Source Code Cross Referenced for RichTextParser.java in  » Web-Framework » ThinWire » thinwire » render » web » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » ThinWire » thinwire.render.web 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:        #IFNDEF ALT_LICENSE
003:                                   ThinWire(R) RIA Ajax Framework
004:                         Copyright (C) 2003-2007 Custom Credit Systems
005:
006:          This library is free software; you can redistribute it and/or modify it under
007:          the terms of the GNU Lesser General Public License as published by the Free
008:          Software Foundation; either version 2.1 of the License, or (at your option) any
009:          later version.
010:
011:          This library is distributed in the hope that it will be useful, but WITHOUT ANY
012:          WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
013:          PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
014:
015:          You should have received a copy of the GNU Lesser General Public License along
016:          with this library; if not, write to the Free Software Foundation, Inc., 59
017:          Temple Place, Suite 330, Boston, MA 02111-1307 USA
018:
019:          Users who would rather have a commercial license, warranty or support should
020:          contact the following company who invented, built and supports the technology:
021:          
022:                        Custom Credit Systems, Richardson, TX 75081, USA.
023:           	            email: info@thinwire.com    ph: +1 (888) 644-6405
024:         	                        http://www.thinwire.com
025:        #ENDIF
026:         [ v1.2_RC2 ] 
027:         */
028:        package thinwire.render.web;
029:
030:        import java.io.ByteArrayInputStream;
031:        import java.lang.reflect.Field;
032:        import java.lang.reflect.InvocationTargetException;
033:        import java.lang.reflect.Method;
034:        import java.util.ArrayList;
035:        import java.util.Collections;
036:        import java.util.HashMap;
037:        import java.util.List;
038:        import java.util.Map;
039:        import java.util.logging.Level;
040:        import java.util.logging.Logger;
041:        import java.util.regex.Pattern;
042:
043:        import javax.xml.parsers.SAXParser;
044:        import javax.xml.parsers.SAXParserFactory;
045:
046:        import org.xml.sax.Attributes;
047:        import org.xml.sax.SAXException;
048:        import org.xml.sax.helpers.AttributesImpl;
049:        import org.xml.sax.helpers.DefaultHandler;
050:
051:        import thinwire.ui.Application;
052:        import thinwire.ui.style.Background;
053:        import thinwire.ui.style.Border;
054:        import thinwire.ui.style.Color;
055:        import thinwire.ui.style.Font;
056:
057:        /**
058:         * @author Joshua J. Gertzen
059:         * @author Ted C. Howard
060:         */
061:        class RichTextParser extends DefaultHandler {
062:            private static final Logger log = Logger
063:                    .getLogger(RichTextParser.class.getName());
064:            private static final Level LEVEL = Level.FINER;
065:
066:            static final String STYLE_FONT_FAMILY = "ff";
067:            static final String STYLE_COLOR = "fc";
068:            static final String STYLE_FONT_SIZE = "fs";
069:            static final String STYLE_FONT_WEIGHT = "fw";
070:            static final String STYLE_TEXT_DECORATION = "fd";
071:            static final String STYLE_FONT_STYLE = "ft";
072:            static final String STYLE_BORDER_STYLE = "dt";
073:            static final String STYLE_BORDER_WIDTH = "dw";
074:            static final String STYLE_BORDER_COLOR = "dc";
075:            static final String STYLE_BORDER_IMAGE = "di";
076:            static final String STYLE_BACKGROUND_COLOR = "bc";
077:            static final String STYLE_BACKGROUND_POSITION = "bp";
078:            static final String STYLE_BACKGROUND_REPEAT = "br";
079:            static final String STYLE_BACKGROUND_IMAGE = "bi";
080:
081:            private static final String ATTR_HREF = "r";
082:            private static final String ATTR_TARGET = "t";
083:            private static final String ATTR_SRC = "s";
084:            private static final String ATTR_WIDTH = "w";
085:            private static final String ATTR_HEIGHT = "h";
086:
087:            private static final Map<String, Tag> TAGS;
088:            private static final Pattern TAG_REGEX;
089:            static {
090:                Map<String, Tag> tags = new HashMap<String, Tag>();
091:                Map<String, Validator> map = new HashMap<String, Validator>();
092:                map.put("family", new EnumValidator(Font.Family.class,
093:                        STYLE_FONT_FAMILY));
094:                map.put("face", new EnumValidator(Font.Family.class,
095:                        STYLE_FONT_FAMILY));
096:                map.put("color", new EnumValidator(Color.class, STYLE_COLOR));
097:                map.put("size", new NumberValidator(STYLE_FONT_SIZE, 0, 128,
098:                        "pt"));
099:                map.put("bold", new BooleanValidator(STYLE_FONT_WEIGHT, "bold",
100:                        "normal"));
101:                map.put("underline", new BooleanValidator(
102:                        STYLE_TEXT_DECORATION, "underline", "none"));
103:                map.put("strike", new BooleanValidator(STYLE_TEXT_DECORATION,
104:                        "line-through", "none"));
105:                map.put("italic", new BooleanValidator(STYLE_FONT_STYLE,
106:                        "italic", "normal"));
