Source Code Cross Referenced for AnimateMotion.java in  » 6.0-JDK-Modules » j2me » com » sun » perseus » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.perseus.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
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 version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:
027:        package com.sun.perseus.model;
028:
029:        import com.sun.perseus.platform.MathSupport;
030:
031:        import com.sun.perseus.util.SVGConstants;
032:
033:        import org.w3c.dom.DOMException;
034:
035:        import org.w3c.dom.svg.SVGElement;
036:
037:        import java.util.Vector;
038:
039:        /**
040:         * <code>AnimateMotion</code> represents an SVG Tiny 
041:         * <code>&lt;animateMotion&gt;</code> element.
042:         *
043:         * @version $Id: AnimateMotion.java,v 1.5 2006/06/29 10:47:29 ln156897 Exp $
044:         */
045:        public class AnimateMotion extends AbstractAnimate {
046:            /**
047:             * Rotate type when an angle is specified in the rotate attribute.
048:             */
049:            static final int ROTATE_ANGLE = 1;
050:
051:            /**
052:             * Rotate type when the rotate attribute is set to auto.
053:             */
054:            static final int ROTATE_AUTO = 2;
055:
056:            /**
057:             * Rotate type when the rotate attribute is set to auto-reverse
058:             */
059:            static final int ROTATE_AUTO_REVERSE = 3;
060:
061:            /**
062:             * The path attribute value.
063:             */
064:            String path;
065:
066:            /**
067:             * The keyPoints attribute value
068:             */
069:            float[] keyPoints;
070:
071:            /**
072:             * The rotate angle. Used if rotateType is ROTATE_ANGLE
073:             */
074:            float rotate;
075:
076:            /**
077:             * The rotation's cos value
078:             */
079:            float cosRotate = 1;
080:
081:            /**
082:             * The rotation angle's sin value.
083:             */
084:            float sinRotate;
085:
086:            /**
087:             * The rotate type. One of ROTATE_ANGLE (an angle was specified) or
088:             * ROTATE_AUTO, ROTATE_AUTO_REVERSE
089:             */
090:            int rotateType = ROTATE_ANGLE;
091:
092:            /**
093:             * Used, temporarily, to hold the refValues for the path attribute.
094:             */
095:            RefValues pathRefValues;
096:
097:            /**
098:             * Used, temporarily, to hold the refValues for mpath child.
099:             */
100:            RefValues mpathRefValues;
101:
102:            /**
103:             * Builds a new AnimateMotion element that belongs to the given
104:             * document. This <code>AnimateMotion</code> will belong 
105:             * to the <code>DocumentNode</code>'s time container.
106:             *
107:             * @param ownerDocument the document this node belongs to.
108:             * @throws IllegalArgumentException if the input ownerDocument is null
109:             */
110:            public AnimateMotion(final DocumentNode ownerDocument) {
111:                super (ownerDocument, SVGConstants.SVG_ANIMATE_MOTION_TAG);
112:
113:                // Default calcMode for animateMotion is paced.
114:                calcMode = CALC_MODE_PACED;
115:
116:                // AnimateMotion operates on a fixed trait name
117:                traitName = SVGConstants.SVG_MOTION_PSEUDO_ATTRIBUTE;
118:            }
119:
120:            /**
121:             * Used by <code>DocumentNode</code> to create a new instance from
122:             * a prototype <code>TimedElementNode</code>.
123:             *
124:             * @param doc the <code>DocumentNode</code> for which a new node is
125:             *        should be created.
126:             * @return a new <code>TimedElementNode</code> for the requested document.
127:             */
128:            public ElementNode newInstance(final DocumentNode doc) {
129:                return new AnimateMotion(doc);
130:            }
131:
132:            /**
133:             * @param traitName the name of the trait which the element may support.
134:             * @return true if this element supports the given trait in one of the
135:             *         trait accessor methods.
136:             */
137:            boolean supportsTrait(final String traitName) {
138:                if (SVGConstants.SVG_PATH_ATTRIBUTE == traitName
139:                        || SVGConstants.SVG_KEY_POINTS_ATTRIBUTE == traitName
140:                        || SVGConstants.SVG_ROTATE_ATTRIBUTE == traitName) {
141:                    return true;
142:                } else {
143:                    return super .supportsTrait(traitName);
144:                }
145:            }
146:
147:            // JAVADOC COMMENT ELIDED
148:            public String getTraitImpl(final String name) throws DOMException {
149:                if (SVGConstants.SVG_PATH_ATTRIBUTE == name) {
150:                    return path;
151:                } else if (SVGConstants.SVG_KEY_POINTS_ATTRIBUTE == name) {
152:                    return toStringTrait(keyPoints);
153:                } else if (SVGConstants.SVG_ROTATE_ATTRIBUTE == name) {
154:                    switch (rotateType) {
155:                    case ROTATE_ANGLE:
156:                        return Float.toString(rotate);
157:                    case ROTATE_AUTO:
158:                        return SVGConstants.SVG_AUTO_VALUE;
159:                    case ROTATE_AUTO_REVERSE:
160:                    default:
161:                        return SVGConstants.SVG_AUTO_REVERSE_VALUE;
162:                    }
163:                } else {
164:                    return super .getTraitImpl(name);
165:                }
166:            }
167:
168:            /**
169:             * The following call lets the animate implementation map 
170:             * the time segment indices and the time segment penetration
171:             * into refValues indices and penetration, in case these are
172:             * different. Typically, these are the same, but they may be
173:             * different, for example in the case of animateMotion with
174:             * keyPoints.
