stage_director

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#! /usr/bin/env python
# BlinkenArea Stage Director
# Copyright 2013-2014 Stefan Schuermans <stefan@schuermans.info>
# Copyleft: GNU public license - http://www.gnu.org/copyleft/gpl.html
# a blinkenarea.org project - https://www.blinkenarea.org/
import re
from gi.repository import Pango
import time_fmt
class Playlist:
  """ playlist object, reads a playlist form a file and handles the playlist
  entries
  playlist file format:
    - each line is an entry or a stop point: <line> = <entry> | <stop point>
    - entries are played one after another
    - playing halts at stop points
    - <entry> = <name> <whitespace> <duration> <opt_comment>
    - <stop point> = <name> <opt_comment>
    - <name> = [A-Za-Z0-9_]+
    - <duration> = ((<hours>:)?<minutes>:)?<seconds>
    - <hours> = [0-9]+
    - <minutes> = [0-9]+
    - <seconds> = [0-9]+(.[0-9]+)
    - <opt_comment> = <whitespace> "#" <whitespace> <some text>"""
  def __init__(self):
    """create a new, empty playlist object"""
    self.entries = [] # list of entries
                      # entry = dictionary { "type": "normal" or "stop"
                      #                      "name": string, name of entry
                      #                      "durtaion": float, in seconds }
    self.reEntry = re.compile("^\s*([A-Za-z0-9_]+)\s+([0-9:.]+)\s*(#\s*(.*))?$")
    self.reStop = re.compile("^\s*([A-Za-z0-9_]+)\s*(#\s*(.*))?$")
  def read(self, filename):
    """read the playlist from filename, replacing the current playlist"""
    self.entries = []
    try:
      f = open(filename, "r")
      for line in f:
        mEntry = self.reEntry.match(line)
        if mEntry:
          name = mEntry.group(1)
          duration = time_fmt.str2sec(mEntry.group(2))
          if mEntry.group(4) is not None:
            comment = mEntry.group(4)
          else:
 
 
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