#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
# 
# QGISLite - An Open Source GIS tool based on the QGIS core libraries
# and written in Python
# 
# Copyright (C) 2008  Aaron Racicot, Z-Pulley Inc.
# 
# EMAIL: aaronr (at) z-pulley.com
# WEB  : http://www.reprojected.com
# TRAC : http://trac.reprojected.com/qgislite
# SVN  : http://svn.reprojected.com/qgislite
# 
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
# 
# licensed under the terms of GNU GPL 2
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# 
#--------------------------------------------------------------------------

from PyQt4.QtCore import *
from PyQt4.QtGui import *

from qgislitepy_ui import Ui_QGISLitePythonWin

# General system includes
import sys
from code import *

class MyLineEdit(QLineEdit):
    def __init__(self, *args):
        QLineEdit.__init__(self, *args)
    def event(self, event):
      if (event.type()==QEvent.KeyPress) and (event.key()==Qt.Key_Up):
        self.emit(SIGNAL("updownPressed(PyQt_PyObject)"),Qt.Key_Up)
        return True
      if (event.type()==QEvent.KeyPress) and (event.key()==Qt.Key_Down):
        self.emit(SIGNAL("updownPressed(PyQt_PyObject)"),Qt.Key_Down)
        return True
      return QLineEdit.event(self, event)
      
class QGISLitePythonInterpGui(QDialog, Ui_QGISLitePythonWin):
  def __init__(self, parent, fl):
    QDialog.__init__(self, parent, fl)
    self.setupUi(self)
    self.parent = parent

    self.pythonline = MyLineEdit(self.commandWidget)
    self.pythonline.setEnabled(True)
    self.pythonline.setObjectName("pythonline")
    self.hboxlayout.addWidget(self.pythonline)

    self.console = QGISLitePythonShell(self,self.pythonline,parent.__dict__)
    self.gridlayout.addWidget(self.console)
  def on_pbnFinished_released(self):
    self.close()

class QGISLitePythonShell(QTextBrowser):
  class Output:
    def __init__( self, writefunc ):
      self.writefunc = writefunc
    def write( self, line ):
      if line != "\n":
        map( self.writefunc, line.split("\n") )
    
  def __init__( self, parent, cmdline, localdict={} ):
    QTextBrowser.__init__( self, parent )
    self.history = []
    self.pointer = len(self.history)
    self.cmdline = cmdline
    QObject.connect(self.cmdline, SIGNAL("returnPressed()"),
                    self.returnPressed )
    QObject.connect(self.cmdline, SIGNAL("updownPressed(PyQt_PyObject)"),
                    self.updownPressed )
    self.setFont(QFont("Fixed",10))
    self.console = InteractiveConsole( localdict )
    self.cmdline = cmdline
    sys.ps1 = ">>> "
    sys.ps2 = "... "
    self.append("---- QGISLite Python ----")
    self.append( "Python %s on %s\n" % ( sys.version, sys.platform) )
    self.append("--------")
    self.more, self.prompt = 0, sys.ps1
    self.output = QGISLitePythonShell.Output(self.writeResult)
    self.stdout = sys.stdout
    self.stderr = sys.stderr
    
  def writeResult(self,result):
    if result == "":
      return
    self.append(result)
  
  def processInput(self,line):
    self.append( sys.ps1 + line )
    sys.stdout, sys.stderr = self.output, self.output
    self.more = self.console.push(line)
    sys.stdout, sys.stderr = self.stdout, self.stderr
    
  def returnPressed(self):
    line = str(self.cmdline.text())
    self.history.append(line)
    self.pointer = len(self.history)
    self.cmdline.clear()
    self.processInput( line )
    self.append(QString("--------"))

  def updownPressed(self,updownkey):
    if updownkey == Qt.Key_Down and len(self.history) > 0:
      self.cmdline.clear()
      if self.pointer < (len(self.history) - 1):
        self.pointer = self.pointer + 1
      else:
        self.pointer = 0
      self.cmdline.setText(self.history[self.pointer])
    elif updownkey ==Qt.Key_Up and len(self.history) > 0:
      self.cmdline.clear()
      if self.pointer > 0:
        self.pointer = self.pointer - 1
      else:
        self.pointer = len(self.history) - 1
      self.cmdline.setText(self.history[self.pointer])