221 lines
8.9 KiB
Swift
221 lines
8.9 KiB
Swift
//
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// Copyright (c) 2023 Touch Instinct
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//
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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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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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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
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// THE SOFTWARE.
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//
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import TISwiftUtils
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import TIUIKitCore
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import UIKit
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open class TextSkeletonsConfiguration: BaseViewSkeletonsConfiguration {
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open class Defaults: BaseViewSkeletonsConfiguration.Defaults {
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public class var numberOfLines: Int {
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1
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}
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public class var multilineNumberOfLines: Int {
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3
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}
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public class var linesWidthFraction: [CGFloat] {
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[1, 0.65, 0.78]
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}
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public class var defaultFont: UIFont {
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.systemFont(ofSize: 15)
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}
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}
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public var numberOfLines: Int?
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public var linesWidthFraction: [CGFloat]
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public var lineHeight: CGFloat?
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public var lineSpacing: CGFloat?
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public init(numberOfLines: Int? = nil,
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linesWidthFraction: [CGFloat] = Defaults.linesWidthFraction,
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lineHeight: CGFloat? = nil,
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lineSpacing: CGFloat? = nil,
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padding: UIEdgeInsets = .edges(5),
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maxWidth: CGFloat = .infinity,
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shape: Shape = .rectangle(cornerRadius: Defaults.cornerRadius),
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animatable: Bool = Defaults.animatable) {
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self.numberOfLines = numberOfLines
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self.linesWidthFraction = linesWidthFraction
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self.lineHeight = lineHeight
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self.lineSpacing = lineSpacing
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super.init(padding: padding, shape: shape, animatable: animatable)
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}
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open func createConfiguration(for label: UILabel) -> TextSkeletonsConfiguration {
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let labelFont = getFont(from: label)
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return copyWith(numberOfLines: getLinesCount(viewNumberOfLines: label.numberOfLines),
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lineHeight: calculateLineHeight(for: labelFont),
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lineSpacing: calculateLineSpacing(for: labelFont),
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padding: padding,
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maxWidth: maxWidth,
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shape: shape,
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animatable: animatable)
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}
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open func createConfiguration(for textView: UITextView) -> TextSkeletonsConfiguration {
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let labelFont = getFont(from: textView)
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return copyWith(numberOfLines: getLinesCount(viewNumberOfLines: textView.textContainer.maximumNumberOfLines),
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lineHeight: calculateLineHeight(for: labelFont),
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lineSpacing: calculateLineSpacing(for: labelFont),
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padding: padding,
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maxWidth: maxWidth,
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shape: shape,
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animatable: animatable)
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}
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open override func createPath(for rect: CGRect) -> CGPath {
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/*
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SkeletonLayer
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|-------------------------|
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||-----------------------|| - first line CGRect(0, 0, rect.width, lineHeight)
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| | - spacing
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||-----------------------|| - second line CGRect(0, lineHeight + spacing, rect.width, lineHeight)
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| | - spacing
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||-----------------------|| - third line CGRect(0, (lineHeight + spacing) * 2, rect.width, lineHeight)
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|-------------------------|
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*/
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let adjustedRect = rect.reduceSize(byPadding: padding).with(maxWidth: maxWidth)
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let path = UIBezierPath()
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let spacing = lineSpacing ?? calculateLineSpacing(for: Defaults.defaultFont)
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let lineHeight = self.lineHeight ?? calculateLineHeight(for: Defaults.defaultFont)
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var cornerRadius = CGFloat.zero
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if case let .rectangle(cornerRadius: radius) = shape {
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cornerRadius = radius / 2
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}
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for lineNumber in 0..<(numberOfLines ?? Defaults.numberOfLines) {
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let adjustedLineRect: CGRect
