Class: Canon::DiffFormatter::ByLine::SimpleFormatter

Inherits:
BaseFormatter
  • Object
show all
Defined in:
lib/canon/diff_formatter/by_line/simple_formatter.rb

Overview

Simple line-based formatter (fallback) Uses basic LCS diff without format-specific intelligence

Instance Attribute Summary

Attributes inherited from BaseFormatter

#context_lines, #diff_grouping_lines, #diff_mode, #legacy_terminal, #show_diffs, #use_color, #visualization_map

Instance Method Summary collapse

Methods inherited from BaseFormatter

#apply_bg, #apply_color, #apply_theme_style, #changed_content_styles, #compute_line_num_width, #content_style, #display_mode, for_format, #initialize, #marker_style, #normalize_color_for_rainbow, #structure_color, #structure_styles, #styled_marker, #theme, #theme_color, #theme_style, #unchanged_content_style, #visualization_chars

Constructor Details

This class inherits a constructor from Canon::DiffFormatter::ByLine::BaseFormatter

Instance Method Details

#format(doc1, doc2) ⇒ String

Format simple line-by-line diff

Parameters:

  • doc1 (String) —

    First document

  • doc2 (String) —

    Second document

Returns:

  • (String) —

    Formatted diff



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# File 'lib/canon/diff_formatter/by_line/simple_formatter.rb', line 17

def format(doc1, doc2)
  compute_line_num_width(doc1, doc2)
  output = []
  # Use split with -1 to preserve trailing empty strings (from trailing \n)
  lines1 = doc1.split("\n", -1)
  lines2 = doc2.split("\n", -1)

  # Detect non-ASCII characters in the diff
  all_text = (lines1 + lines2).join
  non_ascii = Legend.detect_non_ascii(all_text, @visualization_map)

  # Add Unicode legend if any non-ASCII characters detected
  unless non_ascii.empty?
    output << Legend.build_legend(non_ascii, use_color: @use_color)
    output << ""
  end

  # Get LCS diff
  diffs = ::Diff::LCS.sdiff(lines1, lines2)

  # Group into hunks with context
  hunks = build_hunks(diffs, lines1, lines2,
                      context_lines: @context_lines)

  # Format each hunk
  hunks.each do |hunk|
    output << format_hunk(hunk)
  end

  output.join("\n")
end