Class: SyntaxSuggest::Capture::BeforeAfterKeywordEnds

Inherits:
Object
  • Object
show all
Defined in:
lib/syntax_suggest/capture/before_after_keyword_ends.rb

Overview

Shows surrounding kw/end pairs

The purpose of showing these extra pairs is due to cases of ambiguity when only one visible line is matched.

For example:

1  class Dog
2    def bark
4    def eat
5    end
6  end

In this case either line 2 could be missing an ‘end` or line 4 was an extra line added by mistake (it happens).

When we detect the above problem it shows the issue as only being on line 2

2    def bark

Showing “neighbor” keyword pairs gives extra context:

2    def bark
4    def eat
5    end

Example:

lines = BeforeAfterKeywordEnds.new(
  block: block,
  code_lines: code_lines
).call()

Instance Method Summary collapse

Constructor Details

#initialize(code_lines:, block:) ⇒ BeforeAfterKeywordEnds

Returns a new instance of BeforeAfterKeywordEnds.



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# File 'lib/syntax_suggest/capture/before_after_keyword_ends.rb', line 41

def initialize(code_lines:, block:)
  @scanner = ScanHistory.new(code_lines: code_lines, block: block)
  @original_indent = block.current_indent
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/syntax_suggest/capture/before_after_keyword_ends.rb', line 46

def call
  lines = []

  @scanner.scan(
    up: ->(line, kw_count, end_count) {
      next true if line.empty?
      break if line.indent < @original_indent
      next true if line.indent != @original_indent

      # If we're going up and have one complete kw/end pair, stop
      if kw_count != 0 && kw_count == end_count
        lines << line
        break
      end

      lines << line if line.is_kw? || line.is_end?
      true
    },
    down: ->(line, kw_count, end_count) {
      next true if line.empty?
      break if line.indent < @original_indent
      next true if line.indent != @original_indent

      # if we're going down and have one complete kw/end pair,stop
      if kw_count != 0 && kw_count == end_count
        lines << line
        break
      end

      lines << line if line.is_kw? || line.is_end?
      true
    }
  )
  @scanner.stash_changes

  lines
end