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1
5 package org.exoplatform.services.grammar.wiki.impl;
6
7 import org.exoplatform.container.configuration.ServiceConfiguration;
8
9
14 public class ParsingContext {
15 char[] buf_ ;
16 int currentPosition_ ;
17 Token currentToken_ ;
18 private TokenHandlerManager tokenManager_ ;
19 private StringBuffer  out_ ;
20
21 public ParsingContext(ServiceConfiguration sconf) {
22 currentToken_ = new Token(0, 0);
23 tokenManager_ = new TokenHandlerManager(sconf) ;
24 }
25
26 public StringBuffer getOutputBuffer() { return out_ ; }
27 public void SetOutputBuffer(StringBuffer out) { out_ = out ; }
28
29 public TokenHandlerManager getTokenHandlerManager() { return tokenManager_; }
30
31 public void transform(String text) {
32 buf_ = text.toCharArray() ;
33 out_ = new StringBuffer () ;
34 currentToken_.end = -1 ;
35 Token token = nextToken(currentToken_) ;
36 while(token != null) {
37 token = tokenManager_.handleToken(null, token, this) ;
38 }
39 }
40
41 public Token nextToken(Token previous) {
42 currentPosition_ = previous.end + 1;
43 if(currentPosition_ >= buf_.length) return null ;
44 currentToken_.start = currentPosition_ ;
45 switch(buf_[currentPosition_]) {
46 case '{' : return readCurlyBracePrefixToken() ;
47 case '-' : return readDashPrefixToken() ;
48 case '_' : return readUnderscorePrefixToken() ;
49 case '*' : return readStarPrefixToken() ;
50 case '~' : return readTildePrefixToken() ;
51 case ':' : return readColonPrefixToken();
52 case '[' : return readSquareBracePrefixToken() ;
53 case '\n': case '\r': return readNewLinePrefixToken() ;
54 default : return readDefaultToken() ;
55 }
56 }
57
58 private Token readDefaultToken() {
59 for(; currentPosition_ < buf_.length; currentPosition_++) {
60 switch(buf_[currentPosition_]) {
61 case '{' : case '-' : case '_' : case '*' : case '~' :
62 case ':' : case '[' : case '\n' : case '\r' :{
63 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
64 }
65 default :
66 }
67 }
68 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
69 }
70
71 private Token readCurlyBracePrefixToken() {
72 for(; currentPosition_ < buf_.length; currentPosition_++) {
73 switch(buf_[currentPosition_]) {
74 case '}' : {
75 currentToken_ = createToken(currentPosition_, Token.CURLY_BRACES_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
76 currentToken_.type = getSubstring(currentToken_.start, currentToken_.end) ;
77 return currentToken_ ;
78 }
79 case '\n' : {
80 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
81 }
82 }
83 }
84 return createToken(currentPosition_--, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
85 }
86
87 private Token readSquareBracePrefixToken() {
88 for(; currentPosition_ < buf_.length; currentPosition_++) {
89 switch(buf_[currentPosition_]) {
90 case ']' : {
91 return createToken(currentPosition_, Token.LINK_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
92 }
93 case '\n' : case '\r' :{
94 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
95 }
96 }
97 }
98 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
99 }
100
101 private Token readColonPrefixToken() {
102 for(; currentPosition_ < buf_.length; currentPosition_++) {
103 switch(buf_[currentPosition_]) {
104 case '\n' : case '\r' : case ' ': case '\t': {
105 return createToken(--currentPosition_, Token.SMILEY_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
106 }
107 }
108 }
109 return createToken(--currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
110 }
111
112 private Token readDashPrefixToken() {
113 if(currentPosition_ + 1 >= buf_.length) {
114 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
115 }
116 if(buf_[currentPosition_] == '-' && buf_[currentPosition_ + 1] == '-') {
117 int i = currentPosition_ ;
118 while(i < buf_.length && buf_[i] == '-') i++;
119 i-- ;
120 if(i > currentPosition_ + 2) {
121 currentPosition_ = i ;
122 return createToken(currentPosition_, Token.HORIZONTAL_LINE_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
123 }
124 currentPosition_ = i ;
125 return createToken(currentPosition_ , Token.STRIKE_TOKEN, Token.INLINE_TOKEN_GROUP) ;
126 }
127 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
128 }
129
130 private Token readUnderscorePrefixToken() {
131 if(currentPosition_ + 1 >= buf_.length) {
132 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
133 }
134 if(buf_[currentPosition_] == '_' && buf_[currentPosition_ + 1] == '_') {
