<<squeeze-current-text>>",
jpayne@69:                   squeezer.squeeze_current_text_event)
jpayne@69: 
jpayne@69:         self.save_stdout = sys.stdout
jpayne@69:         self.save_stderr = sys.stderr
jpayne@69:         self.save_stdin = sys.stdin
jpayne@69:         from idlelib import iomenu
jpayne@69:         self.stdin = StdInputFile(self, "stdin",
jpayne@69:                                   iomenu.encoding, iomenu.errors)
jpayne@69:         self.stdout = StdOutputFile(self, "stdout",
jpayne@69:                                     iomenu.encoding, iomenu.errors)
jpayne@69:         self.stderr = StdOutputFile(self, "stderr",
jpayne@69:                                     iomenu.encoding, "backslashreplace")
jpayne@69:         self.console = StdOutputFile(self, "console",
jpayne@69:                                      iomenu.encoding, iomenu.errors)
jpayne@69:         if not use_subprocess:
jpayne@69:             sys.stdout = self.stdout
jpayne@69:             sys.stderr = self.stderr
jpayne@69:             sys.stdin = self.stdin
jpayne@69:         try:
jpayne@69:             # page help() text to shell.
jpayne@69:             import pydoc # import must be done here to capture i/o rebinding.
jpayne@69:             # XXX KBK 27Dec07 use text viewer someday, but must work w/o subproc
jpayne@69:             pydoc.pager = pydoc.plainpager
jpayne@69:         except:
jpayne@69:             sys.stderr = sys.__stderr__
jpayne@69:             raise
jpayne@69:         #
jpayne@69:         self.history = self.History(self.text)
jpayne@69:         #
jpayne@69:         self.pollinterval = 50  # millisec
jpayne@69: 
jpayne@69:     def get_standard_extension_names(self):
jpayne@69:         return idleConf.GetExtensions(shell_only=True)
jpayne@69: 
jpayne@69:     reading = False
jpayne@69:     executing = False
jpayne@69:     canceled = False
jpayne@69:     endoffile = False
jpayne@69:     closing = False
jpayne@69:     _stop_readline_flag = False
jpayne@69: 
jpayne@69:     def set_warning_stream(self, stream):
jpayne@69:         global warning_stream
jpayne@69:         warning_stream = stream
jpayne@69: 
jpayne@69:     def get_warning_stream(self):
jpayne@69:         return warning_stream
jpayne@69: 
jpayne@69:     def toggle_debugger(self, event=None):
jpayne@69:         if self.executing:
jpayne@69:             tkMessageBox.showerror("Don't debug now",
jpayne@69:                 "You can only toggle the debugger when idle",
jpayne@69:                 parent=self.text)
jpayne@69:             self.set_debugger_indicator()
jpayne@69:             return "break"
jpayne@69:         else:
jpayne@69:             db = self.interp.getdebugger()
jpayne@69:             if db:
jpayne@69:                 self.close_debugger()
jpayne@69:             else:
jpayne@69:                 self.open_debugger()
jpayne@69: 
jpayne@69:     def set_debugger_indicator(self):
jpayne@69:         db = self.interp.getdebugger()
jpayne@69:         self.setvar("<<toggle-debugger>>", not not db)
jpayne@69: 
jpayne@69:     def toggle_jit_stack_viewer(self, event=None):
jpayne@69:         pass # All we need is the variable
jpayne@69: 
jpayne@69:     def close_debugger(self):
jpayne@69:         db = self.interp.getdebugger()
jpayne@69:         if db:
jpayne@69:             self.interp.setdebugger(None)
jpayne@69:             db.close()
jpayne@69:             if self.interp.rpcclt:
jpayne@69:                 debugger_r.close_remote_debugger(self.interp.rpcclt)
jpayne@69:             self.resetoutput()
jpayne@69:             self.console.write("[DEBUG OFF]\n")
jpayne@69:             self.prompt = self.sys_ps1
jpayne@69:             self.showprompt()
jpayne@69:         self.set_debugger_indicator()
jpayne@69: 
jpayne@69:     def open_debugger(self):
jpayne@69:         if self.interp.rpcclt:
jpayne@69:             dbg_gui = debugger_r.start_remote_debugger(self.interp.rpcclt,
