mirror of
https://github.com/MessageKit/MessageKit.git
synced 2026-02-06 19:03:19 +00:00
Wu Zhong
244 lines
12 KiB
Swift
244 lines
12 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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import MapKit
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/// A protocol used by the `MessagesViewController` to customize the appearance of a `MessagesCollectionViewCell`.
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public protocol MessagesDisplayDelegate: AnyObject {
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// MARK: - All Messages
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/// Specifies the `MessageStyle` to be used for a `MessageContainerView`.
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///
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/// - Parameters:
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/// - message: The `MessageType` that will be displayed by this cell.
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/// - indexPath: The `IndexPath` of the cell.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this cell will be displayed.
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///
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/// The default value returned by this method is `MessageStyle.bubble`.
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func messageStyle(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageStyle
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/// Specifies the background color of the `MessageContainerView`.
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///
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/// - Parameters:
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/// - message: The `MessageType` that will be displayed by this cell.
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/// - indexPath: The `IndexPath` of the cell.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this cell will be displayed.
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///
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/// The default value is `UIColor.clear` for emoji messages. For all other `MessageData` cases, the color depends on the `Sender`:
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///
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/// Current Sender: Green
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///
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/// All other Senders: Gray
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func backgroundColor(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> UIColor
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/// The section header to use for a given `MessageType`.
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///
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/// - Parameters:
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/// - message: The `MessageType` that will be displayed for this header.
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/// - indexPath: The `IndexPath` of the header.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this header will be displayed.
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///
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/// The default value returned by this method is a `MessageDateHeaderView`.
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func messageHeaderView(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageHeaderView
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/// Used by the `MessageLayoutDelegate` method `headerViewSize(_:_:_:)` to determine if a header should be displayed.
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/// This method checks `MessageCollectionView`'s `showsDateHeaderAfterTimeInterval` property and returns true if
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/// the current messages sent date occurs after the specified time interval when compared to the previous message.
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///
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/// - Parameters:
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/// - message: The `MessageType` that will be displayed for this header.
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/// - indexPath: The `IndexPath` of the header.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this header will be displayed.
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func shouldDisplayHeader(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> Bool
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/// The section footer to use for a given `MessageType`.
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///
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/// - Parameters:
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/// - message: The `MessageType` that will be displayed for this footer.
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/// - indexPath: The `IndexPath` of the footer.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this footer will be displayed.
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///
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/// The default value returned by this method is a `MessageFooterView`.
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func messageFooterView(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageFooterView
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/// Configure `AvatarView`‘s image.
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///
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/// - Parameters:
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/// - avatarView: The `AvatarView` of the cell.
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/// - message: The `MessageType` that will be displayed by this cell.
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/// - indexPath: The `IndexPath` of the cell.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this cell will be displayed.
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///
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/// The default image configured by this method is `?`.
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func configureAvatarView(_ avatarView: AvatarView, for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView)
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// MARK: - Text Messages
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/// Specifies the color of the text for a `TextMessageCell`.
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///
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/// - Parameters:
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/// - message: A `MessageType` with a `MessageData` case of `.text` or `.attributedText` to which the color will apply.
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/// - indexPath: The `IndexPath` of the cell.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this cell will be displayed.
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///
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/// The default value returned by this method is determined by the messages `Sender`:
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///
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/// Current Sender: UIColor.white
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///
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/// All other Senders: UIColor.darkText
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func textColor(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> UIColor
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/// Specifies the `DetectorType`s to check for the `MessageType`'s text against.
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///
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/// - Parameters:
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/// - message: A `MessageType` with a `MessageData` case of `.text` or `.attributedText` to which the detectors will apply.
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/// - indexPath: The `IndexPath` of the cell.
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/// - messagesCollectionView: The `MessagesCollectionView` in which this cell will be displayed.
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///
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/// The default value returned by this method is all available detector types.
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func enabledDetectors(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> [DetectorType]
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/// Specifies the attributes for a given `DetectorType`
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///
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/// - Parameters:
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/// - detector: The `DetectorType` for the applied attributes.
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/// - message: A `MessageType` with a `MessageData` case of `.text` or `.attributedText`
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/// to which the detectors will apply.
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/// - indexPath: The `IndexPath` of the cell.
