forked from shadowfacts/Tusker
parent
3ba1a00257
commit
0948371f83
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@ -37,7 +37,12 @@ struct HTMLConverter {
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mutAttrString.trimTrailingCharactersInSet(.whitespacesAndNewlines)
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mutAttrString.collapseWhitespace()
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mutAttrString.addAttribute(.paragraphStyle, value: paragraphStyle, range: mutAttrString.fullRange)
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// Wait until the end and then fill in the unset paragraph styles, to avoid clobbering the list style.
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mutAttrString.enumerateAttribute(.paragraphStyle, in: mutAttrString.fullRange, options: .longestEffectiveRangeNotRequired) { value, range, stop in
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if value == nil {
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mutAttrString.addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
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}
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}
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return mutAttrString
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} else {
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@ -56,6 +61,10 @@ struct HTMLConverter {
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}
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return NSAttributedString(string: text, attributes: [.font: font, .foregroundColor: color])
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case let node as Element:
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if node.tagName() == "ol" || node.tagName() == "ul" {
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return attributedTextForList(node, usePreformattedText: usePreformattedText)
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}
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let attributed = NSMutableAttributedString(string: "", attributes: [.font: font, .foregroundColor: color])
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for child in node.getChildNodes() {
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var appendEllipsis = false
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@ -115,25 +124,6 @@ struct HTMLConverter {
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case "pre":
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attributed.append(NSAttributedString(string: "\n\n"))
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attributed.addAttribute(.font, value: monospaceFont, range: attributed.fullRange)
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case "ol", "ul":
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attributed.append(NSAttributedString(string: "\n\n"))
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attributed.trimLeadingCharactersInSet(.whitespacesAndNewlines)
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case "li":
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let parentEl = node.parent()!
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let parentTag = parentEl.tagName()
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let bullet: NSAttributedString
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if parentTag == "ol" {
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let index = (try? node.elementSiblingIndex()) ?? 0
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// we use the monospace digit font so that the periods of all the list items line up
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// TODO: this probably breaks with dynamic type
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bullet = NSAttributedString(string: "\(index + 1).\t", attributes: [.font: monospaceFont, .foregroundColor: color])
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} else if parentTag == "ul" {
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bullet = NSAttributedString(string: "\u{2022}\t", attributes: [.font: font, .foregroundColor: color])
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} else {
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bullet = NSAttributedString()
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}
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attributed.insert(bullet, at: 0)
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attributed.append(NSAttributedString(string: "\n", attributes: [.font: font]))
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default:
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break
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}
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@ -144,5 +134,37 @@ struct HTMLConverter {
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}
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}
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private func attributedTextForList(_ element: Element, usePreformattedText: Bool) -> NSAttributedString {
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let list = element.tagName() == "ol" ? OrderedNumberTextList(markerFormat: .decimal, options: 0) : NSTextList(markerFormat: .disc, options: 0)
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let paragraphStyle = paragraphStyle.mutableCopy() as! NSMutableParagraphStyle
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// I don't like that I can't just use paragraphStyle.textLists, because it makes the list markers
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// not use the monospace digit font (it seems to just use whatever font attribute is set for the whole thing),
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// and it doesn't right align the list markers.
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// Unfortunately, doing it manually means the list markers are incldued in the selectable text.
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paragraphStyle.headIndent = 32
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paragraphStyle.firstLineHeadIndent = 0
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// Use 2 tab stops, one for the list marker, the second for the content.
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paragraphStyle.tabStops = [NSTextTab(textAlignment: .right, location: 28), NSTextTab(textAlignment: .natural, location: 32)]
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let str = NSMutableAttributedString(string: "")
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var item = 1
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for child in element.children() where child.tagName() == "li" {
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if let childStr = attributedTextForHTMLNode(child, usePreformattedText: usePreformattedText) {
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str.append(NSAttributedString(string: "\t\(list.marker(forItemNumber: item))\t", attributes: [
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.font: UIFontMetrics(forTextStyle: .body).scaledFont(for: .monospacedDigitSystemFont(ofSize: 17, weight: .regular)),
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]))
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str.append(childStr)
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str.append(NSAttributedString(string: "\n"))
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item += 1
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}
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}
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str.addAttribute(.paragraphStyle, value: paragraphStyle, range: str.fullRange)
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return str
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}
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}
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private class OrderedNumberTextList: NSTextList {
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override func marker(forItemNumber itemNumber: Int) -> String {
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"\(super.marker(forItemNumber: itemNumber))."
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}
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}
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