mirror of
https://github.com/MessageKit/MessageKit.git
synced 2026-02-06 19:03:19 +00:00
zhongwuzw
49 lines
2.0 KiB
Swift
49 lines
2.0 KiB
Swift
/*
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MIT License
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Copyright (c) 2017-2018 MessageKit
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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 all
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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 THE
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SOFTWARE.
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*/
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import Foundation
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open class MediaMessageSizeCalculator: MessageSizeCalculator {
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open override func messageContainerSize(for message: MessageType) -> CGSize {
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let maxWidth = messageContainerMaxWidth(for: message)
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let sizeForMediaItem = { (maxWidth: CGFloat, item: MediaItem) -> CGSize in
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if maxWidth < item.size.width {
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// Maintain the ratio if width is too great
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let height = maxWidth * item.size.height / item.size.width
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return CGSize(width: maxWidth, height: height)
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}
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return item.size
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}
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switch message.kind {
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case .photo(let item):
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return sizeForMediaItem(maxWidth, item)
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case .video(let item):
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return sizeForMediaItem(maxWidth, item)
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default:
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fatalError("messageContainerSize received unhandled MessageDataType: \(message.kind)")
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}
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}
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}
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