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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/bindings/api_binding_bridge.h"
#include "base/values.h"
#include "extensions/common/extension_id.h"
#include "extensions/renderer/bindings/api_binding_hooks.h"
#include "extensions/renderer/bindings/api_binding_util.h"
#include "extensions/renderer/bindings/js_runner.h"
#include "gin/converter.h"
#include "gin/object_template_builder.h"
namespace extensions {
namespace {
const char kApiObjectKey[] = "extensions::bridge::api_object";
const char kHookInterfaceKey[] = "extensions::bridge::hook_object";
v8::Local<v8::Private> GetPrivatePropertyName(v8::Isolate* isolate,
const char* key) {
return v8::Private::ForApi(isolate, gin::StringToSymbol(isolate, key));
}
} // namespace
gin::WrapperInfo APIBindingBridge::kWrapperInfo = {gin::kEmbedderNativeGin};
APIBindingBridge::APIBindingBridge(APIBindingHooks* hooks,
v8::Local<v8::Context> context,
v8::Local<v8::Value> api_object,
const ExtensionId& extension_id,
const std::string& context_type)
: extension_id_(extension_id), context_type_(context_type) {
v8::Isolate* isolate = context->GetIsolate();
v8::Local<v8::Object> wrapper = GetWrapper(isolate).ToLocalChecked();
v8::Maybe<bool> result = wrapper->SetPrivate(
context, GetPrivatePropertyName(isolate, kApiObjectKey), api_object);
if (!result.IsJust() || !result.FromJust()) {
NOTREACHED();
}
v8::Local<v8::Object> js_hook_interface = hooks->GetJSHookInterface(context);
result = wrapper->SetPrivate(context,
GetPrivatePropertyName(isolate,
kHookInterfaceKey),
js_hook_interface);
DCHECK(result.IsJust() && result.FromJust());
}
APIBindingBridge::~APIBindingBridge() = default;
gin::ObjectTemplateBuilder APIBindingBridge::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return Wrappable<APIBindingBridge>::GetObjectTemplateBuilder(isolate)
.SetMethod("registerCustomHook", &APIBindingBridge::RegisterCustomHook);
}
void APIBindingBridge::RegisterCustomHook(v8::Isolate* isolate,
v8::Local<v8::Function> function) {
// The object and arguments here are meant to match those passed to the hook
// functions in binding.js.
v8::Local<v8::Context> context = isolate->GetCurrentContext();
if (!binding::IsContextValidOrThrowError(context))
return; // Context has been invalidated.
v8::Local<v8::Object> hook_object = v8::Object::New(isolate);
v8::Local<v8::Object> wrapper;
if (!GetWrapper(isolate).ToLocal(&wrapper))
return;
v8::Local<v8::Value> hook_interface =
wrapper->GetPrivate(
context, GetPrivatePropertyName(isolate, kHookInterfaceKey))
.ToLocalChecked();
v8::Maybe<bool> result = hook_object->CreateDataProperty(
context, gin::StringToSymbol(isolate, "apiFunctions"), hook_interface);
if (!result.IsJust() || !result.FromJust())
return;
v8::Local<v8::Value> api_object =
wrapper
->GetPrivate(context, GetPrivatePropertyName(isolate, kApiObjectKey))
.ToLocalChecked();
result = hook_object->CreateDataProperty(
context, gin::StringToSymbol(isolate, "compiledApi"), api_object);
if (!result.IsJust() || !result.FromJust())
return;
result = hook_object->SetPrototype(context, v8::Null(isolate));
if (!result.IsJust() || !result.FromJust())
return;
v8::Local<v8::String> extension_id =
gin::StringToSymbol(isolate, extension_id_);
v8::Local<v8::String> context_type =
gin::StringToSymbol(isolate, context_type_);
v8::Local<v8::Value> args[] = {hook_object, extension_id, context_type};
// TODO(devlin): The context should still be valid at this point - nothing
// above should be able to invalidate it. But let's make extra sure.
// This CHECK is helping to track down https://crbug.com/819968, and should be
// removed when that's fixed.
CHECK(binding::IsContextValid(context));
JSRunner::Get(context)->RunJSFunction(function, context, args);
}
} // namespace extensions
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