135 return createToken(++currentPosition_ , Token.UNDERLINE_TOKEN, Token.INLINE_TOKEN_GROUP) ;
136 }
137 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
138 }
139
140 private Token readStarPrefixToken() {
141 if(currentPosition_ + 1 >= buf_.length) {
142 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
143 }
144 if(buf_[currentPosition_] == '*' && buf_[currentPosition_ + 1] == '*') {
145 return createToken(++currentPosition_ , Token.BOLD_TOKEN, Token.INLINE_TOKEN_GROUP) ;
146 }
147
148 if(buf_[currentPosition_] == '*') {
149 return createToken(currentPosition_ , Token.BOLD_TOKEN, Token.INLINE_TOKEN_GROUP) ;
150 }
151 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
152 }
153
154 private Token readTildePrefixToken() {
155 if(currentPosition_ + 1 >= buf_.length) {
156 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
157 }
158 if(buf_[currentPosition_] == '~' && buf_[currentPosition_ + 1] == '~') {
159 return createToken(++currentPosition_ , Token.ITALIC_TOKEN, Token.INLINE_TOKEN_GROUP) ;
160 }
161 return createToken(currentPosition_, Token.DEFAULT_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
162 }
163
164 private Token readNewLinePrefixToken() {
165 int i = currentPosition_ ;
166 int newLineCounter = 0 ;
167 while(i < buf_.length && (buf_[i] == '\n' || buf_[i] == '\r')) {
168 if(buf_[i] == '\n') newLineCounter++ ;
169 i++ ;
170 }
171 if(newLineCounter > 1) {
172 if(i == buf_.length) i-- ;
173 if(buf_[i] != '\n' && buf_[i] != '\r') i-- ;
174 currentPosition_ = i - 1;
175 return createToken(currentPosition_, Token.MULTIPLE_NEW_LINE_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
176 }
177 while(i < buf_.length && (buf_[i] == ' ' || buf_[i] == '\t')) i++ ;
179 if(i + 2 < buf_.length) {
180 if(buf_[i] == '*') {
181 if(buf_[i] == '*' && buf_[i + 1] == '*' && buf_[i + 2] == '*') {
182 currentPosition_ = i + 2 ;
183 return createToken(currentPosition_, Token.LIST_LEVEL_3_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
184 }
185 if(buf_[i] == '*' && buf_[i + 1] == '*') {
186 currentPosition_ = i + 1 ;
187 return createToken(currentPosition_, Token.LIST_LEVEL_2_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
188 }
189 currentPosition_ = i ;
190 return createToken(currentPosition_, Token.LIST_LEVEL_1_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
191 }
192
193 if(buf_[i] == '1' ) {
194 if(buf_[i] == '1' && buf_[i + 1] == '.' && buf_[i + 2] == '1') {
195 currentPosition_ = i + 2 ;
196 return createToken(currentPosition_, Token.TITLE_1_1_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
197 } else if(buf_[i] == '1' && buf_[i + 1] == '.') {
198 currentPosition_ = i + 1 ;
199 return createToken(currentPosition_, Token.ENUMERATED_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
200 } else if(buf_[i] == '1' && buf_[i + 1] == ' ') {
201 currentPosition_ = i + 1 ;
202 return createToken(currentPosition_, Token.TITLE_1_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
203 }
204 }
205
206 if(buf_[i] == 'a' && buf_[i + 1] == '.') {
207 currentPosition_ = i + 1 ;
208 return createToken(currentPosition_, Token.ALPHABETICAL_ENUMERATED_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
209 }
210 if(buf_[i] == 'i' && buf_[i + 1] == '.') {
211 currentPosition_ = i + 1 ;
212 return createToken(currentPosition_, Token.ROMAN_ENUMERATED_TOKEN, Token.BLOCK_TOKEN_GROUP) ;
213 }
214 }
215 if(i == buf_.length) i-- ;
216 if(buf_[i] != '\n' && buf_[i] != '\r') i-- ;
217 currentPosition_ = i ;
218 return createToken(currentPosition_, Token.SINGLE_NEW_LINE_TOKEN, Token.SINGLE_TOKEN_GROUP) ;
219 }
220
221 final Token createToken(int nextEnd, String type, String group) {
222 currentToken_.end = nextEnd ;
223 currentToken_.type = type ;
224 currentToken_.group = group ;
225 return currentToken_ ;
226 }
227
228 final public String getSubstring(int offset , int end) {
229 return new String (buf_, offset, end - offset + 1) ;
230 }
231
232 final public char[] getSubBuffer(int offset , int end) {
233 char[] sub = new char[end - offset + 1] ;
234 System.arraycopy(buf_, offset, sub, 0, sub.length);
235 return sub;
236 }
237
238 final public void out(String s) {
239 out_.append(s) ;
240 }
241
242 final public void out(Token token) {
243 out_.append(buf_, token.start, token.end - token.start + 1) ;
244 }
245 } |
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