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// Copyright 2025 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/privacy_sandbox/notice/desktop_entrypoint_handlers_helper.h"
#include "chrome/browser/search/search.h"
#include "chrome/common/extensions/chrome_manifest_url_handlers.h"
#include "chrome/common/webui_url_constants.h"
#include "extensions/browser/extension_registry.h"
namespace {
#if BUILDFLAG(IS_CHROMEOS)
bool HasExtensionNtpOverride(
extensions::ExtensionRegistry* extension_registry) {
for (const auto& extension : extension_registry->enabled_extensions()) {
const auto& overrides =
extensions::URLOverrides::GetChromeURLOverrides(extension.get());
if (overrides.find(chrome::kChromeUINewTabHost) != overrides.end()) {
return true;
}
}
return false;
}
bool IsChromeControlledNtpUrl(const GURL& url) {
// Convert to origins for comparison, as any appended paths are irrelevant.
const auto ntp_origin = url::Origin::Create(url);
return ntp_origin ==
url::Origin::Create(GURL(chrome::kChromeUINewTabPageURL)) ||
ntp_origin == url::Origin::Create(
GURL(chrome::kChromeUINewTabPageThirdPartyURL));
}
#endif // BUILDFLAG(IS_CHROMEOS)
} // namespace
namespace privacy_sandbox {
// static
bool IsUrlSuitableForPrompt(const GURL& url) {
// The prompt should be shown on a limited list of pages:
// about:blank is valid.
if (url.IsAboutBlank()) {
return true;
}
// Chrome settings page is valid. The subpages aren't as most of them are not
// related to the prompt.
if (url == GURL(chrome::kChromeUISettingsURL)) {
return true;
}
// Chrome history is valid as the prompt mentions history.
if (url == GURL(chrome::kChromeUIHistoryURL)) {
return true;
}
// Only a Chrome controlled New Tab Page is valid. Third party NTP is still
// Chrome controlled, but is without Google branding.
if (url == GURL(chrome::kChromeUINewTabPageURL) ||
url == GURL(chrome::kChromeUINewTabPageThirdPartyURL)) {
return true;
}
return false;
}
#if BUILDFLAG(IS_CHROMEOS)
// static
void MaybeOpenAboutBlankOnChrome(content::NavigationHandle* navigation_handle,
Profile* profile,
content::WebContents* web_contents) {
if (web_contents->GetLastCommittedURL() == GURL(chrome::kChromeUINewTabURL)) {
const bool has_extention_override =
HasExtensionNtpOverride(extensions::ExtensionRegistry::Get(profile));
const GURL new_tab_page = search::GetNewTabPageURL(profile);
const bool is_non_chrome_controlled_ntp =
navigation_handle->GetURL() == new_tab_page &&
!IsChromeControlledNtpUrl(new_tab_page);
if (has_extention_override || is_non_chrome_controlled_ntp) {
web_contents->OpenURL(
content::OpenURLParams(GURL(url::kAboutBlankURL), content::Referrer(),
WindowOpenDisposition::NEW_FOREGROUND_TAB,
ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
/*is_renderer_initiated=*/false),
/*navigation_handle_callback=*/{});
return;
}
}
}
#endif // BUILDFLAG(IS_CHROMEOS)
} // namespace privacy_sandbox
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