f0261a7246
some more demos some contributed items into the library many little tweaks and such git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3843 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
348 lines
12 KiB
Python
348 lines
12 KiB
Python
# shell.py
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"""wxPython interactive shell
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Copyright (c) 1999 SIA "ANK"
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this module is free software. it may be used under same terms as Python itself
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Notes:
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i would like to use command completion (see rlcompleter library module),
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but i cannot load it because i don't have readline...
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History:
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03-oct-1999 [als] created
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04-oct-1999 [als] PyShellOutput.intro moved from __init__ parameters
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to class attributes; html debug disabled
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04-oct-1999 [als] fixed bug with class attributes
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input prompts and output styles added to customized demo
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some html cleanups
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04-oct-1999 [rpd] Changed to use the new sizers
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05-oct-1990 [als] changes inspired by code.InteractiveInterpreter()
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from Python Library. if i knew about this class earlier,
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i would rather inherit from it.
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renamed to wxPyShell.py since i've renounced the 8.3 scheme
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"""
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__version__ ="$Revision$"
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# $RCSfile$
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import sys, string, code, traceback
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from wxPython.wx import *
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from wxPython.html import *
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class PyShellInput(wxPanel):
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"""PyShell input window
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"""
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PS1 =" Enter Command:"
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PS2 ="... continue:"
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def __init__(self, parent, shell, id=-1):
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"""Create input window
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shell must be a PyShell object.
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it is used for exception handling, eval() namespaces,
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and shell.output is used for output
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(print's go to overridden stdout)
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"""
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wxPanel.__init__(self, parent, id)
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self.shell =shell
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# make a private copy of class attrs
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self.PS1 =PyShellInput.PS1
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self.PS2 =PyShellInput.PS2
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# create controls
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self.label =wxStaticText(self, -1, self.PS1)
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tid =wxNewId()
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self.entry =wxTextCtrl(self, tid, style = wxTE_MULTILINE)
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EVT_CHAR(self.entry, self.OnChar)
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self.entry.SetFont(wxFont(9, wxMODERN, wxNORMAL, wxNORMAL, false))
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sizer =wxBoxSizer(wxVERTICAL)
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sizer.AddMany([(self.label, 0, wxEXPAND), (self.entry, 1, wxEXPAND)])
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self.SetSizer(sizer)
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self.SetAutoLayout(true)
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EVT_SET_FOCUS(self, self.OnSetFocus)
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# when in "continuation" mode,
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# two consecutive newlines are required
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# to avoid execution of unfinished block
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self.first_line =1
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def OnSetFocus(self, event):
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self.entry.SetFocus()
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def Clear(self, event=None):
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"""reset input state"""
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self.label.SetLabel(self.PS1)
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self.label.Refresh()
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self.entry.SetSelection(0, self.entry.GetLastPosition())
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self.first_line =1
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# self.entry.SetFocus()
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def OnChar(self, event):
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"""called on CHARevent. executes input on newline"""
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# print "On Char:", event.__dict__.keys()
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if event.KeyCode() !=WXK_RETURN:
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# not of our business
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event.Skip()
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return
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text =self.entry.GetValue()
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# weird CRLF thingy
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text =string.replace(text, "\r\n", "\n")
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# see if we've finished
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if (not (self.first_line or text[-1] =="\n") # in continuation mode
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or (text[-1] =="\\") # escaped newline
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):
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# XXX should escaped newline put myself i "continuation" mode?