jpayne@69:                                                            self)
jpayne@69:         else:
jpayne@69:             dbg_gui = debugger.Debugger(self)
jpayne@69:         self.interp.setdebugger(dbg_gui)
jpayne@69:         dbg_gui.load_breakpoints()
jpayne@69:         self.prompt = "[DEBUG ON]\n" + self.sys_ps1
jpayne@69:         self.showprompt()
jpayne@69:         self.set_debugger_indicator()
jpayne@69: 
jpayne@69:     def beginexecuting(self):
jpayne@69:         "Helper for ModifiedInterpreter"
jpayne@69:         self.resetoutput()
jpayne@69:         self.executing = 1
jpayne@69: 
jpayne@69:     def endexecuting(self):
jpayne@69:         "Helper for ModifiedInterpreter"
jpayne@69:         self.executing = 0
jpayne@69:         self.canceled = 0
jpayne@69:         self.showprompt()
jpayne@69: 
jpayne@69:     def close(self):
jpayne@69:         "Extend EditorWindow.close()"
jpayne@69:         if self.executing:
jpayne@69:             response = tkMessageBox.askokcancel(
jpayne@69:                 "Kill?",
jpayne@69:                 "Your program is still running!\n Do you want to kill it?",
jpayne@69:                 default="ok",
jpayne@69:                 parent=self.text)
jpayne@69:             if response is False:
jpayne@69:                 return "cancel"
jpayne@69:         self.stop_readline()
jpayne@69:         self.canceled = True
jpayne@69:         self.closing = True
jpayne@69:         return EditorWindow.close(self)
jpayne@69: 
jpayne@69:     def _close(self):
jpayne@69:         "Extend EditorWindow._close(), shut down debugger and execution server"
jpayne@69:         self.close_debugger()
jpayne@69:         if use_subprocess:
jpayne@69:             self.interp.kill_subprocess()
jpayne@69:         # Restore std streams
jpayne@69:         sys.stdout = self.save_stdout
jpayne@69:         sys.stderr = self.save_stderr
jpayne@69:         sys.stdin = self.save_stdin
jpayne@69:         # Break cycles
jpayne@69:         self.interp = None
jpayne@69:         self.console = None
jpayne@69:         self.flist.pyshell = None
jpayne@69:         self.history = None
jpayne@69:         EditorWindow._close(self)
jpayne@69: 
jpayne@69:     def ispythonsource(self, filename):
jpayne@69:         "Override EditorWindow method: never remove the colorizer"
jpayne@69:         return True
jpayne@69: 
jpayne@69:     def short_title(self):
jpayne@69:         return self.shell_title
jpayne@69: 
jpayne@69:     COPYRIGHT = \
jpayne@69:           'Type "help", "copyright", "credits" or "license()" for more information.'
jpayne@69: 
jpayne@69:     def begin(self):
jpayne@69:         self.text.mark_set("iomark", "insert")
jpayne@69:         self.resetoutput()
jpayne@69:         if use_subprocess:
jpayne@69:             nosub = ''
jpayne@69:             client = self.interp.start_subprocess()
jpayne@69:             if not client:
jpayne@69:                 self.close()
jpayne@69:                 return False
jpayne@69:         else:
jpayne@69:             nosub = ("==== No Subprocess ====\n\n" +
jpayne@69:                     "WARNING: Running IDLE without a Subprocess is deprecated\n" +
jpayne@69:                     "and will be removed in a later version. See Help/IDLE Help\n" +
jpayne@69:                     "for details.\n\n")
jpayne@69:             sys.displayhook = rpc.displayhook
jpayne@69: 
jpayne@69:         self.write("Python %s on %s\n%s\n%s" %
jpayne@69:                    (sys.version, sys.platform, self.COPYRIGHT, nosub))
jpayne@69:         self.text.focus_force()
jpayne@69:         self.showprompt()
jpayne@69:         import tkinter
jpayne@69:         tkinter._default_root = None # 03Jan04 KBK What's this?
jpayne@69:         return True
jpayne@69: 
jpayne@69:     def stop_readline(self):
jpayne@69:         if not self.reading:  # no nested mainloop to exit.