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func detectorAttributes(for detector: DetectorType, and message: MessageType, at indexPath: IndexPath) -> [NSAttributedStringKey: Any]
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// MARK: - Location Messages
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/// Ask the delegate for a LocationMessageSnapshotOptions instance to customize the MapView on the given message
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///
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/// - Parameters:
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/// - message: The location message to be customized
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/// - indexPath: Message's index path
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/// - messagesCollectionView: The collection view requesting the information
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/// - Returns: Your LocationMessageSnapshotOptions instance with the options to customize map style
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func snapshotOptionsForLocation(message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> LocationMessageSnapshotOptions
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/// Ask the delegate for a custom MKAnnotationView to show on the given message.
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/// You can return nil if you don't want to show any annotation.
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///
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/// default: MKPinAnnotationView
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///
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/// - Parameters:
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/// - message: The location message with the annotation to customize
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/// - indexPath: Message's index path
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/// - messageCollectionView: The collection view requesting the information
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/// - Returns: Your customized MKAnnotationView or nil to not show any.
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func annotationViewForLocation(message: MessageType, at indexPath: IndexPath, in messageCollectionView: MessagesCollectionView) -> MKAnnotationView?
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/// Ask the delegate for a custom animation block to run when whe map screenshot is ready to be displaied in the given location message
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/// The animation block is called with the image view to be animated. You can animate it with CoreAnimation, UIView.animate or any library you prefer.
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///
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/// default: nil
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///
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/// - Parameters:
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/// - message: The location message with the map to animate
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/// - indexPath: Message's index path
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/// - messagesCollectionView: The collection view requesting the information
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/// - Returns: Your customized animation block.
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func animationBlockForLocation(message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> ((UIImageView) -> Void)?
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}
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public extension MessagesDisplayDelegate {
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// MARK: - All Messages Defaults
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func messageStyle(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageStyle {
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return .bubble
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}
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func backgroundColor(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> UIColor {
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switch message.data {
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case .emoji:
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return .clear
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default:
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guard let dataSource = messagesCollectionView.messagesDataSource else { return .white }
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return dataSource.isFromCurrentSender(message: message) ? .outgoingGreen : .incomingGray
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}
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}
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func messageHeaderView(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageHeaderView {
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let header = messagesCollectionView.dequeueReusableHeaderView(MessageDateHeaderView.self, for: indexPath)
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header.dateLabel.text = MessageKitDateFormatter.shared.string(from: message.sentDate)
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return header
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}
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func shouldDisplayHeader(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> Bool {
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guard let dataSource = messagesCollectionView.messagesDataSource else { return false }
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if indexPath.section == 0 { return false }
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let previousSection = indexPath.section - 1
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let previousIndexPath = IndexPath(item: 0, section: previousSection)
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let previousMessage = dataSource.messageForItem(at: previousIndexPath, in: messagesCollectionView)
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let timeIntervalSinceLastMessage = message.sentDate.timeIntervalSince(previousMessage.sentDate)
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return timeIntervalSinceLastMessage >= messagesCollectionView.showsDateHeaderAfterTimeInterval
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}
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func messageFooterView(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageFooterView {
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return messagesCollectionView.dequeueReusableFooterView(MessageFooterView.self, for: indexPath)
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}
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func configureAvatarView(_ avatarView: AvatarView, for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) {
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avatarView.initials = "?"
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}
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// MARK: - Text Messages Defaults
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func textColor(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> UIColor {
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guard let dataSource = messagesCollectionView.messagesDataSource else {
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fatalError(MessageKitError.nilMessagesDataSource)
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}
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return dataSource.isFromCurrentSender(message: message) ? .white : .darkText
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}
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func enabledDetectors(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> [DetectorType] {
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return []
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}
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func detectorAttributes(for detector: DetectorType, and message: MessageType, at indexPath: IndexPath) -> [NSAttributedStringKey: Any] {
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return MessageLabel.defaultAttributes
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}
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// MARK: - Location Messages Defaults
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func snapshotOptionsForLocation(message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> LocationMessageSnapshotOptions {
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return LocationMessageSnapshotOptions()
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}
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func annotationViewForLocation(message: MessageType, at indexPath: IndexPath, in messageCollectionView: MessagesCollectionView) -> MKAnnotationView? {
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return MKPinAnnotationView(annotation: nil, reuseIdentifier: nil)
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}
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func animationBlockForLocation(message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> ((UIImageView) -> Void)? {
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return nil
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}
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}
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