MessageKit/Sources/Layout/MessagesCollectionViewLayoutAttributes.swift

// MIT License
//
// Copyright (c) 2017-2019 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 UIKit

/// The layout attributes used by a `MessageCollectionViewCell` to layout its subviews.
open class MessagesCollectionViewLayoutAttributes: UICollectionViewLayoutAttributes {
  // MARK: Open

  // MARK: - Methods

  open override func copy(with zone: NSZone? = nil) -> Any {
    // swiftlint:disable force_cast
    let copy = super.copy(with: zone) as! MessagesCollectionViewLayoutAttributes
    copy.avatarSize = avatarSize
    copy.avatarPosition = avatarPosition
    copy.avatarLeadingTrailingPadding = avatarLeadingTrailingPadding
    copy.messageContainerSize = messageContainerSize
    copy.messageContainerPadding = messageContainerPadding
    copy.messageLabelFont = messageLabelFont
    copy.messageLabelInsets = messageLabelInsets
    copy.cellTopLabelAlignment = cellTopLabelAlignment
    copy.cellTopLabelSize = cellTopLabelSize
    copy.cellBottomLabelAlignment = cellBottomLabelAlignment
    copy.cellBottomLabelSize = cellBottomLabelSize
    copy.messageTimeLabelSize = messageTimeLabelSize
    copy.messageTopLabelAlignment = messageTopLabelAlignment
    copy.messageTopLabelSize = messageTopLabelSize
    copy.messageBottomLabelAlignment = messageBottomLabelAlignment
    copy.messageBottomLabelSize = messageBottomLabelSize
    copy.accessoryViewSize = accessoryViewSize
    copy.accessoryViewPadding = accessoryViewPadding
    copy.accessoryViewPosition = accessoryViewPosition
    copy.linkPreviewFonts = linkPreviewFonts
    return copy
    // swiftlint:enable force_cast
  }

  open override func isEqual(_ object: Any?) -> Bool {
    // MARK: - LEAVE this as is
    if let attributes = object as? MessagesCollectionViewLayoutAttributes {
      return super.isEqual(object) && attributes.avatarSize == avatarSize
        && attributes.avatarPosition == avatarPosition
        && attributes.avatarLeadingTrailingPadding == avatarLeadingTrailingPadding
        && attributes.messageContainerSize == messageContainerSize
        && attributes.messageContainerPadding == messageContainerPadding
        && attributes.messageLabelFont == messageLabelFont
        && attributes.messageLabelInsets == messageLabelInsets
        && attributes.cellTopLabelAlignment == cellTopLabelAlignment
        && attributes.cellTopLabelSize == cellTopLabelSize
        && attributes.cellBottomLabelAlignment == cellBottomLabelAlignment
        && attributes.cellBottomLabelSize == cellBottomLabelSize
        && attributes.messageTimeLabelSize == messageTimeLabelSize
        && attributes.messageTopLabelAlignment == messageTopLabelAlignment
        && attributes.messageTopLabelSize == messageTopLabelSize
        && attributes.messageBottomLabelAlignment == messageBottomLabelAlignment
        && attributes.messageBottomLabelSize == messageBottomLabelSize
        && attributes.accessoryViewSize == accessoryViewSize
        && attributes.accessoryViewPadding == accessoryViewPadding
        && attributes.accessoryViewPosition == accessoryViewPosition
        && attributes.linkPreviewFonts == linkPreviewFonts
    } else {
      return false
    }
  }

  // MARK: Public

  // MARK: - Properties

  public var avatarSize: CGSize = .zero
  public var avatarPosition = AvatarPosition(vertical: .cellBottom)
  public var avatarLeadingTrailingPadding: CGFloat = 0

  public var messageContainerSize: CGSize = .zero
  public var messageContainerPadding: UIEdgeInsets = .zero
  public var messageLabelFont = UIFont.preferredFont(forTextStyle: .body)
  public var messageLabelInsets: UIEdgeInsets = .zero

  public var cellTopLabelAlignment = LabelAlignment(textAlignment: .center, textInsets: .zero)
  public var cellTopLabelSize: CGSize = .zero

  public var cellBottomLabelAlignment = LabelAlignment(textAlignment: .center, textInsets: .zero)
  public var cellBottomLabelSize: CGSize = .zero

  public var messageTopLabelAlignment = LabelAlignment(textAlignment: .center, textInsets: .zero)
  public var messageTopLabelSize: CGSize = .zero

  public var messageBottomLabelAlignment = LabelAlignment(textAlignment: .center, textInsets: .zero)
  public var messageBottomLabelSize: CGSize = .zero

  public var messageTimeLabelSize: CGSize = .zero

  public var accessoryViewSize: CGSize = .zero
  public var accessoryViewPadding: HorizontalEdgeInsets = .zero
  public var accessoryViewPosition: AccessoryPosition = .messageCenter

  public var linkPreviewFonts = LinkPreviewFonts(
    titleFont: .preferredFont(forTextStyle: .footnote),
    teaserFont: .preferredFont(forTextStyle: .caption2),
    domainFont: .preferredFont(forTextStyle: .caption1))
}