forked from openlp/openlp
173 lines
7.7 KiB
Python
173 lines
7.7 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2010 Raoul Snyman #
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# Portions copyright (c) 2008-2010 Tim Bentley, Jonathan Corwin, Michael #
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# Gorven, Scott Guerrieri, Meinert Jordan, Andreas Preikschat, Christian #
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# Richter, Philip Ridout, Maikel Stuivenberg, Martin Thompson, Jon Tibble, #
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# Carsten Tinggaard, Frode Woldsund #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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"""
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The :mod:`wowimport` module provides the functionality for importing Words of
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Worship songs into the OpenLP database.
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"""
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import os
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import logging
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from openlp.plugins.songs.lib.songimport import SongImport
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BLOCK_TYPES = (u'V', u'C', u'B')
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log = logging.getLogger(__name__)
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class WowImport(SongImport):
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"""
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The :class:`WowImport` class provides the ability to import song files from
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Words of Worship.
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**Words Of Worship Song File Format:**
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The Words Of Worship song file format is as follows:
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* The song title is the file name minus the extension.
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* The song has a header, a number of blocks, followed by footer containing
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the author and the copyright.
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* A block can be a verse, chorus or bridge.
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File Header:
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Bytes are counted from one, i.e. the first byte is byte 1. These bytes,
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up to the 56 byte, can change but no real meaning has been found. The
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56th byte specifies how many blocks there are. The first block starts
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with byte 83 after the "CSongDoc::CBlock" declaration.
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Blocks:
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Each block has a starting header, some lines of text, and an ending
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footer. Each block starts with 4 bytes, the first byte specifies how
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many lines are in that block, the next three bytes are null bytes.
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Each block ends with 4 bytes, the first of which defines what type of
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block it is, and the rest which are null bytes:
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* ``NUL`` (0x00) - Verse
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* ``SOH`` (0x01) - Chorus
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* ``STX`` (0x02) - Bridge
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Blocks are seperated by two bytes. The first byte is 0x01, and the
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second byte is 0x80.
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Lines:
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Each line starts with a byte which specifies how long that line is,
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the line text, and ends with a null byte.
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Footer:
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The footer follows on after the last block, the first byte specifies
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the length of the author text, followed by the author text, if
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this byte is null, then there is no author text. The byte after the
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author text specifies the length of the copyright text, followed
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by the copyright text.
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The file is ended with four null bytes.
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Valid extensions for a Words of Worship song file are:
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* .wsg
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* .wow-song
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"""
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def __init__(self, master_manager, **kwargs):
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"""
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Initialise the import.
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``master_manager``
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The song manager for the running OpenLP installation.
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"""
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SongImport.__init__(self, master_manager)
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self.master_manager = master_manager
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if kwargs.has_key(u'filename'):
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self.import_source = kwargs[u'filename']
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if kwargs.has_key(u'filenames'):
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self.import_source = kwargs[u'filenames']
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log.debug(self.import_source)
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def do_import(self):
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"""
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Recieve a single file, or a list of files to import.
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"""
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if isinstance(self.import_source, list):
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self.import_wizard.importProgressBar.setMaximum(
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len(self.import_source))
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for file in self.import_source:
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self.author = u''
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self.copyright = u''
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self.file_name = os.path.split(file)[1]
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self.import_wizard.incrementProgressBar(
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"Importing %s" % (self.file_name), 0)
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# Get the song title
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self.title = self.file_name.rpartition(u'.')[0]
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self.songData = open(file, 'rb')
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if self.songData.read(19) != u'WoW File\nSong Words':
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continue
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# Seek to byte which stores number of blocks in the song
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self.songData.seek(56)
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self.no_of_blocks = ord(self.songData.read(1))
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# Seek to the beging of the first block
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self.songData.seek(82)
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for block in range(self.no_of_blocks):
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self.lines_to_read = ord(self.songData.read(1))
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# Skip 3 nulls to the beginnig of the 1st line
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self.songData.seek(3, os.SEEK_CUR)
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self.block_text = u''
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while self.lines_to_read:
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self.length_of_line = ord(self.songData.read(1))
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self.line_text = unicode(
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self.songData.read(self.length_of_line), u'cp1252')
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self.songData.seek(1, os.SEEK_CUR)
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if self.block_text != u'':
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self.block_text += u'\n'
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self.block_text += self.line_text
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self.lines_to_read -= 1
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self.block_type = BLOCK_TYPES[ord(self.songData.read(1))]
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# Skip 3 nulls at the end of the block
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self.songData.seek(3, os.SEEK_CUR)
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# Blocks are seperated by 2 bytes, skip them, but not if
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# this is the last block!
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if (block + 1) < self.no_of_blocks:
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self.songData.seek(2, os.SEEK_CUR)
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self.add_verse(self.block_text, self.block_type)
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# Now to extact the author
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self.author_length = ord(self.songData.read(1))
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if self.author_length != 0:
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self.author = unicode(
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self.songData.read(self.author_length), u'cp1252')
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# Finally the copyright
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self.copyright_length = ord(self.songData.read(1))
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if self.copyright_length != 0:
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self.copyright = unicode(
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self.songData.read(self.copyright_length), u'cp1252')
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self.parse_author(self.author)
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self.add_copyright(self.copyright)
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self.songData.close()
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self.finish()
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self.import_wizard.incrementProgressBar(
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"Importing %s" % (self.file_name))
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return True
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