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      1 /*
      2  * Copyright (C) 2011 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 ChromiumDataObjectItem_h
     32 #define ChromiumDataObjectItem_h
     33 
     34 #include "core/fileapi/File.h"
     35 #include "platform/SharedBuffer.h"
     36 #include "platform/weborigin/KURL.h"
     37 #include "wtf/RefCounted.h"
     38 #include "wtf/RefPtr.h"
     39 #include "wtf/text/WTFString.h"
     40 
     41 namespace WebCore {
     42 
     43 class Blob;
     44 class ExecutionContext;
     45 class StringCallback;
     46 
     47 class ChromiumDataObjectItem : public RefCounted<ChromiumDataObjectItem> {
     48 public:
     49     enum Kind {
     50         StringKind,
     51         FileKind
     52     };
     53 
     54     static PassRefPtr<ChromiumDataObjectItem> createFromString(const String& type, const String& data);
     55     static PassRefPtr<ChromiumDataObjectItem> createFromFile(PassRefPtr<File>);
     56     static PassRefPtr<ChromiumDataObjectItem> createFromURL(const String& url, const String& title);
     57     static PassRefPtr<ChromiumDataObjectItem> createFromHTML(const String& html, const KURL& baseURL);
     58     static PassRefPtr<ChromiumDataObjectItem> createFromSharedBuffer(const String& filename, PassRefPtr<SharedBuffer>);
     59     static PassRefPtr<ChromiumDataObjectItem> createFromPasteboard(const String& type, uint64_t sequenceNumber);
     60 
     61     Kind kind() const { return m_kind; }
     62     String type() const { return m_type; }
     63     void getAsString(PassOwnPtr<StringCallback>, ExecutionContext*) const;
     64     PassRefPtr<Blob> getAsFile() const;
     65 
     66     // Used to support legacy DataTransfer APIs and renderer->browser serialization.
     67     String internalGetAsString() const;
     68     PassRefPtr<SharedBuffer> sharedBuffer() const { return m_sharedBuffer; }
     69     String title() const { return m_title; }
     70     KURL baseURL() const { return m_baseURL; }
     71     bool isFilename() const;
     72 
     73 private:
     74     enum DataSource {
     75         PasteboardSource,
     76         InternalSource,
     77     };
     78 
     79     ChromiumDataObjectItem(Kind, const String& type);
     80     ChromiumDataObjectItem(Kind, const String& type, uint64_t sequenceNumber);
     81 
     82     DataSource m_source;
     83     Kind m_kind;
     84     String m_type;
     85 
     86     String m_data;
     87     RefPtr<File> m_file;
     88     RefPtr<SharedBuffer> m_sharedBuffer;
     89     // Optional metadata. Currently used for URL, HTML, and dragging files in.
     90     String m_title;
     91     KURL m_baseURL;
     92 
     93     uint64_t m_sequenceNumber; // Only valid when m_source == PasteboardSource
     94 };
     95 
     96 } // namespace WebCore
     97 
     98 #endif // ChromiumDataObjectItem_h
     99