
##################################################################
##
## Interactive Shell Window
##

import sys
import code
import string

import win32ui
import win32api
import win32con
import traceback
import afxres
import array
import __main__

import pywin.scintilla.formatter
import pywin.scintilla.control
import pywin.scintilla.IDLEenvironment
import pywin.framework.app

trace=pywin.scintilla.formatter.trace

import winout

import re
# from IDLE.
_is_block_opener = re.compile(r":\s*(#.*)?$").search
_is_block_closer = re.compile(r"""
    \s*
    ( return
    | break
    | continue
    | raise
    | pass
    )
    \b
""", re.VERBOSE).match

tracebackHeader = "Traceback ("

sectionProfile = "Interactive Window"
valueFormatTitle = "FormatTitle"
valueFormatInput = "FormatInput"
valueFormatOutput = "FormatOutput"
valueFormatOutputError = "FormatOutputError"

# These are defaults only.  Values are read from the registry.
formatTitle = (-536870897, 0, 220, 0, 16711680, 184, 34, 'Arial')
formatInput =  (-402653169, 0, 200, 0, 0, 0, 49, 'Courier New')
formatOutput =  (-402653169, 0, 200, 0, 8421376, 0, 49, 'Courier New')
formatOutputError = (-402653169, 0, 200, 0, 255, 0, 49, 'Courier New')

# couple of exceptions defined for this module
excNoValidCommand = 'No Valid Command'
excEmptyCommand = 'Empty Command'
excContinueCommand = 'Continue Command'

try:
	sys.ps1
except AttributeError:
	sys.ps1 = '>>> '
	sys.ps2 = '... '

def LoadPreference(preference, default = ""):
	return win32ui.GetProfileVal(sectionProfile, preference, default)

def SavePreference( prefName, prefValue ):
	win32ui.WriteProfileVal( sectionProfile, prefName, prefValue )

def GetPromptPrefix(line):
	ps1=sys.ps1
	if line[:len(ps1)]==ps1: return ps1
	ps2=sys.ps2
	if line[:len(ps2)]==ps2: return ps2

#############################################################
#
# Colorizer related code.
#
#############################################################
STYLE_INTERACTIVE_EOL = "Interactive EOL"
STYLE_INTERACTIVE_OUTPUT = "Interactive Output"
STYLE_INTERACTIVE_PROMPT = "Interactive Prompt"
STYLE_INTERACTIVE_BANNER = "Interactive Banner"
STYLE_INTERACTIVE_ERROR = "Interactive Error"
STYLE_INTERACTIVE_ERROR_FINALLINE = "Interactive Error (final line)"

INTERACTIVE_STYLES = [STYLE_INTERACTIVE_EOL, STYLE_INTERACTIVE_OUTPUT, STYLE_INTERACTIVE_PROMPT, STYLE_INTERACTIVE_BANNER, STYLE_INTERACTIVE_ERROR, STYLE_INTERACTIVE_ERROR_FINALLINE]

FormatterParent = pywin.scintilla.formatter.PythonSourceFormatter
class InteractiveFormatter(FormatterParent):
	def __init__(self, scintilla):
		FormatterParent.__init__(self, scintilla)

	def SetStyles(self):
		FormatterParent.SetStyles(self)
		Style = pywin.scintilla.formatter.Style
		self.RegisterStyle( Style(STYLE_INTERACTIVE_EOL, STYLE_INTERACTIVE_PROMPT ) )
		self.RegisterStyle( Style(STYLE_INTERACTIVE_PROMPT, formatInput ) )
		self.RegisterStyle( Style(STYLE_INTERACTIVE_OUTPUT, formatOutput) )
		self.RegisterStyle( Style(STYLE_INTERACTIVE_BANNER, formatTitle ) )
		self.RegisterStyle( Style(STYLE_INTERACTIVE_ERROR, formatOutputError ) )
		self.RegisterStyle( Style(STYLE_INTERACTIVE_ERROR_FINALLINE, STYLE_INTERACTIVE_ERROR ) )

