void reverse_frames(Document* doc, const DocumentRange& range)
{
const app::Context* context = static_cast<app::Context*>(doc->context());
const ContextReader reader(context);
ContextWriter writer(reader);
Transaction transaction(writer.context(), "Reverse Frames");
DocumentApi api = doc->getApi(transaction);
Sprite* sprite = doc->sprite();
frame_t frameBegin, frameEnd;
int layerBegin, layerEnd;
bool moveFrames = false;
switch (range.type()) {
case DocumentRange::kCels:
frameBegin = range.frameBegin();
frameEnd = range.frameEnd();
layerBegin = range.layerBegin();
layerEnd = range.layerEnd() + 1;
break;
case DocumentRange::kFrames:
frameBegin = range.frameBegin();
frameEnd = range.frameEnd();
moveFrames = true;
break;
case DocumentRange::kLayers:
frameBegin = frame_t(0);
frameEnd = sprite->totalFrames()-1;
layerBegin = range.layerBegin();
layerEnd = range.layerEnd() + 1;
break;
}
if (moveFrames) {
for (frame_t frameRev = frameEnd+1;
frameRev > frameBegin;
--frameRev) {
api.moveFrame(sprite, frameBegin, frameRev);
}
}
else {
std::vector<Layer*> layers;
sprite->getLayersList(layers);
for (int layerIdx = layerBegin; layerIdx != layerEnd; ++layerIdx) {
for (frame_t frame = frameBegin,
frameRev = frameEnd;
frame != (frameBegin+frameEnd)/2+1;
++frame, --frameRev) {
LayerImage* layer = static_cast<LayerImage*>(layers[layerIdx]);
api.swapCel(layer, frame, frameRev);
}
}
}
transaction.commit();
}
static DocumentRange drop_range_op(
Document* doc, Op op, const DocumentRange& from,
DocumentRangePlace place, const DocumentRange& to)
{
if (place != kDocumentRangeBefore &&
place != kDocumentRangeAfter) {
ASSERT(false);
throw std::invalid_argument("Invalid 'place' argument");
}
Sprite* sprite = doc->sprite();
// Check noop/trivial/do nothing cases, i.e., move a range to the same place.
// Also check invalid cases, like moving a Background layer.
switch (from.type()) {
case DocumentRange::kCels:
if (from == to)
return from;
break;
case DocumentRange::kFrames:
if (op == Move) {
if ((to.frameBegin() >= from.frameBegin() && to.frameEnd() <= from.frameEnd()) ||
(place == kDocumentRangeBefore && to.frameBegin() == from.frameEnd()+1) ||
(place == kDocumentRangeAfter && to.frameEnd() == from.frameBegin()-1))
return from;
}
break;
case DocumentRange::kLayers:
if (op == Move) {
if ((to.layerBegin() >= from.layerBegin() && to.layerEnd() <= from.layerEnd()) ||
(place == kDocumentRangeBefore && to.layerBegin() == from.layerEnd()+1) ||
(place == kDocumentRangeAfter && to.layerEnd() == from.layerBegin()-1))
return from;
// We cannot move the background
for (LayerIndex i = from.layerBegin(); i <= from.layerEnd(); ++i)
if (sprite->indexToLayer(i)->isBackground())
throw std::runtime_error("The background layer cannot be moved");
// Before background
if (place == kDocumentRangeBefore) {
Layer* background = sprite->indexToLayer(to.layerBegin());
if (background && background->isBackground())
throw std::runtime_error("You cannot move something below the background layer");
}
}
break;
}
const char* undoLabel = NULL;
switch (op) {
case Move: undoLabel = "Move Range"; break;
case Copy: undoLabel = "Copy Range"; break;
default:
ASSERT(false);
throw std::invalid_argument("Invalid 'op' argument");
}
DocumentRange resultRange;
{
const app::Context* context = static_cast<app::Context*>(doc->context());
const ContextReader reader(context);
ContextWriter writer(reader);
Transaction transaction(writer.context(), undoLabel, ModifyDocument);
DocumentApi api = doc->getApi(transaction);
// TODO Try to add the range with just one call to DocumentApi
// methods, to avoid generating a lot of SetCelFrame undoers (see
// DocumentApi::setCelFramePosition).
