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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 "extensions/renderer/bindings/api_event_handler.h" | 5 #include "extensions/renderer/bindings/api_event_handler.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <map> | 8 #include <map> |
9 #include <memory> | 9 #include <memory> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/bind.h" | 12 #include "base/bind.h" |
13 #include "base/logging.h" | 13 #include "base/logging.h" |
14 #include "base/memory/ptr_util.h" | 14 #include "base/memory/ptr_util.h" |
15 #include "base/supports_user_data.h" | 15 #include "base/supports_user_data.h" |
16 #include "base/values.h" | 16 #include "base/values.h" |
17 #include "content/public/child/v8_value_converter.h" | 17 #include "content/public/child/v8_value_converter.h" |
18 #include "extensions/renderer/bindings/api_event_listeners.h" | 18 #include "extensions/renderer/bindings/api_event_listeners.h" |
19 #include "extensions/renderer/bindings/event_emitter.h" | 19 #include "extensions/renderer/bindings/event_emitter.h" |
20 #include "gin/handle.h" | 20 #include "gin/handle.h" |
21 #include "gin/per_context_data.h" | 21 #include "gin/per_context_data.h" |
22 | 22 |
23 namespace extensions { | 23 namespace extensions { |
24 | 24 |
25 namespace { | 25 namespace { |
26 | 26 |
27 void DoNothingOnListenersChanged(binding::EventListenersChanged change, | 27 void DoNothingOnListenersChanged(binding::EventListenersChanged change, |
28 const base::DictionaryValue* filter, | 28 const base::DictionaryValue* filter, |
29 bool was_manual, | 29 bool update_lazy_listeners, |
30 v8::Local<v8::Context> context) {} | 30 v8::Local<v8::Context> context) {} |
31 | 31 |
32 const char kExtensionAPIEventPerContextKey[] = "extension_api_events"; | 32 const char kExtensionAPIEventPerContextKey[] = "extension_api_events"; |
33 | 33 |
34 struct APIEventPerContextData : public base::SupportsUserData::Data { | 34 struct APIEventPerContextData : public base::SupportsUserData::Data { |
35 APIEventPerContextData(v8::Isolate* isolate) : isolate(isolate) {} | 35 APIEventPerContextData(v8::Isolate* isolate) : isolate(isolate) {} |
36 ~APIEventPerContextData() override { | 36 ~APIEventPerContextData() override { |
37 DCHECK(emitters.empty()) | 37 DCHECK(emitters.empty()) |
38 << "|emitters| should have been cleared by InvalidateContext()"; | 38 << "|emitters| should have been cleared by InvalidateContext()"; |
39 DCHECK(massagers.empty()) | 39 DCHECK(massagers.empty()) |
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113 ExceptionHandler* exception_handler) | 113 ExceptionHandler* exception_handler) |
114 : call_js_(call_js), | 114 : call_js_(call_js), |
115 call_js_sync_(call_js_sync), | 115 call_js_sync_(call_js_sync), |
116 listeners_changed_(listeners_changed), | 116 listeners_changed_(listeners_changed), |
117 exception_handler_(exception_handler) {} | 117 exception_handler_(exception_handler) {} |
118 APIEventHandler::~APIEventHandler() {} | 118 APIEventHandler::~APIEventHandler() {} |
119 | 119 |
120 v8::Local<v8::Object> APIEventHandler::CreateEventInstance( | 120 v8::Local<v8::Object> APIEventHandler::CreateEventInstance( |
121 const std::string& event_name, | 121 const std::string& event_name, |
122 bool supports_filters, | 122 bool supports_filters, |
| 123 bool supports_lazy_listeners, |
123 int max_listeners, | 124 int max_listeners, |
124 bool notify_on_change, | 125 bool notify_on_change, |
125 v8::Local<v8::Context> context) { | 126 v8::Local<v8::Context> context) { |
126 // We need a context scope since gin::CreateHandle only takes the isolate | 127 // We need a context scope since gin::CreateHandle only takes the isolate |
127 // and infers the context from that. | 128 // and infers the context from that. |
128 // TODO(devlin): This could be avoided if gin::CreateHandle could take a | 129 // TODO(devlin): This could be avoided if gin::CreateHandle could take a |
129 // context directly. | 130 // context directly. |
130 v8::Context::Scope context_scope(context); | 131 v8::Context::Scope context_scope(context); |
131 | 132 |
132 APIEventPerContextData* data = GetContextData(context, true); | 133 APIEventPerContextData* data = GetContextData(context, true); |
133 DCHECK(data->emitters.find(event_name) == data->emitters.end()); | 134 DCHECK(data->emitters.find(event_name) == data->emitters.end()); |
134 | 135 |
135 APIEventListeners::ListenersUpdated updated = | 136 APIEventListeners::ListenersUpdated updated = |
136 notify_on_change ? base::Bind(listeners_changed_, event_name) | 137 notify_on_change ? base::Bind(listeners_changed_, event_name) |