	def LoadPreference(self, name, default):
		rc = win32ui.GetProfileVal("Format", name, default)
		if rc==default:
			rc = win32ui.GetProfileVal(sectionProfile, name, default)
		return rc

	def ColorizeInteractiveCode(self, cdoc, styleStart, stylePyStart):
		lengthDoc = len(cdoc)
		if lengthDoc == 0: return
		state = styleStart
		chNext = cdoc[0]
		startSeg = 0
		i = 0
		lastState=state # debug only
		while i < lengthDoc:
			ch = chNext
			chNext = cdoc[i+1:i+2]
			
#			trace("ch=%r, i=%d, next=%r, state=%s" % (ch, i, chNext, state))
			if state == STYLE_INTERACTIVE_EOL:
				if ch not in '\r\n':
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					if ch in [sys.ps1[0], sys.ps2[0]]:
						state = STYLE_INTERACTIVE_PROMPT
					elif cdoc[i:i+len(tracebackHeader)]==tracebackHeader:
						state = STYLE_INTERACTIVE_ERROR
					else:
						state = STYLE_INTERACTIVE_OUTPUT
			elif state == STYLE_INTERACTIVE_PROMPT:
				if ch not in sys.ps1 + sys.ps2 + " ":
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					if ch in '\r\n':
						state = STYLE_INTERACTIVE_EOL
					else:
						state = stylePyStart # Start coloring Python code.
			elif state in [STYLE_INTERACTIVE_OUTPUT]:
				if ch in '\r\n':
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					state = STYLE_INTERACTIVE_EOL
			elif state == STYLE_INTERACTIVE_ERROR:
				if ch in '\r\n' and chNext and chNext not in string.whitespace:
					# Everything including me
					self.ColorSeg(startSeg, i, state)
					startSeg = i+1
					state = STYLE_INTERACTIVE_ERROR_FINALLINE
				elif i == 0 and ch not in string.whitespace:
					# If we are coloring from the start of a line,
					# we need this better check for the last line
					# Color up to not including me
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					state = STYLE_INTERACTIVE_ERROR_FINALLINE
			elif state == STYLE_INTERACTIVE_ERROR_FINALLINE:
				if ch in '\r\n':
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					state = STYLE_INTERACTIVE_EOL
			elif state == STYLE_INTERACTIVE_BANNER:
				if ch in '\r\n' and (chNext=='' or chNext in ">["):
					# Everything including me
					self.ColorSeg(startSeg, i-1, state)
					startSeg = i
					state = STYLE_INTERACTIVE_EOL
			else:
				# It is a PythonColorizer state - seek past the end of the line
				# and ask the Python colorizer to color that.
				end = startSeg
				while end < lengthDoc and cdoc[end] not in '\r\n':
					end = end + 1
				self.ColorizePythonCode( cdoc[:end], startSeg, state)
				stylePyStart = self.GetStringStyle(end-1)
				if stylePyStart is None:
					stylePyStart = pywin.scintilla.formatter.STYLE_DEFAULT
				else:
					stylePyStart = stylePyStart.name
				startSeg =end
				i = end - 1 # ready for increment.
				chNext = cdoc[end:end+1]
				state = STYLE_INTERACTIVE_EOL
			if lastState != state:
				lastState = state
			i = i + 1
		# and the rest
		if startSeg<i:
			self.ColorSeg(startSeg, i-1, state)

