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# encoding: utf-8
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"""
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A Wx widget to act as a console and input commands.
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This widget deals with prompts and provides an edit buffer
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restricted to after the last prompt.
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"""
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__docformat__ = "restructuredtext en"
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#-------------------------------------------------------------------------------
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# Copyright (C) 2008 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is
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# in the file COPYING, distributed as part of this software.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# Imports
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#-------------------------------------------------------------------------------
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import wx
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import wx.stc as stc
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from wx.py import editwindow
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import sys
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LINESEP = '\n'
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if sys.platform == 'win32':
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LINESEP = '\n\r'
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import re
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# FIXME: Need to provide an API for non user-generated display on the
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# screen: this should not be editable by the user.
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_DEFAULT_SIZE = 10
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_DEFAULT_STYLE = {
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'stdout' : 'fore:#0000FF',
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'stderr' : 'fore:#007f00',
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'trace' : 'fore:#FF0000',
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'default' : 'size:%d' % _DEFAULT_SIZE,
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'bracegood' : 'fore:#FFFFFF,back:#0000FF,bold',
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'bracebad' : 'fore:#000000,back:#FF0000,bold',
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# properties for the various Python lexer styles
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'comment' : 'fore:#007F00',
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'number' : 'fore:#007F7F',
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'string' : 'fore:#7F007F,italic',
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'char' : 'fore:#7F007F,italic',
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'keyword' : 'fore:#00007F,bold',
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'triple' : 'fore:#7F0000',
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'tripledouble' : 'fore:#7F0000',
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'class' : 'fore:#0000FF,bold,underline',
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'def' : 'fore:#007F7F,bold',
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'operator' : 'bold'
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}
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# new style numbers
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_STDOUT_STYLE = 15
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_STDERR_STYLE = 16
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_TRACE_STYLE = 17
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# system colors
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#SYS_COLOUR_BACKGROUND = wx.SystemSettings.GetColour(wx.SYS_COLOUR_BACKGROUND)
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#-------------------------------------------------------------------------------
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# The console widget class
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#-------------------------------------------------------------------------------
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class ConsoleWidget(editwindow.EditWindow):
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""" Specialized styled text control view for console-like workflow.
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This widget is mainly interested in dealing with the prompt and
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keeping the cursor inside the editing line.
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"""
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title = 'Console'
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style = _DEFAULT_STYLE.copy()
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# Translation table from ANSI escape sequences to color. Override
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# this to specify your colors.
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ANSI_STYLES = {'0;30': [0, 'BLACK'], '0;31': [1, 'RED'],
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'0;32': [2, 'GREEN'], '0;33': [3, 'BROWN'],
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'0;34': [4, 'BLUE'], '0;35': [5, 'PURPLE'],
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'0;36': [6, 'CYAN'], '0;37': [7, 'LIGHT GREY'],
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'1;30': [8, 'DARK GREY'], '1;31': [9, 'RED'],
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'1;32': [10, 'SEA GREEN'], '1;33': [11, 'YELLOW'],
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'1;34': [12, 'LIGHT BLUE'], '1;35':
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[13, 'MEDIUM VIOLET RED'],
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'1;36': [14, 'LIGHT STEEL BLUE'], '1;37': [15, 'YELLOW']}
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# The color of the carret (call _apply_style() after setting)
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carret_color = 'BLACK'
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#--------------------------------------------------------------------------
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# Public API
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#--------------------------------------------------------------------------
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def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition,
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size=wx.DefaultSize, style=0, ):
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editwindow.EditWindow.__init__(self, parent, id, pos, size, style)
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self.configure_scintilla()
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# FIXME: we need to retrieve this from the interpreter.
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self.prompt = \
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'\n\x01\x1b[0;34m\x02In [\x01\x1b[1;34m\x02%i\x01\x1b[0;34m\x02]: \x01\x1b[0m\x02'
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self.new_prompt(self.prompt % 1)
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self.Bind(wx.EVT_KEY_DOWN, self._on_key_down)
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self.Bind(wx.EVT_KEY_UP, self._on_key_up)
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def configure_scintilla(self):
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self.SetEOLMode(stc.STC_EOL_LF)
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# Ctrl"+" or Ctrl "-" can be used to zoomin/zoomout the text inside
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# the widget
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self.CmdKeyAssign(ord('+'), stc.STC_SCMOD_CTRL, stc.STC_CMD_ZOOMIN)
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self.CmdKeyAssign(ord('-'), stc.STC_SCMOD_CTRL, stc.STC_CMD_ZOOMOUT)
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# Also allow Ctrl Shift "=" for poor non US keyboard users.
