mirror of https://github.com/nodejs/node.git
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
// Copyright 2009 Ryan Dahl <ry@tinyclouds.org>
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#include <node_events.h>
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#include <node.h>
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namespace node {
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using namespace v8;
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Persistent<FunctionTemplate> EventEmitter::constructor_template;
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static Persistent<String> events_symbol;
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void EventEmitter::Initialize(Local<FunctionTemplate> ctemplate) {
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HandleScope scope;
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constructor_template = Persistent<FunctionTemplate>::New(ctemplate);
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constructor_template->SetClassName(String::NewSymbol("EventEmitter"));
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events_symbol = NODE_PSYMBOL("_events");
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// All other prototype methods are defined in events.js
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}
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bool EventEmitter::Emit(Handle<String> event, int argc, Handle<Value> argv[]) {
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HandleScope scope;
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// HandleScope not needed here because only called from one of the two
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// functions below
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Local<Value> events_v = handle_->Get(events_symbol);
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if (!events_v->IsObject()) return false;
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Local<Object> events = events_v->ToObject();
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Local<Value> listeners_v = events->Get(event);
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TryCatch try_catch;
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if (listeners_v->IsFunction()) {
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// Optimized one-listener case
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Local<Function> listener = Local<Function>::Cast(listeners_v);
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listener->Call(handle_, argc, argv);
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if (try_catch.HasCaught()) {
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FatalException(try_catch);
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return false;
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}
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} else if (listeners_v->IsArray()) {
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Local<Array> listeners = Local<Array>::Cast(listeners_v->ToObject()->Clone());
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for (uint32_t i = 0; i < listeners->Length(); i++) {
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Local<Value> listener_v = listeners->Get(i);
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if (!listener_v->IsFunction()) continue;
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Local<Function> listener = Local<Function>::Cast(listener_v);
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listener->Call(handle_, argc, argv);
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if (try_catch.HasCaught()) {
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FatalException(try_catch);
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return false;
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}
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}
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} else {
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return false;
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}
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return true;
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}
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} // namespace node
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