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 """Functions for type handling and type conversion (Blink/C++ <-> V8/JS).
31 Extends IdlType and IdlUnionType with V8-specific properties, methods, and
35 http://www.w3.org/TR/WebIDL/#es-type-mapping
37 Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
42 from idl_types import IdlTypeBase, IdlType, IdlUnionType, IdlArrayOrSequenceType, IdlNullableType
43 import v8_attributes # for IdlType.constructor_type_name
44 from v8_globals import includes
47 ################################################################################
48 # V8-specific handling of IDL types
49 ################################################################################
51 NON_WRAPPER_TYPES = frozenset([
56 'SerializedScriptValue',
59 # (cpp_type, v8_type), used by constructor templates
61 'ArrayBufferView': None,
62 'Float32Array': ('float', 'v8::kExternalFloatArray'),
63 'Float64Array': ('double', 'v8::kExternalDoubleArray'),
64 'Int8Array': ('signed char', 'v8::kExternalByteArray'),
65 'Int16Array': ('short', 'v8::kExternalShortArray'),
66 'Int32Array': ('int', 'v8::kExternalIntArray'),
67 'Uint8Array': ('unsigned char', 'v8::kExternalUnsignedByteArray'),
68 'Uint8ClampedArray': ('unsigned char', 'v8::kExternalPixelArray'),
69 'Uint16Array': ('unsigned short', 'v8::kExternalUnsignedShortArray'),
70 'Uint32Array': ('unsigned int', 'v8::kExternalUnsignedIntArray'),
73 IdlType.is_typed_array_element_type = property(
74 lambda self: self.base_type in TYPED_ARRAYS)
76 IdlType.is_wrapper_type = property(
77 lambda self: (self.is_interface_type and
78 self.base_type not in NON_WRAPPER_TYPES))
81 ################################################################################
83 ################################################################################
85 CPP_TYPE_SAME_AS_IDL_TYPE = set([
96 CPP_UNSIGNED_TYPES = set([
102 CPP_SPECIAL_CONVERSION_RULES = {
104 'Dictionary': 'Dictionary',
105 'EventHandler': 'EventListener*',
106 'NodeFilter': 'RefPtrWillBeRawPtr<NodeFilter>',
107 'Promise': 'ScriptPromise',
108 'ScriptValue': 'ScriptValue',
109 # FIXME: Eliminate custom bindings for XPathNSResolver http://crbug.com/345529
110 'XPathNSResolver': 'RefPtrWillBeRawPtr<XPathNSResolver>',
112 'unrestricted double': 'double',
113 'unrestricted float': 'float',
117 def cpp_type(idl_type, extended_attributes=None, raw_type=False, used_as_rvalue_type=False, used_as_variadic_argument=False, used_in_cpp_sequence=False):
118 """Returns C++ type corresponding to IDL type.
120 |idl_type| argument is of type IdlType, while return value is a string
126 bool, True if idl_type's raw/primitive C++ type should be returned.
128 bool, True if the C++ type is used as an argument or the return
130 used_as_variadic_argument:
131 bool, True if the C++ type is used as a variadic argument of a method.
132 used_in_cpp_sequence:
133 bool, True if the C++ type is used as an element of a container.
