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Diffstat (limited to 'powerline/lint/markedjson/resolver.py')
| -rw-r--r-- | powerline/lint/markedjson/resolver.py | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/powerline/lint/markedjson/resolver.py b/powerline/lint/markedjson/resolver.py new file mode 100644 index 0000000..fa8ceaa --- /dev/null +++ b/powerline/lint/markedjson/resolver.py @@ -0,0 +1,131 @@ +# vim:fileencoding=utf-8:noet +from __future__ import (unicode_literals, division, absolute_import, print_function) + +import re + +from powerline.lint.markedjson.error import MarkedError +from powerline.lint.markedjson import nodes + + +class ResolverError(MarkedError): + pass + + +class BaseResolver: + DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str' + DEFAULT_SEQUENCE_TAG = 'tag:yaml.org,2002:seq' + DEFAULT_MAPPING_TAG = 'tag:yaml.org,2002:map' + + yaml_implicit_resolvers = {} + yaml_path_resolvers = {} + + def __init__(self): + self.resolver_exact_paths = [] + self.resolver_prefix_paths = [] + + @classmethod + def add_implicit_resolver(cls, tag, regexp, first): + if 'yaml_implicit_resolvers' not in cls.__dict__: + cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy() + if first is None: + first = [None] + for ch in first: + cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp)) + + def descend_resolver(self, current_node, current_index): + if not self.yaml_path_resolvers: + return + exact_paths = {} + prefix_paths = [] + if current_node: + depth = len(self.resolver_prefix_paths) + for path, kind in self.resolver_prefix_paths[-1]: + if self.check_resolver_prefix(depth, path, kind, current_node, current_index): + if len(path) > depth: + prefix_paths.append((path, kind)) + else: + exact_paths[kind] = self.yaml_path_resolvers[path, kind] + else: + for path, kind in self.yaml_path_resolvers: + if not path: + exact_paths[kind] = self.yaml_path_resolvers[path, kind] + else: + prefix_paths.append((path, kind)) + self.resolver_exact_paths.append(exact_paths) + self.resolver_prefix_paths.append(prefix_paths) + + def ascend_resolver(self): + if not self.yaml_path_resolvers: + return + self.resolver_exact_paths.pop() + self.resolver_prefix_paths.pop() + + def check_resolver_prefix(self, depth, path, kind, current_node, current_index): + node_check, index_check = path[depth - 1] + if isinstance(node_check, str): + if current_node.tag != node_check: + return + elif node_check is not None: + if not isinstance(current_node, node_check): + return + if index_check is True and current_index is not None: + return + if ((index_check is False or index_check is None) + and current_index is None): + return + if isinstance(index_check, str): + if not (isinstance(current_index, nodes.ScalarNode) and index_check == current_index.value): + return + elif isinstance(index_check, int) and not isinstance(index_check, bool): + if index_check != current_index: + return + return True + + def resolve(self, kind, value, implicit, mark=None): + if kind is nodes.ScalarNode and implicit[0]: + if value == '': + resolvers = self.yaml_implicit_resolvers.get('', []) + else: + resolvers = self.yaml_implicit_resolvers.get(value[0], []) + resolvers += self.yaml_implicit_resolvers.get(None, []) + for tag, regexp in resolvers: + if regexp.match(value): + return tag + else: + self.echoerr( + 'While resolving plain scalar', None, + 'expected floating-point value, integer, null or boolean, but got %r' % value, + mark + ) + return self.DEFAULT_SCALAR_TAG + if kind is nodes.ScalarNode: + return self.DEFAULT_SCALAR_TAG + elif kind is nodes.SequenceNode: + return self.DEFAULT_SEQUENCE_TAG + elif kind is nodes.MappingNode: + return self.DEFAULT_MAPPING_TAG + + +class Resolver(BaseResolver): + pass + + +Resolver.add_implicit_resolver( + 'tag:yaml.org,2002:bool', + re.compile(r'''^(?:true|false)$''', re.X), + list('yYnNtTfFoO')) + +Resolver.add_implicit_resolver( + 'tag:yaml.org,2002:float', + re.compile(r'^-?(?:0|[1-9]\d*)(?=[.eE])(?:\.\d+)?(?:[eE][-+]?\d+)?$', re.X), + list('-0123456789')) + +Resolver.add_implicit_resolver( + 'tag:yaml.org,2002:int', + re.compile(r'^(?:0|-?[1-9]\d*)$', re.X), + list('-0123456789')) + +Resolver.add_implicit_resolver( + 'tag:yaml.org,2002:null', + re.compile(r'^null$', re.X), + ['n']) |