Class: Canon::DiffFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/canon/diff_formatter.rb,
lib/canon/diff_formatter/theme.rb,
lib/canon/diff_formatter/legend.rb,
lib/canon/diff_formatter/debug_output.rb,
lib/canon/diff_formatter/by_line_formatter.rb,
lib/canon/diff_formatter/by_object_formatter.rb,
lib/canon/diff_formatter/by_line/xml_formatter.rb,
lib/canon/diff_formatter/diff_detail_formatter.rb,
lib/canon/diff_formatter/pretty_diff_formatter.rb,
lib/canon/diff_formatter/by_line/base_formatter.rb,
lib/canon/diff_formatter/by_line/html_formatter.rb,
lib/canon/diff_formatter/by_line/json_formatter.rb,
lib/canon/diff_formatter/by_line/yaml_formatter.rb,
lib/canon/diff_formatter/by_object/xml_formatter.rb,
lib/canon/diff_formatter/by_line/simple_formatter.rb,
lib/canon/diff_formatter/by_object/base_formatter.rb,
lib/canon/diff_formatter/by_object/json_formatter.rb,
lib/canon/diff_formatter/by_object/yaml_formatter.rb,
lib/canon/diff_formatter/diff_detail_formatter/node_utils.rb,
lib/canon/diff_formatter/diff_detail_formatter/text_utils.rb,
lib/canon/diff_formatter/diff_detail_formatter/color_helper.rb,
lib/canon/diff_formatter/diff_detail_formatter/location_extractor.rb,
lib/canon/diff_formatter/diff_detail_formatter/dimension_formatter.rb

Overview

Formatter for displaying semantic differences with color support

This is a pure orchestrator class that delegates formatting to mode-specific and format-specific formatters. It provides a unified interface for generating both by-line and by-object diffs across multiple formats (XML, HTML, JSON, YAML).

Architecture

DiffFormatter follows the orchestrator pattern with MECE (Mutually Exclusive, Collectively Exhaustive) delegation:

  1. **Mode Selection**: Chooses by-line or by-object visualization

  2. **Format Delegation**: Dispatches to format-specific formatter

  3. Customization: Applies color, context, and visualization options

Diff Modes

**By-Object Mode** (default for XML/JSON/YAML):

  • Tree-based semantic diff

  • Shows only what changed in the structure

  • Visual tree with box-drawing characters

  • Best for configuration files and structured data

**By-Line Mode** (default for HTML):

  • Traditional line-by-line diff

  • Shows changes in document order with context

  • Syntax-aware token highlighting

  • Best for markup and when line context matters

Visualization Features

  • **Color support**: Red (deletions), green (additions), yellow (structure), cyan (informative)

  • **Whitespace visualization**: Makes invisible characters visible

  • **Context lines**: Shows unchanged lines around changes

  • **Diff grouping**: Groups nearby changes into blocks

  • **Character map customization**: CJK-safe Unicode symbols

Usage

# Basic usage
formatter = Canon::DiffFormatter.new(use_color: true, mode: :by_object)
output = formatter.format(differences, :xml, doc1: xml1, doc2: xml2)

# With options
formatter = Canon::DiffFormatter.new(
  use_color: true,
  mode: :by_line,
  context_lines: 5,
  diff_grouping_lines: 10,
  show_diffs: :normative
)

Defined Under Namespace

Modules: ByLine, ByObject, DebugOutput, DiffDetailFormatter, DiffDetailFormatterHelpers, Legend, Theme Classes: ByLineFormatter, ByObjectFormatter, PrettyDiffFormatter

Constant Summary collapse

DEFAULT_VISUALIZATION_MAP = 
character_map_data[:visualization_map].freeze
CHARACTER_CATEGORY_MAP = 
character_map_data[:category_map].freeze
CHARACTER_CATEGORY_NAMES = 
character_map_data[:category_names].freeze
CHARACTER_METADATA = 
character_map_data[:character_metadata].freeze
DIFF_DESCRIPTIONS =

