137 lines
4.1 KiB
Ruby
137 lines
4.1 KiB
Ruby
module GitlabMarkdownHelper
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include Gitlab::Markdown
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# Use this in places where you would normally use link_to(gfm(...), ...).
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#
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# It solves a problem occurring with nested links (i.e.
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# "<a>outer text <a>gfm ref</a> more outer text</a>"). This will not be
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# interpreted as intended. Browsers will parse something like
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# "<a>outer text </a><a>gfm ref</a> more outer text" (notice the last part is
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# not linked any more). link_to_gfm corrects that. It wraps all parts to
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# explicitly produce the correct linking behavior (i.e.
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# "<a>outer text </a><a>gfm ref</a><a> more outer text</a>").
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def link_to_gfm(body, url, html_options = {})
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return "" if body.blank?
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escaped_body = if body =~ /\A\<img/
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body
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else
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escape_once(body)
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end
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gfm_body = gfm(escaped_body, {}, html_options)
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gfm_body.gsub!(%r{<a.*?>.*?</a>}m) do |match|
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"</a>#{match}#{link_to("", url, html_options)[0..-5]}" # "</a>".length +1
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end
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link_to(gfm_body.html_safe, url, html_options)
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end
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def markdown(text, options={})
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unless @markdown && options == @options
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@options = options
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options.merge!(
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# Handled further down the line by Gitlab::Markdown::SanitizationFilter
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escape_html: false
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)
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# see https://github.com/vmg/redcarpet#darling-i-packed-you-a-couple-renderers-for-lunch
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rend = Redcarpet::Render::GitlabHTML.new(self, user_color_scheme_class, options)
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# see https://github.com/vmg/redcarpet#and-its-like-really-simple-to-use
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@markdown = Redcarpet::Markdown.new(rend,
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no_intra_emphasis: true,
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tables: true,
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fenced_code_blocks: true,
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strikethrough: true,
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lax_spacing: true,
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space_after_headers: true,
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superscript: true,
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footnotes: true
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)
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end
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@markdown.render(text).html_safe
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end
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# Return the first line of +text+, up to +max_chars+, after parsing the line
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# as Markdown. HTML tags in the parsed output are not counted toward the
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# +max_chars+ limit. If the length limit falls within a tag's contents, then
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# the tag contents are truncated without removing the closing tag.
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def first_line_in_markdown(text, max_chars = nil, options = {})
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md = markdown(text, options).strip
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truncate_visible(md, max_chars || md.length) if md.present?
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end
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def render_wiki_content(wiki_page)
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if wiki_page.format == :markdown
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markdown(wiki_page.content)
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else
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wiki_page.formatted_content.html_safe
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end
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end
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private
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# Return +text+, truncated to +max_chars+ characters, excluding any HTML
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# tags.
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def truncate_visible(text, max_chars)
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doc = Nokogiri::HTML.fragment(text)
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content_length = 0
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truncated = false
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doc.traverse do |node|
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if node.text? || node.content.empty?
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if truncated
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node.remove
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next
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end
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# Handle line breaks within a node
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if node.content.strip.lines.length > 1
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node.content = "#{node.content.lines.first.chomp}..."
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truncated = true
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end
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num_remaining = max_chars - content_length
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if node.content.length > num_remaining
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node.content = node.content.truncate(num_remaining)
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truncated = true
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end
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content_length += node.content.length
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end
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truncated = truncate_if_block(node, truncated)
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end
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doc.to_html
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end
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# Used by #truncate_visible. If +node+ is the first block element, and the
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# text hasn't already been truncated, then append "..." to the node contents
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# and return true. Otherwise return false.
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def truncate_if_block(node, truncated)
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if node.element? && node.description.block? && !truncated
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node.content = "#{node.content}..." if node.next_sibling
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true
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else
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truncated
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end
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end
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def cross_project_reference(project, entity)
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path = project.path_with_namespace
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if entity.kind_of?(Issue)
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[path, entity.iid].join('#')
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elsif entity.kind_of?(MergeRequest)
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[path, entity.iid].join('!')
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else
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raise 'Not supported type'
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end
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end
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end
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