175:             *
176:             * @param si the time segment index.
177:             * @param sp the segment penetration.
178:             * @param sisp an array where the mapped si and sp value should
179:             *        be stored. si is at index 0 and sp at index 1.
180:             */
181:            protected void mapToSegmentProgress(final int si, final float sp,
182:                    final float[] sisp) {
183:                // animateMotion also maps to segments directly unless there
184:                // is a keyPoints attribute specified, in which case it 
185:                // overrides the default behavior.
186:                if (keyPoints == null || actualCalcMode == CALC_MODE_PACED) {
187:                    super .mapToSegmentProgress(si, sp, sisp);
188:                    return;
189:                }
190:
191:                // We are dealing with a keyPoints animateMotion.
192:                // We only do the computation on the first component, because
193:                // the input and output indices for animateMotion with keyTimes
194:                // should be the same on all components (by definition).
195:                float startDist = keyPoints[si];
196:                float endDist = keyPoints[si + 1];
197:
198:                float dist = sp * endDist + (1 - sp) * startDist;
199:
200:                // Now that we know how far along we should be on the path, 
201:                // find the corresponding segment.
202:                ((MotionRefValues) refValues).getSegmentAtDist(sisp, dist);
203:            }
204:
205:            /**
206:             * @param name the trait's name.
207:             * @param value the trait's value.
208:             *
209:             * @throws DOMException with error code NOT_SUPPORTED_ERR if the requested
210:             * trait is not supported on this element or null.
211:             * @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
212:             * trait's value cannot be specified as a String
213:             * @throws DOMException with error code INVALID_ACCESS_ERR if the input
214:             * value is an invalid value for the given trait or null.
215:             * @throws DOMException with error code NO_MODIFICATION_ALLOWED_ERR: if
216:             * attempt is made to change readonly trait.
217:             */
218:            public void setTraitImpl(final String name, final String value)
219:                    throws DOMException {
220:                if (SVGConstants.SVG_PATH_ATTRIBUTE == name) {
221:                    checkWriteLoading(name);
222:                    // path values are validated in the validate() method,
223:                    // just like to/from/by and values are
224:                    path = value;
225:                } else if (SVGConstants.SVG_KEY_POINTS_ATTRIBUTE == name) {
226:                    checkWriteLoading(name);
227:                    keyPoints = parseFloatArrayTrait(name, value, ';');
228:                } else if (SVGConstants.SVG_ROTATE_ATTRIBUTE == name) {
229:                    checkWriteLoading(name);
230:
231:                    if (SVGConstants.SVG_AUTO_VALUE.equals(value)) {
232:                        rotate = 0;
233:                        rotateType = ROTATE_AUTO;
234:                    } else if (SVGConstants.SVG_AUTO_REVERSE_VALUE
235:                            .equals(value)) {
236:                        rotate = 0;
237:                        rotateType = ROTATE_AUTO_REVERSE;
238:                    } else {
239:                        // The value is neither 'auto' nor 'auto-reverse'. It 
240:                        // must be an angle value.
241:                        rotate = parseFloatTrait(name, value);
242:                        cosRotate = MathSupport.cos(MathSupport
243:                                .toRadians(rotate));
244:                        sinRotate = MathSupport.sin(MathSupport
245:                                .toRadians(rotate));
246:                        rotateType = ROTATE_ANGLE;
247:                    }
248:                } else {
249:                    super .setTraitImpl(name, value);
250:                }
251:            }
252:
253:            /**
254:             * Computes refTimes from the calcMode and keyTimes attributes. Validates
255:             * that the keyTimes attribute is compatible with the animate set up. This
256:             * may be overridden by subclasses (e.g., animateMotion), when there are 
257:             * special rules for checking keyTimes compatiblity.
258:             */
259:            protected void computeRefTimes() throws DOMException {
260:                // if there is no keyPoints defined or if the calcMode is
261:                // paced, we use the default behavior.
262:                if (keyPoints == null || actualCalcMode == CALC_MODE_PACED) {
263:                    super .computeRefTimes();
264:                    return;
265:                }
266:
267:                // Check keyTimes is compatible with the animation specification.
268:                // 
269:                // a) keyTimes should be specified (i.e., not null)
270:                //
271:                // b) In all cases, the first keyTime must be zero.
272:                // 
273:                // c) For non-discrete animations, the last keyTime must be one.
