91 lines
3.4 KiB
Swift
91 lines
3.4 KiB
Swift
//
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// FeedTableViewSectionHeaderLayout.swift
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// NetNewsWire-iOS
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//
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// Created by Maurice Parker on 11/5/19.
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// Copyright © 2019 Ranchero Software. All rights reserved.
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//
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import UIKit
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import RSCore
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struct FeedTableViewSectionHeaderLayout {
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private static let labelMarginRight = CGFloat(integerLiteral: 8)
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private static let unreadCountMarginRight = CGFloat(integerLiteral: 16)
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private static let disclosureButtonSize = CGSize(width: 44, height: 44)
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private static let verticalPadding = CGFloat(integerLiteral: 11)
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private static let minRowHeight = CGFloat(integerLiteral: 44)
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let titleRect: CGRect
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let unreadCountRect: CGRect
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let disclosureButtonRect: CGRect
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let height: CGFloat
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init(cellWidth: CGFloat, insets: UIEdgeInsets, label: UILabel, unreadCountView: FeedUnreadCountView) {
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let bounds = CGRect(x: insets.left, y: 0.0, width: floor(cellWidth - insets.right), height: 0.0)
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// Disclosure Button
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var rDisclosure = CGRect.zero
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rDisclosure.size = FeedTableViewSectionHeaderLayout.disclosureButtonSize
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rDisclosure.origin.x = bounds.origin.x
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// Unread Count
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let unreadCountSize = unreadCountView.contentSize
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let unreadCountIsHidden = unreadCountView.unreadCount < 1
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var rUnread = CGRect.zero
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if !unreadCountIsHidden {
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rUnread.size = unreadCountSize
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rUnread.origin.x = bounds.maxX - (FeedTableViewSectionHeaderLayout.unreadCountMarginRight + unreadCountSize.width)
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}
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// Max Unread Count
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// We can't reload Section Headers so we don't let the title extend into the (probably) worse case Unread Count area.
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let maxUnreadCountView = FeedUnreadCountView(frame: CGRect.zero)
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maxUnreadCountView.unreadCount = 888
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let maxUnreadCountSize = maxUnreadCountView.contentSize
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// Title
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let rLabelx = insets.left + FeedTableViewSectionHeaderLayout.disclosureButtonSize.width
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let rLabely = UIFontMetrics.default.scaledValue(for: FeedTableViewSectionHeaderLayout.verticalPadding)
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var labelWidth = CGFloat.zero
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labelWidth = cellWidth - (rLabelx + FeedTableViewSectionHeaderLayout.labelMarginRight + maxUnreadCountSize.width + FeedTableViewSectionHeaderLayout.unreadCountMarginRight)
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let labelSizeInfo = MultilineUILabelSizer.size(for: label.text ?? "", font: label.font, numberOfLines: 0, width: Int(floor(labelWidth)))
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var rLabel = CGRect(x: rLabelx, y: rLabely, width: labelWidth, height: labelSizeInfo.size.height)
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// Determine cell height
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let paddedLabelHeight = rLabel.maxY + UIFontMetrics.default.scaledValue(for: FeedTableViewSectionHeaderLayout.verticalPadding)
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let maxGraphicsHeight = [rUnread, rDisclosure].maxY()
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var cellHeight = max(paddedLabelHeight, maxGraphicsHeight)
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if cellHeight < FeedTableViewSectionHeaderLayout.minRowHeight {
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cellHeight = FeedTableViewSectionHeaderLayout.minRowHeight
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}
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// Center in Cell
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let newBounds = CGRect(x: bounds.origin.x, y: bounds.origin.y, width: bounds.width, height: cellHeight)
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if !unreadCountIsHidden {
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rUnread = FeedTableViewCellLayout.centerVertically(rUnread, newBounds)
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}
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rDisclosure = FeedTableViewCellLayout.centerVertically(rDisclosure, newBounds)
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// Small fonts need centered if we hit the minimum row height
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if cellHeight == FeedTableViewSectionHeaderLayout.minRowHeight {
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rLabel = FeedTableViewCellLayout.centerVertically(rLabel, newBounds)
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}
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// Assign the properties
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self.height = cellHeight
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self.unreadCountRect = rUnread
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self.disclosureButtonRect = rDisclosure
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self.titleRect = rLabel
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}
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}
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