68 lines
2 KiB
C++
68 lines
2 KiB
C++
// Copyright (c) 2014 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/api/event_emitter.h"
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#include "atom/browser/api/event.h"
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#include "native_mate/arguments.h"
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#include "native_mate/object_template_builder.h"
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#include "atom/common/node_includes.h"
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namespace mate {
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namespace {
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v8::Persistent<v8::ObjectTemplate> event_template;
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void PreventDefault(mate::Arguments* args) {
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args->GetThis()->Set(StringToV8(args->isolate(), "defaultPrevented"),
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v8::True(args->isolate()));
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}
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// Create a pure JavaScript Event object.
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v8::Local<v8::Object> CreateEventObject(v8::Isolate* isolate) {
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if (event_template.IsEmpty()) {
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event_template.Reset(isolate, ObjectTemplateBuilder(isolate)
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.SetMethod("preventDefault", &PreventDefault)
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.Build());
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}
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return v8::Local<v8::ObjectTemplate>::New(
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isolate, event_template)->NewInstance();
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}
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} // namespace
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EventEmitter::EventEmitter() {
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}
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bool EventEmitter::CallEmit(v8::Isolate* isolate,
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const base::StringPiece& name,
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content::WebContents* sender,
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IPC::Message* message,
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ValueArray args) {
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v8::Local<v8::Object> event;
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bool use_native_event = sender && message;
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if (use_native_event) {
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mate::Handle<mate::Event> native_event = mate::Event::Create(isolate);
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native_event->SetSenderAndMessage(sender, message);
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event = v8::Local<v8::Object>::Cast(native_event.ToV8());
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} else {
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event = CreateEventObject(isolate);
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}
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// args = [name, event, args...];
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args.insert(args.begin(), event);
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args.insert(args.begin(), mate::StringToV8(isolate, name));
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// this.emit.apply(this, args);
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node::MakeCallback(isolate, GetWrapper(isolate), "emit", args.size(),
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&args[0]);
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return event->Get(StringToV8(isolate, "defaultPrevented"))->BooleanValue();
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}
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} // namespace mate
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