"""
Complete implementation of the XDG Icon Spec Version 0.8
http://standards.freedesktop.org/icon-theme-spec/
"""
import os, time
import re
from xdg.IniFile import IniFile, is_ascii
from xdg.BaseDirectory import xdg_data_dirs
from xdg.Exceptions import NoThemeError, debug
import xdg.Config
class IconTheme(IniFile):
"Class to parse and validate IconThemes"
def __init__(self):
IniFile.__init__(self)
def __repr__(self):
return self.name
def parse(self, file):
IniFile.parse(self, file, ["Icon Theme", "KDE Icon Theme"])
self.dir = os.path.dirname(file)
(nil, self.name) = os.path.split(self.dir)
def getDir(self):
return self.dir
# Standard Keys
def getName(self):
return self.get('Name', locale=True)
def getComment(self):
return self.get('Comment', locale=True)
def getInherits(self):
return self.get('Inherits', list=True)
def getDirectories(self):
return self.get('Directories', list=True)
def getScaledDirectories(self):
return self.get('ScaledDirectories', list=True)
def getHidden(self):
return self.get('Hidden', type="boolean")
def getExample(self):
return self.get('Example')
# Per Directory Keys
def getSize(self, directory):
return self.get('Size', type="integer", group=directory)
def getContext(self, directory):
return self.get('Context', group=directory)
def getType(self, directory):
value = self.get('Type', group=directory)
if value:
return value
else:
return "Threshold"
def getMaxSize(self, directory):
value = self.get('MaxSize', type="integer", group=directory)
if value or value == 0:
return value
else:
return self.getSize(directory)
def getMinSize(self, directory):
value = self.get('MinSize', type="integer", group=directory)
if value or value == 0:
return value
else:
return self.getSize(directory)
def getThreshold(self, directory):
value = self.get('Threshold', type="integer", group=directory)
if value or value == 0:
return value
else:
return 2
def getScale(self, directory):
value = self.get('Scale', type="integer", group=directory)
return value or 1
# validation stuff
def checkExtras(self):
# header
if self.defaultGroup == "KDE Icon Theme":
self.warnings.append('[KDE Icon Theme]-Header is deprecated')
# file extension
if self.fileExtension == ".theme":
pass
elif self.fileExtension == ".desktop":
self.warnings.append('.desktop fileExtension is deprecated')
else:
self.warnings.append('Unknown File extension')
# Check required keys
# Name
try:
self.name = self.content[self.defaultGroup]["Name"]
except KeyError:
self.errors.append("Key 'Name' is missing")
# Comment
try:
self.comment = self.content[self.defaultGroup]["Comment"]
except KeyError:
self.errors.append("Key 'Comment' is missing")
# Directories
try:
self.directories = self.content[self.defaultGroup]["Directories"]
except KeyError:
self.errors.append("Key 'Directories' is missing")
def checkGroup(self, group):
# check if group header is valid
if group == self.defaultGroup:
try:
self.name = self.content[group]["Name"]
except KeyError:
self.errors.append("Key 'Name' in Group '%s' is missing" % group)
try:
self.name = self.content[group]["Comment"]
except KeyError:
self.errors.append("Key 'Comment' in Group '%s' is missing" % group)
elif group in self.getDirectories():
try:
self.type = self.content[group]["Type"]
except KeyError:
self.type = "Threshold"
try:
self.name = self.content[group]["Size"]
except KeyError:
self.errors.append("Key 'Size' in Group '%s' is missing" % group)
elif not (re.match("^\[X-", group) and is_ascii(group)):
self.errors.append("Invalid Group name: %s" % group)
def checkKey(self, key, value, group):
# standard keys
if group == self.defaultGroup:
if re.match("^Name"+xdg.Locale.regex+"$", key):
pass
elif re.match("^Comment"+xdg.Locale.regex+"$", key):
pass
elif key == "Inherits":
self.checkValue(key, value, list=True)
elif key == "Directories":
self.checkValue(key, value, list=True)
elif key == "ScaledDirectories":
self.checkValue(key, value, list=True)
elif key == "Hidden":
self.checkValue(key, value, type="boolean")
elif key == "Example":
self.checkValue(key, value)
elif re.match("^X-[a-zA-Z0-9-]+", key):
pass
else:
self.errors.append("Invalid key: %s" % key)
elif group in self.getDirectories():
if key == "Size":
self.checkValue(key, value, type="integer")
elif key == "Context":
self.checkValue(key, value)
elif key == "Type":
self.checkValue(key, value)
if value not in ["Fixed", "Scalable", "Threshold"]:
self.errors.append("Key 'Type' must be one out of 'Fixed','Scalable','Threshold', but is %s" % value)
elif key == "MaxSize":
self.checkValue(key, value, type="integer")
if self.type != "Scalable":
self.errors.append("Key 'MaxSize' give, but Type is %s" % self.type)
elif key == "MinSize":
self.checkValue(key, value, type="integer")
if self.type != "Scalable":
self.errors.append("Key 'MinSize' give, but Type is %s" % self.type)
elif key == "Threshold":
self.checkValue(key, value, type="integer")
if self.type != "Threshold":
self.errors.append("Key 'Threshold' give, but Type is %s" % self.type)
elif key == "Scale":
self.checkValue(key, value, type="integer")
elif re.match("^X-[a-zA-Z0-9-]+", key):
pass
else:
self.errors.append("Invalid key: %s" % key)
class IconData(IniFile):
"Class to parse and validate IconData Files"
def __init__(self):
IniFile.__init__(self)
def __repr__(self):
displayname = self.getDisplayName()
if displayname:
return "<IconData: %s>" % displayname
else:
return "<IconData>"
def parse(self, file):
IniFile.parse(self, file, ["Icon Data"])
# Standard Keys
def getDisplayName(self):
"""Retrieve the display name from the icon data, if one is specified."""
