import os
import os.path
import types
-import xml.dom.minidom
-from . import curve as curve
-from .compat import minidom as minidom # dynamically patch xml.sax.minidom
+import yaml
+from yaml.representer import RepresenterError
+
+from .command_stack import CommandStack
+from .curve import Curve
+from .util.itertools import reverse_enumerate
class NoteIndexList (list):
"""
def __init__(self, name=None):
super(NoteIndexList, self).__init__()
- self.name = name
- self.info = {}
- self._index = 0
+ self._set_default_attrs()
+ self.__setstate__({'name': name})
def __str__(self):
return str(self.__unicode__())
def __repr__(self):
return self.__str__()
+ def _set_default_attrs(self):
+ self._default_attrs = {
+ 'info': {},
+ 'name': None,
+ '_index': 0,
+ }
+
+ def __getstate__(self):
+ return self.__dict__.copy()
+
+ def __setstate__(self, state):
+ self._set_default_attrs()
+ if state == True:
+ return
+ self.__dict__.update(self._default_attrs)
+ try:
+ self.__dict__.update(state)
+ except TypeError, e:
+ print state, type(state), e
+ if self.info in [None, {}]:
+ self.info = {}
+
def _setup_item(self, item):
"""Perform any required initialization before returning an item.
"""
return self._index
return super(NoteIndexList, self).index(value, *args, **kwargs)
- def current(self):
+ def current(self, load=True):
if len(self) == 0:
return None
item = self[self._index]
- self._setup_item(item)
+ if load == True:
+ self._setup_item(item)
return item
def jump(self, index):
Updates :attr:`_index` during the iteration so
:func:`~hooke.plugin.curve.current_curve_callback` works as
expected in :class:`~hooke.command.Command`\s called from
- :class:`~hooke.plugin.playlist.ApplyCommandStack`. After the
+ :class:`~hooke.plugin.playlist.ApplyCommand`. After the
iteration completes, :attr:`_index` is restored to its
original value.
"""
index = self._index
items = self
if reverse == True:
- items = reversed(enumerate(self))
+ items = reverse_enumerate(self)
else:
items = enumerate(self)
for i,item in items:
yield item
self._index = index
- def filter(self, keeper_fn=lambda item:True, *args, **kwargs):
+ def filter(self, keeper_fn=lambda item:True, load_curves=True,
+ *args, **kwargs):
c = copy.deepcopy(self)
- for item in c.items(reverse=True):
+ if load_curves == True:
+ items = c.items(reverse=True)
+ else:
+ items = reversed(c)
+ for item in items:
if keeper_fn(item, *args, **kwargs) != True:
c.remove(item)
try: # attempt to maintain the same current item
class Playlist (NoteIndexList):
- """A :class:`NoteIndexList` of :class:`hooke.curve.Curve`\s.
+ """A :class:`NoteIndexList` of :class:`hooke.Curve`\s.
Keeps a list of :attr:`drivers` for loading curves.
"""
def __init__(self, drivers, name=None):
super(Playlist, self).__init__(name=name)
self.drivers = drivers
- self._loaded = [] # List of loaded curves, see :meth:`._setup_item`.
- self._max_loaded = 100 # curves to hold in memory simultaneously.
+
+ def _set_default_attrs(self):
+ super(Playlist, self)._set_default_attrs()
+ self._default_attrs['drivers'] = []
+ # List of loaded curves, see :meth:`._setup_item`.
+ self._default_attrs['_loaded'] = []
+ self._default_attrs['_max_loaded'] = 100 # curves to hold in memory simultaneously.
+
+ def __setstate__(self, state):
+ super(Playlist, self).__setstate__(state)
+ if self.drivers in [None, {}]:
+ self.drivers = []
+ if self._loaded in [None, {}]:
+ self._loaded = []
+
+ def append_curve(self, curve):
+ self.append(curve)
def append_curve_by_path(self, path, info=None, identify=True, hooke=None):
path = os.path.normpath(path)
- c = curve.Curve(path, info=info)
+ c = Curve(path, info=info)
c.set_hooke(hooke)
if identify == True:
c.identify(self.drivers)
oldest = self._loaded.pop(0)
oldest.unload()
+ def unload(self, curve):
+ "Inverse of .`_setup_item`."
