254 // If it's the case just go down cycle (if it's set to "implicit").
255 Component comp = getComponentDownCycle(aComponent, FORWARD_TRAVERSAL);
256 if (comp != null) {
257 return comp;
258 }
259
260 // See if the component is inside of policy provider.
261 Container provider = getTopmostProvider(aContainer, aComponent);
262 if (provider != null) {
263 if (log.isLoggable(PlatformLogger.FINE)) {
264 log.fine("### Asking FTP " + provider + " for component after " + aComponent);
265 }
266
267 // FTP knows how to find component after the given. We don't.
268 FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
269 Component afterComp = policy.getComponentAfter(provider, aComponent);
270
271 // Null result means that we overstepped the limit of the FTP's cycle.
272 // In that case we must quit the cycle, otherwise return the component found.
273 if (afterComp != null) {
274 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### FTP returned " + afterComp);
275 return afterComp;
276 }
277 aComponent = provider;
278 }
279
280 List<Component> cycle = getFocusTraversalCycle(aContainer);
281
282 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is " + cycle + ", component is " + aComponent);
283
284 int index = getComponentIndex(cycle, aComponent);
285
286 if (index < 0) {
287 if (log.isLoggable(PlatformLogger.FINE)) {
288 log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
289 }
290 return getFirstComponent(aContainer);
291 }
292
293 for (index++; index < cycle.size(); index++) {
294 comp = cycle.get(index);
295 if (accept(comp)) {
296 return comp;
297 } else if ((comp = getComponentDownCycle(comp, FORWARD_TRAVERSAL)) != null) {
298 return comp;
299 }
300 }
301
302 if (aContainer.isFocusCycleRoot()) {
343 throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");
344
345 } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
346 throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
347 }
348
349 // See if the component is inside of policy provider.
350 Container provider = getTopmostProvider(aContainer, aComponent);
351 if (provider != null) {
352 if (log.isLoggable(PlatformLogger.FINE)) {
353 log.fine("### Asking FTP " + provider + " for component after " + aComponent);
354 }
355
356 // FTP knows how to find component after the given. We don't.
357 FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
358 Component beforeComp = policy.getComponentBefore(provider, aComponent);
359
360 // Null result means that we overstepped the limit of the FTP's cycle.
361 // In that case we must quit the cycle, otherwise return the component found.
362 if (beforeComp != null) {
363 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### FTP returned " + beforeComp);
364 return beforeComp;
365 }
366 aComponent = provider;
367
368 // If the provider is traversable it's returned.
369 if (accept(aComponent)) {
370 return aComponent;
371 }
372 }
373
374 List<Component> cycle = getFocusTraversalCycle(aContainer);
375
376 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is " + cycle + ", component is " + aComponent);
377
378 int index = getComponentIndex(cycle, aComponent);
379
380 if (index < 0) {
381 if (log.isLoggable(PlatformLogger.FINE)) {
382 log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
383 }
384 return getLastComponent(aContainer);
385 }
386
387 Component comp;
388 Component tryComp;
389
390 for (index--; index>=0; index--) {
391 comp = cycle.get(index);
392 if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
393 return tryComp;
394 } else if (accept(comp)) {
395 return comp;
396 }
407
408 return comp;
409 }
410 return null;
411 }
412
413 /**
414 * Returns the first Component in the traversal cycle. This method is used
415 * to determine the next Component to focus when traversal wraps in the
416 * forward direction.
417 *
418 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
419 * first Component is to be returned
420 * @return the first Component in the traversal cycle of aContainer,
421 * or null if no suitable Component can be found
422 * @throws IllegalArgumentException if aContainer is null
423 */
424 public Component getFirstComponent(Container aContainer) {
425 List<Component> cycle;
426
427 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Getting first component in " + aContainer);
428 if (aContainer == null) {
429 throw new IllegalArgumentException("aContainer cannot be null");
430 }
431
432 if (this.cachedRoot == aContainer) {
433 cycle = this.cachedCycle;
434 } else {
435 cycle = getFocusTraversalCycle(aContainer);
436 }
437
438 if (cycle.size() == 0) {
439 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is empty");
440 return null;
441 }
442 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is " + cycle);
443
444 for (Component comp : cycle) {
445 if (accept(comp)) {
446 return comp;
447 } else if (comp != aContainer &&
448 (comp = getComponentDownCycle(comp, FORWARD_TRAVERSAL)) != null)
449 {
450 return comp;
451 }
452 }
453 return null;
454 }
455
456 /**
457 * Returns the last Component in the traversal cycle. This method is used
458 * to determine the next Component to focus when traversal wraps in the
459 * reverse direction.
