# Software License Agreement (BSD License)
#
# Copyright (c) 2012, Dorian Scholz
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#
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# modification, are permitted provided that the following conditions
# are met:
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#    notice, this list of conditions and the following disclaimer.
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import sys
from code import InteractiveInterpreter

from python_qt_binding import QT_BINDING, QT_BINDING_VERSION
from python_qt_binding.QtCore import Qt, Signal

from qt_gui_py_common.console_text_edit import ConsoleTextEdit


class PyConsoleTextEdit(ConsoleTextEdit):
    _color_stdin = Qt.darkGreen
    _multi_line_char = ':'
    _multi_line_indent = '    '
    _prompt = ('>>> ', '... ')  # prompt for single and multi line
    exit = Signal()

    def __init__(self, parent=None):
        super(PyConsoleTextEdit, self).__init__(parent)

        self._interpreter_locals = {}
        self._interpreter = InteractiveInterpreter(self._interpreter_locals)

        self._comment_writer.write('Python %s on %s\n' %
                                   (sys.version.replace('\n', ''), sys.platform))
        self._comment_writer.write(
            'Qt bindings: %s version %s\n' % (QT_BINDING, QT_BINDING_VERSION))

        self._add_prompt()

    def update_interpreter_locals(self, newLocals):
        self._interpreter_locals.update(newLocals)

    def _exec_code(self, code):
        try:
            self._interpreter.runsource(code)
        except SystemExit:  # catch sys.exit() calls, so they don't close the whole gui
            self.exit.emit()
