/usr/lib/python3/dist-packages/gnomemusic/albumartcache.py is in gnome-music 3.22.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2013 Arnel A. Borja <kyoushuu@yahoo.com>
# Copyright (c) 2013 Seif Lotfy <seif@lotfy.com>
# Copyright (c) 2013 Guillaume Quintard <guillaume.quintard@gmail.com>
# Copyright (c) 2013 Lubosz Sarnecki <lubosz@gmail.com>
# Copyright (c) 2013 Sai Suman Prayaga <suman.sai14@gmail.com>
#
# GNOME Music is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# GNOME Music is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with GNOME Music; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# The GNOME Music authors hereby grant permission for non-GPL compatible
# GStreamer plugins to be used and distributed together with GStreamer
# and GNOME Music. This permission is above and beyond the permissions
# granted by the GPL license by which GNOME Music is covered. If you
# modify this code, you may extend this exception to your version of the
# code, but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version.
from enum import Enum
import logging
from math import pi
import os
import cairo
from gettext import gettext as _
import gi
gi.require_version('MediaArt', '2.0')
from gi.repository import Gdk, GdkPixbuf, Gio, GLib, GObject, Gtk, MediaArt
from gnomemusic import log
from gnomemusic.grilo import grilo
logger = logging.getLogger(__name__)
@log
def _make_icon_frame(pixbuf):
border = 3
degrees = pi / 180
radius = 3
w = pixbuf.get_width()
h = pixbuf.get_height()
new_pixbuf = pixbuf.scale_simple(w - border * 2,
h - border * 2,
GdkPixbuf.InterpType.HYPER)
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, w, h)
ctx = cairo.Context(surface)
# draw outline
ctx.new_sub_path()
ctx.arc(w - radius, radius, radius - 0.5, -90 * degrees, 0 * degrees)
ctx.arc(w - radius, h - radius, radius - 0.5, 0 * degrees, 90 * degrees)
ctx.arc(radius, h - radius, radius - 0.5, 90 * degrees, 180 * degrees)
ctx.arc(radius, radius, radius - 0.5, 180 * degrees, 270 * degrees)
ctx.close_path()
ctx.set_line_width(0.6)
ctx.set_source_rgb(0.2, 0.2, 0.2)
ctx.stroke_preserve()
# fill the center
ctx.set_source_rgb(1, 1, 1)
ctx.fill()
# paste the scaled pixbuf in the center
Gdk.cairo_set_source_pixbuf(ctx, new_pixbuf, border, border)
ctx.paint()
border_pixbuf = Gdk.pixbuf_get_from_surface(surface, 0, 0, w, h)
return border_pixbuf
class DefaultIcon(GObject.GObject):
"""Provides the symbolic fallback and loading icons."""
class Type(Enum):
loading = 'content-loading-symbolic'
music = 'folder-music-symbolic'
_cache = {}
def __repr__(self):
return '<DefaultIcon>'
@log
def _make_default_icon(self, width, height, icon_type):
icon = Gtk.IconTheme.get_default().load_icon(icon_type.value,
max(width, height) / 4,
0)
# create an empty pixbuf with the requested size
result = GdkPixbuf.Pixbuf.new(icon.get_colorspace(),
True,
icon.get_bits_per_sample(),
width,
height)
result.fill(0xffffffff)
icon.composite(result,
icon.get_width() * 3 / 2,
icon.get_height() * 3 / 2,
icon.get_width(),
icon.get_height(),
icon.get_width() * 3 / 2,
icon.get_height() * 3 / 2,
1, 1, GdkPixbuf.InterpType.HYPER, 0x33)
final_icon = _make_icon_frame(result)
return final_icon
@log
def get(self, width, height, icon_type):
"""Returns the requested symbolic icon
Returns a GdkPixbuf of the requested symbolic icon
in the given size.