460 *
461 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
462 * last Component is to be returned
463 * @return the last Component in the traversal cycle of aContainer,
464 * or null if no suitable Component can be found
465 * @throws IllegalArgumentException if aContainer is null
466 */
467 public Component getLastComponent(Container aContainer) {
468 List<Component> cycle;
469 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Getting last component in " + aContainer);
470
471 if (aContainer == null) {
472 throw new IllegalArgumentException("aContainer cannot be null");
473 }
474
475 if (this.cachedRoot == aContainer) {
476 cycle = this.cachedCycle;
477 } else {
478 cycle = getFocusTraversalCycle(aContainer);
479 }
480
481 if (cycle.size() == 0) {
482 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is empty");
483 return null;
484 }
485 if (log.isLoggable(PlatformLogger.FINE)) log.fine("### Cycle is " + cycle);
486
487 for (int i= cycle.size() - 1; i >= 0; i--) {
488 Component comp = cycle.get(i);
489 if (accept(comp)) {
490 return comp;
491 } else if (comp instanceof Container && comp != aContainer) {
492 Container cont = (Container)comp;
493 if (cont.isFocusTraversalPolicyProvider()) {
494 return cont.getFocusTraversalPolicy().getLastComponent(cont);
495 }
496 }
497 }
498 return null;
499 }
500
501 /**
502 * Returns the default Component to focus. This Component will be the first
503 * to receive focus when traversing down into a new focus traversal cycle
504 * rooted at aContainer. The default implementation of this method
505 * returns the same Component as <code>getFirstComponent</code>.
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254 // If it's the case just go down cycle (if it's set to "implicit").
255 Component comp = getComponentDownCycle(aComponent, FORWARD_TRAVERSAL);
256 if (comp != null) {
257 return comp;
258 }
259
260 // See if the component is inside of policy provider.
261 Container provider = getTopmostProvider(aContainer, aComponent);
262 if (provider != null) {
263 if (log.isLoggable(PlatformLogger.FINE)) {
264 log.fine("### Asking FTP " + provider + " for component after " + aComponent);
265 }
266
267 // FTP knows how to find component after the given. We don't.
268 FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
269 Component afterComp = policy.getComponentAfter(provider, aComponent);
270
271 // Null result means that we overstepped the limit of the FTP's cycle.
272 // In that case we must quit the cycle, otherwise return the component found.
273 if (afterComp != null) {
274 if (log.isLoggable(PlatformLogger.FINE)) {
275 log.fine("### FTP returned " + afterComp);
276 }
277 return afterComp;
278 }
279 aComponent = provider;
280 }
281
282 List<Component> cycle = getFocusTraversalCycle(aContainer);
283
284 if (log.isLoggable(PlatformLogger.FINE)) {
285 log.fine("### Cycle is " + cycle + ", component is " + aComponent);
286 }
287
288 int index = getComponentIndex(cycle, aComponent);
289
290 if (index < 0) {
291 if (log.isLoggable(PlatformLogger.FINE)) {
292 log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
293 }
294 return getFirstComponent(aContainer);
295 }
296
297 for (index++; index < cycle.size(); index++) {
298 comp = cycle.get(index);
299 if (accept(comp)) {
300 return comp;
301 } else if ((comp = getComponentDownCycle(comp, FORWARD_TRAVERSAL)) != null) {
302 return comp;
303 }
304 }
305
306 if (aContainer.isFocusCycleRoot()) {
347 throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");
348
349 } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
350 throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
351 }
352
353 // See if the component is inside of policy provider.
354 Container provider = getTopmostProvider(aContainer, aComponent);
355 if (provider != null) {
356 if (log.isLoggable(PlatformLogger.FINE)) {
357 log.fine("### Asking FTP " + provider + " for component after " + aComponent);
358 }
359
360 // FTP knows how to find component after the given. We don't.
361 FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
362 Component beforeComp = policy.getComponentBefore(provider, aComponent);
363
364 // Null result means that we overstepped the limit of the FTP's cycle.
365 // In that case we must quit the cycle, otherwise return the component found.
366 if (beforeComp != null) {
367 if (log.isLoggable(PlatformLogger.FINE)) {
368 log.fine("### FTP returned " + beforeComp);
369 }
370 return beforeComp;
371 }
372 aComponent = provider;
373
374 // If the provider is traversable it's returned.