274:                //
275:                // d) There should be as many keyTimes as there are keyPoints
276:                //
277:                if (/* a) */keyTimes == null
278:                        ||
279:                        /* b) */keyTimes.length < 1
280:                        || keyTimes[0] != 0
281:                        ||
282:                        /* c) */(actualCalcMode != CALC_MODE_DISCRETE && keyTimes[keyTimes.length - 1] != 1)
283:                        ||
284:                        /* d) */keyTimes.length != keyPoints.length) {
285:                    throw animationError(
286:                            idRef,
287:                            traitNamespace,
288:                            traitName,
289:                            targetElement.getNamespaceURI(),
290:                            targetElement.getLocalName(),
291:                            getId(),
292:                            getNamespaceURI(),
293:                            getLocalName(),
294:                            Messages
295:                                    .formatMessage(
296:                                            Messages.ERROR_INVALID_ANIMATION_KEY_TIMES,
297:                                            new Object[] { getTrait(SVGConstants.SVG_KEY_TIMES_ATTRIBUTE) }));
298:                }
299:
300:                // If the calcMode is _not_ discrete, we trim the last '1' 
301:                // value.
302:                if (actualCalcMode != CALC_MODE_DISCRETE) {
303:                    refTimes = new float[keyTimes.length - 1];
304:                    System.arraycopy(keyTimes, 0, refTimes, 0, refTimes.length);
305:                } else {
306:                    refTimes = keyTimes;
307:                }
308:            }
309:
310:            /**
311:             * Validates the path and mpath values sources.
312:             *
313:             * @throws DOMException if there is a validation error, for example if the
314:             *         to value is incompatible with the target trait or if the target
315:             *         trait is not animatable.
316:             */
317:            final void validateValuesExtra() throws DOMException {
318:                // Validate the path attribute value
319:                pathRefValues = null;
320:                if (path != null) {
321:                    pathRefValues = traitAnim.toRefValues(this ,
322:                            new String[] { path }, null,
323:                            SVGConstants.SVG_PATH_ATTRIBUTE);
324:                }
325:
326:                // Now, validate the mpath child, if any.
327:                mpathRefValues = null;
328:                SVGElement c = (SVGElement) getFirstElementChild();
329:                SVGElement mpath = null;
330:                while (c != null) {
331:                    if (SVGConstants.SVG_MPATH_TAG.equals(c.getLocalName())
332:                            && SVGConstants.SVG_NAMESPACE_URI.equals(c
333:                                    .getNamespaceURI())) {
334:                        mpath = c;
335:                        break;
336:                    }
337:                    c = (SVGElement) c.getNextElementSibling();
338:                }
339:
340:                if (mpath != null) {
341:                    String pathHref = ((ElementNode) mpath).getTraitNSImpl(
342:                            SVGConstants.XLINK_NAMESPACE_URI,
343:                            SVGConstants.SVG_HREF_ATTRIBUTE);
344:                    if (pathHref != null) {
345:                        boolean pathHrefError = false;
346:                        if (pathHref.startsWith("#")) {
347:                            String pathId = pathHref.substring(1);
348:                            ElementNode path = (ElementNode) ownerDocument
349:                                    .getElementById(pathId);
350:                            if (path != null) {
351:                                mpathRefValues = traitAnim
352:                                        .toRefValues(
353:                                                this ,
354:                                                new String[] { path
355:                                                        .getTraitImpl(SVGConstants.SVG_D_ATTRIBUTE) },
356:                                                null,
357:                                                SVGConstants.SVG_D_ATTRIBUTE);
358:                            } else {
359:                                pathHrefError = true;
360:                            }
361:                        } else {
362:                            pathHrefError = true;
363:                        }
364:
365:                        if (pathHrefError) {
366:                            throw animationError(idRef, traitNamespace,
367:                                    traitName, targetElement.getNamespaceURI(),
368:                                    targetElement.getLocalName(), getId(),
369:                                    getNamespaceURI(), getLocalName(),
370:                                    Messages.formatMessage(
371:                                            Messages.ERROR_INVALID_MPATH_HREF,
372:                                            new Object[] { pathHref }));
373:                        }
374:                    } else {
375:                        throw animationError(
376:                                idRef,
377:                                traitNamespace,
378:                                traitName,
379:                                targetElement.getNamespaceURI(),
380:                                targetElement.getLocalName(),
381:                                getId(),
382:                                getNamespaceURI(),
383:                                getLocalName(),
384:                                Messages
385:                                        .formatMessage(
386:                                                Messages.ERROR_MISSING_MPATH_HREF,
387:                                                null));
388:                    }
389:                }
390:            }
391:
392:            /**
393:             * Computes the 'right' source for reference values, depending on the 
394:             * precedence rules for the different values sources. 
395:             *
396:             * @throws DOMException if there is no way to compute a set of reference
397:             *         values, for example if none of the values sources is specified.
398:             */
399:            final void selectRefValuesExtra() throws DOMException {
400:                if (mpathRefValues != null) {
401:                    refValues = mpathRefValues;
402:                } else if (pathRefValues != null) {
403:                    refValues = pathRefValues;
404:                }
405:            }
406:
407:        }
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