jpayne@69:             return
jpayne@69:         self._stop_readline_flag = True
jpayne@69:         self.top.quit()
jpayne@69: 
jpayne@69:     def readline(self):
jpayne@69:         save = self.reading
jpayne@69:         try:
jpayne@69:             self.reading = 1
jpayne@69:             self.top.mainloop()  # nested mainloop()
jpayne@69:         finally:
jpayne@69:             self.reading = save
jpayne@69:         if self._stop_readline_flag:
jpayne@69:             self._stop_readline_flag = False
jpayne@69:             return ""
jpayne@69:         line = self.text.get("iomark", "end-1c")
jpayne@69:         if len(line) == 0:  # may be EOF if we quit our mainloop with Ctrl-C
jpayne@69:             line = "\n"
jpayne@69:         self.resetoutput()
jpayne@69:         if self.canceled:
jpayne@69:             self.canceled = 0
jpayne@69:             if not use_subprocess:
jpayne@69:                 raise KeyboardInterrupt
jpayne@69:         if self.endoffile:
jpayne@69:             self.endoffile = 0
jpayne@69:             line = ""
jpayne@69:         return line
jpayne@69: 
jpayne@69:     def isatty(self):
jpayne@69:         return True
jpayne@69: 
jpayne@69:     def cancel_callback(self, event=None):
jpayne@69:         try:
jpayne@69:             if self.text.compare("sel.first", "!=", "sel.last"):
jpayne@69:                 return # Active selection -- always use default binding
jpayne@69:         except:
jpayne@69:             pass
jpayne@69:         if not (self.executing or self.reading):
jpayne@69:             self.resetoutput()
jpayne@69:             self.interp.write("KeyboardInterrupt\n")
jpayne@69:             self.showprompt()
jpayne@69:             return "break"
jpayne@69:         self.endoffile = 0
jpayne@69:         self.canceled = 1
jpayne@69:         if (self.executing and self.interp.rpcclt):
jpayne@69:             if self.interp.getdebugger():
jpayne@69:                 self.interp.restart_subprocess()
jpayne@69:             else:
jpayne@69:                 self.interp.interrupt_subprocess()
jpayne@69:         if self.reading:
jpayne@69:             self.top.quit()  # exit the nested mainloop() in readline()
jpayne@69:         return "break"
jpayne@69: 
jpayne@69:     def eof_callback(self, event):
jpayne@69:         if self.executing and not self.reading:
jpayne@69:             return # Let the default binding (delete next char) take over
jpayne@69:         if not (self.text.compare("iomark", "==", "insert") and
jpayne@69:                 self.text.compare("insert", "==", "end-1c")):
jpayne@69:             return # Let the default binding (delete next char) take over
jpayne@69:         if not self.executing:
jpayne@69:             self.resetoutput()
jpayne@69:             self.close()
jpayne@69:         else:
jpayne@69:             self.canceled = 0
jpayne@69:             self.endoffile = 1
jpayne@69:             self.top.quit()
jpayne@69:         return "break"
jpayne@69: 
jpayne@69:     def linefeed_callback(self, event):
jpayne@69:         # Insert a linefeed without entering anything (still autoindented)
jpayne@69:         if self.reading:
jpayne@69:             self.text.insert("insert", "\n")
jpayne@69:             self.text.see("insert")
jpayne@69:         else:
jpayne@69:             self.newline_and_indent_event(event)
jpayne@69:         return "break"
jpayne@69: 
jpayne@69:     def enter_callback(self, event):
jpayne@69:         if self.executing and not self.reading:
jpayne@69:             return # Let the default binding (insert '\n') take over
jpayne@69:         # If some text is selected, recall the selection
jpayne@69:         # (but only if this before the I/O mark)
jpayne@69:         try:
jpayne@69:             sel = self.text.get("sel.first", "sel.last")
jpayne@69:             if sel:
jpayne@69:                 if self.text.compare("sel.last", "<=", "iomark"):
jpayne@69:                     self.recall(sel, event)
jpayne@69:                     return "break"
jpayne@69:         except:
jpayne@69:             pass
jpayne@69:         # If we're strictly before the line containing iomark, recall
jpayne@69:         # the current line, less a leading prompt, less leading or
jpayne@69:         # trailing whitespace
jpayne@69:         if self.text.compare("insert", "<", "iomark linestart"):
jpayne@69:             # Check if there's a relevant stdin range -- if so, use it
