Module: Metanorma::Html::Concerns::SvgProcessing

Included in:
BaseRenderer
Defined in:
lib/metanorma/html/concerns/svg_processing.rb

Overview

SVG logo loading and normalization mixed into BaseRenderer. Logos ship as standalone SVG files; for inline embedding the xml prolog and leading comments are stripped, a CSS class is added, and width/height are normalized to the requested display height.

Instance Method Summary collapse

Instance Method Details

#load_logo_svg(filename, height: 32) ⇒ Object 



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# File 'lib/metanorma/html/concerns/svg_processing.rb', line 11

def load_logo_svg(filename, height: 32)
  path = theme.resolve_asset(filename) || File.join(BaseRenderer::LOGO_DIR, filename)
  return nil unless File.exist?(path)

  svg = File.read(path)
  svg = svg.sub(/\A<\?xml[^?]*\?>\s*/, "")
  svg = svg.sub(/\A\s*<!--.*?-->\s*/m, "")
  svg = svg.sub(/<svg\s/, '<svg class="header-logo" ')
  svg = if svg.match?(/<svg[^>]*\sheight="[^"]*"/)
          svg.sub(/(<svg[^>]*?)(\sheight="[^"]*")/,
                  "\\1 height=\"#{height}\"")
        else
          svg.sub(/(<svg\b)/, "\\1 height=\"#{height}\"")
        end
  svg.sub(/(<svg[^>]*?)\swidth="[^"]*"/, '\1')
rescue StandardError
  nil
end