gitlab-org--gitlab-foss/lib/gitlab/diff/highlight.rb

88 lines
2.6 KiB
Ruby

# frozen_string_literal: true
module Gitlab
module Diff
class Highlight
attr_reader :diff_file, :diff_lines, :raw_lines, :repository
delegate :old_path, :new_path, :old_sha, :new_sha, to: :diff_file, prefix: :diff
def initialize(diff_lines, repository: nil)
@repository = repository
if diff_lines.is_a?(Gitlab::Diff::File)
@diff_file = diff_lines
@diff_lines = @diff_file.diff_lines
else
@diff_lines = diff_lines
end
@raw_lines = @diff_lines.map(&:text)
end
def highlight
@diff_lines.map.with_index do |diff_line, i|
diff_line = diff_line.dup
# ignore highlighting for "match" lines
next diff_line if diff_line.meta?
rich_line = highlight_line(diff_line) || ERB::Util.html_escape(diff_line.text)
if line_inline_diffs = inline_diffs[i]
begin
rich_line = InlineDiffMarker.new(diff_line.text, rich_line).mark(line_inline_diffs)
# This should only happen when the encoding of the diff doesn't
# match the blob, which is a bug. But we shouldn't fail to render
# completely in that case, even though we want to report the error.
rescue RangeError => e
Gitlab::ErrorTracking.track_and_raise_for_dev_exception(e, issue_url: 'https://gitlab.com/gitlab-org/gitlab-foss/issues/45441')
end
end
diff_line.rich_text = rich_line
diff_line
end
end
private
def highlight_line(diff_line)
return unless diff_file && diff_file.diff_refs
rich_line =
if diff_line.unchanged? || diff_line.added?
new_lines[diff_line.new_pos - 1]&.html_safe
elsif diff_line.removed?
old_lines[diff_line.old_pos - 1]&.html_safe
end
# Only update text if line is found. This will prevent
# issues with submodules given the line only exists in diff content.
if rich_line
line_prefix = diff_line.text =~ /\A(.)/ ? Regexp.last_match(1) : ' '
"#{line_prefix}#{rich_line}".html_safe
end
end
def inline_diffs
@inline_diffs ||= InlineDiff.for_lines(@raw_lines)
end
def old_lines
@old_lines ||= highlighted_blob_lines(diff_file.old_blob)
end
def new_lines
@new_lines ||= highlighted_blob_lines(diff_file.new_blob)
end
def highlighted_blob_lines(blob)
return [] unless blob
blob.load_all_data!
blob.present.highlight.lines
end
end
end
end