:param int width: The width of the icon
:param int height: The height of the icon
:param enum icon_type: The DefaultIcon.Type of the icon
:return: The symbolic icon
:rtype: GdkPixbuf
"""
if (width, height, icon_type) not in self._cache.keys():
new_icon = self._make_default_icon(width, height, icon_type)
self._cache[(width, height, icon_type)] = new_icon
return self._cache[(width, height, icon_type)]
class AlbumArtCache(GObject.GObject):
instance = None
blacklist = {}
def __repr__(self):
return '<AlbumArt>'
@classmethod
def get_default(cls):
if not cls.instance:
cls.instance = AlbumArtCache()
return cls.instance
@staticmethod
def get_media_title(media, escaped=False):
title = media.get_title()
if title:
if escaped:
return GLib.markup_escape_text(title)
else:
return title
uri = media.get_url()
if uri is None:
return _("Untitled")
uri_file = Gio.File.new_for_path(uri)
basename = uri_file.get_basename()
try:
title = GLib.uri_unescape_string(basename, '')
except:
title = _("Untitled")
pass
if escaped:
return GLib.markup_escape_text(title)
return title
@log
def __init__(self):
GObject.GObject.__init__(self)
try:
self.cacheDir = os.path.join(GLib.get_user_cache_dir(), 'media-art')
if not os.path.exists(self.cacheDir):
Gio.file_new_for_path(self.cacheDir).make_directory(None)
except Exception as e:
logger.warn("Error: %s", e)
self.default_icon = DefaultIcon()
@log
def lookup(self, item, width, height, callback, itr, artist, album, first=True):
if artist in self.blacklist and album in self.blacklist[artist]:
self.finish(item, None, None, callback, itr, width, height)
return
try:
[success, thumb_file] = MediaArt.get_file(artist, album, "album")
if success == False:
self.finish(item, None, None, callback, itr, width, height)
return
if not thumb_file.query_exists():
if first:
self.cached_thumb_not_found(item, width, height, thumb_file.get_path(), callback, itr, artist, album)
else:
self.finish(item, None, None, callback, itr, width, height)
return
stream = thumb_file.read_async(GLib.PRIORITY_LOW, None, self.stream_open,
[item, width, height, thumb_file, callback, itr, artist, album])
except Exception as e:
logger.warn("Error: %s, %s", e.__class__, e)
@log
def stream_open(self, thumb_file, result, arguments):
(item, width, height, thumb_file, callback, itr, artist, album) = arguments
try:
width = width or -1
height = height or -1
stream = thumb_file.read_finish (result)
GdkPixbuf.Pixbuf.new_from_stream_at_scale_async(stream, width, height, True, None, self.pixbuf_loaded,
[item, width, height, thumb_file, callback, itr, artist, album])
except Exception as e:
logger.warn("Error: %s, %s", e.__class__, e)
self.finish(item, None, None, callback, itr, width, height)
@log
def pixbuf_loaded(self, stream, result, arguments):
(item, width, height, thumb_file, callback, itr, artist, album) = arguments
try:
pixbuf = GdkPixbuf.Pixbuf.new_from_stream_finish (result)
self.finish(item, _make_icon_frame(pixbuf), thumb_file.get_path(), callback, itr, width, height, artist, album)
except Exception as e:
logger.warn("Error: %s, %s", e.__class__, e)
self.finish(item, None, None, callback, itr, width, height)
@log
def finish(self, item, pixbuf, path, callback, itr, width=-1, height=-1, artist=None, album=None):
if (pixbuf is None and artist is not None):
# Blacklist artist-album combination
if artist not in self.blacklist:
self.blacklist[artist] = []
self.blacklist[artist].append(album)
if pixbuf is None:
pixbuf = self.default_icon.get(width, height, DefaultIcon.Type.music)
try:
if path:
item.set_thumbnail(GLib.filename_to_uri(path, None))
GLib.idle_add(callback, pixbuf, path, itr)
except Exception as e:
logger.warn("Error: %s", e)
@log
def cached_thumb_not_found(self, item, width, height, path, callback, itr, artist, album):
try:
uri = item.get_thumbnail()
if uri is None:
grilo.get_album_art_for_item(item, self.album_art_for_item_callback,
(item, width, height, path, callback, itr, artist, album))
return
self.download_thumb(item, width, height, path, callback, itr, artist, album, uri)
except Exception as e:
logger.warn("Error: %s", e)
self.finish(item, None, None, callback, itr, width, height, artist, album)
@log
def album_art_for_item_callback(self, source, param, item, count, data, error):
old_item, width, height, path, callback, itr, artist, album = data
try:
if item is None:
return
uri = item.get_thumbnail()
if uri is None:
logger.warn("can't find artwork for album '%s' by %s", album, artist)
self.finish(item, None, None, callback, itr, width, height, artist, album)
return
self.download_thumb(item, width, height, path, callback, itr, artist, album, uri)
except Exception as e:
logger.warn("Error: %s", e)
self.finish(item, None, None, callback, itr, width, height, artist, album)
@log
def download_thumb(self, item, width, height, thumb_file, callback, itr, artist, album, uri):
src = Gio.File.new_for_uri(uri)
src.read_async(GLib.PRIORITY_LOW, None, self.open_remote_thumb,
[item, width, height, thumb_file, callback, itr, artist, album])
@log
def open_remote_thumb(self, src, result, arguments):
(item, width, height, thumb_file, callback, itr, artist, album) = arguments
dest = Gio.File.new_for_path(thumb_file)
try:
istream = src.read_finish(result)
dest.replace_async(None, False, Gio.FileCreateFlags.REPLACE_DESTINATION,
GLib.PRIORITY_LOW, None, self.open_local_thumb,
[item, width, height, thumb_file, callback, itr, artist, album, istream])
except Exception as e:
logger.warn("Error: %s", e)
self.finish(item, None, None, callback, itr, width, height, artist, album)
@log
def open_local_thumb(self, dest, result, arguments):
(item, width, height, thumb_file, callback, itr, artist, album, istream) = arguments
try:
ostream = dest.replace_finish(result)
ostream.splice_async(istream,
Gio.OutputStreamSpliceFlags.CLOSE_SOURCE |
Gio.OutputStreamSpliceFlags.CLOSE_TARGET,
GLib.PRIORITY_LOW, None,
self.copy_finished,
[item, width, height, thumb_file, callback, itr, artist, album])
except Exception as e:
logger.warn("Error: %s", e)
self.finish(item, None, None, callback, itr, width, height, artist, album)
@log
def copy_finished(self, ostream, result, arguments):
(item, width, height, thumb_file, callback, itr, artist, album) = arguments
try:
ostream.splice_finish(result)
self.lookup(item, width, height, callback, itr, artist, album, False)
except Exception as e:
logger.warn("Error: %s", e)
self.finish(item, None, None, callback, itr, width, height, artist, album)
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