Map difference codes to human-readable descriptions

{
  Comparison::EQUIVALENT => "Equivalent",
  Comparison::MISSING_ATTRIBUTE => "Missing attribute",
  Comparison::MISSING_NODE => "Missing node",
  Comparison::UNEQUAL_ATTRIBUTES => "Unequal attributes",
  Comparison::UNEQUAL_COMMENTS => "Unequal comments",
  Comparison::UNEQUAL_DOCUMENTS => "Unequal documents",
  Comparison::UNEQUAL_ELEMENTS => "Unequal elements",
  Comparison::UNEQUAL_NODES_TYPES => "Unequal node types",
  Comparison::UNEQUAL_TEXT_CONTENTS => "Unequal text contents",
  Comparison::MISSING_HASH_KEY => "Missing hash key",
  Comparison::UNEQUAL_HASH_VALUES => "Unequal hash values",
  Comparison::UNEQUAL_ARRAY_LENGTHS => "Unequal array lengths",
  Comparison::UNEQUAL_ARRAY_ELEMENTS => "Unequal array elements",
  Comparison::UNEQUAL_TYPES => "Unequal types",
  Comparison::UNEQUAL_PRIMITIVES => "Unequal primitive values",
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(use_color: true, mode: :by_object, context_lines: 3, diff_grouping_lines: nil, visualization_map: nil, character_map_file: nil, character_definitions: nil, show_diffs: :all, verbose_diff: false, show_raw_inputs: false, show_raw_expected: false, show_raw_received: false, show_preprocessed_inputs: false, show_preprocessed_expected: false, show_preprocessed_received: false, show_prettyprint_inputs: false, show_prettyprint_expected: false, show_prettyprint_received: false, show_line_numbered_inputs: false, character_visualization: true, display_preprocessing: :none, pretty_printer_indent: 2, pretty_printer_indent_type: :space, preserve_whitespace_elements: [], collapse_whitespace_elements: [], strip_whitespace_elements: [], pretty_printed_expected: false, pretty_printed_received: false, pretty_printer_sort_attributes: false, compact_semantic_report: false, expand_difference: false, diff_mode: :separate, legacy_terminal: false) ⇒ DiffFormatter

rubocop:disable Metrics/ParameterLists



170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
 
# File 'lib/canon/diff_formatter.rb', line 170

def initialize(use_color: true, mode: :by_object, context_lines: 3,
               diff_grouping_lines: nil, visualization_map: nil,
               character_map_file: nil, character_definitions: nil,
               show_diffs: :all, verbose_diff: false,
               show_raw_inputs: false, show_raw_expected: false,
               show_raw_received: false,
               show_preprocessed_inputs: false,
               show_preprocessed_expected: false,
               show_preprocessed_received: false,
               show_prettyprint_inputs: false,
               show_prettyprint_expected: false,
               show_prettyprint_received: false,
               show_line_numbered_inputs: false,
               character_visualization: true,
               display_preprocessing: :none,
               pretty_printer_indent: 2,
               pretty_printer_indent_type: :space,
               preserve_whitespace_elements: [],
               collapse_whitespace_elements: [],
               strip_whitespace_elements: [],
               pretty_printed_expected: false,
               pretty_printed_received: false,
               pretty_printer_sort_attributes: false,
               compact_semantic_report: false,
               expand_difference: false,
               diff_mode: :separate, legacy_terminal: false)
  # rubocop:enable Metrics/ParameterLists
  @use_color = use_color
  @mode = mode
  @context_lines = context_lines
  @diff_grouping_lines = diff_grouping_lines
  @show_diffs = show_diffs
  @verbose_diff = verbose_diff
  @show_raw_inputs = show_raw_inputs
  @show_raw_expected = show_raw_expected
  @show_raw_received = show_raw_received
  @show_preprocessed_inputs = show_preprocessed_inputs
  @show_preprocessed_expected = show_preprocessed_expected
  @show_preprocessed_received = show_preprocessed_received
  @show_prettyprint_inputs = show_prettyprint_inputs
  @show_prettyprint_expected = show_prettyprint_expected
  @show_prettyprint_received = show_prettyprint_received
  @show_line_numbered_inputs = show_line_numbered_inputs
  @character_visualization = character_visualization
  @display_preprocessing = display_preprocessing
  @pretty_printer_indent = pretty_printer_indent
  @pretty_printer_indent_type = pretty_printer_indent_type
  @preserve_whitespace_elements = Array(preserve_whitespace_elements).map(&:to_s)
  @collapse_whitespace_elements = Array(collapse_whitespace_elements).map(&:to_s)
  @strip_whitespace_elements = Array(strip_whitespace_elements).map(&:to_s)
  @pretty_printed_expected = pretty_printed_expected
  @pretty_printed_received = pretty_printed_received
  @pretty_printer_sort_attributes = pretty_printer_sort_attributes
  @compact_semantic_report = compact_semantic_report
  @expand_difference = expand_difference
  @diff_mode = legacy_terminal ? :separate : diff_mode
  @legacy_terminal = legacy_terminal
  @visualization_map = build_visualization_map(
    character_visualization: character_visualization,
    visualization_map: visualization_map,
    character_map_file: character_map_file,
    character_definitions: character_definitions,
  )
end

