Source Code Cross Referenced for CSSFormatter.java in  » IDE » J » org » armedbear » j » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE » J » org.armedbear.j 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * CSSFormatter.java
003:         *
004:         * Copyright (C) 2002 Peter Graves
005:         * $Id: CSSFormatter.java,v 1.1.1.1 2002/09/24 16:08:12 piso Exp $
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License
009:         * as published by the Free Software Foundation; either version 2
010:         * of the License, or (at your option) any later version.
011:         *
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015:         * GNU General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU General Public License
018:         * along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020:         */
021:
022:        package org.armedbear.j;
023:
024:        public final class CSSFormatter extends Formatter implements  Constants {
025:            // States (used in line flags).
026:            private static final int CSS_STATE_QUOTE = 0x0001;
027:            private static final int CSS_STATE_SINGLEQUOTE = 0x0002;
028:            private static final int CSS_STATE_COMMENT = 0x0004;
029:            private static final int CSS_STATE_BRACE = 0x0008;
030:            private static final int CSS_STATE_IN_BLOCK = 0x0010;
031:            private static final int CSS_STATE_NUMBER = 0x0020;
032:            private static final int CSS_STATE_PROPERTY = 0x0040;
033:            private static final int CSS_STATE_VALUE = 0x0080;
034:            private static final int CSS_STATE_SELECTOR = 0x0100;
035:
036:            // Formats.
037:            private static final int CSS_FORMAT_TEXT = 0;
038:            private static final int CSS_FORMAT_COMMENT = 1;
039:            private static final int CSS_FORMAT_STRING = 2;
040:            private static final int CSS_FORMAT_PROPERTY = 3;
041:            private static final int CSS_FORMAT_BRACE = 4;
042:            private static final int CSS_FORMAT_NUMBER = 5;
043:            private static final int CSS_FORMAT_SELECTOR = 6;
044:
045:            private static final CSSMode mode = CSSMode.getMode();
046:
047:            public CSSFormatter(Buffer buffer) {
048:                this .buffer = buffer;
049:            }
050:
051:            private int tokenBegin = 0;
052:
053:            private void endToken(String text, int tokenEnd, int state) {
054:                if (tokenEnd - tokenBegin > 0) {
055:                    int format = CSS_FORMAT_TEXT;
056:                    if ((state & (CSS_STATE_QUOTE | CSS_STATE_SINGLEQUOTE)) != 0)
057:                        format = CSS_FORMAT_STRING;
058:                    else if ((state & CSS_STATE_COMMENT) != 0)
059:                        format = CSS_FORMAT_COMMENT;
060:                    else if ((state & CSS_STATE_BRACE) != 0)
061:                        format = CSS_FORMAT_BRACE;
062:                    else if ((state & CSS_STATE_NUMBER) != 0)
063:                        format = CSS_FORMAT_NUMBER;
064:                    else if ((state & CSS_STATE_PROPERTY) != 0)
065:                        format = CSS_FORMAT_PROPERTY;
066:                    else if ((state & CSS_STATE_VALUE) != 0)
067:                        format = CSS_FORMAT_TEXT;
068:                    else if ((state & CSS_STATE_SELECTOR) != 0)
069:                        format = CSS_FORMAT_SELECTOR;
070:                    addSegment(text, tokenBegin, tokenEnd, format);
071:                    tokenBegin = tokenEnd;
072:                }
073:            }
074:
075:            private void parseLine(Line line) {
076:                final String text;
077:                if (Editor.tabsAreVisible())
078:                    text = Utilities.makeTabsVisible(line.getText(), buffer
079:                            .getTabWidth());
080:                else
081:                    text = Utilities
082:                            .detab(line.getText(), buffer.getTabWidth());
083:                tokenBegin = 0;
084:                int state = line.flags();
085:                int i = 0;
086:                final int limit = text.length();
087:                // Skip whitespace at start of line.
088:                while (i < limit) {
089:                    if (Character.isWhitespace(text.charAt(i)))
090:                        ++i;
091:                    else {
092:                        endToken(text, i, state);
093:                        break;
094:                    }
095:                }
096:                while (i < limit) {
097:                    final char c = text.charAt(i);
098:                    if (c == '\\' && i < limit - 1) {
099:                        // Escape character.
