# -*- coding: utf-8 -*-

'''Dummy driver.

Implements basic driver interface.

This is useful for debugging or when writing new driver.

@author: Radek Brich <radek.brich@devl.cz>

'''

import logging

from tuikit.common import Size, ClipStack

class DriverDummy:

    '''Dummy driver class'''

    def __init__(self):

        '''Initialize instance attributes'''

        self.log = logging.getLogger('tuikit')

        self.size = Size()

        self.clipstack = ClipStack()

    def start(self, mainfunc):

        '''Start driver and run mainfunc.'''

        self.size.w, self.size.h = 80, 25

        mainfunc()

    # colors

    def setcolor(self, name, desc):

        '''Define color name.

        name - name of color (e.g. 'normal', 'active')

        desc - color description - foreground, background, attributes (e.g. 'black on white, bold')

        '''

        self.log.info('DummyDriver.setcolor(name=%r, desc=%r)', name, desc)

    def pushcolor(self, name):

        self.log.info('DummyDriver.pushcolor(name=%r)', name)

    def popcolor(self):

        self.log.info('DummyDriver.popcolor()')

    # drawing

    def erase(self):

        '''Clear screen.'''

        self.log.info('DummyDriver.erase()')

    def puts(self, x, y, s):

        '''Output string to specified coordinates.'''

        self.log.info('DummyDriver.puts(x=%r, y=%r, s=%r)', x, y, s)

    def commit(self):

        '''Commit changes to the screen.'''

        self.log.info('DummyDriver.commit()')

    # input

    def process_input(self, timeout=None):

        '''Process input, return list of events.

        This dummy implementation just returns 'q' and Escape key presses.

        '''

        events = [('keypress', None, 'q'), ('keypress', 'escape', None)]

        return events