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// Copyright 2014 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/ui/blocked_content/popunder_preventer.h"
#include <set>
#include "base/stl_util.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_delegate.h"
#include "extensions/buildflags/buildflags.h"
#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "components/guest_view/browser/guest_view_base.h"
#endif
namespace {
using WebContentsSet = std::set<content::WebContents*>;
WebContentsSet BuildOpenerSet(content::WebContents* contents) {
WebContentsSet result;
while (contents) {
result.insert(contents);
contents = contents->GetFirstWebContentsInLiveOriginalOpenerChain();
}
return result;
}
} // namespace
PopunderPreventer::PopunderPreventer(content::WebContents* activating_contents)
: activating_contents_(activating_contents->GetWeakPtr()) {
WillActivateWebContents(activating_contents);
}
PopunderPreventer::~PopunderPreventer() {
for (base::WeakPtr<content::WebContents>& popup : popups_) {
if (popup && popup->GetDelegate())
popup->GetDelegate()->ActivateContents(popup.get());
}
}
void PopunderPreventer::WillActivateWebContents(
content::WebContents* activating_contents) {
DCHECK_EQ(activating_contents_.get(), activating_contents);
// If a popup is the active window, and the WebContents that is going to be
// activated shares in the opener chain of that popup, then we suspect that
// WebContents to be trying to create a popunder. Store the popup window so
// that it can be re-activated once the dialog (or whatever is causing the
// activation) is closed.
Browser* active_browser = BrowserList::GetInstance()->GetLastActive();
if (!active_browser || active_browser->is_type_normal())
return;
content::WebContents* active_popup =
active_browser->tab_strip_model()->GetActiveWebContents();
if (active_popup)
AddPotentialPopunder(active_popup);
}
void PopunderPreventer::AddPotentialPopunder(content::WebContents* popup) {
content::WebContents* top_level_activating_contents =
activating_contents_.get();
#if BUILDFLAG(ENABLE_EXTENSIONS)
// If the dialog was triggered via an PDF, get the top level web contents that
// embeds the PDF.
top_level_activating_contents =
guest_view::GuestViewBase::GetTopLevelWebContents(
top_level_activating_contents);
#endif
WebContentsSet popup_opener_set = BuildOpenerSet(popup);
WebContentsSet activator_opener_set =
BuildOpenerSet(top_level_activating_contents);
WebContentsSet common_openers = base::STLSetIntersection<WebContentsSet>(
popup_opener_set, activator_opener_set);
if (!common_openers.empty()) {
// The popup is indeed related to the WebContents wanting to activate. Store
// it, so we can focus it later.
popups_.push_back(popup->GetWeakPtr());
}
}
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