+ curve.unload()
+ try:
+ self._loaded.remove(curve)
+ except ValueError:
+ pass
+
+
+def playlist_path(path):
+ """Normalize playlist path extensions.
+
+ Examples
+ --------
+ >>> print playlist_path('playlist')
+ playlist.hkp
+ >>> print playlist_path('playlist.hkp')
+ playlist.hkp
+ >>> print playlist_path(None)
+ None
+ """
+ if path == None:
+ return None
+ if not path.endswith('.hkp'):
+ path += '.hkp'
+ return path
+
class FilePlaylist (Playlist):
"""A file-backed :class:`Playlist`.
+
+ Examples
+ --------
+
+ >>> p = FilePlaylist(drivers=['Driver A', 'Driver B'])
+ >>> p.append(Curve('dummy/path/A'))
+ >>> p.append(Curve('dummy/path/B'))
+
+ The data-type is pickleable, to ensure we can move it between
+ processes with :class:`multiprocessing.Queue`\s.
+
+ >>> import pickle
+ >>> s = pickle.dumps(p)
+ >>> z = pickle.loads(s)
+ >>> for curve in z:
+ ... print curve
+ <Curve A>
+ <Curve B>
+ >>> print z.drivers
+ ['Driver A', 'Driver B']
+
+ The data-type is also YAMLable (see :mod:`hooke.util.yaml`).
+
+ >>> s = yaml.dump(p)
+ >>> z = yaml.load(s)
+ >>> for curve in z:
+ ... print curve
+ <Curve A>
+ <Curve B>
+ >>> print z.drivers
+ ['Driver A', 'Driver B']
"""
- version = '0.1'
+ version = '0.2'
def __init__(self, drivers, name=None, path=None):
super(FilePlaylist, self).__init__(drivers, name)
- self.path = None
+ self.path = self._base_path = None
self.set_path(path)
- self._digest = None
- self._ignored_keys = [
- 'experiment', # class instance, not very exciting.
- ]
+ self.relative_curve_paths = True
+ self._relative_curve_paths = False
+
+ def _set_default_attrs(self):
+ super(FilePlaylist, self)._set_default_attrs()
+ self._default_attrs['relative_curve_paths'] = True
+ self._default_attrs['_relative_curve_paths'] = False
+ self._default_attrs['_digest'] = None
+
+ def __getstate__(self):
+ state = super(FilePlaylist, self).__getstate__()
+ assert 'version' not in state, state
+ state['version'] = self.version
+ return state
+
+ def __setstate__(self, state):
+ if 'version' in state:
+ version = state.pop('version')
+ assert version == FilePlaylist.version, (
+ 'invalid version %s (%s) != %s (%s)'
+ % (version, type(version),
+ FilePlaylist.version, type(FilePlaylist.version)))
+ super(FilePlaylist, self).__setstate__(state)
def set_path(self, path):
- if path != None:
- if not path.endswith('.hkp'):
- path += '.hkp'
+ orig_base_path = getattr(self, '_base_path', None)
+ if path == None:
+ if self._base_path == None:
+ self._base_path = os.getcwd()
+ else:
+ path = playlist_path(path)
self.path = path
+ self._base_path = os.path.dirname(os.path.abspath(
+ os.path.expanduser(self.path)))
if self.name == None:
self.name = os.path.basename(path)
+ if self._base_path != orig_base_path:
+ self.update_curve_paths()
