shell.py

Wxpython Implemented on Windows CE, Source code

        import __builtin__
        __builtin__.close = __builtin__.exit = __builtin__.quit = \
            'Click on the close button to leave the application.'


    def quit(self):
        """Quit the application."""
        # XXX Good enough for now but later we want to send a close event.
        # In the close event handler we can make sure they want to
        # quit.  Other applications, like PythonCard, may choose to
        # hide rather than quit so we should just post the event and
        # let the surrounding app decide what it wants to do.
        self.write('Click on the close button to leave the application.')


    def setLocalShell(self):
        """Add 'shell' to locals as reference to ShellFacade instance."""
        self.interp.locals['shell'] = ShellFacade(other=self)


    def execStartupScript(self, startupScript):
        """Execute the user's PYTHONSTARTUP script if they have one."""
        if startupScript and os.path.isfile(startupScript):
            text = 'Startup script executed: ' + startupScript
            self.push('print %r; execfile(%r)' % (text, startupScript))
            self.interp.startupScript = startupScript
        else:
            self.push('')


    def about(self):
        """Display information about Py."""
        text = """
Author: %r
Py Version: %s
Py Shell Revision: %s
Py Interpreter Revision: %s
Python Version: %s
wxPython Version: %s
wxPython PlatformInfo: %s
Platform: %s""" % \
        (__author__, VERSION, self.revision, self.interp.revision,
         sys.version.split()[0], wx.VERSION_STRING, str(wx.PlatformInfo),
         sys.platform)
        self.write(text.strip())


    def OnChar(self, event):
        """Keypress event handler.

        Only receives an event if OnKeyDown calls event.Skip() for the
        corresponding event."""

        if self.noteMode:
            event.Skip()
            return

        # Prevent modification of previously submitted
        # commands/responses.
        if not self.CanEdit():
            return
        key = event.KeyCode()
        currpos = self.GetCurrentPos()
        stoppos = self.promptPosEnd
        # Return (Enter) needs to be ignored in this handler.
        if key in [wx.WXK_RETURN, wx.WXK_NUMPAD_ENTER]:
            pass
        elif key in self.autoCompleteKeys:
            # Usually the dot (period) key activates auto completion.
            # Get the command between the prompt and the cursor.  Add
            # the autocomplete character to the end of the command.
            if self.AutoCompActive():
                self.AutoCompCancel()
            command = self.GetTextRange(stoppos, currpos) + chr(key)
            self.write(chr(key))
            if self.autoComplete:
                self.autoCompleteShow(command)
        elif key == ord('('):
            # The left paren activates a call tip and cancels an
            # active auto completion.
            if self.AutoCompActive():
                self.AutoCompCancel()
            # Get the command between the prompt and the cursor.  Add
            # the '(' to the end of the command.
            self.ReplaceSelection('')
            command = self.GetTextRange(stoppos, currpos) + '('
            self.write('(')
            self.autoCallTipShow(command, self.GetCurrentPos() == self.GetTextLength())
        else:
            # Allow the normal event handling to take place.
            event.Skip()


    def OnKeyDown(self, event):
        """Key down event handler."""

        key = event.KeyCode()
        # If the auto-complete window is up let it do its thing.
        if self.AutoCompActive():
            event.Skip()
            return
        
        # Prevent modification of previously submitted
        # commands/responses.
        controlDown = event.ControlDown()
        altDown = event.AltDown()
        shiftDown = event.ShiftDown()
        currpos = self.GetCurrentPos()
        endpos = self.GetTextLength()
        selecting = self.GetSelectionStart() != self.GetSelectionEnd()
        
        if controlDown and shiftDown and key in (ord('F'), ord('f')): 
            li = self.GetCurrentLine()
            m = self.MarkerGet(li)
            if m & 1<<0:
                startP = self.PositionFromLine(li)
                self.MarkerDelete(li, 0)
                maxli = self.GetLineCount()
                li += 1 # li stayed visible as header-line
                li0 = li 
                while li<maxli and self.GetLineVisible(li) == 0:
                    li += 1
                endP = self.GetLineEndPosition(li-1)
                self.ShowLines(li0, li-1)
                self.SetSelection( startP, endP ) # select reappearing text to allow "hide again"
                return
            startP,endP = self.GetSelection()
            endP-=1
            startL,endL = self.LineFromPosition(startP), self.LineFromPosition(endP)

