Preserve whitespace around inline <ruby> (#905)

also:
* Preserve whitespace inside <rp> tag (to buffer parentheses for very
old browsers)
* Preserve whitespace around inline <rtc> tags
* Mark <rb> as valid HTML

fixes #904

Author: YodasWs

src/htmlminifier.js

@@ -67,9 +67,9 @@ function collapseWhitespace(str, options, trimLeft, trimRight, collapseAll) {
 
 var createMapFromString = utils.createMapFromString;
 // non-empty tags that will maintain whitespace around them
-var inlineTags = createMapFromString('a,abbr,acronym,b,bdi,bdo,big,button,cite,code,del,dfn,em,font,i,ins,kbd,label,mark,math,nobr,object,q,rt,rp,s,samp,select,small,span,strike,strong,sub,sup,svg,textarea,time,tt,u,var');
+var inlineTags = createMapFromString('a,abbr,acronym,b,bdi,bdo,big,button,cite,code,del,dfn,em,font,i,ins,kbd,label,mark,math,nobr,object,q,rp,rt,rtc,ruby,s,samp,select,small,span,strike,strong,sub,sup,svg,textarea,time,tt,u,var');
 // non-empty tags that will maintain whitespace within them
-var inlineTextTags = createMapFromString('a,abbr,acronym,b,big,del,em,font,i,ins,kbd,mark,nobr,s,samp,small,span,strike,strong,sub,sup,time,tt,u,var');
+var inlineTextTags = createMapFromString('a,abbr,acronym,b,big,del,em,font,i,ins,kbd,mark,nobr,rp,s,samp,small,span,strike,strong,sub,sup,time,tt,u,var');
 // self-closing tags that will maintain whitespace around them
 var selfClosingInlineTags = createMapFromString('comment,img,input,wbr');
 
@@ -395,7 +395,7 @@ var topLevelTags = createMapFromString('html,head,body');
 var compactTags = createMapFromString('html,body');
 var looseTags = createMapFromString('head,colgroup,caption');
 var trailingTags = createMapFromString('dt,thead');
-var htmlTags = createMapFromString('a,abbr,acronym,address,applet,area,article,aside,audio,b,base,basefont,bdi,bdo,bgsound,big,blink,blockquote,body,br,button,canvas,caption,center,cite,code,col,colgroup,command,content,data,datalist,dd,del,details,dfn,dialog,dir,div,dl,dt,element,em,embed,fieldset,figcaption,figure,font,footer,form,frame,frameset,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,image,img,input,ins,isindex,kbd,keygen,label,legend,li,link,listing,main,map,mark,marquee,menu,menuitem,meta,meter,multicol,nav,nobr,noembed,noframes,noscript,object,ol,optgroup,option,output,p,param,picture,plaintext,pre,progress,q,rp,rt,rtc,ruby,s,samp,script,section,select,shadow,small,source,spacer,span,strike,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,tt,u,ul,var,video,wbr,xmp');
+var htmlTags = createMapFromString('a,abbr,acronym,address,applet,area,article,aside,audio,b,base,basefont,bdi,bdo,bgsound,big,blink,blockquote,body,br,button,canvas,caption,center,cite,code,col,colgroup,command,content,data,datalist,dd,del,details,dfn,dialog,dir,div,dl,dt,element,em,embed,fieldset,figcaption,figure,font,footer,form,frame,frameset,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,image,img,input,ins,isindex,kbd,keygen,label,legend,li,link,listing,main,map,mark,marquee,menu,menuitem,meta,meter,multicol,nav,nobr,noembed,noframes,noscript,object,ol,optgroup,option,output,p,param,picture,plaintext,pre,progress,q,rb,rp,rt,rtc,ruby,s,samp,script,section,select,shadow,small,source,spacer,span,strike,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,tt,u,ul,var,video,wbr,xmp');
 
 function canRemoveParentTag(optionalStartTag, tag) {
   switch (optionalStartTag) {

tests/minifier.js

@@ -207,8 +207,9 @@ QUnit.test('space normalization around text', function(assert) {
     assert.equal(minify('<div>foo <' + el + '> baz </' + el + '>bar</div>', { collapseWhitespace: true }), '<div>foo <' + el + '>baz </' + el + '>bar</div>');
     assert.equal(minify('<div>foo<' + el + '> baz </' + el + '> bar</div>', { collapseWhitespace: true }), '<div>foo<' + el + '> baz </' + el + '>bar</div>');
   });
+  // Don't trim whitespace around element, but do trim within
   [
-    'bdi', 'bdo', 'button', 'cite', 'code', 'dfn', 'math', 'q', 'rt', 'rp', 'svg'
+    'bdi', 'bdo', 'button', 'cite', 'code', 'dfn', 'math', 'q', 'rt', 'rtc', 'ruby', 'svg'
   ].forEach(function(el) {
     assert.equal(minify('foo <' + el + '>baz</' + el + '> bar', { collapseWhitespace: true }), 'foo <' + el + '>baz</' + el + '> bar');
     assert.equal(minify('foo<' + el + '>baz</' + el + '>bar', { collapseWhitespace: true }), 'foo<' + el + '>baz</' + el + '>bar');