Ben Murdoch | 7757ec2 | 2013-07-23 11:17:36 +0100 | [diff] [blame] | 1 | # Copyright (C) 2013 Google Inc. All rights reserved. |
| 2 | # |
| 3 | # Redistribution and use in source and binary forms, with or without |
| 4 | # modification, are permitted provided that the following conditions are |
| 5 | # met: |
| 6 | # |
| 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 |
| 12 | # distribution. |
| 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. |
| 16 | # |
| 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. |
| 28 | |
| 29 | """Validate extended attributes.""" |
| 30 | |
| 31 | |
| 32 | import re |
| 33 | |
| 34 | |
| 35 | class IDLExtendedAttributeFileFormatError(Exception): |
| 36 | pass |
| 37 | |
| 38 | |
| 39 | class IDLInvalidExtendedAttributeError(Exception): |
| 40 | pass |
| 41 | |
| 42 | |
| 43 | def validate_extended_attributes(definitions, basename, idl_attributes_filename): |
| 44 | extended_attribute_validator = IDLExtendedAttributeValidator(idl_attributes_filename) |
| 45 | extended_attribute_validator.validate_extended_attributes(definitions, basename) |
| 46 | |
| 47 | |
| 48 | def read_extended_attributes_file(extended_attributes_filename): |
| 49 | valid_extended_attributes = {} |
| 50 | with open(extended_attributes_filename) as extended_attributes_file: |
| 51 | for line in extended_attributes_file: |
| 52 | line = line.strip() |
| 53 | if not line or line.startswith('#'): |
| 54 | continue |
| 55 | name, _, values_string = map(str.strip, line.partition('=')) |
| 56 | if not name: |
| 57 | raise IDLExtendedAttributeFileFormatError('The format of %s is wrong, in line "%s"' % (extended_attributes_filename, line)) |
| 58 | valid_extended_attributes[name] = set() |
| 59 | value_list = values_string.split('|') |
| 60 | if not value_list: |
| 61 | valid_extended_attributes[name].add(None) |
| 62 | continue |
| 63 | for value in value_list: |
| 64 | value = value.strip() |
| 65 | if not value: |
| 66 | value = None |
| 67 | valid_extended_attributes[name].add(value) |
| 68 | return valid_extended_attributes |
| 69 | |
| 70 | |
| 71 | class IDLExtendedAttributeValidator: |
| 72 | def __init__(self, extended_attributes_filename): |
| 73 | self.valid_extended_attributes = read_extended_attributes_file(extended_attributes_filename) |
| 74 | |
| 75 | def validate_extended_attributes(self, definitions, idl_filename): |
| 76 | # FIXME: this should be done when parsing the file, rather than after. |
| 77 | try: |
| 78 | for interface in definitions.interfaces.itervalues(): |
| 79 | self.validate_extended_attributes_node(interface) |
| 80 | for attribute in interface.attributes: |
| 81 | self.validate_extended_attributes_node(attribute) |
| 82 | for operation in interface.operations: |
| 83 | self.validate_extended_attributes_node(operation) |
| 84 | for argument in operation.arguments: |
| 85 | self.validate_extended_attributes_node(argument) |
| 86 | except IDLInvalidExtendedAttributeError, error: |
| 87 | raise IDLInvalidExtendedAttributeError("""IDL ATTRIBUTE ERROR in file %s: |
| 88 | %s |
| 89 | If you want to add a new IDL extended attribute, please add it to bindings/scripts/IDLAttributes.txt and add an explanation to the Blink IDL document at http://chromium.org/blink/webidl |
| 90 | """ % (idl_filename, str(error))) |
| 91 | |
| 92 | def validate_extended_attributes_node(self, node): |
| 93 | for name, values_string in node.extended_attributes.iteritems(): |
| 94 | self.validate_name_values_string(name, values_string) |
| 95 | |
| 96 | def validate_name_values_string(self, name, values_string): |
| 97 | if name == 'ImplementedBy': # attribute added when merging interfaces |
| 98 | return |
| 99 | if name not in self.valid_extended_attributes: |
| 100 | raise IDLInvalidExtendedAttributeError('Unknown extended attribute [%s]' % name) |
| 101 | valid_values = self.valid_extended_attributes[name] |
| 102 | if '*' in valid_values: # wildcard, any value ok |
| 103 | return |
| 104 | if values_string is None: |
| 105 | value_list = [None] |
| 106 | else: |
| 107 | value_list = re.split('[|&]', values_string) |
| 108 | for value in value_list: |
| 109 | if value not in valid_values: |
| 110 | raise IDLInvalidExtendedAttributeError('Invalid value "%s" found in extended attribute [%s=%s]' % (value, name, values_string)) |