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Class: SyntaxSuggest::ScanHistory

Relationships & Source Files
Inherits: Object
Defined in: lib/syntax_suggest/scan_history.rb

Overview

Scans up/down from the given block

You can try out a change, stash it, or commit it to save for later

Example:

scanner = ScanHistory.new(code_lines: code_lines, block: block)
scanner.scan(
  up: ->(_, _, _) { true },
  down: ->(_, _, _) { true }
)
scanner.changed? # => true
expect(scanner.lines).to eq(code_lines)

scanner.stash_changes

expect(scanner.lines).to_not eq(code_lines)

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(code_lines:, block:) ⇒ ScanHistory

[ GitHub ] 

  


# File 'lib/syntax_suggest/scan_history.rb', line 24



def initialize(code_lines:, block:)
  @code_lines = code_lines
  @history = [block]
  refresh_index
end


  







Instance Attribute Details



  

    #after_index   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 22



attr_reader :before_index, :after_index


  








  

    #before_index   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 22



attr_reader :before_index, :after_index


  








  

    #changed?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 56



def changed?
  @before_index != current.lines.first.index ||
    @after_index != current.lines.last.index
end


  







Instance Method Details



  

    #after_lines   (private)
  



  

    

Returns an array of all the CodeLines that exist after the currently scanned block


  



  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 120



private def after_lines
  @code_lines[@after_index.next..-1] || []
end


  








  

    #before_lines   (private)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 114



private def before_lines
  @code_lines[0...@before_index] || []
end


  








  

    #commit_if_changed  
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 30



def commit_if_changed
  if changed?
    @history << CodeBlock.new(lines: @code_lines[before_index..after_index])
  end

  self
end


  








  

    #current   (private)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 124



private def current
  @history.last
end


  








  

    #lines  
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 110



def lines
  @code_lines[@before_index..@after_index]
end


  








  

    #next_down  
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 104



def next_down
  return nil if @after_index >= @code_lines.length

  @code_lines[@after_index + 1]
end


  








  

    #next_up  
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 98



def next_up
  return nil if @before_index <= 0

  @code_lines[@before_index - 1]
end


  








  

    #refresh_index   (private)
  

  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 128



private def refresh_index
  @before_index = current.lines.first.index
  @after_index = current.lines.last.index
  self
end


  








  

    #revert_last_commit  
  



  

    

Discard changes that have not been committed and revert the last commit



Cannot revert the first commit


  



  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 47



def revert_last_commit
  if @history.length > 1
    @history.pop
    refresh_index
  end

  self
end


  








  

    #scan(up:, down:)  
  



  

    

Iterates up and down



Returns line, kw_count, end_count for each iteration


  



  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 64



def scan(up:, down:)
  kw_count = 0
  end_count = 0

  up_index = before_lines.reverse_each.take_while do |line|
    kw_count += 1 if line.is_kw?
    end_count += 1 if line.is_end?
    up.call(line, kw_count, end_count)
  end.last&.index

  kw_count = 0
  end_count = 0

  down_index = after_lines.each.take_while do |line|
    kw_count += 1 if line.is_kw?
    end_count += 1 if line.is_end?
    down.call(line, kw_count, end_count)
  end.last&.index

  @before_index = if up_index && up_index < @before_index
    up_index
  else
    @before_index
  end

  @after_index = if down_index && down_index > @after_index
    down_index
  else
    @after_index
  end

  self
end


  








  

    #stash_changes  
  



  

    

Discards any changes that have not been committed


  



  [ GitHub ]


  

  


# File 'lib/syntax_suggest/scan_history.rb', line 39



def stash_changes
  refresh_index
  self
end