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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 FileSystemCallbacks_h
     32 #define FileSystemCallbacks_h
     33 
     34 #include "modules/filesystem/EntriesCallback.h"
     35 #include "platform/AsyncFileSystemCallbacks.h"
     36 #include "platform/FileSystemType.h"
     37 #include "wtf/Vector.h"
     38 #include "wtf/text/WTFString.h"
     39 
     40 namespace blink {
     41 
     42 class DOMFileSystemBase;
     43 class DirectoryReaderBase;
     44 class EntriesCallback;
     45 class EntryCallback;
     46 class ErrorCallback;
     47 class FileCallback;
     48 struct FileMetadata;
     49 class FileSystemCallback;
     50 class FileWriterBase;
     51 class FileWriterBaseCallback;
     52 class MetadataCallback;
     53 class ExecutionContext;
     54 class VoidCallback;
     55 
     56 class FileSystemCallbacksBase : public AsyncFileSystemCallbacks {
     57 public:
     58     virtual ~FileSystemCallbacksBase();
     59 
     60     // For ErrorCallback.
     61     virtual void didFail(int code) OVERRIDE FINAL;
     62 
     63     // Other callback methods are implemented by each subclass.
     64 
     65 protected:
     66     FileSystemCallbacksBase(ErrorCallback*, DOMFileSystemBase*, ExecutionContext*);
     67 
     68     bool shouldScheduleCallback() const;
     69 
     70 #if !ENABLE(OILPAN)
     71     template <typename CB, typename CBArg>
     72     void handleEventOrScheduleCallback(RawPtr<CB>, RawPtr<CBArg>);
     73 #endif
     74 
     75     template <typename CB, typename CBArg>
     76     void handleEventOrScheduleCallback(RawPtr<CB>, CBArg*);
     77 
     78     template <typename CB, typename CBArg>
     79     void handleEventOrScheduleCallback(RawPtr<CB>, PassRefPtrWillBeRawPtr<CBArg>);
     80 
     81     template <typename CB>
     82     void handleEventOrScheduleCallback(RawPtr<CB>);
     83 
     84     Persistent<ErrorCallback> m_errorCallback;
     85     Persistent<DOMFileSystemBase> m_fileSystem;
     86     RefPtrWillBePersistent<ExecutionContext> m_executionContext;
     87     int m_asyncOperationId;
     88 };
     89 
     90 // Subclasses ----------------------------------------------------------------
     91 
     92 class EntryCallbacks FINAL : public FileSystemCallbacksBase {
     93 public:
     94     static PassOwnPtr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*, const String& expectedPath, bool isDirectory);
     95     virtual void didSucceed() OVERRIDE;
     96 
     97 private:
     98     EntryCallbacks(EntryCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*, const String& expectedPath, bool isDirectory);
     99     Persistent<EntryCallback> m_successCallback;
    100     String m_expectedPath;
    101     bool m_isDirectory;
    102 };
    103 
    104 class EntriesCallbacks FINAL : public FileSystemCallbacksBase {
    105 public:
    106     static PassOwnPtr<AsyncFileSystemCallbacks> create(EntriesCallback*, ErrorCallback*, ExecutionContext*, DirectoryReaderBase*, const String& basePath);
    107     virtual void didReadDirectoryEntry(const String& name, bool isDirectory) OVERRIDE;
    108     virtual void didReadDirectoryEntries(bool hasMore) OVERRIDE;
    109 
    110 private:
    111     EntriesCallbacks(EntriesCallback*, ErrorCallback*, ExecutionContext*, DirectoryReaderBase*, const String& basePath);
    112     Persistent<EntriesCallback> m_successCallback;
    113     Persistent<DirectoryReaderBase> m_directoryReader;
    114     String m_basePath;
    115     PersistentHeapVector<Member<Entry> > m_entries;
    116 };
    117 
    118 class FileSystemCallbacks FINAL : public FileSystemCallbacksBase {
    119 public:
    120     static PassOwnPtr<AsyncFileSystemCallbacks> create(FileSystemCallback*, ErrorCallback*, ExecutionContext*, FileSystemType);
    121     virtual void didOpenFileSystem(const String& name, const KURL& rootURL) OVERRIDE;
    122 
    123 private:
    124     FileSystemCallbacks(FileSystemCallback*, ErrorCallback*, ExecutionContext*, FileSystemType);
    125     Persistent<FileSystemCallback> m_successCallback;
    126     FileSystemType m_type;
    127 };
    128 
    129 class ResolveURICallbacks FINAL : public FileSystemCallbacksBase {
    130 public:
    131     static PassOwnPtr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*);
    132     virtual void didResolveURL(const String& name, const KURL& rootURL, FileSystemType, const String& filePath, bool isDirectry) OVERRIDE;
    133 
    134 private:
    135     ResolveURICallbacks(EntryCallback*, ErrorCallback*, ExecutionContext*);
    136     Persistent<EntryCallback> m_successCallback;
    137 };
    138 
    139 class MetadataCallbacks FINAL : public FileSystemCallbacksBase {
    140 public:
    141     static PassOwnPtr<AsyncFileSystemCallbacks> create(MetadataCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
    142     virtual void didReadMetadata(const FileMetadata&) OVERRIDE;
    143 
    144 private:
    145     MetadataCallbacks(MetadataCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
    146     Persistent<MetadataCallback> m_successCallback;
    147 };
    148 
    149 class FileWriterBaseCallbacks FINAL : public FileSystemCallbacksBase {
    150 public:
    151     static PassOwnPtr<AsyncFileSystemCallbacks> create(PassRefPtrWillBeRawPtr<FileWriterBase>, FileWriterBaseCallback*, ErrorCallback*, ExecutionContext*);
    152     virtual void didCreateFileWriter(PassOwnPtr<WebFileWriter>, long long length) OVERRIDE;
    153 
    154 private:
    155     FileWriterBaseCallbacks(PassRefPtrWillBeRawPtr<FileWriterBase>, FileWriterBaseCallback*, ErrorCallback*, ExecutionContext*);
    156     Persistent<FileWriterBase> m_fileWriter;
    157     Persistent<FileWriterBaseCallback> m_successCallback;
    158 };
    159 
    160 class SnapshotFileCallback FINAL : public FileSystemCallbacksBase {
    161 public:
    162     static PassOwnPtr<AsyncFileSystemCallbacks> create(DOMFileSystemBase*, const String& name, const KURL&, FileCallback*, ErrorCallback*, ExecutionContext*);
    163     virtual void didCreateSnapshotFile(const FileMetadata&, PassRefPtr<BlobDataHandle> snapshot);
    164 
    165 private:
    166     SnapshotFileCallback(DOMFileSystemBase*, const String& name, const KURL&, FileCallback*, ErrorCallback*, ExecutionContext*);
    167     String m_name;
    168     KURL m_url;
    169     Persistent<FileCallback> m_successCallback;
    170 };
    171 
    172 class VoidCallbacks FINAL : public FileSystemCallbacksBase {
    173 public:
    174     static PassOwnPtr<AsyncFileSystemCallbacks> create(VoidCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
    175     virtual void didSucceed() OVERRIDE;
    176 
    177 private:
    178     VoidCallbacks(VoidCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
    179     Persistent<VoidCallback> m_successCallback;
    180 };
    181 
    182 } // namespace blink
    183 
    184 #endif // FileSystemCallbacks_h
    185