+
+ def update_curve_paths(self):
+ for curve in self:
+ curve.set_path(self._curve_path(curve.path))
+
+ def _curve_path(self, path):
+ if self._base_path == None:
+ self._base_path = os.getcwd()
+ path = os.path.join(self._base_path, path)
+ if self._relative_curve_paths == True:
+ path = os.path.relpath(path, self._base_path)
+ return path
+
+ def append_curve(self, curve):
+ curve.set_path(self._curve_path(curve.path))
+ super(FilePlaylist, self).append_curve(curve)
def append_curve_by_path(self, path, *args, **kwargs):
- if self.path != None:
- path = os.path.join(os.path.dirname(self.path), path)
+ path = self._curve_path(path)
super(FilePlaylist, self).append_curve_by_path(path, *args, **kwargs)
def is_saved(self):
>>> p = FilePlaylist(drivers=[],
... path=os.path.join(root_path, 'to','playlist'))
>>> p.info['note'] = 'An example playlist'
- >>> c = curve.Curve(os.path.join(root_path, 'to', 'curve', 'one'))
+ >>> c = Curve(os.path.join(root_path, 'to', 'curve', 'one'))
>>> c.info['note'] = 'The first curve'
- >>> p.append(c)
- >>> c = curve.Curve(os.path.join(root_path, 'to', 'curve', 'two'))
+ >>> p.append_curve(c)
+ >>> c = Curve(os.path.join(root_path, 'to', 'curve', 'two'))
>>> c.info['note'] = 'The second curve'
- >>> p.append(c)
+ >>> p.append_curve(c)
>>> p.digest()
- '\\\x14\x87\x88*q\xf8\xaa\xa7\x84f\x82\xa1S>\xfd3+\xd0o'
+ 'f\xe26i\xb98i\x1f\xb61J7:\xf2\x8e\x1d\xde\xc3}g'
"""
string = self.flatten()
return hashlib.sha1(string).digest()
- def _clean_key(self, key):
- """Replace spaces in keys with \\u00B7 (middle dot).
-
- This character is deemed unlikely to occur in keys to our
- playlist and curve info dictionaries, while many keys have
- spaces in them.
-
- \\u00B7 is allowed in XML 1.0 as of the 5th edition. See
- the `4th edition errata`_ for details.
-
- .. _4th edition errata:
- http://www.w3.org/XML/xml-V10-4e-errata#E09
- """
- return key.replace(' ', u'\u00B7')
-
- def _restore_key(self, key):
- """Restore keys encoded with :meth:`_clean_key`.
- """
- return key.replace(u'\u00B7', ' ')
-
- def flatten(self, absolute_paths=False):
+ def flatten(self):
"""Create a string representation of the playlist.
- A playlist is an XML document with the following syntax::
+ A playlist is a YAML document with the following minimal syntax::
- <?xml version="1.0" encoding="utf-8"?>
- <playlist attribute="value">
- <curve path="/my/file/path/"/ attribute="value" ...>
- <curve path="...">
- </playlist>
+ !!python/object/new:hooke.playlist.FilePlaylist
+ state:
+ version: '0.2'
+ listitems:
+ - !!python/object:hooke.curve.Curve
+ path: /path/to/curve/one
+ - !!python/object:hooke.curve.Curve
+ path: /path/to/curve/two
Relative paths are interpreted relative to the location of the
playlist file.
