src/animation.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * animation.cpp: Animation engine
   4  *
   5  * Contact:
   6  *   Moonlight List (moonlight-list@lists.ximian.com)
   7  *
   8  * Copyright 2007 Novell, Inc. (http://www.novell.com)
   9  *
  10  * See the LICENSE file included with the distribution for details.
  11  *
  12  */
  13
  14 #include <config.h>
  15
  16 #include <glib.h>
  17
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <math.h>
  21
  22 #include "application.h"
  23 #include "timemanager.h"
  24 #include "animation.h"
  25
  26 #include "color.h"
  27 #include "runtime.h"
  28 #include "utils.h"
  29
  30 #define LERP(f,t,p) ((f) + ((t) - (f)) * (p))
  31
  32 #define KEYSPLINE_PRECISION_LEVEL 4
  33
  34 // This is 2 to power of KEYSPLINE_PRECISION_LEVEL
  35 #define KEYSPLINE_TOTAL_COUNT 16
  36
  37 KeyTime KeyTime::Paced (KeyTime::PACED);
  38 KeyTime KeyTime::Uniform (KeyTime::UNIFORM);
  39
  40 /*
  41 AnimationStorage sits between an DependencyObject and a DependencyProperty.
  42 The AnimationClock creates a storage for DO, and the storage attaches itself to
  43 a DP. The DP keeps a list (hashtable) keyed by the DO pointer.
  44
  45 The storage can be deleted when
  46 - The DP when it's clearing its list of storage objects. This happens when the DP
  47 is destroyed.
  48 - The AnimationClock is destroyed.
  49 - A new storage is created for the same dependencyobject. In this case, the previous
  50 storage that was on the list for the DO is replaced.
  51
  52 This means the storage can disappear but both the DependencyProperty and the
  53 DependencyObject (and AnimationClock) that it referenced might still be
  54 alive. It is very important that when the storage is removed, the
  55 corresponding references to it be cleared, too - this means removing it
  56 from the DP list when it is deleted by the clock, or removing it from the clock
  57 when it's deleted by the DP, as well as clearing any event handlers that could
  58 still fire up after it's dead.
  59 */
  60
  61
  62 AnimationStorage::AnimationStorage (AnimationClock *clock, Animation *timeline,
  63                                     DependencyObject *targetobj, DependencyProperty *targetprop)
  64 : baseValue(NULL), stopValue(NULL), disabled(false)
  65 {
  66         this->clock = clock;
  67         this->timeline = timeline;
  68         this->targetobj = targetobj;
  69         this->targetprop = targetprop;
  70
  71         AttachUpdateHandler ();
  72         AttachTargetHandler ();
  73
  74         AnimationStorage *prev_storage = targetobj->AttachAnimationStorage (targetprop, this);
  75
  76         baseValue = targetobj->GetValue (targetprop);
  77         if (baseValue)
  78                 baseValue = new Value(*baseValue);
  79         else
  80                 baseValue = new Value (targetprop->GetPropertyType ());
  81
  82         if (prev_storage) {
  83                 Value *v = prev_storage->GetResetValue ();
  84                 stopValue = new Value (*v);
  85         }
  86 }
  87
  88 bool
  89 AnimationStorage::IsCurrentStorage ()
  90 {
  91         if (targetobj == NULL || targetprop == NULL)
  92                 return false;
  93
  94         if (targetobj->GetAnimationStorageFor (targetprop) == this)
  95                 return true;
  96
  97         return false;
  98 }
  99
 100
 101 void
 102 AnimationStorage::SwitchTarget (DependencyObject *target)
 103 {
 104         bool wasDisabled = disabled;
 105         if (!disabled)
 106                 Disable ();
 107         targetobj = target;
 108         if (!wasDisabled) {
 109                 AttachTargetHandler ();
 110                 AttachUpdateHandler ();
 111         }
 112         disabled = wasDisabled;
 113 }
 114
 115 void
 116 AnimationStorage::Enable ()
 117 {
 118         if (!disabled)
 119                 return;
 120
 121         AttachTargetHandler ();
 122         AttachUpdateHandler ();
 123         disabled = false;
 124         UpdatePropertyValue ();
 125 }
 126
 127 void
 128 AnimationStorage::Disable ()
 129 {
 130         DetachUpdateHandler ();
 131         DetachTargetHandler ();
 132         disabled = true;
 133 }
 134
 135 void
 136 AnimationStorage::Stop ()
 137 {
 138         ResetPropertyValue ();
 139 }
 140
 141 Value*
 142 AnimationStorage::GetResetValue ()
 143 {
 144         if (stopValue)
 145                 return stopValue;
 146         else
 147                 return baseValue;
 148 }
 149
 150 void
 151 AnimationStorage::SetStopValue (Value *value)
 152 {
 153         if (stopValue)
 154                 delete stopValue;
 155
 156         if (value)
 157                 stopValue = new Value (*value);
 158         else
 159                 stopValue = NULL;
 160 }
 161 // End of public methods
 162
 163 // Private methods
 164 void
 165 AnimationStorage::target_object_destroyed (EventObject *, EventArgs *, gpointer closure)
 166 {
 167         ((AnimationStorage*)closure)->TargetObjectDestroyed ();
 168 }
 169
 170 void
 171 AnimationStorage::TargetObjectDestroyed ()
 172 {
 173         DetachUpdateHandler ();
 174         targetobj = NULL;
 175 }
 176
 177
 178 void
 179 AnimationStorage::update_property_value (EventObject *, EventArgs *, gpointer closure)
 180 {
 181         ((AnimationStorage*)closure)->UpdatePropertyValue ();
 182 }
 183
 184 void
 185 AnimationStorage::UpdatePropertyValue ()
 186 {
 187         if (!targetobj) return;
 188
 189         Value *current_value = clock->GetCurrentValue (baseValue, stopValue ? stopValue : baseValue);
 190         if (current_value != NULL && timeline->GetTimelineStatus () == Timeline::TIMELINE_STATUS_OK) {
 191                 Applier *applier = clock->GetTimeManager ()->GetApplier ();
 192                 applier->AddPropertyChange (targetobj, targetprop, new Value (*current_value), APPLIER_PRECEDENCE_ANIMATION);
 193         }
 194
 195         delete current_value;
 196 }
 197
 198 void
 199 AnimationStorage::ResetPropertyValue ()
 200 {
 201         if (disabled) return;
 202
 203         if (targetobj == NULL || targetprop == NULL)
 204                 return;
 205
 206         if (timeline->GetTimelineStatus () != Timeline::TIMELINE_STATUS_OK)
 207                 return;
 208
 209         Applier *applier = clock->GetTimeManager ()->GetApplier ();
 210
 211         if (applier)
 212                 applier->AddPropertyChange (targetobj, targetprop,
 213                             new Value (*GetResetValue ()),
 214                             APPLIER_PRECEDENCE_ANIMATION_RESET);
 215 }
 216
 217 void
 218 AnimationStorage::DetachFromProperty ()
 219 {
 220         if (targetobj == NULL || targetprop == NULL)
 221                 return;
 222         targetobj->DetachAnimationStorage (targetprop, this);
 223 }
 224
 225 void
 226 AnimationStorage::AttachUpdateHandler ()
 227 {
 228         if (!clock) return;
 229         clock->AddHandler (Clock::CurrentTimeInvalidatedEvent, update_property_value, this);
 230 }
 231
 232
 233 void
 234 AnimationStorage::DetachUpdateHandler ()
 235 {
 236         if (disabled) return;
 237         if (!clock) return;
 238         clock->RemoveHandler (Clock::CurrentTimeInvalidatedEvent, update_property_value, this);
 239 }
 240
 241 void
 242 AnimationStorage::AttachTargetHandler ()
 243 {
 244         if (!targetobj) return;
 245         targetobj->AddHandler (EventObject::DestroyedEvent, target_object_destroyed, this);
 246 }
 247
 248 void
 249 AnimationStorage::DetachTargetHandler ()
 250 {
 251         if (disabled) return;
 252         if (!targetobj) return;
 253         targetobj->RemoveHandler (EventObject::DestroyedEvent, target_object_destroyed, this);
 254 }
 255
 256 AnimationStorage::~AnimationStorage ()
 257 {
 258         DetachTargetHandler ();
 259         DetachUpdateHandler ();
 260         DetachFromProperty ();
 261
 262         if (clock != NULL)
 263                 clock->DetachStorage ();
 264
 265         if (baseValue) {
 266                 delete baseValue;
 267                 baseValue = NULL;
 268         }
 269
 270         if (stopValue) {
 271                 delete stopValue;
 272                 stopValue = NULL;
 273         }
 274 }
 275
 276 AnimationClock::AnimationClock (Animation *timeline)
 277   : Clock (timeline)
 278 {
 279         SetObjectType (Type::ANIMATIONCLOCK);
 280
 281         this->timeline = timeline;
 282         storage = NULL;
 283 }
 284
 285 AnimationStorage *
 286 AnimationClock::HookupStorage (DependencyObject *targetobj, DependencyProperty *targetprop)
 287 {
 288         /* Before hooking up make sure that the values our animation generates
 289            (doubles, colors, points...) match the values that the property is
