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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/dom/custom/CustomElementsRegistry.h" | 5 #include "core/dom/custom/CustomElementsRegistry.h" |
6 | 6 |
| 7 // TODO(dominicc): Stop including Document.h when |
| 8 // v0CustomElementIsDefined has been removed. |
| 9 #include "bindings/core/v8/DOMWrapperWorld.h" |
7 #include "bindings/core/v8/ExceptionState.h" | 10 #include "bindings/core/v8/ExceptionState.h" |
8 #include "bindings/core/v8/ScriptState.h" | 11 #include "bindings/core/v8/ScriptState.h" |
| 12 #include "bindings/core/v8/ScriptValue.h" |
| 13 #include "bindings/core/v8/V8Binding.h" |
| 14 #include "bindings/core/v8/V8BindingMacros.h" |
| 15 #include "bindings/core/v8/V8HiddenValue.h" |
| 16 #include "core/dom/Document.h" |
9 #include "core/dom/ElementRegistrationOptions.h" | 17 #include "core/dom/ElementRegistrationOptions.h" |
| 18 #include "core/dom/ExceptionCode.h" |
| 19 #include "core/dom/custom/CustomElement.h" |
| 20 #include "core/dom/custom/CustomElementDefinition.h" |
| 21 #include "core/dom/custom/V0CustomElementRegistrationContext.h" |
| 22 #include "core/dom/custom/V0CustomElementRegistry.h" |
10 | 23 |
11 namespace blink { | 24 namespace blink { |
12 | 25 |
13 CustomElementsRegistry::CustomElementsRegistry() | 26 CustomElementsRegistry* CustomElementsRegistry::create( |
14 { | 27 ScriptState* scriptState, |
15 } | 28 V0CustomElementRegistrationContext* v0) |
16 | 29 { |
| 30 DCHECK(scriptState->world().isMainWorld()); |
| 31 CustomElementsRegistry* registry = new CustomElementsRegistry(v0); |
| 32 if (v0) |
| 33 v0->setV1(registry); |
| 34 |
| 35 v8::Isolate* isolate = scriptState->isolate(); |
| 36 v8::Local<v8::Object> wrapper = |
| 37 toV8(registry, scriptState).As<v8::Object>(); |
| 38 v8::Local<v8::String> name = |
| 39 V8HiddenValue::customElementsRegistryMap(isolate); |
| 40 v8::Local<v8::Map> map = v8::Map::New(isolate); |
| 41 bool didSetPrototype = |
| 42 V8HiddenValue::setHiddenValue(scriptState, wrapper, name, map); |
| 43 DCHECK(didSetPrototype); |
| 44 |
| 45 return registry; |
| 46 } |
| 47 |
| 48 CustomElementsRegistry::CustomElementsRegistry( |
| 49 const V0CustomElementRegistrationContext* v0) |
| 50 : m_v0(v0) |
| 51 { |
| 52 } |
| 53 |
| 54 // http://w3c.github.io/webcomponents/spec/custom/#dfn-element-definition |
17 void CustomElementsRegistry::define(ScriptState* scriptState, | 55 void CustomElementsRegistry::define(ScriptState* scriptState, |
18 const AtomicString& name, const ScriptValue& constructor, | 56 const AtomicString& name, const ScriptValue& constructorScriptValue, |
19 const ElementRegistrationOptions& options, ExceptionState& exceptionState) | 57 const ElementRegistrationOptions& options, ExceptionState& exceptionState) |
20 { | 58 { |
21 // TODO(kojii): Element definition process not implemented yet. | 59 DCHECK(scriptState->world().isMainWorld()); |
22 // http://w3c.github.io/webcomponents/spec/custom/#dfn-element-definition | 60 v8::Isolate* isolate = scriptState->isolate(); |
| 61 v8::Local<v8::Context> context = scriptState->context(); |
| 62 |
| 63 // TODO(dominicc): Make this check for constructors and not just |
| 64 // functions when |
| 65 // https://bugs.chromium.org/p/v8/issues/detail?id=4993 is fixed. |
| 66 v8::Local<v8::Value> constructorValue = constructorScriptValue.v8Value(); |
| 67 if (!constructorValue->IsFunction()) { |
| 68 exceptionState.throwTypeError( |
| 69 "constructor argument is not a constructor"); |
| 70 return; |
| 71 } |
| 72 v8::Local<v8::Object> constructor = constructorValue.As<v8::Object>(); |
| 73 |
| 74 // Raise an exception if the name is not valid. |
| 75 if (!CustomElement::isValidName(name)) { |
| 76 exceptionState.throwDOMException( |
| 77 SyntaxError, |
| 78 "\"" + name + "\" is not a valid custom element name"); |
| 79 return; |
| 80 } |
| 81 |
| 82 // Raise an exception if the name is already in use. |
| 83 if (nameIsDefined(name) || v0NameIsDefined(name)) { |
| 84 exceptionState.throwDOMException( |
| 85 NotSupportedError, |
| 86 "this name has already been used with this registry"); |
| 87 return; |
| 88 } |
| 89 |
| 90 // Raise an exception if the constructor is already registered. |
| 91 if (definitionForConstructor(scriptState, constructor)) { |
