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Support Links and inline code styles
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Markdowner/Classes/Default Elements/InlineCodeElement.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // | ||
| // InlineCodeElement.swift | ||
| // Markdowner | ||
| // | ||
| // Created by Reynaldo Aguilar on 7/26/18. | ||
| // | ||
|
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| import Foundation | ||
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| open class InlineCodeElement: MarkdownElement { | ||
| let symbolsColor: UIColor | ||
| let font: UIFont | ||
|
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| public init(symbolsColor: UIColor, font: UIFont) { | ||
| self.symbolsColor = symbolsColor | ||
| self.font = font | ||
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| let pattern = "(?<!`)`(?![ `]).*?(?<![ `])`(?!`)" | ||
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| guard let regex = try? NSRegularExpression(pattern: pattern, options: []) else { | ||
| fatalError() | ||
| } | ||
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| super.init(regex: regex) | ||
| } | ||
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| open override func styles(forMatch match: String) -> [MarkdownElement.Style] { | ||
| let fontStyle = Style( | ||
| attributeKey: .font, | ||
| value: font.dynamic(), | ||
| startIndex: 0, | ||
| length: match.count | ||
| ) | ||
|
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| let indicatorRanges = [ | ||
| NSRange(location: 0, length: 1), | ||
| NSRange(location: match.count - 1, length: 1) | ||
| ] | ||
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| let foregroundStyles = indicatorRanges.map { | ||
| Style( | ||
| attributeKey: .foregroundColor, | ||
| value: symbolsColor, | ||
| startIndex: $0.location, | ||
| length: $0.length | ||
| ) | ||
| } | ||
|
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| return foregroundStyles + [fontStyle] | ||
| } | ||
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| open override func applying(stylesConfiguration: StylesConfiguration) -> InlineCodeElement { | ||
| return InlineCodeElement( | ||
| symbolsColor: stylesConfiguration.symbolsColor, | ||
| font: font | ||
| ) | ||
| } | ||
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| open override func replacementRanges(forMatch match: String) -> [ReplacementRange] { | ||
| let ranges = [NSRange(location: 0, length: 1), NSRange(location: match.count - 1, length: 1)] | ||
| return ranges.map { ReplacementRange(range: $0, replacementValue: NSAttributedString()) } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // | ||
| // LinkElement.swift | ||
| // Markdowner | ||
| // | ||
| // Created by Reynaldo Aguilar on 7/24/18. | ||
| // | ||
|
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| import Foundation | ||
|
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| open class LinkElement: MarkdownElement { | ||
| let symbolsColor: UIColor | ||
| let textFont: UIFont | ||
| let linksColor: UIColor | ||
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| init(symbolsColor: UIColor, font: UIFont, linksColor: UIColor) { | ||
| self.symbolsColor = symbolsColor | ||
| self.textFont = font | ||
| self.linksColor = linksColor | ||
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| // the url regex was taken from: https://stackoverflow.com/a/3809435/3385517 | ||
| // specifically from the link http://regexr.com/3e6m0 inside that question | ||
| let urlRegexPattern = "(http(s)?:\\/\\/.)?(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{2,256}\\.[a-z]{2,6}\\b([-a-zA-Z0-9@:%_\\+.~#?&//=]*)" | ||
|
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| let linkPattern = "(?<!\\[)(\\[).+(\\])(\\()\(urlRegexPattern)(\\))(?!\\))" | ||
|
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| guard let regex = try? NSRegularExpression(pattern: linkPattern, options: []) else { | ||
| fatalError() | ||
| } | ||
|
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| super.init(regex: regex) | ||
| } | ||
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| open override func styles(forMatch match: String) -> [MarkdownElement.Style] { | ||
| let ranges = symbolRanges(forMatch: match) | ||
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| let symbolsColor = ranges.map { range in | ||
| Style( | ||
| attributeKey: .foregroundColor, | ||
| value: self.symbolsColor, | ||
| startIndex: range.location, | ||
| length: range.length | ||
| ) | ||
| } | ||
|
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| let textRange = NSRange( | ||
| location: ranges[0].location + 1, | ||
| length: ranges[1].location - ranges[0].location | ||
| ) | ||
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| let urlRange = NSRange( | ||
| location: ranges[2].location + 1, | ||
| length: ranges[3].location - ranges[2].location | ||
| ) | ||
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| let textStyles = [ | ||
| MarkdownElement.Style( | ||
| attributeKey: .link, | ||
| value: (match as NSString).substring(with: urlRange), | ||
| startIndex: textRange.location, | ||
| length: textRange.length | ||
| ), | ||
| MarkdownElement.Style( | ||
| attributeKey: .foregroundColor, | ||
| value: linksColor, | ||
| startIndex: textRange.location, | ||
| length: textRange.length | ||
| ) | ||
| ] | ||
|
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| return symbolsColor + textStyles | ||
| } | ||
|
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| open override func replacementRanges(forMatch match: String) -> [ReplacementRange] { | ||
| let symbolRanges = self.symbolRanges(forMatch: match) | ||
|
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| let urlPortionRange = NSRange( | ||
| location: symbolRanges[2].location, | ||
| length: match.count - symbolRanges[2].location | ||
| ) | ||
|
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| return [symbolRanges[0], symbolRanges[1], urlPortionRange].map { | ||
| ReplacementRange(range: $0, replacementValue: NSAttributedString()) | ||
| } | ||
| } | ||
|
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| open override func applying(stylesConfiguration: StylesConfiguration) -> LinkElement { | ||
| return LinkElement( | ||
| symbolsColor: stylesConfiguration.symbolsColor, | ||
| font: stylesConfiguration.baseFont, | ||
| linksColor: linksColor | ||
| ) | ||
| } | ||
|
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| private func symbolRanges(forMatch match: String) -> [NSRange] { | ||
| let fullRange = NSRange(location: 0, length: match.count) | ||
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| guard let regexMatch = regex.matches(in: match, options: [], range: fullRange).first else { | ||
| fatalError("ERROR: Unable to find a match for the given ouput") | ||
| } | ||
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| let lastRange = regexMatch.range(at: regexMatch.numberOfRanges - 1) | ||
| let ranges = (1...3).map { regexMatch.range(at: $0) } + [lastRange] | ||
| return ranges | ||
| } | ||
| } |
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