pygments.lexers.robotframework.py Maven / Gradle / Ivy
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# -*- coding: utf-8 -*-
"""
pygments.lexers.robotframework
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lexer for Robot Framework.
:copyright: Copyright 2006-2019 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
# Copyright 2012 Nokia Siemens Networks Oyj
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
from pygments.lexer import Lexer
from pygments.token import Token
__all__ = ['RobotFrameworkLexer']
HEADING = Token.Generic.Heading
SETTING = Token.Keyword.Namespace
IMPORT = Token.Name.Namespace
TC_KW_NAME = Token.Generic.Subheading
KEYWORD = Token.Name.Function
ARGUMENT = Token.String
VARIABLE = Token.Name.Variable
COMMENT = Token.Comment
SEPARATOR = Token.Punctuation
SYNTAX = Token.Punctuation
GHERKIN = Token.Generic.Emph
ERROR = Token.Error
def normalize(string, remove=''):
string = string.lower()
for char in remove + ' ':
if char in string:
string = string.replace(char, '')
return string
class RobotFrameworkLexer(Lexer):
"""
For `Robot Framework `_ test data.
Supports both space and pipe separated plain text formats.
.. versionadded:: 1.6
"""
name = 'RobotFramework'
aliases = ['robotframework']
filenames = ['*.robot']
mimetypes = ['text/x-robotframework']
def __init__(self, **options):
options['tabsize'] = 2
options['encoding'] = 'UTF-8'
Lexer.__init__(self, **options)
def get_tokens_unprocessed(self, text):
row_tokenizer = RowTokenizer()
var_tokenizer = VariableTokenizer()
index = 0
for row in text.splitlines():
for value, token in row_tokenizer.tokenize(row):
for value, token in var_tokenizer.tokenize(value, token):
if value:
yield index, token, str(value)
index += len(value)
class VariableTokenizer:
def tokenize(self, string, token):
var = VariableSplitter(string, identifiers='$@%&')
if var.start < 0 or token in (COMMENT, ERROR):
yield string, token
return
for value, token in self._tokenize(var, string, token):
if value:
yield value, token
def _tokenize(self, var, string, orig_token):
before = string[:var.start]
yield before, orig_token
yield var.identifier + '{', SYNTAX
for value, token in self.tokenize(var.base, VARIABLE):
yield value, token
yield '}', SYNTAX
if var.index:
yield '[', SYNTAX
for value, token in self.tokenize(var.index, VARIABLE):
yield value, token
yield ']', SYNTAX
for value, token in self.tokenize(string[var.end:], orig_token):
yield value, token
class RowTokenizer:
def __init__(self):
self._table = UnknownTable()
self._splitter = RowSplitter()
testcases = TestCaseTable()
settings = SettingTable(testcases.set_default_template)
variables = VariableTable()
keywords = KeywordTable()
self._tables = {'settings': settings, 'setting': settings,
'metadata': settings,
'variables': variables, 'variable': variables,
'testcases': testcases, 'testcase': testcases,
'keywords': keywords, 'keyword': keywords,
'userkeywords': keywords, 'userkeyword': keywords}
def tokenize(self, row):
commented = False
heading = False
for index, value in enumerate(self._splitter.split(row)):
# First value, and every second after that, is a separator.
index, separator = divmod(index-1, 2)
if value.startswith('#'):
commented = True
elif index == 0 and value.startswith('*'):
self._table = self._start_table(value)
heading = True
for value, token in self._tokenize(value, index, commented,
separator, heading):
yield value, token
self._table.end_row()
def _start_table(self, header):
name = normalize(header, remove='*')
return self._tables.get(name, UnknownTable())
def _tokenize(self, value, index, commented, separator, heading):
if commented:
yield value, COMMENT
elif separator:
yield value, SEPARATOR
elif heading:
yield value, HEADING
else:
for value, token in self._table.tokenize(value, index):
yield value, token
class RowSplitter:
_space_splitter = re.compile('( {2,})')
_pipe_splitter = re.compile(r'((?:^| +)\|(?: +|$))')
def split(self, row):
splitter = (row.startswith('| ') and self._split_from_pipes
or self._split_from_spaces)
for value in splitter(row):
yield value
yield '\n'
def _split_from_spaces(self, row):
yield '' # Start with (pseudo)separator similarly as with pipes
for value in self._space_splitter.split(row):
yield value
def _split_from_pipes(self, row):
_, separator, rest = self._pipe_splitter.split(row, 1)
yield separator
while self._pipe_splitter.search(rest):
cell, separator, rest = self._pipe_splitter.split(rest, 1)
yield cell
yield separator
yield rest
class Tokenizer:
_tokens = None
def __init__(self):
self._index = 0
def tokenize(self, value):
values_and_tokens = self._tokenize(value, self._index)
self._index += 1
if isinstance(values_and_tokens, type(Token)):
values_and_tokens = [(value, values_and_tokens)]
return values_and_tokens
def _tokenize(self, value, index):
index = min(index, len(self._tokens) - 1)
return self._tokens[index]