jpayne@69:             prev = self.text.tag_prevrange("stdin", "insert")
jpayne@69:             if prev and self.text.compare("insert", "<", prev[1]):
jpayne@69:                 self.recall(self.text.get(prev[0], prev[1]), event)
jpayne@69:                 return "break"
jpayne@69:             next = self.text.tag_nextrange("stdin", "insert")
jpayne@69:             if next and self.text.compare("insert lineend", ">=", next[0]):
jpayne@69:                 self.recall(self.text.get(next[0], next[1]), event)
jpayne@69:                 return "break"
jpayne@69:             # No stdin mark -- just get the current line, less any prompt
jpayne@69:             indices = self.text.tag_nextrange("console", "insert linestart")
jpayne@69:             if indices and \
jpayne@69:                self.text.compare(indices[0], "<=", "insert linestart"):
jpayne@69:                 self.recall(self.text.get(indices[1], "insert lineend"), event)
jpayne@69:             else:
jpayne@69:                 self.recall(self.text.get("insert linestart", "insert lineend"), event)
jpayne@69:             return "break"
jpayne@69:         # If we're between the beginning of the line and the iomark, i.e.
jpayne@69:         # in the prompt area, move to the end of the prompt
jpayne@69:         if self.text.compare("insert", "<", "iomark"):
jpayne@69:             self.text.mark_set("insert", "iomark")
jpayne@69:         # If we're in the current input and there's only whitespace
jpayne@69:         # beyond the cursor, erase that whitespace first
jpayne@69:         s = self.text.get("insert", "end-1c")
jpayne@69:         if s and not s.strip():
jpayne@69:             self.text.delete("insert", "end-1c")
jpayne@69:         # If we're in the current input before its last line,
jpayne@69:         # insert a newline right at the insert point
jpayne@69:         if self.text.compare("insert", "<", "end-1c linestart"):
jpayne@69:             self.newline_and_indent_event(event)
jpayne@69:             return "break"
jpayne@69:         # We're in the last line; append a newline and submit it
jpayne@69:         self.text.mark_set("insert", "end-1c")
jpayne@69:         if self.reading:
jpayne@69:             self.text.insert("insert", "\n")
jpayne@69:             self.text.see("insert")
jpayne@69:         else:
jpayne@69:             self.newline_and_indent_event(event)
jpayne@69:         self.text.tag_add("stdin", "iomark", "end-1c")
jpayne@69:         self.text.update_idletasks()
jpayne@69:         if self.reading:
jpayne@69:             self.top.quit() # Break out of recursive mainloop()
jpayne@69:         else:
jpayne@69:             self.runit()
jpayne@69:         return "break"
jpayne@69: 
jpayne@69:     def recall(self, s, event):
jpayne@69:         # remove leading and trailing empty or whitespace lines
jpayne@69:         s = re.sub(r'^\s*\n', '' , s)
jpayne@69:         s = re.sub(r'\n\s*$', '', s)
jpayne@69:         lines = s.split('\n')
jpayne@69:         self.text.undo_block_start()
jpayne@69:         try:
jpayne@69:             self.text.tag_remove("sel", "1.0", "end")
jpayne@69:             self.text.mark_set("insert", "end-1c")
jpayne@69:             prefix = self.text.get("insert linestart", "insert")
jpayne@69:             if prefix.rstrip().endswith(':'):
jpayne@69:                 self.newline_and_indent_event(event)
jpayne@69:                 prefix = self.text.get("insert linestart", "insert")
jpayne@69:             self.text.insert("insert", lines[0].strip())
jpayne@69:             if len(lines) > 1:
jpayne@69:                 orig_base_indent = re.search(r'^([ \t]*)', lines[0]).group(0)
jpayne@69:                 new_base_indent  = re.search(r'^([ \t]*)', prefix).group(0)
jpayne@69:                 for line in lines[1:]:
jpayne@69:                     if line.startswith(orig_base_indent):
jpayne@69:                         # replace orig base indentation with new indentation
jpayne@69:                         line = new_base_indent + line[len(orig_base_indent):]
jpayne@69:                     self.text.insert('insert', '\n'+line.rstrip())
jpayne@69:         finally:
jpayne@69:             self.text.see("insert")
jpayne@69:             self.text.undo_block_stop()
jpayne@69: 
jpayne@69:     def runit(self):
jpayne@69:         line = self.text.get("iomark", "end-1c")
jpayne@69:         # Strip off last newline and surrounding whitespace.
