stage_director

1) #! /usr/bin/env python
2) 

3) # BlinkenArea Sync GUI
4) # version 0.1.0 date 2013-11-23
5) # Copyright 2013 Stefan Schuermans <stefan@blinkenarea.org>
6) # Copyleft: GNU public license - http://www.gnu.org/copyleft/gpl.html
7) # a blinkenarea.org project - https://www.blinkenarea.org/
8) 

9) import re

10) import pango

11) 
12) import time_fmt
13) 
14) class Playlist:

15)   """ playlist object, reads a playlist form a file and handles the playlist
16)   entries
17) 
18)   playlist file format:
19)     - each line is an entry or a stop point: <line> = <entry> | <stop point>
20)     - entries are played one after another
21)     - playing halts at stop points
22)     - <entry> = <name> <whitespace> <duration>
23)     - <stop point> = ""
24)     - <name> = [A-Za-Z0-9_]+
25)     - <duration> = ((<hours>:)?<minutes>:)?<seconds>
26)     - <hours> = [0-9]+
27)     - <minutes> = [0-9]+
28)     - <seconds> = [0-9]+(.[0-9]+)"""
29) 

30)   def __init__(self):

31)     """create a new, empty playlist object"""
32)     self.entries = [] # list of entries
33)                       # entry = dictionary { "type": "normal" or "stop"
34)                       #                      "name": string, name of entry
35)                       #                      "durtaion": float, in seconds }

36)     self.reEntry = re.compile("^\s*([A-Za-z0-9_]+)\s+([0-9:.]+)\s*$")

37) 
38)   def read(self, filename):

39)     """read the playlist from filename, replacing the current playlist"""

40)     self.entries = []
41)     f = open(filename, "r")
42)     for line in f:
43)       mEntry = self.reEntry.match(line)
44)       if mEntry:
45)         name = mEntry.group(1)
46)         duration = time_fmt.str2sec(mEntry.group(2))

47)         self.entries.append({"type":     "normal",
48)                              "name":     name,
49)                              "duration": duration})

50)         #print("DEBUG playlist entry normal %s %f" %
51)         #      (self.entries[-1]["name"], self.entries[-1]["duration"]))

52)       else:

53)         self.entries.append({"type": "stop"})

54)         #print("DEBUG playlist entry stop")

55)     f.close()
56) 

57)   def update(self, store):

58)     """update the contents of a Gtk ListStore with the contents of this
59)     playlist"""

60)     store.clear()

61)     idx = 0

62)     for entry in self.entries:
63)       if entry["type"] == "normal":
64)         name = entry["name"]
65)         duration = time_fmt.sec2str(entry["duration"])
66)       else:
67)         name = ""
68)         duration = "STOP"

69)       store.append([idx, pango.WEIGHT_NORMAL, name, duration])

70)       idx = idx + 1