|
1 /* |
|
2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the License "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Recognizer for the bowser supported MIME types. |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 #include "FeedsRec.h" |
|
20 |
|
21 #include <ImplementationProxy.h> |
|
22 |
|
23 |
|
24 // Constants |
|
25 _LIT8(KMimeTypeRss, "application/rss+xml"); |
|
26 //_LIT8(KMimeTypeAtom, "application/atom+xml"); |
|
27 _LIT8(KMimeTypeXml1, "application/xml"); |
|
28 _LIT8(KMimeTypeXml2, "text/xml"); |
|
29 |
|
30 |
|
31 // ----------------------------------------------------------------------------- |
|
32 // CFeedsRec::CFeedsRec |
|
33 // |
|
34 // Two-phased constructor. |
|
35 // ----------------------------------------------------------------------------- |
|
36 // |
|
37 CFeedsRec::CFeedsRec() |
|
38 :CApaDataRecognizerType(KUidMimeFeedsRec, CApaDataRecognizerType::EHigh) |
|
39 { |
|
40 iCountDataTypes = KSupportedMimetypes; |
|
41 } |
|
42 |
|
43 |
|
44 // ----------------------------------------------------------------------------- |
|
45 // CFeedsRec::PreferredBufSize |
|
46 // |
|
47 // Returns the preferred buffer size. |
|
48 // ----------------------------------------------------------------------------- |
|
49 // |
|
50 TUint CFeedsRec::PreferredBufSize() |
|
51 { |
|
52 return 0x100; |
|
53 } |
|
54 |
|
55 |
|
56 // ----------------------------------------------------------------------------- |
|
57 // CFeedsRec::SupportedDataTypeL |
|
58 // |
|
59 // Returns the index'ed supported mime-type. |
|
60 // ----------------------------------------------------------------------------- |
|
61 // |
|
62 TDataType CFeedsRec::SupportedDataTypeL(TInt aIndex) const |
|
63 { |
|
64 __ASSERT_DEBUG((aIndex >= 0) && (aIndex < KSupportedMimetypes), User::Invariant()); |
|
65 |
|
66 switch (aIndex) |
|
67 { |
|
68 case 0: |
|
69 return TDataType(KMimeTypeRss); |
|
70 |
|
71 default: |
|
72 return TDataType(); |
|
73 } |
|
74 } |
|
75 |
|
76 |
|
77 // ----------------------------------------------------------------------------- |
|
78 // CFeedsRec::DoRecognizeL |
|
79 // |
|
80 // Given the buffer it examines the buffer and sets the inherited |
|
81 // member variable, iConfidence. |
|
82 // ----------------------------------------------------------------------------- |
|
83 // |
|
84 void CFeedsRec::DoRecognizeL(const TDesC& aName, const TDesC8& aBuffer) |
|
85 { |
|
86 TInt confidence; |
|
87 |
|
88 iConfidence = ENotRecognized; |
|
89 |
|
90 // Examine the buffer for RSS. |
|
91 if ((confidence = RecognizeRss(aName, aBuffer)) != ENotRecognized) |
|
92 { |
|
93 iDataType = TDataType(KMimeTypeRss); |
|
94 iConfidence = confidence; |
|
95 } |
|
96 |
|
97 // Examine the buffer for Atom. |
|
98 // TODO: in 3.1 |
|
99 |
|
100 // Examine the buffer for Opml 1.0. |
|
101 // TODO: in 3.1 |
|
102 } |
|
103 |
|
104 |
|
105 // ----------------------------------------------------------------------------- |
|
106 // CFeedsRec::DoRecognizeRss |
|
107 // |
|
108 // Given the buffer it examines the buffer and returns the confidence level that |
|
109 // this document is rss. |
|
110 // ----------------------------------------------------------------------------- |
|
111 // |
|
112 TInt CFeedsRec::RecognizeRss(const TDesC& /*aName*/, const TDesC8& aBuffer) |
|
113 { |
|
114 _LIT8(KRss, "<rss"); |
|
115 _LIT8(KRdf, "<rdf:RDF"); |
|
116 _LIT8(KChannel, "<channel"); |
|
117 _LIT8(KRss1, "xmlns=\"http://purl.org/rss/1.0/\""); |
|
118 _LIT8(KXml, "<?xml"); |
|
119 _LIT8(KDtd, "//DTD RSS"); |
|
120 _LIT8(KOPML, "<opml"); |
|
121 |
|
122 TInt confidence = ENotRecognized; |
|
123 TInt count = 0; |
|
124 |
|
125 // TODO: Determine if there are common dot-extensions used for |
|
126 // this mime-type. If so, add code to check for them in aName. |
|
127 // If found set iConfidence to ECertain. |
|
128 |
|
129 if (aBuffer.FindF(KRss) != KErrNotFound) |
|
130 { |
|
131 count++; |
|
132 } |
|
133 if (aBuffer.FindF(KRdf) != KErrNotFound) |
|
134 { |
|
135 count++; |
|
136 } |
|
137 if (aBuffer.FindF(KChannel) != KErrNotFound) |
|
138 { |
|
139 count++; |
|
140 } |
|
141 if (aBuffer.FindF(KRss1) != KErrNotFound) |
|
142 { |
|
143 count++; |
|
144 } |
|
145 if (aBuffer.FindF(KXml) != KErrNotFound) |
|
146 { |
|
147 if (aBuffer.FindF(KOPML) == KErrNotFound) |
|
148 { |
|
149 count++; |
|
150 } |
|
151 } |
|
152 if (aBuffer.FindF(KDtd) != KErrNotFound) |
|
153 { |
|
154 count++; |
|
155 } |
|
156 |
|
157 if (count == 0) |
|
158 { |
|
159 confidence = ENotRecognized; |
|
160 } |
|
161 else if (count <= 2) |
|
162 { |
|
163 confidence = EProbable; |
|
164 } |
|
165 else |
|
166 { |
|
167 confidence = ECertain; |
|
168 } |
|
169 |
|
170 return confidence; |
|
171 } |
|
172 |
|
173 |
|
174 // Constants |
|
175 const TImplementationProxy ImplementationTable[] = |
|
176 { |
|
177 IMPLEMENTATION_PROXY_ENTRY(KFeedsRecImplUIDValue, CFeedsRec::CreateRecognizerL) |
|
178 }; |
|
179 |
|
180 |
|
181 // ----------------------------------------------------------------------------- |
|
182 // ImplementationGroupProxy |
|
183 // |
|
184 // Returns the proxy. |
|
185 // ----------------------------------------------------------------------------- |
|
186 // |
|
187 EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount) |
|
188 { |
|
189 aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy); |
|
190 |
|
191 return ImplementationTable; |
|
192 } |
|
193 |
|
194 |
|
195 // ----------------------------------------------------------------------------- |
|
196 // CFeedsRec::CreateRecognizerL |
|
197 // |
|
198 // Creates an recognizer instance. |
|
199 // ----------------------------------------------------------------------------- |
|
200 // |
|
201 CApaDataRecognizerType* CFeedsRec::CreateRecognizerL() |
|
202 { |
|
203 return new (ELeave) CFeedsRec(); |
|
204 } |
|
205 |