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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/web_contents/java_script_dialog_commit_deferring_condition.h"
#include "base/memory/ptr_util.h"
#include "content/browser/renderer_host/frame_tree_node.h"
#include "content/browser/renderer_host/navigation_request.h"
#include "content/browser/web_contents/web_contents_impl.h"
namespace content {
// static
std::unique_ptr<CommitDeferringCondition>
JavaScriptDialogCommitDeferringCondition::MaybeCreate(
NavigationRequest& navigation_request) {
DCHECK(navigation_request.GetWebContents());
auto& web_contents =
static_cast<WebContentsImpl&>(*navigation_request.GetWebContents());
if (!web_contents.JavaScriptDialogDefersNavigations())
return nullptr;
// To prevent the deferring is used as a channel from the primary main frame
// to fenced frames, we don't defer fenced frame navigation for modal dialogs.
// Note that the modal dialog blocks the renderer and prevents it from
// processing "CommitNavigation" message, otherwise.
//
// TODO(crbug.com/40215909): Note that fenced frames cannot open modal dialogs
// so this only affects dialogs outside the fenced frame tree. If this is ever
// changed then the navigation should be deferred until the dialog is closed.
if (navigation_request.frame_tree_node()->IsInFencedFrameTree()) {
return nullptr;
}
if (navigation_request.IsInMainFrame()) {
// A dialog should not defer navigations in the non-primary main frame (e.g.
// prerendering).
if (!navigation_request.IsInPrimaryMainFrame())
return nullptr;
} else {
// Don't defer navigations that occur in a prerendering subframe since
// prerendered pages can't show dialogs.
if (navigation_request.frame_tree_node()->parent()->GetLifecycleState() ==
RenderFrameHost::LifecycleState::kPrerendering)
return nullptr;
}
bool user_navigation = navigation_request.IsInMainFrame() &&
(!navigation_request.IsRendererInitiated() ||
navigation_request.HasUserGesture());
// Don't prevent the user from navigating away from the page.
// Don't defer downloads, which don't leave the page.
if (user_navigation || navigation_request.IsDownload())
return nullptr;
return base::WrapUnique(
new JavaScriptDialogCommitDeferringCondition(navigation_request));
}
JavaScriptDialogCommitDeferringCondition::
JavaScriptDialogCommitDeferringCondition(NavigationRequest& request)
: CommitDeferringCondition(request) {}
JavaScriptDialogCommitDeferringCondition::
~JavaScriptDialogCommitDeferringCondition() = default;
CommitDeferringCondition::Result
JavaScriptDialogCommitDeferringCondition::WillCommitNavigation(
base::OnceClosure resume) {
auto* web_contents =
static_cast<WebContentsImpl*>(GetNavigationHandle().GetWebContents());
DCHECK(web_contents);
// It's possible that, depending on the order deferrals are run, the dialog
// may have been dismissed by the time we run this check. If that's the
// case, move on synchronously to the next deferral.
if (!web_contents->JavaScriptDialogDefersNavigations())
return Result::kProceed;
web_contents->NotifyOnJavaScriptDialogDismiss(std::move(resume));
return Result::kDefer;
}
const char* JavaScriptDialogCommitDeferringCondition::TraceEventName() const {
return "JavaScriptDialogCommitDeferringCondition";
}
} // namespace content
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