 290            ready to receive. If not, print an informative message. */
 291         Type *property_type = Type::Find (targetprop->GetPropertyType());
 292         if (timeline->GetValueKind () != Type::INVALID && !property_type->IsAssignableFrom (timeline->GetValueKind ())) {
 293                 Type *timeline_type = Type::Find (timeline->GetValueKind ());
 294
 295                 const char *timeline_type_name = (timeline_type != NULL) ? timeline_type->GetName () : "Invalid";
 296                 const char *property_type_name = (property_type != NULL) ? property_type->GetName () : "Invalid";
 297                 g_warning ("%s.%s property value type is '%s' but animation type is '%s'.",
 298                            targetobj->GetTypeName (), targetprop->GetName(),
 299                            property_type_name, timeline_type_name);
 300
 301                 return false;
 302         }
 303
 304         char *name = g_strdup_printf ("AnimationClock for %s, targetobj = %p/%s, targetprop = %s", GetTypeName(),
 305                                       targetobj,
 306                                       targetobj->GetName(),
 307                                       targetprop->GetName());
 308         SetName (name);
 309
 310         g_free (name);
 311
 312         if (storage)
 313                 delete storage;
 314         storage = new AnimationStorage (this, timeline, targetobj, targetprop);
 315         return storage;
 316 }
 317
 318 Value*
 319 AnimationClock::GetCurrentValue (Value* defaultOriginValue, Value* defaultDestinationValue)
 320 {
 321         return timeline->GetCurrentValue (defaultOriginValue, defaultDestinationValue, this);
 322 }
 323
 324 void
 325 AnimationClock::Stop ()
 326 {
 327         if (storage) {
 328                 storage->Stop ();
 329                 delete storage;
 330                 storage = NULL;
 331         }
 332
 333         Clock::Stop ();
 334 }
 335
 336 void
 337 AnimationClock::Begin (TimeSpan parentTime)
 338 {
 339         Clock::Begin (parentTime);
 340 }
 341
 342 AnimationClock::~AnimationClock ()
 343 {
 344         if (storage) {
 345                 delete storage;
 346                 storage = NULL;
 347         }
 348 }
 349
 350 void
 351 AnimationClock::DetachStorage ()
 352 {
 353         storage = NULL;
 354 }
 355
 356 Clock*
 357 Animation::AllocateClock()
 358 {
 359         clock = new AnimationClock (this);
 360
 361         AttachCompletedHandler ();
 362
 363         return clock;
 364 }
 365
 366 Value*
 367 Animation::GetTargetValue (Value* defaultOriginValue)
 368 {
 369         return NULL;
 370 }
 371
 372 Value*
 373 Animation::GetCurrentValue (Value* defaultOriginValue, Value* defaultDestinationValue,
 374                                         AnimationClock* animationClock)
 375 {
 376         return NULL;
 377 }
 378
 379
 380 Duration
 381 Animation::GetNaturalDurationCore (Clock* clock)
 382 {
 383         return Duration::FromSeconds (1);
 384 }
 385
 386
 387
 388
 389 /* storyboard */
 390
 391 Storyboard::Storyboard ()
 392 {
 393         SetObjectType (Type::STORYBOARD);
 394 }
 395
 396 Storyboard::~Storyboard ()
 397 {
 398         if (clock) {
 399                 StopWithError (/* ignore any error */ NULL);
 400         }
 401 }
 402
 403 TimeSpan
 404 Storyboard::GetCurrentTime ()
 405 {
 406         return GetClock() ? GetClock()->GetCurrentTime () : 0;
 407 }
 408
 409 int
 410 Storyboard::GetCurrentState ()
 411 {
 412         return GetClock() ? GetClock()->GetClockState () : Clock::Stopped;
 413 }
 414
 415 DependencyProperty *
 416 Storyboard::GetTargetDependencyProperty ()
 417 {
 418         PropertyPath *path = GetTargetProperty (this);
 419         return path ? path->property : NULL;
 420 }
 421
 422 bool
 423 Storyboard::HookupAnimationsRecurse (Clock *clock, DependencyObject *targetObject, PropertyPath *targetPropertyPath, GHashTable *promoted_values, MoonError *error)
 424 {
 425         DependencyObject *localTargetObject = NULL;
 426         PropertyPath *localTargetPropertyPath = NULL;
 427
 428         Timeline *timeline = clock->GetTimeline ();
 429
 430         /* get the target object at this level */
 431         if (timeline->HasManualTarget ())
 432                 localTargetObject = timeline->GetManualTarget ();
 433         else {
 434                 const char *targetName = Storyboard::GetTargetName (timeline);
 435                 if (targetName)
 436                         localTargetObject = FindName (targetName);
 437         }
 438
 439         /* get the target property path at this level */
 440         localTargetPropertyPath = Storyboard::GetTargetProperty (timeline);
 441
 442
 443         /* override the object and property passed from our parent here */
 444         if (localTargetObject != NULL)
 445                 targetObject = localTargetObject;
 446
 447         if (localTargetPropertyPath != NULL)
 448                 targetPropertyPath = localTargetPropertyPath;
 449
 450
 451         if (clock->Is (Type::CLOCKGROUP)) {
 452                 for (GList *l = ((ClockGroup*)clock)->child_clocks; l; l = l->next) {
 453                         if (!HookupAnimationsRecurse ((Clock*)l->data,
 454                                                       targetObject,
 455                                                       targetPropertyPath,
 456                                                       promoted_values,
 457                                                       error))
 458                                 return false;
 459                 }
 460         }
 461         else {
 462                 DependencyProperty *prop = NULL;
 463                 DependencyObject *realTargetObject;
 464
 465                 if (!targetPropertyPath) {
 466                         MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Target Property has not been specified.");
 467                         g_warning ("No target property!");
 468                         return false;
 469                 }
 470
 471                 if (!targetObject) {
 472                         MoonError::FillIn (error, MoonError::INVALID_OPERATION, "No Target or TargetName has been specified");
 473                         return false;
 474                 }
 475
 476                 realTargetObject = targetObject;
 477
 478                 prop = resolve_property_path (&realTargetObject, targetPropertyPath, promoted_values);
 479
 480                 if (!prop || !realTargetObject) {
 481                         MoonError::FillIn (error, MoonError::INVALID_OPERATION, "TargetProperty could not be resolved");
 482                         g_warning ("No property path %s on object of type type %s!",
 483                                    targetPropertyPath->path, targetObject->GetTypeName());
 484                         return false;
 485                 }
 486
 487                 if (clock->Is(Type::ANIMATIONCLOCK)) {
 488                         Animation *animation = (Animation*)timeline;
 489
 490                         if (!animation->Resolve (realTargetObject, prop)) {
 491                                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Storyboard value could not be converted to the correct type");
 492                                 return false;
 493                         }
 494
 495                         if (!((AnimationClock*)clock)->HookupStorage (realTargetObject, prop))
 496                                 return false;
 497                 }
 498         }
 499
 500         return true;
 501 }
 502
 503 bool
 504 Storyboard::BeginWithError (MoonError *error)
 505 {
 506         if (GetHadParent ()) {
 507                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Begin a Storyboard which is not the root Storyboard.");
 508                 return false;
 509         }
 510
 511         /* destroy the clock hierarchy and recreate it to restart.
 512            easier than making Begin work again with the existing clock
 513            hierarchy */
 514         if (clock) {
 515                 DetachCompletedHandler ();
 516                 clock->Dispose ();
 517         }
 518
 519         if (Validate () == false)
 520                 return false;
 521
 522         // This creates the clock tree for the hierarchy.  if a
 523         // Timeline A is a child of TimelineGroup B, then Clock cA
 524         // will be a child of ClockGroup cB.
 525         AllocateClock ();
 526         char *name = g_strdup_printf ("Storyboard, named '%s'", GetName());
 527         clock->SetValue (DependencyObject::NameProperty, name);
 528         g_free (name);
 529
 530
 531         // walk the clock tree hooking up the correct properties and
 532         // creating AnimationStorage's for AnimationClocks.