	def Colorize(self, start=0, end=-1):
		stringVal = self.scintilla.GetTextRange(start, end)
		styleStart = None
		stylePyStart = None
		if start > 1:
			# Likely we are being asked to color from the start of the line.
			# We find the last formatted character on the previous line.
			# If TQString, we continue it.  Otherwise, we reset.
			look = start -1
			while look and self.scintilla.SCIGetCharAt(look) in '\n\r':
				look = look - 1
			if look and look < start-1: # Did we find a char before the \n\r sets?
				strstyle = self.GetStringStyle(look)
				quote_char = None
				if strstyle is not None:
					if strstyle.name == pywin.scintilla.formatter.STYLE_TQSSTRING:
						quote_char = "'"
					elif strstyle.name == pywin.scintilla.formatter.STYLE_TQDSTRING:
						quote_char = '"'
					if quote_char is not None:
						# It is a TQS.  If the TQS is not terminated, we
						# carry the style through.
						if look > 2:
							look_str = self.scintilla.SCIGetCharAt(look-2) + self.scintilla.SCIGetCharAt(look-1) + self.scintilla.SCIGetCharAt(look)
							if look_str != quote_char * 3:
								stylePyStart = strstyle.name
		if stylePyStart is None: stylePyStart =  pywin.scintilla.formatter.STYLE_DEFAULT

		if start > 0:
			stylenum = self.scintilla.SCIGetStyleAt(start - 1)
			styleStart = self.GetStyleByNum(stylenum).name
		else:
			styleStart = STYLE_INTERACTIVE_BANNER
		self.scintilla.SCIStartStyling(start, 31)
		self.style_buffer = array.array("c", chr(0)*len(stringVal))
		self.ColorizeInteractiveCode(stringVal, styleStart, stylePyStart)
		self.scintilla.SCISetStylingEx(self.style_buffer)
		self.style_buffer = None

###############################################################
#
# This class handles the Python interactive interpreter.
#
# It uses a basic EditWindow, and does all the magic.
# This is triggered by the enter key hander attached by the
# start-up code.  It determines if a command is to be executed
# or continued (ie, emit "... ") by snooping around the current
# line, looking for the prompts
#
class PythonwinInteractiveInterpreter(code.InteractiveInterpreter):
	def __init__(self, locals = None, globals = None):
		if locals is None: locals = __main__.__dict__
		if globals is None: globals = locals
		self.globals = globals
		code.InteractiveInterpreter.__init__(self, locals)
	def showsyntaxerror(self, filename=None):
		sys.stderr.write(tracebackHeader) # So the color syntaxer recognises it.
		code.InteractiveInterpreter.showsyntaxerror(self, filename)
	def runcode(self, code):
		try:
			exec code in self.globals, self.locals
		except SystemExit:
			raise
		except:
			self.showtraceback()

class InteractiveCore:
	def __init__(self, banner = None):
		self.banner = banner
#		LoadFontPreferences()
	def Init(self):
		self.oldStdOut = self.oldStdErr = None

#		self.SetWordWrap(win32ui.CRichEditView_WrapNone)
		self.interp = PythonwinInteractiveInterpreter()

		self.OutputGrab()	# Release at cleanup.

		if self.GetTextLength()==0:
			if self.banner is None:
				suffix = ""
				if win32ui.debug: suffix = ", debug build"
				sys.stderr.write("PythonWin %s on %s%s.\n" % (sys.version, sys.platform, suffix) )
				sys.stderr.write("Portions %s - see 'Help/About PythonWin' for further copyright information.\n" % (win32ui.copyright,) )
			else:
				sys.stderr.write(banner)
		self.AppendToPrompt([])

	def SetContext(self, globals, locals, name = "Dbg"):
		oldPrompt = sys.ps1
		if globals is None:
			# Reset
			sys.ps1 = ">>> "
			sys.ps2 = "... "
			locals = globals = __main__.__dict__
		else:
			sys.ps1 = "[%s]>>> " % name
			sys.ps2 = "[%s]... " % name
		self.interp.locals = locals
		self.interp.globals = globals
		self.AppendToPrompt([], oldPrompt)

	def GetContext(self):
		return self.interp.globals, self.interp.locals

	def DoGetLine(self, line=-1):
		if line==-1: line = self.LineFromChar()
		line = self.GetLine(line)
		if pywin.is_platform_unicode:
			try:
				line = unicode(line, pywin.default_scintilla_encoding).encode(pywin.default_platform_encoding)
			except:
				# We should fix the underlying problem rather than always masking errors
				# so make it complain.
				print "Unicode error converting", repr(line)
				line = unicode(line, pywin.default_scintilla_encoding, "ignore").encode(pywin.default_platform_encoding)

