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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/glic/media/glic_media_page_cache.h"
#include "base/check_op.h"
#include "content/public/browser/web_contents.h"
namespace glic {
GlicMediaPageCache::Entry::Entry() = default;
GlicMediaPageCache::Entry::~Entry() {
if (cache_) {
cache_->RemoveFromCache(this);
}
}
void GlicMediaPageCache::Entry::OnCached(GlicMediaPageCache* cache) {
CHECK_EQ(cache_, nullptr);
cache_ = cache;
}
void GlicMediaPageCache::Entry::OnUncached() {
CHECK(cache_);
cache_ = nullptr;
}
GlicMediaPageCache::GlicMediaPageCache() = default;
GlicMediaPageCache::~GlicMediaPageCache() {
while (!cache_.empty()) {
RemoveFromCache(static_cast<Entry*>(cache_.head()));
}
}
void GlicMediaPageCache::PlaceAtFront(Entry* entry) {
// It's okay if `entry` is in our cache already, or not on any cache. It is
// not okay if it is on some other cache.
CHECK(entry->cache() == nullptr || entry->cache() == this);
if (entry->next()) {
RemoveFromCache(entry);
}
entry->InsertBefore(cache_.head());
if (entry->cache() == nullptr) {
entry->OnCached(this);
}
}
void GlicMediaPageCache::RemoveFromCache(Entry* entry) {
CHECK(entry->next());
CHECK_EQ(entry->cache(), this);
entry->RemoveFromList();
entry->OnUncached();
}
} // namespace glic
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