diff options
Diffstat (limited to 'generator/plugins/python')
| -rw-r--r-- | generator/plugins/python/__init__.py | 4 | ||||
| -rw-r--r-- | generator/plugins/python/utils.py | 1122 |
2 files changed, 1126 insertions, 0 deletions
diff --git a/generator/plugins/python/__init__.py b/generator/plugins/python/__init__.py new file mode 100644 index 0000000..c5de3ef --- /dev/null +++ b/generator/plugins/python/__init__.py @@ -0,0 +1,4 @@ +# Copyright (c) Microsoft Corporation. All rights reserved. +# Licensed under the MIT License. + +from .utils import generate_from_spec as generate diff --git a/generator/plugins/python/utils.py b/generator/plugins/python/utils.py new file mode 100644 index 0000000..1d5f08d --- /dev/null +++ b/generator/plugins/python/utils.py @@ -0,0 +1,1122 @@ +# Copyright (c) Microsoft Corporation. All rights reserved. +# Licensed under the MIT License. + +import collections +import copy +import itertools +import keyword +import pathlib +import re +from typing import Dict, List, Optional, OrderedDict, Sequence, Tuple, Union + +import generator.model as model + +METHOD_NAME_RE_1 = re.compile(r"(.)([A-Z][a-z]+)") +METHOD_NAME_RE_2 = re.compile(r"([a-z0-9])([A-Z])") +PACKAGE_NAME = "lsprotocol" + +# These are special type aliases to preserve backward compatibility. +custom_request_params_aliases = ["WorkspaceConfigurationParams"] + + +def generate_from_spec(spec: model.LSPModel, output_dir: str) -> None: + code = TypesCodeGenerator(spec).get_code() + + output_path = pathlib.Path(output_dir, PACKAGE_NAME) + if not output_path.exists(): + output_path.mkdir(parents=True, exist_ok=True) + + for file_name in code: + (output_path / file_name).write_text(code[file_name], encoding="utf-8") + + +def _generate_field_validator( + type_def: model.LSP_TYPE_SPEC, optional: bool = False +) -> str: + """Generates attrs.field validator for a given field base of type.""" + + if type_def.kind == "base": + if type_def.name == "integer": + validator = "validators.integer_validator" + elif type_def.name == "uinteger": + validator = "validators.uinteger_validator" + elif type_def.name in ["string", "DocumentUri", "URI", "Uri"]: + validator = "attrs.validators.instance_of(str)" + elif type_def.name == "boolean": + validator = "attrs.validators.instance_of(bool)" + elif type_def.name == "decimal": + validator = "attrs.validators.instance_of(float)" + else: + validator = None + elif type_def.kind == "stringLiteral": + return f"attrs.field(validator=attrs.validators.in_(['{type_def.value}']), default='{type_def.value}')" + else: + validator = None + + if optional: + if validator: + return f"attrs.field(validator=attrs.validators.optional({validator}), default=None)" + else: + return "attrs.field(default=None)" + else: + if validator: + return f"attrs.field(validator={validator})" + else: + return "attrs.field()" + + +def _to_class_name(lsp_method_name: str) -> str: + """Convert from LSP method name (e.g., textDocument/didSave) to python class name + (e.g., TextDocumentDidSave)""" + name = lsp_method_name[2:] if lsp_method_name.startswith("$/") else lsp_method_name + name = name.replace("/", "_") + name = METHOD_NAME_RE_1.sub(r"\1_\2", name) + name = METHOD_NAME_RE_2.sub(r"\1_\2", name) + return "".join(part.title() for part in name.split("_")) + + +def lines_to_str(lines: Union[Sequence[str], List[str]]) -> str: + return "\n".join(lines) + + +def _sanitize_comment(text: str) -> str: + """LSP spec comments can contain newlines or characters that should not be used or + can cause issues with python code clean them up.""" + return text.replace("\r", "").replace("\n", "") + + +def _is_special_field(prop: model.Property) -> bool: + """Detect if the field requires special handling when serialising.""" + return prop.type.kind == "stringLiteral" or _has_null_base_type(prop) + + +def _has_null_base_type(prop: model.Property) -> bool: + """Detect if the type is indirectly optional.""" + if prop.type.kind == "or": + # If one of the types in the item list is a `null` then that means the + # field can be None. So we can treat that field as optional. + return any(t.kind == "base" and t.name == "null" for t in prop.type.items) + else: + return False + + +def _to_snake_case(name: str) -> str: + new_name = METHOD_NAME_RE_1.sub(r"\1_\2", name) + new_name = METHOD_NAME_RE_2.sub(r"\1_\2", new_name) + new_name = new_name.lower() + return f"{new_name}_" if keyword.iskeyword(new_name) else new_name + + +def _snake_case_item_name(original: str) -> str: + """Generate snake case names from LSP definition names. + + Example: + * PlainText -> PLAIN_TEXT + * $import -> IMPORT + """ + new_name = original + if new_name.startswith("$"): + new_name = new_name[1:] + if new_name.startswith("/"): + new_name = new_name[1:] + new_name = new_name.replace("/", "_") + new_name = re.sub("(.)