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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/html_viewer/html_document_application_delegate.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "components/html_viewer/global_state.h"
#include "components/html_viewer/html_document.h"
#include "components/html_viewer/html_document_oopif.h"
#include "components/html_viewer/html_viewer_switches.h"
#include "mojo/application/public/cpp/application_connection.h"
#include "mojo/application/public/cpp/application_delegate.h"
#include "mojo/application/public/cpp/connect.h"
namespace html_viewer {
namespace {
bool EnableOOPIFs() {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableOOPIF)) {
return false;
}
return true;
}
HTMLFrame* CreateHTMLFrame(HTMLFrame::CreateParams* params) {
return new HTMLFrame(params);
}
} // namespace
// ServiceConnectorQueue records all incoming service requests and processes
// them once PushRequestsTo() is called. This is useful if you need to delay
// processing incoming service requests.
class HTMLDocumentApplicationDelegate::ServiceConnectorQueue
: public mojo::ServiceConnector {
public:
ServiceConnectorQueue() {}
~ServiceConnectorQueue() override {}
void PushRequestsTo(mojo::ApplicationConnection* connection) {
ScopedVector<Request> requests;
requests_.swap(requests);
for (Request* request : requests) {
connection->GetLocalServiceProvider()->ConnectToService(
request->interface_name, request->handle.Pass());
}
}
private:
struct Request {
std::string interface_name;
mojo::ScopedMessagePipeHandle handle;
};
// mojo::ServiceConnector:
void ConnectToService(mojo::ApplicationConnection* application_connection,
const std::string& interface_name,
mojo::ScopedMessagePipeHandle handle) override {
scoped_ptr<Request> request(new Request);
request->interface_name = interface_name;
request->handle = handle.Pass();
requests_.push_back(request.Pass());
}
ScopedVector<Request> requests_;
DISALLOW_COPY_AND_ASSIGN(ServiceConnectorQueue);
};
HTMLDocumentApplicationDelegate::HTMLDocumentApplicationDelegate(
mojo::InterfaceRequest<mojo::Application> request,
mojo::URLResponsePtr response,
GlobalState* global_state,
scoped_ptr<mojo::AppRefCount> parent_app_refcount)
: app_(this,
request.Pass(),
base::Bind(&HTMLDocumentApplicationDelegate::OnTerminate,
base::Unretained(this))),
parent_app_refcount_(parent_app_refcount.Pass()),
url_(response->url),
initial_response_(response.Pass()),
global_state_(global_state),
html_frame_creation_callback_(base::Bind(CreateHTMLFrame)),
weak_factory_(this) {}
HTMLDocumentApplicationDelegate::~HTMLDocumentApplicationDelegate() {
// Deleting the documents is going to trigger a callback to
// OnHTMLDocumentDeleted() and remove from |documents_|. Copy the set so we
// don't have to worry about the set being modified out from under us.
std::set<HTMLDocument*> documents(documents_);
for (HTMLDocument* doc : documents)
doc->Destroy();
DCHECK(documents_.empty());
std::set<HTMLDocumentOOPIF*> documents2(documents2_);
for (HTMLDocumentOOPIF* doc : documents2)
doc->Destroy();
DCHECK(documents2_.empty());
}
void HTMLDocumentApplicationDelegate::SetHTMLFrameCreationCallback(
const HTMLFrameCreationCallback& callback) {
html_frame_creation_callback_ = callback;
}
// Callback from the quit closure. We key off this rather than
// ApplicationDelegate::Quit() as we don't want to shut down the messageloop
// when we quit (the messageloop is shared among multiple
// HTMLDocumentApplicationDelegates).
void HTMLDocumentApplicationDelegate::OnTerminate() {
delete this;
}
// ApplicationDelegate;
void HTMLDocumentApplicationDelegate::Initialize(mojo::ApplicationImpl* app) {
mojo::URLRequestPtr request(mojo::URLRequest::New());
request->url = mojo::String::From("mojo:network_service");
scoped_ptr<mojo::ApplicationConnection> connection =
app_.ConnectToApplication(request.Pass());
connection->ConnectToService(&url_loader_factory_);
}
bool HTMLDocumentApplicationDelegate::ConfigureIncomingConnection(
mojo::ApplicationConnection* connection) {
if (initial_response_) {
OnResponseReceived(mojo::URLLoaderPtr(), connection, nullptr,
initial_response_.Pass());
} else {
// HTMLDocument provides services, but is created asynchronously. Queue up
// requests until the HTMLDocument is created.
scoped_ptr<ServiceConnectorQueue> service_connector_queue(
new ServiceConnectorQueue);
connection->SetServiceConnector(service_connector_queue.get());
mojo::URLLoaderPtr loader;
url_loader_factory_->CreateURLLoader(GetProxy(&loader));
mojo::URLRequestPtr request(mojo::URLRequest::New());
request->url = url_;
request->auto_follow_redirects = true;
// |loader| will be passed to the OnResponseReceived method through a
// callback. Because order of evaluation is undefined, a reference to the
// raw pointer is needed.
mojo::URLLoader* raw_loader = loader.get();
raw_loader->Start(
request.Pass(),
base::Bind(&HTMLDocumentApplicationDelegate::OnResponseReceived,
weak_factory_.GetWeakPtr(), base::Passed(&loader),
connection, base::Passed(&service_connector_queue)));
}
return true;
}
void HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted(
HTMLDocument* document) {
DCHECK(documents_.count(document) > 0);
documents_.erase(document);
}
void HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted2(
HTMLDocumentOOPIF* document) {
DCHECK(documents2_.count(document) > 0);
documents2_.erase(document);
}
void HTMLDocumentApplicationDelegate::OnResponseReceived(
mojo::URLLoaderPtr loader,
mojo::ApplicationConnection* connection,
scoped_ptr<ServiceConnectorQueue> connector_queue,
mojo::URLResponsePtr response) {
// HTMLDocument is destroyed when the hosting view is destroyed, or
// explicitly from our destructor.
if (EnableOOPIFs()) {
HTMLDocumentOOPIF* document = new HTMLDocumentOOPIF(
&app_, connection, response.Pass(), global_state_,
base::Bind(&HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted2,
base::Unretained(this)),
html_frame_creation_callback_);
documents2_.insert(document);
} else {
HTMLDocument::CreateParams params(
&app_, connection, response.Pass(), global_state_,
base::Bind(&HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted,
base::Unretained(this)));
documents_.insert(new HTMLDocument(¶ms));
}
if (connector_queue) {
connector_queue->PushRequestsTo(connection);
connection->SetServiceConnector(nullptr);
}
}
} // namespace html_viewer
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