107:                tags.put("font", new Tag(map));
108:                tags.put("b", new Tag(map, "bold", "true"));
109:                tags.put("i", new Tag(map, "italic", "true"));
110:                tags.put("u", new Tag(map, "underline", "true"));
111:                tags.put("s", new Tag(map, "strike", "true"));
112:
113:                map = new HashMap<String, Validator>();
114:                map.put("edge", null);
115:                tags.put("border", new Tag(newBorderSet("")));
116:                tags.put("border left", new Tag(newBorderSet("Left"), map));
117:                tags.put("border right", new Tag(newBorderSet("Right"), map));
118:                tags.put("border top", new Tag(newBorderSet("Top"), map));
119:                tags.put("border bottom", new Tag(newBorderSet("Bottom"), map));
120:
121:                map = new HashMap<String, Validator>();
122:                map.put("color", new EnumValidator(Color.class,
123:                        STYLE_BACKGROUND_COLOR));
124:                map.put("position", new EnumValidator(
125:                        Background.Position.class, STYLE_BACKGROUND_POSITION));
126:                map.put("repeat", new EnumValidator(Background.Repeat.class,
127:                        STYLE_BACKGROUND_REPEAT));
128:                map.put("image", new URLValidator(STYLE_BACKGROUND_IMAGE));
129:                tags.put("background", new Tag(map));
130:
131:                map = new HashMap<String, Validator>();
132:                map.put("href", new URLValidator(ATTR_HREF));
133:                map.put("target", new TargetValidator(ATTR_TARGET));
134:                tags.put("a", new Tag("a", map, true));
135:
136:                map = new HashMap<String, Validator>();
137:                map.put("src", new URLValidator(ATTR_SRC));
138:                map.put("width", new NumberValidator(ATTR_WIDTH, 0,
139:                        Short.MAX_VALUE, null));
140:                map.put("height", new NumberValidator(ATTR_HEIGHT, 0,
141:                        Short.MAX_VALUE, null));
142:                tags.put("img", new Tag("img", map, false));
143:
144:                tags.put("br", new Tag("br", null, false));
145:
146:                StringBuilder sb = new StringBuilder();
147:                sb.append(".*<(?:");
148:
149:                for (String s : tags.keySet()) {
150:                    sb.append(s).append('|');
151:                }
152:
153:                sb.setCharAt(sb.length() - 1, ')');
154:                sb.append(".*");
155:                TAGS = tags;
156:                TAG_REGEX = Pattern.compile(sb.toString());
157:            }
158:
159:            private static Map<String, Validator> newBorderSet(String edge) {
160:                Map<String, Validator> map = new HashMap<String, Validator>();
161:                String side = edge.length() == 0 ? "" : String.valueOf(edge
162:                        .charAt(0));
163:                map.put("type", new EnumValidator(Border.Type.class,
164:                        STYLE_BORDER_STYLE + side));
165:                map.put("size", new NumberValidator(STYLE_BORDER_WIDTH + side,
166:                        0, 32, "px"));
167:                map.put("color", new EnumValidator(Color.class,
168:                        STYLE_BORDER_COLOR + side));
169:                return Collections.unmodifiableMap(map);
170:            }
171:
172:            private static class Tag {
173:                String name = "span";
174:                Map<String, Validator> attrMap;
175:                Map<String, Validator> attrIgnoreMap;
176:                String specificAttrName;
177:                String specificAttrValue;
178:                boolean children = true;
179:
180:                Tag(String name, Map<String, Validator> attrMap,
181:                        boolean children) {
182:                    this .name = name;
183:                    this .attrMap = attrMap;
184:                    this .children = children;
185:                }
186:
187:                Tag(Map<String, Validator> attrMap) {
188:                    this .attrMap = attrMap;
189:                }
190:
191:                Tag(Map<String, Validator> attrMap,
192:                        Map<String, Validator> attrIgnoreMap) {
193:                    this .attrMap = attrMap;
194:                    this .attrIgnoreMap = attrIgnoreMap;
195:                }
196:
197:                Tag(Map<String, Validator> attrMap, String specificAttrName,
198:                        String specificAttrValue) {
199:                    this .attrMap = attrMap;
200:                    this .specificAttrName = specificAttrName;
201:                    this .specificAttrValue = specificAttrValue;
202:                }
203:            }
204:
205:            private static class Depth {
206:                List<Integer[]> tracker = new ArrayList<Integer[]>();
207:                int size;
208:
209:                void reset() {
210:                    tracker.clear();
211:                    size = 0;
212:                }
213:
214:                int add() {
215:                    if (size > 0)
216:                        tracker.get(size - 1)[0]++;
217:                    tracker.add(new Integer[] { 0, 0 });
218:                    ++size;
219:                    return size;
220:                }
221:
222:                void remove() {
223:                    tracker.remove(--size);
224:                }
225:
226:                int children() {
227:                    return tracker.get(size - 1)[0];
228:                }
229:
230:                void setMark(int mark) {
231:                    tracker.get(size - 1)[1] = mark;
232:                }
233:
234:                int getMark() {
235:                    return tracker.get(size - 1)[1];
236:                }
237:
238:                public String toString() {
239:                    return "Depth{size:" + size + ",children:" + children()
240:                            + ",mark:" + getMark() + "}";
241:                }
242:            }
243:
244:            private static class Validator {
245:                String jsPropName;
246:
247:                Validator(String jsPropName) {
248:                    this .jsPropName = jsPropName;
249:                }
250:
251:                String getValue(String value) {
252:                    return value;
253:                }
254:            }
255:
256:            private static class EnumValidator extends Validator {
257:                Class c;
258:
259:                EnumValidator(Class c, String jsPropName) {
260:                    super (jsPropName);
261:                    this .c = c;
262:                }
263:
264:                @Override
265:                public String getValue(String value) {
266:                    String objValue = value;
267:
268:                    try {
269:                        Field f = c.getField(value.toUpperCase().replace('-',
270:                                '_'));
271:                        objValue = f.get(null).toString();
272:                    } catch (NoSuchFieldException e2) {
273:                        try {
274:                            Method m = c.getMethod("valueOf", String.class);
275:                            if (m.getReturnType() != c)
276:                                throw new NoSuchMethodException(
277:                                        "public static " + c
278:                                                + " valueOf(String value)");
279:                            objValue = m.invoke(null, objValue).toString();
280:                        } catch (NoSuchMethodException e) {
281:                            throw new RuntimeException(e);
282:                        } catch (InvocationTargetException e) {
283:                            throw new RuntimeException(e);
284:                        } catch (IllegalAccessException e) {
285:                            throw new RuntimeException(e);
286:                        }
287:                    } catch (IllegalAccessException e2) {
288:                        throw new RuntimeException(e2);
289:                    }
290:
291:                    return objValue;
292:                }
293:            }
294:
295:            private static class BooleanValidator extends Validator {
296:                String trueValueName;
297:                String falseValueName;
298:
299:                BooleanValidator(String jsPropName, String trueValueName,
300:                        String falseValueName) {
301:                    super (jsPropName);
302:                    this .trueValueName = trueValueName;
303:                    this .falseValueName = falseValueName;
304:                }
305:
306:                @Override
307:                public String getValue(String value) {
308:                    return Boolean.valueOf(value) ? trueValueName
309:                            : falseValueName;
310:                }
311:            }
312:
313:            private static class URLValidator extends Validator {
314:
315:                URLValidator(String jsPropName) {
316:                    super (jsPropName);
317:                }
318:
319:                String getValue(String value, ComponentRenderer cr) {
320:                    return cr.getQualifiedURL(value);
321:                }
322:
323:            }
324:
325:            private static class TargetValidator extends Validator {
326:                TargetValidator(String jsPropName) {
327:                    super (jsPropName);
328:                }
329:
330:                @Override
331:                public String getValue(String value) {
332:                    if (value.charAt(0) == '_')
333:                        throw new RuntimeException("value.charAt(0) == '_'");
334:                    return value;
335:                }
336:            }
337:
338:            private static class NumberValidator extends Validator {
339:                int min;
340:                int max;
341:                String units;
342:
343:                NumberValidator(String jsPropName, int min, int max,
344:                        String units) {
345:                    super (jsPropName);
346:                    this .min = min;
347:                    this .max = max;
348:                    this .units = units;
349:                }
350:
351:                @Override
352:                String getValue(String value) {
353:                    int size = Integer.parseInt(value);
354:                    if (size <= min || size > max)
355:                        throw new RuntimeException(jsPropName + " <= " + min
356:                                + " || " + jsPropName + " > " + max);
357:                    return units == null ? String.valueOf(size) : size + units;
358:                }
359:            }
360:
361:            private static final Application.Local<SAXParser> INSTANCE = new Application.Local<SAXParser>() {
362:                public SAXParser initialValue() {
363:                    try {
364:                        return SAXParserFactory.newInstance().newSAXParser();
365:                    } catch (Exception e) {
366:                        if (e instanceof  RuntimeException)