([A-Z][a-z]+)", r"\1_\2", new_name) + new_name = re.sub("([a-z0-9])([A-Z])", r"\1_\2", new_name) + return f"{new_name}_" if keyword.iskeyword(new_name) else new_name + + +def _capitalized_item_name(original: str) -> str: + """Generate capitalized names from LSP definition names. + + Example: + * someClass -> SomeClass + * some_class -> SomeClass + """ + parts = _snake_case_item_name(original).split("_") + new_name = "".join(x.title() for x in parts) + return f"{new_name}_" if keyword.iskeyword(new_name) else new_name + + +def _get_indented_documentation( + documentation: Optional[str], indent: str = "" +) -> Optional[str]: + """Clean up doc string from LSP model and word wrap with correct indent level.""" + doc = ( + indent.join(documentation.splitlines(keepends=True)) if documentation else None + ) + if doc: + doc = doc.replace("**/*", "**/*").replace("∕", "/") + doc = doc[:-2] if doc.endswith("*/") else doc + doc = doc.strip() + doc = re.sub(r"\[(?P<class>[A-Za-z]*)\]\(\#(?P=class)\)", r"\1", doc) + doc = re.sub(r"\[(?P<class>[\S]*)(\[\])\]\(\#(?P=class)\)", r"\1\2", doc) + doc = re.sub(r"\[([\w\ ]+)\]\(\#[\w\.]+\)", r"\1", doc) + return doc + + +class TypesCodeGenerator: + def __init__(self, lsp_model: model.LSPModel): + self._lsp_model = lsp_model + self._reset() + + def _reset(self): + self._types: OrderedDict[str, List[str]] = collections.OrderedDict() + self._imports: List[str] = [ + "import enum", + "import functools", + "from typing import Any, Dict, List, Optional, Tuple, Union", + "import attrs", + "from . import validators", + ] + self._keyword_classes: List[str] = [] + self._special_classes: List[str] = [] + self._special_properties: List[str] = [] + + def _add_keyword_class(self, class_name) -> None: + if class_name not in self._keyword_classes: + self._keyword_classes.append(class_name) + + def _get_imports(self) -> List[str]: + return self._imports + + def _get_header(self) -> List[str]: + return [ + "# Copyright (c) Microsoft Corporation. All rights reserved.", + "# Licensed under the MIT License.", + "", + "# ****** THIS IS A GENERATED FILE, DO NOT EDIT. ******", + "# Steps to generate:", + "# 1. Checkout https://github.com/microsoft/lsprotocol", + "# 2. Install nox: `python -m pip install nox`", + "# 3. Run command: `python -m nox --session build_lsp`", + "", + ] + + def get_code(self) -> Dict[str, str]: + self._reset() + self._generate_code(self._lsp_model) + + code_lines = ( + self._get_header() + + self._get_imports() + + self._get_meta_data(self._lsp_model) + + self._get_types_code() + + self._get_utility_code(self._lsp_model) + ) + return { + "types.py": lines_to_str(code_lines), + } + + def _get_custom_value_type(self, ref_name: str) -> Optional[str]: + """Returns the custom supported type.""" + try: + enum_def = [e for e in self._lsp_model.enumerations if e.name == ref_name][ + 0 + ] + except IndexError: + enum_def = None + if enum_def and enum_def.supportsCustomValues: + if enum_def.type.name == "string": + return "str" + if enum_def.type.name in ["integer", "uinteger"]: + return "int" + return None + + def _generate_type_name( + self, + type_def: model.LSP_TYPE_SPEC, + class_name: Optional[str] = None, + prefix: str = "", + ) -> str: + """Get typing wrapped type name based on LSP type definition.""" + + if type_def.kind == "stringLiteral": + # These are string constants used in some LSP types. + # TODO: Use this with python >= 3.8 + # return f"Literal['{type_def.value}']" + return "str" + + if type_def.kind == "literal": + # A general type 'Any' has no properties + if ( + isinstance(type_def.value, model.LiteralValue) + and len(type_def.value.properties) == 0 + ): + return "Any" + + # The literal kind is a dynamically generated type and the + # name for it is generated as needed. It is expected that when + # this function is called name is set. + if type_def.name: + return f"'{type_def.name}'" + + # If name is missing, and there are properties then it is a dynamic + # type. It should have already been generated. + raise ValueError(str(type_def)) + + if type_def.kind == "reference": + # The reference kind is a named type which is part of LSP. + if self._has_type(type_def.name): + ref_type = f"{prefix}{type_def.name}" + else: + # We don't have this type yet. Make it a forward reference. + ref_type = f"'{prefix}{type_def.name}'" + custom_value_type = self._get_custom_value_type(type_def.name) + if custom_value_type: + return f"Union[{ref_type}, {custom_value_type}]" + + return ref_type + + if type_def.kind == "array": + # This is a linear collection type, LSP does not specify if + # this needs to