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module Gitlab
module Diff
class Highlight
attr_reader :diff_file, :diff_lines, :raw_lines
delegate :old_path, :new_path, :old_ref, :new_ref, to: :diff_file, prefix: :diff
def initialize(diff_lines)
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.type == 'match' || diff_line.type == 'nonewline'
rich_line = highlight_line(diff_line) || diff_line.text
if line_inline_diffs = inline_diffs[i]
rich_line = InlineDiffMarker.new(diff_line.text, rich_line).mark(line_inline_diffs)
end
diff_line.text = rich_line
diff_line
end
end
private
def highlight_line(diff_line)
return unless diff_file && diff_file.diff_refs
line_prefix = diff_line.text.match(/\A(.)/) ? $1 : ' '
case diff_line.type
when 'new', nil
rich_line = new_lines[diff_line.new_pos - 1]
when 'old'
rich_line = old_lines[diff_line.old_pos - 1]
end
# Only update text if line is found. This will prevent
# issues with submodules given the line only exists in diff content.
"#{line_prefix}#{rich_line}".html_safe if rich_line
end
def inline_diffs
@inline_diffs ||= InlineDiff.for_lines(@raw_lines)
end
def old_lines
return unless diff_file
@old_lines ||= Gitlab::Highlight.highlight_lines(*processing_args(:old))
end
def new_lines
return unless diff_file
@new_lines ||= Gitlab::Highlight.highlight_lines(*processing_args(:new))
end
def processing_args(version)
ref = send("diff_#{version}_ref")
path = send("diff_#{version}_path")
[ref.project.repository, ref.id, path]
end
end
end
end
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