| // 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_BACK_FORWARD_CACHE_LOADER_HELPER_IMPL_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_BACK_FORWARD_CACHE_LOADER_HELPER_IMPL_H_ |
| |
| #include <memory> |
| |
| #include "third_party/blink/public/mojom/frame/back_forward_cache_controller.mojom-blink.h" |
| #include "third_party/blink/public/mojom/navigation/renderer_eviction_reason.mojom-blink.h" |
| #include "third_party/blink/renderer/platform/heap/garbage_collected.h" |
| #include "third_party/blink/renderer/platform/heap/member.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/back_forward_cache_loader_helper.h" |
| |
| namespace blink { |
| |
| class SourceLocation; |
| |
| class BackForwardCacheLoaderHelperImpl : public BackForwardCacheLoaderHelper { |
| public: |
| // A delegate to notify the loader states to the back-forward cache. |
| class Delegate : public GarbageCollectedMixin { |
| public: |
| virtual ~Delegate() = default; |
| |
| // Triggers eviction of this delegate by notifying the browser side. |
| // We want to capture the source location only when the eviction reason is |
| // JavaScript execution, and this delegate shouldn't be called for |
| // JavaScript execution. Therefore, nullptr should be passed as |
| // source_location. |
| virtual void EvictFromBackForwardCache( |
| mojom::blink::RendererEvictionReason reason, |
| std::unique_ptr<SourceLocation> source_location) = 0; |
| |
| // Called when a network request buffered an additional `num_bytes` while |
| // the delegate is in back-forward cache. Updates the total amount of bytes |
| // buffered for back-forward cache in the delegate and in the process. Note |
| // that `num_bytes` is the amount of additional bytes that are newly |
| // buffered, on top of any previously buffered bytes for this delegate. |
| virtual void DidBufferLoadWhileInBackForwardCache( |
| bool update_process_wide_count, |
| size_t num_bytes) = 0; |
| }; |
| |
| explicit BackForwardCacheLoaderHelperImpl(Delegate& delegate); |
| |
| void EvictFromBackForwardCache( |
| mojom::blink::RendererEvictionReason reason) override; |
| void DidBufferLoadWhileInBackForwardCache(bool update_process_wide_count, |
| size_t num_bytes) override; |
| void Detach() override; |
| void Trace(Visitor*) const override; |
| |
| private: |
| WeakMember<Delegate> delegate_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_BACK_FORWARD_CACHE_LOADER_HELPER_IMPL_H_ |