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event.Skip()
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return
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# ok, we can try to execute this
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rc =self.shell.TryExec(text)
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if rc:
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# code is incomplete; continue input
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if self.first_line:
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self.label.SetLabel(self.PS2)
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self.label.Refresh()
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self.first_line =0
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event.Skip()
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else:
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self.Clear()
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class PyShellOutput(wxPanel):
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"""PyShell output window
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for now, it is based on simple wxTextCtrl,
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but i'm looking at HTML classes to provide colorized output
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"""
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# attributes for for different (input, output, exception) display styles:
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# begin tag, end tag, newline
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in_style =(" <font color=\"#000080\"><tt>>>> ",
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"</tt></font><br>\n", "<br>\n... ")
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out_style =("<tt>", "</tt>\n", "<br>\n")
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exc_style =("<font color=\"#FF0000\"><tt>",
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"</tt></font>\n", "<br>\n")
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intro ="<H3>wxPython Interactive Shell</H3>\n"
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html_debug =0
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# entity references
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erefs =(("&", "&"), (">", ">"), ("<", "<"), (" ", " "))
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def __init__(self, parent, id=-1):
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wxPanel.__init__(self, parent, id)
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# make a private copy of class attrs
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self.in_style =PyShellOutput.in_style
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self.out_style =PyShellOutput.out_style
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self.exc_style =PyShellOutput.exc_style
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self.intro =PyShellOutput.intro
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self.html_debug =PyShellOutput.html_debug
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# create windows
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if self.html_debug:
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# this was used in html debugging,
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# but i don't want to delete it; it's funny
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splitter =wxSplitterWindow(self, -1)
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self.view =wxTextCtrl(splitter, -1,
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style = wxTE_MULTILINE|wxTE_READONLY|wxHSCROLL)
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self.html =wxHtmlWindow(splitter)
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splitter.SplitVertically(self.view, self.html)
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splitter.SetSashPosition(40)
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splitter.SetMinimumPaneSize(3)
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self.client =splitter
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else:
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self.view =None
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self.html =wxHtmlWindow(self)
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self.client =self.html # used in OnSize()
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self.text =self.intro
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self.html.SetPage(self.text)
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self.html.SetAutoLayout(TRUE)
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self.line_buffer =""
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# refreshes are annoying
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self.in_batch =0
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self.dirty =0
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def OnSize(self, event):
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self.client.SetSize(self.GetClientSize())
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def OnIdle(self, event):
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"""when there's nothing to do, we can update display"""
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if self.in_batch and self.dirty: self.UpdWindow()
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def BeginBatch(self):
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"""do not refresh display till EndBatch()"""
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self.in_batch =1
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def EndBatch(self):
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"""end batch; start updating display immediately"""
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self.in_batch =0
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if self.dirty: self.UpdWindow()
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def UpdWindow(self):
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"""sync display with text buffer"""
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html =self.html
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html.SetPage(self.text)
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self.dirty =0
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# scroll to the end
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(x,y) =html.GetVirtualSize()
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html.Scroll(0, y)
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def AddText(self, text, style=None):
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"""write text to output window"""
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# a trick needed to defer default from compile-time to execute-time
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if style ==None: style =self.out_style
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if 0 and __debug__: sys.__stdout__.write(text)
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# handle entities
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for (symbol, eref) in self.erefs:
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text =string.replace(text, symbol, eref)
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# replace newlines
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text =string.replace(text, "\n", style[2])
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# add to contents
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self.text =self.text +style[0] +text +style[1]
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if not self.in_batch: self.UpdWindow()
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else: self.dirty =1
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if self.html_debug:
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# html debug output needn't to be too large
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self.view.SetValue(self.text[-4096:])
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def write(self, str, style=None):
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"""stdout-like interface"""
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if style ==None: style =self.out_style
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# do not process incomplete lines
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if len(str) <1:
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# hm... what was i supposed to do?
