lib/sup/modes/completion_mode.rb

lib/sup/modes/completion_mode.rb (1385B) - raw
      1 module Redwood
      2 
      3 class CompletionMode < ScrollMode
      4   INTERSTITIAL = "  "
      5 
      6   def initialize list, opts={}
      7     @list = list
      8     @header = opts[:header]
      9     @prefix_len = opts[:prefix_len]
     10     @lines = nil
     11     super :slip_rows => 1, :twiddles => false
     12   end
     13 
     14   def lines
     15     update_lines unless @lines
     16     @lines.length
     17   end
     18 
     19   def [] i
     20     update_lines unless @lines
     21     @lines[i]
     22   end
     23 
     24   def roll; if at_bottom? then jump_to_start else page_down end end
     25 
     26 private
     27 
     28   def update_lines
     29     max_length = @list.max_of { |s| s.length }
     30     num_per = [1, buffer.content_width / (max_length + INTERSTITIAL.length)].max
     31     @lines = [@header].compact
     32     @list.each_with_index do |s, i|
     33       if @prefix_len
     34         @lines << [] if i % num_per == 0
     35         if @prefix_len < s.length
     36           prefix = s[0 ... @prefix_len]
     37           suffix = s[(@prefix_len + 1) .. -1]
     38           char = s[@prefix_len].chr
     39 
     40           @lines.last += [[:text_color, sprintf("%#{max_length - suffix.length - 1}s", prefix)],
     41                           [:completion_character_color, char],
     42                           [:text_color, suffix + INTERSTITIAL]]
     43         else
     44           @lines.last += [[:text_color, sprintf("%#{max_length}s#{INTERSTITIAL}", s)]]
     45         end
     46       else
     47         @lines << "" if i % num_per == 0
     48         @lines.last += sprintf "%#{max_length}s#{INTERSTITIAL}", s
     49       end
     50     end
     51   end
     52 end
     53 
     54 end
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