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# 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 os.path
import sys
# 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 not in sys.path:
sys.path.insert(0, idl_generators_path)
import idl_parser
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):
self.node = callspec_node
def process(self, refs):
parameters = []
for node in self.node.children:
parameters.append(Param(node).process(refs))
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, refs):
return Typeref(self.node.GetProperty( 'TYPEREF'),
self.node,
{ 'name': self.node.GetName() }).process(refs)
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, refs):
properties = {}
for node in self.node.children:
if node.cls == 'Member':
k, v = Member(node).process(refs)
properties[k] = v
return { 'id': self.node.GetName(),
'properties': properties,
'type': 'object' }
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, refs):
properties = {}
name = self.node.GetName()
if self.node.GetProperty('OPTIONAL'):
properties['optional'] = True
if self.node.GetProperty('nodoc'):
properties['nodoc'] = True
is_function = False
for node in self.node.children:
if node.cls == 'Callspec':
is_function = True
name, parameters = Callspec(node).process(refs)
properties['parameters'] = parameters
properties['name'] = name
if is_function:
properties['type'] = 'function'
else:
properties = Typeref(self.node.GetProperty('TYPEREF'),
self.node, properties).process(refs)
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, refs):
properties = self.additional_properties
if self.parent.GetProperty('OPTIONAL', False):
properties['optional'] = True
if self.typeref == 'DOMString':
properties['type'] = 'string'
elif self.typeref == 'boolean':
properties['type'] = 'boolean'
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 is None:
properties['type'] = 'function'
else:
try:
properties = refs[self.typeref]
except KeyError, e:
properties['$ref'] = self.typeref
return properties
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):
self.namespace = namespace_node
self.nodoc = nodoc
self.events = []
self.functions = []
self.types = []
self.refs = {}
def process(self):
for node in self.namespace.children:
cls = node.cls
if cls == "Dictionary":
self.types.append(Dictionary(node).process(self.refs))
elif cls == "Callback":
k, v = Member(node).process(self.refs)
self.refs[k] = v
elif cls == "Interface" and node.GetName() == "Functions":
self.functions = self.process_interface(node)
elif cls == "Interface" and node.GetName() == "Events":
self.events = self.process_interface(node)
else:
sys.exit("Did not process %s %s" % (node.cls, node))
return { 'events': self.events,
'functions': self.functions,
'types': self.types,
'namespace': self.namespace.GetName(),
'nodoc': self.nodoc }
def process_interface(self, node):
members = []
for member in node.children:
if member.cls == 'Member':
name, properties = Member(member).process(self.refs)
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 = []
for node in self.idl:
nodoc = False
cls = node.cls
if cls == 'Namespace':
namespace = Namespace(node, nodoc)
namespaces.append(namespace.process())
elif cls == 'Copyright':
continue
elif cls == 'Comment':
continue
elif cls == 'ExtAttribute':
if node.name == 'nodoc':
nodoc = bool(node.value)
else:
continue
else:
sys.exit("Did not process %s %s" % (node.cls, node))
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()
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