content/browser/appcache/appcache_navigation_handle.cc

// Copyright 2016 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 "content/browser/appcache/appcache_navigation_handle.h"

#include "base/bind.h"
#include "content/browser/appcache/appcache_navigation_handle_core.h"
#include "content/browser/appcache/chrome_appcache_service.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/appcache_info.h"

namespace {
// PlzNavigate: Used to generate the host id for a navigation initiated by the
// browser. Starts at -2 and keeps going down.
static int g_next_appcache_host_id = -1;
}

namespace content {

AppCacheNavigationHandle::AppCacheNavigationHandle(
    ChromeAppCacheService* appcache_service)
    : appcache_host_id_(kAppCacheNoHostId),
      core_(nullptr),
      weak_factory_(this) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  appcache_host_id_ = g_next_appcache_host_id--;
  core_.reset(new AppCacheNavigationHandleCore(
      weak_factory_.GetWeakPtr(), appcache_service, appcache_host_id_));
  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                          base::Bind(&AppCacheNavigationHandleCore::Initialize,
                                     base::Unretained(core_.get())));
}

AppCacheNavigationHandle::~AppCacheNavigationHandle() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  // Delete the AppCacheNavigationHandleCore on the IO thread.
  BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, core_.release());
}

}  // namespace content