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path: root/app/helpers/gitlab/blob_helper.rb
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module Gitlab
  module BlobHelper
    def highlight(blob_name, blob_content, nowrap: false, continue: false)
      @formatter ||= Rouge::Formatters::HTMLGitlab.new(
        nowrap: nowrap,
        cssclass: 'code highlight',
        lineanchors: true,
        lineanchorsid: 'LC'
      )

      begin
        @lexer ||= Rouge::Lexer.guess(filename: blob_name, source: blob_content).new
        result = @formatter.format(@lexer.lex(blob_content, continue: continue)).html_safe
      rescue
        @lexer = Rouge::Lexers::PlainText
        result = @formatter.format(@lexer.lex(blob_content)).html_safe
      end

      result
    end

    def no_highlight_files
      %w(credits changelog news copying copyright license authors)
    end

    def edit_blob_link(project, ref, path, options = {})
      blob =
        begin
          project.repository.blob_at(ref, path)
        rescue
          nil
        end

      if blob && blob.text?
        text = 'Edit'
        after = options[:after] || ''
        from_mr = options[:from_merge_request_id]
        link_opts = {}
        link_opts[:from_merge_request_id] = from_mr if from_mr
        cls = 'btn btn-small'
        if allowed_tree_edit?(project, ref)
          link_to(text,
                  namespace_project_edit_blob_path(project.namespace, project,
                                                   tree_join(ref, path),
                                                   link_opts),
                  class: cls
                 )
        else
          content_tag :span, text, class: cls + ' disabled'
        end + after.html_safe
      else
        ''
      end
    end

    def leave_edit_message
      "Leave edit mode?\nAll unsaved changes will be lost."
    end

    def editing_preview_title(filename)
      if Gitlab::MarkupHelper.previewable?(filename)
        'Preview'
      else
        'Preview changes'
      end
    end

    # Return an image icon depending on the file mode and extension
    #
    # mode - File unix mode
    # mode - File name
    def blob_icon(mode, name)
      icon("#{file_type_icon_class('file', mode, name)} fw")
    end
  end
end