		while line and line[-1] in ['\r', '\n']:
			line = line[:-1]
		return line
	def AppendToPrompt(self,bufLines, oldPrompt = None):
		" Take a command and stick it at the end of the buffer (with python prompts inserted if required)."
		self.flush()
		lastLineNo = self.GetLineCount()-1
		line = self.DoGetLine(lastLineNo)
		if oldPrompt and line==oldPrompt:
			self.SetSel(self.GetTextLength()-len(oldPrompt), self.GetTextLength())
			self.ReplaceSel(sys.ps1)
		elif (line!=str(sys.ps1)):
			if len(line)!=0: self.write('\n')
			self.write(sys.ps1)
		self.flush()
		self.idle.text.mark_set("iomark", "end-1c")
		if not bufLines:
			return
		terms = (["\n" + sys.ps2] * (len(bufLines)-1)) + ['']
		for bufLine, term in map(None, bufLines, terms):
			if string.strip(bufLine):
				self.write( bufLine + term )
		self.flush()

	def EnsureNoPrompt(self):
		# Get ready to write some text NOT at a Python prompt.
		self.flush()
		lastLineNo = self.GetLineCount()-1
		line = self.DoGetLine(lastLineNo)
		if not line or line in [sys.ps1, sys.ps2]:
			self.SetSel(self.GetTextLength()-len(line), self.GetTextLength())
			self.ReplaceSel('')
		else:
			# Just add a new line.
			self.write('\n')
		
	def _GetSubConfigNames(self):
		return ["interactive"] # Allow [Keys:Interactive] sections to be specific

	def HookHandlers(self):
		# Hook menu command (executed when a menu item with that ID is selected from a menu/toolbar
		self.HookCommand(self.OnSelectBlock, win32ui.ID_EDIT_SELECT_BLOCK)
		mod = pywin.scintilla.IDLEenvironment.GetIDLEModule("IdleHistory")
		if mod is not None:
			self.history = mod.History(self.idle.text, "\n" + sys.ps2)
		else:
			self.history = None
		# hack for now for event handling.

	# GetBlockBoundary takes a line number, and will return the
	# start and and line numbers of the block, and a flag indicating if the
	# block is a Python code block.
	# If the line specified has a Python prompt, then the lines are parsed
	# backwards and forwards, and the flag is true.
	# If the line does not start with a prompt, the block is searched forward
	# and backward until a prompt _is_ found, and all lines in between without
	# prompts are returned, and the flag is false.
	def GetBlockBoundary( self, lineNo ):
		line = self.DoGetLine(lineNo)
		maxLineNo = self.GetLineCount()-1
		prefix = GetPromptPrefix(line)
		if prefix is None:        # Non code block
			flag = 0
			startLineNo = lineNo
			while startLineNo>0:
				if GetPromptPrefix(self.DoGetLine(startLineNo-1)) is not None:
					break                     # there _is_ a prompt
				startLineNo = startLineNo-1
			endLineNo = lineNo
			while endLineNo<maxLineNo:
				if GetPromptPrefix(self.DoGetLine(endLineNo+1)) is not None:
					break                     # there _is_ a prompt
				endLineNo = endLineNo+1
		else:                                    # Code block
			flag = 1
			startLineNo = lineNo
			while startLineNo>0 and prefix!=str(sys.ps1):
				prefix = GetPromptPrefix(self.DoGetLine(startLineNo-1))
				if prefix is None:
					break;	# there is no prompt.
				startLineNo = startLineNo - 1
			endLineNo = lineNo
			while endLineNo<maxLineNo:
				prefix = GetPromptPrefix(self.DoGetLine(endLineNo+1))
				if prefix is None:
					break	# there is no prompt
				if prefix==str(sys.ps1):
					break	# this is another command
				endLineNo = endLineNo+1
				# continue until end of buffer, or no prompt
		return (startLineNo, endLineNo, flag)

