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multiline.js

multiline.js 14 KB
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  1. /*
    2. 

  2.  *  /MathJax/jax/output/HTML-CSS/autoload/multiline.js
    3. 

  3.  *
    4. 

  4.  *  Copyright (c) 2009-2017 The MathJax Consortium
    5. 

  5.  *
    6. 

  6.  *  Licensed under the Apache License, Version 2.0 (the "License");
    7. 

  7.  *  you may not use this file except in compliance with the License.
    8. 

  8.  *  You may obtain a copy of the License at
    9. 

  9.  *
    10. 

  10.  *      http://www.apache.org/licenses/LICENSE-2.0
    11. 

  11.  *
    12. 

  12.  *  Unless required by applicable law or agreed to in writing, software
    13. 

  13.  *  distributed under the License is distributed on an "AS IS" BASIS,
    14. 

  14.  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15. 

  15.  *  See the License for the specific language governing permissions and
    16. 

  16.  *  limitations under the License.
    17. 

  17.  */
    18. 

  18. 

  19. MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function(){var d="2.7.2";var a=MathJax.ElementJax.mml,b=MathJax.OutputJax["HTML-CSS"];var e={newline:0,nobreak:1000000,goodbreak:[-200],badbreak:[+200],auto:[0],toobig:800,nestfactor:400,spacefactor:-100,spaceoffset:2,spacelimit:1,fence:500,close:500};var c={linebreakstyle:"after"};a.mbase.Augment({HTMLlinebreakPenalty:e,HTMLmultiline:function(n){var o=this;while(o.inferred||(o.parent&&o.parent.type==="mrow"&&o.isEmbellished())){o=o.parent}var l=((o.type==="math"&&o.Get("display")==="block")||o.type==="mtd");o.isMultiline=true;var p=this.getValues("linebreak","linebreakstyle","lineleading","linebreakmultchar","indentalign","indentshift","indentalignfirst","indentshiftfirst","indentalignlast","indentshiftlast");if(p.linebreakstyle===a.LINEBREAKSTYLE.INFIXLINEBREAKSTYLE){p.linebreakstyle=this.Get("infixlinebreakstyle")}p.lineleading=b.length2em(p.lineleading,1,0.5);this.HTMLremoveColor(n);var m=b.createStack(n);this.HTMLgetScale();var f={n:0,Y:0,scale:this.scale||1,isTop:l,values:{},VALUES:p},k=this.HTMLgetAlign(f,{}),h=this.HTMLgetShift(f,{},k),g=[],i={index:[],penalty:e.nobreak,w:0,W:h,shift:h,scanW:h,nest:0},j=false;while(this.HTMLbetterBreak(i,f)&&(i.scanW>=b.linebreakWidth||i.penalty===e.newline)){this.HTMLaddLine(m,g,i.index,f,i.values,j);g=i.index.slice(0);j=true;k=this.HTMLgetAlign(f,i.values);h=this.HTMLgetShift(f,i.values,k);if(k===a.INDENTALIGN.CENTER){h=0}i.W=i.shift=i.scanW=h;i.penalty=e.nobreak}f.isLast=true;this.HTMLaddLine(m,g,[],f,c,j);if(l){m.style.width="100%";if(o.type==="math"){n.bbox.width="100%"}}this.HTMLhandleSpace(n);this.HTMLhandleColor(n);n.bbox.isMultiline=true;return n},HTMLbetterBreak:function(h,f){if(this.isToken){return false}if(this.isEmbellished()){h.embellished=this;return this.CoreMO().HTMLbetterBreak(h,f)}if(this.linebreakContainer){return false}var p=h.index.slice(0),n=h.index.shift(),l=this.data.length,k,q,j,o=(h.index.length>0),g=false;if(n==null){n=-1}if(!o){n++;h.W+=h.w;h.w=0}j=h.scanW=h.W;h.nest++;while(n<l&&h.scanW<1.33*b.linebreakWidth){if(this.data[n]){if(this.data[n].HTMLbetterBreak(h,f)){g=true;p=[n].concat(h.index);k=h.W;q=h.w;if(h.penalty===e.newline){h.index=p;if(h.nest){h.nest--}return true}}j=(o?h.scanW:this.HTMLaddWidth(n,h,j))}h.index=[];n++;o=false}if(h.nest){h.nest--}h.index=p;if(g){h.W=k;h.w=q}return g},HTMLaddWidth:function(f,j,h){if(this.data[f]){var g=this.data[f].HTMLspanElement();h+=g.bbox.w;if(g.style.paddingLeft){h+=b.unEm(g.style.paddingLeft)}if(g.style.paddingRight){h+=b.unEm(g.style.paddingRight)}j.W=j.scanW=h;j.w=0}return h},HTMLaddLine:function(n,g,j,f,o,l){line=b.createBox(n);line.bbox=this.HTMLemptyBBox({});f.first=l;f.last=true;this.HTMLmoveLine(g,j,line,f,o);this.HTMLcleanBBox(line.bbox);var m=this.HTMLgetAlign(f,o),h=this.HTMLgetShift(f,o,m);if(f.n>0){var k=b.FONTDATA.baselineskip*f.scale;var