 533         GHashTable *promoted_values = g_hash_table_new (g_direct_hash, g_direct_equal);
 534         if (!HookupAnimationsRecurse (clock, NULL, NULL, promoted_values, error)) {
 535                 g_hash_table_destroy (promoted_values);
 536                 return false;
 537         }
 538         g_hash_table_destroy (promoted_values);
 539
 540         Deployment::GetCurrent()->GetSurface()->GetTimeManager()->AddClock (clock);
 541
 542         if (GetBeginTime() == 0)
 543                 clock->BeginOnTick ();
 544
 545         return true;
 546 }
 547
 548 void
 549 Storyboard::PauseWithError (MoonError *error)
 550 {
 551         if (GetHadParent ()) {
 552                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Pause a Storyboard which is not the root Storyboard.");
 553                 return;
 554         }
 555         if (clock)
 556                 clock->Pause ();
 557 }
 558
 559 void
 560 Storyboard::ResumeWithError (MoonError *error)
 561 {
 562         if (GetHadParent ()) {
 563                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Resume a Storyboard which is not the root Storyboard.");
 564                 return;
 565         }
 566         if (clock)
 567                 clock->Resume ();
 568 }
 569
 570 void
 571 Storyboard::SeekWithError (TimeSpan timespan, MoonError *error)
 572 {
 573         if (GetHadParent ()) {
 574                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Seek a Storyboard which is not the root Storyboard.");
 575                 return;
 576         }
 577         if (clock)
 578                 clock->Seek (timespan);
 579 }
 580
 581 void
 582 Storyboard::SeekAlignedToLastTickWithError (TimeSpan timespan, MoonError *error)
 583 {
 584         if (GetHadParent ()) {
 585                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Seek a Storyboard which is not the root Storyboard.");
 586                 return;
 587         }
 588         if (clock)
 589                 clock->SeekAlignedToLastTick (timespan);
 590 }
 591
 592 void
 593 Storyboard::SkipToFillWithError (MoonError *error)
 594 {
 595         if (GetHadParent ()) {
 596                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot SkipToFill a Storyboard which is not the root Storyboard.");
 597                 return;
 598         }
 599         if (clock) {
 600                 clock->SkipToFill ();
 601         }
 602 }
 603
 604 void
 605 Storyboard::StopWithError (MoonError *error)
 606 {
 607         if (GetHadParent ()) {
 608                 MoonError::FillIn (error, MoonError::INVALID_OPERATION, "Cannot Stop a Storyboard which is not the root Storyboard.");
 609                 return;
 610         }
 611         if (clock) {
 612                 DetachCompletedHandler ();
 613                 clock->Stop ();
 614                 clock->Dispose ();
 615         }
 616 }
 617
 618 BeginStoryboard::BeginStoryboard ()
 619 {
 620         SetObjectType (Type::BEGINSTORYBOARD);
 621 }
 622
 623 BeginStoryboard::~BeginStoryboard ()
 624 {
 625 }
 626
 627 void
 628 BeginStoryboard::Fire ()
 629 {
 630         Storyboard *sb = GetStoryboard ();
 631         if (sb) {
 632                 // FIXME I'd imagine we should be bubbling this error/exception upward, no?
 633                 sb->BeginWithError (NULL);
 634         }
 635 }
 636
 637
 638 DoubleAnimation::DoubleAnimation ()
 639 {
 640         SetObjectType (Type::DOUBLEANIMATION);
 641
 642         doubleToCached = NULL;
 643         doubleFromCached = NULL;
 644         doubleByCached = NULL;
 645         hasCached = FALSE;
 646 }
 647
 648 void DoubleAnimation::EnsureCache (void)
 649 {
 650         doubleFromCached = GetFrom ();
 651         doubleToCached = GetTo ();
 652         doubleByCached = GetBy ();
 653         hasCached = TRUE;
 654 }
 655
 656 Value*
 657 DoubleAnimation::GetTargetValue (Value *defaultOriginValue)
 658 {
 659         if (! hasCached)
 660                 this->EnsureCache ();
 661
 662         double start;
 663
 664         if (doubleFromCached)
 665                 start = *doubleFromCached;
 666         else if (defaultOriginValue->Is(Type::DOUBLE))
 667                 start = defaultOriginValue->AsDouble();
 668         else
 669                 start = 0.0;
 670
 671         if (doubleToCached)
 672                 return new Value (*doubleToCached);
 673         else if (doubleByCached)
 674                 return new Value (start + *doubleByCached);
 675         else
 676                 return new Value (start);
 677 }
 678
 679 Value*
 680 DoubleAnimation::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
 681                                   AnimationClock* animationClock)
 682 {
 683         if (! hasCached)
 684                 this->EnsureCache ();
 685
 686         double start;
 687
 688         if (doubleFromCached)
 689                 start = *doubleFromCached;
 690         else if (defaultOriginValue->Is(Type::DOUBLE))
 691                 start = defaultOriginValue->AsDouble();
 692         else
 693                 start = 0.0;
 694
 695         double end;
 696
 697         if (doubleToCached) {
 698                 end = *doubleToCached;
 699         }
 700         else if (doubleByCached) {
 701                 end = start + *doubleByCached;
 702         }
 703         else if (defaultDestinationValue->Is(Type::DOUBLE)) {
 704                 end = defaultDestinationValue->AsDouble();
 705         }
 706         else
 707                 end = start;
 708
 709         double progress = animationClock->GetCurrentProgress ();
 710
 711         if (GetEasingFunction ())
 712                 progress = GetEasingFunction()->Ease (progress);
 713
 714         return new Value (LERP (start, end, progress));
 715 }
 716
 717 void
 718 DoubleAnimation::OnPropertyChanged (PropertyChangedEventArgs *args, MoonError *error)
 719 {
 720         if (args->GetProperty ()->GetOwnerType() != Type::DOUBLEANIMATION) {
 721                 DependencyObject::OnPropertyChanged (args, error);
 722                 return;
 723         }
 724
 725         // Get rid of the cache
 726         hasCached = FALSE;
 727         doubleToCached = NULL;
 728         doubleFromCached = NULL;
 729         doubleByCached = NULL;
 730
 731         NotifyListenersOfPropertyChange (args, error);
 732 }
 733
 734 ColorAnimation::ColorAnimation ()
 735 {
 736         SetObjectType (Type::COLORANIMATION);
 737
 738         colorToCached = NULL;
 739         colorFromCached = NULL;
 740         colorByCached = NULL;
 741         hasCached = FALSE;
 742 }
 743
 744 void ColorAnimation::EnsureCache (void)
 745 {
 746         colorFromCached = GetFrom ();
 747         colorToCached = GetTo ();
 748         colorByCached = GetBy ();
 749         hasCached = TRUE;
 750 }
 751
 752 Value*
 753 ColorAnimation::GetTargetValue (Value *defaultOriginValue)
 754 {
 755         if (! hasCached)
 756                 this->EnsureCache ();
 757
 758         Color start;
 759
 760         if (colorFromCached)
 761                 start = *colorFromCached;
 762         else if (defaultOriginValue->Is(Type::COLOR))
 763                 start = *defaultOriginValue->AsColor();
 764
 765         if (colorToCached)
 766                 return new Value (*colorToCached);
 767         else if (colorByCached)
 768                 return new Value (start + *colorByCached);
 769         else
 770                 return new Value (start);
 771 }
 772
 773 Value*
 774 ColorAnimation::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
 775                                  AnimationClock* animationClock)
 776 {
 777         if (! hasCached)
 778                 this->EnsureCache ();
 779
 780         Color start;
 781
 782         if (colorFromCached)
 783                 start = *colorFromCached;
 784         else if (defaultOriginValue->Is(Type::COLOR))
 785                 start = *defaultOriginValue->AsColor();
 786
 787         Color end;
 788
 789         if (colorToCached) {
 790                 end = *colorToCached;
 791         }
 792         else if (colorByCached) {
 793                 end = start + *colorByCached;
 794         }
 795         else if (defaultDestinationValue->Is(Type::COLOR)) {
 796                 end = *defaultDestinationValue->AsColor();
 797         }
 798         else {
 799                 end = start;
 800         }
 801