| 92 exceptionState.throwDOMException( |
| 93 NotSupportedError, |
| 94 "this constructor has already been used with this registry"); |
| 95 return; |
| 96 } |
| 97 |
| 98 // TODO(dominicc): Implement steps: |
| 99 // 5: localName |
| 100 // 6-7: extends processing |
| 101 // 8-9: observed attributes caching |
| 102 |
| 103 // TODO(dominicc): Add a test where the prototype getter destroys |
| 104 // the context. |
| 105 |
| 106 v8::TryCatch tryCatch(isolate); |
| 107 v8::Local<v8::String> prototypeString = |
| 108 v8AtomicString(isolate, "prototype"); |
| 109 v8::Local<v8::Value> prototypeValue; |
| 110 if (!v8Call( |
| 111 constructor->Get(context, prototypeString), prototypeValue)) { |
| 112 DCHECK(tryCatch.HasCaught()); |
| 113 tryCatch.ReThrow(); |
| 114 return; |
| 115 } |
| 116 if (!prototypeValue->IsObject()) { |
| 117 DCHECK(!tryCatch.HasCaught()); |
| 118 exceptionState.throwTypeError("constructor prototype is not an object"); |
| 119 return; |
| 120 } |
| 121 v8::Local<v8::Object> prototype = prototypeValue.As<v8::Object>(); |
| 122 |
| 123 // TODO(dominicc): Implement steps: |
| 124 // 12-13: connected callback |
| 125 // 14-15: disconnected callback |
| 126 // 16-17: attribute changed callback |
| 127 |
| 128 Id id = m_definitions.size(); |
| 129 v8::Local<v8::Value> idValue = v8::Integer::NewFromUnsigned(isolate, id); |
| 130 m_definitions.append(new CustomElementDefinition(this, id, name)); |
| 131 // This map is stored in a hidden reference from the |
| 132 // CustomElementsRegistry wrapper. |
| 133 v8::Local<v8::Map> map = idMap(scriptState); |
| 134 // The map keeps the constructor and prototypes alive. |
| 135 v8CallOrCrash(map->Set(context, constructor, idValue)); |
| 136 v8CallOrCrash(map->Set(context, idValue, prototype)); |
| 137 m_names.add(name); |
| 138 |
| 139 // TODO(dominicc): Implement steps: |
| 140 // 20: when-defined promise processing |
| 141 DCHECK(!tryCatch.HasCaught() || tryCatch.HasTerminated()); |
| 142 } |
| 143 |
| 144 CustomElementDefinition* CustomElementsRegistry::definitionForConstructor( |
| 145 ScriptState* scriptState, |
| 146 v8::Local<v8::Value> constructor) |
| 147 { |
| 148 Id id; |
| 149 if (!idForConstructor(scriptState, constructor, id)) |
| 150 return nullptr; |
| 151 return m_definitions[id]; |
| 152 } |
| 153 |
| 154 v8::Local<v8::Object> CustomElementsRegistry::prototype( |
| 155 ScriptState* scriptState, |
| 156 const CustomElementDefinition& def) |
| 157 { |
| 158 v8::Local<v8::Value> idValue = |
| 159 v8::Integer::NewFromUnsigned(scriptState->isolate(), def.id()); |
| 160 return v8CallOrCrash( |
| 161 idMap(scriptState)->Get(scriptState->context(), idValue)) |
| 162 .As<v8::Object>(); |
| 163 } |
| 164 |
| 165 bool CustomElementsRegistry::nameIsDefined(const AtomicString& name) const |
| 166 { |
| 167 return m_names.contains(name); |
| 168 } |
| 169 |
| 170 v8::Local<v8::Map> CustomElementsRegistry::idMap(ScriptState* scriptState) |
| 171 { |
| 172 DCHECK(scriptState->world().isMainWorld()); |
| 173 v8::Local<v8::Object> wrapper = |
| 174 toV8(this, scriptState).As<v8::Object>(); |
| 175 v8::Local<v8::String> name = V8HiddenValue::customElementsRegistryMap( |
| 176 scriptState->isolate()); |
| 177 return V8HiddenValue::getHiddenValue(scriptState, wrapper, name) |
| 178 .As<v8::Map>(); |
| 179 } |
| 180 |
| 181 bool CustomElementsRegistry::idForConstructor( |
| 182 ScriptState* scriptState, |
| 183 v8::Local<v8::Value> constructor, |
| 184 Id& id) |
| 185 { |
| 186 v8::Local<v8::Value> entry = v8CallOrCrash( |
| 187 idMap(scriptState)->Get(scriptState->context(), constructor)); |
| 188 if (!entry->IsUint32()) |
| 189 return false; |
| 190 id = v8CallOrCrash(entry->Uint32Value(scriptState->context())); |
| 191 return true; |
| 192 } |
| 193 |
| 194 bool CustomElementsRegistry::v0NameIsDefined(const AtomicString& name) |
| 195 { |
| 196 return m_v0.get() && m_v0->nameIsDefined(name); |
23 } | 197 } |
24 | 198 |
25 DEFINE_TRACE(CustomElementsRegistry) | 199 DEFINE_TRACE(CustomElementsRegistry) |
26 { | 200 { |
| 201 visitor->trace(m_definitions); |
| 202 visitor->trace(m_v0); |
27 } | 203 } |
28 | 204 |
29 } // namespace blink | 205 } // namespace blink |
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