Examples
--------
+ >>> from .engine import CommandMessage
+
>>> root_path = os.path.sep + 'path'
>>> p = FilePlaylist(drivers=[],
... path=os.path.join(root_path, 'to','playlist'))
>>> p.info['note'] = 'An example playlist'
- >>> c = curve.Curve(os.path.join(root_path, 'to', 'curve', 'one'))
+ >>> c = Curve(os.path.join(root_path, 'to', 'curve', 'one'))
>>> c.info['note'] = 'The first curve'
- >>> p.append(c)
- >>> c = curve.Curve(os.path.join(root_path, 'to', 'curve', 'two'))
+ >>> p.append_curve(c)
+ >>> c = Curve(os.path.join(root_path, 'to', 'curve', 'two'))
>>> c.info['attr with spaces'] = 'The second curve\\nwith endlines'
- >>> p.append(c)
- >>> def _print(string):
- ... escaped_string = unicode(string, 'utf-8').encode('unicode escape')
- ... print escaped_string.replace('\\\\n', '\\n').replace('\\\\t', '\\t'),
- >>> _print(p.flatten()) # doctest: +NORMALIZE_WHITESPACE +REPORT_UDIFF
- <?xml version="1.0" encoding="utf-8"?>
- <playlist index="0" note="An example playlist" version="0.1">
- <curve note="The first curve" path="curve/one"/>
- <curve attr\\xb7with\\xb7spaces="The second curve
with endlines" path="curve/two"/>
- </playlist>
- >>> _print(p.flatten(absolute_paths=True)) # doctest: +NORMALIZE_WHITESPACE +REPORT_UDIFF
- <?xml version="1.0" encoding="utf-8"?>
- <playlist index="0" note="An example playlist" version="0.1">
- <curve note="The first curve" path="/path/to/curve/one"/>
- <curve attr\\xb7with\\xb7spaces="The second curve
with endlines" path="/path/to/curve/two"/>
- </playlist>
- """
- implementation = xml.dom.minidom.getDOMImplementation()
- # create the document DOM object and the root element
- doc = implementation.createDocument(None, 'playlist', None)
- root = doc.documentElement
- root.setAttribute('version', self.version) # store playlist version
- root.setAttribute('index', str(self._index))
- for key,value in self.info.items(): # save info variables
- if (key in self._ignored_keys
- or not isinstance(value, types.StringTypes)):
- continue
- root.setAttribute(self._clean_key(key), str(value))
- for curve in self: # save curves and their attributes
- curve_element = doc.createElement('curve')
- root.appendChild(curve_element)
- path = os.path.abspath(os.path.expanduser(curve.path))
- if absolute_paths == False:
- path = os.path.relpath(
- path,
- os.path.dirname(
- os.path.abspath(
- os.path.expanduser(self.path))))
- curve_element.setAttribute('path', path)
- for key,value in curve.info.items():
- if (key in self._ignored_keys
- or not isinstance(value, types.StringTypes)):
- continue
- curve_element.setAttribute(self._clean_key(key), str(value))
- string = doc.toprettyxml(encoding='utf-8')
- root.unlink() # break circular references for garbage collection
- return string
-
- def _from_xml_doc(self, doc, identify=True):
- """Load a playlist from an :class:`xml.dom.minidom.Document`
- instance.
+ >>> c.command_stack.extend([
+ ... CommandMessage('command A', {'arg 0':0, 'arg 1':'X'}),
+ ... CommandMessage('command B', {'arg 0':1, 'curve':c}),
+ ... ])
+ >>> p.append_curve(c)
+ >>> print p.flatten() # doctest: +REPORT_UDIFF
+ # Hooke playlist version 0.2
+ !!python/object/new:hooke.playlist.FilePlaylist
+ listitems:
+ - !!python/object:hooke.curve.Curve
+ info: {note: The first curve}
+ name: one
+ path: curve/one
+ - &id001 !!python/object:hooke.curve.Curve
+ command_stack: !!python/object/new:hooke.command_stack.CommandStack
+ listitems:
+ - !!python/object:hooke.engine.CommandMessage
+ arguments: {arg 0: 0, arg 1: X}
+ command: command A
+ - !!python/object:hooke.engine.CommandMessage
+ arguments:
+ arg 0: 1
+ curve: *id001
+ command: command B
