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| #!/usr/bin/env raku | |
| my @void = <area base br col command embed hr img input keygen link meta param source track wbr>; | |
| grammar H { | |
| rule TOP { <block> } | |
| rule block { | |
| | '<' <tag> '>' <block>* '</' $<tag> '>' | |
| | '<' $<void>=[ @void '/'? ] '>' | |
| | <text> | |
| } | |
| token text { <-[<]>+ } | |
| token tag { <-[>]>+ } | |
| } | |
| my $width = 4; | |
| multi prettiest(Array $block, :$indent) { | |
| prettiest($_, :$indent ) for @$block; | |
| } | |
| multi prettiest(Match $/ where $<void>, :$indent) { | |
| put "<$<void>>".indent($indent); | |
| } | |
| multi prettiest(Match $/, :$indent = -$width) { | |
| put "<$_>".indent($indent) with $<tag>; | |
| put "$_".indent($indent) with $<text>; | |
| prettiest($_, :indent($indent + $width) ) with $<block>; | |
| put "</$_>".indent($indent) with $<tag>; | |
| } | |
| prettiest(H.parse( '<html><p>hi!<br>there!</p></html>' )); | |
| prettiest(H.parse( '<html><p>hi!<br/>there!</p></html>' )); |
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| <html> | |
| <p> | |
| hi! | |
| <br> | |
| there! | |
| </p> | |
| </html> | |
| <html> | |
| <p> | |
| hi! | |
| <br/> | |
| there! | |
| </p> | |
| </html> |
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