            if endL == self.LineFromPosition(self.promptPosEnd): # never hide last prompt
                endL -= 1

            m = self.MarkerGet(startL)
            self.MarkerAdd(startL, 0)
            self.HideLines(startL+1,endL)
            self.SetCurrentPos( startP ) # to ensure caret stays visible !

        if key == wx.WXK_F12: #seb
            if self.noteMode:
                # self.promptPosStart not used anyway - or ? 
                self.promptPosEnd = self.PositionFromLine( self.GetLineCount()-1 ) + len(str(sys.ps1))
                self.GotoLine(self.GetLineCount())
                self.GotoPos(self.promptPosEnd)
                self.prompt()  #make sure we have a prompt
                self.SetCaretForeground("black")
                self.SetCaretWidth(1)    #default
                self.SetCaretPeriod(500) #default
            else:
                self.SetCaretForeground("red")
                self.SetCaretWidth(4)
                self.SetCaretPeriod(0) #steady

            self.noteMode = not self.noteMode
            return
        if self.noteMode:
            event.Skip()
            return

        # Return (Enter) is used to submit a command to the
        # interpreter.
        if (not controlDown and not shiftDown and not altDown) and key in [wx.WXK_RETURN, wx.WXK_NUMPAD_ENTER]:
            if self.CallTipActive():
                self.CallTipCancel()
            self.processLine()
            
        # Complete Text (from already typed words)    
        elif shiftDown and key in [wx.WXK_RETURN, wx.WXK_NUMPAD_ENTER]:
            self.OnShowCompHistory()
            
        # Ctrl+Return (Ctrl+Enter) is used to insert a line break.
        elif controlDown and key in [wx.WXK_RETURN, wx.WXK_NUMPAD_ENTER]:
            if self.CallTipActive():
                self.CallTipCancel()
            if currpos == endpos:
                self.processLine()
            else:
                self.insertLineBreak()
                
        # Let Ctrl-Alt-* get handled normally.
        elif controlDown and altDown:
            event.Skip()
            
        # Clear the current, unexecuted command.
        elif key == wx.WXK_ESCAPE:
            if self.CallTipActive():
                event.Skip()
            else:
                self.clearCommand()

        # Clear the current command
        elif key == wx.WXK_BACK and controlDown and shiftDown:
            self.clearCommand()

        # Increase font size.
        elif controlDown and key in (ord(']'), wx.WXK_NUMPAD_ADD):
            dispatcher.send(signal='FontIncrease')

        # Decrease font size.
        elif controlDown and key in (ord('['), wx.WXK_NUMPAD_SUBTRACT):
            dispatcher.send(signal='FontDecrease')

        # Default font size.
        elif controlDown and key in (ord('='), wx.WXK_NUMPAD_DIVIDE):
            dispatcher.send(signal='FontDefault')

        # Cut to the clipboard.
        elif (controlDown and key in (ord('X'), ord('x'))) \
                 or (shiftDown and key == wx.WXK_DELETE):
            self.Cut()

        # Copy to the clipboard.
        elif controlDown and not shiftDown \
                 and key in (ord('C'), ord('c'), wx.WXK_INSERT):
            self.Copy()

        # Copy to the clipboard, including prompts.
        elif controlDown and shiftDown \
                 and key in (ord('C'), ord('c'), wx.WXK_INSERT):
            self.CopyWithPrompts()

        # Copy to the clipboard, including prefixed prompts.
        elif altDown and not controlDown \
                 and key in (ord('C'), ord('c'), wx.WXK_INSERT):
            self.CopyWithPromptsPrefixed()