def _is_assign(self, value):
if value.endswith('='):
value = value[:-1].strip()
var = VariableSplitter(value, identifiers='$@&')
return var.start == 0 and var.end == len(value)
class Comment(Tokenizer):
_tokens = (COMMENT,)
class Setting(Tokenizer):
_tokens = (SETTING, ARGUMENT)
_keyword_settings = ('suitesetup', 'suiteprecondition', 'suiteteardown',
'suitepostcondition', 'testsetup', 'testprecondition',
'testteardown', 'testpostcondition', 'testtemplate')
_import_settings = ('library', 'resource', 'variables')
_other_settings = ('documentation', 'metadata', 'forcetags', 'defaulttags',
'testtimeout')
_custom_tokenizer = None
def __init__(self, template_setter=None):
Tokenizer.__init__(self)
self._template_setter = template_setter
def _tokenize(self, value, index):
if index == 1 and self._template_setter:
self._template_setter(value)
if index == 0:
normalized = normalize(value)
if normalized in self._keyword_settings:
self._custom_tokenizer = KeywordCall(support_assign=False)
elif normalized in self._import_settings:
self._custom_tokenizer = ImportSetting()
elif normalized not in self._other_settings:
return ERROR
elif self._custom_tokenizer:
return self._custom_tokenizer.tokenize(value)
return Tokenizer._tokenize(self, value, index)
class ImportSetting(Tokenizer):
_tokens = (IMPORT, ARGUMENT)
class TestCaseSetting(Setting):
_keyword_settings = ('setup', 'precondition', 'teardown', 'postcondition',
'template')
_import_settings = ()
_other_settings = ('documentation', 'tags', 'timeout')
def _tokenize(self, value, index):
if index == 0:
type = Setting._tokenize(self, value[1:-1], index)
return [('[', SYNTAX), (value[1:-1], type), (']', SYNTAX)]
return Setting._tokenize(self, value, index)
class KeywordSetting(TestCaseSetting):
_keyword_settings = ('teardown',)
_other_settings = ('documentation', 'arguments', 'return', 'timeout', 'tags')
class Variable(Tokenizer):
_tokens = (SYNTAX, ARGUMENT)
def _tokenize(self, value, index):
if index == 0 and not self._is_assign(value):
return ERROR
return Tokenizer._tokenize(self, value, index)
class KeywordCall(Tokenizer):
_tokens = (KEYWORD, ARGUMENT)
def __init__(self, support_assign=True):
Tokenizer.__init__(self)
self._keyword_found = not support_assign
self._assigns = 0
def _tokenize(self, value, index):
if not self._keyword_found and self._is_assign(value):
self._assigns += 1
return SYNTAX # VariableTokenizer tokenizes this later.
if self._keyword_found:
return Tokenizer._tokenize(self, value, index - self._assigns)
self._keyword_found = True
return GherkinTokenizer().tokenize(value, KEYWORD)
class GherkinTokenizer:
_gherkin_prefix = re.compile('^(Given|When|Then|And) ', re.IGNORECASE)
def tokenize(self, value, token):
match = self._gherkin_prefix.match(value)
if not match:
return [(value, token)]
end = match.end()
return [(value[:end], GHERKIN), (value[end:], token)]
class TemplatedKeywordCall(Tokenizer):
_tokens = (ARGUMENT,)
class ForLoop(Tokenizer):
def __init__(self):
Tokenizer.__init__(self)
self._in_arguments = False
def _tokenize(self, value, index):
token = self._in_arguments and ARGUMENT or SYNTAX
if value.upper() in ('IN', 'IN RANGE'):
self._in_arguments = True
return token
class _Table:
_tokenizer_class = None
def __init__(self, prev_tokenizer=None):
self._tokenizer = self._tokenizer_class()
self._prev_tokenizer = prev_tokenizer
self._prev_values_on_row = []
def tokenize(self, value, index):
if self._continues(value, index):
self._tokenizer = self._prev_tokenizer
yield value, SYNTAX
else:
for value_and_token in self._tokenize(value, index):
yield value_and_token
self._prev_values_on_row.append(value)
def _continues(self, value, index):
return value == '...' and all(self._is_empty(t)
for t in self._prev_values_on_row)
def _is_empty(self, value):
return value in ('', '\\')
def _tokenize(self, value, index):
return self._tokenizer.tokenize(value)
def end_row(self):
self.__init__(prev_tokenizer=self._tokenizer)
class UnknownTable(_Table):
_tokenizer_class = Comment
def _continues(self, value, index):
return False
class VariableTable(_Table):
_tokenizer_class = Variable
class SettingTable(_Table):
_tokenizer_class = Setting
def __init__(self, template_setter, prev_tokenizer=None):
_Table.__init__(self, prev_tokenizer)
self._template_setter = template_setter
def _tokenize(self, value, index):
if index == 0 and normalize(value) == 'testtemplate':
self._tokenizer = Setting(self._template_setter)
return _Table._tokenize(self, value, index)
def end_row(self):
self.__init__(self._template_setter, prev_tokenizer=self._tokenizer)
class TestCaseTable(_Table):
_setting_class = TestCaseSetting
_test_template = None
_default_template = None
@property
def _tokenizer_class(self):
if self._test_template or (self._default_template and
self._test_template is not False):
return TemplatedKeywordCall
return KeywordCall
def _continues(self, value, index):
