cpython/Tools/idle/PyShell.py

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#! /usr/bin/env python
import os
import sys
import string
import re
import linecache
from code import InteractiveInterpreter
from Tkinter import *
import tkMessageBox
from EditorWindow import fixwordbreaks
from FileList import FileList, MultiEditorWindow, MultiIOBinding
from ColorDelegator import ColorDelegator
class PyShellEditorWindow(MultiEditorWindow):
def fixedwindowsmenu(self, wmenu):
wmenu.add_command(label="Python Shell", command=self.flist.open_shell)
class PyShellFileList(FileList):
EditorWindow = PyShellEditorWindow
pyshell = None
def open_shell(self):
if self.pyshell:
self.pyshell.wakeup()
else:
self.pyshell = PyShell(self)
self.pyshell.begin()
return self.pyshell
class ModifiedIOBinding(MultiIOBinding):
def defaultfilename(self, mode="open"):
if self.filename:
return MultiIOBinding.defaultfilename(self, mode)
else:
try:
pwd = os.getcwd()
except os.error:
pwd = ""
return pwd, ""
def open(self, event):
# Override base class method -- don't allow reusing this window
filename = self.askopenfile()
if filename:
self.flist.open(filename)
return "break"
def maybesave(self):
# Override base class method -- don't ask any questions
if self.text.get_saved():
return "yes"
else:
return "no"
class ModifiedColorDelegator(ColorDelegator):
def recolorize_main(self):
self.tag_remove("TODO", "1.0", "iomark")
self.tag_add("SYNC", "1.0", "iomark")
ColorDelegator.recolorize_main(self)
class ModifiedInterpreter(InteractiveInterpreter):
def __init__(self, tkconsole):
self.tkconsole = tkconsole
InteractiveInterpreter.__init__(self)
gid = 0
def runsource(self, source):
# Extend base class to stuff the source in the line cache
filename = "<console#%d>" % self.gid
self.gid = self.gid + 1
lines = string.split(source, "\n")
linecache.cache[filename] = len(source)+1, 0, lines, filename
self.more = 0
return InteractiveInterpreter.runsource(self, source, filename)
def showsyntaxerror(self, filename=None):
# Extend base class to color the offending position
# (instead of printing it and pointing at it with a caret)
text = self.tkconsole.text
stuff = self.unpackerror()
if not stuff:
self.tkconsole.resetoutput()
InteractiveInterpreter.showsyntaxerror(self, filename)
return
msg, lineno, offset, line = stuff
if lineno == 1:
pos = "iomark + %d chars" % (offset-1)
else:
pos = "iomark linestart + %d lines + %d chars" % (lineno-1,
offset-1)
text.tag_add("ERROR", pos)
text.see(pos)
char = text.get(pos)
if char in string.letters + string.digits + "_":
text.tag_add("ERROR", pos + " wordstart", pos)
self.tkconsole.resetoutput()
self.write("SyntaxError: %s\n" % str(msg))
def unpackerror(self):
type, value, tb = sys.exc_info()
ok = type == SyntaxError
if ok:
try:
msg, (dummy_filename, lineno, offset, line) = value
except:
ok = 0
if ok:
return msg, lineno, offset, line
else:
return None
def showtraceback(self):
# Extend base class method to reset output properly
text = self.tkconsole.text
self.tkconsole.resetoutput()
InteractiveInterpreter.showtraceback(self)
def runcode(self, code):
# Override base class method
try:
self.tkconsole.beginexecuting()
try:
exec code in self.locals
except SystemExit:
if tkMessageBox.askyesno(
"Exit?",
"Do you want to exit altogether?",
default="yes",
master=self.tkconsole.text):
raise
else:
self.showtraceback()
except:
self.showtraceback()
finally:
self.tkconsole.endexecuting()
def write(self, s):
# Override base class write
self.tkconsole.console.write(s)
class PyShell(PyShellEditorWindow):
# Override classes
ColorDelegator = ModifiedColorDelegator
IOBinding = ModifiedIOBinding
# Override menu bar specs
menu_specs = PyShellEditorWindow.menu_specs[:]
menu_specs.insert(len(menu_specs)-1, ("debug", "Debug"))
# New class
from History import History
def __init__(self, flist=None):
self.interp = ModifiedInterpreter(self)
if flist is None:
root = Tk()
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
PyShellEditorWindow.__init__(self, flist, None, None)
self.config_colors()