        # Home needs to be aware of the prompt.
        elif key == wx.WXK_HOME:
            home = self.promptPosEnd
            if currpos > home:
                self.SetCurrentPos(home)
                if not selecting and not shiftDown:
                    self.SetAnchor(home)
                    self.EnsureCaretVisible()
            else:
                event.Skip()

        #
        # The following handlers modify text, so we need to see if
        # there is a selection that includes text prior to the prompt.
        #
        # Don't modify a selection with text prior to the prompt.
        elif selecting and key not in NAVKEYS and not self.CanEdit():
            pass

        # Paste from the clipboard.
        elif (controlDown and not shiftDown and key in (ord('V'), ord('v'))) \
                 or (shiftDown and not controlDown and key == wx.WXK_INSERT):
            self.Paste()

        # manually invoke AutoComplete and Calltips
        elif controlDown and key == wx.WXK_SPACE:
            self.OnCallTipAutoCompleteManually(shiftDown)

        # Paste from the clipboard, run commands.
        elif controlDown and shiftDown and key in (ord('V'), ord('v')):
            self.PasteAndRun()
            
        # Replace with the previous command from the history buffer.
        elif (controlDown and key == wx.WXK_UP) \
                 or (altDown and key in (ord('P'), ord('p'))):
            self.OnHistoryReplace(step=+1)
            
        # Replace with the next command from the history buffer.
        elif (controlDown and key == wx.WXK_DOWN) \
                 or (altDown and key in (ord('N'), ord('n'))):
            self.OnHistoryReplace(step=-1)
            
        # Insert the previous command from the history buffer.
        elif (shiftDown and key == wx.WXK_UP) and self.CanEdit():
            self.OnHistoryInsert(step=+1)
            
        # Insert the next command from the history buffer.
        elif (shiftDown and key == wx.WXK_DOWN) and self.CanEdit():
            self.OnHistoryInsert(step=-1)
            
        # Search up the history for the text in front of the cursor.
        elif key == wx.WXK_F8:
            self.OnHistorySearch()
            
        # Don't backspace over the latest non-continuation prompt.
        elif key == wx.WXK_BACK:
            if selecting and self.CanEdit():
                event.Skip()
            elif currpos > self.promptPosEnd:
                event.Skip()
                
        # Only allow these keys after the latest prompt.
        elif key in (wx.WXK_TAB, wx.WXK_DELETE):
            if self.CanEdit():
                event.Skip()
                
        # Don't toggle between insert mode and overwrite mode.
        elif key == wx.WXK_INSERT:
            pass
        
        # Don't allow line deletion.
        elif controlDown and key in (ord('L'), ord('l')):
            pass

        # Don't allow line transposition.
        elif controlDown and key in (ord('T'), ord('t')):
            pass

        # Basic navigation keys should work anywhere.
        elif key in NAVKEYS:
            event.Skip()

        # Protect the readonly portion of the shell.
        elif not self.CanEdit():
            pass

        else:
            event.Skip()


    def OnShowCompHistory(self):
        """Show possible autocompletion Words from already typed words."""
        
        #copy from history
        his = self.history[:]
        
        #put together in one string
        joined = " ".join (his)
        import re

        #sort out only "good" words
        newlist = re.split("[ \.\[\]=}(\)\,0-9\"]", joined)
        
        #length > 1 (mix out "trash")
        thlist = []
        for i in newlist:
            if len (i) > 1:
                thlist.append (i)
        
        #unique (no duplicate words
        #oneliner from german python forum => unique list
        unlist = [thlist[i] for i in xrange(len(thlist)) if thlist[i] not in thlist[:i]]
            
        #sort lowercase
        unlist.sort(lambda a, b: cmp(a.lower(), b.lower()))
        
        #this is more convenient, isn't it?
        self.AutoCompSetIgnoreCase(True)
        
        #join again together in a string
        stringlist = " ".join(unlist)

        #pos von 0 noch ausrechnen

        #how big is the offset?
        cpos = self.GetCurrentPos() - 1
        while chr (self.GetCharAt (cpos)).isalnum():
            cpos -= 1
            
        #the most important part
        self.AutoCompShow(self.GetCurrentPos() - cpos -1, stringlist)