return index > 0 and _Table._continues(self, value, index)
def _tokenize(self, value, index):
if index == 0:
if value:
self._test_template = None
return GherkinTokenizer().tokenize(value, TC_KW_NAME)
if index == 1 and self._is_setting(value):
if self._is_template(value):
self._test_template = False
self._tokenizer = self._setting_class(self.set_test_template)
else:
self._tokenizer = self._setting_class()
if index == 1 and self._is_for_loop(value):
self._tokenizer = ForLoop()
if index == 1 and self._is_empty(value):
return [(value, SYNTAX)]
return _Table._tokenize(self, value, index)
def _is_setting(self, value):
return value.startswith('[') and value.endswith(']')
def _is_template(self, value):
return normalize(value) == '[template]'
def _is_for_loop(self, value):
return value.startswith(':') and normalize(value, remove=':') == 'for'
def set_test_template(self, template):
self._test_template = self._is_template_set(template)
def set_default_template(self, template):
self._default_template = self._is_template_set(template)
def _is_template_set(self, template):
return normalize(template) not in ('', '\\', 'none', '${empty}')
class KeywordTable(TestCaseTable):
_tokenizer_class = KeywordCall
_setting_class = KeywordSetting
def _is_template(self, value):
return False
# Following code copied directly from Robot Framework 2.7.5.
class VariableSplitter:
def __init__(self, string, identifiers):
self.identifier = None
self.base = None
self.index = None
self.start = -1
self.end = -1
self._identifiers = identifiers
self._may_have_internal_variables = False
try:
self._split(string)
except ValueError:
pass
else:
self._finalize()
def get_replaced_base(self, variables):
if self._may_have_internal_variables:
return variables.replace_string(self.base)
return self.base
def _finalize(self):
self.identifier = self._variable_chars[0]
self.base = ''.join(self._variable_chars[2:-1])
self.end = self.start + len(self._variable_chars)
if self._has_list_or_dict_variable_index():
self.index = ''.join(self._list_and_dict_variable_index_chars[1:-1])
self.end += len(self._list_and_dict_variable_index_chars)
def _has_list_or_dict_variable_index(self):
return self._list_and_dict_variable_index_chars\
and self._list_and_dict_variable_index_chars[-1] == ']'
def _split(self, string):
start_index, max_index = self._find_variable(string)
self.start = start_index
self._open_curly = 1
self._state = self._variable_state
self._variable_chars = [string[start_index], '{']
self._list_and_dict_variable_index_chars = []
self._string = string
start_index += 2
for index, char in enumerate(string[start_index:]):
index += start_index # Giving start to enumerate only in Py 2.6+
try:
self._state(char, index)
except StopIteration:
return
if index == max_index and not self._scanning_list_variable_index():
return
def _scanning_list_variable_index(self):
return self._state in [self._waiting_list_variable_index_state,
self._list_variable_index_state]
def _find_variable(self, string):
max_end_index = string.rfind('}')
if max_end_index == -1:
raise ValueError('No variable end found')
if self._is_escaped(string, max_end_index):
return self._find_variable(string[:max_end_index])
start_index = self._find_start_index(string, 1, max_end_index)
if start_index == -1:
raise ValueError('No variable start found')
return start_index, max_end_index
def _find_start_index(self, string, start, end):
index = string.find('{', start, end) - 1
if index < 0:
return -1
if self._start_index_is_ok(string, index):
return index
return self._find_start_index(string, index+2, end)
def _start_index_is_ok(self, string, index):
return string[index] in self._identifiers\
and not self._is_escaped(string, index)
def _is_escaped(self, string, index):
escaped = False
while index > 0 and string[index-1] == '\\':
index -= 1
escaped = not escaped
return escaped
def _variable_state(self, char, index):
self._variable_chars.append(char)
if char == '}' and not self._is_escaped(self._string, index):
self._open_curly -= 1
if self._open_curly == 0:
if not self._is_list_or_dict_variable():
raise StopIteration
self._state = self._waiting_list_variable_index_state
elif char in self._identifiers:
self._state = self._internal_variable_start_state
def _is_list_or_dict_variable(self):
return self._variable_chars[0] in ('@','&')
def _internal_variable_start_state(self, char, index):
self._state = self._variable_state
if char == '{':
self._variable_chars.append(char)
self._open_curly += 1
self._may_have_internal_variables = True
else:
self._variable_state(char, index)
def _waiting_list_variable_index_state(self, char, index):
if char != '[':
raise StopIteration
self._list_and_dict_variable_index_chars.append(char)
self._state = self._list_variable_index_state
def _list_variable_index_state(self, char, index):
self._list_and_dict_variable_index_chars.append(char)
if char == ']':
raise StopIteration