 802         double progress = animationClock->GetCurrentProgress ();
 803
 804         if (GetEasingFunction ())
 805                 progress = GetEasingFunction()->Ease (progress);
 806
 807         return new Value (LERP (start, end, progress));
 808 }
 809
 810 void
 811 ColorAnimation::OnPropertyChanged (PropertyChangedEventArgs *args, MoonError *error)
 812 {
 813         if (args->GetProperty ()->GetOwnerType() != Type::COLORANIMATION) {
 814                 DependencyObject::OnPropertyChanged (args, error);
 815                 return;
 816         }
 817
 818         // Get rid of the cache
 819         colorToCached = NULL;
 820         colorFromCached = NULL;
 821         colorByCached = NULL;
 822         hasCached = FALSE;
 823
 824         NotifyListenersOfPropertyChange (args, error);
 825 }
 826
 827 PointAnimation::PointAnimation ()
 828 {
 829         SetObjectType (Type::POINTANIMATION);
 830
 831         pointToCached = NULL;
 832         pointFromCached = NULL;
 833         pointByCached = NULL;
 834         hasCached = FALSE;
 835 }
 836
 837 PointAnimation::~PointAnimation ()
 838 {
 839 }
 840
 841 void PointAnimation::EnsureCache (void)
 842 {
 843         pointFromCached = GetFrom ();
 844         pointToCached = GetTo ();
 845         pointByCached = GetBy ();
 846         hasCached = TRUE;
 847 }
 848
 849 Value*
 850 PointAnimation::GetTargetValue (Value *defaultOriginValue)
 851 {
 852         if (! hasCached)
 853                 this->EnsureCache ();
 854
 855         Point start;
 856
 857         if (pointFromCached)
 858                 start = *pointFromCached;
 859         else if (defaultOriginValue->Is(Type::POINT))
 860                 start = *defaultOriginValue->AsPoint();
 861
 862         if (pointToCached)
 863                 return new Value (*pointToCached);
 864         else if (pointByCached)
 865                 return new Value (start + *pointByCached);
 866         else
 867                 return new Value (start);
 868 }
 869
 870 Value*
 871 PointAnimation::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
 872                                  AnimationClock* animationClock)
 873 {
 874         if (! hasCached)
 875                 this->EnsureCache ();
 876
 877         Point start;
 878
 879         if (pointFromCached)
 880                 start = *pointFromCached;
 881         else if (defaultOriginValue->Is(Type::POINT))
 882                 start = *defaultOriginValue->AsPoint();
 883
 884         Point end;
 885
 886         if (pointToCached) {
 887                 end = *pointToCached;
 888         }
 889         else if (pointByCached) {
 890                 end = start + *pointByCached;
 891         }
 892         else if (defaultDestinationValue->Is(Type::POINT)) {
 893                 end = *defaultDestinationValue->AsPoint();
 894         }
 895         else {
 896                 end = start;
 897         }
 898
 899         double progress = animationClock->GetCurrentProgress ();
 900
 901         if (GetEasingFunction ())
 902                 progress = GetEasingFunction()->Ease (progress);
 903
 904         return new Value (LERP (start, end, progress));
 905 }
 906
 907 void
 908 PointAnimation::OnPropertyChanged (PropertyChangedEventArgs *args, MoonError *error)
 909 {
 910         if (args->GetProperty ()->GetOwnerType() != Type::POINTANIMATION) {
 911                 DependencyObject::OnPropertyChanged (args, error);
 912                 return;
 913         }
 914
 915         // Get rid of the cache
 916         pointToCached = NULL;
 917         pointFromCached = NULL;
 918         pointByCached = NULL;
 919         hasCached = FALSE;
 920
 921         NotifyListenersOfPropertyChange (args, error);
 922 }
 923
 924 KeySpline::KeySpline ()
 925 {
 926         SetObjectType (Type::KEYSPLINE);
 927
 928         quadraticsArray = NULL;
 929 }
 930
 931 KeySpline::KeySpline (Point controlPoint1, Point controlPoint2)
 932 {
 933         SetObjectType (Type::KEYSPLINE);
 934
 935         quadraticsArray = NULL;
 936         SetControlPoint1 (&controlPoint1);
 937         SetControlPoint2 (&controlPoint2);
 938 }
 939
 940 KeySpline::KeySpline (double x1, double y1,
 941                       double x2, double y2)
 942 {
 943         SetObjectType (Type::KEYSPLINE);
 944
 945         quadraticsArray = NULL;
 946
 947         Point p1 = Point (x1, y1);
 948         Point p2 = Point (x2, y2);
 949
 950         SetControlPoint1 (&p1);
 951         SetControlPoint2 (&p2);
 952 }
 953
 954 KeySpline::~KeySpline ()
 955 {
 956         g_free (quadraticsArray);
 957         quadraticsArray = NULL;
 958 }
 959
 960
 961 void
 962 KeySpline::RegenerateQuadratics ()
 963 {
 964         quadraticsArray = (moon_quadratic *) g_malloc (sizeof (moon_quadratic) * KEYSPLINE_TOTAL_COUNT);
 965
 966         Point c1 = *GetControlPoint1 ();
 967         Point c2 = *GetControlPoint2 ();
 968
 969         moon_cubic src;
 970         src.c0.x = 0; src.c0.y = 0;
 971         src.c1.x = c1.x; src.c1.y = c1.y;
 972         src.c2.x = c2.x; src.c2.y = c2.y;
 973         src.c3.x  = 1.0; src.c3.y = 1.0;
 974
 975         moon_cubic carr [KEYSPLINE_TOTAL_COUNT];
 976
 977         moon_subdivide_cubic_at_level (carr, KEYSPLINE_PRECISION_LEVEL, &src);
 978         moon_convert_cubics_to_quadratics (quadraticsArray, carr, KEYSPLINE_TOTAL_COUNT);
 979 }
 980
 981 void
 982 KeySpline::OnPropertyChanged (PropertyChangedEventArgs *args, MoonError *error)
 983 {
 984         if (args->GetProperty ()->GetOwnerType() != Type::KEYSPLINE) {
 985                 DependencyObject::OnPropertyChanged (args, error);
 986                 return;
 987         }
 988
 989         g_free (quadraticsArray);
 990         quadraticsArray = NULL;
 991
 992         NotifyListenersOfPropertyChange (args, error);
 993 }
 994
 995 double
 996 KeySpline::GetSplineProgress (double linearProgress)
 997 {
 998         if (linearProgress >= 1.0)
 999                 return 1.0;
1000
1001         if (linearProgress <= 0.0)
1002                 return 0.0;
1003
1004         if (quadraticsArray == NULL)
1005                 RegenerateQuadratics ();
1006
1007         return moon_quadratic_array_y_for_x (quadraticsArray, linearProgress, KEYSPLINE_TOTAL_COUNT);
1008 }
1009
1010 KeyFrame::KeyFrame ()
1011 {
1012         SetObjectType (Type::KEYFRAME);
1013 }
1014
1015 KeyFrame::~KeyFrame ()
1016 {
1017 }
1018
1019 Value *
1020 KeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1021 {
1022         g_warning ("KeyFrame::InterpolateValue has been called. The derived class %s should have overridden it.",
1023                    GetName ());
1024         return NULL;
1025 }
1026
1027 static int
1028 KeyFrameComparer (gconstpointer kf1, gconstpointer kf2)
1029 {
1030         // Assumes timespan keytimes only
1031         TimeSpan ts1 = (*(KeyFrame **) kf1)->resolved_keytime;
1032         TimeSpan ts2 = (*(KeyFrame **) kf2)->resolved_keytime;
1033         TimeSpan tsdiff = ts1 - ts2;
1034
1035         if (tsdiff == 0)
1036                 return 0;
1037         else if (tsdiff < 0)
1038                 return -1;
1039         else
1040                 return 1;
1041 }
1042
1043 KeyFrameCollection::KeyFrameCollection ()
1044 {
1045         SetObjectType (Type::KEYFRAME_COLLECTION);
1046
1047         sorted_list = g_ptr_array_new ();
1048         resolved = false;
1049 }
1050
1051 KeyFrameCollection::~KeyFrameCollection ()
1052 {
1053         g_ptr_array_free (sorted_list, true);
1054 }
1055
1056 bool
1057 KeyFrameCollection::AddedToCollection (Value *value, MoonError *error)
1058 {
1059         if (!DependencyObjectCollection::AddedToCollection (value, error))
1060                 return false;
1061
1062         resolved = false;
1063
1064         return true;
1065 }
1066
1067 void
1068 KeyFrameCollection::RemovedFromCollection (Value *value)
1069 {
1070         DependencyObjectCollection::RemovedFromCollection (value);
1071
1072         resolved = false;
1073 }
1074
1075 bool
1076 KeyFrameCollection::Clear ()
1077 {
1078         resolved = false;
1079         g_ptr_array_set_size (sorted_list, 0);
1080         return DependencyObjectCollection::Clear ();
1081 }
1082
1083 KeyFrame *
1084 KeyFrameCollection::GetKeyFrameForTime (TimeSpan t, KeyFrame **prev_frame)
1085 {
1086         KeyFrame *current_keyframe = NULL;
1087         KeyFrame *previous_keyframe = NULL;
1088         int i;
1089
1090         if (sorted_list->len == 0) {
