NetNewsWire/iOS/Timeline/Cell/MasterTimelineCellLayout.swift

257 lines
9.3 KiB
Swift

//
// MasterTimelineCellLayout.swift
// NetNewsWire
//
// Created by Brent Simmons on 2/6/16.
// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
//
import UIKit
import RSCore
struct MasterTimelineCellLayout {
static let cellPadding = UIEdgeInsets(top: 8, left: 16, bottom: 8, right: 16)
static let feedColor = AppAssets.timelineTextSecondaryColor
static let feedNameFont = UIFont.systemFont(ofSize: UIFont.systemFontSize)
static let dateColor = AppAssets.timelineTextSecondaryColor
static let dateFont = UIFont.systemFont(ofSize: UIFont.systemFontSize, weight: UIFont.Weight.bold)
static let dateMarginBottom = CGFloat(integerLiteral: 1)
static let titleColor = AppAssets.timelineTextPrimaryColor
static let titleFont = UIFont.systemFont(ofSize: UIFont.systemFontSize, weight: .semibold)
static let titleBottomMargin = CGFloat(integerLiteral: 1)
static let titleNumberOfLines = 2
static let textColor = AppAssets.timelineTextPrimaryColor
static let textFont = UIFont.systemFont(ofSize: UIFont.systemFontSize)
static let textOnlyFont = UIFont.systemFont(ofSize: UIFont.systemFontSize)
static let unreadCircleDimension = CGFloat(integerLiteral: 8)
static let unreadCircleMarginRight = CGFloat(integerLiteral: 8)
static let starDimension = CGFloat(integerLiteral: 13)
static let avatarSize = CGSize(width: 48.0, height: 48.0)
static let avatarMarginLeft = CGFloat(integerLiteral: 8)
static let avatarCornerRadius = CGFloat(integerLiteral: 4)
static let chevronWidth = CGFloat(integerLiteral: 28)
let width: CGFloat
let height: CGFloat
let feedNameRect: CGRect
let dateRect: CGRect
let titleRect: CGRect
let numberOfLinesForTitle: Int
let summaryRect: CGRect
let textRect: CGRect
let unreadIndicatorRect: CGRect
let starRect: CGRect
let avatarImageRect: CGRect
let paddingBottom: CGFloat
init(width: CGFloat, height: CGFloat, feedNameRect: CGRect, dateRect: CGRect, titleRect: CGRect, numberOfLinesForTitle: Int, summaryRect: CGRect, textRect: CGRect, unreadIndicatorRect: CGRect, starRect: CGRect, avatarImageRect: CGRect, paddingBottom: CGFloat) {
self.width = width - MasterTimelineCellLayout.chevronWidth
self.feedNameRect = feedNameRect
self.dateRect = dateRect
self.titleRect = titleRect
self.numberOfLinesForTitle = numberOfLinesForTitle
self.summaryRect = summaryRect
self.textRect = textRect
self.unreadIndicatorRect = unreadIndicatorRect
self.starRect = starRect
self.avatarImageRect = avatarImageRect
self.paddingBottom = paddingBottom
if height > 0.1 {
self.height = height
} else {
self.height = [feedNameRect, dateRect, titleRect, summaryRect, textRect, unreadIndicatorRect, avatarImageRect].maxY() + paddingBottom
}
}
init(width: CGFloat, height: CGFloat, cellData: MasterTimelineCellData, hasAvatar: Bool) {
let width = width - MasterTimelineCellLayout.chevronWidth
// If height == 0.0, then height is calculated.
let showAvatar = hasAvatar && cellData.showAvatar
var textBoxRect = MasterTimelineCellLayout.rectForTextBox(cellData, showAvatar, width)
let (titleRect, numberOfLinesForTitle) = MasterTimelineCellLayout.rectForTitle(textBoxRect, cellData)
let summaryRect = numberOfLinesForTitle > 0 ? MasterTimelineCellLayout.rectForSummary(textBoxRect, titleRect, numberOfLinesForTitle, cellData) : CGRect.zero
let textRect = numberOfLinesForTitle > 0 ? CGRect.zero : MasterTimelineCellLayout.rectForText(textBoxRect, cellData)
var lastTextRect = titleRect
if numberOfLinesForTitle == 0 {
lastTextRect = textRect
} else if numberOfLinesForTitle == 1 {
if summaryRect.height > 0.1 {
lastTextRect = summaryRect
}
}
let dateRect = MasterTimelineCellLayout.rectForDate(textBoxRect, lastTextRect, cellData)
let feedNameRect = MasterTimelineCellLayout.rectForFeedName(textBoxRect, dateRect, cellData)
textBoxRect.size.height = ceil([titleRect, summaryRect, textRect, dateRect, feedNameRect].maxY() - textBoxRect.origin.y)
let avatarImageRect = MasterTimelineCellLayout.rectForAvatar(cellData, showAvatar, textBoxRect, width, height)
let unreadIndicatorRect = MasterTimelineCellLayout.rectForUnreadIndicator(textBoxRect)
let starRect = MasterTimelineCellLayout.rectForStar(unreadIndicatorRect)
let paddingBottom = MasterTimelineCellLayout.cellPadding.bottom
self.init(width: width, height: height, feedNameRect: feedNameRect, dateRect: dateRect, titleRect: titleRect, numberOfLinesForTitle: numberOfLinesForTitle, summaryRect: summaryRect, textRect: textRect, unreadIndicatorRect: unreadIndicatorRect, starRect: starRect, avatarImageRect: avatarImageRect, paddingBottom: paddingBottom)
}
static func height(for width: CGFloat, cellData: MasterTimelineCellData) -> CGFloat {
let layout = MasterTimelineCellLayout(width: width, height: 0.0, cellData: cellData, hasAvatar: true)
return layout.height
}
}
// MARK: - Calculate Rects
private extension MasterTimelineCellLayout {
static func rectForTextBox(_ cellData: MasterTimelineCellData, _ showAvatar: Bool, _ width: CGFloat) -> CGRect {
// Returned height is a placeholder. Not needed when this is calculated.