	def ExtractCommand( self, lines ):
		start, end = lines
		retList = []
		while end >= start:
			thisLine = self.DoGetLine(end)
			promptLen = len(GetPromptPrefix(thisLine))
			retList = [thisLine[promptLen:]] + retList
			end = end-1
		return retList

	def OutputGrab(self):
#		import win32traceutil; return
		self.oldStdOut = sys.stdout
		self.oldStdErr = sys.stderr
		sys.stdout=self
		sys.stderr=self
		self.flush()

	def OutputRelease(self):
		# a command may have overwritten these - only restore if not.
		if self.oldStdOut is not None:
			if sys.stdout == self:
				sys.stdout=self.oldStdOut
		if self.oldStdErr is not None:
			if sys.stderr == self:
				sys.stderr=self.oldStdErr
		self.oldStdOut = None
		self.oldStdErr = None
		self.flush()

	###################################
	#
	# Message/Command/Key Hooks.
	#
	# Enter key handler
	#
	def ProcessEnterEvent(self, event ):
		self.SCICancel()
		# First, check for an error message
		haveGrabbedOutput = 0
		if self.HandleSpecialLine(): return 0

		lineNo = self.LineFromChar()
		start, end, isCode = self.GetBlockBoundary(lineNo)
		# If we are not in a code block just go to the prompt (or create a new one)
		if not isCode:
			self.AppendToPrompt([])
			win32ui.SetStatusText(win32ui.LoadString(afxres.AFX_IDS_IDLEMESSAGE))
			return

		lines = self.ExtractCommand((start,end))

		# If we are in a code-block, but it isnt at the end of the buffer
		# then copy it to the end ready for editing and subsequent execution
		if end!=self.GetLineCount()-1:
			win32ui.SetStatusText('Press ENTER to execute command')
			self.AppendToPrompt(lines)
			self.SetSel(-2)
			return

		# If SHIFT held down, we want new code here and now!
		bNeedIndent = win32api.GetKeyState(win32con.VK_SHIFT)<0 or win32api.GetKeyState(win32con.VK_CONTROL)<0
		if bNeedIndent:
			self.ReplaceSel("\n")
		else:
			self.SetSel(-2)
			self.ReplaceSel("\n")
			source = string.join(lines, '\n')
			while source and source[-1] in '\t ':
				source = source[:-1]
			self.OutputGrab()	# grab the output for the command exec.
			try:
				if self.interp.runsource(source, "<interactive input>"): # Need more input!
					bNeedIndent = 1
				else:
					# If the last line isnt empty, append a newline
					if self.history is not None:
						self.history.history_store(source)
					self.AppendToPrompt([])
					win32ui.SetStatusText(win32ui.LoadString(afxres.AFX_IDS_IDLEMESSAGE))
#					win32ui.SetStatusText('Successfully executed statement')
			finally:
				self.OutputRelease()
		if bNeedIndent:
			win32ui.SetStatusText('Ready to continue the command')
			# Now attempt correct indentation (should use IDLE?)
			curLine = self.DoGetLine(lineNo)[len(sys.ps2):]
			pos = 0
			indent=''
			while len(curLine)>pos and curLine[pos] in string.whitespace:
				indent = indent + curLine[pos]
				pos = pos + 1
			if _is_block_opener(curLine):
				indent = indent + '\t'
			elif _is_block_closer(curLine):
				indent = indent[:-1]
			# use ReplaceSel to ensure it goes at the cursor rather than end of buffer.
			self.ReplaceSel(sys.ps2+indent)
		return 0