switch (from.type()) {
case DocumentRange::kCels:
{
std::vector<Layer*> layers;
sprite->getLayersList(layers);
int srcLayerBegin, srcLayerStep, srcLayerEnd;
int dstLayerBegin, dstLayerStep;
frame_t srcFrameBegin, srcFrameStep, srcFrameEnd;
frame_t dstFrameBegin, dstFrameStep;
if (to.layerBegin() <= from.layerBegin()) {
srcLayerBegin = from.layerBegin();
srcLayerStep = 1;
srcLayerEnd = from.layerEnd()+1;
dstLayerBegin = to.layerBegin();
dstLayerStep = 1;
}
else {
srcLayerBegin = from.layerEnd();
srcLayerStep = -1;
srcLayerEnd = from.layerBegin()-1;
dstLayerBegin = to.layerEnd();
dstLayerStep = -1;
}
if (to.frameBegin() <= from.frameBegin()) {
srcFrameBegin = from.frameBegin();
srcFrameStep = frame_t(1);
srcFrameEnd = from.frameEnd()+1;
dstFrameBegin = to.frameBegin();
dstFrameStep = frame_t(1);
}
else {
srcFrameBegin = from.frameEnd();
srcFrameStep = frame_t(-1);
srcFrameEnd = from.frameBegin()-1;
dstFrameBegin = to.frameEnd();
dstFrameStep = frame_t(-1);
}
for (int srcLayerIdx = srcLayerBegin,
dstLayerIdx = dstLayerBegin; srcLayerIdx != srcLayerEnd; ) {
for (frame_t srcFrame = srcFrameBegin,
dstFrame = dstFrameBegin; srcFrame != srcFrameEnd; ) {
LayerImage* srcLayer = static_cast<LayerImage*>(layers[srcLayerIdx]);
LayerImage* dstLayer = static_cast<LayerImage*>(layers[dstLayerIdx]);
switch (op) {
case Move: api.moveCel(srcLayer, srcFrame, dstLayer, dstFrame); break;
case Copy: api.copyCel(srcLayer, srcFrame, dstLayer, dstFrame); break;
}
srcFrame += srcFrameStep;
dstFrame += dstFrameStep;
}
srcLayerIdx += srcLayerStep;
dstLayerIdx += dstLayerStep;
}
resultRange = to;
}
break;
case DocumentRange::kFrames:
{
frame_t srcFrameBegin = 0, srcFrameStep, srcFrameEnd = 0;
frame_t dstFrameBegin = 0, dstFrameStep;
switch (op) {
case Move:
if (place == kDocumentRangeBefore) {
if (to.frameBegin() <= from.frameBegin()) {
srcFrameBegin = from.frameBegin();
srcFrameStep = frame_t(1);
srcFrameEnd = from.frameEnd()+1;
dstFrameBegin = to.frameBegin();
dstFrameStep = frame_t(1);
}
else {
srcFrameBegin = from.frameEnd();
srcFrameStep = frame_t(-1);
srcFrameEnd = from.frameBegin()-1;
dstFrameBegin = to.frameBegin();
dstFrameStep = frame_t(-1);
}
}
else if (place == kDocumentRangeAfter) {
if (to.frameEnd() <= from.frameBegin()) {
srcFrameBegin = from.frameBegin();
srcFrameStep = frame_t(1);
srcFrameEnd = from.frameEnd()+1;
dstFrameBegin = to.frameEnd()+1;
dstFrameStep = frame_t(1);
}
else {
srcFrameBegin = from.frameEnd();
srcFrameStep = frame_t(-1);
srcFrameEnd = from.frameBegin()-1;
dstFrameBegin = to.frameEnd()+1;
dstFrameStep = frame_t(-1);
}
}
break;
case Copy:
if (place == kDocumentRangeBefore) {
if (to.frameBegin() <= from.frameBegin()) {
srcFrameBegin = from.frameBegin();
srcFrameStep = frame_t(2);
srcFrameEnd = from.frameBegin() + 2*from.frames();
dstFrameBegin = to.frameBegin();
dstFrameStep = frame_t(1);
