cpython/Lib/idlelib/PyShell.py

861 lines
27 KiB
Python

#! /usr/bin/env python
# changes by dscherer@cmu.edu
# the main() function has been replaced by a whole class, in order to
# address the constraint that only one process can sit on the port
# hard-coded into the loader.
# It attempts to load the RPC protocol server and publish itself. If
# that fails, it assumes that some other copy of IDLE is already running
# on the port and attempts to contact it. It then uses the RPC mechanism
# to ask that copy to do whatever it was instructed (via the command
# line) to do. (Think netscape -remote). The handling of command line
# arguments for remotes is still very incomplete.
# default behavior (no command line options) is to NOT start the Python
# Shell. If files are specified, they are opened, otherwise a single
# blank editor window opens.
# If any command line -options are specified, a shell does appear. This
# is necessary to make the current semantics of the options make sense.
import os
import spawn
import sys
import string
import getopt
import re
import protocol
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, OnDemandOutputWindow
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)
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
return InteractiveInterpreter.runsource(self, source, filename)
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
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
def begin(self):
self.resetoutput()
self.write("Python %s on %s\n%s\nIDLE %s -- press F1 for help\n" %
(sys.version, sys.platform, sys.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.
"""
class usageError:
def __init__(self, string): self.string = string
def __repr__(self): return self.string
class main:
def __init__(self):
try:
self.server = protocol.Server(connection_hook = self.address_ok)
protocol.publish( 'IDLE', self.connect )
self.main( sys.argv[1:] )
return
except protocol.connectionLost:
try:
client = protocol.Client()
IDLE = client.getobject('IDLE')
if IDLE:
try:
IDLE.remote( sys.argv[1:] )
except usageError, msg:
sys.stderr.write("Error: %s\n" % str(msg))
sys.stderr.write(usage_msg)
return
except protocol.connectionLost:
pass
# xxx Should scream via Tk()
print "Something already has our socket, but it won't open a window for me!"
print "Unable to proceed."
def idle(self):
spawn.kill_zombies()
self.server.rpc_loop()
root.after(25, self.idle)
# We permit connections from localhost only
def address_ok(self, addr):
return addr[0] == '127.0.0.1'
def connect(self, client, addr):
return self
def remote( self, argv ):
# xxx Should make this behavior match the behavior in main, or redo
# command line options entirely.
try:
opts, args = getopt.getopt(argv, "c:deist:")
except getopt.error, msg:
raise usageError(msg)
for filename in args:
flist.open(filename)
if not args:
flist.new()
def main( self, argv ):
cmd = None
edit = 0
noshell = 1
debug = 0
startup = 0
try:
opts, args = getopt.getopt(argv, "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:
noshell = 0
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
if noshell: edit=1
if not edit:
if cmd:
sys.argv = ["-c"] + args
else:
sys.argv = args or [""]
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()
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
if edit:
for filename in args:
flist.open(filename)
if not args:
flist.new()
#dbg=OnDemandOutputWindow(flist)
#dbg.set_title('Internal IDLE Problem')
#sys.stdout = PseudoFile(dbg,['stdout'])
#sys.stderr = PseudoFile(dbg,['stderr'])
if noshell:
flist.pyshell = None
else:
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()
self.idle()
root.mainloop()
root.destroy()
if __name__ == "__main__":
main()