let textBoxOriginX = MasterTimelineCellLayout.cellPadding.left + MasterTimelineCellLayout.unreadCircleDimension + MasterTimelineCellLayout.unreadCircleMarginRight
let textBoxMaxX = floor((width - MasterTimelineCellLayout.cellPadding.right) - (showAvatar ? MasterTimelineCellLayout.avatarSize.width + MasterTimelineCellLayout.avatarMarginLeft : 0.0))
let textBoxWidth = floor(textBoxMaxX - textBoxOriginX)
let textBoxRect = CGRect(x: textBoxOriginX, y: MasterTimelineCellLayout.cellPadding.top, width: textBoxWidth, height: 1000000)
return textBoxRect
}
static func rectForTitle(_ textBoxRect: CGRect, _ cellData: MasterTimelineCellData) -> (CGRect, Int) {
var r = textBoxRect
if cellData.title.isEmpty {
r.size.height = 0
return (r, 0)
}
let sizeInfo = MultilineUILabelSizer.size(for: cellData.title, font: MasterTimelineCellLayout.titleFont, numberOfLines: MasterTimelineCellLayout.titleNumberOfLines, width: Int(textBoxRect.width))
r.size.height = sizeInfo.size.height
if sizeInfo.numberOfLinesUsed < 1 {
r.size.height = 0
}
return (r, sizeInfo.numberOfLinesUsed)
}
static func rectForSummary(_ textBoxRect: CGRect, _ titleRect: CGRect, _ titleNumberOfLines: Int, _ cellData: MasterTimelineCellData) -> CGRect {
if titleNumberOfLines >= MasterTimelineCellLayout.titleNumberOfLines || cellData.text.isEmpty {
return CGRect.zero
}
return rectOfLineBelow(titleRect, titleRect, 0, cellData.text, MasterTimelineCellLayout.textFont)
}
static func rectForText(_ textBoxRect: CGRect, _ cellData: MasterTimelineCellData) -> CGRect {
var r = textBoxRect
if cellData.text.isEmpty {
r.size.height = 0
return r
}
let sizeInfo = MultilineUILabelSizer.size(for: cellData.text, font: MasterTimelineCellLayout.textOnlyFont, numberOfLines: MasterTimelineCellLayout.titleNumberOfLines, width: Int(textBoxRect.width))
r.size.height = sizeInfo.size.height
if sizeInfo.numberOfLinesUsed < 1 {
r.size.height = 0
}
return r
}
static func rectForDate(_ textBoxRect: CGRect, _ rectAbove: CGRect, _ cellData: MasterTimelineCellData) -> CGRect {
return rectOfLineBelow(textBoxRect, rectAbove, MasterTimelineCellLayout.titleBottomMargin, cellData.dateString, MasterTimelineCellLayout.dateFont)
}
static func rectForFeedName(_ textBoxRect: CGRect, _ dateRect: CGRect, _ cellData: MasterTimelineCellData) -> CGRect {
if !cellData.showFeedName {
return CGRect.zero
}
return rectOfLineBelow(textBoxRect, dateRect, MasterTimelineCellLayout.dateMarginBottom, cellData.feedName, MasterTimelineCellLayout.feedNameFont)
}
static func rectOfLineBelow(_ textBoxRect: CGRect, _ rectAbove: CGRect, _ topMargin: CGFloat, _ value: String, _ font: UIFont) -> CGRect {
let textFieldSize = SingleLineUILabelSizer.size(for: value, font: font)
var r = CGRect.zero
r.size = textFieldSize
r.origin.y = rectAbove.maxY + topMargin
r.origin.x = textBoxRect.origin.x
var width = textFieldSize.width
width = min(width, textBoxRect.size.width)
width = max(width, 0.0)
r.size.width = width
return r
}
static func rectForUnreadIndicator(_ titleRect: CGRect) -> CGRect {
var r = CGRect.zero
r.size = CGSize(width: MasterTimelineCellLayout.unreadCircleDimension, height: MasterTimelineCellLayout.unreadCircleDimension)
r.origin.x = MasterTimelineCellLayout.cellPadding.left
r.origin.y = titleRect.minY + 6
return r
}
static func rectForStar(_ unreadIndicatorRect: CGRect) -> CGRect {
var r = CGRect.zero
r.size.width = MasterTimelineCellLayout.starDimension
r.size.height = MasterTimelineCellLayout.starDimension
r.origin.x = floor(unreadIndicatorRect.origin.x - ((MasterTimelineCellLayout.starDimension - MasterTimelineCellLayout.unreadCircleDimension) / 2.0))
r.origin.y = unreadIndicatorRect.origin.y - 4.0
return r
}
static func rectForAvatar(_ cellData: MasterTimelineCellData, _ showAvatar: Bool, _ textBoxRect: CGRect, _ width: CGFloat, _ height: CGFloat) -> CGRect {
var r = CGRect.zero
if !showAvatar {
return r
}
r.size = MasterTimelineCellLayout.avatarSize
r.origin.x = (width - MasterTimelineCellLayout.cellPadding.right) - r.size.width
r.origin.y = textBoxRect.origin.y + 4.0
return r
}
}
private extension Array where Element == CGRect {
func maxY() -> CGFloat {
var y: CGFloat = 0.0
self.forEach { y = Swift.max(y, $0.maxY) }
return y
}
}