100:                        i += 2;
101:                        continue;
102:                    }
103:                    if ((state & CSS_STATE_COMMENT) != 0) {
104:                        if (i < limit - 1 && c == '*'
105:                                && text.charAt(i + 1) == '/') {
106:                            endToken(text, i + 2, state);
107:                            state &= ~CSS_STATE_COMMENT;
108:                            i += 2;
109:                        } else
110:                            ++i;
111:                        continue;
112:                    }
113:                    if ((state & CSS_STATE_QUOTE) != 0) {
114:                        if (c == '"') {
115:                            endToken(text, i + 1, state);
116:                            state &= ~CSS_STATE_QUOTE;
117:                        }
118:                        ++i;
119:                        continue;
120:                    }
121:                    if ((state & CSS_STATE_SINGLEQUOTE) != 0) {
122:                        if (c == '"') {
123:                            endToken(text, i + 1, state);
124:                            state &= ~CSS_STATE_SINGLEQUOTE;
125:                        }
126:                        ++i;
127:                        continue;
128:                    }
129:                    // Reaching here, we're not in a comment or a quoted string.
130:                    if (c == '"') {
131:                        endToken(text, i, state);
132:                        state |= CSS_STATE_QUOTE;
133:                        ++i;
134:                        continue;
135:                    }
136:                    if (c == '\'') {
137:                        endToken(text, i, state);
138:                        state |= CSS_STATE_SINGLEQUOTE;
139:                        ++i;
140:                        continue;
141:                    }
142:                    if (c == '/') {
143:                        if (i < limit - 1) {
144:                            if (text.charAt(i + 1) == '*') {
145:                                endToken(text, i, state);
146:                                state |= CSS_STATE_COMMENT;
147:                                i += 2;
148:                            } else
149:                                ++i;
150:                        } else
151:                            ++i;
152:                        continue;
153:                    }
154:                    if (c == '{') {
155:                        endToken(text, i, state);
156:                        endToken(text, ++i, CSS_STATE_BRACE);
157:                        state |= CSS_STATE_IN_BLOCK;
158:                        continue;
159:                    }
160:                    if (c == '}') {
161:                        endToken(text, i, state);
162:                        endToken(text, ++i, CSS_STATE_BRACE);
163:                        state &= ~CSS_STATE_IN_BLOCK;
164:                        continue;
165:                    }
166:                    if ((state & CSS_STATE_IN_BLOCK) != 0) {
167:                        if ((state & CSS_STATE_NUMBER) != 0) {
168:                            boolean isNumeric;
169:                            if ("0123456789".indexOf(c) >= 0) {
170:                                // Definitely a number.
171:                                isNumeric = true;
172:                            } else if ("abcdefABCDEF".indexOf(c) >= 0) {
173:                                if (c == 'e' && i < limit - 1
174:                                        && text.charAt(i + 1) == 'm') {
175:                                    // Not a number ("em").
176:                                    isNumeric = false;
177:                                } else {
178:                                    // Hex digit.
179:                                    isNumeric = true;
180:                                }
181:                            } else
182:                                isNumeric = false;
183:                            if (!isNumeric) {
184:                                // Not a number.
185:                                endToken(text, i, state);
186:                                state &= ~CSS_STATE_NUMBER;
187:                            }
188:                            ++i;
189:                            continue;
190:                        }
191:                        if ((state & CSS_STATE_VALUE) != 0) {
192:                            if (c == '#' || Character.isDigit(c)) {
193:                                endToken(text, i, state);
194:                                state |= CSS_STATE_NUMBER;
195:                                ++i;
196:                                continue;
197:                            }
198:                            if (c == '-' && i < limit - 1
199:                                    && Character.isDigit(text.charAt(i + 1))) {
200:                                endToken(text, i, state);
201:                                state |= CSS_STATE_NUMBER;
202:                                i += 2;
203:                                continue;
204:                            }
205:                            if (c == ';') {
206:                                // End of value.