+ info: {attr with spaces: 'The second curve
+ <BLANKLINE>
+ with endlines'}
+ name: two
+ path: curve/two
+ state:
+ _base_path: /path/to
+ info: {note: An example playlist}
+ name: playlist.hkp
+ path: /path/to/playlist.hkp
+ version: '0.2'
+ <BLANKLINE>
+ >>> p.relative_curve_paths = False
+ >>> print p.flatten() # doctest: +REPORT_UDIFF
+ # Hooke playlist version 0.2
+ !!python/object/new:hooke.playlist.FilePlaylist
+ listitems:
+ - !!python/object:hooke.curve.Curve
+ info: {note: The first curve}
+ name: one
+ path: /path/to/curve/one
+ - &id001 !!python/object:hooke.curve.Curve
+ command_stack: !!python/object/new:hooke.command_stack.CommandStack
+ listitems:
+ - !!python/object:hooke.engine.CommandMessage
+ arguments: {arg 0: 0, arg 1: X}
+ command: command A
+ - !!python/object:hooke.engine.CommandMessage
+ arguments:
+ arg 0: 1
+ curve: *id001
+ command: command B
+ info: {attr with spaces: 'The second curve
+ <BLANKLINE>
+ with endlines'}
+ name: two
+ path: /path/to/curve/two
+ state:
+ _base_path: /path/to
+ info: {note: An example playlist}
+ name: playlist.hkp
+ path: /path/to/playlist.hkp
+ relative_curve_paths: false
+ version: '0.2'
+ <BLANKLINE>
"""
- root = doc.documentElement
- for attribute,value in root.attributes.items():
- attribute = self._restore_key(attribute)
- if attribute == 'version':
- assert value == self.version, \
- 'Cannot read v%s playlist with a v%s reader' \
- % (value, self.version)
- elif attribute == 'index':
- self._index = int(value)
- else:
- self.info[attribute] = value
- for curve_element in doc.getElementsByTagName('curve'):
- path = curve_element.getAttribute('path')
- info = dict([(self._restore_key(key), value)
- for key,value in curve_element.attributes.items()])
- info.pop('path')
- self.append_curve_by_path(path, info, identify=identify)
- self.jump(self._index) # ensure valid index
-
- def from_string(self, string, identify=True):
- u"""Load a playlist from a string.
-
- Examples
- --------
+ rcp = self._relative_curve_paths
+ self._relative_curve_paths = self.relative_curve_paths
+ self.update_curve_paths()
+ self._relative_curve_paths = rcp
- >>> string = '''<?xml version="1.0" encoding="utf-8"?>
- ... <playlist index="1" note="An example playlist" version="0.1">
- ... <curve note="The first curve" path="../curve/one"/>
- ... <curve attr\xb7with\xb7spaces="The second curve
with endlines" path="../curve/two"/>
- ... </playlist>
- ... '''
- >>> p = FilePlaylist(drivers=[],
- ... path=os.path.join('path', 'to', 'my', 'playlist'))
- >>> p.from_string(string, identify=False)
- >>> p._index
- 1
- >>> p.info
- {u'note': u'An example playlist'}
- >>> for curve in p:
- ... print curve.path
- path/to/curve/one
- path/to/curve/two
- >>> p[-1].info['attr with spaces']
- u'The second curve\\nwith endlines'
- """
- doc = xml.dom.minidom.parseString(string)
- self._from_xml_doc(doc, identify=identify)
-
- def load(self, path=None, identify=True, hooke=None):
- """Load a playlist from a file.
- """
- self.set_path(path)
- doc = xml.dom.minidom.parse(self.path)
- self._from_xml_doc(doc, identify=identify)
- self._digest = self.digest()
- for curve in self:
- curve.set_hooke(hooke)
+ yaml_string = yaml.dump(self, allow_unicode=True)
+ self.update_curve_paths()
+ return ('# Hooke playlist version %s\n' % self.version) + yaml_string
def save(self, path=None, makedirs=True):
- """Saves the playlist in a XML file.
+ """Saves the playlist to a YAML file.
"""
self.set_path(path)
dirname = os.path.dirname(self.path) or '.'
with open(self.path, 'w') as f:
f.write(self.flatten())
self._digest = self.digest()
+
+
+def from_string(string):
+ u"""Load a playlist from a string.
