def is_move_only_kind(kind):
if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind):
return True
if mojom.IsArrayKind(kind):
return is_move_only_kind(kind.kind)
if mojom.IsMapKind(kind):
return (is_move_only_kind(kind.value_kind) or
is_move_only_kind(kind.key_kind))
if mojom.IsAnyHandleOrInterfaceKind(kind):
return True
return False
def IsMoveOnlyKind(kind):
if IsTypemappedKind(kind):
if mojom.IsEnumKind(kind):
return False
return _current_typemap[GetFullMojomNameForKind(kind)]["move_only"]
if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind):
return True
if mojom.IsArrayKind(kind):
return IsMoveOnlyKind(kind.kind)
if mojom.IsMapKind(kind):
return IsMoveOnlyKind(kind.value_kind)
if mojom.IsAnyHandleOrInterfaceKind(kind):
return True
return False
def _IsMoveOnlyKind(self, kind):
if self._IsTypemappedKind(kind):
if mojom.IsEnumKind(kind):
return False
return self.typemap[self._GetFullMojomNameForKind(kind)]["move_only"]
if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind):
return True
if mojom.IsArrayKind(kind):
return self._IsMoveOnlyKind(kind.kind)
if mojom.IsMapKind(kind):
return (self._IsMoveOnlyKind(kind.value_kind) or
self._IsMoveOnlyKind(kind.key_kind))
if mojom.IsAnyHandleOrInterfaceKind(kind):
return True
return False
def _WriteInputParamForTracingImpl(generator, kind, cpp_parameter_name,
output_context):
"""Generates lines of C++ to log a parameter into TracedValue
|output_context.value|. Use |output_context.name| if |output_context| is of
inhereted type from _OutputContext.
Args:
kind: {Kind} The kind of the parameter (corresponds to its C++ type).
cpp_parameter_name: {string} The actual C++ variable name corresponding to
the mojom parameter |parameter_name|. Can be a valid C++ expression
(e.g., dereferenced variable |"(*var)"|).
output_context: {_OutputContext} Represents the TracedValue* variable to be
written into. Possibly also holds the mojo parameter name corresponding to
|cpp_parameter_name|.
Yields:
{string} C++ lines of code that trace a |cpp_parameter_name| into
|output_context.value|.
"""
def _WrapIfNullable(inner_lines):
"""Check if kind is nullable if so yield code to check whether it has
value.
Args:
inner_lines: {function} Function taking single argument and returning
iterable. If kind is nullable, yield from this method with
|cpp_parameter_name+'.value()'| otherwise yield with the parameter
|cpp_parameter_name|.
Args from the surrounding method:
kind
cpp_parameter_name
output_context.AddSingleValue
"""
if mojom.IsNullableKind(kind):
yield 'if (%s.has_value()) {' % cpp_parameter_name
for line in inner_lines(cpp_parameter_name + '.value()'):
yield ' ' + line
yield '} else {'
yield ' ' + output_context.AddSingleValue('String', '"base::nullopt"')
yield '}'
else:
# |yield from| is introduced in Python3.3.
for line in inner_lines(cpp_parameter_name):
yield line
# TODO(crbug.com/1103623): Support more involved types.
if mojom.IsEnumKind(kind):
if generator._IsTypemappedKind(kind) or IsNativeOnlyKind(kind):
yield output_context.AddSingleValue(
'Integer', 'static_cast<int>(%s)' % cpp_parameter_name)
else:
yield output_context.AddSingleValue(
'String', 'base::trace_event::ValueToString(%s)' % cpp_parameter_name)
return
if mojom.IsStringKind(kind):
if generator.for_blink:
# WTF::String is nullable on its own.
yield output_context.AddSingleValue('String',
'%s.Utf8()' % cpp_parameter_name)
return
# The type might be base::Optional<std::string> or std::string.
for line in _WrapIfNullable(lambda cpp_parameter_name: [
output_context.AddSingleValue('String', cpp_parameter_name)
]):
yield line
return
if kind == mojom.BOOL:
yield output_context.AddSingleValue('Boolean', cpp_parameter_name)
