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[ASLayout] General Layout Cleanup (#2920)

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* Remove duplicate import

* Move `ASLayoutController` related code out of CoreGraphics+ASConvenience

* Further cleanup

* Move private layout files to Privat/Layout

* Move ASLayoutElementStylePrivate into Private/Layout

* Further cleanup

* Move tvOS related files to tvOS folder

* Further cleanup
This commit is contained in:
Michael Schneider
2017-01-24 11:54:05 -08:00
committed by GitHub
parent 9a5f6d3ece
commit d9be4783e5
43 changed files with 229 additions and 199 deletions
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64
AsyncDisplayKit/Details/ASAbstractLayoutController.mm
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@@ -9,7 +9,9 @@
//
#import "ASAbstractLayoutController.h"
#import "ASAssert.h"
#include <vector>
extern ASRangeTuningParameters const ASRangeTuningParametersZero = {};
@@ -19,6 +21,68 @@ extern BOOL ASRangeTuningParametersEqualToRangeTuningParameters(ASRangeTuningPar
return lhs.leadingBufferScreenfuls == rhs.leadingBufferScreenfuls && lhs.trailingBufferScreenfuls == rhs.trailingBufferScreenfuls;
}
extern ASDirectionalScreenfulBuffer ASDirectionalScreenfulBufferHorizontal(ASScrollDirection scrollDirection,
ASRangeTuningParameters rangeTuningParameters)
{
ASDirectionalScreenfulBuffer horizontalBuffer = {0, 0};
BOOL movingRight = ASScrollDirectionContainsRight(scrollDirection);
horizontalBuffer.positiveDirection = movingRight ? rangeTuningParameters.leadingBufferScreenfuls
: rangeTuningParameters.trailingBufferScreenfuls;
horizontalBuffer.negativeDirection = movingRight ? rangeTuningParameters.trailingBufferScreenfuls
: rangeTuningParameters.leadingBufferScreenfuls;
return horizontalBuffer;
}
extern ASDirectionalScreenfulBuffer ASDirectionalScreenfulBufferVertical(ASScrollDirection scrollDirection,
ASRangeTuningParameters rangeTuningParameters)
{
ASDirectionalScreenfulBuffer verticalBuffer = {0, 0};
BOOL movingDown = ASScrollDirectionContainsDown(scrollDirection);
verticalBuffer.positiveDirection = movingDown ? rangeTuningParameters.leadingBufferScreenfuls
: rangeTuningParameters.trailingBufferScreenfuls;
verticalBuffer.negativeDirection = movingDown ? rangeTuningParameters.trailingBufferScreenfuls
: rangeTuningParameters.leadingBufferScreenfuls;
return verticalBuffer;
}
extern CGRect CGRectExpandHorizontally(CGRect rect, ASDirectionalScreenfulBuffer buffer)
{
CGFloat negativeDirectionWidth = buffer.negativeDirection * rect.size.width;
CGFloat positiveDirectionWidth = buffer.positiveDirection * rect.size.width;
rect.size.width = negativeDirectionWidth + rect.size.width + positiveDirectionWidth;
rect.origin.x -= negativeDirectionWidth;
return rect;
}
extern CGRect CGRectExpandVertically(CGRect rect, ASDirectionalScreenfulBuffer buffer)
{
CGFloat negativeDirectionHeight = buffer.negativeDirection * rect.size.height;
CGFloat positiveDirectionHeight = buffer.positiveDirection * rect.size.height;
rect.size.height = negativeDirectionHeight + rect.size.height + positiveDirectionHeight;
rect.origin.y -= negativeDirectionHeight;
return rect;
}
extern CGRect CGRectExpandToRangeWithScrollableDirections(CGRect rect, ASRangeTuningParameters tuningParameters,
ASScrollDirection scrollableDirections, ASScrollDirection scrollDirection)
{
// Can scroll horizontally - expand the range appropriately
if (ASScrollDirectionContainsHorizontalDirection(scrollableDirections)) {
ASDirectionalScreenfulBuffer horizontalBuffer = ASDirectionalScreenfulBufferHorizontal(scrollDirection, tuningParameters);
rect = CGRectExpandHorizontally(rect, horizontalBuffer);
}
// Can scroll vertically - expand the range appropriately
if (ASScrollDirectionContainsVerticalDirection(scrollableDirections)) {
ASDirectionalScreenfulBuffer verticalBuffer = ASDirectionalScreenfulBufferVertical(scrollDirection, tuningParameters);
rect = CGRectExpandVertically(rect, verticalBuffer);
}
return rect;
}
@interface ASAbstractLayoutController () {
std::vector<std::vector<ASRangeTuningParameters>> _tuningParameters;
CGSize _viewportSize;