	# ESC key handler
	def ProcessEscEvent(self, event):
		# Implement a cancel.
		if self.SCIAutoCActive() or self.SCICallTipActive():
			self.SCICancel()
		else:
			win32ui.SetStatusText('Cancelled.')
			self.AppendToPrompt(('',))
		return 0

	def OnSelectBlock(self,command, code):
		lineNo = self.LineFromChar()
		start, end, isCode = self.GetBlockBoundary(lineNo)
		startIndex = self.LineIndex(start)
		endIndex = self.LineIndex(end+1)-2	# skip \r + \n
		if endIndex<0:	# must be beyond end of buffer
			endIndex = -2	# self.Length()
		self.SetSel(startIndex,endIndex)

	def GetRightMenuItems(self):
		# Just override parents
		ret = []
		flags = 0
		ret.append((flags, win32ui.ID_EDIT_UNDO, '&Undo'))
		ret.append(win32con.MF_SEPARATOR)
		ret.append((flags, win32ui.ID_EDIT_CUT, 'Cu&t'))
		ret.append((flags, win32ui.ID_EDIT_COPY, '&Copy'))
		ret.append((flags, win32ui.ID_EDIT_PASTE, '&Paste'))
		ret.append(win32con.MF_SEPARATOR)
		ret.append((flags, win32ui.ID_EDIT_SELECT_ALL, '&Select all'))
		ret.append((flags, win32ui.ID_EDIT_SELECT_BLOCK, 'Select &block'))
		ret.append((flags, win32ui.ID_VIEW_WHITESPACE, "View &Whitespace"))
		return ret

	def MDINextEvent(self, event):
		win32ui.GetMainFrame().MDINext(0)
	def MDIPrevEvent(self, event):
		win32ui.GetMainFrame().MDINext(0)

	def WindowBackEvent(self, event):
		parent = self.GetParentFrame()
		if parent == win32ui.GetMainFrame():
			# It is docked.
			try:
				wnd, isactive = parent.MDIGetActive()
				wnd.SetFocus()
			except win32ui.error:
				# No MDI window active!
				pass
		else:
			# Normal Window
			try:
				lastActive = self.GetParentFrame().lastActive
				# If the window is invalid, reset it.
				if lastActive is not None and (lastActive._obj_ is None or lastActive.GetSafeHwnd()==0):
					lastActive = self.GetParentFrame().lastActive = None
					win32ui.SetStatusText("The last active Window has been closed.")
			except AttributeError:
				print "Can't find the last active window!"
				lastActive = None
			if lastActive is not None:
				lastActive.MDIActivate()

class InteractiveView(InteractiveCore, winout.WindowOutputView):
	def __init__(self,  doc):
		InteractiveCore.__init__(self)
		winout.WindowOutputView.__init__(self, doc)
	def _MakeColorizer(self):
		return InteractiveFormatter(self)
	def OnInitialUpdate(self):
		winout.WindowOutputView.OnInitialUpdate(self)
		self.SetWordWrap()
		self.Init()
	def HookHandlers(self):
		winout.WindowOutputView.HookHandlers(self)
		InteractiveCore.HookHandlers(self)

class CInteractivePython(winout.WindowOutput):
	def __init__(self, makeDoc = None, makeFrame = None):
		self.IsFinalDestroy = 0
		winout.WindowOutput.__init__(self, sectionProfile, sectionProfile, \
		                             winout.flags.WQ_LINE, 1, None, makeDoc, makeFrame, InteractiveView )
		self.Create()

	def OnViewDestroy(self, view):
		if self.IsFinalDestroy:
			view.OutputRelease()
		winout.WindowOutput.OnViewDestroy(self, view)

	def Close(self):
		self.IsFinalDestroy = 1
		winout.WindowOutput.Close(self)

class InteractiveFrame(winout.WindowOutputFrame):
	def __init__(self):
		self.lastActive = None
		winout.WindowOutputFrame.__init__(self)

	def OnMDIActivate(self, bActive, wndActive, wndDeactive):
		if bActive:
			self.lastActive = wndDeactive

######################################################################
## 
## Dockable Window Support
## 
######################################################################
ID_DOCKED_INTERACTIVE_CONTROLBAR = 0xe802

