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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/renderer_host/stored_page.h"
#include "base/containers/contains.h"
#include "base/trace_event/typed_macros.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/renderer_host/render_frame_proxy_host.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
namespace content {
namespace {
using perfetto::protos::pbzero::ChromeTrackEvent;
}
StoredPage::StoredPage(std::unique_ptr<RenderFrameHostImpl> rfh,
RenderFrameProxyHostMap proxy_hosts,
RenderViewHostImplSafeRefSet render_view_hosts)
: render_frame_host_(std::move(rfh)),
proxy_hosts_(std::move(proxy_hosts)),
render_view_hosts_(std::move(render_view_hosts)) {
for (const auto& rvh : render_view_hosts_) {
rvh->site_instance_group()->AddObserver(this);
}
for (const auto& pair : proxy_hosts_) {
TRACE_EVENT_INSTANT("navigation", "StoredPage::StoredPage_Proxy",
ChromeTrackEvent::kRenderFrameProxyHost, *pair.second);
}
}
StoredPage::~StoredPage() {
if (!cleared_observers_)
ClearAllObservers();
}
void StoredPage::SetDelegate(Delegate* delegate) {
delegate_ = delegate;
}
void StoredPage::ClearAllObservers() {
DCHECK(!cleared_observers_);
cleared_observers_ = true;
for (const auto& rvh : render_view_hosts_) {
rvh->site_instance_group()->RemoveObserver(this);
}
}
void StoredPage::ActiveFrameCountIsZero(
SiteInstanceGroup* site_instance_group) {
// It is possible that this class was constructed with `RenderViewHost`
// that may disappear when a outstanding subframe navigation completes.
// `ActivateFrameCountIsZero` will be called before that happens so we detect
// that a `RenderViewHost` is going to be destroyed and remove it from our
// lists. Likewise if a `SiteInstanceGroup` has zero frames it means that we
// don't require any proxies to it anymore.
auto site_instance_group_id = site_instance_group->GetId();
// Remove any proxies.
auto proxy_iter = proxy_hosts_.find(site_instance_group_id);
if (proxy_iter != proxy_hosts_.end())
proxy_hosts_.erase(proxy_iter);
for (auto iter = render_view_hosts_.begin();
iter != render_view_hosts_.end();) {
if ((*iter)->site_instance_group() == site_instance_group) {
if (delegate_)
delegate_->RenderViewHostNoLongerStored(&*(*iter));
iter = render_view_hosts_.erase(iter);
} else {
++iter;
}
}
site_instance_group->RemoveObserver(this);
}
void StoredPage::PrepareToRestore() {
ClearAllObservers();
}
std::unique_ptr<RenderFrameHostImpl> StoredPage::TakeRenderFrameHost() {
return std::move(render_frame_host_);
}
StoredPage::RenderFrameProxyHostMap StoredPage::TakeProxyHosts() {
DCHECK(cleared_observers_);
return std::move(proxy_hosts_);
}
StoredPage::RenderViewHostImplSafeRefSet StoredPage::TakeRenderViewHosts() {
DCHECK(cleared_observers_);
return std::move(render_view_hosts_);
}
void StoredPage::SetViewTransitionState(
std::optional<blink::ViewTransitionState> view_transition_state) {
DCHECK(!view_transition_state_);
view_transition_state_ = std::move(view_transition_state);
}
std::optional<blink::ViewTransitionState>
StoredPage::TakeViewTransitionState() {
return std::exchange(view_transition_state_, {});
}
} // namespace content
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