Source/bindings/dart/DartCustomElement.cpp - Issue 24294002: Dartium changes for custom element lifecycle events.

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Issue 24294002: Dartium changes for custom element lifecycle events. (Closed) Base URL: svn://svn.chromium.org/multivm/trunk/webkit

Patch Set: Created 7 years, 3 months ago

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1 // Copyright 2013, Google Inc.

2 // All rights reserved.

3 //

4 // Redistribution and use in source and binary forms, with or without

5 // modification, are permitted provided that the following conditions are

6 // met:

7 //

8 // * Redistributions of source code must retain the above copyright

9 // notice, this list of conditions and the following disclaimer.

10 // * Redistributions in binary form must reproduce the above

11 // copyright notice, this list of conditions and the following disclaimer

12 // in the documentation and/or other materials provided with the

13 // distribution.

14 // * Neither the name of Google Inc. nor the names of its

15 // contributors may be used to endorse or promote products derived from

16 // this software without specific prior written permission.

17 //

18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

29

30 #include "config.h"

31 #include "DartCustomElement.h"

32

33 namespace WebCore {

34

35 Dart_Handle DartCustomElement::toDart(Element* impl, CreateWrapperFunction creat eWrapper)

36 {

37 if (!impl)

38 return Dart_Null();

39

40 HTMLElement* element = reinterpret_cast<HTMLElement*>(impl);

41

42 Dart_Handle oldInstance = DartDOMWrapper::lookupWrapper<DartHTMLElement>(ele ment);

43

44 // FIXME: Streamline the common path. It an element is already upgraded prop erly,

45 // we shouldn't need all this checking.

46

47 // Look up custom Dart type.

48 DartDOMData* domData = DartDOMData::current();

49 String name = element->localName();

50 DartCustomElementMap* map = domData->customElementMap();

51 Dart_PersistentHandle persistent = map->get(name);

52 if (!persistent) {

53 // Not a custom tag. Check for type extension.

54 if (element->hasAttribute("is")) {

55 name = element->getAttribute("is");

56 persistent = map->get(name);

57 }

58

59 // No custom type. Fall back onto builtin wrapper type.

60 if (!persistent) {

61 if (oldInstance)

62 return oldInstance;

63 return createWrapper.invoke(element);

64 }

65 }

66

67 Dart_Handle type = Dart_HandleFromPersistent(persistent);

68 ASSERT(!Dart_IsError(type));

69

70 if (oldInstance) {

71 // Previous wrapper exists. Test for upgrade.

72 Dart_Handle oldType = Dart_InstanceGetType(oldInstance);

73 if (Dart_IdentityEquals(oldType, type))

74 return oldInstance;

75 }

76

77 DartCustomElementMap* nativeMap = domData->customBaseElementMap();

78 Dart_Handle expectedNativeType = Dart_HandleFromPersistent(nativeMap->get(na me));

79 ASSERT(!Dart_IsError(expectedNativeType));

80

81 // FIXME: Avoid allocating the fallback wrapper until we know we need it.

82 Dart_Handle fallback = oldInstance ? oldInstance : createWrapper.invoke(elem ent);

83 Dart_Handle actualNativeType = Dart_InstanceGetType(fallback);

84 ASSERT(!Dart_IsError(actualNativeType));

85

86 if (!Dart_IdentityEquals(actualNativeType, expectedNativeType)) {

87 // The registered custom type does not match. Just fallback.

88 return fallback;

89 }

90 DartDOMWrapper::disassociateWrapper<DartHTMLElement>(element, fallback);

91

92 Dart_Handle newInstance = Dart_Allocate(type);

93 ASSERT(!Dart_IsError(newInstance));

94

95 Dart_Handle result = Dart_SetNativeInstanceField(newInstance, 0, reinterpret _cast<intptr_t>(element));

96 UNUSED_PARAM(result);

97 ASSERT(!Dart_IsError(result));

98

99 Dart_Handle wrapper = DartDOMWrapper::associateWrapper<DartHTMLElement>(elem ent, newInstance);

100 Dart_Invoke(wrapper, Dart_NewStringFromCString("created"), 0, 0);

101 return wrapper;

102 }

103

104 } // namespace WebCore

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