DockedInteractiveViewParent = InteractiveView
class DockedInteractiveView(DockedInteractiveViewParent):
	def HookHandlers(self):
		DockedInteractiveViewParent.HookHandlers(self)
		self.HookMessage(self.OnSetFocus, win32con.WM_SETFOCUS)
		self.HookMessage(self.OnKillFocus, win32con.WM_KILLFOCUS)
	def OnSetFocus(self, msg):
		self.GetParentFrame().SetActiveView(self)
		return 1
	def OnKillFocus(self, msg):
		# If we are losing focus to another in this app, reset the main frame's active view.
		hwnd = wparam = msg[2]
		try:
			wnd = win32ui.CreateWindowFromHandle(hwnd)
			reset  = wnd.GetTopLevelFrame()==self.GetTopLevelFrame()
		except win32ui.error:
			reset = 0 # Not my window
		if reset: self.GetParentFrame().SetActiveView(None)
		return 1
	def OnDestroy(self, msg):
		newSize = self.GetWindowPlacement()[4]
		pywin.framework.app.SaveWindowSize("Interactive Window", newSize, "docked")
		try:
			if self.GetParentFrame().GetActiveView==self:
				self.GetParentFrame().SetActiveView(None)
		except win32ui.error:
			pass
		try:
			if win32ui.GetMainFrame().GetActiveView()==self:
				win32ui.GetMainFrame().SetActiveView(None)
		except win32ui.error:
			pass
		return DockedInteractiveViewParent.OnDestroy(self, msg)

class CDockedInteractivePython(CInteractivePython):
	def __init__(self, dockbar):
		self.bFirstCreated = 0
		self.dockbar = dockbar
		CInteractivePython.__init__(self)
	def NeedRecreateWindow(self):
		if self.bCreating:
			return 0
		try:
				frame = win32ui.GetMainFrame()
				if frame.closing:
					return 0 # Dieing!
		except (win32ui.error, AttributeError):
			return 0 # The app is dieing!
		try:
			cb = frame.GetControlBar(ID_DOCKED_INTERACTIVE_CONTROLBAR)
			return not cb.IsWindowVisible()
		except win32ui.error:
			return 1 # Control bar does not exist!
	def RecreateWindow(self):
		try:
			dockbar = win32ui.GetMainFrame().GetControlBar(ID_DOCKED_INTERACTIVE_CONTROLBAR)
			win32ui.GetMainFrame().ShowControlBar(dockbar, 1, 1)
		except win32ui.error:
			CreateDockedInteractiveWindow()

	def Create(self):
		self.bCreating = 1
		doc = InteractiveDocument(None, self.DoCreateDoc())
		view = DockedInteractiveView(doc)
		defRect = pywin.framework.app.LoadWindowSize("Interactive Window", "docked")
		if defRect[2]-defRect[0]==0:
			defRect = 0, 0, 500, 200
		style = win32con.WS_CHILD | win32con.WS_VISIBLE | win32con.WS_BORDER
		id = 1050 # win32ui.AFX_IDW_PANE_FIRST
		view.CreateWindow(self.dockbar, id, style, defRect)
		view.OnInitialUpdate()
		self.bFirstCreated = 1

		self.currentView = doc.GetFirstView()
		self.bCreating = 0
		if self.title: doc.SetTitle(self.title)

# The factory we pass to the dockable window support.
def InteractiveViewCreator(parent):
	global edit
	edit = CDockedInteractivePython(parent)
	return edit.currentView

def CreateDockedInteractiveWindow():
	# Later, the DockingBar should be capable of hosting multiple
	# children.
	from pywin.docking.DockingBar import DockingBar
	bar = DockingBar()
	creator = InteractiveViewCreator
	bar.CreateWindow(win32ui.GetMainFrame(), creator, "Interactive Window", ID_DOCKED_INTERACTIVE_CONTROLBAR)
	bar.SetBarStyle( bar.GetBarStyle()|afxres.CBRS_TOOLTIPS|afxres.CBRS_FLYBY|afxres.CBRS_SIZE_DYNAMIC)
	bar.EnableDocking(afxres.CBRS_ALIGN_ANY)
	win32ui.GetMainFrame().DockControlBar(bar, afxres.AFX_IDW_DOCKBAR_BOTTOM)

