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Documentation.
[python-bulletml.git]
/
bulletml
/
parser.py
diff --git
a/bulletml/parser.py
b/bulletml/parser.py
index
b39437a
..
62f00d4
100644
(file)
--- a/
bulletml/parser.py
+++ b/
bulletml/parser.py
@@
-1,6
+1,10
@@
"""BulletML parser.
"""BulletML parser.
-http://www.asahi-net.or.jp/~cs8k-cyu/bulletml/index_e.html
+This is based on the format described at
+http://www.asahi-net.or.jp/~cs8k-cyu/bulletml/bulletml_ref_e.html.
+
+Unless you are adding support for new tags, the only class you should
+care about in here is BulletML.
"""
from __future__ import division
"""
from __future__ import division
@@
-31,7
+35,7
@@
def realtag(element):
class ParamList(object):
"""List of parameter definitions."""
class ParamList(object):
"""List of parameter definitions."""
- def __init__(self, params=
[]
):
+ def __init__(self, params=
()
):
self.params = list(params)
@classmethod
self.params = list(params)
@classmethod
@@
-312,7
+316,13
@@
class BulletRef(object):
type(self).__name__, self.params, self.bullet)
class ActionDef(object):
type(self).__name__, self.params, self.bullet)
class ActionDef(object):
- """Action definition."""
+ """Action definition.
+
+ To support parsing new actions, add tags to
+ ActionDef.CONSTRUCTORS. It maps tag names to classes with a
+ FromElement classmethod, which take the BulletML instance and
+ ElementTree element as arguments.
+ """
# This is self-referential, so it's filled in later.
CONSTRUCTORS = dict()
# This is self-referential, so it's filled in later.
CONSTRUCTORS = dict()
@@
-435,6
+445,12
@@
class BulletML(object):
A BulletML document is a collection of bullets, actions, and
firings, as well as a base game type.
A BulletML document is a collection of bullets, actions, and
firings, as well as a base game type.
+
+ You can add tags to the BulletML.CONSTRUCTORS dictionary to extend
+ its parsing. It maps tag names to classes with a FromElement
+ classmethod, which take the BulletML instance and ElementTree
+ element as arguments.
+
"""
CONSTRUCTORS = dict(
"""
CONSTRUCTORS = dict(
@@
-443,22
+459,26
@@
class BulletML(object):
fire=FireDef,
)
fire=FireDef,
)
- def __init__(self, source):
- self.bullets = {}
- self.actions = {}
- self.fires = {}
-
- self._bullet_refs = []
- self._action_refs = []
- self._fire_refs = []
+ def __init__(self, type="none", bullets=None, fires=None, actions=None):
+ self.type = type
+ self.bullets = {} if bullets is None else bullets
+ self.actions = {} if actions is None else actions
+ self.fires = {} if fires is None else fires
+ @classmethod
+ def FromDocument(cls, source):
+ """Return a BulletML instance based on a string or file-like."""
if isinstance(source, (str, unicode)):
source = StringIO(source)
tree = ElementTree()
root = tree.parse(source)
if isinstance(source, (str, unicode)):
source = StringIO(source)
tree = ElementTree()
root = tree.parse(source)
- self.type = root.get("type", "none")
+ self = cls(type=root.get("type", "none"))
+
+ self._bullet_refs = []
+ self._action_refs = []
+ self._fire_refs = []
for element in root.getchildren():
tag = realtag(element)
for element in root.getchildren():
tag = realtag(element)
@@
-483,6
+503,8
@@
class BulletML(object):
self.actions.pop(None, None)
self.fires.pop(None, None)
self.actions.pop(None, None)
self.fires.pop(None, None)
+ return self
+
@property
def top(self):
"""Get a list of all top-level actions."""
@property
def top(self):
"""Get a list of all top-level actions."""