jpayne@69:         # (To allow you to hit return twice to end a statement.)
jpayne@69:         i = len(line)
jpayne@69:         while i > 0 and line[i-1] in " \t":
jpayne@69:             i = i-1
jpayne@69:         if i > 0 and line[i-1] == "\n":
jpayne@69:             i = i-1
jpayne@69:         while i > 0 and line[i-1] in " \t":
jpayne@69:             i = i-1
jpayne@69:         line = line[:i]
jpayne@69:         self.interp.runsource(line)
jpayne@69: 
jpayne@69:     def open_stack_viewer(self, event=None):
jpayne@69:         if self.interp.rpcclt:
jpayne@69:             return self.interp.remote_stack_viewer()
jpayne@69:         try:
jpayne@69:             sys.last_traceback
jpayne@69:         except:
jpayne@69:             tkMessageBox.showerror("No stack trace",
jpayne@69:                 "There is no stack trace yet.\n"
jpayne@69:                 "(sys.last_traceback is not defined)",
jpayne@69:                 parent=self.text)
jpayne@69:             return
jpayne@69:         from idlelib.stackviewer import StackBrowser
jpayne@69:         StackBrowser(self.root, self.flist)
jpayne@69: 
jpayne@69:     def view_restart_mark(self, event=None):
jpayne@69:         self.text.see("iomark")
jpayne@69:         self.text.see("restart")
jpayne@69: 
jpayne@69:     def restart_shell(self, event=None):
jpayne@69:         "Callback for Run/Restart Shell Cntl-F6"
jpayne@69:         self.interp.restart_subprocess(with_cwd=True)
jpayne@69: 
jpayne@69:     def showprompt(self):
jpayne@69:         self.resetoutput()
jpayne@69:         self.console.write(self.prompt)
jpayne@69:         self.text.mark_set("insert", "end-1c")
jpayne@69:         self.set_line_and_column()
jpayne@69:         self.io.reset_undo()
jpayne@69: 
jpayne@69:     def show_warning(self, msg):
jpayne@69:         width = self.interp.tkconsole.width
jpayne@69:         wrapper = TextWrapper(width=width, tabsize=8, expand_tabs=True)
jpayne@69:         wrapped_msg = '\n'.join(wrapper.wrap(msg))
jpayne@69:         if not wrapped_msg.endswith('\n'):
jpayne@69:             wrapped_msg += '\n'
jpayne@69:         self.per.bottom.insert("iomark linestart", wrapped_msg, "stderr")
jpayne@69: 
jpayne@69:     def resetoutput(self):
jpayne@69:         source = self.text.get("iomark", "end-1c")
jpayne@69:         if self.history:
jpayne@69:             self.history.store(source)
jpayne@69:         if self.text.get("end-2c") != "\n":
jpayne@69:             self.text.insert("end-1c", "\n")
jpayne@69:         self.text.mark_set("iomark", "end-1c")
jpayne@69:         self.set_line_and_column()
jpayne@69: 
jpayne@69:     def write(self, s, tags=()):
jpayne@69:         try:
jpayne@69:             self.text.mark_gravity("iomark", "right")
jpayne@69:             count = OutputWindow.write(self, s, tags, "iomark")
jpayne@69:             self.text.mark_gravity("iomark", "left")
jpayne@69:         except:
jpayne@69:             raise ###pass  # ### 11Aug07 KBK if we are expecting exceptions
jpayne@69:                            # let's find out what they are and be specific.