137 : base::Bind(&DoNothingOnListenersChanged); | 138 : base::Bind(&DoNothingOnListenersChanged); |
138 std::unique_ptr<APIEventListeners> listeners; | 139 std::unique_ptr<APIEventListeners> listeners; |
139 if (supports_filters) { | 140 if (supports_filters) { |
140 listeners = base::MakeUnique<FilteredEventListeners>( | 141 listeners = base::MakeUnique<FilteredEventListeners>( |
141 updated, event_name, max_listeners, &event_filter_); | 142 updated, event_name, max_listeners, supports_lazy_listeners, |
| 143 &event_filter_); |
142 } else { | 144 } else { |
143 listeners = | 145 listeners = base::MakeUnique<UnfilteredEventListeners>( |
144 base::MakeUnique<UnfilteredEventListeners>(updated, max_listeners); | 146 updated, max_listeners, supports_lazy_listeners); |
145 } | 147 } |
146 | 148 |
147 gin::Handle<EventEmitter> emitter_handle = gin::CreateHandle( | 149 gin::Handle<EventEmitter> emitter_handle = gin::CreateHandle( |
148 context->GetIsolate(), | 150 context->GetIsolate(), |
149 new EventEmitter(supports_filters, std::move(listeners), call_js_, | 151 new EventEmitter(supports_filters, std::move(listeners), call_js_, |
150 call_js_sync_, exception_handler_)); | 152 call_js_sync_, exception_handler_)); |
151 CHECK(!emitter_handle.IsEmpty()); | 153 CHECK(!emitter_handle.IsEmpty()); |
152 v8::Local<v8::Value> emitter_value = emitter_handle.ToV8(); | 154 v8::Local<v8::Value> emitter_value = emitter_handle.ToV8(); |
153 CHECK(emitter_value->IsObject()); | 155 CHECK(emitter_value->IsObject()); |
154 v8::Local<v8::Object> emitter_object = | 156 v8::Local<v8::Object> emitter_object = |
155 v8::Local<v8::Object>::Cast(emitter_value); | 157 v8::Local<v8::Object>::Cast(emitter_value); |
156 data->emitters[event_name] = | 158 data->emitters[event_name] = |
157 v8::Global<v8::Object>(context->GetIsolate(), emitter_object); | 159 v8::Global<v8::Object>(context->GetIsolate(), emitter_object); |
158 | 160 |
159 return emitter_object; | 161 return emitter_object; |
160 } | 162 } |
161 | 163 |
162 v8::Local<v8::Object> APIEventHandler::CreateAnonymousEventInstance( | 164 v8::Local<v8::Object> APIEventHandler::CreateAnonymousEventInstance( |
163 v8::Local<v8::Context> context) { | 165 v8::Local<v8::Context> context) { |
164 v8::Context::Scope context_scope(context); | 166 v8::Context::Scope context_scope(context); |
165 APIEventPerContextData* data = GetContextData(context, true); | 167 APIEventPerContextData* data = GetContextData(context, true); |
166 bool supports_filters = false; | 168 bool supports_filters = false; |
167 std::unique_ptr<APIEventListeners> listeners = | 169 std::unique_ptr<APIEventListeners> listeners = |
168 base::MakeUnique<UnfilteredEventListeners>( | 170 base::MakeUnique<UnfilteredEventListeners>( |
169 base::Bind(&DoNothingOnListenersChanged), binding::kNoListenerMax); | 171 base::Bind(&DoNothingOnListenersChanged), binding::kNoListenerMax, |
| 172 false); |
170 gin::Handle<EventEmitter> emitter_handle = gin::CreateHandle( | 173 gin::Handle<EventEmitter> emitter_handle = gin::CreateHandle( |
171 context->GetIsolate(), | 174 context->GetIsolate(), |
172 new EventEmitter(supports_filters, std::move(listeners), call_js_, | 175 new EventEmitter(supports_filters, std::move(listeners), call_js_, |
173 call_js_sync_, exception_handler_)); | 176 call_js_sync_, exception_handler_)); |
174 CHECK(!emitter_handle.IsEmpty()); | 177 CHECK(!emitter_handle.IsEmpty()); |
175 v8::Local<v8::Object> emitter_object = emitter_handle.ToV8().As<v8::Object>(); | 178 v8::Local<v8::Object> emitter_object = emitter_handle.ToV8().As<v8::Object>(); |
176 data->anonymous_emitters.push_back( | 179 data->anonymous_emitters.push_back( |
177 v8::Global<v8::Object>(context->GetIsolate(), emitter_object)); | 180 v8::Global<v8::Object>(context->GetIsolate(), emitter_object)); |
178 return emitter_object; | 181 return emitter_object; |
179 } | 182 } |
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328 auto iter = data->emitters.find(event_name); | 331 auto iter = data->emitters.find(event_name); |
329 DCHECK(iter != data->emitters.end()); | 332 DCHECK(iter != data->emitters.end()); |
330 EventEmitter* emitter = nullptr; | 333 EventEmitter* emitter = nullptr; |
331 gin::Converter<EventEmitter*>::FromV8( | 334 gin::Converter<EventEmitter*>::FromV8( |
332 context->GetIsolate(), iter->second.Get(context->GetIsolate()), &emitter); | 335 context->GetIsolate(), iter->second.Get(context->GetIsolate()), &emitter); |
333 CHECK(emitter); | 336 CHECK(emitter); |
334 return emitter->GetNumListeners(); | 337 return emitter->GetNumListeners(); |
335 } | 338 } |
336 | 339 |
337 } // namespace extensions | 340 } // namespace extensions |
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