207:                                endToken(text, i, state);
208:                                state &= ~CSS_STATE_VALUE;
209:                                ++i;
210:                                continue;
211:                            }
212:                            ++i;
213:                            continue;
214:                        }
215:                        if (c == ':') {
216:                            endToken(text, i, CSS_STATE_PROPERTY);
217:                            state |= CSS_STATE_VALUE;
218:                            ++i;
219:                            continue;
220:                        }
221:                    }
222:                    if ((state & CSS_STATE_SELECTOR) != 0) {
223:                        if (!mode.isIdentifierPart(c)) {
224:                            endToken(text, i, state);
225:                            state &= ~CSS_STATE_SELECTOR;
226:                        }
227:                        ++i;
228:                        continue;
229:                    }
230:                    if (state == 0) {
231:                        if (mode.isIdentifierStart(c)) {
232:                            endToken(text, i, state);
233:                            state |= CSS_STATE_SELECTOR;
234:                        }
235:                    }
236:                    ++i;
237:                }
238:                // Reached end of line.
239:                endToken(text, i, state);
240:            }
241:
242:            public LineSegmentList formatLine(Line line) {
243:                clearSegmentList();
244:                if (line == null) {
245:                    addSegment("", CSS_FORMAT_TEXT);
246:                    return segmentList;
247:                }
248:                parseLine(line);
249:                return segmentList;
250:            }
251:
252:            public boolean parseBuffer() {
253:                int state = 0;
254:                Line line = buffer.getFirstLine();
255:                boolean changed = false;
256:                while (line != null) {
257:                    int oldflags = line.flags();
258:                    // Quoted strings can't span lines. (Can they?)
259:                    state &= ~(CSS_STATE_QUOTE | CSS_STATE_SINGLEQUOTE);
260:                    if (state != oldflags) {
261:                        line.setFlags(state);
262:                        changed = true;
263:                    }
264:                    final int limit = line.length();
265:                    for (int i = 0; i < limit; i++) {
266:                        char c = line.charAt(i);
267:                        if (c == '\\' && i < limit - 1) {
268:                            // Escape.
269:                            ++i;
270:                            continue;
271:                        }
272:                        if ((state & CSS_STATE_COMMENT) != 0) {
273:                            if (c == '*' && i < limit - 1) {
274:                                c = line.charAt(i + 1);
275:                                if (c == '/') {
276:                                    ++i;
277:                                    state &= ~CSS_STATE_COMMENT;
278:                                }
279:                            }
280:                            continue;
281:                        }
282:                        if ((state & CSS_STATE_QUOTE) != 0) {
283:                            if (c == '"')
284:                                state &= ~CSS_STATE_QUOTE;
285:                            continue;
286:                        }
287:                        if ((state & CSS_STATE_SINGLEQUOTE) != 0) {
288:                            if (c == '"')
289:                                state &= ~CSS_STATE_SINGLEQUOTE;
290:                            continue;
291:                        }
292:                        // Not in comment or quoted string.
293:                        if (c == '{') {
294:                            state |= CSS_STATE_IN_BLOCK;
295:                            continue;
296:                        }
297:                        if (c == '}') {
298:                            state &= ~CSS_STATE_IN_BLOCK;
299:                            continue;
300:                        }
301:                        if (c == '/' && i < limit - 1) {
302:                            c = line.charAt(++i);
303:                            if (c == '*')
304:                                state |= CSS_STATE_COMMENT;
305:                        } else if (c == '"') {
306:                            state |= CSS_STATE_QUOTE;
307:                        } else if (c == '\'') {
308:                            state |= CSS_STATE_SINGLEQUOTE;
309:                        }
310:                    }
311:                    line = line.next();
312:                }
313:                buffer.setNeedsParsing(false);
314:                return changed;
315:            }
316:
317:            public FormatTable getFormatTable() {
318:                if (formatTable == null) {
319:                    formatTable = new FormatTable("CSSMode");
320:                    formatTable.addEntryFromPrefs(CSS_FORMAT_TEXT, "text");
321:                    formatTable
322:                            .addEntryFromPrefs(CSS_FORMAT_COMMENT, "comment");
323:                    formatTable.addEntryFromPrefs(CSS_FORMAT_STRING, "string");
324:                    formatTable.addEntryFromPrefs(CSS_FORMAT_PROPERTY,
325:                            "property", "keyword");
326:                    formatTable.addEntryFromPrefs(CSS_FORMAT_BRACE, "brace");
327:                    formatTable.addEntryFromPrefs(CSS_FORMAT_NUMBER, "number");
328:                    formatTable.addEntryFromPrefs(CSS_FORMAT_SELECTOR,
329:                            "selector", "function");
330:                }
331:                return formatTable;
332:            }
333:        }
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