375 if (accept(aComponent)) {
376 return aComponent;
377 }
378 }
379
380 List<Component> cycle = getFocusTraversalCycle(aContainer);
381
382 if (log.isLoggable(PlatformLogger.FINE)) {
383 log.fine("### Cycle is " + cycle + ", component is " + aComponent);
384 }
385
386 int index = getComponentIndex(cycle, aComponent);
387
388 if (index < 0) {
389 if (log.isLoggable(PlatformLogger.FINE)) {
390 log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
391 }
392 return getLastComponent(aContainer);
393 }
394
395 Component comp;
396 Component tryComp;
397
398 for (index--; index>=0; index--) {
399 comp = cycle.get(index);
400 if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
401 return tryComp;
402 } else if (accept(comp)) {
403 return comp;
404 }
415
416 return comp;
417 }
418 return null;
419 }
420
421 /**
422 * Returns the first Component in the traversal cycle. This method is used
423 * to determine the next Component to focus when traversal wraps in the
424 * forward direction.
425 *
426 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
427 * first Component is to be returned
428 * @return the first Component in the traversal cycle of aContainer,
429 * or null if no suitable Component can be found
430 * @throws IllegalArgumentException if aContainer is null
431 */
432 public Component getFirstComponent(Container aContainer) {
433 List<Component> cycle;
434
435 if (log.isLoggable(PlatformLogger.FINE)) {
436 log.fine("### Getting first component in " + aContainer);
437 }
438 if (aContainer == null) {
439 throw new IllegalArgumentException("aContainer cannot be null");
440 }
441
442 if (this.cachedRoot == aContainer) {
443 cycle = this.cachedCycle;
444 } else {
445 cycle = getFocusTraversalCycle(aContainer);
446 }
447
448 if (cycle.size() == 0) {
449 if (log.isLoggable(PlatformLogger.FINE)) {
450 log.fine("### Cycle is empty");
451 }
452 return null;
453 }
454 if (log.isLoggable(PlatformLogger.FINE)) {
455 log.fine("### Cycle is " + cycle);
456 }
457
458 for (Component comp : cycle) {
459 if (accept(comp)) {
460 return comp;
461 } else if (comp != aContainer &&
462 (comp = getComponentDownCycle(comp, FORWARD_TRAVERSAL)) != null)
463 {
464 return comp;
465 }
466 }
467 return null;
468 }
469
470 /**
471 * Returns the last Component in the traversal cycle. This method is used
472 * to determine the next Component to focus when traversal wraps in the
473 * reverse direction.
474 *
475 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
476 * last Component is to be returned
477 * @return the last Component in the traversal cycle of aContainer,
478 * or null if no suitable Component can be found
479 * @throws IllegalArgumentException if aContainer is null
480 */
481 public Component getLastComponent(Container aContainer) {
482 List<Component> cycle;
483 if (log.isLoggable(PlatformLogger.FINE)) {
484 log.fine("### Getting last component in " + aContainer);
485 }
486
487 if (aContainer == null) {
488 throw new IllegalArgumentException("aContainer cannot be null");
489 }
490
491 if (this.cachedRoot == aContainer) {
492 cycle = this.cachedCycle;
493 } else {
494 cycle = getFocusTraversalCycle(aContainer);
495 }
496
497 if (cycle.size() == 0) {
498 if (log.isLoggable(PlatformLogger.FINE)) {
499 log.fine("### Cycle is empty");
500 }
501 return null;
502 }
503 if (log.isLoggable(PlatformLogger.FINE)) {
504 log.fine("### Cycle is " + cycle);
505 }
506
507 for (int i= cycle.size() - 1; i >= 0; i--) {
508 Component comp = cycle.get(i);
509 if (accept(comp)) {
510 return comp;
511 } else if (comp instanceof Container && comp != aContainer) {
512 Container cont = (Container)comp;
513 if (cont.isFocusTraversalPolicyProvider()) {
514 return cont.getFocusTraversalPolicy().getLastComponent(cont);
515 }
516 }
517 }
518 return null;
519 }
520
521 /**
522 * Returns the default Component to focus. This Component will be the first
523 * to receive focus when traversing down into a new focus traversal cycle
524 * rooted at aContainer. The default implementation of this method
525 * returns the same Component as <code>getFirstComponent</code>.
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