X-Git-Url: http://git.tremily.us/?p=hooke.git;a=blobdiff_plain;f=hooke%2Fplaylist.py;h=3380bfcacfc4ca24a02f4ee49e11c89370fa9cd0;hp=4cc897aa8272d23dfaccfe2847c47a48257d99b4;hb=07d84098df5efe5db97461a0568c813f634ea117;hpb=0a4125c1730a5ae595ce13650178cd15e4571e80
diff --git a/hooke/playlist.py b/hooke/playlist.py
index 4cc897a..3380bfc 100644
--- a/hooke/playlist.py
+++ b/hooke/playlist.py
@@ -2,15 +2,15 @@
#
# This file is part of Hooke.
#
-# Hooke is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation, either
-# version 3 of the License, or (at your option) any later version.
+# Hooke is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
#
-# Hooke 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 Lesser General Public License for more details.
+# Hooke 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 Lesser General
+# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with Hooke. If not, see
@@ -23,10 +23,15 @@
import copy
import hashlib
+import os
import os.path
-import xml.dom.minidom
+import types
+
+import yaml
+from yaml.representer import RepresenterError
from . import curve as curve
+from .util.itertools import reverse_enumerate
class NoteIndexList (list):
@@ -41,14 +46,87 @@ class NoteIndexList (list):
self.name = name
self.info = {}
self._index = 0
+ self._set_ignored_attrs()
def __str__(self):
- return '<%s %s>' % (self.__class__.__name__, self.name)
+ return str(self.__unicode__())
+
+ def __unicode__(self):
+ return u'<%s %s>' % (self.__class__.__name__, self.name)
+
+ def __repr__(self):
+ return self.__str__()
+
+ def _set_ignored_attrs(self):
+ self._ignored_attrs = ['_ignored_attrs', '_default_attrs']
+ self._default_attrs = {
+ 'info': {},
+ }
+
+ def __getstate__(self):
+ state = dict(self.__dict__)
+ for key in self._ignored_attrs:
+ if key in state:
+ del(state[key])
+ for key,value in self._default_attrs.items():
+ if key in state and state[key] == value:
+ del(state[key])
+ assert 'items' not in state
+ state['items'] = []
+ self._assert_clean_state(self, state)
+ for item in self: # save curves and their attributes
+ item_state = self._item_getstate(item)
+ self._assert_clean_state(item, item_state)
+ state['items'].append(item_state)
+ return state
+
+ def __setstate__(self, state):
+ self._set_ignored_attrs()
+ for key,value in self._default_attrs.items():
+ setattr(self, key, value)
+ for key,value in state.items():
+ if key == 'items':
+ continue
+ setattr(self, key, value)
+ for item_state in state['items']:
+ self.append(self._item_setstate(item_state))
+
+ def _item_getstate(self, item):
+ return item
+
+ def _item_setstate(self, state):
+ return state
+
+ def _assert_clean_state(self, owner, state):
+ for k,v in state.items():
+ if k == 'drivers': # HACK. Need better driver serialization.
+ continue
+ try:
+ yaml.dump((k,v))
+ except RepresenterError, e:
+ raise NotImplementedError(
+ 'cannot convert %s.%s = %s (%s) to YAML\n%s'
+ % (owner.__class__.__name__, k, v, type(v), e))
+
+ def _setup_item(self, item):
+ """Perform any required initialization before returning an item.
+ """
+ pass
+
+ def index(self, value=None, *args, **kwargs):
+ """Extend `list.index`, returning the current index if `value`
+ is `None`.
+ """
+ if value == None:
+ return self._index
+ return super(NoteIndexList, self).index(value, *args, **kwargs)
def current(self):
if len(self) == 0:
return None
- return self[self._index]
+ item = self[self._index]
+ self._setup_item(item)
+ return item
def jump(self, index):
if len(self) == 0:
@@ -62,10 +140,40 @@ class NoteIndexList (list):
def previous(self):
self.jump(self._index - 1)
- def filter(self, keeper_fn=lambda item:True):
+ def items(self, reverse=False):
+ """Iterate through `self` calling `_setup_item` on each item
+ before yielding.
