368 lines
13 KiB
Ruby
368 lines
13 KiB
Ruby
require 'uri'
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require 'redcarpet'
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require 'redcarpet/render_strip'
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class FormatterMarkdown
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def initialize(html)
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@html = html.dup
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end
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def formatted
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mdRenderer = CustomMDRenderer.new(
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strikethrough: true,
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hard_wrap: true,
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autolink: false,
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superscript:false,
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fenced_link: true,
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fenced_image: true,
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no_intra_emphasis: true,
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no_links: true,
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no_styles: true,
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no_images: true,
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filter_html: true,
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escape_html: true,
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safe_links_only: true,
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with_toc_data: true,
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xhtml: false,
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prettify: true,
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link_attributes: true
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)
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md = Redcarpet::Markdown.new(
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mdRenderer,
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strikethrough: true,
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hard_wrap: true,
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superscript:false,
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autolink: false,
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space_after_headers: true,
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no_intra_emphasis: true,
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no_links: true,
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no_styles: true,
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no_images: true,
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filter_html: true,
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escape_html: true,
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safe_links_only: true,
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with_toc_data: true,
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xhtml: false,
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prettify: true,
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link_attributes: true
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)
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s = @html
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s.gsub!(/\n[\n]+/) {"\n \n"}# 改行周りの問題を修正
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s.gsub!(/`[ ]+`/) {"｀ ｀"}# code内が半角スペースのみだとHTMLが壊れるのでそれの回避
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renderedMD = md.render(s)
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result = renderedMD
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result.gsub!(/(<\w+)([^>]*>)/) { "#{$1} data-md='true' #{$2}" }# ToDo data-md="true" を認識して他鯖の人にmarkdownの使用を伝える機能の実装
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result.gsub!(/(https?:\/\/[^<>"\[\] ]+)/){"#{$1} "}#URLの後ろにスペースをねじ込む奴 mastodonのURL認識がゆるいのをmarkdownで対処
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result
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end
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class CustomMDRenderer < Redcarpet::Render::HTML
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#基本的な実装の流れ
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#URLの削除(mastodonの機能上URLとして認識されると十中八九HTMLが壊れるので)
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#markdownコンテンツ内でのmarkdownコンテンツの禁止(意図しないHTMLタグの生成によってHTMLの不正出力を防ぐ目的)
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#最後にHTMLに出力される際にHTML的にヤバイ子たちのエスケープ
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def paragraph(text)
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%(#{text.strip})
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end
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def linebreak()
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%(<br>)
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end
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def block_quote(quote)
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urlRemoved = "#{remove_url(quote)}"
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escapedContents = "#{blockquote_markdown_escape(urlRemoved)}"
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%(<blockquote>#{escapedContents.strip}</blockquote>)
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end
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def header(text, header_level)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<h#{header_level}>#{encode(mdContentsRemoved)}</h#{header_level}>\n)
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end
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def block_code(code, language)
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%(<br>#{code.strip})
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end
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def codespan(code)
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urlRemoved = "#{remove_url(code)}"
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escapedCode = "#{escape_bbcode(urlRemoved)}"
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encoded = "#{encode(escapedCode)}"
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%(<code>#{code_contents(encoded)}</code>)
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end
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def list(contents, list_type)
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if list_type == :unordered
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%(<ul class='md-contents'>#{contents.strip}</ul>)
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elsif list_type == :ordered
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%(<ol class='md-contents'>#{contents.strip}</ol>)
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else
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%(<#{list_type} class='md-contents'>#{contents.strip}</#{list_type}>)
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end
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end
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def list_item(text, list_type)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<li class='md-contents'>#{encode(mdContentsRemoved)}</li>)
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end
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def emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sup>#{encode(mdContentsRemoved)}</sup>)
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end
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def double_emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sub>#{encode(mdContentsRemoved)}</sub>)
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end
