PC World 2002 May

home *** CD-ROM | disk | FTP | other *** search

/ PC World 2002 May / PCWorld_2002-05_cd.bin / Software / TemaCD / activepython / ActivePython-2.1.1.msi / Python21_Tools_idle_PyShell.py < prev next >

Wrap

Python Source | 2001-07-26 | 24.6 KB | 783 lines

#! /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()