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self.CmdKeyAssign(ord('='), stc.STC_SCMOD_CTRL|stc.STC_SCMOD_SHIFT,
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stc.STC_CMD_ZOOMIN)
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#self.CmdKeyAssign(stc.STC_KEY_PRIOR, stc.STC_SCMOD_SHIFT,
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# stc.STC_CMD_PAGEUP)
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#self.CmdKeyAssign(stc.STC_KEY_NEXT, stc.STC_SCMOD_SHIFT,
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# stc.STC_CMD_PAGEDOWN)
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# Keys: we need to clear some of the keys the that don't play
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# well with a console.
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self.CmdKeyClear(ord('D'), stc.STC_SCMOD_CTRL)
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self.CmdKeyClear(ord('L'), stc.STC_SCMOD_CTRL)
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self.CmdKeyClear(ord('T'), stc.STC_SCMOD_CTRL)
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self.SetEOLMode(stc.STC_EOL_CRLF)
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self.SetWrapMode(stc.STC_WRAP_CHAR)
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self.SetWrapMode(stc.STC_WRAP_WORD)
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self.SetBufferedDraw(True)
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self.SetUseAntiAliasing(True)
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self.SetLayoutCache(stc.STC_CACHE_PAGE)
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self.SetUndoCollection(False)
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self.SetUseTabs(True)
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self.SetIndent(4)
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self.SetTabWidth(4)
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self.EnsureCaretVisible()
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# we don't want scintilla's autocompletion to choose
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# automaticaly out of a single choice list, as we pop it up
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# automaticaly
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self.AutoCompSetChooseSingle(False)
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self.AutoCompSetMaxHeight(10)
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self.SetMargins(3, 3) #text is moved away from border with 3px
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# Suppressing Scintilla margins
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self.SetMarginWidth(0, 0)
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self.SetMarginWidth(1, 0)
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self.SetMarginWidth(2, 0)
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self._apply_style()
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# Xterm escape sequences
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self.color_pat = re.compile('\x01?\x1b\[(.*?)m\x02?')
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self.title_pat = re.compile('\x1b]0;(.*?)\x07')
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#self.SetEdgeMode(stc.STC_EDGE_LINE)
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#self.SetEdgeColumn(80)
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# styles
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p = self.style
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self.StyleSetSpec(stc.STC_STYLE_DEFAULT, p['default'])
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self.StyleClearAll()
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self.StyleSetSpec(_STDOUT_STYLE, p['stdout'])
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self.StyleSetSpec(_STDERR_STYLE, p['stderr'])
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self.StyleSetSpec(_TRACE_STYLE, p['trace'])
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self.StyleSetSpec(stc.STC_STYLE_BRACELIGHT, p['bracegood'])
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self.StyleSetSpec(stc.STC_STYLE_BRACEBAD, p['bracebad'])
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self.StyleSetSpec(stc.STC_P_COMMENTLINE, p['comment'])
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self.StyleSetSpec(stc.STC_P_NUMBER, p['number'])
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self.StyleSetSpec(stc.STC_P_STRING, p['string'])
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self.StyleSetSpec(stc.STC_P_CHARACTER, p['char'])
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self.StyleSetSpec(stc.STC_P_WORD, p['keyword'])
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self.StyleSetSpec(stc.STC_P_WORD2, p['keyword'])
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self.StyleSetSpec(stc.STC_P_TRIPLE, p['triple'])
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self.StyleSetSpec(stc.STC_P_TRIPLEDOUBLE, p['tripledouble'])
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self.StyleSetSpec(stc.STC_P_CLASSNAME, p['class'])
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self.StyleSetSpec(stc.STC_P_DEFNAME, p['def'])
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self.StyleSetSpec(stc.STC_P_OPERATOR, p['operator'])
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self.StyleSetSpec(stc.STC_P_COMMENTBLOCK, p['comment'])
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def write(self, text, refresh=True):
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""" Write given text to buffer, while translating the ansi escape
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sequences.
