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//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public class ConversationLayoutInfo: NSObject {
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private let thread: TSThread
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private let isRTL: Bool
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// The width of the collection view.
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@objc public var viewWidth: CGFloat = 0 {
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didSet {
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SwiftAssertIsOnMainThread(#function)
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updateProperties()
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}
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}
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@objc public let contentMarginTop: CGFloat = 10
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@objc public let contentMarginBottom: CGFloat = 10
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@objc public var gutterLeading: CGFloat = 0
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@objc public var gutterTrailing: CGFloat = 0
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// These are the gutters used by "full width" views
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// like "date headers" and "unread indicator".
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@objc public var fullWidthGutterLeading: CGFloat = 0
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@objc public var fullWidthGutterTrailing: CGFloat = 0
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// viewWidth - (gutterLeading + gutterTrailing)
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@objc public var contentWidth: CGFloat = 0
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// viewWidth - (gutterfullWidthGutterLeadingLeading + fullWidthGutterTrailing)
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// TODO: Is this necessary?
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@objc public var fullWidthContentWidth: CGFloat = 0
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@objc public var maxMessageWidth: CGFloat = 0
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@objc public var maxFooterWidth: CGFloat = 0
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@objc
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public required init(thread: TSThread) {
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self.thread = thread
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self.isRTL = CurrentAppContext().isRTL
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super.init()
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updateProperties()
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}
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private func updateProperties() {
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if thread.isGroupThread() {
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gutterLeading = 16
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gutterTrailing = 20
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} else {
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gutterLeading = 40
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gutterTrailing = 20
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}
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// TODO: Should these be symmetric? Should they reflect the other gutters?
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fullWidthGutterLeading = 20
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fullWidthGutterTrailing = 20
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contentWidth = viewWidth - (gutterLeading + gutterTrailing)
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fullWidthContentWidth = viewWidth - (fullWidthGutterLeading + fullWidthGutterTrailing)
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maxMessageWidth = floor(contentWidth * 0.8)
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maxFooterWidth = floor(contentWidth - 100)
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}
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}
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