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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 "bindings/core/v8/ScriptCustomElementDefinition.h" | 5 #include "bindings/core/v8/ScriptCustomElementDefinition.h" |
6 | 6 |
7 #include "bindings/core/v8/ScriptState.h" | 7 #include "bindings/core/v8/ScriptState.h" |
8 #include "bindings/core/v8/V8Binding.h" | 8 #include "bindings/core/v8/V8Binding.h" |
9 #include "bindings/core/v8/V8CustomElementsRegistry.h" | 9 #include "bindings/core/v8/V8CustomElementsRegistry.h" |
10 #include "bindings/core/v8/V8HiddenValue.h" | 10 #include "bindings/core/v8/V8HiddenValue.h" |
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67 // | 67 // |
68 // At a meta-level, this downcast is safe because there is | 68 // At a meta-level, this downcast is safe because there is |
69 // currently only one implementation of CustomElementDefinition in | 69 // currently only one implementation of CustomElementDefinition in |
70 // product code and that is ScriptCustomElementDefinition. But | 70 // product code and that is ScriptCustomElementDefinition. But |
71 // that may change in the future. | 71 // that may change in the future. |
72 CustomElementDefinition* definition = registry->definitionForName(name); | 72 CustomElementDefinition* definition = registry->definitionForName(name); |
73 CHECK(definition); | 73 CHECK(definition); |
74 return static_cast<ScriptCustomElementDefinition*>(definition); | 74 return static_cast<ScriptCustomElementDefinition*>(definition); |
75 } | 75 } |
76 | 76 |
77 static void keepAliveIfNotEmpty(v8::Local<v8::Array>& array, uint32_t index, | |
78 const v8::Local<v8::Object>& value, | |
79 ScopedPersistent<v8::Object>& persistent, | |
80 ScriptState* scriptState) | |
81 { | |
82 if (value.IsEmpty()) | |
83 return; | |
84 | |
85 v8CallOrCrash(array->Set(scriptState->context(), index, value)); | |
86 | |
87 persistent.set(scriptState->isolate(), value); | |
88 persistent.setPhantom(); | |
89 } | |
90 | |
77 ScriptCustomElementDefinition* ScriptCustomElementDefinition::create( | 91 ScriptCustomElementDefinition* ScriptCustomElementDefinition::create( |
78 ScriptState* scriptState, | 92 ScriptState* scriptState, |
79 CustomElementsRegistry* registry, | 93 CustomElementsRegistry* registry, |
80 const CustomElementDescriptor& descriptor, | 94 const CustomElementDescriptor& descriptor, |
81 const v8::Local<v8::Object>& constructor, | 95 const v8::Local<v8::Object>& constructor, |
82 const v8::Local<v8::Object>& prototype) | 96 const v8::Local<v8::Object>& prototype, |
97 const v8::Local<v8::Object>& connectedCallback, | |
98 const v8::Local<v8::Object>& disconnectedCallback, | |
99 const v8::Local<v8::Object>& attributeChangedCallback, | |
100 const Vector<AtomicString>& observedAttributes) | |
83 { | 101 { |
84 ScriptCustomElementDefinition* definition = | 102 ScriptCustomElementDefinition* definition = |
85 new ScriptCustomElementDefinition( | 103 new ScriptCustomElementDefinition( |
86 scriptState, | 104 scriptState, |
87 descriptor, | 105 descriptor, |
88 constructor, | 106 constructor, |
89 prototype); | 107 prototype, |
108 connectedCallback, | |
109 disconnectedCallback, | |
110 attributeChangedCallback, | |
111 observedAttributes); | |
90 | 112 |
91 // Add a constructor -> name mapping to the registry. | 113 // Add a constructor -> name mapping to the registry. |
92 v8::Local<v8::Value> nameValue = | 114 v8::Local<v8::Value> nameValue = |
93 v8String(scriptState->isolate(), descriptor.name()); | 115 v8String(scriptState->isolate(), descriptor.name()); |
94 v8::Local<v8::Map> map = | 116 v8::Local<v8::Map> map = |
95 ensureCustomElementsRegistryMap(scriptState, registry); | 117 ensureCustomElementsRegistryMap(scriptState, registry); |
96 v8CallOrCrash(map->Set(scriptState->context(), constructor, nameValue)); | 118 v8CallOrCrash(map->Set(scriptState->context(), constructor, nameValue)); |
97 // We add the prototype here to keep it alive; we make it a value | 119 // We add the prototype and callbacks here to keep them alive. We use the |
98 // not a key so authors cannot return another constructor as a | 120 // name as the key because it is unique per-registry. |
99 // prototype to overwrite a constructor in this map. We use the | 121 v8::Local<v8::Array> array = v8::Array::New(scriptState->isolate(), 4); |
yosin_UTC9
2016/06/01 06:33:33
Could you introduce enum for array index?
