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37 :
38 : #ifndef NS_EXPAT_DRIVER__
39 : #define NS_EXPAT_DRIVER__
40 :
41 : #include "expat_config.h"
42 : #include "expat.h"
43 : #include "nsCOMPtr.h"
44 : #include "nsString.h"
45 : #include "nsIDTD.h"
46 : #include "nsITokenizer.h"
47 : #include "nsIInputStream.h"
48 : #include "nsIParser.h"
49 : #include "nsCycleCollectionParticipant.h"
50 :
51 : class nsIExpatSink;
52 : class nsIExtendedExpatSink;
53 : struct nsCatalogData;
54 :
55 : class nsExpatDriver : public nsIDTD,
56 : public nsITokenizer
57 : {
58 : public:
59 0 : NS_DECL_CYCLE_COLLECTING_ISUPPORTS
60 : NS_DECL_NSIDTD
61 : NS_DECL_NSITOKENIZER
62 21700 : NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsExpatDriver, nsIDTD)
63 :
64 : nsExpatDriver();
65 : virtual ~nsExpatDriver();
66 :
67 : int HandleExternalEntityRef(const PRUnichar *aOpenEntityNames,
68 : const PRUnichar *aBase,
69 : const PRUnichar *aSystemId,
70 : const PRUnichar *aPublicId);
71 : nsresult HandleStartElement(const PRUnichar *aName, const PRUnichar **aAtts);
72 : nsresult HandleEndElement(const PRUnichar *aName);
73 : nsresult HandleCharacterData(const PRUnichar *aCData, const PRUint32 aLength);
74 : nsresult HandleComment(const PRUnichar *aName);
75 : nsresult HandleProcessingInstruction(const PRUnichar *aTarget,
76 : const PRUnichar *aData);
77 : nsresult HandleXMLDeclaration(const PRUnichar *aVersion,
78 : const PRUnichar *aEncoding,
79 : PRInt32 aStandalone);
80 : nsresult HandleDefault(const PRUnichar *aData, const PRUint32 aLength);
81 : nsresult HandleStartCdataSection();
82 : nsresult HandleEndCdataSection();
83 : nsresult HandleStartDoctypeDecl(const PRUnichar* aDoctypeName,
84 : const PRUnichar* aSysid,
85 : const PRUnichar* aPubid,
86 : bool aHasInternalSubset);
87 : nsresult HandleEndDoctypeDecl();
88 : nsresult HandleStartNamespaceDecl(const PRUnichar* aPrefix,
89 : const PRUnichar* aUri);
90 : nsresult HandleEndNamespaceDecl(const PRUnichar* aPrefix);
91 : nsresult HandleNotationDecl(const PRUnichar* aNotationName,
92 : const PRUnichar* aBase,
93 : const PRUnichar* aSysid,
94 : const PRUnichar* aPubid);
95 : nsresult HandleUnparsedEntityDecl(const PRUnichar* aEntityName,
96 : const PRUnichar* aBase,
97 : const PRUnichar* aSysid,
98 : const PRUnichar* aPubid,
99 : const PRUnichar* aNotationName);
100 :
101 : private:
102 : nsresult HandleToken(CToken* aToken);
103 :
104 : // Load up an external stream to get external entity information
105 : nsresult OpenInputStreamFromExternalDTD(const PRUnichar* aFPIStr,
106 : const PRUnichar* aURLStr,
107 : const PRUnichar* aBaseURL,
108 : nsIInputStream** aStream,
109 : nsAString& aAbsURL);
110 :
111 : /**
112 : * Pass a buffer to Expat. If Expat is blocked aBuffer should be null and
113 : * aLength should be 0. The result of the call will be stored in
114 : * mInternalState. Expat will parse as much of the buffer as it can and store
115 : * the rest in its internal buffer.
116 : *
117 : * @param aBuffer the buffer to pass to Expat. May be null.
118 : * @param aLength the length of the buffer to pass to Expat (in number of
119 : * PRUnichar's). Must be 0 if aBuffer is null and > 0 if
120 : * aBuffer is not null.
121 : * @param aIsFinal whether there will definitely not be any more new buffers
122 : * passed in to ParseBuffer
123 : * @param aConsumed [out] the number of PRUnichars that Expat consumed. This
124 : * doesn't include the PRUnichars that Expat stored in
125 : * its buffer but didn't parse yet.
126 : */
127 : void ParseBuffer(const PRUnichar *aBuffer, PRUint32 aLength, bool aIsFinal,
128 : PRUint32 *aConsumed);
129 : nsresult HandleError();
130 :
131 : void MaybeStopParser(nsresult aState);
132 :
133 33655 : bool BlockedOrInterrupted()
134 : {
135 : return mInternalState == NS_ERROR_HTMLPARSER_BLOCK ||
136 33655 : mInternalState == NS_ERROR_HTMLPARSER_INTERRUPTED;
137 : }
138 :
139 : XML_Parser mExpatParser;
140 : nsString mLastLine;
141 : nsString mCDataText;
142 : // Various parts of a doctype
143 : nsString mDoctypeName;
144 : nsString mSystemID;
145 : nsString mPublicID;
146 : nsString mInternalSubset;
147 : bool mInCData;
148 : bool mInInternalSubset;
149 : bool mInExternalDTD;
150 : bool mMadeFinalCallToExpat;
151 :
152 : // Whether we're sure that we won't be getting more buffers to parse from
153 : // Necko
154 : bool mIsFinalChunk;
155 :
156 : nsresult mInternalState;
157 :
158 : // The length of the data in Expat's buffer (in number of PRUnichars).
159 : PRUint32 mExpatBuffered;
160 :
161 : // These sinks all refer the same conceptual object. mOriginalSink is
162 : // identical with the nsIContentSink* passed to WillBuildModel, and exists
163 : // only to avoid QI-ing back to nsIContentSink*.
164 : nsCOMPtr<nsIContentSink> mOriginalSink;
165 : nsCOMPtr<nsIExpatSink> mSink;
166 : nsCOMPtr<nsIExtendedExpatSink> mExtendedSink;
167 :
168 : const nsCatalogData* mCatalogData; // weak
169 : nsString mURISpec;
170 :
171 : // Used for error reporting.
172 : PRUint64 mInnerWindowID;
173 : };
174 :
175 : #endif
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