| #! /usr/bin/env python |
| # Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import itertools |
| import json |
| import os.path |
| import re |
| import sys |
| |
| import schema_util |
| |
| # This file is a peer to json_schema.py. Each of these files understands a |
| # certain format describing APIs (either JSON or IDL), reads files written |
| # in that format into memory, and emits them as a Python array of objects |
| # corresponding to those APIs, where the objects are formatted in a way that |
| # the JSON schema compiler understands. compiler.py drives both idl_schema.py |
| # and json_schema.py. |
| |
| # idl_parser expects to be able to import certain files in its directory, |
| # so let's set things up the way it wants. |
| _idl_generators_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), |
| os.pardir, os.pardir, 'ppapi', 'generators') |
| if _idl_generators_path in sys.path: |
| import idl_parser |
| else: |
| sys.path.insert(0, _idl_generators_path) |
| try: |
| import idl_parser |
| finally: |
| sys.path.pop(0) |
| |
| def ProcessComment(comment): |
| ''' |
| Convert a comment into a parent comment and a list of parameter comments. |
| |
| Function comments are of the form: |
| Function documentation. May contain HTML and multiple lines. |
| |
| |arg1_name|: Description of arg1. Use <var>argument</var> to refer |
| to other arguments. |
| |arg2_name|: Description of arg2... |
| |
| Newlines are removed, and leading and trailing whitespace is stripped. |
| |
| Args: |
| comment: The string from a Comment node. |
| |
| Returns: A tuple that looks like: |
| ( |
| "The processed comment, minus all |parameter| mentions.", |
| { |
| 'parameter_name_1': "The comment that followed |parameter_name_1|:", |
| ... |
| } |
| ) |
| ''' |
| # Find all the parameter comments of the form '|name|: comment'. |
| parameter_starts = list(re.finditer(r'\n *\|([^|]*)\| *: *', comment)) |
| |
| # Get the parent comment (everything before the first parameter comment. |
| first_parameter_location = (parameter_starts[0].start() |
| if parameter_starts else len(comment)) |
| parent_comment = comment[:first_parameter_location] |
| |
| # We replace \n\n with <br/><br/> here and below, because the documentation |
| # needs to know where the newlines should be, and this is easier than |
| # escaping \n. |
| parent_comment = (parent_comment.strip().replace('\n\n', '<br/><br/>') |
| .replace('\n', '')) |
| |
| params = {} |
| for (cur_param, next_param) in itertools.izip_longest(parameter_starts, |
| parameter_starts[1:]): |
| param_name = cur_param.group(1) |
| |
| # A parameter's comment goes from the end of its introduction to the |
| # beginning of the next parameter's introduction. |
| param_comment_start = cur_param.end() |
| param_comment_end = next_param.start() if next_param else len(comment) |
| params[param_name] = (comment[param_comment_start:param_comment_end |
| ].strip().replace('\n\n', '<br/><br/>') |
| .replace('\n', '')) |
| return (parent_comment, params) |
| |
| class Callspec(object): |
| ''' |
| Given a Callspec node representing an IDL function declaration, converts into |
| a name/value pair where the value is a list of function parameters. |
| ''' |
| def __init__(self, callspec_node, comment): |
| self.node = callspec_node |
| self.comment = comment |
| |
| def process(self, callbacks): |
| parameters = [] |
| for node in self.node.children: |
| parameter = Param(node).process(callbacks) |
| if parameter['name'] in self.comment: |
| parameter['description'] = self.comment[parameter['name']] |
| parameters.append(parameter) |
| return self.node.GetName(), parameters |
| |
| class Param(object): |
| ''' |
| Given a Param node representing a function parameter, converts into a Python |
| dictionary that the JSON schema compiler expects to see. |
| ''' |
| def __init__(self, param_node): |
| self.node = param_node |
| |
| def process(self, callbacks): |
| return Typeref(self.node.GetProperty('TYPEREF'), |
| self.node, |
| {'name': self.node.GetName()}).process(callbacks) |
| |
| class Dictionary(object): |