367:                            throw (RuntimeException) e;
368:                        throw new RuntimeException(e);
369:                    }
370:                }
371:            };
372:
373:            private SAXParser parser;
374:            private Depth depth;
375:            private ComponentRenderer renderer;
376:            private StringBuilder sb;
377:
378:            RichTextParser(ComponentRenderer cr) {
379:                parser = INSTANCE.get();
380:                depth = new Depth();
381:                renderer = cr;
382:            }
383:
384:            Object parse(String richText) {
385:                if (richText.indexOf('<') >= 0 && richText.indexOf('>') > 0
386:                        & TAG_REGEX.matcher(richText).matches()) {
387:                    try {
388:                        sb = new StringBuilder();
389:                        depth.reset();
390:                        parser.parse(new ByteArrayInputStream(("<richText>"
391:                                + richText + "</richText>").getBytes()), this );
392:                        if (log.isLoggable(LEVEL))
393:                            log.log(LEVEL, "RICH TEXT: " + sb.toString());
394:                        return sb;
395:                    } catch (Exception e) {
396:                        if (log.isLoggable(LEVEL))
397:                            log.log(LEVEL, "unable to parse rich text:"
398:                                    + richText, e);
399:                        return richText;
400:                    }
401:                } else {
402:                    return richText;
403:                }
404:            }
405:
406:            @Override
407:            public void startDocument() throws SAXException {
408:                sb.append("[");
409:            }
410:
411:            @Override
412:            public void startElement(String uri, String localName,
413:                    String qName, Attributes attr) throws SAXException {
414:                int attrLen = attr.getLength();
415:                int depthSize = depth.add();
416:                if (log.isLoggable(LEVEL))
417:                    log.log(LEVEL, "depth=" + depth + ",uri=" + uri
418:                            + ",localName=" + localName + ",qName=" + qName
419:                            + ",attributes.getLength()=" + attrLen);
420:
421:                if (qName.equals("richText")) {
422:                    if (depthSize > 1)
423:                        throw new SAXException("duplicate top-level element <"
424:                                + qName + ">");
425:                } else {
426:                    if (depthSize == 1)
427:                        throw new SAXException(
428:                                "top-level element <richText> not found");
429:                    Tag tag = TAGS.get(qName);
430:                    if (tag == null)
431:                        throw new SAXException("invalid start of element <"
432:                                + qName + ">");
433:
434:                    if (tag.specificAttrName != null) {
435:                        if (attrLen != 0)
436:                            throw new SAXException("attributes specified for <"
437:                                    + qName + ">");
438:                        attr = new AttributesImpl();
439:                        ((AttributesImpl) attr).addAttribute("",
440:                                tag.specificAttrName, tag.specificAttrName,
441:                                "CDATA", tag.specificAttrValue);
442:                        attrLen++;
443:                    }
444:
445:                    if (attrLen == 0 && tag.attrMap != null)
446:                        throw new SAXException("no attributes specified for <"
447:                                + qName + ">");
448:                    if (attrLen != 0 && tag.attrMap == null)
449:                        throw new SAXException("attributes specified for <"
450:                                + qName + ">");
451:
452:                    if (qName.equals("border") && attr.getValue("edge") != null) {
453:                        if (attrLen < 2)
454:                            throw new SAXException(
455:                                    "no attributes specified for <" + qName
456:                                            + " edge='" + attr.getValue("edge")
457:                                            + "'>");
458:                        sb.append("{t:\"").append(tag.name).append("\",s:{");
459:                        String[] edges = attr.getValue("edge").split(",");
460:
461:                        for (String s : edges) {
462:                            tag = TAGS.get(qName + " " + s);
463:                            if (tag == null)
464:                                throw new SAXException(
465:                                        "invalid <border edge=''> attribute '"
466:                                                + s + "' specified");
467:                            writeAttributes(attr, tag.attrMap,
468:                                    tag.attrIgnoreMap);
469:                        }
470:
471:                        //Close object
472:                        int len = sb.length();
473:                        sb.setCharAt(len - 1, '}');
474:                        sb.append(',');
475:                        depth.setMark(len + 1);
476:                    } else {
477:                        if (qName.equals("a")
478:                                && attr.getValue("target") == null) {
479:                            if (!(attr instanceof  AttributesImpl))