134 Containers can be an array, a sequence or a dictionary.
137 if extended_attributes.get('TreatNullAs') == 'EmptyString':
138 return 'TreatNullAsEmptyString'
139 if idl_type.is_nullable or extended_attributes.get('TreatNullAs') == 'NullString':
140 if extended_attributes.get('TreatUndefinedAs') == 'NullString':
141 return 'TreatNullAndUndefinedAsNullString'
142 return 'TreatNullAsNullString'
145 extended_attributes = extended_attributes or {}
146 idl_type = idl_type.preprocessed_type
148 # Array or sequence types
149 if used_as_variadic_argument:
150 native_array_element_type = idl_type
152 native_array_element_type = idl_type.native_array_element_type
153 if native_array_element_type:
154 vector_type = cpp_ptr_type('Vector', 'HeapVector', native_array_element_type.gc_type)
155 vector_template_type = cpp_template_type(vector_type, native_array_element_type.cpp_type_args(used_in_cpp_sequence=True))
156 if used_as_rvalue_type:
157 return 'const %s&' % vector_template_type
158 return vector_template_type
161 base_idl_type = idl_type.base_type
163 if base_idl_type in CPP_TYPE_SAME_AS_IDL_TYPE:
165 if base_idl_type in CPP_INT_TYPES:
167 if base_idl_type in CPP_UNSIGNED_TYPES:
169 if base_idl_type in CPP_SPECIAL_CONVERSION_RULES:
170 return CPP_SPECIAL_CONVERSION_RULES[base_idl_type]
172 if base_idl_type in NON_WRAPPER_TYPES:
173 return ('PassRefPtr<%s>' if used_as_rvalue_type else 'RefPtr<%s>') % base_idl_type
174 if idl_type.is_string_type:
177 return 'V8StringResource<%s>' % string_mode()
179 if idl_type.is_typed_array_element_type and raw_type:
180 return base_idl_type + '*'
181 if idl_type.is_interface_type:
182 implemented_as_class = idl_type.implemented_as
184 return implemented_as_class + '*'
185 new_type = 'Member' if used_in_cpp_sequence else 'RawPtr'
186 ptr_type = cpp_ptr_type(('PassRefPtr' if used_as_rvalue_type else 'RefPtr'), new_type, idl_type.gc_type)
187 return cpp_template_type(ptr_type, implemented_as_class)
188 # Default, assume native type is a pointer with same type name as idl type
189 return base_idl_type + '*'
192 def cpp_type_initializer(idl_type):
193 """Returns a string containing a C++ initialization statement for the
196 |idl_type| argument is of type IdlType.
199 base_idl_type = idl_type.base_type
201 if idl_type.native_array_element_type:
203 if idl_type.is_numeric_type:
205 if base_idl_type == 'boolean':
207 if (base_idl_type in NON_WRAPPER_TYPES or
208 base_idl_type in CPP_SPECIAL_CONVERSION_RULES or
209 base_idl_type == 'any' or
210 idl_type.is_string_type or
216 def cpp_type_union(idl_type, extended_attributes=None, raw_type=False):
217 # FIXME: Need to revisit the design of union support.
218 # http://crbug.com/240176
222 def cpp_type_initializer_union(idl_type):
223 return (member_type.cpp_type_initializer for member_type in idl_type.member_types)
226 # Allow access as idl_type.cpp_type if no arguments
227 IdlTypeBase.cpp_type = property(cpp_type)
228 IdlTypeBase.cpp_type_initializer = property(cpp_type_initializer)
229 IdlTypeBase.cpp_type_args = cpp_type
230 IdlUnionType.cpp_type = property(cpp_type_union)
231 IdlUnionType.cpp_type_initializer = property(cpp_type_initializer_union)
232 IdlUnionType.cpp_type_args = cpp_type_union
235 IdlArrayOrSequenceType.native_array_element_type = property(
236 lambda self: self.element_type)
239 def cpp_template_type(template, inner_type):
240 """Returns C++ template specialized to type, with space added if needed."""
241 if inner_type.endswith('>'):
242 format_string = '{template}<{inner_type} >'
244 format_string = '{template}<{inner_type}>'
245 return format_string.format(template=template, inner_type=inner_type)
248 def cpp_ptr_type(old_type, new_type, gc_type):
249 if gc_type == 'GarbageCollectedObject':
251 if gc_type == 'WillBeGarbageCollectedObject':
252 if old_type == 'Vector':
253 return 'WillBe' + new_type
254 return old_type + 'WillBe' + new_type
258 def v8_type(interface_name):
259 return 'V8' + interface_name
263 # This handles [ImplementedAs] on interface types, not [ImplementedAs] in the
264 # interface being generated. e.g., given:
265 # Foo.idl: interface Foo {attribute Bar bar};
266 # Bar.idl: [ImplementedAs=Zork] interface Bar {};
267 # when generating bindings for Foo, the [ImplementedAs] on Bar is needed.
268 # This data is external to Foo.idl, and hence computed as global information in
269 # compute_interfaces_info.py to avoid having to parse IDLs of all used interfaces.
