258 lines
8 KiB
Ruby
258 lines
8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'nokogiri'
|
|
|
|
module MarkupHelper
|
|
include ActionView::Helpers::TextHelper
|
|
include ActionView::Context
|
|
|
|
# Use this in places where you would normally use link_to(gfm(...), ...).
|
|
def link_to_markdown(body, url, html_options = {})
|
|
return '' if body.blank?
|
|
|
|
link_to_html(markdown(body, pipeline: :single_line), url, html_options)
|
|
end
|
|
|
|
def link_to_markdown_field(object, field, url, html_options = {})
|
|
rendered_field = markdown_field(object, field)
|
|
|
|
link_to_html(rendered_field, url, html_options)
|
|
end
|
|
|
|
# It solves a problem occurring with nested links (i.e.
|
|
# "<a>outer text <a>gfm ref</a> more outer text</a>"). This will not be
|
|
# interpreted as intended. Browsers will parse something like
|
|
# "<a>outer text </a><a>gfm ref</a> more outer text" (notice the last part is
|
|
# not linked any more). link_to_html corrects that. It wraps all parts to
|
|
# explicitly produce the correct linking behavior (i.e.
|
|
# "<a>outer text </a><a>gfm ref</a><a> more outer text</a>").
|
|
def link_to_html(redacted, url, html_options = {})
|
|
fragment = Nokogiri::HTML::DocumentFragment.parse(redacted)
|
|
|
|
if fragment.children.size == 1 && fragment.children[0].name == 'a'
|
|
# Fragment has only one node, and it's a link generated by `gfm`.
|
|
# Replace it with our requested link.
|
|
text = fragment.children[0].text
|
|
fragment.children[0].replace(link_to(text, url, html_options))
|
|
else
|
|
# Traverse the fragment's first generation of children looking for
|
|
# either pure text or emojis, wrapping anything found in the
|
|
# requested link
|
|
fragment.children.each do |node|
|
|
if node.text?
|
|
node.replace(link_to(node.text, url, html_options))
|
|
elsif node.name == 'gl-emoji'
|
|
node.replace(link_to(node.to_html.html_safe, url, html_options))
|
|
end
|
|
end
|
|
end
|
|
|
|
# Add any custom CSS classes to the GFM-generated reference links
|
|
if html_options[:class]
|
|
fragment.css('a.gfm').add_class(html_options[:class])
|
|
end
|
|
|
|
fragment.to_html.html_safe
|
|
end
|
|
|
|
# Return the first line of +text+, up to +max_chars+, after parsing the line
|
|
# as Markdown. HTML tags in the parsed output are not counted toward the
|
|
# +max_chars+ limit. If the length limit falls within a tag's contents, then
|
|
# the tag contents are truncated without removing the closing tag.
|
|
def first_line_in_markdown(object, attribute, max_chars = nil, is_todo: false, **options)
|
|
md = markdown_field(object, attribute, options.merge(post_process: false))
|
|
return unless md.present?
|
|
|
|
includes_code = false
|
|
|
|
tags = %w(a gl-emoji b strong i em pre code p span)
|
|
|
|
if is_todo
|
|
fragment = Nokogiri::HTML.fragment(md)
|
|
includes_code = fragment.css('code').any?
|
|
|
|
md = fragment
|
|
end
|
|
|
|
context = markdown_field_render_context(object, attribute, options)
|
|
context.reverse_merge!(truncate_visible_max_chars: max_chars || md.length)
|
|
|
|
text = prepare_for_rendering(md, context)
|
|
text = sanitize(
|
|
text,
|
|
tags: tags,
|
|
attributes: Rails::Html::WhiteListSanitizer.allowed_attributes +
|
|
%w(
|
|
style data-src data-name data-unicode-version data-html
|
|
data-reference-type data-project-path data-iid data-mr-title
|
|
data-user
|
|
)
|
|
)
|
|
|
|
# Extra span with relative positioning relative due to system font being behind
|
|
# background color when username is first word of mention
|
|
if is_todo && !includes_code
|
|
text = "<span class=\"gl-relative\">\"</span>#{text}<span class=\"gl-relative\">\"</span>"
|
|
end
|
|
|
|
# since <img> tags are stripped, this can leave empty <a> tags hanging around
|
|
# (as our markdown wraps images in links)
|
|
strip_empty_link_tags(text).html_safe
|
|
end
|
|
|
|
def markdown(text, context = {})
|
|
return '' unless text.present?
|
|
|
|
context[:project] ||= @project
|
|
context[:group] ||= @group
|
|
|
|
html = Markup::RenderingService.new(text, context: context, postprocess_context: postprocess_context).execute
|
|
|
|
Hamlit::RailsHelpers.preserve(html)
|
|
end
|
|
|
|
def markdown_field(object, field, context = {})
|
|
object = object.for_display if object.respond_to?(:for_display)
|
|
return '' unless object.present?
