CatHood0
10 months ago
parent
fbf6389ee4
commit
bbdc68cd26
4 changed files with 163 additions and 49 deletions
@ -0,0 +1,105 @@ |
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// ignore_for_file: implementation_imports |
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|
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import 'package:html2md/html2md.dart' as hmd; |
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import 'package:markdown/markdown.dart' as md; |
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import 'package:markdown/src/ast.dart' as ast; |
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import 'package:markdown/src/util.dart' as util; |
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import 'package:meta/meta.dart'; |
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|
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///Local syntax implementation for underline |
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class UnderlineSyntax extends md.DelimiterSyntax { |
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UnderlineSyntax() |
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: super( |
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'<und>', |
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requiresDelimiterRun: true, |
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allowIntraWord: true, |
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tags: [md.DelimiterTag('u', 5)], |
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); |
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} |
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|
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// [ character |
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const int $lbracket = 0x5B; |
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final RegExp youtubeVideoUrlValidator = RegExp( |
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r'^(?:https?:)?(?:\/\/)?(?:youtu\.be\/|(?:www\.|m\.)?youtube\.com\/(?:watch|v|embed)(?:\.php)?(?:\?.*v=|\/))([a-zA-Z0-9\_-]{7,15})(?:[\?&][a-zA-Z0-9\_-]+=[a-zA-Z0-9\_-]+)*(?:[&\/\#].*)?$'); |
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|
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class VideoSyntax extends md.LinkSyntax { |
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VideoSyntax({super.linkResolver}) |
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: super( |
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pattern: r'\[', |
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startCharacter: $lbracket, |
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); |
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@override |
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ast.Element createNode( |
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String destination, |
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String? title, { |
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required List<ast.Node> Function() getChildren, |
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}) { |
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final element = md.Element.empty('video'); |
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element.attributes['src'] = util.normalizeLinkDestination( |
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util.escapePunctuation(destination), |
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); |
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if (title != null && title.isNotEmpty) { |
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element.attributes['title'] = util.normalizeLinkTitle(title); |
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} |
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return element; |
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} |
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} |
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|
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class Html2MdRules { |
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const Html2MdRules._(); |
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|
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///This rule avoid the default converter from html2md ignore underline tag for <u> or <ins> |
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static final underlineRule = hmd.Rule('underline', filters: ['u', 'ins'], |
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replacement: (content, node) { |
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//Is used a local underline implemenation since markdown just use underline with html tags |
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return '<und>$content<und>'; |
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}); |
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static final videoRule = |
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hmd.Rule('video', filters: ['iframe'], replacement: (content, node) { |
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//by now, we can only access to src |
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final src = node.getAttribute('src'); |
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//if the source is null or is not valid youtube url, then just return the html instead remove it |
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//by now is only available validation for youtube videos |
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if (src == null || !youtubeVideoUrlValidator.hasMatch(src)) { |
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return node.outerHTML; |
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} |
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final title = node.getAttribute('title'); |
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return '[$title]($src)'; |
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}); |
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} |
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@experimental |
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class Html2MdConfigs { |
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const Html2MdConfigs({ |
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this.customRules, |
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this.ignoreIf, |
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this.rootTag, |
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this.imageBaseUrl, |
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this.styleOptions, |
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}); |
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/// The [rules] parameter can be used to customize element processing. |
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final List<hmd.Rule>? customRules; |
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/// Elements list in [ignore] would be ingored. |
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final List<String>? ignoreIf; |
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final String? rootTag; |
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final String? imageBaseUrl; |
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/// The default and available style options: |
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/// |
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/// | Name | Default | Options | |
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/// | ------------- |:-------------:| -----:| |
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/// | headingStyle | "setext" | "setext", "atx" | |
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/// | hr | "* * *" | "* * *", "- - -", "_ _ _" | |
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/// | bulletListMarker | "*" | "*", "-", "_" | |
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/// | codeBlockStyle | "indented" | "indented", "fenced" | |
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/// | fence | "\`\`\`" | "\`\`\`", "~~~" | |
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/// | emDelimiter | "_" | "_", "*" | |
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/// | strongDelimiter | "**" | "**", "__" | |
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/// | linkStyle | "inlined" | "inlined", "referenced" | |
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/// | linkReferenceStyle | "full" | "full", "collapsed", "shortcut" | |
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final Map<String, String>? styleOptions; |
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} |
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