270 IdlType.implemented_as_interfaces = {}
273 def implemented_as(idl_type):
274 base_idl_type = idl_type.base_type
275 if base_idl_type in IdlType.implemented_as_interfaces:
276 return IdlType.implemented_as_interfaces[base_idl_type]
280 IdlType.implemented_as = property(implemented_as)
282 IdlType.set_implemented_as_interfaces = classmethod(
283 lambda cls, new_implemented_as_interfaces:
284 cls.implemented_as_interfaces.update(new_implemented_as_interfaces))
288 IdlType.garbage_collected_types = set()
290 IdlType.is_garbage_collected = property(
291 lambda self: self.base_type in IdlType.garbage_collected_types)
293 IdlType.set_garbage_collected_types = classmethod(
294 lambda cls, new_garbage_collected_types:
295 cls.garbage_collected_types.update(new_garbage_collected_types))
298 # [WillBeGarbageCollected]
299 IdlType.will_be_garbage_collected_types = set()
301 IdlType.is_will_be_garbage_collected = property(
302 lambda self: self.base_type in IdlType.will_be_garbage_collected_types)
304 IdlType.set_will_be_garbage_collected_types = classmethod(
305 lambda cls, new_will_be_garbage_collected_types:
306 cls.will_be_garbage_collected_types.update(new_will_be_garbage_collected_types))
309 def gc_type(idl_type):
310 if idl_type.is_garbage_collected:
311 return 'GarbageCollectedObject'
312 if idl_type.is_will_be_garbage_collected:
313 return 'WillBeGarbageCollectedObject'
314 return 'RefCountedObject'
316 IdlTypeBase.gc_type = property(gc_type)
319 ################################################################################
321 ################################################################################
323 def includes_for_cpp_class(class_name, relative_dir_posix):
324 return set([posixpath.join('bindings', relative_dir_posix, class_name + '.h')])
327 INCLUDES_FOR_TYPE = {
329 'Dictionary': set(['bindings/core/v8/Dictionary.h']),
330 'EventHandler': set(['bindings/core/v8/V8AbstractEventListener.h',
331 'bindings/core/v8/V8EventListenerList.h']),
332 'EventListener': set(['bindings/core/v8/BindingSecurity.h',
333 'bindings/core/v8/V8EventListenerList.h',
334 'core/frame/LocalDOMWindow.h']),
335 'HTMLCollection': set(['bindings/core/v8/V8HTMLCollection.h',
336 'core/dom/ClassCollection.h',
337 'core/dom/TagCollection.h',
338 'core/html/HTMLCollection.h',
339 'core/html/HTMLDataListOptionsCollection.h',
340 'core/html/HTMLFormControlsCollection.h',
341 'core/html/HTMLTableRowsCollection.h']),
342 'NodeList': set(['bindings/core/v8/V8NodeList.h',
343 'core/dom/NameNodeList.h',
344 'core/dom/NodeList.h',
345 'core/dom/StaticNodeList.h',
346 'core/html/LabelsNodeList.h']),
347 'Promise': set(['bindings/core/v8/ScriptPromise.h']),
348 'SerializedScriptValue': set(['bindings/core/v8/SerializedScriptValue.h']),
349 'ScriptValue': set(['bindings/core/v8/ScriptValue.h']),
353 def includes_for_type(idl_type):
354 idl_type = idl_type.preprocessed_type
357 base_idl_type = idl_type.base_type
358 if base_idl_type in INCLUDES_FOR_TYPE:
359 return INCLUDES_FOR_TYPE[base_idl_type]
360 if idl_type.is_basic_type:
362 if idl_type.is_typed_array_element_type:
363 return set(['bindings/core/v8/custom/V8%sCustom.h' % base_idl_type])
364 if base_idl_type.endswith('ConstructorConstructor'):
365 # FIXME: rename to NamedConstructor
366 # FIXME: replace with a [NamedConstructorAttribute] extended attribute
367 # Ending with 'ConstructorConstructor' indicates a named constructor,
368 # and these do not have header files, as they are part of the generated
369 # bindings for the interface
371 if base_idl_type.endswith('Constructor'):
372 # FIXME: replace with a [ConstructorAttribute] extended attribute
373 base_idl_type = idl_type.constructor_type_name
374 if base_idl_type not in component_dir:
376 return set(['bindings/%s/v8/V8%s.h' % (component_dir[base_idl_type],
379 IdlType.includes_for_type = property(includes_for_type)
380 IdlUnionType.includes_for_type = property(
381 lambda self: set.union(*[member_type.includes_for_type
