netwerk/streamconv/src/nsStreamConverterService.h

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  37
  38 #ifndef __nsstreamconverterservice__h___
  39 #define __nsstreamconverterservice__h___
  40
  41 #include "nsIStreamConverterService.h"
  42 #include "nsIStreamListener.h"
  43 #include "nsHashtable.h"
  44 #include "nsCOMArray.h"
  45 #include "nsIAtom.h"
  46
  47 class nsStreamConverterService : public nsIStreamConverterService {
  48 public:
  49     /////////////////////////////////////////////////////
  50     // nsISupports methods
  51     NS_DECL_ISUPPORTS
  52
  53
  54     /////////////////////////////////////////////////////
  55     // nsIStreamConverterService methods
  56     NS_DECL_NSISTREAMCONVERTERSERVICE
  57
  58     /////////////////////////////////////////////////////
  59     // nsStreamConverterService methods
  60     nsStreamConverterService();
  61     virtual ~nsStreamConverterService();
  62
  63     // Initialization routine. Must be called after this object is constructed.
  64     nsresult Init();
  65
  66 private:
  67     // Responsible for finding a converter for the given MIME-type.
  68     nsresult FindConverter(const char *aContractID, nsCStringArray **aEdgeList);
  69     nsresult BuildGraph(void);
  70     nsresult AddAdjacency(const char *aContractID);
  71     nsresult ParseFromTo(const char *aContractID, nsCString &aFromRes, nsCString &aToRes);
  72
  73     // member variables
  74     nsObjectHashtable              *mAdjacencyList;
  75 };
  76
  77 ///////////////////////////////////////////////////////////////////
  78 // Breadth-First-Search (BFS) algorithm state classes and types.
  79
  80 // used  to establish discovered vertecies.
  81 enum BFScolors {white, gray, black};
  82
  83 struct BFSState {
  84     BFScolors   color;
  85     PRInt32     distance;
  86     nsCStringKey  *predecessor;
  87     ~BFSState() {
  88         delete predecessor;
  89     }
  90 };
  91
  92 // adjacency list and BFS hashtable data class.
  93 struct SCTableData {
  94     nsCStringKey *key;
  95     union _data {
  96         BFSState *state;
  97         nsCOMArray<nsIAtom> *edges;
  98     } data;
  99
 100     SCTableData(nsCStringKey* aKey) : key(aKey) {
 101         data.state = nsnull;
 102     }
 103 };
 104 #endif // __nsstreamconverterservice__h___