114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
// Copyright (c) 2014 GitHub, Inc. All rights reserved.
|
|
// Use of this source code is governed by the MIT license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "atom/browser/api/event_emitter.h"
|
|
|
|
#include "atom/browser/api/event.h"
|
|
#include "atom/common/native_mate_converters/v8_value_converter.h"
|
|
#include "base/memory/scoped_ptr.h"
|
|
#include "base/values.h"
|
|
#include "native_mate/arguments.h"
|
|
#include "native_mate/object_template_builder.h"
|
|
|
|
#include "atom/common/node_includes.h"
|
|
|
|
namespace mate {
|
|
|
|
namespace {
|
|
|
|
v8::Persistent<v8::ObjectTemplate> event_template;
|
|
|
|
void PreventDefault(mate::Arguments* args) {
|
|
args->GetThis()->SetHiddenValue(
|
|
StringToV8(args->isolate(), "prevent_default"),
|
|
v8::True(args->isolate()));
|
|
}
|
|
|
|
// Create a pure JavaScript Event object.
|
|
v8::Local<v8::Object> CreateEventObject(v8::Isolate* isolate) {
|
|
if (event_template.IsEmpty()) {
|
|
event_template.Reset(isolate, ObjectTemplateBuilder(isolate)
|
|
.SetMethod("preventDefault", &PreventDefault)
|
|
.Build());
|
|
}
|
|
|
|
return v8::Local<v8::ObjectTemplate>::New(
|
|
isolate, event_template)->NewInstance();
|
|
}
|
|
|
|
} // namespace
|
|
|
|
EventEmitter::EventEmitter() {
|
|
}
|
|
|
|
bool EventEmitter::Emit(const base::StringPiece& name) {
|
|
return Emit(name, base::ListValue());
|
|
}
|
|
|
|
bool EventEmitter::Emit(const base::StringPiece& name,
|
|
const base::ListValue& args) {
|
|
return Emit(name, args, NULL, NULL);
|
|
}
|
|
|
|
bool EventEmitter::Emit(const base::StringPiece& name,
|
|
const base::ListValue& args,
|
|
content::WebContents* sender,
|
|
IPC::Message* message) {
|
|
v8::Isolate* isolate = v8::Isolate::GetCurrent();
|
|
v8::Locker locker(isolate);
|
|
v8::HandleScope handle_scope(isolate);
|
|
|
|
v8::Handle<v8::Context> context = isolate->GetCurrentContext();
|
|
scoped_ptr<atom::V8ValueConverter> converter(new atom::V8ValueConverter);
|
|
|
|
// v8_args = [args...];
|
|
Arguments v8_args;
|
|
v8_args.reserve(args.GetSize());
|
|
for (size_t i = 0; i < args.GetSize(); i++) {
|
|
const base::Value* value(NULL);
|
|
if (args.Get(i, &value))
|
|
v8_args.push_back(converter->ToV8Value(value, context));
|
|
}
|
|
|
|
return Emit(isolate, name, v8_args, sender, message);
|
|
}
|
|
|
|
bool EventEmitter::Emit(v8::Isolate* isolate,
|
|
const base::StringPiece& name,
|
|
Arguments args,
|
|
content::WebContents* sender,
|
|
IPC::Message* message) {
|
|
v8::Handle<v8::Object> event;
|
|
bool use_native_event = sender && message;
|
|
|
|
if (use_native_event) {
|
|
mate::Handle<mate::Event> native_event = mate::Event::Create(isolate);
|
|
native_event->SetSenderAndMessage(sender, message);
|
|
event = v8::Handle<v8::Object>::Cast(native_event.ToV8());
|
|
} else {
|
|
event = CreateEventObject(isolate);
|
|
}
|
|
|
|
// args = [name, event, args...];
|
|
args.insert(args.begin(), event);
|
|
args.insert(args.begin(), mate::StringToV8(isolate, name));
|
|
|
|
// this.emit.apply(this, args);
|
|
node::MakeCallback(isolate, GetWrapper(isolate), "emit", args.size(),
|
|
&args[0]);
|
|
|
|
if (use_native_event) {
|
|
Handle<Event> native_event;
|
|
if (ConvertFromV8(isolate, event, &native_event))
|
|
return native_event->prevent_default();
|
|
}
|
|
|
|
v8::Handle<v8::Value> prevent_default =
|
|
event->GetHiddenValue(StringToSymbol(isolate, "prevent_default"));
|
|
if (prevent_default.IsEmpty())
|
|
return false;
|
|
return prevent_default->BooleanValue();
|
|
}
|
|
|
|
} // namespace mate
|