| ''' |
| Given an IDL Dictionary node, converts into a Python dictionary that the JSON |
| schema compiler expects to see. |
| ''' |
| def __init__(self, dictionary_node): |
| self.node = dictionary_node |
| |
| def process(self, callbacks): |
| properties = {} |
| for node in self.node.children: |
| if node.cls == 'Member': |
| k, v = Member(node).process(callbacks) |
| properties[k] = v |
| result = {'id': self.node.GetName(), |
| 'properties': properties, |
| 'type': 'object'} |
| if self.node.GetProperty('inline_doc'): |
| result['inline_doc'] = True |
| return result |
| |
| |
| class Member(object): |
| ''' |
| Given an IDL dictionary or interface member, converts into a name/value pair |
| where the value is a Python dictionary that the JSON schema compiler expects |
| to see. |
| ''' |
| def __init__(self, member_node): |
| self.node = member_node |
| |
| def process(self, callbacks): |
| properties = {} |
| name = self.node.GetName() |
| for property_name in ('OPTIONAL', 'nodoc', 'nocompile'): |
| if self.node.GetProperty(property_name): |
| properties[property_name.lower()] = True |
| is_function = False |
| parameter_comments = {} |
| for node in self.node.children: |
| if node.cls == 'Comment': |
| (parent_comment, parameter_comments) = ProcessComment(node.GetName()) |
| properties['description'] = parent_comment |
| elif node.cls == 'Callspec': |
| is_function = True |
| name, parameters = Callspec(node, parameter_comments).process(callbacks) |
| properties['parameters'] = parameters |
| properties['name'] = name |
| if is_function: |
| properties['type'] = 'function' |
| else: |
| properties = Typeref(self.node.GetProperty('TYPEREF'), |
| self.node, properties).process(callbacks) |
| enum_values = self.node.GetProperty('legalValues') |
| if enum_values: |
| if properties['type'] == 'integer': |
| enum_values = map(int, enum_values) |
| elif properties['type'] == 'double': |
| enum_values = map(float, enum_values) |
| properties['enum'] = enum_values |
| return name, properties |
| |
| class Typeref(object): |
| ''' |
| Given a TYPEREF property representing the type of dictionary member or |
| function parameter, converts into a Python dictionary that the JSON schema |
| compiler expects to see. |
| ''' |
| def __init__(self, typeref, parent, additional_properties={}): |
| self.typeref = typeref |
| self.parent = parent |
| self.additional_properties = additional_properties |
| |
| def process(self, callbacks): |
| properties = self.additional_properties |
| result = properties |
| |
| if self.parent.GetProperty('OPTIONAL', False): |
| properties['optional'] = True |
| |
| # The IDL parser denotes array types by adding a child 'Array' node onto |
| # the Param node in the Callspec. |
| for sibling in self.parent.GetChildren(): |
| if sibling.cls == 'Array' and sibling.GetName() == self.parent.GetName(): |
| properties['type'] = 'array' |
| properties['items'] = {} |
| properties = properties['items'] |
| break |
| |
| if self.typeref == 'DOMString': |
| properties['type'] = 'string' |
| elif self.typeref == 'boolean': |
| properties['type'] = 'boolean' |
| elif self.typeref == 'double': |
| properties['type'] = 'number' |
| elif self.typeref == 'long': |
| properties['type'] = 'integer' |
| elif self.typeref == 'any': |
| properties['type'] = 'any' |
| elif self.typeref == 'object': |
| properties['type'] = 'object' |
| if 'additionalProperties' not in properties: |
| properties['additionalProperties'] = {} |
| properties['additionalProperties']['type'] = 'any' |
| instance_of = self.parent.GetProperty('instanceOf') |
| if instance_of: |
| properties['isInstanceOf'] = instance_of |
| elif self.typeref == 'ArrayBuffer': |
| properties['type'] = 'binary' |
| properties['isInstanceOf'] = 'ArrayBuffer' |
| elif self.typeref is None: |
| properties['type'] = 'function' |
| else: |
| if self.typeref in callbacks: |
| properties.update(callbacks[self.typeref]) |
| else: |
| properties['$ref'] = self.typeref |
| |
| return result |
| |
| |
| class Enum(object): |
| ''' |