382 for member_type in self.member_types]))
383 IdlArrayOrSequenceType.includes_for_type = property(
384 lambda self: self.element_type.includes_for_type)
387 def add_includes_for_type(idl_type):
388 includes.update(idl_type.includes_for_type)
390 IdlTypeBase.add_includes_for_type = add_includes_for_type
393 def includes_for_interface(interface_name):
394 return IdlType(interface_name).includes_for_type
397 def add_includes_for_interface(interface_name):
398 includes.update(includes_for_interface(interface_name))
401 def impl_should_use_nullable_container(idl_type):
402 return not(idl_type.cpp_type_has_null_value)
404 IdlTypeBase.impl_should_use_nullable_container = property(
405 impl_should_use_nullable_container)
408 def impl_includes_for_type(idl_type, interfaces_info):
409 includes_for_type = set()
410 if idl_type.impl_should_use_nullable_container:
411 includes_for_type.add('bindings/core/v8/Nullable.h')
413 idl_type = idl_type.preprocessed_type
414 native_array_element_type = idl_type.native_array_element_type
415 if native_array_element_type:
416 includes_for_type.update(impl_includes_for_type(
417 native_array_element_type, interfaces_info))
418 includes_for_type.add('wtf/Vector.h')
420 base_idl_type = idl_type.base_type
421 if idl_type.is_string_type:
422 includes_for_type.add('wtf/text/WTFString.h')
423 if base_idl_type in interfaces_info:
424 interface_info = interfaces_info[idl_type.base_type]
425 includes_for_type.add(interface_info['include_path'])
426 if base_idl_type in INCLUDES_FOR_TYPE:
427 includes_for_type.update(INCLUDES_FOR_TYPE[base_idl_type])
428 return includes_for_type
430 IdlTypeBase.impl_includes_for_type = impl_includes_for_type
436 def set_component_dirs(new_component_dirs):
437 component_dir.update(new_component_dirs)
440 ################################################################################
442 ################################################################################
444 V8_VALUE_TO_CPP_VALUE = {
446 'Date': 'toCoreDate({v8_value})',
447 'DOMString': '{v8_value}',
448 'ByteString': 'toByteString({arguments})',
449 'ScalarValueString': 'toScalarValueString({arguments})',
450 'boolean': '{v8_value}->BooleanValue()',
451 'float': 'toFloat({arguments})',
452 'unrestricted float': 'toFloat({arguments})',
453 'double': 'toDouble({arguments})',
454 'unrestricted double': 'toDouble({arguments})',
455 'byte': 'toInt8({arguments})',
456 'octet': 'toUInt8({arguments})',
457 'short': 'toInt16({arguments})',
458 'unsigned short': 'toUInt16({arguments})',
459 'long': 'toInt32({arguments})',
460 'unsigned long': 'toUInt32({arguments})',
461 'long long': 'toInt64({arguments})',
462 'unsigned long long': 'toUInt64({arguments})',
464 'Dictionary': 'Dictionary({v8_value}, {isolate})',
465 'EventTarget': 'V8DOMWrapper::isDOMWrapper({v8_value}) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast({v8_value}))->toEventTarget(v8::Handle<v8::Object>::Cast({v8_value})) : 0',
466 'NodeFilter': 'toNodeFilter({v8_value}, info.Holder(), ScriptState::current({isolate}))',
467 'Promise': 'ScriptPromise::cast(ScriptState::current({isolate}), {v8_value})',
468 'SerializedScriptValue': 'SerializedScriptValue::create({v8_value}, 0, 0, exceptionState, {isolate})',
469 'ScriptValue': 'ScriptValue(ScriptState::current({isolate}), {v8_value})',
470 'Window': 'toDOMWindow({v8_value}, {isolate})',
471 'XPathNSResolver': 'toXPathNSResolver({v8_value}, {isolate})',
475 def v8_conversion_needs_exception_state(idl_type):
476 return (idl_type.is_numeric_type or
477 idl_type.is_dictionary or
478 idl_type.name in ('ByteString', 'ScalarValueString', 'SerializedScriptValue'))
480 IdlType.v8_conversion_needs_exception_state = property(v8_conversion_needs_exception_state)
481 IdlArrayOrSequenceType.v8_conversion_needs_exception_state = True
484 TRIVIAL_CONVERSIONS = frozenset([
495 def v8_conversion_is_trivial(idl_type):
496 # The conversion is a simple expression that returns the converted value and
497 # cannot raise an exception.
