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15c587404c
Follow up from #21436 . That PR works for all embeddings except for Android, which creates a special JNI AssetResolver. Since the shell cannot recreate this resolver, update the logic to preserve existing resolvers instead.
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_ASSETS_ASSET_RESOLVER_H_
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#define FLUTTER_ASSETS_ASSET_RESOLVER_H_
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#include <string>
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#include <vector>
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#include "flutter/fml/macros.h"
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#include "flutter/fml/mapping.h"
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namespace flutter {
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class AssetResolver {
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public:
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AssetResolver() = default;
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virtual ~AssetResolver() = default;
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virtual bool IsValid() const = 0;
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//----------------------------------------------------------------------------
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/// @brief Certain asset resolvers are still valid after the asset
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/// manager is replaced before a hot reload, or after a new run
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/// configuration is created during a hot restart. By preserving
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/// these resolvers and re-inserting them into the new resolver or
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/// run configuration, the tooling can avoid needing to sync all
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/// application assets through the Dart devFS upon connecting to
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/// the VM Service. Besides improving the startup performance of
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/// running a Flutter application, it also reduces the occurance
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/// of tool failures due to repeated network flakes caused by
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/// damaged cables or hereto unknown bugs in the Dart HTTP server
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/// implementation.
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///
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/// @return Returns whether this resolver is valid after the asset manager
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/// or run configuration is updated.
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///
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virtual bool IsValidAfterAssetManagerChange() const = 0;
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[[nodiscard]] virtual std::unique_ptr<fml::Mapping> GetAsMapping(
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const std::string& asset_name) const = 0;
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private:
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FML_DISALLOW_COPY_AND_ASSIGN(AssetResolver);
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};
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} // namespace flutter
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#endif // FLUTTER_ASSETS_ASSET_RESOLVER_H_
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