Class: Uniword::Accessibility::Rules::ContrastRatioRule

Inherits:
AccessibilityRule show all
Defined in:
lib/uniword/accessibility/rules/contrast_ratio_rule.rb

Overview

Contrast Ratio Rule - WCAG 1.4.3 Contrast (Minimum)

Responsibility: Check text/background contrast ratios Single Responsibility: Contrast ratio validation only

WCAG 1.4.3 Level AA: Minimum contrast ratio of 4.5:1

Instance Attribute Summary

Attributes inherited from AccessibilityRule

#config, #level, #rule_id, #wcag_criterion

Instance Method Summary collapse

Methods inherited from AccessibilityRule

#enabled?, #initialize

Constructor Details

This class inherits a constructor from Uniword::Accessibility::AccessibilityRule

Instance Method Details

#check(_document) ⇒ Array<AccessibilityViolation>

Check document contrast ratios

Parameters:

  • document (Document) —

    Document to check

Returns:



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# File 'lib/uniword/accessibility/rules/contrast_ratio_rule.rb', line 17

def check(_document)
  []

  # Contrast ratio checking requires color analysis
  # This is a placeholder implementation
  # Actual implementation would check:
  # - Text color vs background color
  # - Minimum ratio of 4.5:1 for normal text (AA)
  # - Minimum ratio of 3:1 for large text (AA)
  # - Higher ratios for AAA compliance
end