Class Method Details

.build_character_definition(definition) ⇒ Hash

Build character definition from hash

Parameters:

  • definition (Hash) —

    Character definition with keys (matching YAML format):

    • :character or :unicode (required)

    • :visualization (required)

    • :category (required)

    • :name (required)

Returns:

  • (Hash) —

    Single-entry visualization map



273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
 
# File 'lib/canon/diff_formatter.rb', line 273

def self.build_character_definition(definition)
  # Validate required fields
  char = if definition[:unicode]
           [definition[:unicode].to_i(16)].pack("U")
         elsif definition[:character]
           definition[:character]
         else
           raise ArgumentError,
                 "Character definition must include :character or :unicode"
         end

  unless definition[:visualization]
    raise ArgumentError, "Character definition must include :visualization"
  end

  unless definition[:category]
    raise ArgumentError, "Character definition must include :category"
  end

  unless definition[:name]
    raise ArgumentError, "Character definition must include :name"
  end

  { char => definition[:visualization] }
end

.character_map_data ⇒ Object

Lazily load and cache character map data



133
134
135
 
# File 'lib/canon/diff_formatter.rb', line 133

def self.character_map_data
  @character_map_data ||= load_character_map
end

.load_character_map ⇒ Hash

Load character map from YAML file

Returns:

  • (Hash) —

    Hash with :visualization_map, :category_map, :category_names



88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
 
# File 'lib/canon/diff_formatter.rb', line 88

def self.load_character_map
  yaml_path = File.join(__dir__, "diff_formatter", "character_map.yml")
  data = YAML.load_file(yaml_path)

  visualization_map = {}
  category_map = {}
  character_metadata = {}

  data["characters"].each do |char_data|
    # Get character from either unicode code point or character field
    char = if char_data["unicode"]
             # Convert hex string to character
             [char_data["unicode"].to_i(16)].pack("U")
           else
             # Use character field directly (handles \n, \r, \t, etc.)
             char_data["character"]
           end

    vis = char_data["visualization"]
    category = char_data["category"].to_sym
    name = char_data["name"]

    visualization_map[char] = vis
    category_map[char] = category
    character_metadata[char] = {
      visualization: vis,
      category: category,
      name: name,
    }
  end

  category_names = {}
  data["category_names"].each do |key, value|
    category_names[key.to_sym] = value
  end

  {
    visualization_map: visualization_map,
    category_map: category_map,
    category_names: category_names,
    character_metadata: character_metadata,
  }
end

.load_custom_character_map(file_path) ⇒ Hash

Load character map from custom YAML file

Parameters:

  • file_path (String) —

    Path to YAML file with character definitions

Returns:

  • (Hash) —

    Character visualization map



247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
 
# File 'lib/canon/diff_formatter.rb', line 247

def self.load_custom_character_map(file_path)
  data = YAML.load_file(file_path)
  visualization_map = {}

  data["characters"].each do |char_data|
    # Get character from either unicode code point or character field
    char = if char_data["unicode"]
             [char_data["unicode"].to_i(16)].pack("U")
           else
             char_data["character"]
           end

    visualization_map[char] = char_data["visualization"]
  end

  visualization_map
end

.merge_visualization_map(custom_map) ⇒ Hash

Merge custom character visualization map with defaults

Parameters:

  • custom_map (Hash, nil) —

    Custom character mappings

Returns:

  • (Hash) —

    Merged character visualization map



239
240
241
 
# File 'lib/canon/diff_formatter.rb', line 239

def self.merge_visualization_map(custom_map)
  DEFAULT_VISUALIZATION_MAP.merge(custom_map || {})
end

Instance Method Details

#format(differences, format, doc1: nil, doc2: nil, html_version: nil) ⇒ String

Format differences array for display

Parameters:

  • differences (Array) —

    Array of difference hashes

  • format (Symbol) —

    Format type (:xml, :html, :json, :yaml)

  • doc1 (String, nil) (defaults to: nil) —

    First document content (for by-line mode)

  • doc2 (String, nil) (defaults to: nil) —

    Second document content (for by-line mode)

  • html_version (Symbol, nil) (defaults to: nil) —

    HTML version (:html4 or :html5)

Returns:

