electron/atom/browser/api/event_emitter.cc

88 строки
2.8 KiB
C++

// Copyright (c) 2014 GitHub, Inc.
// 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 "content/public/browser/render_frame_host.h"
#include "native_mate/arguments.h"
#include "native_mate/dictionary.h"
#include "native_mate/object_template_builder.h"
#include "ui/events/event_constants.h"
#include "atom/common/node_includes.h"
namespace mate {
namespace {
v8::Persistent<v8::ObjectTemplate> event_template;
void PreventDefault(mate::Arguments* args) {
mate::Dictionary self(args->isolate(), args->GetThis());
self.Set("defaultPrevented", true);
}
// Create a pure JavaScript Event object.
v8::Local<v8::Object> CreateEventObject(v8::Isolate* isolate) {
if (event_template.IsEmpty()) {
event_template.Reset(
isolate,
ObjectTemplateBuilder(isolate, v8::ObjectTemplate::New(isolate))
.SetMethod("preventDefault", &PreventDefault)
.Build());
}
return v8::Local<v8::ObjectTemplate>::New(isolate, event_template)
->NewInstance(isolate->GetCurrentContext())
.ToLocalChecked();
}
} // namespace
namespace internal {
v8::Local<v8::Object> CreateJSEvent(v8::Isolate* isolate,
v8::Local<v8::Object> object,
content::RenderFrameHost* sender,
IPC::Message* message) {
v8::Local<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::Local<v8::Object>::Cast(native_event.ToV8());
} else {
event = CreateEventObject(isolate);
}
mate::Dictionary dict(isolate, event);
dict.Set("sender", object);
if (sender)
dict.Set("frameId", sender->GetRoutingID());
return event;
}
v8::Local<v8::Object> CreateCustomEvent(v8::Isolate* isolate,
v8::Local<v8::Object> object,
v8::Local<v8::Object> custom_event) {
v8::Local<v8::Object> event = CreateEventObject(isolate);
(void)event->SetPrototype(custom_event->CreationContext(), custom_event);
mate::Dictionary(isolate, event).Set("sender", object);
return event;
}
v8::Local<v8::Object> CreateEventFromFlags(v8::Isolate* isolate, int flags) {
mate::Dictionary obj = mate::Dictionary::CreateEmpty(isolate);
obj.Set("shiftKey", static_cast<bool>(flags & ui::EF_SHIFT_DOWN));
obj.Set("ctrlKey", static_cast<bool>(flags & ui::EF_CONTROL_DOWN));
obj.Set("altKey", static_cast<bool>(flags & ui::EF_ALT_DOWN));
obj.Set("metaKey", static_cast<bool>(flags & ui::EF_COMMAND_DOWN));
return obj.GetHandle();
}
} // namespace internal
} // namespace mate