return self.get('DisplayName', locale=True)
def getEmbeddedTextRectangle(self):
"""Retrieve the embedded text rectangle from the icon data as a list of
numbers (x0, y0, x1, y1), if it is specified."""
return self.get('EmbeddedTextRectangle', type="integer", list=True)
def getAttachPoints(self):
"""Retrieve the anchor points for overlays & emblems from the icon data,
as a list of co-ordinate pairs, if they are specified."""
return self.get('AttachPoints', type="point", list=True)
# validation stuff
def checkExtras(self):
# file extension
if self.fileExtension != ".icon":
self.warnings.append('Unknown File extension')
def checkGroup(self, group):
# check if group header is valid
if not (group == self.defaultGroup \
or (re.match("^\[X-", group) and is_ascii(group))):
self.errors.append("Invalid Group name: %s" % group.encode("ascii", "replace"))
def checkKey(self, key, value, group):
# standard keys
if re.match("^DisplayName"+xdg.Locale.regex+"$", key):
pass
elif key == "EmbeddedTextRectangle":
self.checkValue(key, value, type="integer", list=True)
elif key == "AttachPoints":
self.checkValue(key, value, type="point", list=True)
elif re.match("^X-[a-zA-Z0-9-]+", key):
pass
else:
self.errors.append("Invalid key: %s" % key)
icondirs = []
for basedir in xdg_data_dirs:
icondirs.append(os.path.join(basedir, "icons"))
icondirs.append(os.path.join(basedir, "pixmaps"))
icondirs.append(os.path.expanduser("~/.icons"))
# just cache variables, they give a 10x speed improvement
themes = []
theme_cache = {}
dir_cache = {}
icon_cache = {}
def getIconPath(iconname, size = None, theme = None, extensions = ["png", "svg", "xpm"]):
"""Get the path to a specified icon.
size :
Icon size in pixels. Defaults to ``xdg.Config.icon_size``.
theme :
Icon theme name. Defaults to ``xdg.Config.icon_theme``. If the icon isn't
found in the specified theme, it will be looked up in the basic 'hicolor'
theme.
extensions :
List of preferred file extensions.
Example::
>>> getIconPath("inkscape", 32)
'/usr/share/icons/hicolor/32x32/apps/inkscape.png'
"""
global themes
if size == None:
size = xdg.Config.icon_size
if theme == None:
theme = xdg.Config.icon_theme
# if we have an absolute path, just return it
if os.path.isabs(iconname):
return iconname
# check if it has an extension and strip it
if os.path.splitext(iconname)[1][1:] in extensions:
iconname = os.path.splitext(iconname)[0]
# parse theme files
if (themes == []) or (themes[0].name != theme):
themes = list(__get_themes(theme))
# more caching (icon looked up in the last 5 seconds?)
tmp = (iconname, size, theme, tuple(extensions))
try:
timestamp, icon = icon_cache[tmp]
except KeyError:
pass
else:
if (time.time() - timestamp) >= xdg.Config.cache_time:
del icon_cache[tmp]
else:
return icon
for thme in themes:
icon = LookupIcon(iconname, size, thme, extensions)
if icon:
icon_cache[tmp] = (time.time(), icon)
