85 lines
2 KiB
Ruby
85 lines
2 KiB
Ruby
module Gitlab
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module Diff
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class InlineDiffMarker
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attr_accessor :raw_line, :rich_line
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def initialize(raw_line, rich_line = raw_line)
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@raw_line = raw_line
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@rich_line = rich_line
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end
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def mark(line_inline_diffs)
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offset = 0
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line_inline_diffs.each do |inline_diff_range|
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inline_diff_positions = position_mapping[inline_diff_range]
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marker_ranges = collapse_ranges(inline_diff_positions)
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marker_ranges.each do |range|
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offset = insert_around_range(rich_line, range, "<span class='idiff'>", "</span>", offset)
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end
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end
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rich_line
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end
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def position_mapping
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@position_mapping ||= begin
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mapping = []
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raw_pos = 0
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rich_pos = 0
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(0..raw_line.length).each do |raw_pos|
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raw_char = raw_line[raw_pos]
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rich_char = rich_line[rich_pos]
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while rich_char == '<'
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until rich_char == '>'
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rich_pos += 1
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rich_char = rich_line[rich_pos]
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end
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rich_pos += 1
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rich_char = rich_line[rich_pos]
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end
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mapping[raw_pos] = rich_pos
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rich_pos += 1
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end
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mapping
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end
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end
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def collapse_ranges(positions)
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return [] if positions.empty?
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ranges = []
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start = prev = positions[0]
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range = start..prev
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positions[1..-1].each do |pos|
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if pos == prev + 1
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range = start..pos
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prev = pos
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else
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ranges << range
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start = prev = pos
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range = start..prev
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end
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end
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ranges << range
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ranges
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end
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def insert_around_range(text, range, before, after, offset = 0)
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text.insert(offset + range.begin, before)
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offset += before.length
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text.insert(offset + range.end + 1, after)
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offset += after.length
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offset
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end
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end
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end
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end
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