|
|
|
|
redacted_field_html = object.try(:"redacted_#{field}_html")
|
|
return redacted_field_html if redacted_field_html
|
|
|
|
render_markdown_field(object, field, context)
|
|
end
|
|
|
|
def markup(file_name, text, context = {})
|
|
context[:project] ||= @project
|
|
context[:text_source] ||= :blob
|
|
prepare_asciidoc_context(file_name, context)
|
|
|
|
html = Markup::RenderingService
|
|
.new(text, file_name: file_name, context: context, postprocess_context: postprocess_context)
|
|
.execute
|
|
|
|
Hamlit::RailsHelpers.preserve(html)
|
|
end
|
|
|
|
def render_wiki_content(wiki_page, context = {})
|
|
text = wiki_page.content
|
|
return '' unless text.present?
|
|
|
|
context = render_wiki_content_context(wiki_page.wiki, wiki_page, context)
|
|
prepare_asciidoc_context(wiki_page.path, context)
|
|
|
|
html = Markup::RenderingService
|
|
.new(text, file_name: wiki_page.path, context: context, postprocess_context: postprocess_context)
|
|
.execute
|
|
|
|
Hamlit::RailsHelpers.preserve(html)
|
|
end
|
|
|
|
# Returns the text necessary to reference `entity` across projects
|
|
#
|
|
# project - Project to reference
|
|
# entity - Object that responds to `to_reference`
|
|
#
|
|
# Examples:
|
|
#
|
|
# cross_project_reference(project, project.issues.first)
|
|
# # => 'namespace1/project1#123'
|
|
#
|
|
# cross_project_reference(project, project.merge_requests.first)
|
|
# # => 'namespace1/project1!345'
|
|
#
|
|
# Returns a String
|
|
def cross_project_reference(project, entity)
|
|
if entity.respond_to?(:to_reference)
|
|
entity.to_reference(project, full: true)
|
|
else
|
|
''
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def render_wiki_content_context(wiki, wiki_page, context)
|
|
context.merge(
|
|
pipeline: :wiki,
|
|
wiki: wiki,
|
|
repository: wiki.repository,
|
|
page_slug: wiki_page.slug,
|
|
issuable_reference_expansion_enabled: true,
|
|
requested_path: wiki_page.path
|
|
).merge(render_wiki_content_context_container(wiki))
|
|
end
|
|
|
|
def render_wiki_content_context_container(wiki)
|
|
{ project: wiki.container }
|
|
end
|
|
|
|
def strip_empty_link_tags(text)
|
|
scrubber = Loofah::Scrubber.new do |node|
|
|
node.remove if node.name == 'a' && node.children.empty?
|
|
end
|
|
|
|
sanitize text, scrubber: scrubber
|
|
end
|
|
|
|
def markdown_toolbar_button(options = {})
|
|
data = options[:data].merge({ container: 'body' })
|
|
css_classes = %w[gl-button btn btn-default-tertiary btn-icon js-md has-tooltip] << options[:css_class].to_s
|
|
content_tag :button,
|
|
type: 'button',
|
|
class: css_classes.join(' '),
|
|
data: data,
|
|
title: options[:title],
|
|
aria: { label: options[:title] } do
|
|
sprite_icon(options[:icon])
|
|
end
|
|
end
|
|
|
|
def render_markdown_field(object, field, context = {})
|
|
post_process = context.delete(:post_process)
|
|
post_process = true if post_process.nil?
|
|
|
|
html = Banzai.render_field(object, field, context)
|
|
|
|
return html unless post_process
|
|
|
|
prepare_for_rendering(html, markdown_field_render_context(object, field, context))
|
|
end
|
|
|
|
def markdown_field_render_context(object, field, base_context = {})
|
|
return base_context unless object.respond_to?(:banzai_render_context)
|
|
|
|
base_context.reverse_merge(object.banzai_render_context(field))
|
|
end
|
|
|
|
def prepare_for_rendering(html, context = {})
|
|
return '' unless html.present?
|
|
|
|
context.reverse_merge!(postprocess_context)
|
|
|
|
html = Banzai.post_process(html, context)
|
|
|
|
Hamlit::RailsHelpers.preserve(html)
|
|
end
|
|
|
|
def postprocess_context
|
|
{
|
|
current_user: (current_user if defined?(current_user)),
|
|
|
|
# RepositoryLinkFilter and UploadLinkFilter
|
|
commit: @commit,
|
|
wiki: @wiki,
|
|
ref: @ref,
|
|
requested_path: @path
|
|
}
|
|
end
|
|
|
|
def prepare_asciidoc_context(file_name, context)
|
|
return unless Gitlab::MarkupHelper.asciidoc?(file_name)
|
|
|
|
context.reverse_merge!(commit: @commit, ref: @ref, requested_path: @path)
|
|
end
|
|
|
|
extend self
|
|
end
|
|
|
|
MarkupHelper.prepend_mod_with('MarkupHelper')
|