зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
3.8 KiB
Plaintext
108 строки
3.8 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIURI;
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interface nsICacheEntryOpenCallback;
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interface nsICacheEntryDoomCallback;
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interface nsICacheStorageVisitor;
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/**
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* Representation of a cache storage. There can be just-in-mem,
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* in-mem+on-disk, in-mem+on-disk+app-cache or just a specific
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* app-cache storage.
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*/
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[scriptable, uuid(d9006881-a536-4ce3-bc48-e7f94b40a690)]
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interface nsICacheStorage : nsISupports
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{
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/**
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* Placeholder for specifying "no special flags" during open.
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*/
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const uint32_t OPEN_NORMALLY = 0;
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/**
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* Rewrite any existing data when opening a URL.
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*/
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const uint32_t OPEN_TRUNCATE = 1 << 0;
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/**
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* Only open an existing entry. Don't create a new one.
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*/
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const uint32_t OPEN_READONLY = 1 << 1;
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/**
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* Use for first-paint blocking loads.
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*/
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const uint32_t OPEN_PRIORITY = 1 << 2;
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/**
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* Bypass the cache load when write is still in progress.
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*/
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const uint32_t OPEN_BYPASS_IF_BUSY = 1 << 3;
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/**
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* Perform the cache entry check (onCacheEntryCheck invocation) on any thread
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* for optimal perfomance optimization. If this flag is not specified it is
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* ensured that onCacheEntryCheck is called on the same thread as respective
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* asyncOpen has been called.
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*/
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const uint32_t CHECK_MULTITHREADED = 1 << 4;
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/**
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* Asynchronously opens a cache entry for the specified URI.
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* Result is fetched asynchronously via the callback.
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*
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* @param aURI
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* The URI to search in cache or to open for writting.
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* @param aIdExtension
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* Any string that will extend (distinguish) the entry. Two entries
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* with the same aURI but different aIdExtension will be comletely
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* different entries. If you don't know what aIdExtension should be
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* leave it empty.
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* @param aFlags
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* OPEN_NORMALLY - open cache entry normally for read and write
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* OPEN_TRUNCATE - delete any existing entry before opening it
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* OPEN_READONLY - don't create an entry if there is none
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* OPEN_PRIORITY - give this request a priority over others
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* OPEN_BYPASS_IF_BUSY - backward compatibility only, LOAD_BYPASS_LOCAL_CACHE_IF_BUSY
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* CHECK_MULTITHREADED - onCacheEntryCheck may be called on any thread, consumer
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* implementation is thread-safe
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* @param aCallback
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* The consumer that receives the result.
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* IMPORTANT: The callback may be called sooner the method returns.
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*/
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void asyncOpenURI(in nsIURI aURI, in ACString aIdExtension,
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in uint32_t aFlags,
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in nsICacheEntryOpenCallback aCallback);
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/**
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* Synchronously check on existance of an entry. In case of disk entries
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* this uses information from the cache index. When the index data are not
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* up to date or index is still building, NS_ERROR_NOT_AVAILABLE is thrown.
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* The same error may throw any storage implementation that cannot determine
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* entry state without blocking the caller.
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*/
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boolean exists(in nsIURI aURI, in ACString aIdExtension);
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/**
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* Asynchronously removes an entry belonging to the URI from the cache.
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*/
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void asyncDoomURI(in nsIURI aURI, in ACString aIdExtension,
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in nsICacheEntryDoomCallback aCallback);
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/**
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* Asynchronously removes all cached entries under this storage.
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* NOTE: Disk storage also evicts memory storage.
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*/
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void asyncEvictStorage(in nsICacheEntryDoomCallback aCallback);
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/**
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* Visits the storage and its entries.
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* NOTE: Disk storage also visits memory storage.
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*/
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void asyncVisitStorage(in nsICacheStorageVisitor aVisitor,
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in boolean aVisitEntries);
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};
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