  • (String) —

    Formatted output



307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
 
# File 'lib/canon/diff_formatter.rb', line 307

def format(differences, format, doc1: nil, doc2: nil, html_version: nil)
  # In by-line mode with both docs present, always use by-line diff
  if @mode == :by_line && doc1 && doc2
    doc1, doc2 = apply_display_preprocessing(doc1, doc2, format)
    # rubocop:disable Layout/HashAlignment
    return by_line_formatter.format(doc1, doc2, format: format,
                                              html_version: html_version,
                                              differences: differences)
    # rubocop:enable Layout/HashAlignment
  end

  # In pretty_diff mode, always use text-LCS diff (bypasses DiffNodeMapper).
  if @mode == :pretty_diff
    d1, d2 = if doc1 && doc2
               apply_display_preprocessing(doc1, doc2,
                                           format)
             else
               [doc1,
                doc2]
             end
    return pretty_diff_formatter.format(d1, d2, format: format)
  end

  no_diffs = if differences.is_a?(Canon::Comparison::ComparisonResult)
               differences.equivalent?
             else
               differences.empty?
             end
  return success_message if no_diffs

  case @mode
  when :by_line
    if doc1 && doc2
      doc1, doc2 = apply_display_preprocessing(doc1, doc2,
                                               format)
    end
    # rubocop:disable Layout/HashAlignment
    by_line_formatter.format(doc1, doc2, format: format,
                                           html_version: html_version,
                                           differences: differences)
    # rubocop:enable Layout/HashAlignment
  when :pretty_diff
    d1, d2 = if doc1 && doc2
               apply_display_preprocessing(doc1, doc2,
                                           format)
             else
               [doc1,
                doc2]
             end
    pretty_diff_formatter.format(d1, d2, format: format)
  else
    by_object_formatter.format(differences, format)
  end
end

#format_comparison_result(comparison_result, expected, actual) ⇒ String

Format comparison result from Canon::Comparison.equivalent? This is the single entry point for generating diffs from comparison results

Parameters:

  • comparison_result (ComparisonResult, Hash, Array, Boolean) —

    Result from Canon::Comparison.equivalent?

  • expected (Object) —

    Expected value

  • actual (Object) —

    Actual value

Returns:

  • (String) —

    Formatted diff output



369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
 
# File 'lib/canon/diff_formatter.rb', line 369

def format_comparison_result(comparison_result, expected, actual)
  # Prefer the matcher-supplied format (e.g. :html4 from
  # be_html4_equivalent_to). Auto-detection from the expected string
  # cannot distinguish HTML from XML for fragments like
  # `<div class="x"></div>` and would mis-route HTML fixtures
  # through the XML pretty-printer (issue #135).
  format = (comparison_result.is_a?(Canon::Comparison::ComparisonResult) && comparison_result.format) ||
    Canon::Comparison::FormatDetector.detect(expected)

  formatter_options = {
    use_color: @use_color,
    mode: @mode,
    context_lines: @context_lines,
    diff_grouping_lines: @diff_grouping_lines,
    show_diffs: @show_diffs,
    verbose_diff: @verbose_diff,
  }

  output = []

  # Display the algorithm being used
  if comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    algorithm_name = case comparison_result.algorithm
                     when :semantic
                       "SEMANTIC TREE DIFF"
                     else
                       "DOM DIFF"
                     end
    output << colorize("Algorithm: #{algorithm_name}", :cyan, :bold)
    output << "" # Blank line for spacing
  end

  # Parse-error banner.  When libxml flagged any errors during
  # parsing, surface them at the top of the report so the user
  # is not left chasing diffs that describe a partial tree.
  # See lutaml/canon#130.
  if comparison_result.is_a?(Canon::Comparison::ComparisonResult) &&
      comparison_result.parse_errors?
    output << format_parse_error_banner(
      comparison_result.parse_errors_expected,
      comparison_result.parse_errors_received,
    )
  end

  # 1. CANON VERBOSE tables (ONLY if CANON_VERBOSE=1)
  verbose_tables = DebugOutput.verbose_tables_only(
    comparison_result,
    formatter_options,
  )
  output << verbose_tables unless verbose_tables.empty?