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def triple_emphasis(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<small>#{encode(mdContentsRemoved)}</small>)
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end
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def strikethrough(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<s>#{encode(mdContentsRemoved)}</s>)
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end
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def superscript(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<sup>#{encode(mdContentsRemoved)}</sup>)
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end
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def underline(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<u>#{encode(mdContentsRemoved)}</u>)
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end
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def highlight(text)
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urlRemoved = "#{remove_url(text)}"
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mdContentsRemoved = "#{markdown_escape(urlRemoved)}"
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%(<mark>#{encode(mdContentsRemoved)}</mark>)
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end
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#オートリンクはmastodonとの相性が悪いので基本的には使わない
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def autolink(link, link_type)
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%(<a herf="#{link}">リンク</a>)
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end
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#https以外の物がURLとして記入された時にTextをHTML的に考えて安全に表示するように変更
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def image(link, title, alt_text)
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if alt_text =~ /[<>"\[\] ]+/
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alt_text = "設定なし"
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end
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imgcheck = "#{link}"
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if imgcheck !~ /\Ahttps:\/\/[^<>"\[\] ]+\z/
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%(#{encode(alt_text)})
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else
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%(<span class="img_FTL">画像が添付されています。</span><img src="#{URI.encode_www_form_component(link)}">)
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end
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end
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def link(link, title, content)
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if content =~ /([<>"\[\] ]+|https?:\/\/|#|@)/
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content = "リンク"
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elsif content !~ /.+/
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content = "リンク"
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end
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linkcheck = "#{link}"
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if linkcheck !~ /\Ahttps:\/\/[^<>"\[\] ]+\z/
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%(#{encode(content)})
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else
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%(<a href="#{URI.encode_www_form_component(link)}">#{encode(content)}</a>)
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end
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end
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#ここから下はいろいろエスケープするための奴
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#HTML的に考えてよろしくない子たちをエスケープする奴
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def encode(html)
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HTMLEntities.new.encode(html)
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end
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#markdownコンテンツないでURLが生成されるのを防ぐためのエスケープする奴
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def remove_url(string)
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url = string.gsub(/https?:\/\//){ "URL:" }
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reply = url.gsub(/@/){ "＠" }
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hashTag = reply.gsub(/#/){ "＃" }
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end
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#前々から要望があったcode内でBBCodeを無効化するための奴
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def escape_bbcode(string)
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string.gsub(/\[/){ "[" }
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end
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#markdownの中でmarkdownを展開させないためのエスケープする奴
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#blockquote以外は下のが使える
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def markdown_escape(string)
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string.gsub(/<[^>]+>/) { "" }
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end
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#blockquoteコンテンツ内でblockquoteタグだけを許可するためのエスケープ
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def blockquote_markdown_escape(string)
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string.gsub(/<([\/]?a[^>]*|[\/]?img[^>]*|[\/]?code[^>]*|[\/]?h[1-6][^>]*|[\/]?sup[^>]*|[\/]?sub[^>]*|[\/]?small[^>]*|[\/]?ul[^>]*|[\/]?ol[^>]*|[\/]?li[^>]*|[\/]?hr[^>]*|[\/]?s[^>]*|[\/]?u[^>]*|[\/]?mark[^>]*)>/) { "" }
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end
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#code内の一部を色分けするための変更
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def code_contents(string)
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simple = string.gsub(/(true|error|false|failed|def|puts|end|fn|let|mut|use|String|println!)/ ,
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"true" => "<span class='positive'>#{:true}</span>",
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"error" => "<span class='negative'>#{:error}</span>",
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"false" => "<span class='negative'>#{:false}</span>",
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"failed" => "<span class='negative'>#{:failed}</span>",
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"def" => "<span class='ruby-func'>#{:def}</span>",
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"puts" => "<span class='ruby-func'>#{:puts}</span>",
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"end" => "<span class='ruby-func'>#{:end}</span>",
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"fn" => "<span class='rust-fanc'>#{:fn}</span>",
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"let" => "<span class='rust-fanc'>#{:let}</span>",
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"mut" => "<span class='rust-fanc'>#{:mut}</span>",
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"use" => "<span class='rust-fanc'>#{:use}</span>",
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"String" => "<span class='rust-macro'>#{:String}</span>",
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"println!" => "<span class='rust-macro'>#{:println!}</span>",
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)
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simple.gsub(/("[a-zA-Z0-9_ ,]+")/){ "<span class='contents'>#{$1}</span>" }
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# "" => "<span class=''>#{:}</span>",
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end
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#テストで書きなぐった奴
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def html_escape(string)