498 return (idl_type.base_type in TRIVIAL_CONVERSIONS or
499 idl_type.is_wrapper_type)
501 IdlType.v8_conversion_is_trivial = property(v8_conversion_is_trivial)
504 def v8_value_to_cpp_value(idl_type, extended_attributes, v8_value, index, isolate):
505 if idl_type.name == 'void':
508 # Array or sequence types
509 native_array_element_type = idl_type.native_array_element_type
510 if native_array_element_type:
511 return v8_value_to_cpp_value_array_or_sequence(native_array_element_type, v8_value, index)
514 idl_type = idl_type.preprocessed_type
515 add_includes_for_type(idl_type)
516 base_idl_type = idl_type.base_type
518 if 'EnforceRange' in extended_attributes:
519 arguments = ', '.join([v8_value, 'EnforceRange', 'exceptionState'])
520 elif 'Clamp' in extended_attributes:
521 arguments = ', '.join([v8_value, 'Clamp', 'exceptionState'])
522 elif idl_type.v8_conversion_needs_exception_state:
523 arguments = ', '.join([v8_value, 'exceptionState'])
527 if base_idl_type in V8_VALUE_TO_CPP_VALUE:
528 cpp_expression_format = V8_VALUE_TO_CPP_VALUE[base_idl_type]
529 elif idl_type.is_typed_array_element_type:
530 cpp_expression_format = (
531 '{v8_value}->Is{idl_type}() ? '
532 'V8{idl_type}::toImpl(v8::Handle<v8::{idl_type}>::Cast({v8_value})) : 0')
533 elif idl_type.is_dictionary:
534 cpp_expression_format = 'V8{idl_type}::toImpl({isolate}, {v8_value}, exceptionState)'
536 cpp_expression_format = (
537 'V8{idl_type}::toImplWithTypeCheck({isolate}, {v8_value})')
539 return cpp_expression_format.format(arguments=arguments, idl_type=base_idl_type, v8_value=v8_value, isolate=isolate)
542 def v8_value_to_cpp_value_array_or_sequence(native_array_element_type, v8_value, index, isolate='info.GetIsolate()'):
543 # Index is None for setters, index (starting at 0) for method arguments,
544 # and is used to provide a human-readable exception message
546 index = 0 # special case, meaning "setter"
548 index += 1 # human-readable index
549 if (native_array_element_type.is_interface_type and
550 native_array_element_type.name != 'Dictionary'):
552 ref_ptr_type = cpp_ptr_type('RefPtr', 'Member', native_array_element_type.gc_type)
553 expression_format = '(to{ref_ptr_type}NativeArray<{native_array_element_type}, V8{native_array_element_type}>({v8_value}, {index}, {isolate}, exceptionState))'
554 add_includes_for_type(native_array_element_type)
557 this_cpp_type = native_array_element_type.cpp_type
558 expression_format = 'toImplArray<{cpp_type}>({v8_value}, {index}, {isolate}, exceptionState)'
559 expression = expression_format.format(native_array_element_type=native_array_element_type.name, cpp_type=this_cpp_type, index=index, ref_ptr_type=ref_ptr_type, v8_value=v8_value, isolate=isolate)
563 def v8_value_to_local_cpp_value(idl_type, extended_attributes, v8_value, variable_name, index=None, declare_variable=True, isolate='info.GetIsolate()', used_in_private_script=False, return_promise=False):
564 """Returns an expression that converts a V8 value to a C++ value and stores it as a local value."""
566 # FIXME: Support union type.
567 if idl_type.is_union_type:
568 return '/* no V8 -> C++ conversion for IDL union type: %s */' % idl_type.name
570 this_cpp_type = idl_type.cpp_type_args(extended_attributes=extended_attributes, raw_type=True)
571 idl_type = idl_type.preprocessed_type
573 if idl_type.base_type in ('void', 'object', 'EventHandler', 'EventListener'):
574 return '/* no V8 -> C++ conversion for IDL type: %s */' % idl_type.name
576 cpp_value = v8_value_to_cpp_value(idl_type, extended_attributes, v8_value, index, isolate)
577 if idl_type.is_string_type or idl_type.v8_conversion_needs_exception_state:
578 # Types that need error handling and use one of a group of (C++) macros
579 # to take care of this.