480:                                attr = new AttributesImpl(attr);
481:                            ((AttributesImpl) attr)
482:                                    .addAttribute(
483:                                            "",
484:                                            "target",
485:                                            "target",
486:                                            "CDATA",
487:                                            "a"
488:                                                    + System
489:                                                            .identityHashCode(renderer));
490:                        }
491:
492:                        sb.append("{t:\"").append(tag.name).append("\",")
493:                                .append(tag.name.equals("span") ? "s" : "a")
494:                                .append(":{");
495:                        if (tag.attrMap != null)
496:                            writeAttributes(attr, tag.attrMap, null);
497:                        int index = sb.length() - 1;
498:
499:                        if (sb.charAt(index) == ',') {
500:                            sb.setCharAt(index, '}');
501:                            sb.append(',');
502:                        } else {
503:                            sb.append("},");
504:                        }
505:
506:                        depth.setMark(sb.length());
507:                    }
508:                }
509:            }
510:
511:            @Override
512:            public void characters(char[] ch, int start, int length)
513:                    throws SAXException {
514:                depth.add();
515:                if (log.isLoggable(LEVEL))
516:                    log.log(LEVEL, "depth=" + depth + ",characters="
517:                            + new String(ch, start, length));
518:                sb.append("\"").append(ch, start, length).append("\",");
519:                depth.remove();
520:            }
521:
522:            @Override
523:            public void endElement(String uri, String localName, String qName)
524:                    throws SAXException {
525:                if (log.isLoggable(LEVEL))
526:                    log.log(LEVEL, "depth=" + depth + ",uri=" + uri
527:                            + ",localName=" + localName + ",qName=" + qName);
528:
529:                if (qName.equals("richText")) {
530:                    //if (depth.size > 1) throw new SAXException("duplicate top-level element <" + qName + ">");
531:                } else {
532:                    Tag tag = TAGS.get(qName);
533:                    if (tag == null)
534:                        throw new SAXException("invalid end element </" + qName
535:                                + ">");
536:                    int children = depth.children();
537:
538:                    if (tag.children) {
539:                        //XXX is it an error if there were no children?
540:                        if (children > 0) {
541:                            if (children > 1) {
542:                                sb.insert(depth.getMark(), "c:[");
543:                                sb.setCharAt(sb.length() - 1, ']');
544:                            } else {
545:                                sb.insert(depth.getMark(), "c:");
546:                            }
547:                        } else {
548:                            //XXX Remove entire entry? Or is this an error?
549:                        }
550:                    } else if (children > 0) {
551:                        throw new SAXException("no children allowed for <"
552:                                + qName + "> tag");
553:                    }
554:
555:                    int index = sb.length() - 1;
556:
557:                    if (sb.charAt(index) == ',') {
558:                        sb.setCharAt(index, '}');
559:                        sb.append(',');
560:                    } else {
561:                        sb.append("},");
562:                    }
563:                }
564:
565:                depth.remove();
566:            }
567:
568:            @Override
569:            public void endDocument() throws SAXException {
570:                sb.setCharAt(sb.length() - 1, ']');
571:            }
572:
573:            private void writeAttributes(Attributes attributes,
574:                    Map<String, Validator> attMap,
575:                    Map<String, Validator> ignoreMap) throws SAXException {
576:                for (int i = 0, cnt = attributes.getLength(); i < cnt; i++) {
577:                    String attrName = attributes.getQName(i);
578:
579:                    if (attMap.containsKey(attrName)) {
580:                        Validator v = attMap.get(attrName);
581:                        String value = attributes.getValue(i);
582:
583:                        if (v instanceof  URLValidator) {
584:                            value = ((URLValidator) v)
585:                                    .getValue(value, renderer);
586:                        } else {
587:                            value = v.getValue(value);
588:                        }
589:
590:                        sb.append(v.jsPropName).append(":");
591:                        sb.append("\"").append(value).append("\",");
592:                    } else if (ignoreMap == null
593:                            || !ignoreMap.containsKey(attrName)) {
594:                        throw new SAXException("invalid attribute '" + attrName
595:                                + "' specified");
596:                    }
597:                }
598:            }
599:        }
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