1 /*
2 * Copyright (C) 2013 Google Inc. 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
31 #include "config.h"
32 #include "bindings/core/v8/V8CustomElementLifecycleCallbacks.h"
33
34 #include "bindings/core/v8/CustomElementBinding.h"
35 #include "bindings/core/v8/DOMDataStore.h"
36 #include "bindings/core/v8/ScriptController.h"
37 #include "bindings/core/v8/V8Binding.h"
38 #include "bindings/core/v8/V8Element.h"
39 #include "bindings/core/v8/V8HiddenValue.h"
40 #include "bindings/core/v8/V8PerContextData.h"
41 #include "core/dom/ExecutionContext.h"
42 #include "core/inspector/InspectorInstrumentation.h"
43 #include "wtf/PassOwnPtr.h"
44
45 namespace blink {
46
47 #define CALLBACK_LIST(V) \
48 V(created, CreatedCallback) \
49 V(attached, AttachedCallback) \
50 V(detached, DetachedCallback) \
51 V(attributeChanged, AttributeChangedCallback)
52
create(ScriptState * scriptState,v8::Handle<v8::Object> prototype,v8::Handle<v8::Function> created,v8::Handle<v8::Function> attached,v8::Handle<v8::Function> detached,v8::Handle<v8::Function> attributeChanged)53 PassRefPtr<V8CustomElementLifecycleCallbacks> V8CustomElementLifecycleCallbacks::create(ScriptState* scriptState, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> attached, v8::Handle<v8::Function> detached, v8::Handle<v8::Function> attributeChanged)
54 {
55 v8::Isolate* isolate = scriptState->isolate();
56 // A given object can only be used as a Custom Element prototype
57 // once; see customElementIsInterfacePrototypeObject
58 #define SET_HIDDEN_VALUE(Value, Name) \
59 ASSERT(V8HiddenValue::getHiddenValue(isolate, prototype, V8HiddenValue::customElement##Name(isolate)).IsEmpty()); \
60 if (!Value.IsEmpty()) \
61 V8HiddenValue::setHiddenValue(isolate, prototype, V8HiddenValue::customElement##Name(isolate), Value);
62
63 CALLBACK_LIST(SET_HIDDEN_VALUE)
64 #undef SET_HIDDEN_VALUE
65
66 return adoptRef(new V8CustomElementLifecycleCallbacks(scriptState, prototype, created, attached, detached, attributeChanged));
67 }
68
flagSet(v8::Handle<v8::Function> attached,v8::Handle<v8::Function> detached,v8::Handle<v8::Function> attributeChanged)69 static CustomElementLifecycleCallbacks::CallbackType flagSet(v8::Handle<v8::Function> attached, v8::Handle<v8::Function> detached, v8::Handle<v8::Function> attributeChanged)
70 {
71 // V8 Custom Elements always run created to swizzle prototypes.
