45 lines
1.8 KiB
Swift
45 lines
1.8 KiB
Swift
/*
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The MIT License (MIT)
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Copyright (c) 2015-present Badoo Trading Limited.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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struct PhotosInputViewItemSizeCalculator {
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var itemsPerRow: Int = 0
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var interitemSpace: CGFloat = 0
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func itemSizeForWidth(width: CGFloat, atIndex index: Int) -> CGSize {
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let availableWidth = width - self.interitemSpace * CGFloat((self.itemsPerRow - 1));
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if availableWidth <= 0 {
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return CGSize.zero
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}
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var itemWidth = Int(floor(availableWidth / CGFloat(self.itemsPerRow)))
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let itemHeigth = itemWidth
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let extraPixels = Int(availableWidth) % self.itemsPerRow
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let isItemWithExtraPixel = index % self.itemsPerRow < extraPixels
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if isItemWithExtraPixel {
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itemWidth++
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}
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return CGSize(width: itemWidth, height: itemHeigth)
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}
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}
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