581 args = [variable_name, cpp_value]
583 if idl_type.v8_conversion_needs_exception_state:
584 macro = 'TONATIVE_DEFAULT_EXCEPTIONSTATE' if used_in_private_script else 'TONATIVE_VOID_EXCEPTIONSTATE'
586 macro = 'TOSTRING_VOID_EXCEPTIONSTATE'
588 macro = 'TOSTRING_DEFAULT' if used_in_private_script else 'TOSTRING_VOID'
590 if macro.endswith('_EXCEPTIONSTATE'):
591 args.append('exceptionState')
593 if used_in_private_script:
601 if macro.endswith('_EXCEPTIONSTATE'):
602 args.append('ScriptState::current(%s)' % isolate)
605 args.insert(0, this_cpp_type)
607 suffix += '_INTERNAL'
609 return '%s(%s)' % (macro + suffix, ', '.join(args))
611 # Types that don't need error handling, and simply assign a value to the
614 if not idl_type.v8_conversion_is_trivial:
615 raise Exception('unclassified V8 -> C++ conversion for IDL type: %s' % idl_type.name)
617 assignment = '%s = %s' % (variable_name, cpp_value)
619 return '%s %s' % (this_cpp_type, assignment)
623 IdlTypeBase.v8_value_to_local_cpp_value = v8_value_to_local_cpp_value
626 ################################################################################
628 ################################################################################
630 def preprocess_idl_type(idl_type):
632 # Enumerations are internally DOMStrings
633 return IdlType('DOMString')
634 if (idl_type.name in ['Any', 'Object'] or idl_type.is_callback_function):
635 return IdlType('ScriptValue')
638 IdlTypeBase.preprocessed_type = property(preprocess_idl_type)
641 def preprocess_idl_type_and_value(idl_type, cpp_value, extended_attributes):
642 """Returns IDL type and value, with preliminary type conversions applied."""
643 idl_type = idl_type.preprocessed_type
644 if idl_type.name == 'Promise':
645 idl_type = IdlType('ScriptValue')
646 if idl_type.base_type in ['long long', 'unsigned long long']:
647 # long long and unsigned long long are not representable in ECMAScript;
648 # we represent them as doubles.
649 is_nullable = idl_type.is_nullable
650 idl_type = IdlType('double')
652 idl_type = IdlNullableType(idl_type)
653 cpp_value = 'static_cast<double>(%s)' % cpp_value
654 # HTML5 says that unsigned reflected attributes should be in the range
655 # [0, 2^31). When a value isn't in this range, a default value (or 0)
656 # should be returned instead.
657 extended_attributes = extended_attributes or {}
658 if ('Reflect' in extended_attributes and
659 idl_type.base_type in ['unsigned long', 'unsigned short']):
660 cpp_value = cpp_value.replace('getUnsignedIntegralAttribute',
661 'getIntegralAttribute')
662 cpp_value = 'std::max(0, static_cast<int>(%s))' % cpp_value
663 return idl_type, cpp_value
666 def v8_conversion_type(idl_type, extended_attributes):
667 """Returns V8 conversion type, adding any additional includes.
669 The V8 conversion type is used to select the C++ -> V8 conversion function
670 or v8SetReturnValue* function; it can be an idl_type, a cpp_type, or a
671 separate name for the type of conversion (e.g., 'DOMWrapper').
673 extended_attributes = extended_attributes or {}
675 # FIXME: Support union type.
676 if idl_type.is_union_type:
679 # Array or sequence types
680 native_array_element_type = idl_type.native_array_element_type
681 if native_array_element_type:
682 if native_array_element_type.is_interface_type:
683 add_includes_for_type(native_array_element_type)
687 base_idl_type = idl_type.base_type
688 # Basic types, without additional includes
689 if base_idl_type in CPP_INT_TYPES:
691 if base_idl_type in CPP_UNSIGNED_TYPES:
693 if idl_type.is_string_type:
694 if idl_type.is_nullable:
695 return 'StringOrNull'
696 if 'TreatReturnedNullStringAs' not in extended_attributes:
698 treat_returned_null_string_as = extended_attributes['TreatReturnedNullStringAs']
699 if treat_returned_null_string_as == 'Null':
700 return 'StringOrNull'
701 if treat_returned_null_string_as == 'Undefined':
702 return 'StringOrUndefined'
703 raise 'Unrecognized TreatReturnedNullStringAs value: "%s"' % treat_returned_null_string_as
704 if idl_type.is_basic_type or base_idl_type == 'ScriptValue':
707 # Data type with potential additional includes
708 add_includes_for_type(idl_type)
709 if base_idl_type in V8_SET_RETURN_VALUE: # Special v8SetReturnValue treatment
715 IdlTypeBase.v8_conversion_type = v8_conversion_type
718 V8_SET_RETURN_VALUE = {
719 'boolean': 'v8SetReturnValueBool(info, {cpp_value})',
720 'int': 'v8SetReturnValueInt(info, {cpp_value})',
721 'unsigned': 'v8SetReturnValueUnsigned(info, {cpp_value})',
722 'DOMString': 'v8SetReturnValueString(info, {cpp_value}, info.GetIsolate())',
723 'ByteString': 'v8SetReturnValueString(info, {cpp_value}, info.GetIsolate())',
724 'ScalarValueString': 'v8SetReturnValueString(info, {cpp_value}, info.GetIsolate())',
725 # [TreatReturnedNullStringAs]
726 'StringOrNull': 'v8SetReturnValueStringOrNull(info, {cpp_value}, info.GetIsolate())',
727 'StringOrUndefined': 'v8SetReturnValueStringOrUndefined(info, {cpp_value}, info.GetIsolate())',
729 # No special v8SetReturnValue* function (set value directly)
730 'float': 'v8SetReturnValue(info, {cpp_value})',
731 'unrestricted float': 'v8SetReturnValue(info, {cpp_value})',
732 'double': 'v8SetReturnValue(info, {cpp_value})',
733 'unrestricted double': 'v8SetReturnValue(info, {cpp_value})',
734 # No special v8SetReturnValue* function, but instead convert value to V8
735 # and then use general v8SetReturnValue.
736 'array': 'v8SetReturnValue(info, {cpp_value})',
737 'Date': 'v8SetReturnValue(info, {cpp_value})',
738 'EventHandler': 'v8SetReturnValue(info, {cpp_value})',
739 'ScriptValue': 'v8SetReturnValue(info, {cpp_value})',
740 'SerializedScriptValue': 'v8SetReturnValue(info, {cpp_value})',
742 'DOMWrapperForMainWorld': 'v8SetReturnValueForMainWorld(info, WTF::getPtr({cpp_value}))',
743 'DOMWrapperFast': 'v8SetReturnValueFast(info, WTF::getPtr({cpp_value}), {script_wrappable})',
744 'DOMWrapperDefault': 'v8SetReturnValue(info, {cpp_value})',
748 def v8_set_return_value(idl_type, cpp_value, extended_attributes=None, script_wrappable='', release=False, for_main_world=False):
749 """Returns a statement that converts a C++ value to a V8 value and sets it as a return value.
752 def dom_wrapper_conversion_type():
753 if not script_wrappable:
754 return 'DOMWrapperDefault'
756 return 'DOMWrapperForMainWorld'
757 return 'DOMWrapperFast'
759 idl_type, cpp_value = preprocess_idl_type_and_value(idl_type, cpp_value, extended_attributes)
760 this_v8_conversion_type = idl_type.v8_conversion_type(extended_attributes)
761 # SetReturn-specific overrides
762 if this_v8_conversion_type in ['Date', 'EventHandler', 'ScriptValue', 'SerializedScriptValue', 'array']:
763 # Convert value to V8 and then use general v8SetReturnValue
764 cpp_value = idl_type.cpp_value_to_v8_value(cpp_value, extended_attributes=extended_attributes)
765 if this_v8_conversion_type == 'DOMWrapper':
766 this_v8_conversion_type = dom_wrapper_conversion_type()
768 format_string = V8_SET_RETURN_VALUE[this_v8_conversion_type]
769 # FIXME: oilpan: Remove .release() once we remove all RefPtrs from generated code.
771 cpp_value = '%s.release()' % cpp_value
772 statement = format_string.format(cpp_value=cpp_value, script_wrappable=script_wrappable)
776 def v8_set_return_value_union(idl_type, cpp_value, extended_attributes=None, script_wrappable='', release=False, for_main_world=False):
777 # FIXME: Need to revisit the design of union support.