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return
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elif str[-1] !="\n":
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self.line_buffer =self.line_buffer +str
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else:
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self.AddText(self.line_buffer +str, style)
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self.line_buffer =""
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def flush(self, style=None):
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"""write out all that was left in line buffer"""
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if style ==None: style =self.out_style
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self.AddText(self.line_buffer +"\n", style)
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def write_in(self, str, style=None):
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"""write text in "input" style"""
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if style ==None: style =self.in_style
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self.AddText(str, style)
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def write_exc(self, str, style=None):
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"""write text in "exception" style"""
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if style ==None: style =self.exc_style
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self.AddText(str, style)
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class PyShell(wxPanel):
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"""interactive Python shell with wxPython interface
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"""
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def __init__(self, parent, globals=globals(), locals={},
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id=-1, pos=wxDefaultPosition, size=wxDefaultSize,
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style=wxTAB_TRAVERSAL, name="shell"):
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"""create PyShell window"""
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wxPanel.__init__(self, parent, id, pos, size, style, name)
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self.globals =globals
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self.locals =locals
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splitter =wxSplitterWindow(self, -1)
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self.output =PyShellOutput(splitter)
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self.input =PyShellInput(splitter, self)
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self.input.SetFocus()
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splitter.SplitHorizontally(self.input, self.output)
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splitter.SetSashPosition(100)
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splitter.SetMinimumPaneSize(20)
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self.splitter =splitter
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EVT_SET_FOCUS(self, self.OnSetFocus)
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def OnSetFocus(self, event):
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self.input.SetFocus()
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def TryExec(self, source, symbol="single"):
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"""Compile and run some source in the interpreter.
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borrowed from code.InteractiveInterpreter().runsource()
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as i said above, i would rather like to inherit from that class
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returns 1 if more input is required, or 0, otherwise
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"""
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try:
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cc = code.compile_command(source, symbol=symbol)
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except (OverflowError, SyntaxError):
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# [als] hm... never seen anything of that kind
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self.ShowSyntaxError()
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return 0
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if cc is None:
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# source is incomplete
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return 1
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# source is sucessfully compiled
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out =self.output
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# redirect system stdout to the output window
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prev_out =sys.stdout
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sys.stdout =out
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# begin printout batch (html updates are deferred until EndBatch())
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out.BeginBatch()
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out.write_in(source)
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try:
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exec cc in self.globals, self.locals
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except SystemExit:
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# SystemExit is not handled and has to be re-raised
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raise
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except:
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# all other exceptions produce traceback output
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self.ShowException()
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# switch back to saved stdout
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sys.stdout =prev_out
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# commit printout
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out.flush()
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out.EndBatch()
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return 0
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def ShowException(self):
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"""display the traceback for the latest exception"""
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(etype, value, tb) =sys.exc_info()
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# remove myself from traceback
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tblist =traceback.extract_tb(tb)[1:]
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msg =string.join(traceback.format_exception_only(etype, value)
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+traceback.format_list(tblist))
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self.output.write_exc(msg)
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def ShowSyntaxError(self):
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"""display message about syntax error (no traceback here)"""
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(etype, value, tb) =sys.exc_info()
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msg =string.join(traceback.format_exception_only(etype, value))
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self.output.write_exc(msg)
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def OnSize(self, event):
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self.splitter.SetSize(self.GetClientSize())
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#----------------------------------------------------------------------
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if __name__ == '__main__':
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class MyFrame(wxFrame):
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"""Very standard Frame class. Nothing special here!"""
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def __init__(self, parent=NULL, id =-1,
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title="wxPython Interactive Shell"):
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wxFrame.__init__(self, parent, id, title)
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self.shell =PyShell(self)
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class MyApp(wxApp):
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"""Demonstrates usage of both default and customized shells"""
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def OnInit(self):
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frame = MyFrame()
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frame.Show(TRUE)
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self.SetTopWindow(frame)
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## PyShellInput.PS1 =" let's get some work done..."
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## PyShellInput.PS2 =" ok, what do you really mean?"
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## PyShellOutput.in_style =(
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## "<I><font color=\"#008000\"><tt>>>> ",
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## "</tt></font></I><br>\n", "<br>\n... ")
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## PyShellOutput.out_style =(
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## "<font color=\"#000080\"><tt>",
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## "</tt></font><br>\n", "<br>\n")
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## PyShellOutput.exc_style =("<B><font color=\"#FF0000\"><tt>",
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## "</tt></font></B>\n", "<br>\n")
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## PyShellOutput.intro ="<I><B>Customized wxPython Shell</B>" \
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## "<br><-- move this sash to see html debug output</I><br>\n"
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## PyShellOutput.html_debug =1
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## frame = MyFrame(title="Customized wxPython Shell")
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## frame.Show(TRUE)
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return TRUE
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app = MyApp(0)
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app.MainLoop()
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