111 lines
3.3 KiB
Ruby
111 lines
3.3 KiB
Ruby
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require 'html/pipeline'
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module Gitlab
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module Markdown
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# HTML filter that replaces issue references with links. References within
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# <pre>, <code>, <a>, and <style> elements are ignored. References to issues
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# that do not exist are ignored.
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#
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# This filter supports cross-project references.
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#
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# Context options:
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# :project (required) - Current project, ignored when reference is
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# cross-project.
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# :reference_class - Custom CSS class added to reference links.
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# :only_path - Generate path-only links.
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#
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class IssueReferenceFilter < HTML::Pipeline::Filter
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include CrossProjectReference
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# Public: Find `#123` issue references in text
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#
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# IssueReferenceFilter.references_in(text) do |match, issue, project_ref|
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# "<a href=...>##{issue}</a>"
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# end
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#
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# text - String text to search.
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#
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# Yields the String match, the Integer issue ID, and an optional String of
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# the external project reference.
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#
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# Returns a String replaced with the return of the block.
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def self.references_in(text)
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text.gsub(ISSUE_PATTERN) do |match|
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yield match, $~[:issue].to_i, $~[:project]
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end
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end
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# Pattern used to extract `#123` issue references from text
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#
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# This pattern supports cross-project references.
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ISSUE_PATTERN = /#{PROJECT_PATTERN}?\#(?<issue>([a-zA-Z\-]+-)?\d+)/
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# Don't look for references in text nodes that are children of these
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# elements.
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IGNORE_PARENTS = %w(pre code a style).to_set
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def call
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doc.search('text()').each do |node|
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content = node.to_html
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next if project.nil?
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next unless project.default_issues_tracker?
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next unless content.match(ISSUE_PATTERN)
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next if has_ancestor?(node, IGNORE_PARENTS)
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html = issue_link_filter(content)
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next if html == content
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node.replace(html)
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end
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doc
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end
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def validate
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needs :project
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end
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# Replace `#123` issue references in text with links to the referenced
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# issue's details page.
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#
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# text - String text to replace references in.
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#
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# Returns a String with `#123` references replaced with links. All links
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# have `gfm` and `gfm-issue` class names attached for styling.
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def issue_link_filter(text)
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self.class.references_in(text) do |match, issue, project_ref|
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project = self.project_from_ref(project_ref)
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if project.issue_exists?(issue)
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# FIXME: Ugly
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url = url_for_issue(issue, project, only_path: context[:only_path])
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title = "Issue: #{title_for_issue(issue, project)}"
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klass = "gfm gfm-issue #{context[:reference_class]}".strip
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%(<a href="#{url}"
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title="#{title}"
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class="#{klass}">#{project_ref}##{issue}</a>)
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else
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match
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end
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end
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end
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def project
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context[:project]
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end
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def url_for_issue(*args)
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IssuesHelper.url_for_issue(*args)
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end
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def title_for_issue(*args)
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IssuesHelper.title_for_issue(*args)
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end
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end
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end
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end
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