content/base/public/nsDOMFile.h

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  15  * The Original Code is mozila.org code.
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  19  * Portions created by the Initial Developer are Copyright (C) 2007
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  22  * Contributor(s):
  23  *   Dave Camp <dcamp@mozilla.com>
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  38
  39 #ifndef nsDOMFile_h__
  40 #define nsDOMFile_h__
  41
  42 #include "nsICharsetDetectionObserver.h"
  43 #include "nsIDOMFile.h"
  44 #include "nsIDOMFileList.h"
  45 #include "nsIInputStream.h"
  46 #include "nsCOMArray.h"
  47 #include "nsCOMPtr.h"
  48 #include "nsString.h"
  49
  50 class nsIDOMDocument;
  51 class nsIFile;
  52 class nsIInputStream;
  53
  54 class nsDOMFile : public nsIDOMFile,
  55                   public nsICharsetDetectionObserver
  56 {
  57 public:
  58   NS_DECL_ISUPPORTS
  59   NS_DECL_NSIDOMFILE
  60
  61   nsDOMFile(nsIFile *aFile)
  62     : mFile(aFile)
  63   {}
  64   ~nsDOMFile() {}
  65
  66   // from nsICharsetDetectionObserver
  67   NS_IMETHOD Notify(const char *aCharset, nsDetectionConfident aConf);
  68
  69 private:
  70   nsCOMPtr<nsIFile> mFile;
  71   nsString mContentType;
  72   nsCString mCharset;
  73
  74   nsresult GuessCharset(nsIInputStream *aStream,
  75                         nsACString &aCharset);
  76   nsresult ConvertStream(nsIInputStream *aStream, const char *aCharset,
  77                          nsAString &aResult);
  78 };
  79
  80 class nsDOMFileList : public nsIDOMFileList
  81 {
  82 public:
  83   NS_DECL_ISUPPORTS
  84   NS_DECL_NSIDOMFILELIST
  85
  86   PRBool Append(nsIDOMFile *aFile) { return mFiles.AppendObject(aFile); }
  87
  88   PRBool Remove(PRUint32 aIndex) { return mFiles.RemoveObjectAt(aIndex); }
  89   void Clear() { return mFiles.Clear(); }
  90
  91   nsIDOMFile* GetItemAt(PRUint32 aIndex)
  92   {
  93     return mFiles.SafeObjectAt(aIndex);
  94   }
  95
  96   static nsDOMFileList* FromSupports(nsISupports* aSupports)
  97   {
  98 #ifdef DEBUG
  99     {
 100       nsCOMPtr<nsIDOMFileList> list_qi = do_QueryInterface(aSupports);
 101
 102       // If this assertion fires the QI implementation for the object in
 103       // question doesn't use the nsIDOMFileList pointer as the nsISupports
 104       // pointer. That must be fixed, or we'll crash...
 105       NS_ASSERTION(list_qi == static_cast<nsIDOMFileList*>(aSupports),
 106                    "Uh, fix QI!");
 107     }
 108 #endif
 109
 110     return static_cast<nsDOMFileList*>(aSupports);
 111   }
 112
 113 private:
 114   nsCOMArray<nsIDOMFile> mFiles;
 115 };
 116
 117 #endif