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if linesWidthFraction.isEmpty {
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adjustedLineRect = adjustedRect
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} else {
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let currentLineWidthFracion = linesWidthFraction[lineNumber % linesWidthFraction.count]
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let currentLineWidth = adjustedRect.width * currentLineWidthFracion
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adjustedLineRect = adjustedRect.with(maxWidth: currentLineWidth)
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}
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let y = (lineHeight + spacing) * CGFloat(lineNumber)
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path.move(to: CGPoint(x: cornerRadius, y: y))
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path.addLine(to: CGPoint(x: adjustedLineRect.width - cornerRadius, y: y))
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path.addQuadCurve(to: CGPoint(x: adjustedLineRect.width, y: y + cornerRadius),
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controlPoint: CGPoint(x: adjustedLineRect.width, y: y))
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path.addLine(to: CGPoint(x: adjustedLineRect.width, y: y + lineHeight - cornerRadius))
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path.addQuadCurve(to: CGPoint(x: adjustedLineRect.width - cornerRadius, y: y + lineHeight),
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controlPoint: CGPoint(x: adjustedLineRect.width, y: y + lineHeight))
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path.addLine(to: CGPoint(x: cornerRadius, y: y + lineHeight))
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path.addQuadCurve(to: CGPoint(x: .zero, y: y + lineHeight - cornerRadius),
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controlPoint: CGPoint(x: .zero, y: y + lineHeight))
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path.addLine(to: CGPoint(x: .zero, y: y + cornerRadius))
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path.addQuadCurve(to: CGPoint(x: cornerRadius, y: y),
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controlPoint: CGPoint(x: .zero, y: y))
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}
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return path.cgPath
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}
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open func getFont(from textView: UITextView) -> UIFont {
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guard let attributedText = textView.attributedText else {
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return textView.font ?? Defaults.defaultFont
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}
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return getBiggestFont(from: attributedText)
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}
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open func getFont(from label: UILabel) -> UIFont {
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guard let attributedText = label.attributedText else {
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return label.font
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}
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return getBiggestFont(from: attributedText)
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}
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open func getBiggestFont(from attributedString: NSAttributedString) -> UIFont {
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let text = attributedString.string
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var biggestFont: UIFont = .systemFont(ofSize: 1)
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attributedString.enumerateAttributes(in: NSRange(text.startIndex..., in: text)) { attributes, _, _ in
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guard let fontValue = attributes[.font] as? UIFont else {
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return
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}
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if fontValue.lineHeight > biggestFont.lineHeight {
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biggestFont = fontValue
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}
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}
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return biggestFont
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}
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open func calculateLineHeight(for font: UIFont) -> CGFloat {
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// By default height of the line is equal to 75% of font's size
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font.pointSize * 0.75
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}
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open func calculateLineSpacing(for font: UIFont) -> CGFloat {
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font.xHeight
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}
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open func copyWith(numberOfLines: Int? = nil,
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linesWidthFraction: [CGFloat]? = nil,
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lineHeight: CGFloat? = nil,
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lineSpacing: CGFloat? = nil,
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padding: UIEdgeInsets? = nil,
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maxWidth: CGFloat? = nil,
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shape: Shape? = nil,
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animatable: Bool? = nil) -> TextSkeletonsConfiguration {
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TextSkeletonsConfiguration(numberOfLines: numberOfLines ?? self.numberOfLines,
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linesWidthFraction: linesWidthFraction ?? self.linesWidthFraction,
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lineHeight: lineHeight ?? self.lineHeight,
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lineSpacing: lineSpacing ?? self.lineSpacing,
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padding: padding ?? self.padding,
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maxWidth: maxWidth ?? self.maxWidth,
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shape: shape ?? self.shape,
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animatable: animatable ?? self.animatable)
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}
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private func getLinesCount(viewNumberOfLines: Int) -> Int {
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if let numberOfLines {
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return numberOfLines
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} else {
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return viewNumberOfLines == 0
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? Defaults.multilineNumberOfLines
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: viewNumberOfLines
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}
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}
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}
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