56 lines
1.9 KiB
Swift
56 lines
1.9 KiB
Swift
//
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// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import SignalServiceKit
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public extension UIEdgeInsets {
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func inverted() -> UIEdgeInsets {
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return UIEdgeInsets(top: -top, left: -left, bottom: -bottom, right: -right)
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}
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}
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public extension CGSize {
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func roundedForScreenScale() -> CGSize {
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let screenScale = UIScreen.main.scale
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guard screenScale > 1 else { return self }
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return CGSize(
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width: (width * screenScale).rounded(.up) / screenScale,
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height: (height * screenScale).rounded(.up) / screenScale
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)
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}
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}
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public extension CGFloat {
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static let hairlineWidth: CGFloat = 1 / UIScreen.main.scale
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static func hairlineWidthFraction(_ fraction: CGFloat) -> CGFloat {
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fraction * .hairlineWidth
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}
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private static let iPhone5ScreenWidth: CGFloat = 320
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private static let iPhone7PlusScreenWidth: CGFloat = 414
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// A convenience method for doing responsive layout. Scales between two
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// reference values (for iPhone 5 and iPhone 7 Plus) to the current device
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// based on screen width, linearly interpolating.
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static func scaleFromIPhone5To7Plus(_ iPhone5Value: CGFloat, _ iPhone7PlusValue: CGFloat) -> CGFloat {
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let shortDimension = CurrentAppContext().frame.size.smallerAxis
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let alpha = CGFloatClamp01(CGFloatInverseLerp(shortDimension, iPhone5ScreenWidth, iPhone7PlusScreenWidth))
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return CGFloatLerp(iPhone5Value, iPhone7PlusValue, alpha).rounded()
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}
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// A convenience method for doing responsive layout. Scales a reference
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// value (for iPhone 5) to the current device based on screen width,
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// linearly interpolating through the origin.
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static func scaleFromIPhone5(_ iPhone5Value: CGFloat) -> CGFloat {
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let shortDimension = CurrentAppContext().frame.size.smallerAxis
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return (iPhone5Value * shortDimension / iPhone5ScreenWidth).rounded()
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}
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}
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