1 # Copyright (C) 2013 Google Inc. All rights reserved.
3 # Redistribution and use in source and binary forms, with or without
4 # modification, are permitted provided that the following conditions are
7 # * Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 # * Redistributions in binary form must reproduce the above
10 # copyright notice, this list of conditions and the following disclaimer
11 # in the documentation and/or other materials provided with the
13 # * Neither the name of Google Inc. nor the names of its
14 # contributors may be used to endorse or promote products derived from
15 # this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 """Read an IDL file or complete IDL interface, producing an IdlDefinitions object.
32 http://www.chromium.org/developers/design-documents/idl-compiler#TOC-Front-end
37 import blink_idl_parser
38 from blink_idl_parser import BlinkIDLParser
39 from idl_definitions import IdlDefinitions
40 from idl_validator import EXTENDED_ATTRIBUTES_RELATIVE_PATH, IDLInvalidExtendedAttributeError, IDLExtendedAttributeValidator
41 from interface_dependency_resolver import InterfaceDependencyResolver
42 from utilities import idl_filename_to_component
45 class IdlReader(object):
46 def __init__(self, interfaces_info=None, outputdir=''):
47 self.extended_attribute_validator = IDLExtendedAttributeValidator()
48 self.interfaces_info = interfaces_info
51 self.interface_dependency_resolver = InterfaceDependencyResolver(interfaces_info, self)
53 self.interface_dependency_resolver = None
55 self.parser = BlinkIDLParser(outputdir=outputdir)
57 def read_idl_definitions(self, idl_filename):
58 """Returns a dictionary whose key is component and value is an IdlDefinitions object for an IDL file, including all dependencies."""
59 definitions = self.read_idl_file(idl_filename)
60 component = idl_filename_to_component(idl_filename)
62 if not self.interface_dependency_resolver:
63 return {component: definitions}
65 # This definitions should have a dictionary. No need to resolve any
67 if not definitions.interfaces:
68 return {component: definitions}
70 return self.interface_dependency_resolver.resolve_dependencies(definitions, component)
72 def read_idl_file(self, idl_filename):
73 """Returns an IdlDefinitions object for an IDL file, without any dependencies.
75 The IdlDefinitions object is guaranteed to contain a single
76 IdlInterface; it may also contain other definitions, such as
77 callback functions and enumerations."""
78 ast = blink_idl_parser.parse_file(self.parser, idl_filename)
80 raise Exception('Failed to parse %s' % idl_filename)
81 idl_file_basename, _ = os.path.splitext(os.path.basename(idl_filename))
82 definitions = IdlDefinitions(idl_file_basename, ast)
84 # Validate file contents with filename convention
85 # The Blink IDL filenaming convention is that the file
86 # <definition_name>.idl MUST contain exactly 1 definition
87 # (interface, dictionary or exception), and the definition name must
88 # agree with the file's basename, unless it is a partial definition.
89 # (e.g., 'partial interface Foo' can be in FooBar.idl).
90 targets = (definitions.interfaces.values() +
91 definitions.dictionaries.values())
92 number_of_targets = len(targets)
93 if number_of_targets != 1:
95 'Expected exactly 1 definition in file {0}, but found {1}'
96 .format(idl_filename, number_of_targets))
98 if not target.is_partial and target.name != idl_file_basename:
100 'Definition name "{0}" disagrees with IDL file basename "{1}".'
101 .format(target.name, idl_file_basename))
103 # Validate extended attributes
104 if not self.extended_attribute_validator:
108 self.extended_attribute_validator.validate_extended_attributes(definitions)
109 except IDLInvalidExtendedAttributeError as error:
110 raise IDLInvalidExtendedAttributeError("""
111 IDL ATTRIBUTE ERROR in file:
114 If you want to add a new IDL extended attribute, please add it to:
116 and add an explanation to the Blink IDL documentation at:
117 http://www.chromium.org/blink/webidl/blink-idl-extended-attributes
118 """ % (idl_filename, str(error), EXTENDED_ATTRIBUTES_RELATIVE_PATH))