Class: Yatte::IncrementalSearch

Inherits:
Object
  • Object
show all
Defined in:
lib/yatte/incremental_search.rb

Overview

Interactive Ctrl+F search: reads keys, moves the cursor to matches, and reports status back to the editor via a ‘status:` callback.

Instance Method Summary collapse

Constructor Details

#initialize(buffer:, cursor:, input:, status:) ⇒ IncrementalSearch

Returns a new instance of IncrementalSearch.



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# File 'lib/yatte/incremental_search.rb', line 7

def initialize(buffer:, cursor:, input:, status:)
  @buffer = buffer
  @cursor = cursor
  @input = input
  @status = status
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/yatte/incremental_search.rb', line 14

def run
  saved_row = @cursor.row
  saved_col = @cursor.col
  query = +""

  loop do
    @status.call("Search: #{query} (ESC to cancel)")

    key = @input.read_keypress
    case key
    when :enter
      @status.call("")
      return
    when :escape
      @cursor.set(saved_row, saved_col)
      @status.call("")
      return
    when :backspace
      query.chop! unless query.empty?
    when :arrow_down, :ctrl_n
      seek_next(query) if query.length > 0
      next
    when :arrow_up, :ctrl_p
      seek_prev(query) if query.length > 0
      next
    when String
      query << key
    else
      next
    end

    if query.length > 0
      match = @buffer.find(query, 0, 0)
      if match
        @cursor.set(match[0], match[1])
      else
        @status.call("Search: #{query} (not found)")
      end
    end
  end
end