| Given an IDL Enum node, converts into a Python dictionary that the JSON |
| schema compiler expects to see. |
| ''' |
| def __init__(self, enum_node): |
| self.node = enum_node |
| self.description = '' |
| |
| def process(self, callbacks): |
| enum = [] |
| for node in self.node.children: |
| if node.cls == 'EnumItem': |
| enum.append(node.GetName()) |
| elif node.cls == 'Comment': |
| self.description = ProcessComment(node.GetName())[0] |
| else: |
| sys.exit('Did not process %s %s' % (node.cls, node)) |
| result = {'id' : self.node.GetName(), |
| 'description': self.description, |
| 'type': 'string', |
| 'enum': enum} |
| if self.node.GetProperty('inline_doc'): |
| result['inline_doc'] = True |
| return result |
| |
| |
| class Namespace(object): |
| ''' |
| Given an IDLNode representing an IDL namespace, converts into a Python |
| dictionary that the JSON schema compiler expects to see. |
| ''' |
| |
| def __init__(self, namespace_node, nodoc=False, permissions=None, |
| internal=False): |
| self.namespace = namespace_node |
| self.nodoc = nodoc |
| self.internal = internal |
| self.events = [] |
| self.functions = [] |
| self.types = [] |
| self.callbacks = {} |
| self.permissions = permissions or [] |
| |
| def process(self): |
| for node in self.namespace.children: |
| if node.cls == 'Dictionary': |
| self.types.append(Dictionary(node).process(self.callbacks)) |
| elif node.cls == 'Callback': |
| k, v = Member(node).process(self.callbacks) |
| self.callbacks[k] = v |
| elif node.cls == 'Interface' and node.GetName() == 'Functions': |
| self.functions = self.process_interface(node) |
| elif node.cls == 'Interface' and node.GetName() == 'Events': |
| self.events = self.process_interface(node) |
| elif node.cls == 'Enum': |
| self.types.append(Enum(node).process(self.callbacks)) |
| else: |
| sys.exit('Did not process %s %s' % (node.cls, node)) |
| return {'namespace': self.namespace.GetName(), |
| 'nodoc': self.nodoc, |
| 'documentation_permissions_required': self.permissions, |
| 'types': self.types, |
| 'functions': self.functions, |
| 'internal': self.internal, |
| 'events': self.events} |
| |
| def process_interface(self, node): |
| members = [] |
| for member in node.children: |
| if member.cls == 'Member': |
| name, properties = Member(member).process(self.callbacks) |
| members.append(properties) |
| return members |
| |
| class IDLSchema(object): |
| ''' |
| Given a list of IDLNodes and IDLAttributes, converts into a Python list |
| of api_defs that the JSON schema compiler expects to see. |
| ''' |
| |
| def __init__(self, idl): |
| self.idl = idl |
| |
| def process(self): |
| namespaces = [] |
| nodoc = False |
| internal = False |
| permissions = None |
| for node in self.idl: |
| if node.cls == 'Namespace': |
| namespace = Namespace(node, nodoc, permissions, internal) |
| namespaces.append(namespace.process()) |
| nodoc = False |
| internal = False |
| elif node.cls == 'Copyright': |
| continue |
| elif node.cls == 'Comment': |
| continue |
| elif node.cls == 'ExtAttribute': |
| if node.name == 'nodoc': |
| nodoc = bool(node.value) |
| elif node.name == 'permissions': |
| permission = node.value.split(',') |
| elif node.name == 'internal': |
| internal = bool(node.value) |
| else: |
| continue |
| else: |
| sys.exit('Did not process %s %s' % (node.cls, node)) |
| schema_util.PrefixSchemasWithNamespace(namespaces) |
| return namespaces |
| |
| def Load(filename): |
| ''' |
| Given the filename of an IDL file, parses it and returns an equivalent |
| Python dictionary in a format that the JSON schema compiler expects to see. |
| ''' |
| |
| f = open(filename, 'r') |
| contents = f.read() |
| f.close() |
| |
| idl = idl_parser.IDLParser().ParseData(contents, filename) |
| idl_schema = IDLSchema(idl) |
| return idl_schema.process() |
| |
| def Main(): |
| ''' |
| Dump a json serialization of parse result for the IDL files whose names |
| were passed in on the command line. |
| ''' |
| for filename in sys.argv[1:]: |
| schema = Load(filename) |
| print json.dumps(schema, indent=2) |
| |
| if __name__ == '__main__': |
| Main() |