return icon
# cache stuff again (directories looked up in the last 5 seconds?)
for directory in icondirs:
if (directory not in dir_cache \
or (int(time.time() - dir_cache[directory][1]) >= xdg.Config.cache_time \
and dir_cache[directory][2] < os.path.getmtime(directory))) \
and os.path.isdir(directory):
dir_cache[directory] = (os.listdir(directory), time.time(), os.path.getmtime(directory))
for dir, values in dir_cache.items():
for extension in extensions:
try:
if iconname + "." + extension in values[0]:
icon = os.path.join(dir, iconname + "." + extension)
icon_cache[tmp] = [time.time(), icon]
return icon
except UnicodeDecodeError as e:
if debug:
raise e
else:
pass
# we haven't found anything? "hicolor" is our fallback
if theme != "hicolor":
icon = getIconPath(iconname, size, "hicolor")
icon_cache[tmp] = [time.time(), icon]
return icon
def getIconData(path):
"""Retrieve the data from the .icon file corresponding to the given file. If
there is no .icon file, it returns None.
Example::
getIconData("/usr/share/icons/Tango/scalable/places/folder.svg")
"""
if os.path.isfile(path):
icon_file = os.path.splitext(path)[0] + ".icon"
if os.path.isfile(icon_file):
data = IconData()
data.parse(icon_file)
return data
def __get_themes(themename):
"""Generator yielding IconTheme objects for a specified theme and any themes
from which it inherits.
"""
for dir in icondirs:
theme_file = os.path.join(dir, themename, "index.theme")
if os.path.isfile(theme_file):
break
theme_file = os.path.join(dir, themename, "index.desktop")
if os.path.isfile(theme_file):
break
else:
if debug:
raise NoThemeError(themename)
return
theme = IconTheme()
theme.parse(theme_file)
yield theme
for subtheme in theme.getInherits():
for t in __get_themes(subtheme):
yield t
def LookupIcon(iconname, size, theme, extensions):
# look for the cache
if theme.name not in theme_cache:
theme_cache[theme.name] = []
theme_cache[theme.name].append(time.time() - (xdg.Config.cache_time + 1)) # [0] last time of lookup
theme_cache[theme.name].append(0) # [1] mtime
theme_cache[theme.name].append(dict()) # [2] dir: [subdir, [items]]
# cache stuff (directory lookuped up the in the last 5 seconds?)
if int(time.time() - theme_cache[theme.name][0]) >= xdg.Config.cache_time:
theme_cache[theme.name][0] = time.time()
for subdir in theme.getDirectories():
for directory in icondirs:
dir = os.path.join(directory,theme.name,subdir)
if (dir not in theme_cache[theme.name][2] \
or theme_cache[theme.name][1] < os.path.getmtime(os.path.join(directory,theme.name))) \
and subdir != "" \
and os.path.isdir(dir):
theme_cache[theme.name][2][dir] = [subdir, os.listdir(dir)]
theme_cache[theme.name][1] = os.path.getmtime(os.path.join(directory,theme.name))
for dir, values in theme_cache[theme.name][2].items():
if DirectoryMatchesSize(values[0], size, theme):
for extension in extensions:
if iconname + "." + extension in values[1]:
return os.path.join(dir, iconname + "." + extension)
minimal_size = 2**31
closest_filename = ""
for dir, values in theme_cache[theme.name][2].items():
distance = DirectorySizeDistance(values[0], size, theme)
if distance < minimal_size:
for extension in extensions:
if iconname + "." + extension in values[1]:
closest_filename = os.path.join(dir, iconname + "." + extension)
minimal_size = distance
return closest_filename
def DirectoryMatchesSize(subdir, iconsize, theme):
Type = theme.getType(subdir)
Size = theme.getSize(subdir)
Threshold = theme.getThreshold(subdir)
MinSize = theme.getMinSize(subdir)
MaxSize = theme.getMaxSize(subdir)
if Type == "Fixed":
return Size == iconsize
elif Type == "Scaleable":
return MinSize <= iconsize <= MaxSize
elif Type == "Threshold":
return Size - Threshold <= iconsize <= Size + Threshold
def DirectorySizeDistance(subdir, iconsize, theme):
Type = theme.getType(subdir)
Size = theme.getSize(subdir)
Threshold = theme.getThreshold(subdir)
MinSize = theme.getMinSize(subdir)
MaxSize = theme.getMaxSize(subdir)
if Type == "Fixed":
return abs(Size - iconsize)
elif Type == "Scalable":
if iconsize < MinSize:
return MinSize - iconsize
elif iconsize > MaxSize:
return MaxSize - iconsize
return 0
elif Type == "Threshold":
if iconsize < Size - Threshold:
return MinSize - iconsize
elif iconsize > Size + Threshold:
return iconsize - MaxSize
return 0