mirror of
https://github.com/YunoHost-Apps/zwave-js-ui_ynh.git
synced 2024-09-03 18:06:00 +02:00
139 lines
4.8 KiB
Python
139 lines
4.8 KiB
Python
|
|
__all__ = ['Composer', 'ComposerError']
|
|
|
|
from .error import MarkedYAMLError
|
|
from .events import *
|
|
from .nodes import *
|
|
|
|
class ComposerError(MarkedYAMLError):
|
|
pass
|
|
|
|
class Composer:
|
|
|
|
def __init__(self):
|
|
self.anchors = {}
|
|
|
|
def check_node(self):
|
|
# Drop the STREAM-START event.
|
|
if self.check_event(StreamStartEvent):
|
|
self.get_event()
|
|
|
|
# If there are more documents available?
|
|
return not self.check_event(StreamEndEvent)
|
|
|
|
def get_node(self):
|
|
# Get the root node of the next document.
|
|
if not self.check_event(StreamEndEvent):
|
|
return self.compose_document()
|
|
|
|
def get_single_node(self):
|
|
# Drop the STREAM-START event.
|
|
self.get_event()
|
|
|
|
# Compose a document if the stream is not empty.
|
|
document = None
|
|
if not self.check_event(StreamEndEvent):
|
|
document = self.compose_document()
|
|
|
|
# Ensure that the stream contains no more documents.
|
|
if not self.check_event(StreamEndEvent):
|
|
event = self.get_event()
|
|
raise ComposerError("expected a single document in the stream",
|
|
document.start_mark, "but found another document",
|
|
event.start_mark)
|
|
|
|
# Drop the STREAM-END event.
|
|
self.get_event()
|
|
|
|
return document
|
|
|
|
def compose_document(self):
|
|
# Drop the DOCUMENT-START event.
|
|
self.get_event()
|
|
|
|
# Compose the root node.
|
|
node = self.compose_node(None, None)
|
|
|
|
# Drop the DOCUMENT-END event.
|
|
self.get_event()
|
|
|
|
self.anchors = {}
|
|
return node
|
|
|
|
def compose_node(self, parent, index):
|
|
if self.check_event(AliasEvent):
|
|
event = self.get_event()
|
|
anchor = event.anchor
|
|
if anchor not in self.anchors:
|
|
raise ComposerError(None, None, "found undefined alias %r"
|
|
% anchor, event.start_mark)
|
|
return self.anchors[anchor]
|
|
event = self.peek_event()
|
|
anchor = event.anchor
|
|
if anchor is not None:
|
|
if anchor in self.anchors:
|
|
raise ComposerError("found duplicate anchor %r; first occurrence"
|
|
% anchor, self.anchors[anchor].start_mark,
|
|
"second occurrence", event.start_mark)
|
|
self.descend_resolver(parent, index)
|
|
if self.check_event(ScalarEvent):
|
|
node = self.compose_scalar_node(anchor)
|
|
elif self.check_event(SequenceStartEvent):
|
|
node = self.compose_sequence_node(anchor)
|
|
elif self.check_event(MappingStartEvent):
|
|
node = self.compose_mapping_node(anchor)
|
|
self.ascend_resolver()
|
|
return node
|
|
|
|
def compose_scalar_node(self, anchor):
|
|
event = self.get_event()
|
|
tag = event.tag
|
|
if tag is None or tag == '!':
|
|
tag = self.resolve(ScalarNode, event.value, event.implicit)
|
|
node = ScalarNode(tag, event.value,
|
|
event.start_mark, event.end_mark, style=event.style)
|
|
if anchor is not None:
|
|
self.anchors[anchor] = node
|
|
return node
|
|
|
|
def compose_sequence_node(self, anchor):
|
|
start_event = self.get_event()
|
|
tag = start_event.tag
|
|
if tag is None or tag == '!':
|
|
tag = self.resolve(SequenceNode, None, start_event.implicit)
|
|
node = SequenceNode(tag, [],
|
|
start_event.start_mark, None,
|
|
flow_style=start_event.flow_style)
|
|
if anchor is not None:
|
|
self.anchors[anchor] = node
|
|
index = 0
|
|
while not self.check_event(SequenceEndEvent):
|
|
node.value.append(self.compose_node(node, index))
|
|
index += 1
|
|
end_event = self.get_event()
|
|
node.end_mark = end_event.end_mark
|
|
return node
|
|
|
|
def compose_mapping_node(self, anchor):
|
|
start_event = self.get_event()
|
|
tag = start_event.tag
|
|
if tag is None or tag == '!':
|
|
tag = self.resolve(MappingNode, None, start_event.implicit)
|
|
node = MappingNode(tag, [],
|
|
start_event.start_mark, None,
|
|
flow_style=start_event.flow_style)
|
|
if anchor is not None:
|
|
self.anchors[anchor] = node
|
|
while not self.check_event(MappingEndEvent):
|
|
#key_event = self.peek_event()
|
|
item_key = self.compose_node(node, None)
|
|
#if item_key in node.value:
|
|
# raise ComposerError("while composing a mapping", start_event.start_mark,
|
|
# "found duplicate key", key_event.start_mark)
|
|
item_value = self.compose_node(node, item_key)
|
|
#node.value[item_key] = item_value
|
|
node.value.append((item_key, item_value))
|
|
end_event = self.get_event()
|
|
node.end_mark = end_event.end_mark
|
|
return node
|
|
|