1091                 if (prev_frame)
1092                         *prev_frame = NULL;
1093
1094                 return NULL;
1095         }
1096
1097         /* Crawl forward to figure out what segment to use (this assumes the list is sorted) */
1098         for (i = 0; i < (int) sorted_list->len; i++) {
1099                 KeyFrame *keyframe = (KeyFrame *) sorted_list->pdata[i];
1100                 TimeSpan key_end_time = keyframe->resolved_keytime;
1101
1102                 if (key_end_time >= t || (i + 1) >= (int) sorted_list->len)
1103                         break;
1104         }
1105
1106         /* Crawl backward to find first non-null frame */
1107         for (; i >= 0; i--) {
1108                 KeyFrame *keyframe = (KeyFrame *) sorted_list->pdata[i];
1109                 DependencyProperty *value_prop = keyframe->GetDependencyProperty ("Value");
1110                 if (keyframe->GetValue (value_prop) != NULL) {
1111                         current_keyframe = keyframe;
1112                         break;
1113                 }
1114         }
1115
1116         /* Crawl backward some more to find first non-null prev frame */
1117         for (i--; i >= 0; i--) {
1118                 KeyFrame *keyframe = (KeyFrame *) sorted_list->pdata[i];
1119                 DependencyProperty *value_prop = keyframe->GetDependencyProperty ("Value");
1120                 if (keyframe->GetValue (value_prop) != NULL) {
1121                         previous_keyframe = keyframe;
1122                         break;
1123                 }
1124         }
1125
1126         /* Assign prev frame */
1127         if (prev_frame != NULL)
1128                 *prev_frame = previous_keyframe;
1129
1130         return current_keyframe;
1131 }
1132
1133 void
1134 KeyFrameCollection::OnSubPropertyChanged (DependencyProperty *prop, DependencyObject *obj, PropertyChangedEventArgs *subobj_args)
1135 {
1136         if (strcmp (subobj_args->GetProperty ()->GetName (), "KeyTime") == 0) {
1137                 resolved = false;
1138         }
1139
1140         Collection::OnSubPropertyChanged (prop, obj, subobj_args);
1141 }
1142
1143 ColorKeyFrameCollection::ColorKeyFrameCollection ()
1144 {
1145         SetObjectType (Type::COLORKEYFRAME_COLLECTION);
1146 }
1147
1148 ColorKeyFrameCollection::~ColorKeyFrameCollection ()
1149 {
1150 }
1151
1152 DoubleKeyFrameCollection::DoubleKeyFrameCollection ()
1153 {
1154         SetObjectType (Type::DOUBLEKEYFRAME_COLLECTION);
1155 }
1156
1157 DoubleKeyFrameCollection::~DoubleKeyFrameCollection ()
1158 {
1159 }
1160
1161 PointKeyFrameCollection::PointKeyFrameCollection ()
1162 {
1163         SetObjectType (Type::POINTKEYFRAME_COLLECTION);
1164 }
1165
1166 PointKeyFrameCollection::~PointKeyFrameCollection ()
1167 {
1168 }
1169
1170 DoubleKeyFrame::DoubleKeyFrame ()
1171 {
1172         SetObjectType (Type::DOUBLEKEYFRAME);
1173         SetValue (0.0);
1174 }
1175
1176 DoubleKeyFrame::~DoubleKeyFrame ()
1177 {
1178 }
1179
1180 ColorKeyFrame::ColorKeyFrame ()
1181 {
1182         SetObjectType (Type::COLORKEYFRAME);
1183         static Color c = Color (0, 0, 0, 1);
1184         SetValue (c);
1185 }
1186
1187 ColorKeyFrame::~ColorKeyFrame ()
1188 {
1189 }
1190
1191 PointKeyFrame::PointKeyFrame ()
1192 {
1193         SetObjectType (Type::POINTKEYFRAME);
1194         SetValue (Point (0,0));
1195 }
1196
1197 PointKeyFrame::~PointKeyFrame ()
1198 {
1199 }
1200
1201 DiscreteDoubleKeyFrame::DiscreteDoubleKeyFrame ()
1202 {
1203         SetObjectType(Type::DISCRETEDOUBLEKEYFRAME);
1204 }
1205
1206 DiscreteDoubleKeyFrame::~DiscreteDoubleKeyFrame ()
1207 {
1208 }
1209
1210 Value*
1211 DiscreteDoubleKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1212 {
1213         double *to = GetValue();
1214
1215         if (to && keyFrameProgress == 1.0)
1216                 return new Value(*to);
1217         else
1218                 return new Value (baseValue->AsDouble());
1219 }
1220
1221 DiscreteColorKeyFrame::DiscreteColorKeyFrame ()
1222 {
1223         SetObjectType(Type::DISCRETECOLORKEYFRAME);
1224 }
1225
1226 DiscreteColorKeyFrame::~DiscreteColorKeyFrame ()
1227 {
1228 }
1229
1230 Value*
1231 DiscreteColorKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1232 {
1233         Color *to = GetValue();
1234
1235         if (to && keyFrameProgress == 1.0)
1236                 return new Value(*to);
1237         else
1238                 return new Value (*baseValue->AsColor());
1239 }
1240
1241 DiscretePointKeyFrame::DiscretePointKeyFrame ()
1242 {
1243         SetObjectType(Type::DISCRETEPOINTKEYFRAME);
1244 }
1245
1246 DiscretePointKeyFrame::~DiscretePointKeyFrame ()
1247 {
1248 }
1249
1250 Value*
1251 DiscretePointKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1252 {
1253         Point *to = GetValue();
1254
1255         if (to && keyFrameProgress == 1.0)
1256                 return new Value(*to);
1257         else
1258                 return new Value (*baseValue->AsPoint());
1259 }
1260
1261
1262 LinearDoubleKeyFrame::LinearDoubleKeyFrame ()
1263 {
1264         SetObjectType(Type::LINEARDOUBLEKEYFRAME);
1265 }
1266
1267 LinearDoubleKeyFrame::~LinearDoubleKeyFrame ()
1268 {
1269 }
1270
1271 Value*
1272 LinearDoubleKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1273 {
1274         double *to = GetValue();
1275
1276         if (!to)
1277                 return new Value (baseValue->AsDouble());
1278
1279         double start, end;
1280
1281         start = baseValue->AsDouble();
1282         end = *to;
1283
1284         return new Value (LERP (start, end, keyFrameProgress));
1285 }
1286
1287 LinearColorKeyFrame::LinearColorKeyFrame ()
1288 {
1289         SetObjectType(Type::LINEARCOLORKEYFRAME);
1290 }
1291
1292 LinearColorKeyFrame::~LinearColorKeyFrame ()
1293 {
1294 }
1295
1296 Value*
1297 LinearColorKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1298 {
1299         Color *to = GetValue();
1300
1301         if (!to)
1302                 return new Value (*baseValue->AsColor());
1303
1304         Color start, end;
1305
1306         start = *baseValue->AsColor();
1307         end = *to;
1308
1309         return new Value (LERP (start, end, keyFrameProgress));
1310 }
1311
1312 LinearPointKeyFrame::LinearPointKeyFrame ()
1313 {
1314         SetObjectType(Type::LINEARPOINTKEYFRAME);
1315 }
1316
1317 LinearPointKeyFrame::~LinearPointKeyFrame ()
1318 {
1319 }
1320
1321 Value*
1322 LinearPointKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1323 {
1324         Point *to = GetValue();
1325
1326         if (!to)
1327                 return new Value (*baseValue->AsPoint());
1328
1329         Point start, end;
1330
1331         start = *baseValue->AsPoint();
1332         end = *to;
1333
1334         return new Value (LERP (start, end, keyFrameProgress));
1335 }
1336
1337 SplineDoubleKeyFrame::SplineDoubleKeyFrame ()
1338 {
1339         SetObjectType (Type::SPLINEDOUBLEKEYFRAME);
1340 }
1341
1342 SplineDoubleKeyFrame::~SplineDoubleKeyFrame ()
1343 {
1344 }
1345
1346 Value *
1347 SplineDoubleKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1348 {
1349         double splineProgress = GetKeySpline ()->GetSplineProgress (keyFrameProgress);
1350
1351         double *to = GetValue();
1352
1353         if (!to)
1354                 return new Value (baseValue->AsDouble());
1355         else if (keyFrameProgress >= 1.0)
1356                 return new Value (*to);
1357
1358         double start, end;
1359
1360         start = baseValue->AsDouble();
1361         end = *to;
1362
1363         return new Value (LERP (start, end, splineProgress));
1364 }
1365
1366
1367 SplineColorKeyFrame::SplineColorKeyFrame ()
1368 {
1369         SetObjectType (Type::SPLINECOLORKEYFRAME);
1370 }
1371
1372 SplineColorKeyFrame::~SplineColorKeyFrame ()
1373 {
1374 }
1375
1376 Value *
1377 SplineColorKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1378 {
1379         double splineProgress = GetKeySpline ()->GetSplineProgress (keyFrameProgress);
1380
1381         Color *to = GetValue();
1382
1383         if (!to)
1384                 return new Value (*baseValue->AsColor());
1385         else if (keyFrameProgress >= 1.0)
1386                 return new Value (*to);
1387
1388         Color start, end;
1389
1390         start = *baseValue->AsColor();
1391         end = *to;
1392
1393         return new Value (LERP (start, end, splineProgress));
1394 }
1395
1396
1397 SplinePointKeyFrame::SplinePointKeyFrame ()
1398 {