return
# TODO(crbug.com/1103623): Make TracedValue support int64_t, then move to
# mojom.IsIntegralKind.
if kind in [mojom.INT8, mojom.UINT8, mojom.INT16, mojom.UINT16, mojom.INT32]:
# Parameter is representable as 32bit int.
yield output_context.AddSingleValue('Integer', cpp_parameter_name)
return
if kind in [mojom.UINT32, mojom.INT64, mojom.UINT64]:
yield output_context.AddSingleValue(
'String', 'base::NumberToString(%s)' % cpp_parameter_name)
return
if mojom.IsFloatKind(kind) or mojom.IsDoubleKind(kind):
yield output_context.AddSingleValue('Double', cpp_parameter_name)
return
if (mojom.IsStructKind(kind) and not generator._IsTypemappedKind(kind)
and not IsNativeOnlyKind(kind)):
yield 'if (%s.is_null()) {' % cpp_parameter_name
yield ' ' + output_context.AddSingleValue('String', '"nullptr"')
yield '} else {'
yield ' ' + output_context.BeginContainer('Dictionary')
yield ' ' + output_context.AsValueInto(cpp_parameter_name)
yield ' ' + output_context.EndContainer('Dictionary')
yield '}'
return
if mojom.IsArrayKind(kind):
iterator_name = 'item'
loop_body = _WriteInputParamForTracingImpl(generator=generator,
kind=kind.kind,
cpp_parameter_name=iterator_name,
output_context=_ArrayItem(
output_context.value))
loop_generator = lambda cpp_parameter_name: output_context.TraceContainer(
container_type='Array',
iterator_name=iterator_name,
container_name=cpp_parameter_name,
loop_body=loop_body)
# Array might be a nullable kind.
for line in _WrapIfNullable(loop_generator):
yield line
return
def _TraceEventToString(cpp_parameter_name=cpp_parameter_name, kind=kind):
return 'base::trace_event::ValueToString(%s, "<value of type %s>")' % (
cpp_parameter_name, generator._GetCppWrapperParamType(kind))
if mojom.IsMapKind(kind):
iterator_name = 'item'
if generator.for_blink:
# WTF::HashMap<,>
key_access = '.key'
value_access = '.value'
else:
# base::flat_map<,>
key_access = '.first'
value_access = '.second'
loop_body = _WriteInputParamForTracingImpl(
generator=generator,
kind=kind.value_kind,
cpp_parameter_name=iterator_name + value_access,
output_context=_DictionaryItemWithCopiedKey(
value=output_context.value,
name=_TraceEventToString(cpp_parameter_name=iterator_name +
key_access,
kind=kind.key_kind)))
loop_generator = lambda cpp_parameter_name: output_context.TraceContainer(
container_type="Dictionary",
iterator_name=iterator_name,
container_name=cpp_parameter_name,
loop_body=loop_body)
# Dictionary might be a nullable kind.
for line in _WrapIfNullable(loop_generator):
yield line
return
if (mojom.IsInterfaceRequestKind(kind)
or mojom.IsAssociatedInterfaceRequestKind(kind)):
yield output_context.AddSingleValue('Boolean',
cpp_parameter_name + '.is_pending()')
return
if (mojom.IsAnyHandleOrInterfaceKind(kind)
and not mojom.IsInterfaceKind(kind)):
yield output_context.AddSingleValue('Boolean',
cpp_parameter_name + '.is_valid()')
return
""" The case |mojom.IsInterfaceKind(kind)| is not covered.
|mojom.IsInterfaceKind(kind) == True| for the following types:
|mojo::InterfacePtrInfo|, |mojo::InterfacePtr|.
There is |mojo::InterfacePtrInfo::is_valid|,
but not |mojo::InterfacePtrInfo::is_bound|.
There is |mojo::InterfacePtr::is_bound|,
but not |mojo::InterfacePtr::is_valid|.
Both |mojo::InterfacePtrInfo| and |mojo::InterfacePtr| are deprecated.
"""
yield output_context.AddSingleValue('String', _TraceEventToString())
def IsAnyHandleOrInterfaceField(field):
return mojom.IsAnyHandleOrInterfaceKind(field.kind)