+
+ Notes
+ -----
+ 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.ApplyCommand`. After the
+ iteration completes, :attr:`_index` is restored to its
+ original value.
+ """
+ index = self._index
+ items = self
+ if reverse == True:
+ items = reverse_enumerate(self)
+ else:
+ items = enumerate(self)
+ for i,item in items:
+ self._index = i
+ self._setup_item(item)
+ yield item
+ self._index = index
+
+ def filter(self, keeper_fn=lambda item:True, load_curves=True,
+ *args, **kwargs):
c = copy.deepcopy(self)
- for item in reversed(c):
- if keeper_fn(item) != 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
c._index = c.index(self.current())
@@ -73,6 +181,7 @@ class NoteIndexList (list):
c._index = 0
return c
+
class Playlist (NoteIndexList):
"""A :class:`NoteIndexList` of :class:`hooke.curve.Curve`\s.
@@ -81,33 +190,128 @@ class Playlist (NoteIndexList):
def __init__(self, drivers, name=None):
super(Playlist, self).__init__(name=name)
self.drivers = drivers
-
- def append_curve_by_path(self, path, info=None, identify=True):
- if self.path != None:
- path = os.path.join(self.path, path)
+ self._max_loaded = 100 # curves to hold in memory simultaneously.
+
+ def _set_ignored_attrs(self):
+ super(Playlist, self)._set_ignored_attrs()
+ self._ignored_attrs.extend([
+ '_item_ignored_attrs', '_item_default_attrs',
+ '_loaded'])
+ self._item_ignored_attrs = ['data']
+ self._item_default_attrs = {
+ 'command_stack': [],
+ 'driver': None,
+ 'info': {},
+ 'name': None,
+ }
+ self._loaded = [] # List of loaded curves, see :meth:`._setup_item`.
+
+ def _item_getstate(self, item):
+ assert isinstance(item, curve.Curve), type(item)
+ state = item.__getstate__()
+ for key in self._item_ignored_attrs:
+ if key in state:
+ del(state[key])
+ for key,value in self._item_default_attrs.items():
+ if key in state and state[key] == value:
+ del(state[key])
+ return state
+
+ def _item_setstate(self, state):
+ for key,value in self._item_default_attrs.items():
+ if key not in state:
+ state[key] = value
+ item = curve.Curve(path=None)
+ item.__setstate__(state)
+ return item
+
+ 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.set_hooke(hooke)
if identify == True:
c.identify(self.drivers)
self.append(c)
return c
+ def _setup_item(self, curve):
+ if curve != None and curve not in self._loaded:
+ if curve not in self:
+ self.append(curve)
+ if curve.driver == None:
+ c.identify(self.drivers)
+ if curve.data == None:
+ curve.load()
+ self._loaded.append(curve)
+ if len(self._loaded) > self._max_loaded:
+ oldest = self._loaded.pop(0)
+ oldest.unload()
+
+
class FilePlaylist (Playlist):
- version = '0.1'
+ """A file-backed :class:`Playlist`.
