106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
// Copyright (c) 2014 GitHub, Inc. All rights reserved.
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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 <vector>
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#include "atom/browser/api/event.h"
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#include "atom/common/native_mate_converters/v8_value_converter.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/values.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()->SetHiddenValue(
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StringToV8(args->isolate(), "prevent_default"),
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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::Emit(const base::StringPiece& name) {
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return Emit(name, base::ListValue());
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}
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bool EventEmitter::Emit(const base::StringPiece& name,
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const base::ListValue& args) {
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return Emit(name, args, NULL, NULL);
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}
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bool EventEmitter::Emit(const base::StringPiece& name,
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const base::ListValue& args,
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content::WebContents* sender,
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IPC::Message* message) {
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v8::Isolate* isolate = v8::Isolate::GetCurrent();
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v8::Locker locker(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Handle<v8::Context> context = isolate->GetCurrentContext();
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scoped_ptr<atom::V8ValueConverter> converter(new atom::V8ValueConverter);
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v8::Handle<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::Handle<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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// v8_args = [name, event, args...];
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std::vector<v8::Handle<v8::Value>> v8_args;
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v8_args.reserve(args.GetSize() + 2);
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v8_args.push_back(mate::StringToV8(isolate, name));
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v8_args.push_back(event);
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for (size_t i = 0; i < args.GetSize(); i++) {
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const base::Value* value(NULL);
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if (args.Get(i, &value))
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v8_args.push_back(converter->ToV8Value(value, context));
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}
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// this.emit.apply(this, v8_args);
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node::MakeCallback(isolate, GetWrapper(isolate), "emit", v8_args.size(),
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&v8_args[0]);
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if (use_native_event) {
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Handle<Event> native_event;
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if (ConvertFromV8(isolate, event, &native_event))
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return native_event->prevent_default();
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}
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v8::Handle<v8::Value> prevent_default =
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event->GetHiddenValue(StringToSymbol(isolate, "prevent_default"));
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if (prevent_default.IsEmpty())
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return false;
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return prevent_default->BooleanValue();
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}
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} // namespace mate
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