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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/browser_switcher/browser_switcher_navigation_throttle.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/task/single_thread_task_runner.h"
#include "chrome/browser/browser_switcher/alternative_browser_driver.h"
#include "chrome/browser/browser_switcher/browser_switcher_service.h"
#include "chrome/browser/browser_switcher/browser_switcher_service_factory.h"
#include "chrome/browser/browser_switcher/browser_switcher_sitelist.h"
#include "chrome/browser/preloading/prefetch/no_state_prefetch/chrome_no_state_prefetch_contents_delegate.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/webui_url_constants.h"
#include "components/navigation_interception/intercept_navigation_throttle.h"
#include "components/no_state_prefetch/browser/no_state_prefetch_contents.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/web_contents.h"
#include "net/base/url_util.h"
namespace browser_switcher {
namespace {
// Open 'chrome://browser-switch/?url=...' in the current tab.
void OpenBrowserSwitchPage(base::WeakPtr<content::WebContents> web_contents,
const GURL& url,
ui::PageTransition transition_type) {
if (!web_contents)
return;
GURL about_url(chrome::kChromeUIBrowserSwitchURL);
about_url = net::AppendQueryParameter(about_url, "url", url.spec());
content::OpenURLParams params(about_url, content::Referrer(),
WindowOpenDisposition::CURRENT_TAB,
transition_type, false);
web_contents->OpenURL(params);
}
bool MaybeLaunchAlternativeBrowser(
content::NavigationHandle* navigation_handle) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
BrowserSwitcherService* service =
BrowserSwitcherServiceFactory::GetForBrowserContext(
navigation_handle->GetWebContents()->GetBrowserContext());
if (!service)
return false;
const GURL& url = navigation_handle->GetURL();
bool should_switch = service->sitelist()->ShouldSwitch(url);
if (!should_switch)
return false;
// Redirect top-level navigations only. This excludes iframes and webviews
// in particular. Since we can only navigate a guest after attaching to the
// outer WebContents, this check works for both guests and portals.
if (navigation_handle->GetWebContents()->GetOuterWebContents())
return false;
// If no-state prefetching, don't launch the alternative browser but abort the
// navigation.
prerender::NoStatePrefetchContents* no_state_prefetch_contents =
prerender::ChromeNoStatePrefetchContentsDelegate::FromWebContents(
navigation_handle->GetWebContents());
if (no_state_prefetch_contents) {
no_state_prefetch_contents->Destroy(prerender::FINAL_STATUS_BROWSER_SWITCH);
return true;
}
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&OpenBrowserSwitchPage,
navigation_handle->GetWebContents()->GetWeakPtr(), url,
navigation_handle->GetPageTransition()));
return true;
}
} // namespace
// static
std::unique_ptr<content::NavigationThrottle>
BrowserSwitcherNavigationThrottle::MaybeCreateThrottleFor(
content::NavigationHandle* navigation) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
content::BrowserContext* browser_context =
navigation->GetWebContents()->GetBrowserContext();
Profile* profile = Profile::FromBrowserContext(browser_context);
if (!profile->IsRegularProfile())
return nullptr;
if (!navigation->IsInPrimaryMainFrame())
return nullptr;
return std::make_unique<navigation_interception::InterceptNavigationThrottle>(
navigation, base::BindRepeating(&MaybeLaunchAlternativeBrowser),
navigation_interception::SynchronyMode::kSync);
}
} // namespace browser_switcher
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