import __builtin__
__builtin__.quit = __builtin__.exit = "To exit, type Ctrl-D."
self.auto.config(prefertabs=1)
text = self.text
text.bind("<<newline-and-indent>>", self.enter_callback)
text.bind("<<plain-newline-and-indent>>", self.linefeed_callback)
text.bind("<<interrupt-execution>>", self.cancel_callback)
text.bind("<<beginning-of-line>>", self.home_callback)
text.bind("<<end-of-file>>", self.eof_callback)
text.bind("<<goto-traceback-line>>", self.goto_traceback_line)
text.bind("<<open-stack-viewer>>", self.open_stack_viewer)
sys.stdout = PseudoFile(self, "stdout")
##sys.stderr = PseudoFile(self, "stderr")
sys.stdin = self
self.console = PseudoFile(self, "console")
self.history = self.History(self.text)
tagdefs = {
##"stdin": {"background": "yellow"},
"stdout": {"foreground": "blue"},
"stderr": {"foreground": "#007700"},
"console": {"foreground": "red"},
"ERROR": {"background": "#FF7777"},
None: {"foreground": "purple"}, # default
}
def config_colors(self):
for tag, cnf in self.tagdefs.items():
if cnf:
if not tag:
apply(self.text.configure, (), cnf)
else:
apply(self.text.tag_configure, (tag,), cnf)
reading = 0
executing = 0
canceled = 0
endoffile = 0
def beginexecuting(self):
# Helper for ModifiedInterpreter
self.resetoutput()
self.executing = 1
self._cancel_check = self.cancel_check
##sys.settrace(self._cancel_check)
def endexecuting(self):
# Helper for ModifiedInterpreter
sys.settrace(None)
self.executing = 0
self.canceled = 0
def close(self):
# Extend base class method
if self.executing:
# XXX Need to ask a question here
if not tkMessageBox.askokcancel(
"Cancel?",
"The program is still running; do you want to cancel it?",
default="ok",
master=self.text):
return "cancel"
self.canceled = 1
if self.reading:
self.top.quit()
return "cancel"
reply = PyShellEditorWindow.close(self)
if reply != "cancel":
self.flist.pyshell = None
# Restore std streams
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
sys.stdin = sys.__stdin__
# Break cycles
self.interp = None
self.console = None
return reply
def ispythonsource(self, filename):
# Override this so EditorWindow never removes the colorizer
return 1
def saved_change_hook(self):
# Override this to get the title right
title = "Python Shell"
if self.io.filename:
title = title + ": " + self.io.filename
if not self.undo.get_saved():
title = title + " *"
self.top.wm_title(title)
def begin(self):
self.resetoutput()
self.write("Python %s on %s\n%s\n" %
(sys.version, sys.platform, sys.copyright))
try:
sys.ps1
except AttributeError:
sys.ps1 = ">>> "
self.showprompt()
import Tkinter
Tkinter._default_root = None
def interact(self):
self.begin()
self.top.mainloop()
def readline(self):
save = self.reading
try:
self.reading = 1
self.top.mainloop()
finally:
self.reading = save
line = self.text.get("iomark", "end-1c")
self.resetoutput()
if self.canceled:
self.canceled = 0
raise KeyboardInterrupt
if self.endoffile:
self.endoffile = 0
return ""
return line
def cancel_callback(self, event):
try:
if self.text.compare("sel.first", "!=", "sel.last"):
return # Active selection -- always use default binding
except:
pass
if not (self.executing or self.reading):
self.resetoutput()
self.write("KeyboardInterrupt\n")
self.showprompt()
return "break"
self.endoffile = 0
self.canceled = 1
if self.reading:
self.top.quit()
return "break"
def eof_callback(self, event):
if self.executing and not self.reading:
return # Let the default binding (delete next char) take over
if not (self.text.compare("iomark", "==", "insert") and
self.text.compare("insert", "==", "end-1c")):
return # Let the default binding (delete next char) take over
if not self.executing:
## if not tkMessageBox.askokcancel(
## "Exit?",
## "Are you sure you want to exit?",
## default="ok", master=self.text):
## return "break"
self.resetoutput()
self.close()
else:
self.canceled = 0
self.endoffile = 1
self.top.quit()
return "break"
def home_callback(self, event):
if event.state != 0 and event.keysym == "Home":
return # <Modifier-Home>; fall back to class binding
if self.text.compare("iomark", "<=", "insert") and \
self.text.compare("insert linestart", "<=", "iomark"):
self.text.mark_set("insert", "iomark")
self.text.tag_remove("sel", "1.0", "end")
self.text.see("insert")
return "break"
def linefeed_callback(self, event):
# Insert a linefeed without entering anything (still autoindented)
if self.reading:
self.text.insert("insert", "\n")
self.text.see("insert")
else:
self.auto.autoindent(event)
return "break"
def enter_callback(self, event):
if self.executing and not self.reading:
return # Let the default binding (insert '\n') take over
# If some text is selected, recall the selection
# (but only if this before the I/O mark)
try:
sel = self.text.get("sel.first", "sel.last")
if sel:
if self.text.compare("self.last", "<=", "iomark"):
self.recall(sel)
return "break"
except:
pass
# If we're strictly before the line containing iomark, recall
# the current line, less a leading prompt, less leading or
# trailing whitespace
if self.text.compare("insert", "<", "iomark linestart"):
# Check if there's a relevant stdin range -- if so, use it
prev = self.text.tag_prevrange("stdin", "insert")
if prev and self.text.compare("insert", "<", prev[1]):
self.recall(self.text.get(prev[0], prev[1]))
return "break"
next = self.text.tag_nextrange("stdin", "insert")
if next and self.text.compare("insert lineend", ">=", next[0]):
self.recall(self.text.get(next[0], next[1]))
return "break"
# No stdin mark -- just get the current line
self.recall(self.text.get("insert linestart", "insert lineend"))
return "break"
# If we're in the current input before its last line,
# insert a newline right at the insert point
if self.text.compare("insert", "<", "end-1c linestart"):
self.auto.autoindent(event)
return "break"
# We're in the last line; append a newline and submit it
self.text.mark_set("insert", "end-1c")
if self.reading:
self.text.insert("insert", "\n")
self.text.see("insert")
else:
self.auto.autoindent(event)
self.text.tag_add("stdin", "iomark", "end-1c")
self.text.update_idletasks()
if self.reading:
self.top.quit() # Break out of recursive mainloop() in raw_input()
else:
self.runit()
return "break"
def recall(self, s):
if self.history:
self.history.recall(s)
def runit(self):
line = self.text.get("iomark", "end-1c")