######################################################################
# 
# The public interface to this module.
# 
######################################################################
# No extra functionality now, but maybe later, so
# publicize these names.
InteractiveDocument = winout.WindowOutputDocument

# We remember our one and only interactive window in the "edit" variable.
edit = None

def CreateInteractiveWindowUserPreference(makeDoc = None, makeFrame = None):
	"""Create some sort of interactive window if the user's preference say we should.
	"""
	bCreate = LoadPreference("Show at startup", 1)
	if bCreate:
		CreateInteractiveWindow(makeDoc, makeFrame)

def CreateInteractiveWindow(makeDoc = None, makeFrame = None):
	"""Create a standard or docked interactive window unconditionally
	"""
	assert edit is None, "Creating second interactive window!"
	bDocking = LoadPreference("Docking", 0)
	if bDocking:
		CreateDockedInteractiveWindow()
	else:
		CreateMDIInteractiveWindow(makeDoc, makeFrame)
	assert edit is not None, "Created interactive window, but did not set the global!"
	edit.currentView.SetFocus()

def CreateMDIInteractiveWindow(makeDoc = None, makeFrame = None):
	"""Create a standard (non-docked) interactive window unconditionally
	"""
	global edit
	if makeDoc is None: makeDoc = InteractiveDocument
	if makeFrame is None: makeFrame = InteractiveFrame
	edit = CInteractivePython(makeDoc=makeDoc,makeFrame=makeFrame)

def DestroyInteractiveWindow():
	""" Destroy the interactive window.
	This is different to Closing the window,
	which may automatically re-appear.  Once destroyed, it can never be recreated,
	and a complete new instance must be created (which the various other helper
	functions will then do after making this call
	"""
	global edit
	if edit is not None and edit.currentView is not None:
		if edit.currentView.GetParentFrame() == win32ui.GetMainFrame():
			# It is docked - do nothing now (this is only called at shutdown!)
			pass
		else:
			# It is a standard window - call Close on the container.
			edit.Close()
			edit = None

def CloseInteractiveWindow():
	"""Close the interactive window, allowing it to be re-created on demand.
	"""
	global edit
	if edit is not None and edit.currentView is not None:
		if edit.currentView.GetParentFrame() == win32ui.GetMainFrame():
			# It is docked, just hide the dock bar.
			frame = win32ui.GetMainFrame()
			cb = frame.GetControlBar(ID_DOCKED_INTERACTIVE_CONTROLBAR)
			frame.ShowControlBar(cb, 0, 1)
		else:
			# It is a standard window - destroy the frame/view, allowing the object itself to remain.
			edit.currentView.GetParentFrame().DestroyWindow()

def ToggleInteractiveWindow():
	"""If the interactive window is visible, hide it, otherwise show it.
	"""
	if edit is None:
		CreateInteractiveWindow()
	else:
		if edit.NeedRecreateWindow():
			edit.RecreateWindow()
		else:
			# Close it, allowing a reopen.
			CloseInteractiveWindow()

def ShowInteractiveWindow():
	"""Shows (or creates if necessary) an interactive window"""
	if edit is None:
		CreateInteractiveWindow()
	else:
		if edit.NeedRecreateWindow():
			edit.RecreateWindow()
		else:
			parent = edit.currentView.GetParentFrame()
			if parent == win32ui.GetMainFrame(): # It is docked.
				edit.currentView.SetFocus()
			else: # It is a "normal" window
				edit.currentView.GetParentFrame().AutoRestore()
				win32ui.GetMainFrame().MDIActivate(edit.currentView.GetParentFrame())

def IsInteractiveWindowVisible():
	return edit is not None and not edit.NeedRecreateWindow()