be ordered. Also, usingList here because + # cattrs does not work well withIterable for some reason. + return f"List[{self._generate_type_name(type_def.element, class_name, prefix)}]" + + if type_def.kind == "or": + # This type means that you can have either of the types under `items` + # as the value. So, from typing point of view this is a union. The `or` + # type means it is going to be one of the types, never both (see `and`) + # Example: + # id :Union[str, int] + # * This means that id can either be string or integer, cannot be both. + types = [] + for item in type_def.items: + types.append(self._generate_type_name(item, class_name, prefix)) + return f"Union[{','.join(types)}]" + + if type_def.kind == "and": + # This type means that the value has properties of all the types under + # `items`. This type is equivalent of `class C(A, B)`. Where A and B are + # defined in `items`. This type should be generated separately, here we + # return the optionally provided class for this. + if not class_name: + raise ValueError(str(type_def)) + return class_name + + if type_def.kind == "base": + # The `base` kind is used for primitive data types. + if type_def.name == "decimal": + return "float" + elif type_def.name == "boolean": + return "bool" + elif type_def.name in ["integer", "uinteger"]: + return "int" + elif type_def.name in ["string", "DocumentUri", "URI"]: + return "str" + elif type_def.name == "null": + return "None" + else: + # Unknown base kind. + raise ValueError(str(type_def)) + + if type_def.kind == "map": + # This kind defines a dictionary like object. + return f"Dict[{self._generate_type_name(type_def.key, class_name, prefix)}, {self._generate_type_name(type_def.value, class_name, prefix)}]" + + if type_def.kind == "tuple": + # This kind defined a tuple like object. + types = [] + for item in type_def.items: + types.append(self._generate_type_name(item, class_name, prefix)) + return f"Tuple[{','.join(types)}]" + + raise ValueError(str(type_def)) + + def _add_special(self, class_name: str, properties: List[str]) -> None: + if properties: + self._special_classes.append(class_name) + self._special_properties.extend([f"'{class_name}.{p}'" for p in properties]) + + def _get_types_code(self) -> List[str]: + code_lines = [] + for v in self._types.values(): + code_lines.extend(v) + # Add blank lines between types + code_lines.extend(["", ""]) + + return code_lines + + def _add_import(self, import_line: str) -> None: + if import_line not in self._imports: + self._imports.append(import_line) + + def _has_type(self, type_name: str) -> bool: + if type_name.startswith(('"', "'")): + type_name = type_name[1:-1] + return type_name in self._types + + def _get_additional_methods(self, class_name: str) -> List[str]: + indent = " " * 4 + if class_name == "Position": + return [ + "def __eq__(self, o: object) -> bool:", + f"{indent}if not isinstance(o, Position):", + f"{indent}{indent}return NotImplemented", + f"{indent}return (self.line, self.character) == (o.line, o.character)", + "def __gt__(self, o: 'Position') -> bool:", + f"{indent}if not isinstance(o, Position):", + f"{indent}{indent}return NotImplemented", + f"{indent}return (self.line, self.character) > (o.line, o.character)", + "def __repr__(self) -> str:", + f"{indent}" + "return f'{self.line}:{self.character}'", + ] + if class_name == "Range": + return [ + "def __eq__(self, o: object) -> bool:", + f"{indent}if not isinstance(o, Range):", + f"{indent}{indent}return NotImplemented", + f"{indent}return (self.start == o.start) and (self.end == o.end)", + "def __repr__(self) -> str:", + f"{indent}" + "return f'{self.start!r}-{self.end!r}'", + ] + if class_name == "Location": + return [ + "def __eq__(self, o: object) -> bool:", + f"{indent}if not isinstance(o, Location):", + f"{indent}{indent}return NotImplemented", + f"{indent}return (self.uri == o.uri) and (self.range == o.range)", + "def __repr__(self) -> str:", + f"{indent}" + "return f'{self.uri}:{self.range!r}'", + ] + return None + + def _add_type_code(self, type_name: str, code: List[str]) -> None: + if not self._has_type(type_name): + self._types[type_name] = code + self._types.move_to_end(type_name) + + def _add_enum(self, enum_def: model.Enum) -> None: + code_lines = [ + "" if "ErrorCodes" in enum_def.name else "@enum.unique", + ] + if enum_def.type.name == "string": + code_lines += [f"class {enum_def.name}(str, enum.Enum):"] + elif enum_def.type.name in ["integer", "uinteger"]: + code_lines += [f"class {enum_def.name}(int, enum.Enum):"] + else: + code_lines += [f"class {enum_def.name}(enum.Enum):"] + + indent = " " * 4 + doc = _get_indented_documentation(enum_def.documentation, indent) + code_lines += [ + f'{indent}"""{doc}"""' if