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"""
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# XXX: do not put print statements to sys.stdout/sys.stderr in
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# this method, the print statements will call this method, as
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# you will end up with an infinit loop
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if self.debug:
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print >>sys.__stderr__, text
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title = self.title_pat.split(text)
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if len(title)>1:
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self.title = title[-2]
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text = self.title_pat.sub('', text)
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segments = self.color_pat.split(text)
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segment = segments.pop(0)
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self.GotoPos(self.GetLength())
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self.StartStyling(self.GetLength(), 0xFF)
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try:
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self.AppendText(segment)
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except UnicodeDecodeError:
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# XXX: Do I really want to skip the exception?
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pass
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if segments:
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for ansi_tag, text in zip(segments[::2], segments[1::2]):
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self.StartStyling(self.GetLength(), 0xFF)
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try:
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self.AppendText(text)
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except UnicodeDecodeError:
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# XXX: Do I really want to skip the exception?
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pass
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if ansi_tag not in self.ANSI_STYLES:
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style = 0
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else:
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style = self.ANSI_STYLES[ansi_tag][0]
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self.SetStyling(len(text), style)
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self.GotoPos(self.GetLength())
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if refresh:
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wx.Yield()
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def new_prompt(self, prompt):
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""" Prints a prompt at start of line, and move the start of the
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current block there.
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The prompt can be give with ascii escape sequences.
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"""
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self.write(prompt)
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# now we update our cursor giving end of prompt
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self.current_prompt_pos = self.GetLength()
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self.current_prompt_line = self.GetCurrentLine()
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wx.Yield()
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self.EnsureCaretVisible()
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def replace_current_edit_buffer(self, text):
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""" Replace currently entered command line with given text.
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"""
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self.SetSelection(self.current_prompt_pos, self.GetLength())
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self.ReplaceSelection(text)
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self.GotoPos(self.GetLength())
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def get_current_edit_buffer(self):
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""" Returns the text in current edit buffer.
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"""
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current_edit_buffer = self.GetTextRange(self.current_prompt_pos,
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self.GetLength())
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current_edit_buffer = current_edit_buffer.replace(LINESEP, '\n')
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return current_edit_buffer
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#--------------------------------------------------------------------------
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# Private API
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#--------------------------------------------------------------------------
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def _apply_style(self):
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""" Applies the colors for the different text elements and the
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carret.
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"""
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self.SetCaretForeground(self.carret_color)
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#self.StyleClearAll()
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self.StyleSetSpec(stc.STC_STYLE_BRACELIGHT,
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"fore:#FF0000,back:#0000FF,bold")
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self.StyleSetSpec(stc.STC_STYLE_BRACEBAD,
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"fore:#000000,back:#FF0000,bold")
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for style in self.ANSI_STYLES.values():
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self.StyleSetSpec(style[0], "bold,fore:%s" % style[1])
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def write_completion(self, possibilities):
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# FIXME: This is non Wx specific and needs to be moved into
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# the base class.
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current_buffer = self.get_current_edit_buffer()
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self.write('\n')
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max_len = len(max(possibilities, key=len)) + 1
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#now we check how much symbol we can put on a line...
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chars_per_line = self.GetSize()[0]/self.GetCharWidth()
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symbols_per_line = max(1, chars_per_line/max_len)
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pos = 1
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buf = []
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for symbol in possibilities:
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if pos < symbols_per_line:
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buf.append(symbol.ljust(max_len))
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pos += 1
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else:
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buf.append(symbol.rstrip() + '\n')
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pos = 1
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self.write(''.join(buf))
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self.new_prompt(self.prompt % (self.last_result['number'] + 1))
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self.replace_current_edit_buffer(current_buffer)
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def pop_completion(self, possibilities, offset=0):
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""" Pops up an autocompletion menu. Offset is the offset
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in characters of the position at which the menu should
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appear, relativ to the cursor.