# Strip off last newline and surrounding whitespace.
# (To allow you to hit return twice to end a statement.)
i = len(line)
while i > 0 and line[i-1] in " \t":
i = i-1
if i > 0 and line[i-1] == "\n":
i = i-1
while i > 0 and line[i-1] in " \t":
i = i-1
line = line[:i]
more = self.interp.runsource(line)
if not more:
self.showprompt()
def cancel_check(self, frame, what, args,
dooneevent=tkinter.dooneevent,
dontwait=tkinter.DONT_WAIT):
# Hack -- use the debugger hooks to be able to handle events
# and interrupt execution at any time.
# This slows execution down quite a bit, so you may want to
# disable this (by not calling settrace() in runcode() above)
# for full-bore (uninterruptable) speed.
# XXX This should become a user option.
if self.canceled:
return
dooneevent(dontwait)
if self.canceled:
self.canceled = 0
raise KeyboardInterrupt
return self._cancel_check
file_line_pats = [
r'File "([^"]*)", line (\d+)',
r'([^\s]+)\((\d+)\)',
r'([^\s]+):\s*(\d+):',
]
file_line_progs = None
def goto_traceback_line(self, event=None):
if self.file_line_progs is None:
l = []
for pat in self.file_line_pats:
l.append(re.compile(pat))
self.file_line_progs = l
# x, y = self.event.x, self.event.y
# self.text.mark_set("insert", "@%d,%d" % (x, y))
line = self.text.get("insert linestart", "insert lineend")
for prog in self.file_line_progs:
m = prog.search(line)
if m:
break
else:
tkMessageBox.showerror("No traceback line",
"The line you point at doesn't look "
"like an error message.",
master=self.text)
return
filename, lineno = m.group(1, 2)
try:
f = open(filename, "r")
f.close()
except IOError, msg:
self.text.bell()
return
edit = self.flist.open(filename)
try:
lineno = int(lineno)
except ValueError, msg:
self.text.bell()
return
edit.gotoline(lineno)
def open_stack_viewer(self, event=None):
try:
sys.last_traceback
except:
tkMessageBox.showerror("No stack trace",
"There is no stack trace yet.\n"
"(sys.last_traceback is not defined)",
master=self.text)
return
from StackViewer import StackViewer
sv = StackViewer(self.root, self.flist)
def showprompt(self):
self.resetoutput()
try:
s = str(sys.ps1)
except:
s = ""
self.console.write(s)
self.text.mark_set("insert", "end-1c")
def resetoutput(self):
source = self.text.get("iomark", "end-1c")
if self.history:
self.history.history_store(source)
if self.text.get("end-2c") != "\n":
self.text.insert("end-1c", "\n")
self.text.mark_set("iomark", "end-1c")
sys.stdout.softspace = 0
def write(self, s):
# Overrides base class write
self.console.write(s)
class PseudoFile:
def __init__(self, interp, tags):
self.interp = interp
self.text = interp.text
self.tags = tags
def write(self, s):
self.text.mark_gravity("iomark", "right")
self.text.insert("iomark", str(s), self.tags)
self.text.mark_gravity("iomark", "left")
self.text.see("iomark")
self.text.update()
if self.interp.canceled:
self.interp.canceled = 0
raise KeyboardInterrupt
def writelines(self, l):
map(self.write, l)
def main():
global flist, root
root = Tk()
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
if sys.argv[1:]:
for filename in sys.argv[1:]:
flist.open(filename)
t = PyShell(flist)
flist.pyshell = t
t.begin()
root.mainloop()
if __name__ == "__main__":
main()