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23 : *
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26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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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 "nsTArray.h"
46 : #include "nsIAtom.h"
47 :
48 : class nsStreamConverterService : public nsIStreamConverterService {
49 : public:
50 : /////////////////////////////////////////////////////
51 : // nsISupports methods
52 : NS_DECL_ISUPPORTS
53 :
54 :
55 : /////////////////////////////////////////////////////
56 : // nsIStreamConverterService methods
57 : NS_DECL_NSISTREAMCONVERTERSERVICE
58 :
59 : /////////////////////////////////////////////////////
60 : // nsStreamConverterService methods
61 : nsStreamConverterService();
62 : virtual ~nsStreamConverterService();
63 :
64 : // Initialization routine. Must be called after this object is constructed.
65 : nsresult Init();
66 :
67 : private:
68 : // Responsible for finding a converter for the given MIME-type.
69 : nsresult FindConverter(const char *aContractID, nsTArray<nsCString> **aEdgeList);
70 : nsresult BuildGraph(void);
71 : nsresult AddAdjacency(const char *aContractID);
72 : nsresult ParseFromTo(const char *aContractID, nsCString &aFromRes, nsCString &aToRes);
73 :
74 : // member variables
75 : nsObjectHashtable *mAdjacencyList;
76 : };
77 :
78 : ///////////////////////////////////////////////////////////////////
79 : // Breadth-First-Search (BFS) algorithm state classes and types.
80 :
81 : // used to establish discovered vertecies.
82 : enum BFScolors {white, gray, black};
83 :
84 : struct BFSState {
85 : BFScolors color;
86 : PRInt32 distance;
87 : nsCStringKey *predecessor;
88 0 : ~BFSState() {
89 0 : delete predecessor;
90 0 : }
91 : };
92 :
93 : // adjacency list and BFS hashtable data class.
94 : struct SCTableData {
95 : nsCStringKey *key;
96 : union _data {
97 : BFSState *state;
98 : nsCOMArray<nsIAtom> *edges;
99 : } data;
100 :
101 0 : SCTableData(nsCStringKey* aKey) : key(aKey) {
102 0 : data.state = nsnull;
103 0 : }
104 : };
105 : #endif // __nsstreamconverterservice__h___
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