778 # http://crbug.com/240176
782 IdlTypeBase.v8_set_return_value = v8_set_return_value
783 IdlUnionType.v8_set_return_value = v8_set_return_value_union
785 IdlType.release = property(lambda self: self.is_interface_type)
786 IdlUnionType.release = property(
787 lambda self: [member_type.is_interface_type
788 for member_type in self.member_types])
791 CPP_VALUE_TO_V8_VALUE = {
793 'Date': 'v8DateOrNaN({cpp_value}, {isolate})',
794 'DOMString': 'v8String({isolate}, {cpp_value})',
795 'ByteString': 'v8String({isolate}, {cpp_value})',
796 'ScalarValueString': 'v8String({isolate}, {cpp_value})',
797 'boolean': 'v8Boolean({cpp_value}, {isolate})',
798 'int': 'v8::Integer::New({isolate}, {cpp_value})',
799 'unsigned': 'v8::Integer::NewFromUnsigned({isolate}, {cpp_value})',
800 'float': 'v8::Number::New({isolate}, {cpp_value})',
801 'unrestricted float': 'v8::Number::New({isolate}, {cpp_value})',
802 'double': 'v8::Number::New({isolate}, {cpp_value})',
803 'unrestricted double': 'v8::Number::New({isolate}, {cpp_value})',
804 'void': 'v8Undefined()',
805 # [TreatReturnedNullStringAs]
806 'StringOrNull': '{cpp_value}.isNull() ? v8::Handle<v8::Value>(v8::Null({isolate})) : v8String({isolate}, {cpp_value})',
807 'StringOrUndefined': '{cpp_value}.isNull() ? v8Undefined() : v8String({isolate}, {cpp_value})',
809 'EventHandler': '{cpp_value} ? v8::Handle<v8::Value>(V8AbstractEventListener::cast({cpp_value})->getListenerObject(impl->executionContext())) : v8::Handle<v8::Value>(v8::Null({isolate}))',
810 'ScriptValue': '{cpp_value}.v8Value()',
811 'SerializedScriptValue': '{cpp_value} ? {cpp_value}->deserialize() : v8::Handle<v8::Value>(v8::Null({isolate}))',
813 'array': 'v8Array({cpp_value}, {creation_context}, {isolate})',
814 'DOMWrapper': 'toV8({cpp_value}, {creation_context}, {isolate})',
818 def cpp_value_to_v8_value(idl_type, cpp_value, isolate='info.GetIsolate()', creation_context='info.Holder()', extended_attributes=None):
819 """Returns an expression that converts a C++ value to a V8 value."""
820 # the isolate parameter is needed for callback interfaces
821 idl_type, cpp_value = preprocess_idl_type_and_value(idl_type, cpp_value, extended_attributes)
822 this_v8_conversion_type = idl_type.v8_conversion_type(extended_attributes)
823 format_string = CPP_VALUE_TO_V8_VALUE[this_v8_conversion_type]
824 statement = format_string.format(cpp_value=cpp_value, isolate=isolate, creation_context=creation_context)
827 IdlTypeBase.cpp_value_to_v8_value = cpp_value_to_v8_value
830 def literal_cpp_value(idl_type, idl_literal):
831 """Converts an expression that is a valid C++ literal for this type."""
832 # FIXME: add validation that idl_type and idl_literal are compatible
833 literal_value = str(idl_literal)
834 if idl_type.base_type in CPP_UNSIGNED_TYPES:
835 return literal_value + 'u'
838 IdlType.literal_cpp_value = literal_cpp_value
841 ################################################################################
842 # Utility properties for nullable types
843 ################################################################################
846 def cpp_type_has_null_value(idl_type):
847 # - String types (String/AtomicString) represent null as a null string,
848 # i.e. one for which String::isNull() returns true.
849 # - Enum types, as they are implemented as Strings.
850 # - Wrapper types (raw pointer or RefPtr/PassRefPtr) represent null as
852 # - Dictionary types represent null as a null pointer. They are garbage
853 # collected so their type is raw pointer.
854 # - 'Object' type. We use ScriptValue for object type.
855 return (idl_type.is_string_type or idl_type.is_wrapper_type or
856 idl_type.is_enum or idl_type.is_dictionary or idl_type.base_type == 'object')
858 IdlTypeBase.cpp_type_has_null_value = property(cpp_type_has_null_value)
861 def is_implicit_nullable(idl_type):
862 # Nullable type where the corresponding C++ type supports a null value.
863 return idl_type.is_nullable and idl_type.cpp_type_has_null_value
866 def is_explicit_nullable(idl_type):
867 # Nullable type that isn't implicit nullable (see above.) For such types,
868 # we use Nullable<T> or similar explicit ways to represent a null value.
869 return idl_type.is_nullable and not idl_type.is_implicit_nullable
871 IdlTypeBase.is_implicit_nullable = property(is_implicit_nullable)
872 IdlUnionType.is_implicit_nullable = False
873 IdlTypeBase.is_explicit_nullable = property(is_explicit_nullable)