jpayne@69:         if self.canceled:
jpayne@69:             self.canceled = 0
jpayne@69:             if not use_subprocess:
jpayne@69:                 raise KeyboardInterrupt
jpayne@69:         return count
jpayne@69: 
jpayne@69:     def rmenu_check_cut(self):
jpayne@69:         try:
jpayne@69:             if self.text.compare('sel.first', '<', 'iomark'):
jpayne@69:                 return 'disabled'
jpayne@69:         except TclError: # no selection, so the index 'sel.first' doesn't exist
jpayne@69:             return 'disabled'
jpayne@69:         return super().rmenu_check_cut()
jpayne@69: 
jpayne@69:     def rmenu_check_paste(self):
jpayne@69:         if self.text.compare('insert','<','iomark'):
jpayne@69:             return 'disabled'
jpayne@69:         return super().rmenu_check_paste()
jpayne@69: 
jpayne@69: 
jpayne@69: def fix_x11_paste(root):
jpayne@69:     "Make paste replace selection on x11.  See issue #5124."
jpayne@69:     if root._windowingsystem == 'x11':
jpayne@69:         for cls in 'Text', 'Entry', 'Spinbox':
jpayne@69:             root.bind_class(
jpayne@69:                 cls,
jpayne@69:                 '<<Paste>>',
jpayne@69:                 'catch {%W delete sel.first sel.last}\n' +
jpayne@69:                         root.bind_class(cls, '<<Paste>>'))
jpayne@69: 
jpayne@69: 
jpayne@69: usage_msg = """\
jpayne@69: 
jpayne@69: USAGE: idle  [-deins] [-t title] [file]*
jpayne@69:        idle  [-dns] [-t title] (-c cmd | -r file) [arg]*
jpayne@69:        idle  [-dns] [-t title] - [arg]*
jpayne@69: 
jpayne@69:   -h         print this help message and exit
jpayne@69:   -n         run IDLE without a subprocess (DEPRECATED,
jpayne@69:              see Help/IDLE Help for details)
jpayne@69: 
jpayne@69: The following options will override the IDLE 'settings' configuration:
jpayne@69: 
jpayne@69:   -e         open an edit window
jpayne@69:   -i         open a shell window
jpayne@69: 
jpayne@69: The following options imply -i and will open a shell:
jpayne@69: 
jpayne@69:   -c cmd     run the command in a shell, or
jpayne@69:   -r file    run script from file
jpayne@69: 
jpayne@69:   -d         enable the debugger
jpayne@69:   -s         run $IDLESTARTUP or $PYTHONSTARTUP before anything else
jpayne@69:   -t title   set title of shell window
jpayne@69: 
jpayne@69: A default edit window will be bypassed when -c, -r, or - are used.
jpayne@69: 
jpayne@69: [arg]* are passed to the command (-c) or script (-r) in sys.argv[1:].
jpayne@69: 
jpayne@69: Examples:
jpayne@69: 
jpayne@69: idle
jpayne@69:         Open an edit window or shell depending on IDLE's configuration.
jpayne@69: 
jpayne@69: idle foo.py foobar.py
jpayne@69:         Edit the files, also open a shell if configured to start with shell.
jpayne@69: 
jpayne@69: idle -est "Baz" foo.py
jpayne@69:         Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell
jpayne@69:         window with the title "Baz".
jpayne@69: 
jpayne@69: idle -c "import sys; print(sys.argv)" "foo"
jpayne@69:         Open a shell window and run the command, passing "-c" in sys.argv[0]
jpayne@69:         and "foo" in sys.argv[1].
jpayne@69: 
jpayne@69: idle -d -s -r foo.py "Hello World"
jpayne@69:         Open a shell window, run a startup script, enable the debugger, and
jpayne@69:         run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in
jpayne@69:         sys.argv[1].
jpayne@69: 
jpayne@69: echo "import sys; print(sys.argv)" | idle - "foobar"
jpayne@69:         Open a shell window, run the script piped in, passing '' in sys.argv[0]
jpayne@69:         and "foobar" in sys.argv[1].
