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HTMLパースめっちゃ早くなった〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜 今夜は祭りじゃ
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117
iMast/SharedSources/Extensions/String+parseText2HTML.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| // | ||
| // String+parseText2HTML.swift | ||
| // iMast | ||
| // | ||
| // Created by user on 2018/09/20. | ||
| // Copyright © 2018年 rinsuki. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import Fuzi | ||
|
|
||
| extension String { | ||
| func parseText2HTMLNew() -> NSAttributedString? { | ||
| do { | ||
| let document = try Fuzi.HTMLDocument(string: self) | ||
| guard let root = document.root?.children(staticTag: "body").first else { | ||
| print("empty root") | ||
| return NSAttributedString(string: "") | ||
| } | ||
|
|
||
| let fetchNodeTypes: [Fuzi.XMLNodeType] = [ | ||
| .Text, | ||
| .Element | ||
| ] | ||
|
|
||
| func generateAttrStr(nodes: [XMLNode]) -> NSMutableAttributedString { | ||
| let attrStr = NSMutableAttributedString(string: "") | ||
| for node in nodes { | ||
| switch(node.type) { | ||
| case .Text: | ||
| attrStr.append(NSAttributedString(string: node.stringValue)) | ||
| case .Element: | ||
| if let element = node.toElement() { | ||
| var childAttrStr = generateAttrStr(nodes: element.childNodes(ofTypes: fetchNodeTypes)) | ||
| if let tagName = element.tag?.lowercased() { | ||
| switch tagName { | ||
| case "br": | ||
| childAttrStr.append(NSAttributedString(string: "\n")) | ||
| case "p": | ||
| childAttrStr.append(NSAttributedString(string: "\n\n")) | ||
| case "a": | ||
| if let href = element.attributes["href"] { | ||
| childAttrStr.addAttributes([ | ||
| .link: href, | ||
| .underlineStyle: NSUnderlineStyle.styleSingle.rawValue, | ||
| ], range: NSRange(location: 0, length: childAttrStr.length)) | ||
| } | ||
| case "img": | ||
| if let src = element.attributes["src"], let srcUrl = URL(string: src), | ||
| let srcData = try? Data(contentsOf: srcUrl) { | ||
| let attachment = NSTextAttachment() | ||
| attachment.image = UIImage(data: srcData) | ||
| attachment.bounds = CGRect(x: 0, y: 0, width: 15, height: 15) | ||
| childAttrStr = NSMutableAttributedString(attachment: attachment) | ||
| } | ||
| default: | ||
| break | ||
| } | ||
| } | ||
| attrStr.append(childAttrStr) | ||
| } | ||
| default: | ||
| print("unknown node.type", node.type) | ||
| } | ||
| } | ||
| return attrStr | ||
| } | ||
|
|
||
| let attrStr = generateAttrStr(nodes: root.childNodes(ofTypes: fetchNodeTypes)) | ||
| var count = 0 | ||
| for char in attrStr.string.reversed() { | ||
| if char == "\n" { | ||
| count += 1 | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
| attrStr.deleteCharacters(in: NSRange(location: attrStr.length - count, length: count)) | ||
| return attrStr | ||
| } catch let error { | ||
| print("failed to parse in new parser", error) | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| func parseText2HTML() -> NSAttributedString? { | ||
| if Defaults[.newHtmlParser], let newParserResult = self.parseText2HTMLNew() { | ||
| return newParserResult | ||
| } | ||
| if !self.replace("<p>","").replace("</p>","").contains("<") { | ||
| return nil | ||
| } | ||
| if html2ascacheavail[self] ?? false { | ||
| return html2ascache[self] ?? nil | ||
| } | ||
|
|
||
| // 受け取ったデータをUTF-8エンコードする | ||
| let encodeData = self.data(using: String.Encoding.utf8, allowLossyConversion: true) | ||
|
|
||
| // 表示データのオプションを設定する | ||
| let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [ | ||
| NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html, | ||
| NSAttributedString.DocumentReadingOptionKey.characterEncoding: String.Encoding.utf8.rawValue | ||
| ] | ||
|
|
||
| // 文字列の変換処理 | ||
| var attributedString:NSAttributedString? | ||
| attributedString = try? NSAttributedString( | ||
| data: encodeData!, | ||
| options: attributedOptions, | ||
| documentAttributes: nil | ||
| ) | ||
| html2ascache[self] = attributedString | ||
|
|
||
| return attributedString | ||
| } | ||
| } |
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