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cpython/Tools/idle/PyShell.py
Tim Peters 301ab7f2d0 Initialize new save_warnings_filters data member in ModifiedInterpreter.__init__. 
Was getting mystery
    ModifiedInterpreter instance has no attribute 'save_warnings_filters'
errors at odd times (for sure in a fresh IDLE, fresh file, then Run Script).
2001-03-29 03:34:43 +00:00

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#! /usr/bin/env python
import os
import sys
import string
import getopt
import re
import warnings
import linecache
from code import InteractiveInterpreter
from Tkinter import *
import tkMessageBox
from EditorWindow import EditorWindow, fixwordbreaks
from FileList import FileList
from ColorDelegator import ColorDelegator
from UndoDelegator import UndoDelegator
from OutputWindow import OutputWindow
from IdleConf import idleconf
import idlever
# We need to patch linecache.checkcache, because we don't want it
# to throw away our <pyshell#...> entries.
# Rather than repeating its code here, we save those entries,
# then call the original function, and then restore the saved entries.
def linecache_checkcache(orig_checkcache=linecache.checkcache):
cache = linecache.cache
save = {}
for filename in cache.keys():
if filename[:1] + filename[-1:] == '<>':
save[filename] = cache[filename]
orig_checkcache()
cache.update(save)
linecache.checkcache = linecache_checkcache
# Note: <<newline-and-indent>> event is defined in AutoIndent.py
#$ event <<plain-newline-and-indent>>
#$ win <Control-j>
#$ unix <Control-j>
#$ event <<beginning-of-line>>
#$ win <Control-a>
#$ win <Home>
#$ unix <Control-a>
#$ unix <Home>
#$ event <<history-next>>
#$ win <Alt-n>
#$ unix <Alt-n>
#$ event <<history-previous>>
#$ win <Alt-p>
#$ unix <Alt-p>
#$ event <<interrupt-execution>>
#$ win <Control-c>
#$ unix <Control-c>
#$ event <<end-of-file>>
#$ win <Control-d>
#$ unix <Control-d>
#$ event <<open-stack-viewer>>
#$ event <<toggle-debugger>>
class PyShellEditorWindow(EditorWindow):
# Regular text edit window when a shell is present
# XXX ought to merge with regular editor window
def __init__(self, *args):
apply(EditorWindow.__init__, (self,) + args)
self.text.bind("<<set-breakpoint-here>>", self.set_breakpoint_here)
self.text.bind("<<open-python-shell>>", self.flist.open_shell)
rmenu_specs = [
("Set breakpoint here", "<<set-breakpoint-here>>"),
]
def set_breakpoint_here(self, event=None):
if not self.flist.pyshell or not self.flist.pyshell.interp.debugger:
self.text.bell()
return
self.flist.pyshell.interp.debugger.set_breakpoint_here(self)
class PyShellFileList(FileList):
# File list when a shell is present
EditorWindow = PyShellEditorWindow
pyshell = None
def open_shell(self, event=None):
if self.pyshell:
self.pyshell.wakeup()
else:
self.pyshell = PyShell(self)
self.pyshell.begin()
return self.pyshell
class ModifiedColorDelegator(ColorDelegator):
# Colorizer for the shell window itself
def recolorize_main(self):
self.tag_remove("TODO", "1.0", "iomark")
self.tag_add("SYNC", "1.0", "iomark")
ColorDelegator.recolorize_main(self)
tagdefs = ColorDelegator.tagdefs.copy()
cconf = idleconf.getsection('Colors')
tagdefs.update({
"stdin": cconf.getcolor("stdin"),
"stdout": cconf.getcolor("stdout"),
"stderr": cconf.getcolor("stderr"),
"console": cconf.getcolor("console"),
"ERROR": cconf.getcolor("ERROR"),
None: cconf.getcolor("normal"),
})
class ModifiedUndoDelegator(UndoDelegator):
# Forbid insert/delete before the I/O mark
def insert(self, index, chars, tags=None):
try:
if self.delegate.compare(index, "<", "iomark"):
self.delegate.bell()
return
except TclError:
pass
UndoDelegator.insert(self, index, chars, tags)
def delete(self, index1, index2=None):
try:
if self.delegate.compare(index1, "<", "iomark"):
self.delegate.bell()
return
except TclError:
pass
UndoDelegator.delete(self, index1, index2)
class ModifiedInterpreter(InteractiveInterpreter):
def __init__(self, tkconsole):
self.tkconsole = tkconsole
locals = sys.modules['__main__'].__dict__
InteractiveInterpreter.__init__(self, locals=locals)
self.save_warnings_filters = None
gid = 0
def execsource(self, source):
# Like runsource() but assumes complete exec source
filename = self.stuffsource(source)
self.execfile(filename, source)
def execfile(self, filename, source=None):
# Execute an existing file
if source is None:
source = open(filename, "r").read()
try:
code = compile(source, filename, "exec")
except (OverflowError, SyntaxError):
self.tkconsole.resetoutput()
InteractiveInterpreter.showsyntaxerror(self, filename)
else:
self.runcode(code)
def runsource(self, source):
# Extend base class to stuff the source in the line cache first
filename = self.stuffsource(source)
self.more = 0
self.save_warnings_filters = warnings.filters[:]
warnings.filterwarnings(action="error", category=SyntaxWarning)
