Algorithm for Text Wrapping Within a Shape

Question

I am looking for an algorithm to wrap text within a non-rectangular shape, preferably based on the Knuth and Plass algorithm. The hardest part of this is that the lines may

Answer 1

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text / html

    
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js

var text =  "Lorem ipsum dolor sit amet," // `string` , `array` 
, i = -1
, elem = document.querySelector("pre");
elem.innerText = elem.innerText.replace(/[^\n|\r|\t|\s+]/g, function() {
                   return text[++i] 
                 });

        Lorem ipsum do              lor sit amet,  
     consectetur adipisci         ng elit. Vivamus b
   landit nisl eu posuere s     uscipit. Etiam at quam
  sed nulla consequat finibu   s et eget ligula. Nam sit
 amet imperdiet eros. Ut a congue nibh. Sed ac arcu non r
isus commodo lobortis et at lorem. Pellentesque pulvinar v
enenatis pellentesque. Praesent sed pulvinar justo. Ut nec
 turpis lectus. Suspendisse porta ipsum orci, nec vestibul
um tellus luctus quis. Morbi eleifend vel nibh sed rutrum.
 Etiam feugiat, nunc et efficitur accumsan, quam magna lac
 inia neque, eu ullamcorper purus turpis eget urna. Etiam
   lacus mi, gravida vel mollis ut, viverra sed ipsum. M
   auris in augue turpis.Nulla facilisi. In tristique t
     ortor sit amet leo cursus, sit amet varius ligula
       sollicitudin. Mauris commodo et sapien id sce
        lerisque. Integer et diam eget arcu bibend
           um ornare a in tortor. Lorem ipsum do
              lor sit amet, consectetur adip
                 iscing elit. Aliquam veh
                    icula diam ac laor
                       eet tincidun
                         t. Integ
                           er se
                            d t
                             e

var text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus blandit nisl eu posuere suscipit. Etiam at quam sed nulla consequat finibus et eget ligula. Nam sit amet imperdiet eros. Ut a congue nibh. Sed ac arcu non risus commodo lobortis et at lorem. Pellentesque pulvinar venenatis pellentesque. Praesent sed pulvinar justo. Ut nec turpis lectus. Suspendisse porta ipsum orci, nec vestibulum tellus luctus quis. Morbi eleifend vel nibh sed rutrum. Etiam feugiat, nunc et efficitur accumsan, quam magna lacinia neque, eu ullamcorper purus turpis eget urna. Etiam lacus mi, gravida vel mollis ut, viverra sed ipsum. Mauris in augue turpis."

+ "Nulla facilisi. In tristique tortor sit amet leo cursus, sit amet varius ligula sollicitudin. Mauris commodo et sapien id scelerisque. Integer et diam eget arcu bibendum ornare a in tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam vehicula diam ac laoreet tincidunt. Integer sed tellus sit amet lacus bibendum tristique a a nulla. Quisque venenatis suscipit est eget ultricies. Quisque ac orci convallis, interdum enim quis, dictum justo. Phasellus tincidunt nisi vitae justo fringilla, sit amet pellentesque enim dictum. Duis porttitor convallis feugiat. Sed lectus massa, consectetur et vestibulum a, egestas ac eros. Proin mollis ligula tellus, a dignissim eros placerat sed. Donec vel blandit magna. Etiam quis tortor rhoncus, porta ante et, pretium mi."

+ "Vestibulum ut risus convallis, sagittis orci sed, faucibus erat. Aliquam maximus suscipit lectus, vel pellentesque enim dictum nec. Sed et ex id mauris finibus molestie. Aliquam erat volutpat. Etiam nec ultricies est. Aenean vitae mi id neque vulputate suscipit vel vitae ante. Nam sit amet mi diam. Phasellus efficitur faucibus viverra. Proin cursus purus et tortor dictum elementum. Nunc vehicula erat volutpat, rutrum metus bibendum, blandit sem."

+ "Nam eu ante eros. Sed pellentesque accumsan neque, eu vulputate lectus luctus ac. In hac habitasse platea dictumst. Nulla vitae dictum diam. Sed eget mauris in felis luctus luctus. Mauris volutpat lacus in est dignissim, sit amet venenatis ipsum laoreet. Phasellus semper id velit ut tristique. Proin dictum erat at mauris lacinia blandit. Ut scelerisque mi ex, ut pretium elit commodo sit amet. Praesent faucibus turpis tellus, ac vulputate felis aliquet eget. Ut est urna, dignissim nec risus sit amet, eleifend lacinia enim. Donec non massa in purus efficitur placerat. Donec accumsan neque elit, eget vulputate metus finibus quis. Ut interdum sem vel felis imperdiet pretium. Integer erat neque, bibendum id egestas nec, facilisis sed massa."

+ "Curabitur sit amet mattis odio. Mauris mattis turpis eu lectus eleifend, semper ultrices elit malesuada. Mauris fringilla arcu sed sem vehicula vulputate. Donec semper nisl ut urna bibendum, quis eleifend tortor commodo. Pellentesque vehicula est et neque vulputate accumsan. Duis faucibus sodales lacus et suscipit. Pellentesque tortor enim, pulvinar scelerisque pretium non, aliquam sed risus. Vestibulum aliquam dolor ipsum, eget pretium ante fermentum a. Donec semper lectus pulvinar tellus hendrerit sagittis. Nunc blandit sed ligula vel consequat. Etiam sed est quis nulla blandit blandit. Sed in enim pulvinar elit accumsan faucibus sed sodales lorem. Aenean ac efficitur arcu, sed fringilla lectus."

, i = -1;
var elem = document.querySelector("pre");
elem.innerText = elem.innerText.replace(/[^\n|\r|\t|\s+]/g, function() {
                   return text[++i] 
                 });

    
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