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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/offline_pages/content/background_loader/background_loader_contents.h"
#include <utility>
#include "build/build_config.h"
#include "content/public/browser/media_stream_request.h"
#include "content/public/browser/web_contents.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-shared.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"
namespace background_loader {
BackgroundLoaderContents::BackgroundLoaderContents(
content::BrowserContext* browser_context)
: browser_context_(browser_context) {
// It is very important that we create the web contents with
// CreateParams::initially_hidden == false, and that we never change the
// visibility after that. If we did change it, then background throttling
// could kill the background offliner while it was running.
content::WebContents::CreateParams create_params(browser_context_);
// Background, so not user-visible.
create_params.is_never_composited = true;
web_contents_ = content::WebContents::Create(create_params);
web_contents_->SetOwnerLocationForDebug(FROM_HERE);
web_contents_->SetAudioMuted(true);
web_contents_->SetDelegate(this);
}
BackgroundLoaderContents::~BackgroundLoaderContents() = default;
void BackgroundLoaderContents::LoadPage(const GURL& url) {
web_contents_->GetController().LoadURL(
url /* url to be loaded */,
content::Referrer() /* Default referrer policy, no referring url */,
ui::PAGE_TRANSITION_LINK /* page transition type: clicked on link */,
std::string() /* extra headers */);
}
void BackgroundLoaderContents::Cancel() {
web_contents_->Close();
}
void BackgroundLoaderContents::SetDelegate(Delegate* delegate) {
delegate_ = delegate;
}
void BackgroundLoaderContents::CloseContents(content::WebContents* source) {
// Do nothing. Other pages should not be able to close a background page.
//
// TODO(crbug.com/374382473): This used to be NOTREACHED() but is reachable as
// of 2024-11-20. It should either be made not reachable (and the NOTREACHED()
// added back) or document why this should be reachable (as opposed to the
// "should not be able to close" in the comment above).
}
bool BackgroundLoaderContents::ShouldSuppressDialogs(
content::WebContents* source) {
// Dialog prompts are not actionable in the background.
return true;
}
bool BackgroundLoaderContents::ShouldFocusPageAfterCrash(
content::WebContents* source) {
// Background page should never be focused.
return false;
}
void BackgroundLoaderContents::CanDownload(
const GURL& url,
const std::string& request_method,
base::OnceCallback<void(bool)> callback) {
if (delegate_) {
delegate_->CanDownload(std::move(callback));
} else {
// Do not download anything if there's no delegate.
std::move(callback).Run(false);
}
}
bool BackgroundLoaderContents::IsWebContentsCreationOverridden(
content::RenderFrameHost* opener,
content::SiteInstance* source_site_instance,
content::mojom::WindowContainerType window_container_type,
const GURL& opener_url,
const std::string& frame_name,
const GURL& target_url) {
// Background pages should not create other webcontents/tabs.
return true;
}
content::WebContents* BackgroundLoaderContents::AddNewContents(
content::WebContents* source,
std::unique_ptr<content::WebContents> new_contents,
const GURL& target_url,
WindowOpenDisposition disposition,
const blink::mojom::WindowFeatures& window_features,
bool user_gesture,
bool* was_blocked) {
// Pop-ups should be blocked;
// background pages should not create other contents
if (was_blocked != nullptr) {
*was_blocked = true;
}
return nullptr;
}
#if BUILDFLAG(IS_ANDROID)
bool BackgroundLoaderContents::ShouldBlockMediaRequest(const GURL& url) {
// Background pages should not have access to media.
return true;
}
#endif
void BackgroundLoaderContents::RequestMediaAccessPermission(
content::WebContents* contents,
const content::MediaStreamRequest& request,
content::MediaResponseCallback callback) {
// No permissions granted, act as if dismissed.
std::move(callback).Run(
blink::mojom::StreamDevicesSet(),
blink::mojom::MediaStreamRequestResult::PERMISSION_DISMISSED,
std::unique_ptr<content::MediaStreamUI>());
}
bool BackgroundLoaderContents::CheckMediaAccessPermission(
content::RenderFrameHost* render_frame_host,
const url::Origin& security_origin,
blink::mojom::MediaStreamType type) {
return false; // No permissions granted.
}
bool BackgroundLoaderContents::ShouldAllowLazyLoad() {
return false;
}
BackgroundLoaderContents::BackgroundLoaderContents()
: browser_context_(nullptr) {
web_contents_.reset();
}
} // namespace background_loader
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