зеркало из https://github.com/github/ruby.git
101 строка
2.1 KiB
Ruby
101 строка
2.1 KiB
Ruby
# frozen_string_literal: true
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module SyntaxSuggest
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# Multiple lines form a singular CodeBlock
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#
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# Source code is made of multiple CodeBlocks.
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#
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# Example:
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#
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# code_block.to_s # =>
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# # def foo
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# # puts "foo"
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# # end
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#
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# code_block.valid? # => true
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# code_block.in_valid? # => false
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#
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#
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class CodeBlock
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UNSET = Object.new.freeze
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attr_reader :lines, :starts_at, :ends_at
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def initialize(lines: [])
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@lines = Array(lines)
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@valid = UNSET
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@deleted = false
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@starts_at = @lines.first.number
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@ends_at = @lines.last.number
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end
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def delete
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@deleted = true
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end
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def deleted?
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@deleted
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end
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def visible_lines
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@lines.select(&:visible?).select(&:not_empty?)
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end
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def mark_invisible
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@lines.map(&:mark_invisible)
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end
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def is_end?
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to_s.strip == "end"
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end
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def hidden?
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@lines.all?(&:hidden?)
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end
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# This is used for frontier ordering, we are searching from
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# the largest indentation to the smallest. This allows us to
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# populate an array with multiple code blocks then call `sort!`
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# on it without having to specify the sorting criteria
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def <=>(other)
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out = current_indent <=> other.current_indent
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return out if out != 0
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# Stable sort
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starts_at <=> other.starts_at
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end
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def current_indent
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@current_indent ||= lines.select(&:not_empty?).map(&:indent).min || 0
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end
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def invalid?
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!valid?
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end
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def valid?
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if @valid == UNSET
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# Performance optimization
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#
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# If all the lines were previously hidden
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# and we expand to capture additional empty
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# lines then the result cannot be invalid
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#
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# That means there's no reason to re-check all
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# lines with the parser (which is expensive).
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# Benchmark in commit message
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@valid = if lines.all? { |l| l.hidden? || l.empty? }
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true
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else
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SyntaxSuggest.valid?(lines.map(&:original).join)
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end
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else
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@valid
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end
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end
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def to_s
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@lines.join
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end
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end
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end
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