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