try:
return InteractiveInterpreter.runsource(self, source, filename)
finally:
if self.save_warnings_filters is not None:
warnings.filters[:] = self.save_warnings_filters
self.save_warnings_filters = None
def stuffsource(self, source):
# Stuff source in the filename cache
filename = "<pyshell#%d>" % self.gid
self.gid = self.gid + 1
lines = string.split(source, "\n")
linecache.cache[filename] = len(source)+1, 0, lines, filename
return 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 and 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 is 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()
self.checklinecache()
InteractiveInterpreter.showtraceback(self)
def checklinecache(self):
c = linecache.cache
for key in c.keys():
if key[:1] + key[-1:] != "<>":
del c[key]
debugger = None
def setdebugger(self, debugger):
self.debugger = debugger
def getdebugger(self):
return self.debugger
def runcode(self, code):
# Override base class method
if self.save_warnings_filters is not None:
warnings.filters[:] = self.save_warnings_filters
self.save_warnings_filters = None
debugger = self.debugger
try:
self.tkconsole.beginexecuting()
try:
if debugger:
debugger.run(code, self.locals)
else:
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()
if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
self.tkconsole.open_stack_viewer()
except:
self.showtraceback()
if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
self.tkconsole.open_stack_viewer()
finally:
self.tkconsole.endexecuting()
def write(self, s):
# Override base class write
self.tkconsole.console.write(s)
class PyShell(OutputWindow):
shell_title = "Python Shell"
# Override classes
ColorDelegator = ModifiedColorDelegator
UndoDelegator = ModifiedUndoDelegator
# Override menu bar specs
menu_specs = PyShellEditorWindow.menu_specs[:]
menu_specs.insert(len(menu_specs)-2, ("debug", "_Debug"))
# New classes
from IdleHistory import History
def __init__(self, flist=None):
self.interp = ModifiedInterpreter(self)
if flist is None:
root = Tk()
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
OutputWindow.__init__(self, flist, None, None)
import __builtin__
__builtin__.quit = __builtin__.exit = "To exit, type Ctrl-D."
self.auto = self.extensions["AutoIndent"] # Required extension
self.auto.config(usetabs=1, indentwidth=8, context_use_ps1=1)
text = self.text
text.configure(wrap="char")
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("<<open-stack-viewer>>", self.open_stack_viewer)
text.bind("<<toggle-debugger>>", self.toggle_debugger)
text.bind("<<open-python-shell>>", self.flist.open_shell)
text.bind("<<toggle-jit-stack-viewer>>", self.toggle_jit_stack_viewer)
self.save_stdout = sys.stdout
self.save_stderr = sys.stderr
self.save_stdin = sys.stdin
sys.stdout = PseudoFile(self, "stdout")
sys.stderr = PseudoFile(self, "stderr")
sys.stdin = self
self.console = PseudoFile(self, "console")
self.history = self.History(self.text)
reading = 0
executing = 0
canceled = 0
endoffile = 0
def toggle_debugger(self, event=None):
if self.executing:
tkMessageBox.showerror("Don't debug now",
"You can only toggle the debugger when idle",
master=self.text)
self.set_debugger_indicator()
return "break"
else:
db = self.interp.getdebugger()
if db:
self.close_debugger()
else:
self.open_debugger()
def set_debugger_indicator(self):
db = self.interp.getdebugger()
self.setvar("<<toggle-debugger>>", not not db)
def toggle_jit_stack_viewer( self, event=None):
pass # All we need is the variable
def close_debugger(self):
db = self.interp.getdebugger()
if db:
self.interp.setdebugger(None)
db.close()
self.resetoutput()
self.console.write("[DEBUG OFF]\n")
sys.ps1 = ">>> "
self.showprompt()
self.set_debugger_indicator()
def open_debugger(self):
import Debugger
self.interp.setdebugger(Debugger.Debugger(self))
sys.ps1 = "[DEBUG ON]\n>>> "
self.showprompt()
self.set_debugger_indicator()
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._cancel_check = 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(
"Kill?",
"The program is still running; do you want to kill it?",
default="ok",
master=self.text):
return "cancel"
self.canceled = 1
if self.reading:
self.top.quit()
return "cancel"
return PyShellEditorWindow.close(self)
def _close(self):
self.close_debugger()
# Restore std streams
sys.stdout = self.save_stdout
sys.stderr = self.save_stderr
sys.stdin = self.save_stdin
# Break cycles
self.interp = None
self.console = None
self.auto = None
self.flist.pyshell = None
self.history = None
OutputWindow._close(self) # Really EditorWindow._close
def ispythonsource(self, filename):
# Override this so EditorWindow never removes the colorizer
return 1
def short_title(self):
return self.shell_title
COPYRIGHT = \
'Type "copyright", "credits" or "license" for more information.'
