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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 "components/html_viewer/global_state.h"
#include "components/html_viewer/html_document.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 {
// 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_factory_(this),
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*> documents2(documents2_);
for (HTMLDocument* doc : documents2)
doc->Destroy();
DCHECK(documents2_.empty());
}
// 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(nullptr, mojo::URLLoaderPtr(), connection, nullptr,
initial_response_.Pass());
} else if (url_ == "about:blank") {
// This is a little unfortunate. At the browser side, when starting a new
// app for "about:blank", the application manager uses
// mojo::runner::AboutFetcher to construct a response for "about:blank".
// However, when an app for "about:blank" already exists, it is reused and
// we end up here. We cannot fetch the URL using mojo::URLLoader because it
// is not an actual Web resource.
// TODO(yzshen): find out a better approach.
mojo::URLResponsePtr response(mojo::URLResponse::New());
response->url = url_;
response->status_code = 200;
response->mime_type = "text/html";
OnResponseReceived(nullptr, mojo::URLLoaderPtr(), connection, nullptr,
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();
// The app needs to stay alive while waiting for the response to be
// available.
scoped_ptr<mojo::AppRefCount> app_retainer(
app_.app_lifetime_helper()->CreateAppRefCount());
raw_loader->Start(
request.Pass(),
base::Bind(&HTMLDocumentApplicationDelegate::OnResponseReceived,
weak_factory_.GetWeakPtr(), base::Passed(&app_retainer),
base::Passed(&loader), connection,
base::Passed(&service_connector_queue)));
}
return true;
}
void HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted2(
HTMLDocument* document) {
DCHECK(documents2_.count(document) > 0);
documents2_.erase(document);
}
void HTMLDocumentApplicationDelegate::OnResponseReceived(
scoped_ptr<mojo::AppRefCount> app_refcount,
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.
HTMLDocument* document = new HTMLDocument(
&app_, connection, response.Pass(), global_state_,
base::Bind(&HTMLDocumentApplicationDelegate::OnHTMLDocumentDeleted2,
base::Unretained(this)),
html_factory_);
documents2_.insert(document);
if (connector_queue) {
connector_queue->PushRequestsTo(connection);
connection->SetServiceConnector(nullptr);
}
}
HTMLFrame* HTMLDocumentApplicationDelegate::CreateHTMLFrame(
HTMLFrame::CreateParams* params) {
return new HTMLFrame(params);
}
HTMLWidgetRootLocal* HTMLDocumentApplicationDelegate::CreateHTMLWidgetRootLocal(
HTMLWidgetRootLocal::CreateParams* params) {
return new HTMLWidgetRootLocal(params);
}
} // namespace html_viewer
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