72 int flags = CustomElementLifecycleCallbacks::CreatedCallback;
73
74 if (!attached.IsEmpty())
75 flags |= CustomElementLifecycleCallbacks::AttachedCallback;
76
77 if (!detached.IsEmpty())
78 flags |= CustomElementLifecycleCallbacks::DetachedCallback;
79
80 if (!attributeChanged.IsEmpty())
81 flags |= CustomElementLifecycleCallbacks::AttributeChangedCallback;
82
83 return CustomElementLifecycleCallbacks::CallbackType(flags);
84 }
85
86 template <typename T>
weakCallback(const v8::WeakCallbackData<T,ScopedPersistent<T>> & data)87 static void weakCallback(const v8::WeakCallbackData<T, ScopedPersistent<T> >& data)
88 {
89 data.GetParameter()->clear();
90 }
91
V8CustomElementLifecycleCallbacks(ScriptState * scriptState,v8::Handle<v8::Object> prototype,v8::Handle<v8::Function> created,v8::Handle<v8::Function> attached,v8::Handle<v8::Function> detached,v8::Handle<v8::Function> attributeChanged)92 V8CustomElementLifecycleCallbacks::V8CustomElementLifecycleCallbacks(ScriptState* scriptState, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> attached, v8::Handle<v8::Function> detached, v8::Handle<v8::Function> attributeChanged)
93 : CustomElementLifecycleCallbacks(flagSet(attached, detached, attributeChanged))
94 , ContextLifecycleObserver(scriptState->executionContext())
95 , m_owner(0)
96 , m_scriptState(scriptState)
97 , m_prototype(scriptState->isolate(), prototype)
98 , m_created(scriptState->isolate(), created)
99 , m_attached(scriptState->isolate(), attached)
100 , m_detached(scriptState->isolate(), detached)
101 , m_attributeChanged(scriptState->isolate(), attributeChanged)
102 {
103 m_prototype.setWeak(&m_prototype, weakCallback<v8::Object>);
104
105 #define MAKE_WEAK(Var, _) \
106 if (!m_##Var.isEmpty()) \
107 m_##Var.setWeak(&m_##Var, weakCallback<v8::Function>);
108
109 CALLBACK_LIST(MAKE_WEAK)
110 #undef MAKE_WEAK
111 }
112
creationContextData()113 V8PerContextData* V8CustomElementLifecycleCallbacks::creationContextData()
114 {
115 if (!executionContext())
116 return 0;
117
118 v8::Handle<v8::Context> context = m_scriptState->context();
119 if (context.IsEmpty())
120 return 0;
121
122 return V8PerContextData::from(context);
123 }
124
~V8CustomElementLifecycleCallbacks()125 V8CustomElementLifecycleCallbacks::~V8CustomElementLifecycleCallbacks()
126 {
127 if (!m_owner)
128 return;
129
130 v8::HandleScope handleScope(m_scriptState->isolate());
131 if (V8PerContextData* perContextData = creationContextData())
132 perContextData->clearCustomElementBinding(m_owner);
133 }
134
setBinding(CustomElementDefinition * owner,PassOwnPtr<CustomElementBinding> binding)135 bool V8CustomElementLifecycleCallbacks::setBinding(CustomElementDefinition* owner, PassOwnPtr<CustomElementBinding> binding)
136 {
137 ASSERT(!m_owner);
138
139 V8PerContextData* perContextData = creationContextData();
140 if (!perContextData)
141 return false;
142
143 m_owner = owner;
144
145 // Bindings retrieve the prototype when needed from per-context data.
146 perContextData->addCustomElementBinding(owner, binding);
147
148 return true;
149 }
150
created(Element * element)151 void V8CustomElementLifecycleCallbacks::created(Element* element)
152 {
153 // FIXME: callbacks while paused should be queued up for execution to
154 // continue then be delivered in order rather than delivered immediately.
155 // Bug 329665 tracks similar behavior for other synchronous events.
156 if (!executionContext() || executionContext()->activeDOMObjectsAreStopped())
157 return;
158
159 element->setCustomElementState(Element::Upgraded);
160
161 if (m_scriptState->contextIsValid())
162 return;
163 ScriptState::Scope scope(m_scriptState.get());
164 v8::Isolate* isolate = m_scriptState->isolate();
165 v8::Handle<v8::Context> context = m_scriptState->context();
166 v8::Handle<v8::Object> receiver = m_scriptState->world().domDataStore().get<V8Element>(element, isolate);
167 if (!receiver.IsEmpty()) {
168 // Swizzle the prototype of the existing wrapper. We don't need to
169 // worry about non-existent wrappers; they will get the right
170 // prototype when wrapped.