enum_def.documentation else "", + f"{indent}# Since: {_sanitize_comment(enum_def.since)}" + if enum_def.since + else "", + f"{indent}# Proposed" if enum_def.proposed else "", + ] + + # Remove unnecessary empty lines + code_lines = [code for code in code_lines if len(code) > 0] + + for item in enum_def.values: + name = _capitalized_item_name(item.name) + value = ( + f'"{item.value}"' if enum_def.type.name == "string" else f"{item.value}" + ) + doc = _get_indented_documentation(item.documentation, indent) + item_lines = [ + f"{indent}{name} = {value}", + f'{indent}"""{doc}"""' if item.documentation else "", + f"{indent}# Since: {_sanitize_comment(item.since)}" + if item.since + else "", + f"{indent}# Proposed" if item.proposed else "", + ] + + # Remove unnecessary empty lines. + code_lines += [code for code in item_lines if len(code) > 0] + + self._add_type_code(enum_def.name, code_lines) + + def _add_enums(self, lsp_model: model.LSPModel) -> None: + for enum_def in lsp_model.enumerations: + self._add_enum(enum_def) + + def _process_literal_types( + self, class_name: str, type_def: model.LSP_TYPE_SPEC + ) -> None: + if type_def.kind == "literal" and len(type_def.value.properties) > 0: + type_def.name = type_def.name or _to_class_name(f"{class_name}_Type") + self._add_literal_type(type_def) + elif type_def.kind == "or": + count = itertools.count(1) + for sub_type in type_def.items or []: + try: + # Anonymous types have no name so generate a name. We append `_Type#` + # to generate the name, where `#` is a number. + sub_type.name = sub_type.name or _to_class_name( + f"{class_name}_Type{next(count)}" + ) + except AttributeError: + pass + self._process_literal_types(class_name, sub_type) + elif type_def.kind == "array": + try: + type_def.element.name = type_def.element.name or _to_class_name( + f"{class_name}_Type" + ) + except AttributeError: + pass + self._process_literal_types(class_name, type_def.element) + elif type_def.kind == "and": + raise ValueError(str(type_def)) + else: + pass + + def _generate_properties( + self, class_name: str, properties: List[model.Property], indent: str + ) -> List[str]: + code_lines = [] + + # Ensure that we mark any property as optional if it supports None type. + # We only need to do this for properties not explicitly marked as optional. + for p in properties: + if not p.optional: + p.optional = _has_null_base_type(p) + + # sort properties so that you have non-optional properties first then optional properties + properties = [ + p for p in properties if not (p.optional or p.type.kind == "stringLiteral") + ] + [p for p in properties if p.optional or p.type.kind == "stringLiteral"] + + for property_def in properties: + self._process_literal_types( + f"{class_name}/{property_def.name}", property_def.type + ) + + doc = _get_indented_documentation(property_def.documentation, indent) + type_validator = _generate_field_validator( + property_def.type, property_def.optional + ) + + type_name = self._generate_type_name(property_def.type) + if property_def.optional: + type_name = f"Optional[{type_name}]" + + # make sure that property name is not a python keyword and snake cased. + name = _to_snake_case(property_def.name) + + prop_lines = [f"{indent}{name}: {type_name} = {type_validator}"] + prop_lines += [ + f'{indent}"""{doc}"""' if property_def.documentation else "", + f"{indent}# Since: {_sanitize_comment(property_def.since)}" + if property_def.since + else "", + f"{indent}# Proposed" if property_def.proposed else "", + ] + # Remove unnecessary empty lines and add a single empty line + code_lines += [code for code in prop_lines if len(code) > 0] + [""] + + return code_lines + + def _add_literal_type(self, literal_def: model.LiteralType) -> None: + if self._has_type(literal_def.name): + return + + # indent level for use with fields, doc string, and comments. + indent = " " * 4 + + # clean up the docstring for the class itself. + doc = _get_indented_documentation(literal_def.documentation, indent) + + # Code here should include class, its doc string, and any comments. + code_lines = [ + "@attrs.define", + f"class {literal_def.name}:", + f'{indent}"""{doc}"""' if literal_def.documentation else "", + f"{indent}# Since: {literal_def.since}" if literal_def.since else "", + f"{indent}# Proposed" if literal_def.proposed else "", + ] + + # Remove unnecessary empty lines. This can happen if doc string or comments are missing. + code_lines = [code for code in code_lines if len(code) > 0] + + code_lines += self._generate_properties( + literal_def.name, literal_def.value.properties, indent + ) + + self._add_type_code(literal_def.name, code_lines) + + if any(keyword.iskeyword(p.name) for p in