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string.gsub(/['&\"<>\/]/, {
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'&' => '&',
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'<' => '<',
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'>' => '>',
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'"' => '"',
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"'" => ''',
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"/" => '/',
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})
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end
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end
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end
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#URLとかいう人類には早すぎたやばい子たちを大人しくするために必要な機構
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class MDLinkDecoder
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def initialize(html)
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@html = html.dup
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end
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def decode
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imageDecoded = @html.gsub(/<img data-md='true'\s+src="([^"]+)"([^>]*)>/) { "<a href=\"" + URI.decode_www_form_component($1) + "\"" + $2 + "><img data-md='true' src=\"" + URI.decode_www_form_component($1) + "\"" + $2 + "></a>" }
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imageDecoded.gsub(/<a data-md='true'\s+href="([^"]+)"([^>]*)>/) { "<a data-md='true' href=\"" + URI.decode_www_form_component($1) + "\"" + $2 + ">" }
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end
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end
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#エスケープを回避するHTMLタグの設定とかその他
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class MDExtractor
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def initialize(html)
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@html = html.dup
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end
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def extractEntities
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[
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extractByHTMLTagName("h1"),
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extractByHTMLTagName("h2"),
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extractByHTMLTagName("h3"),
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extractByHTMLTagName("h4"),
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extractByHTMLTagName("h5"),
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extractByHTMLTagName("h6"),
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extractByHTMLTagName("em"),
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extractByHTMLTagName("sup"),
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extractByHTMLTagName("sub"),
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extractByHTMLTagName("small"),
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extractByHTMLTagName("u"),
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extractByHTMLTagName("strong"),
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extractByHTMLTagName("ul", false, false, "li"),
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extractByHTMLTagName("ol", false, false, "li"),
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extractByHTMLTagName("code"),
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extractByHTMLTagName("blockquote", false),
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extractByHTMLTagName("hr", false, true),
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extractByHTMLTagName("br", false, true),
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extractByHTMLTagName("a"),
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extractByHTMLTagName("img", false, true),
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extractByHTMLTagName("s"),
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extractByHTMLTagName("span")
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].flatten.compact
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end
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def extractByHTMLTagName(tagName, isNoNest = true, isSingle = false, itemTagName = nil)
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entities = []
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@html.to_s.scan(htmlTagPatternByCond(tagName, isNoNest, isSingle, itemTagName)) do
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match = $~
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beginPos = match.char_begin(0)
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endPos = match.char_end(0)
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#puts "MDExtractor extracted with:\n" + @html + "\nbeginPos: " + beginPos.to_s + ", endPos: " + endPos.to_s + ", length: " + @html.length.to_s
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entity = {
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:markdown => true,
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:indices => [beginPos, endPos]
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}
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entities.push(entity)
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end
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entities
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end
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def htmlTagPatternByCond(tagName, isNoNest, isSingle, itemTagName)
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if isSingle
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htmlTagPatternSingle(tagName)
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elsif isNoNest
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htmlTagPatternNoNest(tagName)
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elsif itemTagName && itemTagName.length > 0
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htmlTagPatternOuterMostWithItem(tagName, itemTagName)
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else
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htmlTagPatternOuterMost(tagName)
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end
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end
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def htmlTagPattern(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<]|<#{tagName} data-md=[^>]*>|<\\/#{tagName}>)*(?:<\\/#{tagName}>)*")
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end
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def htmlTagPatternNoNest(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:.|\n)*?<\\/#{tagName}>")
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end
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def htmlTagPatternSingle(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>")
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end
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# https://stackoverflow.com/questions/546433/regular-expression-to-match-outer-brackets
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def htmlTagPatternOuterMost(tagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<>]|(\\g<0>))*<\/#{tagName}>")
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end
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def htmlTagPatternOuterMostWithItem(tagName, itemTagName)
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Regexp.compile("<#{tagName} data-md=[^>]*>(?:[^<>]|<#{itemTagName} data-md=[^>]*>|<\\/#{itemTagName}>|(\\g<0>))*<\/#{tagName}>")
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end
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end
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