76 lines
2.7 KiB
Swift
76 lines
2.7 KiB
Swift
//
|
|
// Copyright (c) 2017 Touch Instinct
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the Software), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
//
|
|
|
|
import CoreGraphics.CGGeometry
|
|
|
|
public extension CGSize {
|
|
|
|
/// Calculates rect "inside" CGSize to match requested size with accordance to resize mode.
|
|
///
|
|
/// - Parameters:
|
|
/// - newSize: Requested new size.
|
|
/// - resizeMode: Resize mode to use.
|
|
/// - Returns: A new CGRect instance matching request parameters.
|
|
func resizeRect(forNewSize newSize: CGSize, resizeMode: ResizeMode) -> CGRect {
|
|
let horizontalRatio = newSize.width / width
|
|
let verticalRatio = newSize.height / height
|
|
|
|
let ratio: CGFloat
|
|
|
|
switch resizeMode {
|
|
case .scaleToFill:
|
|
ratio = 1
|
|
|
|
case .scaleAspectFill:
|
|
ratio = max(horizontalRatio, verticalRatio)
|
|
|
|
case .scaleAspectFit:
|
|
ratio = min(horizontalRatio, verticalRatio)
|
|
}
|
|
|
|
let newWidth = resizeMode == .scaleToFill ? newSize.width : width * ratio
|
|
let newHeight = resizeMode == .scaleToFill ? newSize.height : height * ratio
|
|
|
|
let originX: CGFloat
|
|
let originY: CGFloat
|
|
|
|
if newWidth > newSize.width {
|
|
originX = (newSize.width - newWidth) / 2
|
|
} else if newWidth < newSize.width {
|
|
originX = newSize.width / 2 - newWidth / 2
|
|
} else {
|
|
originX = 0
|
|
}
|
|
|
|
if newHeight > newSize.height {
|
|
originY = (newSize.height - newHeight) / 2
|
|
} else if newHeight < newSize.height {
|
|
originY = newSize.height / 2 - newHeight / 2
|
|
} else {
|
|
originY = 0
|
|
}
|
|
|
|
return CGRect(origin: CGPoint(x: originX, y: originY),
|
|
size: CGSize(width: newWidth, height: newHeight))
|
|
}
|
|
}
|