+ """
+ version = '0.2'
def __init__(self, drivers, name=None, path=None):
super(FilePlaylist, self).__init__(drivers, name)
+ self.path = self._base_path = None
self.set_path(path)
+ self._relative_curve_paths = True
+
+ def _set_ignored_attrs(self):
+ super(FilePlaylist, self)._set_ignored_attrs()
+ self._ignored_attrs.append('_digest')
self._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):
+ assert('version') in state, 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 _item_getstate(self, item):
+ state = super(FilePlaylist, self)._item_getstate(item)
+ if state.get('path', None) != None:
+ path = os.path.abspath(os.path.expanduser(state['path']))
+ if self._relative_curve_paths == True:
+ path = os.path.relpath(path, self._base_path)
+ state['path'] = path
+ return state
+
+ def _item_setstate(self, state):
+ item = super(FilePlaylist, self)._item_setstate(state)
+ if 'path' in state:
+ item.set_path(os.path.join(self._base_path, state['path']))
+ return item
+
def set_path(self, path):
- if path != None:
+ if path == None:
+ if self._base_path == None:
+ self._base_path = os.getcwd()
+ else:
if not path.endswith('.hkp'):
path += '.hkp'
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)
+ def append_curve_by_path(self, path, *args, **kwargs):
+ if self._base_path != None:
+ path = os.path.join(self._base_path, path)
+ super(FilePlaylist, self).append_curve_by_path(path, *args, **kwargs)
+
def is_saved(self):
return self.digest() == self._digest
@@ -129,28 +333,29 @@ class FilePlaylist (Playlist):
>>> c.info['note'] = 'The second curve'
>>> p.append(c)
>>> p.digest()
- "\xa1\x99\x8a\x99\xed\xad\x13'\xa7w\x12\x00\x07Z\xb3\xd0zN\xa2\xe1"
+ '\xa1\x1ax\xb1|\x84uA\xe4\x1d\xbf`\x004|\x82\xc2\xdd\xc1\x9e'
"""
string = self.flatten()
return hashlib.sha1(string).digest()
- 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::
-
-
-
-
-
+ version: '0.2'
+ items:
+ - path: picoforce.000
+ - path: picoforce.001
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'))
@@ -159,106 +364,184 @@ class FilePlaylist (Playlist):
>>> c.info['note'] = 'The first curve'
>>> p.append(c)
>>> c = curve.Curve(os.path.join(root_path, 'to', 'curve', 'two'))
- >>> c.info['note'] = 'The second curve'
+ >>> c.info['attr with spaces'] = 'The second curve\\nwith endlines'
+ >>> c.command_stack.extend([
+ ... CommandMessage('command A', {'arg 0':0, 'arg 1':'X'}),
+ ... CommandMessage('command B', {'arg 0':1, 'arg 1':'Y'}),
+ ... ])
>>> p.append(c)
- >>> print p.flatten() # doctest: +NORMALIZE_WHITESPACE +REPORT_UDIFF
-
-
-
-
-
+ >>> print p.flatten() # doctest: +REPORT_UDIFF
+ # Hooke playlist version 0.2
+ _base_path: /path/to
+ _index: 0
+ _max_loaded: 100
+ _relative_curve_paths: true
+ drivers: []
+ info: {note: An example playlist}
+ items:
+ - info: {note: The first curve}
+ name: one
+ path: curve/one
+ - 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, arg 1: Y}
+ command: command B
+ info: {attr with spaces: 'The second curve
- >>> print p.flatten(absolute_paths=True) # doctest: +NORMALIZE_WHITESPACE +REPORT_UDIFF
-
-
-
-
-
+ with endlines'}
+ name: two
+ path: curve/two
+ name: playlist.hkp
+ path: /path/to/playlist.hkp
+ version: '0.2'
+
+ >>> p._relative_curve_paths = False
+ >>> print p.flatten() # doctest: +REPORT_UDIFF
+ # Hooke playlist version 0.2
+ _base_path: /path/to
+ _index: 0
+ _max_loaded: 100
+ _relative_curve_paths: false
+ drivers: []
+ info: {note: An example playlist}
+ items:
+ - info: {note: The first curve}
+ name: one
+ path: /path/to/curve/one
+ - 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, arg 1: Y}
+ command: command B
+ info: {attr with spaces: 'The second curve
+
+ with endlines'}
+ name: two
+ path: /path/to/curve/two
+ name: playlist.hkp
+ path: /path/to/playlist.hkp
+ version: '0.2'
"""
- 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
- root.setAttribute(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.abspath(os.path.expanduser(self.path)))
- curve_element.setAttribute('path', path)
- for key,value in curve.info.items():
- curve_element.setAttribute(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):
- """Load a playlist from an :class:`xml.dom.minidom.Document`
- instance.
