40 lines
1.3 KiB
Swift
40 lines
1.3 KiB
Swift
extension CGSize {
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/// Calculates the aspect ratio of the size.
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///
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/// - returns: aspectRatio The aspect ratio of the size.
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var aspectRatio: CGFloat {
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if height == 0 { return 1 }
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return width / height
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}
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/// Finds a new size constrained by a size keeping the aspect ratio.
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///
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/// - parameter size: The contraining size.
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/// - returns: size A new size that fits inside the contraining size with the same aspect ratio.
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func constrained(by size: CGSize) -> CGSize {
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let aspectWidth = round(aspectRatio * size.height)
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let aspectHeight = round(size.width / aspectRatio)
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if aspectWidth > size.width {
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return CGSize(width: size.width, height: aspectHeight)
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} else {
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return CGSize(width: aspectWidth, height: size.height)
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}
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}
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/// Finds a new size filling the given size while keeping the aspect ratio.
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///
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/// - parameter size: The contraining size.
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/// - returns: size A new size that fills the contraining size keeping the same aspect ratio.
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func filling(_ size: CGSize) -> CGSize {
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let aspectWidth = round(aspectRatio * size.height)
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let aspectHeight = round(size.width / aspectRatio)
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if aspectWidth > size.width {
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return CGSize(width: aspectWidth, height: size.height)
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} else {
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return CGSize(width: size.width, height: aspectHeight)
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}
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}
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}
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