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Steven Deutsch
2018-03-27 01:11:26 -05:00
parent b9c626d405
commit f70e1c82aa
1 changed files with 0 additions and 85 deletions
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Sources/Layout/MessagesCollectionViewFlowLayout+Avatar.swift
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/*
MIT License
Copyright (c) 2017-2018 MessageKit
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 Foundation
// MARK: - Open
extension MessagesCollectionViewFlowLayout {
/// Returns the `AvatarPosition` for the `MessageType` at a given `IndexPath`.
///
/// - Parameters:
/// - message: The `MessageType` for the given `IndexPath`.
/// - indexPath: The `IndexPath` for the given `MessageType`.
///
/// - Note: The default implementation of this method retrieves its value from
/// `avatarPosition(for:at:in)` in `MessagesLayoutDelegate`.
open func avatarPosition(for message: MessageType, at indexPath: IndexPath) -> AvatarPosition {
var position = messagesLayoutDelegate.avatarPosition(for: message, at: indexPath, in: messagesCollectionView)
switch position.horizontal {
case .cellTrailing, .cellLeading:
break
case .natural:
position.horizontal = messagesDataSource.isFromCurrentSender(message: message) ? .cellTrailing : .cellLeading
}
return position
}
/// Returns the `AvatarSize` for the `MessageType` at a given `IndexPath`.
///
/// - Parameters:
/// - message: The `MessageType` for the given `IndexPath`.
/// - indexPath: The `IndexPath` for the given `MessageType`.
/// - Note: The default implementation of this method retrieves its value from
/// `avatarSize(for:at:in)` in `MessagesLayoutDelegate`.
open func avatarSize(for message: MessageType, at indexPath: IndexPath) -> CGSize {
return messagesLayoutDelegate.avatarSize(for: message, at: indexPath, in: messagesCollectionView)
}
}
// MARK: - Internal
extension MessagesCollectionViewFlowLayout {
internal func _avatarPosition(for message: MessageType, at indexPath: IndexPath) -> AvatarPosition {
guard let cachedPosition = currentLayoutContext.avatarPosition else {
let position = avatarPosition(for: message, at: indexPath)
currentLayoutContext.avatarPosition = position
return position
}
return cachedPosition
}
internal func _avatarSize(for message: MessageType, at indexPath: IndexPath) -> CGSize {
guard let cachedSize = currentLayoutContext.avatarSize else {
let size = avatarSize(for: message, at: indexPath)
currentLayoutContext.avatarSize = size
return size
}
return cachedSize
}
}