- """
- root = doc.documentElement
- for attribute,value in root.attributes.items():
- 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(curve_element.attributes.items())
- info.pop('path')
- self.append_curve_by_path(path, info, identify=False)
- self.jump(self._index) # ensure valid index
+ yaml_string = yaml.dump(self.__getstate__(), allow_unicode=True)
+ return ('# Hooke playlist version %s\n' % self.version) + yaml_string
def from_string(self, string):
- """Load a playlist from a string.
+ u"""Load a playlist from a string.
Examples
--------
- >>> string = '''
- ...
- ...
- ...
- ...
+ Minimal example.
+
+ >>> string = '''# Hooke playlist version 0.2
+ ... version: '0.2'
+ ... items:
+ ... - path: picoforce.000
+ ... - path: picoforce.001
+ ... '''
+ >>> p = FilePlaylist(drivers=[],
+ ... path=os.path.join('/path', 'to', 'my', 'playlist'))
+ >>> p.from_string(string)
+ >>> for curve in p:
+ ... print curve.path
+ /path/to/my/picoforce.000
+ /path/to/my/picoforce.001
+
+ More complicated example.
+
+ >>> string = '''# Hooke playlist version 0.2
+ ... _base_path: /path/to
+ ... _digest: null
+ ... _index: 1
+ ... _max_loaded: 100
+ ... _relative_curve_paths: true
+ ... info: {note: An example playlist}
+ ... items:
+ ... - info: {note: The first curve}
+ ... path: curve/one
+ ... - 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, arg 1: Y}
+ ... command: command B
+ ... info: {attr with spaces: 'The second curve
+ ...
+ ... with endlines'}
+ ... name: two
+ ... path: curve/two
+ ... name: playlist.hkp
+ ... path: /path/to/playlist.hkp
+ ... version: '0.2'
... '''
>>> p = FilePlaylist(drivers=[],
- ... path=os.path.join('path', 'to','playlist'))
+ ... path=os.path.join('path', 'to', 'my', 'playlist'))
>>> p.from_string(string)
>>> p._index
1
>>> p.info
- {u'note': u'An example playlist'}
+ {'note': 'An example playlist'}
>>> for curve in p:
- ... print curve.path
- path/to/curve/one
- path/to/curve/two
+ ... 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)
+
+ >>> p[-1].command_stack # doctest: +NORMALIZE_WHITESPACE
+ [,
+ ]
"""
- doc = xml.dom.minidom.parseString(string)
- self._from_xml_doc(doc)
+ state = yaml.load(string)
+ self.__setstate__(state)
- def load(self, path=None):
+ def save(self, path=None, makedirs=True):
+ """Saves the playlist to a YAML file.
+ """
+ self.set_path(path)
+ dirname = os.path.dirname(self.path) or '.'
+ if makedirs == True and not os.path.isdir(dirname):
+ os.makedirs(dirname)
+ with open(self.path, 'w') as f:
+ f.write(self.flatten())
+ self._digest = self.digest()
+
+ 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)
+ with open(self.path, 'r') as f:
+ text = f.read()
+ self.from_string(text)
self._digest = self.digest()
+ for curve in self:
+ curve.set_hooke(hooke)
+ if identify == True:
+ curve.identify(self.drivers)
- def save(self, path=None):
- """Saves the playlist in a XML file.
- """
- self.set_path(path)
- f = file(self.path, 'w')
- f.write(self.flatten())
- f.close()
+
+class Playlists (NoteIndexList):
+ """A :class:`NoteIndexList` of :class:`FilePlaylist`\s.
+ """
+ def __init__(self, *arg, **kwargs):
+ super(Playlists, self).__init__(*arg, **kwargs)
+
+ def _item_getstate(self, item):
+ assert isinstance(item, FilePlaylist), type(item)
+ return item.__getstate__()
+
+ def _item_setstate(self, state):
+ item = FilePlaylist(drivers=[])
+ item.__setstate__(state)
+ return item