  # 2. Semantic Diff Report (ALWAYS if diffs exist)
  if comparison_result.is_a?(Canon::Comparison::ComparisonResult) &&
      comparison_result.differences.any?
    require_relative "diff_formatter/diff_detail_formatter"
    output << DiffDetailFormatter.format_report(
      comparison_result.differences,
      use_color: @use_color,
      show_diffs: @show_diffs,
      compact_semantic_report: @compact_semantic_report,
      expand_difference: @expand_difference,
    )
  end

  # verbose_diff / show_raw_inputs shows both sides as a convenience shorthand.
  # show_raw_expected / show_raw_received give per-side control.
  combined_raw = @verbose_diff || @show_raw_inputs
  show_raw_exp = combined_raw || @show_raw_expected
  show_raw_rec = combined_raw || @show_raw_received
  verbose      = show_raw_exp || show_raw_rec
  # verbose_diff / show_preprocessed_inputs shows both sides as a shorthand.
  # show_preprocessed_expected / show_preprocessed_received give per-side control.
  combined_prep = @verbose_diff || @show_preprocessed_inputs
  show_prep_exp = combined_prep || @show_preprocessed_expected
  show_prep_rec = combined_prep || @show_preprocessed_received
  show_prep = show_prep_exp || show_prep_rec
  show_line = @verbose_diff || @show_line_numbered_inputs

  # 3. Raw/Original Input Display (when show_raw_inputs/show_raw_expected/show_raw_received enabled)
  if verbose && comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    original1, original2 = comparison_result.original_strings
    if original1 && original2
      output << format_raw_inputs(original1, original2,
                                  show_expected: show_raw_exp,
                                  show_received: show_raw_rec)
    end
  end

  # 4. Preprocessed Input Display (when show_preprocessed_inputs/expected/received enabled)
  if show_prep && comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    preprocessed1, preprocessed2 = comparison_result.preprocessed_strings
    if preprocessed1 && preprocessed2
      preprocessing_info = comparison_result.match_options&.dig(:match,
                                                                :preprocessing)
      output << format_preprocessed_inputs(preprocessed1, preprocessed2,
                                           preprocessing_info,
                                           show_expected: show_prep_exp,
                                           show_received: show_prep_rec)
    end
  end

  # 4.5. Pretty-printed Input Display (when show_prettyprint_inputs/expected/received enabled)
  # Pretty-prints the ORIGINAL strings (not preprocessed) through PrettyPrinter::Xml/Html
  # with NO character visualization — output is plain ASCII suitable for copy-pasting
  # into RSpec fixture heredocs.  verbose_diff does NOT enable these options.
  show_pp_inp = @show_prettyprint_inputs
  show_pp_exp = show_pp_inp || @show_prettyprint_expected
  show_pp_rec = show_pp_inp || @show_prettyprint_received
  show_pp = show_pp_exp || show_pp_rec

  if show_pp && comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    orig1, orig2 = comparison_result.original_strings
    if orig1 && orig2
      pp1, pp2 = prettyprint_for_display(orig1, orig2, format)
      output << format_prettyprint_inputs(pp1, pp2,
                                          show_expected: show_pp_exp,
                                          show_received: show_pp_rec)
    end
  end

  # 5. Line-Numbered Input Display (when show_line_numbered_inputs is enabled)
  if show_line && comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    original1, original2 = comparison_result.original_strings
    if original1 && original2
      output << format_line_numbered_inputs(original1, original2)
    end
  end

  # 6. Main diff output (by-line or by-object) - ALWAYS

  # Check if comparison result is a ComparisonResult object
  if comparison_result.is_a?(Canon::Comparison::ComparisonResult)
    # Use original strings for line diff to show actual formatting/namespace differences
    # Use preprocessed strings for semantic comparison only
    doc1, doc2 = comparison_result.original_strings
    differences = comparison_result.differences
    html_version = comparison_result.html_version
  elsif comparison_result.is_a?(Hash) && comparison_result[:preprocessed]
    # Legacy Hash format - Use preprocessed strings from comparison
    doc1, doc2 = comparison_result[:preprocessed]
    differences = comparison_result[:differences]
    html_version = comparison_result[:html_version]
  else
    # Legacy path: normalize content for display
    doc1, doc2 = normalize_content_for_display(expected, actual, format)
    # comparison_result is an array of differences when verbose: true
    differences = comparison_result.is_a?(Array) ? comparison_result : []
    html_version = nil
  end

  # Generate diff using existing format method
  output << format(differences, format, doc1: doc1, doc2: doc2,
                                        html_version: html_version)

  output.compact.join("\n")
end

#format_line_numbered_inputs(original1, original2) ⇒ String

Format original input strings with line numbers (RSpec-style) Shows the actual strings that were passed in with line numbers for reference

Parameters:

  • original1 (String) —

    First original input string

  • original2 (String) —

    Second original input string

Returns:

  • (String) —

    Formatted display with line numbers



641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
 
# File 'lib/canon/diff_formatter.rb', line 641

def format_line_numbered_inputs(original1, original2)
  return "" if original1.nil? || original2.nil?

  output = []
  output << ""
  output << colorize("=" * 70, :cyan, :bold)
  output << colorize("  ORIGINAL INPUTS (with line numbers)", :cyan, :bold)
  output << colorize("=" * 70, :cyan, :bold)
  output << ""

  # Format expected
  output << colorize("Expected:", :yellow, :bold)
  original1.each_line.with_index do |line, idx|
    output << "  #{colorize(sprintf('%4d', idx + 1),
                            :blue)} | #{line.chomp}"
  end
  output << ""

  # Format actual
  output << colorize("Received:", :yellow, :bold)
  original2.each_line.with_index do |line, idx|
    output << "  #{colorize(sprintf('%4d', idx + 1),
                            :blue)} | #{line.chomp}"
  end
  output << ""
  output << colorize("=" * 70, :cyan, :bold)
  output << ""

  output.join("\n")
end

#format_preprocessed_inputs(preprocessed1, preprocessed2, preprocessing_info = nil, show_expected: true, show_received: true) ⇒ String

Format preprocessed inputs for display (what was actually compared) Shows the content after preprocessing (c14n, normalize, format, etc.)

Use show_expected: and show_received: to control which side is rendered. Both default to true so existing callers are unaffected. Pass show_expected: false to suppress the fixture/expected block while still showing the preprocessed received output.

Parameters:

  • preprocessed1 (String) —

    First preprocessed string (expected / fixture)

  • preprocessed2 (String) —

    Second preprocessed string (received / actual)

  • preprocessing_info (Symbol, nil) (defaults to: nil) —

    Preprocessing mode (:c14n, :normalize, :format, etc.)

  • show_expected (Boolean) (defaults to: true) —

    Render the EXPECTED block

  • show_received (Boolean) (defaults to: true) —

    Render the RECEIVED block

Returns:

  • (String) —

    Formatted display of preprocessed inputs



727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
 
# File 'lib/canon/diff_formatter.rb', line 727

def format_preprocessed_inputs(preprocessed1, preprocessed2,
                               preprocessing_info = nil,
                               show_expected: true, show_received: true)
  return "" if preprocessed1.nil? || preprocessed2.nil?
  return "" unless show_expected || show_received

  output = []
  output << ""
  output << colorize("=== PREPROCESSED INPUTS (Compared) ===", :cyan, :bold)

  # Show preprocessing mode if available
  if preprocessing_info
    output << "Preprocessing: #{preprocessing_info}"
  end
  output << ""

  if show_expected
    output << colorize("EXPECTED:", :yellow, :bold)
    output << ("-" * 70)
    output << preprocessed1
    output << ""
  end

  if show_received
    output << colorize("RECEIVED:", :yellow, :bold)
    output << ("-" * 70)
    output << preprocessed2
    output << ""
  end

  output << ""
  output.join("\n")
end

#format_raw_inputs(raw1, raw2, show_expected: true, show_received: true) ⇒ String

Format raw/original inputs for display (user-friendly copyable format) Shows the raw file contents before any preprocessing.

Use show_expected: and show_received: to control which side is rendered. Both default to true so existing callers are unaffected. Pass show_expected: false to suppress the fixture/expected block while still showing the received output (useful when the fixture is very long and the user only wants to see what the generator produced).

Parameters:

  • raw1 (String) —

    First raw input string (expected / fixture)

  • raw2 (String) —

    Second raw input string (received / actual)

  • show_expected (Boolean) (defaults to: true) —

    Render the EXPECTED block

  • show_received (Boolean) (defaults to: true) —

    Render the RECEIVED block

Returns:

  • (String) —

    Formatted display of raw inputs



686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
 
# File 'lib/canon/diff_formatter.rb', line 686

def format_raw_inputs(raw1, raw2, show_expected: true, show_received: true)
  return "" if raw1.nil? || raw2.nil?
  return "" unless show_expected || show_received

  output = []
  output << ""
  output << colorize("=== ORIGINAL INPUTS (Raw) ===", :cyan, :bold)
  output << ""

  if show_expected
    output << colorize("EXPECTED:", :yellow, :bold)
    output << ("-" * 70)
    output << raw1
    output << ""
  end

  if show_received
    output << colorize("RECEIVED:", :yellow, :bold)
    output << ("-" * 70)
    output << raw2
    output << ""
  end

  output << ""
  output.join("\n")
end