literal_def.value.properties): + self._add_keyword_class(literal_def.name) + + self._add_special( + literal_def.name, + [ + _to_snake_case(p.name) + for p in literal_def.value.properties + if _is_special_field(p) + ], + ) + + def _add_type_alias(self, type_alias: model.TypeAlias) -> None: + # TypeAlias definition can contain anonymous types as a part of its + # definition. We generate them here first before we get to defile the + # TypeAlias. + indent = " " * 4 + count = itertools.count(1) + if type_alias.type.kind == "or": + for sub_type in type_alias.type.items or []: + if sub_type.kind == "literal": + # Anonymous types have no name so generate a name. We append `_Type#` + # to generate the name, where `#` is a number. + sub_type.name = ( + sub_type.name or f"{type_alias.name}_Type{next(count)}" + ) + self._add_literal_type(sub_type) + + if type_alias.name == "LSPAny": + type_name = "Union[Any, None]" + elif type_alias.name == "LSPObject": + type_name = None + else: + type_name = self._generate_type_name(type_alias.type) + if type_alias.type.kind == "reference" and not self._has_type( + type_alias.type.name + ): + # TODO: remove workaround for lack of TypeAlias in 3.7 + type_name = f"Union[{type_name}, {type_name}]" + + if type_name: + # clean up the docstring for the class itself. + doc = _get_indented_documentation(type_alias.documentation) + code_lines = [ + f"{type_alias.name} = {type_name}", + f'"""{doc}"""' if type_alias.documentation else "", + f"# Since: {_sanitize_comment(type_alias.since)}" + if type_alias.since + else "", + f"# Proposed" if type_alias.proposed else "", + ] + else: + doc = _get_indented_documentation(type_alias.documentation, indent) + code_lines = [ + f"class {type_alias.name}:", + f'{indent}"""{doc}"""' if type_alias.documentation else "", + f"{indent}# Since: {_sanitize_comment(type_alias.since)}" + if type_alias.since + else "", + f"{indent}# Proposed" if type_alias.proposed else "", + f"{indent}pass", + ] + code_lines = [code for code in code_lines if len(code) > 0] + + self._add_type_code(type_alias.name, code_lines) + + def _add_type_aliases(self, lsp_model: model.LSPModel) -> None: + for type_def in lsp_model.typeAliases: + self._add_type_alias(type_def) + + def _get_dependent_types( + self, + struct_def: model.Structure, + lsp_model: model.LSPModel, + ) -> List[model.Structure]: + # `extends` and `mixins` both are used as classes from which the + # current class to derive from. + extends = struct_def.extends or [] + mixins = struct_def.mixins or [] + + definitions: List[model.Structure] = [] + for s in extends + mixins: + for t in lsp_model.structures: + if t.name == s.name and s.kind == "reference": + definitions.append(t) + definitions.extend(self._get_dependent_types(t, lsp_model)) + + result: List[model.Structure] = [] + for d in definitions: + if d.name in [r.name for r in result]: + pass + else: + result.append(d) + return result + + def _add_structure( + self, + struct_def: model.Structure, + lsp_model: model.LSPModel, + ) -> None: + if self._has_type(struct_def.name): + return + + definitions = self._get_dependent_types(struct_def, lsp_model) + for d in definitions: + self._add_structure(d, lsp_model) + + indent = "" if struct_def.name == "LSPObject" else " " * 4 + doc = _get_indented_documentation(struct_def.documentation, indent) + class_name = struct_def.name + + class_lines = [ + "" if class_name == "LSPObject" else "@attrs.define", + "@functools.total_ordering" if class_name == "Position" else "", + f"{class_name} = object" + if class_name == "LSPObject" + else f"class {class_name}:", + f'{indent}"""{doc}"""' if struct_def.documentation else "", + f"{indent}# Since: {_sanitize_comment(struct_def.since)}" + if struct_def.since + else "", + f"{indent}# Proposed" if struct_def.proposed else "", + ] + + # Remove unnecessary empty lines and add a single empty line + code_lines = [code for code in class_lines if len(code) > 0] + [""] + + # Inheriting from multiple classes can cause problems especially when using + # `attrs.define`. + properties = copy.deepcopy(struct_def.properties) + extra_properties = [] + for d in definitions: + extra_properties += copy.deepcopy(d.properties) + + for p in extra_properties: + prop_names = [prop.name for prop in properties] + if p.name not in prop_names: + properties += [copy.deepcopy(p)] + + code_lines += self._generate_properties(class_name, properties, indent) + methods = self._get_additional_methods(class_name) + + # If the class has no properties then add `pass` + if len(properties) == 0 and not methods and class_name != "LSPObject": + code_lines += [f"{indent}pass"] + + if methods: + code_lines += [f"{indent}{l}" for l in methods] + + # Detect if the class has