+
+ Examples
+ --------
+
+ Minimal example.
+
+ >>> string = '''# Hooke playlist version 0.2
+ ... !!python/object/new:hooke.playlist.FilePlaylist
+ ... state:
+ ... version: '0.2'
+ ... listitems:
+ ... - !!python/object:hooke.curve.Curve
+ ... path: curve/one
+ ... - !!python/object:hooke.curve.Curve
+ ... path: curve/two
+ ... '''
+ >>> p = from_string(string)
+ >>> p.set_path('/path/to/playlist')
+ >>> for curve in p:
+ ... print curve.name, curve.path
+ one /path/to/curve/one
+ two /path/to/curve/two
+
+ More complicated example.
+
+ >>> string = '''# Hooke playlist version 0.2
+ ... !!python/object/new:hooke.playlist.FilePlaylist
+ ... listitems:
+ ... - !!python/object:hooke.curve.Curve
+ ... info: {note: The first curve}
+ ... name: one
+ ... path: /path/to/curve/one
+ ... - &id001 !!python/object:hooke.curve.Curve
+ ... command_stack: !!python/object/new:hooke.command_stack.CommandStack
+ ... listitems:
+ ... - !!python/object:hooke.engine.CommandMessage
+ ... arguments: {arg 0: 0, arg 1: X}
+ ... command: command A
+ ... - !!python/object:hooke.engine.CommandMessage
+ ... arguments:
+ ... arg 0: 1
+ ... curve: *id001
+ ... command: command B
+ ... info: {attr with spaces: 'The second curve
+ ...
+ ... with endlines'}
+ ... name: two
+ ... path: /path/to/curve/two
+ ... state:
+ ... _base_path: /path/to
+ ... _index: 1
+ ... info: {note: An example playlist}
+ ... name: playlist.hkp
+ ... path: /path/to/playlist.hkp
+ ... version: '0.2'
+ ... '''
+ >>> p = from_string(string)
+ >>> p.set_path('/path/to/playlist')
+ >>> p._index
+ 1
+ >>> p.info
+ {'note': 'An example playlist'}
+ >>> for curve in p:
+ ... print curve.name, curve.path
+ one /path/to/curve/one
+ two /path/to/curve/two
+ >>> p[-1].info['attr with spaces']
+ 'The second curve\\nwith endlines'
+ >>> type(p[-1].command_stack)
+ <class 'hooke.command_stack.CommandStack'>
+ >>> p[0].command_stack
+ []
+ >>> type(p[0].command_stack)
+ <class 'hooke.command_stack.CommandStack'>
+ >>> p[-1].command_stack # doctest: +NORMALIZE_WHITESPACE
+ [<CommandMessage command A {arg 0: 0, arg 1: X}>,
+ <CommandMessage command B {arg 0: 1, curve: <Curve two>}>]
+ >>> type(p[1].command_stack)
+ <class 'hooke.command_stack.CommandStack'>
+ >>> c2 = p[-1]
+ >>> c2.command_stack[-1].arguments['curve'] == c2
+ True
+ """
+ return yaml.load(string)
+
+def load(path=None, drivers=None, identify=True, hooke=None):
+ """Load a playlist from a file.
+ """
+ path = playlist_path(path)
+ with open(path, 'r') as f:
+ text = f.read()
+ playlist = from_string(text)
+ playlist.set_path(path)
+ playlist._digest = playlist.digest()
+ if drivers != None:
+ playlist.drivers = drivers
+ playlist.set_path(path)
+ for curve in playlist:
+ curve.set_hooke(hooke)
+ if identify == True:
+ curve.identify(playlist.drivers)
+ return playlist
+
+
+class Playlists (NoteIndexList):
+ """A :class:`NoteIndexList` of :class:`FilePlaylist`\s.
+ """
+ pass
projects / hooke.git / blobdiff