jpayne@69: """
jpayne@69: 
jpayne@69: def main():
jpayne@69:     import getopt
jpayne@69:     from platform import system
jpayne@69:     from idlelib import testing  # bool value
jpayne@69:     from idlelib import macosx
jpayne@69: 
jpayne@69:     global flist, root, use_subprocess
jpayne@69: 
jpayne@69:     capture_warnings(True)
jpayne@69:     use_subprocess = True
jpayne@69:     enable_shell = False
jpayne@69:     enable_edit = False
jpayne@69:     debug = False
jpayne@69:     cmd = None
jpayne@69:     script = None
jpayne@69:     startup = False
jpayne@69:     try:
jpayne@69:         opts, args = getopt.getopt(sys.argv[1:], "c:deihnr:st:")
jpayne@69:     except getopt.error as msg:
jpayne@69:         print("Error: %s\n%s" % (msg, usage_msg), file=sys.stderr)
jpayne@69:         sys.exit(2)
jpayne@69:     for o, a in opts:
jpayne@69:         if o == '-c':
jpayne@69:             cmd = a
jpayne@69:             enable_shell = True
jpayne@69:         if o == '-d':
jpayne@69:             debug = True
jpayne@69:             enable_shell = True
jpayne@69:         if o == '-e':
jpayne@69:             enable_edit = True
jpayne@69:         if o == '-h':
jpayne@69:             sys.stdout.write(usage_msg)
jpayne@69:             sys.exit()
jpayne@69:         if o == '-i':
jpayne@69:             enable_shell = True
jpayne@69:         if o == '-n':
jpayne@69:             print(" Warning: running IDLE without a subprocess is deprecated.",
jpayne@69:                   file=sys.stderr)
jpayne@69:             use_subprocess = False
jpayne@69:         if o == '-r':
jpayne@69:             script = a
jpayne@69:             if os.path.isfile(script):
jpayne@69:                 pass
jpayne@69:             else:
jpayne@69:                 print("No script file: ", script)
jpayne@69:                 sys.exit()
jpayne@69:             enable_shell = True
jpayne@69:         if o == '-s':
jpayne@69:             startup = True
jpayne@69:             enable_shell = True
jpayne@69:         if o == '-t':
jpayne@69:             PyShell.shell_title = a
jpayne@69:             enable_shell = True
jpayne@69:     if args and args[0] == '-':
jpayne@69:         cmd = sys.stdin.read()
jpayne@69:         enable_shell = True
jpayne@69:     # process sys.argv and sys.path:
jpayne@69:     for i in range(len(sys.path)):
jpayne@69:         sys.path[i] = os.path.abspath(sys.path[i])
jpayne@69:     if args and args[0] == '-':
jpayne@69:         sys.argv = [''] + args[1:]
jpayne@69:     elif cmd:
jpayne@69:         sys.argv = ['-c'] + args
jpayne@69:     elif script:
jpayne@69:         sys.argv = [script] + args
jpayne@69:     elif args:
jpayne@69:         enable_edit = True
jpayne@69:         pathx = []
jpayne@69:         for filename in args:
jpayne@69:             pathx.append(os.path.dirname(filename))
jpayne@69:         for dir in pathx:
jpayne@69:             dir = os.path.abspath(dir)
jpayne@69:             if not dir in sys.path:
jpayne@69:                 sys.path.insert(0, dir)
jpayne@69:     else:
jpayne@69:         dir = os.getcwd()
jpayne@69:         if dir not in sys.path:
jpayne@69:             sys.path.insert(0, dir)
jpayne@69:     # check the IDLE settings configuration (but command line overrides)
jpayne@69:     edit_start = idleConf.GetOption('main', 'General',
jpayne@69:                                     'editor-on-startup', type='bool')
jpayne@69:     enable_edit = enable_edit or edit_start
jpayne@69:     enable_shell = enable_shell or not enable_edit
jpayne@69: 
jpayne@69:     # Setup root.  Don't break user code run in IDLE process.
jpayne@69:     # Don't change environment when testing.
