// Inline SVG
//
// Returns encoded inline svg
//
// $svg - svg code
//
// ```stylus
// .foo
//     background-image _inlineSvg('<svg viewBox="0 0 90 30" width="30" height="30"><circle cx="15" cy="15" r="10" class="bounce1"/></svg>')
// ```
// will return
// ```css
// .foo {
//     background-image url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 90 30' width='30' height='30'%3E%3Ccircle cx='15' cy='15' r='10' class='bounce1'/%3E%3C/svg%3E");
// }
// ```
//
// Deprecated
//
// Styleguide: Mixins.Inline-SVG
_inlineSvg($svg)
    // Add missing namespace
    if not match('xmlns', $svg)
        $svg = replace('<svg', '<svg xmlns="http://www.w3.org/2000/svg"', $svg) // @stylint ignore

    // Chunk up string in order to avoid
    // "stack level too deep" error
    $encoded = ''
    $slice = 2000
    $index = 0
    $loops = ceil(length($svg) / $slice)

    for $i in 1..$loops
        $chunk = slice($svg, $index, $index + $slice - 1)

        // Encode
        $chunk = replace('"', "'", $chunk) // @stylint ignore
        $chunk = replace('%', '%25', $chunk)
        $chunk = replace('&', '%26', $chunk)
        $chunk = replace('#', '%23', $chunk)
        $chunk = replace('{', '%7B', $chunk)
        $chunk = replace('}', '%7D', $chunk)
        $chunk = replace('<', '%3C', $chunk)
        $chunk = replace('>', '%3E', $chunk)


        // The maybe list
        //
        // Keep size and compile time down
        // … only add on documented fail

        // $chunk = replace('|', '%7C', $chunk)
        // $chunk = replace('[', '%5B', $chunk)
        // $chunk = replace(']', '%5D', $chunk)
        // $chunk = replace('^', '%5E', $chunk)
        // $chunk = replace('`', '%60', $chunk)
        // $chunk = replace(';', '%3B', $chunk)
        // $chunk = replace('?', '%3F', $chunk)
        // $chunk = replace(':', '%3A', $chunk)
        // $chunk = replace('@', '%40', $chunk)
        // $chunk = replace('=', '%3D', $chunk)

        $encoded = $encoded+$chunk
        $index = $index + $slice

    return url(s('data:image/svg+xml,%s', unquote($encoded)))