properties that might be keywords. + self._add_type_code(class_name, code_lines) + + if any(keyword.iskeyword(p.name) for p in properties): + self._add_keyword_class(class_name) + + self._add_special( + class_name, + [_to_snake_case(p.name) for p in properties if _is_special_field(p)], + ) + + def _add_structures(self, lsp_model: model.LSPModel) -> None: + for struct_def in lsp_model.structures: + self._add_structure(struct_def, lsp_model) + + def _add_and_type( + self, + type_def: model.LSP_TYPE_SPEC, + class_name: str, + structures: List[model.Structure], + ) -> Tuple[List[str], List[str]]: + if type_def.kind != "and": + raise ValueError("Only `and` type code generation is supported.") + + indent = " " * 4 + code_lines = [ + "@attrs.define", + f"class {class_name}:", + ] + + properties = [] + for item in type_def.items: + if item.kind == "reference": + for structure in structures: + if structure.name == item.name: + properties += copy.deepcopy(structure.properties) + else: + raise ValueError( + "Only `reference` types are supported for `and` type generation." + ) + + code_lines += self._generate_properties(class_name, properties, indent) + + self._add_type_code(class_name, code_lines) + if any(keyword.iskeyword(p.name) for p in properties): + self._add_keyword_class(class_name) + + self._add_special( + class_name, + [_to_snake_case(p.name) for p in properties if _is_special_field(p)], + ) + + def _add_and_types(self, lsp_model: model.LSPModel) -> None: + # Collect all and types in the model from known locations + and_types = [] + for request in lsp_model.requests: + if request.params: + if request.params.kind == "and": + class_name = f"{_to_class_name(request.method)}Params" + and_types.append((f"{class_name}", request.params)) + + if request.registrationOptions: + if request.registrationOptions.kind == "and": + class_name = f"{_to_class_name(request.method)}Options" + and_types.append((f"{class_name}", request.registrationOptions)) + + for notification in lsp_model.notifications: + if notification.params: + if notification.params.kind == "and": + class_name = f"{_to_class_name(notification.method)}Params" + and_types.append((f"{class_name}", notification.params)) + + if notification.registrationOptions: + if notification.registrationOptions.kind == "and": + class_name = f"{_to_class_name(notification.method)}Options" + and_types.append( + (f"{class_name}", notification.registrationOptions) + ) + + for name, type_def in and_types: + self._add_and_type(type_def, name, lsp_model.structures) + + def _add_requests(self, lsp_mode: model.LSPModel) -> None: + indent = " " * 4 + + self._add_type_code( + "ResponseError", + [ + "@attrs.define", + f"class ResponseError:", + f"{indent}code: int = attrs.field(validator=validators.integer_validator)", + f'{indent}"""A number indicating the error type that occurred."""', + f"{indent}message: str = attrs.field(validator=attrs.validators.instance_of(str))", + f'{indent}"""A string providing a short description of the error."""', + f"{indent}data:Optional[LSPAny] = attrs.field(default=None)", + f'{indent}"""A primitive or structured value that contains additional information', + f'{indent}about the error. Can be omitted."""', + ], + ) + + self._add_type_code( + "ResponseErrorMessage", + [ + "@attrs.define", + "class ResponseErrorMessage:", + f"{indent}id:Optional[Union[int, str]] = attrs.field(default=None)", + f'{indent}"""The request id where the error occurred."""', + f"{indent}error:Optional[ResponseError] = attrs.field(default=None)", + f'{indent}"""The error object in case a request fails."""', + f'{indent}jsonrpc: str = attrs.field(default="2.0")', + ], + ) + + self._add_special("ResponseErrorMessage", ["error", "jsonrpc"]) + + for request in lsp_mode.requests: + class_name = _to_class_name(request.method) + doc = _get_indented_documentation(request.documentation, indent) + + if request.params: + if ( + request.params.kind == "reference" + and f"{class_name}Params" in custom_request_params_aliases + ): + params_type = f"{class_name}Params" + + self._add_type_alias( + model.TypeAlias( + name=params_type, + type={"kind": "reference", "name": request.params.name}, + ) + ) + else: + params_type = self._generate_type_name( + request.params, f"{class_name}Params" + ) + if not self._has_type(params_type): + raise ValueError(f"{class_name}Params type definition is missing.") + params_field = "attrs.field()" + else: + params_type = "Optional[None]" + params_field = "attrs.field(default=None)" + + result_type = None + if request.result: + result_type = self._generate_type_name(request.result) + result_field = "attrs.field(default=None)" + else: + result_type = "Optional[None]" + result_field = "attrs.field(default=None)" + + self._add_type_code( + f"{class_name}Request", + [ + "@attrs.define", + f"class {class_name}Request:", + f'{indent}"""{doc}"""' if request.documentation else "", + f"{indent}id:Union[int, str] = attrs.field()", + f'{indent}"""The request id."""', + f"{indent}params: {params_type} ={params_field}", + f'{indent}method: str = "{request.method}"', + f'{indent}"""The method to be invoked."""', + f'{indent}jsonrpc: str = attrs.field(default="2.0")', + ], + ) + self._add_special(f"{class_name}Request", ["method", "jsonrpc"]) + + self._add_type_code( + f"{class_name}Response", + [ + "@attrs.define", + f"class {class_name}Response:", + f"{indent}id:Optional[Union[int, str]] = attrs.field()", + f'{indent}"""The request id."""', + f"{indent}result: {result_type} = {result_field}", + f'{indent}jsonrpc: str = attrs.field(default="2.0")', + ], + ) + self._add_special(f"{class_name}Response", ["result", "jsonrpc"]) + + def _add_notifications(self, lsp_mode: model.LSPModel) -> None: + indent = " " * 4 + + for notification in lsp_mode.notifications: + class_name = _to_class_name(notification.method) + doc = _get_indented_documentation(notification.documentation, indent) + + if notification.params: + params_type = self._generate_type_name( + notification.params, f"{class_name}Params" + ) + if not self._has_type(params_type): + raise ValueError(f"{class_name}Params type definition is missing.") + params_field = "attrs.field()" + else: + params_type = "Optional[None]" + params_field = "attrs.field(default=None)" + + self._add_type_code( + f"{class_name}Notification", + [ + "@attrs.define", + f"class {class_name}Notification:", + f'{indent}"""{doc}"""' if notification.documentation else "", + f"{indent}params: {params_type} = {params_field}", + f"{indent}method:str = attrs.field(", + f'validator=attrs.validators.in_(["{notification.method}"]),', + f'default="{notification.method}",', + ")", + f'{indent}"""The method to be invoked."""', + f'{indent}jsonrpc: str = attrs.field(default="2.0")', + ], + ) + self._add_special(f"{class_name}Notification", ["method", "jsonrpc"]) + + def _add_lsp_method_type(self, lsp_model: model.LSPModel) -> None: + indent = " " * 4 + directions = set( + [x.messageDirection for x in (lsp_model.requests + lsp_model.notifications)] + ) + code_lines = [ + "@enum.unique", + "class MessageDirection(enum.Enum):", + ] + code_lines += sorted( + [f"{indent}{_capitalized_item_name(m)} = '{m}'" for m in directions] + ) + self._add_type_code("MessageDirection", code_lines) + + def _add_special_types(self, lsp_model: model.LSPModel) -> None: + # Ensure LSPObject gets added first. + # Try and find it in the type aliases + lsp_object = list( + filter( + lambda s: s.name == "LSPObject", + [*lsp_model.typeAliases, *lsp_model.structures], + ) + ) + + if len(lsp_object) == 0: + raise ValueError("LSPObject type definition is missing.") + elif len(lsp_object) > 1: + raise ValueError("LSPObject type definition is duplicated.") + else: + if isinstance(lsp_object[0], model.TypeAlias): + self._add_type_alias(lsp_object[0]) + elif isinstance(lsp_object[0], model.Structure): + self._add_structure(lsp_object[0], lsp_model) + else: + raise ValueError("LSPObject type definition is invalid.") + + def _generate_code(self, lsp_model: model.LSPModel) -> None: + self._add_enums(lsp_model) + self._add_special_types(lsp_model) + self._add_type_aliases(lsp_model) + self._add_structures(lsp_model) + self._add_and_types(lsp_model) + self._add_requests(lsp_model) + self._add_notifications(lsp_model) + self._add_lsp_method_type(lsp_model) + + def _get_utility_code(self, lsp_model: model.LSPModel) -> List[str]: + request_classes = [] + response_classes = [] + notification_classes = [] + + methods = set( + [x.method for x in (lsp_model.requests + lsp_model.notifications)] + ) + code_lines = ( + [""] + + sorted([f"{_snake_case_item_name(m).upper()} = '{m}'" for m in methods]) + + [""] + ) + + code_lines += ["METHOD_TO_TYPES = {", " # Requests"] + + request_types = [] + for request in lsp_model.requests: + class_name = _to_class_name(request.method) + request_class = f"{class_name}Request" + response_class = f"{class_name}Response" + + request_classes.append(request_class) + response_classes.append(response_class) + + params_type = None + if request.params: + params_type = self._generate_type_name( + request.params, f"{class_name}Params" + ).strip("\"'") + + registration_type = None + if request.registrationOptions: + registration_type = self._generate_type_name( + request.registrationOptions, f"{class_name}Options" + ).strip("\"'") + + key = f"{_snake_case_item_name(request.method).upper()}" + request_types += [ + f"{key}: ({request_class}, {response_class}, {params_type}, {registration_type})," + ] + + code_lines += sorted(request_types) + code_lines += [" # Notifications"] + + notify_types = [] + for notification in lsp_model.notifications: + class_name = _to_class_name(notification.method) + notification_class = f"{class_name}Notification" + notification_classes.append(notification_class) + + params_type = None + if notification.params: + params_type = self._generate_type_name( + notification.params, f"{class_name}Params" + ).strip("\"'") + + registration_type = None + if notification.registrationOptions: + registration_type = self._generate_type_name( + notification.registrationOptions, f"{class_name}Options" + ).strip("\"'") + + key = f"{_snake_case_item_name(notification.method).upper()}" + notify_types += [ + f"{key}: ({notification_class}, None, {params_type}, {registration_type})," + ] + + code_lines += sorted(notify_types) + code_lines += ["}"] + + code_lines += [ + f"REQUESTS = Union[{', '.join(sorted(request_classes))}]", + f"RESPONSES = Union[{', '.join(sorted(response_classes))}]", + f"NOTIFICATIONS = Union[{', '.join(sorted(notification_classes))}]", + "MESSAGE_TYPES = Union[REQUESTS, RESPONSES, NOTIFICATIONS, ResponseErrorMessage]", + "", + ] + + # These classes have properties that may be python keywords. + code_lines += [ + f"_KEYWORD_CLASSES = [{', '.join(sorted(set(self._keyword_classes)))}]" + ] + code_lines += [ + "def is_keyword_class(cls: type) -> bool:", + ' """Returns true if the class has a property that may be python keyword."""', + " return any(cls is c for c in _KEYWORD_CLASSES)", + "", + ] + + # These are classes that have properties that need special handling + # during serialization of the class based on LSP. + # See: https://github.com/microsoft/vscode-languageserver-node/issues/967 + code_lines += [ + f"_SPECIAL_CLASSES = [{', '.join(sorted(set(self._special_classes)))}]" + ] + code_lines += [ + "def is_special_class(cls: type) -> bool:", + ' """Returns true if the class or its properties require special handling."""', + " return any(cls is c for c in _SPECIAL_CLASSES)", + "", + ] + + # This is a collection of `class_name.property` as string. These properties + # need special handling as described by LSP> + # See: https://github.com/microsoft/vscode-languageserver-node/issues/967 + # + # Example: + # Consider RenameRegistrationOptions + # * document_selector property: + # When you set `document_selector` to None in python it has to be preserved when + # serializing it. Since the serialized JSON value `{"document_selector": null}` + # means use the Clients document selector. Omitting it might throw error. + # * prepare_provider property + # This property does NOT need special handling, since omitting it or using + # `{"prepare_provider": null}` has the same meaning. + code_lines += [ + f"_SPECIAL_PROPERTIES = [{', '.join(sorted(set(self._special_properties)))}]" + ] + code_lines += [ + "def is_special_property(cls: type, property_name:str) -> bool:", + ' """Returns true if the class or its properties require special handling.', + " Example:", + " Consider RenameRegistrationOptions", + " * document_selector property:", + " When you set `document_selector` to None in python it has to be preserved when", + ' serializing it. Since the serialized JSON value `{"document_selector": null}`', + " means use the Clients document selector. Omitting it might throw error. ", + " * prepare_provider property", + " This property does NOT need special handling, since omitting it or using", + ' `{"prepare_provider": null}` in JSON has the same meaning.', + ' """', + ' qualified_name = f"{cls.__name__}.{property_name}"', + " return qualified_name in _SPECIAL_PROPERTIES", + "", + ] + + code_lines += ["", "ALL_TYPES_MAP: Dict[str, Union[type, object]] = {"] + code_lines += sorted([f"'{name}': {name}," for name in set(self._types.keys())]) + code_lines += ["}", ""] + + code_lines += ["_MESSAGE_DIRECTION: Dict[str, str] = {"] + + code_lines += ["# Request methods"] + code_lines += sorted( + [ + f'{_snake_case_item_name(r.method).upper()}:"{r.messageDirection}",' + for r in lsp_model.requests + ] + ) + code_lines += ["# Notification methods"] + code_lines += sorted( + [ + f'{_snake_case_item_name(n.method).upper()}:"{n.messageDirection}",' + for n in lsp_model.notifications + ] + ) + + code_lines += ["}", ""] + + code_lines += [ + "def message_direction(method:str) -> str:", + ' """Returns message direction clientToServer, serverToClient or both."""', + " return _MESSAGE_DIRECTION[method]", + "", + ] + + return code_lines + + def _get_meta_data(self, lsp_model: model.LSPModel) -> List[str]: + return [f"__lsp_version__ = '{lsp_model.metaData.version}'"] |