1399         SetObjectType (Type::SPLINEPOINTKEYFRAME);
1400 }
1401
1402 SplinePointKeyFrame::~SplinePointKeyFrame ()
1403 {
1404 }
1405
1406 Value *
1407 SplinePointKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1408 {
1409         double splineProgress = GetKeySpline ()->GetSplineProgress (keyFrameProgress);
1410
1411         Point *to = GetValue();
1412
1413         if (!to)
1414                 return new Value (*baseValue->AsPoint());
1415         else if (keyFrameProgress >= 1.0)
1416                 return new Value (*to);
1417
1418         Point start, end;
1419
1420         start = *baseValue->AsPoint();
1421         end = *to;
1422
1423         return new Value (LERP (start, end, splineProgress));
1424 }
1425
1426 EasingColorKeyFrame::EasingColorKeyFrame ()
1427 {
1428         SetObjectType (Type::EASINGCOLORKEYFRAME);
1429 }
1430
1431 EasingColorKeyFrame::~EasingColorKeyFrame ()
1432 {
1433 }
1434
1435 Value *
1436 EasingColorKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1437 {
1438         Color *to = GetValue();
1439
1440         if (!to)
1441                 return new Value (*baseValue->AsColor());
1442         else if (keyFrameProgress >= 1.0)
1443                 return new Value (*to);
1444
1445         Color start, end;
1446
1447         start = *baseValue->AsColor();
1448         end = *to;
1449
1450         if (GetEasingFunction ())
1451                 GetEasingFunction ()->Ease (keyFrameProgress);
1452
1453         return new Value (LERP (start, end, keyFrameProgress));
1454 }
1455
1456 EasingDoubleKeyFrame::EasingDoubleKeyFrame ()
1457 {
1458         SetObjectType (Type::EASINGDOUBLEKEYFRAME);
1459 }
1460
1461 EasingDoubleKeyFrame::~EasingDoubleKeyFrame ()
1462 {
1463 }
1464
1465 Value *
1466 EasingDoubleKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1467 {
1468         double *to = GetValue();
1469
1470         if (!to)
1471                 return new Value (baseValue->AsDouble());
1472         else if (keyFrameProgress >= 1.0)
1473                 return new Value (*to);
1474
1475         double start, end;
1476
1477         start = baseValue->AsDouble();
1478         end = *to;
1479
1480         if (GetEasingFunction ())
1481                 GetEasingFunction ()->Ease (keyFrameProgress);
1482
1483         return new Value (LERP (start, end, keyFrameProgress));
1484 }
1485
1486
1487 EasingPointKeyFrame::EasingPointKeyFrame ()
1488 {
1489         SetObjectType (Type::EASINGPOINTKEYFRAME);
1490 }
1491
1492 EasingPointKeyFrame::~EasingPointKeyFrame ()
1493 {
1494 }
1495
1496 Value *
1497 EasingPointKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
1498 {
1499         Point *to = GetValue();
1500
1501         if (!to)
1502                 return new Value (*baseValue->AsPoint());
1503         else if (keyFrameProgress >= 1.0)
1504                 return new Value (*to);
1505
1506         Point start, end;
1507
1508         start = *baseValue->AsPoint();
1509         end = *to;
1510
1511         if (GetEasingFunction ())
1512                 GetEasingFunction ()->Ease (keyFrameProgress);
1513
1514         return new Value (LERP (start, end, keyFrameProgress));
1515 }
1516
1517 /* implements the algorithm specified at the bottom of this page:
1518    http://msdn2.microsoft.com/en-us/library/ms742524.aspx
1519 */
1520 static void
1521 KeyFrameAnimation_ResolveKeyFrames (Animation *animation, KeyFrameCollection *col)
1522 {
1523         if (col->resolved)
1524                 return;
1525
1526         col->resolved = true;
1527
1528         TimeSpan total_interpolation_time;
1529         bool has_timespan_keyframe = false;
1530         TimeSpan highest_keytime_timespan = 0;
1531         KeyFrame *keyframe;
1532         Value *value;
1533         int i;
1534
1535         for (i = 0; i < col->GetCount (); i++) {
1536                 value = col->GetValueAt (i);
1537                 keyframe = value->AsKeyFrame ();
1538                 keyframe->resolved_keytime = 0;
1539                 keyframe->resolved = false;
1540         }
1541
1542         /* resolve TimeSpan keyframes (step 1 from url) */
1543         for (i = 0; i < col->GetCount (); i++) {
1544                 value = col->GetValueAt (i);
1545                 keyframe = value->AsKeyFrame ();
1546
1547                 if (keyframe->GetKeyTime()->HasTimeSpan()) {
1548                         has_timespan_keyframe = true;
1549                         TimeSpan ts = keyframe->GetKeyTime()->GetTimeSpan ();
1550                         if (ts > highest_keytime_timespan)
1551                                 highest_keytime_timespan = ts;
1552
1553                         keyframe->resolved_keytime = ts;
1554                         keyframe->resolved = true;
1555                 }
1556         }
1557
1558         /* calculate total animation interpolation time (step 2 from url) */
1559         Duration *d = animation->GetDuration();
1560         if (d->HasTimeSpan ()) {
1561                 total_interpolation_time = d->GetTimeSpan ();
1562         }
1563         else if (has_timespan_keyframe) {
1564                 total_interpolation_time = highest_keytime_timespan;
1565         }
1566         else {
1567                 total_interpolation_time = TimeSpan_FromSeconds (1);
1568         }
1569
1570         /* use the total interpolation time to resolve percent keytime keyframes (step 3 from url) */
1571         for (i = 0; i < col->GetCount (); i++) {
1572                 value = col->GetValueAt (i);
1573                 keyframe = value->AsKeyFrame ();
1574
1575                 if (keyframe->GetKeyTime()->HasPercent()) {
1576                         keyframe->resolved_keytime = (TimeSpan)(total_interpolation_time * keyframe->GetKeyTime()->GetPercent ());
1577                         keyframe->resolved = true;
1578                 }
1579         }
1580
1581         /* step 4 from url */
1582         KeyTime *kt;
1583
1584         /* if the last frame is KeyTime Uniform or Paced, resolve it
1585            to be equal to the total interpolation time */
1586         if (col->GetCount () > 0) {
1587                 value = col->GetValueAt (col->GetCount () - 1);
1588                 keyframe = value->AsKeyFrame ();
1589
1590                 kt = keyframe->GetKeyTime ();
1591                 if (*kt == KeyTime::Paced || *kt == KeyTime::Uniform) {
1592                         keyframe->resolved_keytime = total_interpolation_time;
1593                         keyframe->resolved = true;
1594                 }
1595         }
1596
1597         /* if the first frame is KeyTime::Paced:
1598         **   1. if there is only 1 frame, its KeyTime is the total interpolation time.
1599         **   2. if there is more than 1 frame, its KeyTime is 0.
1600         **
1601         ** note 1 is handled in the above block so we only have to
1602         ** handle 2 here.
1603         */
1604         if (col->GetCount () > 0) {
1605                 value = col->GetValueAt (0);
1606                 keyframe = value->AsKeyFrame ();
1607                 kt = keyframe->GetKeyTime ();
1608
1609                 if (!keyframe->resolved && *kt == KeyTime::Paced) {
1610                         keyframe->resolved_keytime = 0;
1611                         keyframe->resolved = true;
1612                 }
1613         }
1614
1615         /* XXX resolve remaining KeyTime::Uniform frames (step 5 from url) */
1616
1617         /* XXX resolve frames with unspecified keytimes (step 6 from url)
1618
1619            -- is this possible?  is the default keytime NULL?  it
1620               seems to be Uniform? */
1621
1622         /* XXX resolve remaining KeyTime::Paced frames (step 7 from url) */
1623
1624         /* insert the nodes into the sorted list using a stable sort
1625            with resolved keytime as primary key, declaration order as
1626            secondary key (step 8 from url) */
1627         g_ptr_array_set_size (col->sorted_list, 0);
1628
1629         for (i = col->GetCount (); i > 0; i--) {
1630                 value = col->GetValueAt (i - 1);
1631                 keyframe = value->AsKeyFrame ();
1632
1633                 if (!keyframe->resolved)
1634                         g_warning ("***** unresolved keyframe!");
1635
1636                 g_ptr_array_insert_sorted (col->sorted_list, KeyFrameComparer, keyframe);
1637         }
1638 }
1639
1640 // Generic validator of KeyFrameCollection's. Collection vallidates
1641 // if all keyframes have valid time.
