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[ruby/reline] Stop rerendering whole screen when adding newline at end of buffer

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The rendering time in IRB has been reduced as follows:

  start = Time.now

  def each_top_level_statement
    initialize_input
    catch(:TERM_INPUT) do
      loop do
        begin
          prompt
          unless l = lex
            throw :TERM_INPUT if @line == ''
          else
            @line_no += l.count("\n")
            next if l == "\n"
            @line.concat l
            if @code_block_open or @ltype or @continue or @indent > 0
              next
            end
          end
          if @line != "\n"
            @line.force_encoding(@io.encoding)
            yield @line, @exp_line_no
          end
          break if @io.eof?
          @line = ''
          @exp_line_no = @line_no

          @indent = 0
        rescue TerminateLineInput
          initialize_input
          prompt
        end
      end
    end
  end

  puts "Duration: #{Time.now - start} seconds"

0.33sec -> 0.22sec

https://github.com/ruby/reline/commit/496c6a1892
This commit is contained in:
aycabta 2020-11-19 22:59:16 +09:00
parent fb2fda9a27
commit b545ab219b
1 changed files with 20 additions and 1 deletions
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21
lib/reline/line_editor.rb
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@ -187,6 +187,7 @@ class Reline::LineEditor
@first_prompt = true
@searching_prompt = nil
@first_char = true
@add_newline_to_end_of_buffer = false
@eof = false
@continuous_insertion_buffer = String.new(encoding: @encoding)
reset_line
@ -352,7 +353,22 @@ class Reline::LineEditor
end
new_highest_in_this = calculate_height_by_width(prompt_width + calculate_width(@line.nil? ? '' : @line))
# FIXME: end of logical line sometimes breaks
if @previous_line_index or new_highest_in_this != @highest_in_this
if @add_newline_to_end_of_buffer
scroll_down(1)
new_lines = whole_lines(index: @previous_line_index, line: @line)
prompt, prompt_width, prompt_list = check_multiline_prompt(new_lines, prompt)
@buffer_of_lines[@previous_line_index] = @line
@line = @buffer_of_lines[@line_index]
render_partial(prompt, prompt_width, @line, false)
@cursor = @cursor_max = calculate_width(@line)
@byte_pointer = @line.bytesize
@highest_in_all += @highest_in_this
@highest_in_this = calculate_height_by_width(prompt_width + @cursor_max)
@first_line_started_from += @started_from + 1
@started_from = calculate_height_by_width(prompt_width + @cursor) - 1
@previous_line_index = nil
@add_newline_to_end_of_buffer = false
elsif @previous_line_index or new_highest_in_this != @highest_in_this
if @previous_line_index
new_lines = whole_lines(index: @previous_line_index, line: @line)
else
@ -1116,6 +1132,9 @@ class Reline::LineEditor
private def key_newline(key)
if @is_multiline
if (@buffer_of_lines.size - 1) == @line_index and @line.bytesize == @byte_pointer
@add_newline_to_end_of_buffer = true
end
next_line = @line.byteslice(@byte_pointer, @line.bytesize - @byte_pointer)
cursor_line = @line.byteslice(0, @byte_pointer)
insert_new_line(cursor_line, next_line)