def begin(self):
self.resetoutput()
self.write("Python %s on %s\n%s\nIDLE %s -- press F1 for help\n" %
(sys.version, sys.platform, self.COPYRIGHT,
idlever.IDLE_VERSION))
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 isatty(self):
return 1
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.auto_indent(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("sel.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 and there's only whitespace
# beyond the cursor, erase that whitespace first
s = self.text.get("insert", "end-1c")
if s and not string.strip(s):
self.text.delete("insert", "end-1c")
# 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.auto_indent(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.auto_indent(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
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 StackBrowser
sv = StackBrowser(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, tags=()):
self.text.mark_gravity("iomark", "right")
OutputWindow.write(self, s, tags, "iomark")
self.text.mark_gravity("iomark", "left")
if self.canceled:
self.canceled = 0
raise KeyboardInterrupt
class PseudoFile:
def __init__(self, shell, tags):
self.shell = shell
self.tags = tags
def write(self, s):
self.shell.write(s, self.tags)
def writelines(self, l):
map(self.write, l)
def flush(self):
pass
def isatty(self):
return 1
usage_msg = """\
usage: idle.py [-c command] [-d] [-e] [-s] [-t title] [arg] ...
-c command run this command
-d enable debugger
-e edit mode; arguments are files to be edited
-s run $IDLESTARTUP or $PYTHONSTARTUP before anything else
-t title set title of shell window
When neither -c nor -e is used, and there are arguments, and the first
argument is not '-', the first argument is run as a script. Remaining
arguments are arguments to the script or to the command run by -c.
"""
def main():
cmd = None
edit = 0
debug = 0
startup = 0
try:
opts, args = getopt.getopt(sys.argv[1:], "c:deist:")
except getopt.error, msg:
sys.stderr.write("Error: %s\n" % str(msg))
sys.stderr.write(usage_msg)
sys.exit(2)
for o, a in opts:
if o == '-c':
cmd = a
if o == '-d':
debug = 1
if o == '-e':
edit = 1
if o == '-s':
startup = 1
if o == '-t':
PyShell.shell_title = a
for i in range(len(sys.path)):
sys.path[i] = os.path.abspath(sys.path[i])
pathx = []
if edit:
for filename in args:
pathx.append(os.path.dirname(filename))
elif args and args[0] != "-":
pathx.append(os.path.dirname(args[0]))
else:
pathx.append(os.curdir)
for dir in pathx:
dir = os.path.abspath(dir)
if not dir in sys.path:
sys.path.insert(0, dir)
global flist, root
root = Tk(className="Idle")
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
if edit:
for filename in args:
flist.open(filename)
else:
if cmd:
sys.argv = ["-c"] + args
else:
sys.argv = args or [""]
shell = PyShell(flist)
interp = shell.interp
flist.pyshell = shell
if startup:
filename = os.environ.get("IDLESTARTUP") or \
os.environ.get("PYTHONSTARTUP")
if filename and os.path.isfile(filename):
interp.execfile(filename)
if debug:
shell.open_debugger()
if cmd:
interp.execsource(cmd)
elif not edit and args and args[0] != "-":
interp.execfile(args[0])
shell.begin()
root.mainloop()
root.destroy()
if __name__ == "__main__":
main()
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