171 v8::Handle<v8::Object> prototype = m_prototype.newLocal(isolate);
172 if (prototype.IsEmpty())
173 return;
174 receiver->SetPrototype(prototype);
175 }
176
177 v8::Handle<v8::Function> callback = m_created.newLocal(isolate);
178 if (callback.IsEmpty())
179 return;
180
181 if (receiver.IsEmpty())
182 receiver = toV8(element, context->Global(), isolate).As<v8::Object>();
183
184 ASSERT(!receiver.IsEmpty());
185
186 InspectorInstrumentation::willExecuteCustomElementCallback(element);
187
188 v8::TryCatch exceptionCatcher;
189 exceptionCatcher.SetVerbose(true);
190 ScriptController::callFunction(executionContext(), callback, receiver, 0, 0, isolate);
191 }
192
attached(Element * element)193 void V8CustomElementLifecycleCallbacks::attached(Element* element)
194 {
195 call(m_attached, element);
196 }
197
detached(Element * element)198 void V8CustomElementLifecycleCallbacks::detached(Element* element)
199 {
200 call(m_detached, element);
201 }
202
attributeChanged(Element * element,const AtomicString & name,const AtomicString & oldValue,const AtomicString & newValue)203 void V8CustomElementLifecycleCallbacks::attributeChanged(Element* element, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue)
204 {
205 // FIXME: callbacks while paused should be queued up for execution to
206 // continue then be delivered in order rather than delivered immediately.
207 // Bug 329665 tracks similar behavior for other synchronous events.
208 if (!executionContext() || executionContext()->activeDOMObjectsAreStopped())
209 return;
210
211 if (m_scriptState->contextIsValid())
212 return;
213 ScriptState::Scope scope(m_scriptState.get());
214 v8::Isolate* isolate = m_scriptState->isolate();
215 v8::Handle<v8::Context> context = m_scriptState->context();
216 v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>();
217 ASSERT(!receiver.IsEmpty());
218
219 v8::Handle<v8::Function> callback = m_attributeChanged.newLocal(isolate);
220 if (callback.IsEmpty())
221 return;
222
223 v8::Handle<v8::Value> argv[] = {
224 v8String(isolate, name),
225 oldValue.isNull() ? v8::Handle<v8::Value>(v8::Null(isolate)) : v8::Handle<v8::Value>(v8String(isolate, oldValue)),
226 newValue.isNull() ? v8::Handle<v8::Value>(v8::Null(isolate)) : v8::Handle<v8::Value>(v8String(isolate, newValue))
227 };
228
229 InspectorInstrumentation::willExecuteCustomElementCallback(element);
230
231 v8::TryCatch exceptionCatcher;
232 exceptionCatcher.SetVerbose(true);
233 ScriptController::callFunction(executionContext(), callback, receiver, WTF_ARRAY_LENGTH(argv), argv, isolate);
234 }
235
call(const ScopedPersistent<v8::Function> & weakCallback,Element * element)236 void V8CustomElementLifecycleCallbacks::call(const ScopedPersistent<v8::Function>& weakCallback, Element* element)
237 {
238 // FIXME: callbacks while paused should be queued up for execution to
239 // continue then be delivered in order rather than delivered immediately.
240 // Bug 329665 tracks similar behavior for other synchronous events.
241 if (!executionContext() || executionContext()->activeDOMObjectsAreStopped())
242 return;
243
244 if (m_scriptState->contextIsValid())
245 return;
246 ScriptState::Scope scope(m_scriptState.get());
247 v8::Isolate* isolate = m_scriptState->isolate();
248 v8::Handle<v8::Context> context = m_scriptState->context();
249 v8::Handle<v8::Function> callback = weakCallback.newLocal(isolate);
250 if (callback.IsEmpty())
251 return;
252
253 v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>();
254 ASSERT(!receiver.IsEmpty());
255
256 InspectorInstrumentation::willExecuteCustomElementCallback(element);
257
258 v8::TryCatch exceptionCatcher;
259 exceptionCatcher.SetVerbose(true);
260 ScriptController::callFunction(executionContext(), callback, receiver, 0, 0, isolate);
261 }
262
263 } // namespace blink
264