jpayne@69:     if use_subprocess and not testing:
jpayne@69:         NoDefaultRoot()
jpayne@69:     root = Tk(className="Idle")
jpayne@69:     root.withdraw()
jpayne@69:     from idlelib.run import fix_scaling
jpayne@69:     fix_scaling(root)
jpayne@69: 
jpayne@69:     # set application icon
jpayne@69:     icondir = os.path.join(os.path.dirname(__file__), 'Icons')
jpayne@69:     if system() == 'Windows':
jpayne@69:         iconfile = os.path.join(icondir, 'idle.ico')
jpayne@69:         root.wm_iconbitmap(default=iconfile)
jpayne@69:     elif not macosx.isAquaTk():
jpayne@69:         ext = '.png' if TkVersion >= 8.6 else '.gif'
jpayne@69:         iconfiles = [os.path.join(icondir, 'idle_%d%s' % (size, ext))
jpayne@69:                      for size in (16, 32, 48)]
jpayne@69:         icons = [PhotoImage(master=root, file=iconfile)
jpayne@69:                  for iconfile in iconfiles]
jpayne@69:         root.wm_iconphoto(True, *icons)
jpayne@69: 
jpayne@69:     # start editor and/or shell windows:
jpayne@69:     fixwordbreaks(root)
jpayne@69:     fix_x11_paste(root)
jpayne@69:     flist = PyShellFileList(root)
jpayne@69:     macosx.setupApp(root, flist)
jpayne@69: 
jpayne@69:     if enable_edit:
jpayne@69:         if not (cmd or script):
jpayne@69:             for filename in args[:]:
jpayne@69:                 if flist.open(filename) is None:
jpayne@69:                     # filename is a directory actually, disconsider it
jpayne@69:                     args.remove(filename)
jpayne@69:             if not args:
jpayne@69:                 flist.new()
jpayne@69: 
jpayne@69:     if enable_shell:
jpayne@69:         shell = flist.open_shell()
jpayne@69:         if not shell:
jpayne@69:             return # couldn't open shell
jpayne@69:         if macosx.isAquaTk() and flist.dict:
jpayne@69:             # On OSX: when the user has double-clicked on a file that causes
jpayne@69:             # IDLE to be launched the shell window will open just in front of
jpayne@69:             # the file she wants to see. Lower the interpreter window when
jpayne@69:             # there are open files.
jpayne@69:             shell.top.lower()
jpayne@69:     else:
jpayne@69:         shell = flist.pyshell
jpayne@69: 
jpayne@69:     # Handle remaining options. If any of these are set, enable_shell
jpayne@69:     # was set also, so shell must be true to reach here.
jpayne@69:     if debug:
jpayne@69:         shell.open_debugger()
jpayne@69:     if startup:
jpayne@69:         filename = os.environ.get("IDLESTARTUP") or \
jpayne@69:                    os.environ.get("PYTHONSTARTUP")
jpayne@69:         if filename and os.path.isfile(filename):
jpayne@69:             shell.interp.execfile(filename)
jpayne@69:     if cmd or script:
jpayne@69:         shell.interp.runcommand("""if 1:
jpayne@69:             import sys as _sys
jpayne@69:             _sys.argv = %r
jpayne@69:             del _sys
jpayne@69:             \n""" % (sys.argv,))
jpayne@69:         if cmd:
jpayne@69:             shell.interp.execsource(cmd)
jpayne@69:         elif script:
jpayne@69:             shell.interp.prepend_syspath(script)
jpayne@69:             shell.interp.execfile(script)
jpayne@69:     elif shell:
jpayne@69:         # If there is a shell window and no cmd or script in progress,
jpayne@69:         # check for problematic issues and print warning message(s) in
jpayne@69:         # the IDLE shell window; this is less intrusive than always
jpayne@69:         # opening a separate window.
jpayne@69: 
jpayne@69:         # Warn if using a problematic OS X Tk version.
jpayne@69:         tkversionwarning = macosx.tkVersionWarning(root)
jpayne@69:         if tkversionwarning:
jpayne@69:             shell.show_warning(tkversionwarning)
jpayne@69: 
jpayne@69:         # Warn if the "Prefer tabs when opening documents" system
jpayne@69:         # preference is set to "Always".
jpayne@69:         prefer_tabs_preference_warning = macosx.preferTabsPreferenceWarning()
jpayne@69:         if prefer_tabs_preference_warning:
jpayne@69:             shell.show_warning(prefer_tabs_preference_warning)
jpayne@69: 
jpayne@69:     while flist.inversedict:  # keep IDLE running while files are open.
jpayne@69:         root.mainloop()
jpayne@69:     root.destroy()
jpayne@69:     capture_warnings(False)
jpayne@69: 
jpayne@69: if __name__ == "__main__":
jpayne@69:     main()
jpayne@69: 
jpayne@69: capture_warnings(False)  # Make sure turned off; see issue 18081