1642 static bool
1643 generic_keyframe_validator (KeyFrameCollection *col)
1644 {
1645         KeyFrame *keyframe;
1646         Value *value;
1647
1648         for (int i = 0; i < col->GetCount (); i++) {
1649                 value = col->GetValueAt (i);
1650                 keyframe = value->AsKeyFrame ();
1651                 if (keyframe->GetKeyTime () == NULL)
1652                         return false;
1653         }
1654
1655         return true;
1656 }
1657
1658
1659 DoubleAnimationUsingKeyFrames::DoubleAnimationUsingKeyFrames ()
1660 {
1661         SetObjectType (Type::DOUBLEANIMATIONUSINGKEYFRAMES);
1662 }
1663
1664 DoubleAnimationUsingKeyFrames::~DoubleAnimationUsingKeyFrames ()
1665 {
1666 }
1667
1668 void
1669 DoubleAnimationUsingKeyFrames::AddKeyFrame (DoubleKeyFrame *frame)
1670 {
1671         DoubleKeyFrameCollection *key_frames = GetKeyFrames ();
1672
1673         key_frames->Add (frame);
1674 }
1675
1676 void
1677 DoubleAnimationUsingKeyFrames::RemoveKeyFrame (DoubleKeyFrame *frame)
1678 {
1679         DoubleKeyFrameCollection *key_frames = GetKeyFrames ();
1680
1681         key_frames->Remove (frame);
1682 }
1683
1684 Value*
1685 DoubleAnimationUsingKeyFrames::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
1686                                                 AnimationClock* animationClock)
1687 {
1688         DoubleKeyFrameCollection *key_frames = GetKeyFrames ();
1689
1690         /* current segment info */
1691         TimeSpan current_time = animationClock->GetCurrentTime();
1692         DoubleKeyFrame *current_keyframe;
1693         DoubleKeyFrame *previous_keyframe;
1694         DoubleKeyFrame** keyframep = &previous_keyframe;
1695         Value *baseValue;
1696         bool deleteBaseValue;
1697
1698         current_keyframe = (DoubleKeyFrame*)key_frames->GetKeyFrameForTime (current_time, (KeyFrame**)keyframep);
1699         if (current_keyframe == NULL) {
1700           //abort ();
1701                 return NULL; /* XXX */
1702         }
1703
1704         TimeSpan key_end_time = current_keyframe->resolved_keytime;
1705         TimeSpan key_start_time;
1706
1707         if (previous_keyframe == NULL) {
1708                 /* the first keyframe, start at the animation's base value */
1709                 baseValue = defaultOriginValue;
1710                 deleteBaseValue = false;
1711                 key_start_time = 0;
1712         }
1713         else {
1714                 /* start at the previous keyframe's target value */
1715                 baseValue = new Value (*previous_keyframe->GetValue ());
1716                 deleteBaseValue = true;
1717                 key_start_time = previous_keyframe->resolved_keytime;
1718         }
1719
1720         double progress;
1721
1722         if (current_time >= key_end_time) {
1723                 progress = 1.0;
1724         }
1725         else {
1726                 TimeSpan key_duration = key_end_time - key_start_time;
1727                 if (key_duration == 0)
1728                         progress = 1.0;
1729                 else
1730                         progress = (double)(current_time - key_start_time) / key_duration;
1731         }
1732
1733         /* get the current value out of that segment */
1734         Value *rv = current_keyframe->InterpolateValue (baseValue, progress);
1735         if (deleteBaseValue)
1736                 delete baseValue;
1737         return rv;
1738 }
1739
1740 Duration
1741 DoubleAnimationUsingKeyFrames::GetNaturalDurationCore (Clock *clock)
1742 {
1743         DoubleKeyFrameCollection *key_frames = GetKeyFrames ();
1744
1745         KeyFrameAnimation_ResolveKeyFrames (this, key_frames);
1746
1747         guint len = key_frames->sorted_list->len;
1748         if (len > 0)
1749                 return ((KeyFrame *) key_frames->sorted_list->pdata[len - 1])->resolved_keytime;
1750         else
1751                 return Duration (0);
1752 }
1753
1754 bool
1755 DoubleAnimationUsingKeyFrames::Resolve (DependencyObject *target, DependencyProperty *property)
1756 {
1757         KeyFrameAnimation_ResolveKeyFrames (this, GetKeyFrames ());
1758         return true;
1759 }
1760
1761 bool
1762 DoubleAnimationUsingKeyFrames::Validate ()
1763 {
1764         return generic_keyframe_validator (GetKeyFrames ());
1765 }
1766
1767 ColorAnimationUsingKeyFrames::ColorAnimationUsingKeyFrames()
1768 {
1769         SetObjectType (Type::COLORANIMATIONUSINGKEYFRAMES);
1770 }
1771
1772 ColorAnimationUsingKeyFrames::~ColorAnimationUsingKeyFrames ()
1773 {
1774 }
1775
1776 void
1777 ColorAnimationUsingKeyFrames::AddKeyFrame (ColorKeyFrame *frame)
1778 {
1779         ColorKeyFrameCollection *key_frames = GetKeyFrames ();
1780
1781         key_frames->Add (frame);
1782 }
1783
1784 void
1785 ColorAnimationUsingKeyFrames::RemoveKeyFrame (ColorKeyFrame *frame)
1786 {
1787         ColorKeyFrameCollection *key_frames = GetKeyFrames ();
1788
1789         key_frames->Remove (frame);
1790 }
1791
1792 Value*
1793 ColorAnimationUsingKeyFrames::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
1794                                                AnimationClock* animationClock)
1795 {
1796         ColorKeyFrameCollection *key_frames = GetKeyFrames ();
1797         /* current segment info */
1798         TimeSpan current_time = animationClock->GetCurrentTime();
1799         ColorKeyFrame *current_keyframe;
1800         ColorKeyFrame *previous_keyframe;
1801         ColorKeyFrame** keyframep = &previous_keyframe;
1802         Value *baseValue;
1803         bool deleteBaseValue;
1804
1805         current_keyframe = (ColorKeyFrame*)key_frames->GetKeyFrameForTime (current_time, (KeyFrame**)keyframep);
1806         if (current_keyframe == NULL)
1807                 return NULL; /* XXX */
1808
1809         TimeSpan key_end_time = current_keyframe->resolved_keytime;
1810         TimeSpan key_start_time;
1811
1812         if (previous_keyframe == NULL) {
1813                 /* the first keyframe, start at the animation's base value */
1814                 baseValue = defaultOriginValue;
1815                 deleteBaseValue = false;
1816                 key_start_time = 0;
1817         }
1818         else {
1819                 /* start at the previous keyframe's target value */
1820                 baseValue = new Value(*previous_keyframe->GetValue ());
1821                 deleteBaseValue = true;
1822                 key_start_time = previous_keyframe->resolved_keytime;
1823         }
1824
1825         double progress;
1826
1827         if (current_time >= key_end_time) {
1828                 progress = 1.0;
1829         }
1830         else {
1831                 TimeSpan key_duration = key_end_time - key_start_time;
1832                 if (key_duration == 0)
1833                         progress = 1.0;
1834                 else
1835                         progress = (double)(current_time - key_start_time) / key_duration;
1836         }
1837
1838         /* get the current value out of that segment */
1839         Value *rv = current_keyframe->InterpolateValue (baseValue, progress);
1840         if (deleteBaseValue)
1841                 delete baseValue;
1842         return rv;;
1843 }
1844
1845 Duration
1846 ColorAnimationUsingKeyFrames::GetNaturalDurationCore (Clock *clock)
1847 {
1848         ColorKeyFrameCollection *key_frames = GetKeyFrames ();
1849
1850         KeyFrameAnimation_ResolveKeyFrames (this, key_frames);
1851
1852         guint len = key_frames->sorted_list->len;
1853         if (len > 0)
1854                 return ((KeyFrame *) key_frames->sorted_list->pdata[len - 1])->resolved_keytime;
1855         else
1856                 return Duration (0);
1857 }
1858
1859 bool
1860 ColorAnimationUsingKeyFrames::Resolve (DependencyObject *target, DependencyProperty *property)
1861 {
1862         KeyFrameAnimation_ResolveKeyFrames (this, GetKeyFrames ());
1863         return true;
1864 }
1865
1866 bool
1867 ColorAnimationUsingKeyFrames::Validate ()
1868 {
1869         return generic_keyframe_validator (GetKeyFrames ());
1870 }
1871
1872 PointAnimationUsingKeyFrames::PointAnimationUsingKeyFrames()
1873 {
1874         SetObjectType (Type::POINTANIMATIONUSINGKEYFRAMES);
1875 }
1876
1877 PointAnimationUsingKeyFrames::~PointAnimationUsingKeyFrames ()
1878 {
1879 }
1880
1881 void
1882 PointAnimationUsingKeyFrames::AddKeyFrame (PointKeyFrame *frame)
1883 {
1884         PointKeyFrameCollection *key_frames = GetKeyFrames ();
1885
1886         key_frames->Add (frame);
1887 }
1888
1889 void
1890 PointAnimationUsingKeyFrames::RemoveKeyFrame (PointKeyFrame *frame)
1891 {
1892         PointKeyFrameCollection *key_frames = GetKeyFrames ();
1893
1894         key_frames->Remove (frame);
1895 }
1896
1897 Value*
1898 PointAnimationUsingKeyFrames::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
1899                                                AnimationClock* animationClock)
1900 {
1901         PointKeyFrameCollection *key_frames = GetKeyFrames ();
1902         /* current segment info */
1903         TimeSpan current_time = animationClock->GetCurrentTime();
