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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef WebApplicationCacheHost_h
     32 #define WebApplicationCacheHost_h
     33 
     34 #include "WebCommon.h"
     35 #include "WebURL.h"
     36 #include "WebVector.h"
     37 
     38 namespace blink {
     39 
     40 class WebApplicationCacheHostClient;
     41 class WebURL;
     42 class WebURLRequest;
     43 class WebURLResponse;
     44 struct WebURLError;
     45 
     46 // This interface is used by webkit to call out to the embedder. Webkit uses
     47 // the WebFrameClient::createApplicationCacheHost method to create instances,
     48 // and calls delete when the instance is no longer needed.
     49 class WebApplicationCacheHost {
     50 public:
     51     // These values must match WebCore::ApplicationCacheHost::Status values
     52     enum Status {
     53         Uncached,
     54         Idle,
     55         Checking,
     56         Downloading,
     57         UpdateReady,
     58         Obsolete
     59     };
     60 
     61     // These values must match WebCore::ApplicationCacheHost::EventID values
     62     enum EventID {
     63         CheckingEvent,
     64         ErrorEvent,
     65         NoUpdateEvent,
     66         DownloadingEvent,
     67         ProgressEvent,
     68         UpdateReadyEvent,
     69         CachedEvent,
     70         ObsoleteEvent
     71     };
     72 
     73     enum ErrorReason {
     74         ManifestError,
     75         SignatureError,
     76         ResourceError,
     77         ChangedError,
     78         AbortError,
     79         QuotaError,
     80         PolicyError,
     81         UnknownError
     82     };
     83 
     84     virtual ~WebApplicationCacheHost() { }
     85 
     86     // Called for every request made within the context.
     87     virtual void willStartMainResourceRequest(WebURLRequest& r, const WebApplicationCacheHost* spawningHost) { }
     88     virtual void willStartSubResourceRequest(WebURLRequest&) { }
     89 
     90     // One or the other selectCache methods is called after having parsed the <html> tag.
     91     // The latter returns false if the current document has been identified as a "foreign"
     92     // entry, in which case the frame navigation will be restarted by webkit.
     93     virtual void selectCacheWithoutManifest() { }
     94     virtual bool selectCacheWithManifest(const WebURL& manifestURL) { return true; }
     95 
     96     // Called as the main resource is retrieved.
     97     virtual void didReceiveResponseForMainResource(const WebURLResponse&) { }
     98     virtual void didReceiveDataForMainResource(const char* data, int len) { }
     99     virtual void didFinishLoadingMainResource(bool success) { }
    100 
    101     // Called on behalf of the scriptable interface.
    102     virtual Status status() { return Uncached; }
    103     virtual bool startUpdate() { return false; }
    104     virtual bool swapCache() { return false; }
    105     virtual void abort() { }
    106 
    107     // Structures and methods to support inspecting Application Caches.
    108     struct CacheInfo {
    109         WebURL manifestURL; // Empty if there is no associated cache.
    110         double creationTime;
    111         double updateTime;
    112         long long totalSize;
    113         CacheInfo() : creationTime(0), updateTime(0), totalSize(0) { }
    114     };
    115     struct ResourceInfo {
    116         WebURL url;
    117         long long size;
    118         bool isMaster;
    119         bool isManifest;
    120         bool isExplicit;
    121         bool isForeign;
    122         bool isFallback;
    123         ResourceInfo() : size(0), isMaster(false), isManifest(false), isExplicit(false), isForeign(false), isFallback(false) { }
    124     };
    125     virtual void getAssociatedCacheInfo(CacheInfo*) { }
    126     virtual void getResourceList(WebVector<ResourceInfo>*) { }
    127     virtual void deleteAssociatedCacheGroup() { }
    128 };
    129 
    130 } // namespace blink
    131 
    132 #endif // WebApplicationCacheHost_h
    133