}
else {
srcFrameBegin = from.frameEnd();
srcFrameStep = frame_t(-1);
srcFrameEnd = from.frameBegin()-1;
dstFrameBegin = to.frameBegin();
dstFrameStep = frame_t(0);
}
}
else if (place == kDocumentRangeAfter) {
if (to.frameEnd() <= from.frameBegin()) {
srcFrameBegin = from.frameBegin();
srcFrameStep = frame_t(2);
srcFrameEnd = from.frameBegin() + 2*from.frames();
dstFrameBegin = to.frameEnd()+1;
dstFrameStep = frame_t(1);
}
else {
srcFrameBegin = from.frameEnd();
srcFrameStep = frame_t(-1);
srcFrameEnd = from.frameBegin()-1;
dstFrameBegin = to.frameEnd()+1;
dstFrameStep = frame_t(0);
}
}
break;
}
for (frame_t srcFrame = srcFrameBegin,
dstFrame = dstFrameBegin; srcFrame != srcFrameEnd; ) {
switch (op) {
case Move: api.moveFrame(sprite, srcFrame, dstFrame); break;
case Copy: api.copyFrame(sprite, srcFrame, dstFrame); break;
}
srcFrame += srcFrameStep;
dstFrame += dstFrameStep;
}
if (place == kDocumentRangeBefore) {
resultRange.startRange(LayerIndex::NoLayer, frame_t(to.frameBegin()), from.type());
resultRange.endRange(LayerIndex::NoLayer, frame_t(to.frameBegin()+from.frames()-1));
}
else if (place == kDocumentRangeAfter) {
resultRange.startRange(LayerIndex::NoLayer, frame_t(to.frameEnd()+1), from.type());
resultRange.endRange(LayerIndex::NoLayer, frame_t(to.frameEnd()+1+from.frames()-1));
}
if (op == Move && from.frameBegin() < to.frameBegin())
resultRange.displace(0, -from.frames());
}
break;
case DocumentRange::kLayers:
{
std::vector<Layer*> layers;
sprite->getLayersList(layers);
if (layers.empty())
break;
switch (op) {
case Move:
if (place == kDocumentRangeBefore) {
for (LayerIndex i = from.layerBegin(); i <= from.layerEnd(); ++i) {
api.restackLayerBefore(
layers[i],
layers[to.layerBegin()]);
}
}
else if (place == kDocumentRangeAfter) {
for (LayerIndex i = from.layerEnd(); i >= from.layerBegin(); --i) {
api.restackLayerAfter(
layers[i],
layers[to.layerEnd()]);
}
}
break;
case Copy:
if (place == kDocumentRangeBefore) {
for (LayerIndex i = from.layerBegin(); i <= from.layerEnd(); ++i) {
api.duplicateLayerBefore(
layers[i],
layers[to.layerBegin()]);
}
}
else if (place == kDocumentRangeAfter) {
for (LayerIndex i = from.layerEnd(); i >= from.layerBegin(); --i) {
api.duplicateLayerAfter(
layers[i],
layers[to.layerEnd()]);
}
}
break;
}
if (place == kDocumentRangeBefore) {
resultRange.startRange(LayerIndex(to.layerBegin()), frame_t(-1), from.type());
resultRange.endRange(LayerIndex(to.layerBegin()+from.layers()-1), frame_t(-1));
}
else if (place == kDocumentRangeAfter) {
resultRange.startRange(LayerIndex(to.layerEnd()+1), frame_t(-1), from.type());
resultRange.endRange(LayerIndex(to.layerEnd()+1+from.layers()-1), frame_t(-1));
}
if (op == Move && from.layerBegin() < to.layerBegin())
resultRange.displace(-from.layers(), 0);
}
break;
}
transaction.commit();
}
return resultRange;
}