1904         PointKeyFrame *current_keyframe;
1905         PointKeyFrame *previous_keyframe;
1906         PointKeyFrame** keyframep = &previous_keyframe;
1907         Value *baseValue;
1908         bool deleteBaseValue;
1909
1910         current_keyframe = (PointKeyFrame*)key_frames->GetKeyFrameForTime (current_time, (KeyFrame**)keyframep);
1911         if (current_keyframe == NULL)
1912                 return NULL; /* XXX */
1913
1914         TimeSpan key_end_time = current_keyframe->resolved_keytime;
1915         TimeSpan key_start_time;
1916
1917         if (previous_keyframe == NULL) {
1918                 /* the first keyframe, start at the animation's base value */
1919                 baseValue = defaultOriginValue;
1920                 deleteBaseValue = false;
1921                 key_start_time = 0;
1922         }
1923         else {
1924                 /* start at the previous keyframe's target value */
1925                 baseValue = new Value(*previous_keyframe->GetValue ());
1926                 deleteBaseValue = true;
1927                 key_start_time = previous_keyframe->resolved_keytime;
1928         }
1929
1930         double progress;
1931
1932         if (current_time >= key_end_time) {
1933                 progress = 1.0;
1934         }
1935         else {
1936                 TimeSpan key_duration = key_end_time - key_start_time;
1937                 if (key_duration == 0)
1938                         progress = 1.0;
1939                 else
1940                         progress = (double)(current_time - key_start_time) / key_duration;
1941         }
1942
1943         /* get the current value out of that segment */
1944         Value *rv = current_keyframe->InterpolateValue (baseValue, progress);
1945         if (deleteBaseValue)
1946                 delete baseValue;
1947         return rv;
1948 }
1949
1950 Duration
1951 PointAnimationUsingKeyFrames::GetNaturalDurationCore (Clock* clock)
1952 {
1953         PointKeyFrameCollection *key_frames = GetKeyFrames ();
1954
1955         KeyFrameAnimation_ResolveKeyFrames (this, key_frames);
1956
1957         guint len = key_frames->sorted_list->len;
1958         if (len > 0)
1959                 return ((KeyFrame *) key_frames->sorted_list->pdata[len - 1])->resolved_keytime;
1960         else
1961                 return Duration (0);
1962 }
1963
1964 bool
1965 PointAnimationUsingKeyFrames::Resolve (DependencyObject *target, DependencyProperty *property)
1966 {
1967         KeyFrameAnimation_ResolveKeyFrames (this, GetKeyFrames ());
1968         return true;
1969 }
1970
1971 bool
1972 PointAnimationUsingKeyFrames::Validate ()
1973 {
1974         return generic_keyframe_validator (GetKeyFrames ());
1975 }
1976
1977 ObjectKeyFrameCollection::ObjectKeyFrameCollection ()
1978 {
1979         SetObjectType (Type::OBJECTKEYFRAME_COLLECTION);
1980 }
1981
1982 ObjectKeyFrameCollection::~ObjectKeyFrameCollection ()
1983 {
1984 }
1985
1986 ObjectKeyFrame::ObjectKeyFrame ()
1987 {
1988         SetObjectType (Type::OBJECTKEYFRAME);
1989 }
1990
1991 ObjectKeyFrame::~ObjectKeyFrame ()
1992 {
1993 }
1994
1995 Value *
1996 ObjectKeyFrame::GetValue ()
1997 {
1998         return DependencyObject::GetValue (ValueProperty);
1999 }
2000
2001 DiscreteObjectKeyFrame::DiscreteObjectKeyFrame ()
2002 {
2003         SetObjectType (Type::DISCRETEOBJECTKEYFRAME);
2004 }
2005
2006 DiscreteObjectKeyFrame::~DiscreteObjectKeyFrame ()
2007 {
2008 }
2009
2010 Value*
2011 DiscreteObjectKeyFrame::InterpolateValue (Value *baseValue, double keyFrameProgress)
2012 {
2013         Value *to = GetConvertedValue ();
2014
2015         if (to && keyFrameProgress == 1.0)
2016                 return new Value (*to);
2017         else
2018                 return new Value (*baseValue);
2019 }
2020
2021 ObjectAnimationUsingKeyFrames::ObjectAnimationUsingKeyFrames ()
2022 {
2023         SetObjectType (Type::OBJECTANIMATIONUSINGKEYFRAMES);
2024 }
2025
2026 ObjectAnimationUsingKeyFrames::~ObjectAnimationUsingKeyFrames ()
2027 {
2028 }
2029
2030 void
2031 ObjectAnimationUsingKeyFrames::AddKeyFrame (ObjectKeyFrame *frame)
2032 {
2033         ObjectKeyFrameCollection *key_frames = GetKeyFrames ();
2034
2035         key_frames->Add (frame);
2036 }
2037
2038 void
2039 ObjectAnimationUsingKeyFrames::RemoveKeyFrame (ObjectKeyFrame *frame)
2040 {
2041         ObjectKeyFrameCollection *key_frames = GetKeyFrames ();
2042
2043         key_frames->Remove (frame);
2044 }
2045
2046 bool
2047 ObjectAnimationUsingKeyFrames::Resolve (DependencyObject *target, DependencyProperty *property)
2048 {
2049         ObjectKeyFrameCollection *frames = (ObjectKeyFrameCollection *) GetKeyFrames ();
2050         for (int i = 0; i < frames->GetCount (); i++) {
2051                 ObjectKeyFrame *frame = frames->GetValueAt (i)->AsObjectKeyFrame ();
2052
2053                 Value *value = frame->GetValue ();
2054                 if (!value || value->GetIsNull ()) {
2055                         // If the value is null, don't convert
2056                         frame->SetValue (ObjectKeyFrame::ConvertedValueProperty, NULL);
2057                 } else if (value->GetKind () == property->GetPropertyType ()) {
2058                         // If the value is of the correct type already, don't convert
2059                         frame->SetValue (ObjectKeyFrame::ConvertedValueProperty, value);
2060                 } else {
2061                         Value converted;
2062                         Application::GetCurrent ()->ConvertKeyframeValue (target->GetType ()->GetKind (), property, value, &converted);
2063
2064                         if (converted.GetKind () == Type::INVALID) {
2065                                 printf ("Couldn't convert value.\n");
2066                                 return false;
2067                         }
2068                         frame->SetValue (ObjectKeyFrame::ConvertedValueProperty, converted);
2069                 }
2070         }
2071         KeyFrameAnimation_ResolveKeyFrames (this, frames);
2072         return true;
2073 }
2074
2075 Value*
2076 ObjectAnimationUsingKeyFrames::GetCurrentValue (Value *defaultOriginValue, Value *defaultDestinationValue,
2077                                                 AnimationClock* animationClock)
2078 {
2079         ObjectKeyFrameCollection *key_frames = GetKeyFrames ();
2080
2081         /* current segment info */
2082         TimeSpan current_time = animationClock->GetCurrentTime();
2083         ObjectKeyFrame *current_keyframe;
2084         ObjectKeyFrame *previous_keyframe;
2085         ObjectKeyFrame** keyframep = &previous_keyframe;
2086         Value *baseValue;
2087         bool deleteBaseValue;
2088
2089         current_keyframe = (ObjectKeyFrame*)key_frames->GetKeyFrameForTime (current_time, (KeyFrame**)keyframep);
2090         if (current_keyframe == NULL)
2091                 return NULL; /* XXX */
2092
2093         TimeSpan key_end_time = current_keyframe->resolved_keytime;
2094         TimeSpan key_start_time;
2095
2096         if (previous_keyframe == NULL) {
2097                 /* the first keyframe, start at the animation's base value */
2098                 baseValue = defaultOriginValue;
2099                 deleteBaseValue = false;
2100                 key_start_time = 0;
2101         } else {
2102                 /* start at the previous keyframe's target value */
2103                 baseValue = new Value (*previous_keyframe->GetConvertedValue ());
2104                 deleteBaseValue = true;
2105                 key_start_time = previous_keyframe->resolved_keytime;
2106         }
2107
2108         double progress;
2109
2110         if (current_time >= key_end_time) {
2111                 progress = 1.0;
2112         } else {
2113                 TimeSpan key_duration = key_end_time - key_start_time;
2114                 if (key_duration == 0)
2115                         progress = 1.0;
2116                 else
2117                         progress = (double)(current_time - key_start_time) / key_duration;
2118         }
2119
2120         /* get the current value out of that segment */
2121         Value *rv = current_keyframe->InterpolateValue (baseValue, progress);
2122
2123         if (deleteBaseValue)
2124                 delete baseValue;
2125
2126         return rv;;
2127 }
2128
2129 Duration
2130 ObjectAnimationUsingKeyFrames::GetNaturalDurationCore (Clock *clock)
2131 {
2132         ObjectKeyFrameCollection *key_frames = GetKeyFrames ();
2133
2134         KeyFrameAnimation_ResolveKeyFrames (this, key_frames);
2135
2136         guint len = key_frames->sorted_list->len;
2137         if (len > 0)
2138                 return ((KeyFrame *) key_frames->sorted_list->pdata[len - 1])->resolved_keytime;
2139         else
2140                 return Duration (0);
2141 }
2142
2143 bool
2144 ObjectAnimationUsingKeyFrames::Validate ()
2145 {
2146         // Interesting question -- should we check for null here?
2147         return generic_keyframe_validator (GetKeyFrames ());
2148 }
2149