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"""
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self.AutoCompSetIgnoreCase(False)
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self.AutoCompSetAutoHide(False)
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self.AutoCompSetMaxHeight(len(possibilities))
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self.AutoCompShow(offset, " ".join(possibilities))
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def scroll_to_bottom(self):
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maxrange = self.GetScrollRange(wx.VERTICAL)
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self.ScrollLines(maxrange)
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def _on_key_down(self, event, skip=True):
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""" Key press callback used for correcting behavior for
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console-like interfaces: the cursor is constraint to be after
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the last prompt.
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Return True if event as been catched.
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"""
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catched = True
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# Intercept some specific keys.
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if event.KeyCode == ord('L') and event.ControlDown() :
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self.scroll_to_bottom()
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elif event.KeyCode == ord('K') and event.ControlDown() :
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self.replace_current_edit_buffer('')
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elif event.KeyCode == wx.WXK_PAGEUP and event.ShiftDown():
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self.ScrollPages(-1)
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elif event.KeyCode == wx.WXK_PAGEDOWN and event.ShiftDown():
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self.ScrollPages(1)
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elif event.KeyCode == wx.WXK_UP and event.ShiftDown():
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self.ScrollLines(-1)
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elif event.KeyCode == wx.WXK_DOWN and event.ShiftDown():
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self.ScrollLines(1)
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else:
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catched = False
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if self.AutoCompActive():
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event.Skip()
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else:
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if event.KeyCode in (13, wx.WXK_NUMPAD_ENTER) and \
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event.Modifiers in (wx.MOD_NONE, wx.MOD_WIN):
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catched = True
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self.CallTipCancel()
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self.write('\n')
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# Under windows scintilla seems to be doing funny stuff to the
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# line returns here, but get_current_edit_buffer filters this
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# out.
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if sys.platform == 'win32':
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self.replace_current_edit_buffer(
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self.get_current_edit_buffer())
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self._on_enter()
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elif event.KeyCode == wx.WXK_HOME:
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if event.Modifiers in (wx.MOD_NONE, wx.MOD_WIN):
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self.GotoPos(self.current_prompt_pos)
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catched = True
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elif event.Modifiers in (wx.MOD_SHIFT, wx.MOD_WIN) :
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# FIXME: This behavior is not ideal: if the selection
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# is already started, it will jump.
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self.SetSelectionStart(self.current_prompt_pos)
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self.SetSelectionEnd(self.GetCurrentPos())
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catched = True
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elif event.KeyCode == wx.WXK_UP:
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if self.GetCurrentLine() > self.current_prompt_line:
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if self.GetCurrentLine() == self.current_prompt_line + 1 \
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and self.GetColumn(self.GetCurrentPos()) < \
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self.GetColumn(self.current_prompt_pos):
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self.GotoPos(self.current_prompt_pos)
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else:
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event.Skip()
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catched = True
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elif event.KeyCode in (wx.WXK_LEFT, wx.WXK_BACK):
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if self.GetCurrentPos() > self.current_prompt_pos:
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event.Skip()
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catched = True
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if skip and not catched:
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# Put the cursor back in the edit region
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if self.GetCurrentPos() < self.current_prompt_pos:
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self.GotoPos(self.current_prompt_pos)
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else:
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event.Skip()
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return catched
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def _on_key_up(self, event, skip=True):
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""" If cursor is outside the editing region, put it back.
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"""
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event.Skip()
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if self.GetCurrentPos() < self.current_prompt_pos:
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self.GotoPos(self.current_prompt_pos)
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if __name__ == '__main__':
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# Some simple code to test the console widget.
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class MainWindow(wx.Frame):
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def __init__(self, parent, id, title):
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wx.Frame.__init__(self, parent, id, title, size=(300,250))
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self._sizer = wx.BoxSizer(wx.VERTICAL)
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self.console_widget = ConsoleWidget(self)
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self._sizer.Add(self.console_widget, 1, wx.EXPAND)
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self.SetSizer(self._sizer)
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self.SetAutoLayout(1)
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self.Show(True)
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app = wx.PySimpleApp()
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w = MainWindow(None, wx.ID_ANY, 'ConsoleWidget')
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w.SetSize((780, 460))
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w.Show()
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app.MainLoop()
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