Or, use
kojii
2016/06/01 07:19:27
Done, not my favorite, but I can live with it.
| |
100 // name because it is unique per-registry. | 122 v8CallOrCrash(array->Set(scriptState->context(), 0, prototype)); |
101 v8CallOrCrash(map->Set(scriptState->context(), nameValue, prototype)); | 123 keepAliveIfNotEmpty(array, 1, connectedCallback, |
124 definition->m_connectedCallback, scriptState); | |
125 keepAliveIfNotEmpty(array, 2, disconnectedCallback, | |
126 definition->m_disconnectedCallback, scriptState); | |
127 keepAliveIfNotEmpty(array, 3, attributeChangedCallback, | |
128 definition->m_attributeChangedCallback, scriptState); | |
129 v8CallOrCrash(map->Set(scriptState->context(), nameValue, array)); | |
102 | 130 |
103 return definition; | 131 return definition; |
104 } | 132 } |
105 | 133 |
106 ScriptCustomElementDefinition::ScriptCustomElementDefinition( | 134 ScriptCustomElementDefinition::ScriptCustomElementDefinition( |
107 ScriptState* scriptState, | 135 ScriptState* scriptState, |
108 const CustomElementDescriptor& descriptor, | 136 const CustomElementDescriptor& descriptor, |
109 const v8::Local<v8::Object>& constructor, | 137 const v8::Local<v8::Object>& constructor, |
110 const v8::Local<v8::Object>& prototype) | 138 const v8::Local<v8::Object>& prototype, |
139 const v8::Local<v8::Object>& connectedCallback, | |
140 const v8::Local<v8::Object>& disconnectedCallback, | |
141 const v8::Local<v8::Object>& attributeChangedCallback, | |
142 const Vector<AtomicString>& observedAttributes) | |
111 : CustomElementDefinition(descriptor) | 143 : CustomElementDefinition(descriptor) |
112 , m_constructor(scriptState->isolate(), constructor) | 144 , m_constructor(scriptState->isolate(), constructor) |
113 , m_prototype(scriptState->isolate(), prototype) | 145 , m_prototype(scriptState->isolate(), prototype) |
114 { | 146 { |
115 // These objects are kept alive by references from the | 147 // These objects are kept alive by references from the |
116 // CustomElementsRegistry wrapper set up by | 148 // CustomElementsRegistry wrapper set up by |
117 // ScriptCustomElementDefinition::create. | 149 // ScriptCustomElementDefinition::create. |
118 m_constructor.setPhantom(); | 150 m_constructor.setPhantom(); |
119 m_prototype.setPhantom(); | 151 m_prototype.setPhantom(); |
152 | |
153 if (!observedAttributes.isEmpty()) { | |
yosin_UTC9
2016/06/01 06:33:33
Prefer early-return style
kojii
2016/06/01 07:19:27
Done.
| |
154 m_observedAttributes.reserveCapacityForSize(observedAttributes.size()); | |
155 for (const auto& attribute : observedAttributes) | |
156 m_observedAttributes.add(attribute); | |
157 } | |
120 } | 158 } |
121 | 159 |
122 v8::Local<v8::Object> ScriptCustomElementDefinition::constructor( | 160 v8::Local<v8::Object> ScriptCustomElementDefinition::constructor( |
123 ScriptState* scriptState) const | 161 ScriptState* scriptState) const |
124 { | 162 { |
125 DCHECK(!m_constructor.isEmpty()); | 163 DCHECK(!m_constructor.isEmpty()); |
126 return m_constructor.newLocal(scriptState->isolate()); | 164 return m_constructor.newLocal(scriptState->isolate()); |
127 } | 165 } |
128 | 166 |
129 v8::Local<v8::Object> ScriptCustomElementDefinition::prototype( | 167 v8::Local<v8::Object> ScriptCustomElementDefinition::prototype( |
130 ScriptState* scriptState) const | 168 ScriptState* scriptState) const |
131 { | 169 { |
132 DCHECK(!m_prototype.isEmpty()); | 170 DCHECK(!m_prototype.isEmpty()); |
133 return m_prototype.newLocal(scriptState->isolate()); | 171 return m_prototype.newLocal(scriptState->isolate()); |
134 } | 172 } |
135 | 173 |
136 } // namespace blink | 174 } // namespace blink |
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