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diff_helper.rb « gitlab « helpers « app - gitlab.com/gitlab-org/gitlab-foss.git - Unnamed repository; edit this file 'description' to name the repository.
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module Gitlab
  module DiffHelper
    def allowed_diff_size
      if diff_hard_limit_enabled?
        Commit::DIFF_HARD_LIMIT_FILES
      else
        Commit::DIFF_SAFE_FILES
      end
    end

    def allowed_diff_lines
      if diff_hard_limit_enabled?
        Commit::DIFF_HARD_LIMIT_LINES
      else
        Commit::DIFF_SAFE_LINES
      end
    end

    def safe_diff_files(diffs)
      lines = 0
      safe_files = []
      diffs.first(allowed_diff_size).each do |diff|
        lines += diff.diff.lines.count
        break if lines > allowed_diff_lines
        safe_files << Gitlab::Diff::File.new(diff)
      end
      safe_files
    end

    def diff_hard_limit_enabled?
      # Enabling hard limit allows user to see more diff information
      if params[:force_show_diff].present?
        true
      else
        false
      end
    end

    def generate_line_code(file_path, line)
      Gitlab::Diff::LineCode.generate(file_path, line.new_pos, line.old_pos)
    end

    def parallel_diff(diff_file, index)
      lines = []
      skip_next = false

      # Building array of lines
      #
      # [
      # left_type, left_line_number, left_line_content, left_line_code,
      # right_line_type, right_line_number, right_line_content, right_line_code
      # ]
      #
      diff_file.diff_lines.each do |line|

        full_line = line.text
        type = line.type
        line_code = generate_line_code(diff_file.file_path, line)
        line_new = line.new_pos
        line_old = line.old_pos

        next_line = diff_file.next_line(line.index)

        if next_line
          next_line_code = generate_line_code(diff_file.file_path, next_line)
          next_type = next_line.type
          next_line = next_line.text
        end

        if type == 'match' || type.nil?
          # line in the right panel is the same as in the left one
          line = [type, line_old, full_line, line_code, type, line_new, full_line, line_code]
          lines.push(line)
        elsif type == 'old'
          if next_type == 'new'
            # Left side has text removed, right side has text added
            line = [type, line_old, full_line, line_code, next_type, line_new, next_line, next_line_code]
            lines.push(line)
            skip_next = true
          elsif next_type == 'old' || next_type.nil?
            # Left side has text removed, right side doesn't have any change
            # No next line code, no new line number, no new line text
            line = [type, line_old, full_line, line_code, next_type, nil, "&nbsp;", nil]
            lines.push(line)
          end
        elsif type == 'new'
          if skip_next
            # Change has been already included in previous line so no need to do it again
            skip_next = false
            next
          else
            # Change is only on the right side, left side has no change
            line = [nil, nil, "&nbsp;", line_code, type, line_new, full_line, line_code]
            lines.push(line)
          end
        end
      end
      lines
    end

    def unfold_bottom_class(bottom)
      (bottom) ? 'js-unfold-bottom' : ''
    end

    def unfold_class(unfold)
      (unfold) ? 'unfold js-unfold' : ''
    end

    def diff_line_content(line)
      if line.blank?
        " &nbsp;"
      else
        line
      end
    end

    def line_comments
      @line_comments ||= @line_notes.select(&:active?).group_by(&:line_code)
    end

    def organize_comments(type_left, type_right, line_code_left, line_code_right)
      comments_left = comments_right = nil

      unless type_left.nil? && type_right == 'new'
        comments_left = line_comments[line_code_left]
      end

      unless type_left.nil? && type_right.nil?
        comments_right = line_comments[line_code_right]
      end

      [comments_left, comments_right]
    end

    def inline_diff_btn
      params_copy = params.dup
      params_copy[:view] = 'inline'
      # Always use HTML to handle case where JSON diff rendered this button
      params_copy.delete(:format)

      link_to url_for(params_copy), id: "commit-diff-viewtype", class: (params[:view] != 'parallel' ? 'btn btn-sm active' : 'btn btn-sm') do
        'Inline'
      end
    end

    def parallel_diff_btn
      params_copy = params.dup
      params_copy[:view] = 'parallel'
      # Always use HTML to handle case where JSON diff rendered this button
      params_copy.delete(:format)

      link_to url_for(params_copy), id: "commit-diff-viewtype", class: (params[:view] == 'parallel' ? 'btn active btn-sm' : 'btn btn-sm') do
        'Side-by-side'
      end
    end

    def submodule_link(blob, ref, repository = @repository)
      tree, commit = submodule_links(blob, ref, repository)
      commit_id = if commit.nil?
                    blob.id[0..10]
                  else
                    link_to "#{blob.id[0..10]}", commit
                  end

      [
        content_tag(:span, link_to(truncate(blob.name, length: 40), tree)),
        '@',
        content_tag(:span, commit_id, class: 'monospace'),
      ].join(' ').html_safe
    end
  end
end