i=(f.values.lineleading==null?f.VALUES:f.values).lineleading*f.scale;f.Y-=Math.max(k,f.d+line.bbox.h+i)}b.alignBox(line,m,f.Y,h);f.d=line.bbox.d;f.values=o;f.n++},HTMLgetAlign:function(i,f){var j=f,g=i.values,h=i.VALUES,k;if(i.n===0){k=j.indentalignfirst||g.indentalignfirst||h.indentalignfirst}else{if(i.isLast){k=g.indentalignlast||h.indentalignlast}else{k=g.indentalign||h.indentalign}}if(k===a.INDENTALIGN.INDENTALIGN){k=g.indentalign||h.indentalign}if(k===a.INDENTALIGN.AUTO){k=(i.isTop?this.displayAlign:a.INDENTALIGN.LEFT)}return k},HTMLgetShift:function(k,h,m){var l=h,i=k.values,j=k.VALUES,g;if(k.n===0){g=l.indentshiftfirst||i.indentshiftfirst||j.indentshiftfirst}else{if(k.isLast){g=i.indentshiftlast||j.indentshiftlast}else{g=i.indentshift||j.indentshift}}if(g===a.INDENTSHIFT.INDENTSHIFT){g=i.indentshift||j.indentshift}if(g==="auto"||g===""){g="0"}g=b.length2em(g,1,b.cwidth);if(k.isTop&&this.displayIndent!=="0"){var f=b.length2em(this.displayIndent,1,b.cwidth);g+=(m===a.INDENTALIGN.RIGHT?-f:f)}return g},HTMLmoveLine:function(o,f,l,n,g){var k=o[0],h=f[0];if(k==null){k=-1}if(h==null){h=this.data.length-1}if(k===h&&o.length>1){this.data[k].HTMLmoveSlice(o.slice(1),f.slice(1),l,n,g,"paddingLeft")}else{var m=n.last;n.last=false;while(k<h){if(this.data[k]){if(o.length<=1){this.data[k].HTMLmoveSpan(l,n,g)}else{this.data[k].HTMLmoveSlice(o.slice(1),[],l,n,g,"paddingLeft")}}k++;n.first=false;o=[]}n.last=m;if(this.data[k]){if(f.length<=1){this.data[k].HTMLmoveSpan(l,n,g)}else{this.data[k].HTMLmoveSlice([],f.slice(1),l,n,g,"paddingRight")}}}},HTMLmoveSlice:function(g,j,o,f,p,l){this.HTMLremoveColor();var m=this.HTMLcreateSliceSpan(o);this.HTMLmoveLine(g,j,m,f,p);m.style[l]="";this.HTMLcombineBBoxes(m,o.bbox);this.HTMLcleanBBox(m.bbox);if(j.length===0){o=this.HTMLspanElement();var k=o;if(this.href){o=o.parentNode}o.parentNode.removeChild(o);o.nextMathJaxSpan.id=k.id;var h=0;while((k=k.nextMathJaxSpan)){if(k.nodeName.toLowerCase()==="a"){k=k.firstChild}var i=this.HTMLhandleColor(k);if(i){i.id+="-MathJax-Continue-"+h;h++}}}return m},HTMLcreateSliceSpan:function(g){var j=this.HTMLspanElement(),i=0;if(this.href){j=j.parentNode}var f=j;while(f.nextMathJaxSpan){f=f.nextMathJaxSpan;i++}var h=j.cloneNode(false);f.nextMathJaxSpan=h;h.nextMathJaxSpan=null;h.id+="-MathJax-Continue-"+i;h.bbox=this.HTMLemptyBBox({});return g.appendChild(h)},HTMLmoveSpan:function(f,j,h){if(!(j.first||j.last)||(j.first&&j.values.linebreakstyle===a.LINEBREAKSTYLE.BEFORE)||(j.last&&h.linebreakstyle===a.LINEBREAKSTYLE.AFTER)){var g=document.getElementById("MathJax-Color-"+this.spanID+b.idPostfix);if(g){f.appendChild(g)}var i=this.HTMLspanElement();if(this.href){i=i.parentNode}f.appendChild(i);if(j.last){i.style.paddingRight=""}if(j.first||j.nextIsFirst){i.style.paddingLeft="";if(g){this.HTMLremoveColor(i);this.HTMLhandleColor(i)}}if(j.first&&i.bbox.w===0){j.nextIsFirst=true}else{delete j.nextIsFirst}this.HTMLcombineBBoxes(this,f.bbox)}}});a.mfenced.Augment({HTMLbetterBreak:function(h,f){var t=h.index.slice(0),r=h.index.shift(),o=this.data.length,n,u,l,s=(h.index.length>0),g=false;if(r==null){r=-1}if(!s){r++;h.W+=h.w;h.w=0}l=h.scanW=h.W;h.nest++;if(!this.dataI){this.dataI=[];if(this.data.open){this.dataI.push("open")}if(o){this.dataI.push(0)}for(var q=1;q<o;q++){if(this.data["sep"+q]){this.dataI.push("sep"+q)}this.dataI.push(q)}if(this.data.close){this.dataI.push("close")}}o=this.dataI.length;while(r<o&&h.scanW<1.33*b.linebreakWidth){var p=this.dataI[r];if(this.data[p]){if(this.data[p].HTMLbetterBreak(h,f)){g=true;t=[r].concat(h.index);n=h.W;u=h.w;if(h.penalty===e.newline){h.index=t;if(h.nest){h.nest--}return true}}l=(s?h.scanW:this.HTMLaddWidth(r,h,l))}h.index=[];r++;s=false}if(h.nest){h.nest--}h.index=t;if(g){h.W=n;h.w=u}return g},HTMLmoveLine:function(g,l,o,f,q){var n=g[0],m=l[0];if(n==null){n=-1}if(m==null){m=this.dataI.length-1}if(n===m&&g.length>1){this.data[this.dataI[n]].HTMLmoveSlice(g.slice(1),l.slice(1),o,f,q,"paddingLeft")}else{var p=f.last;f.last=false;var h=this.dataI[n];while(n<m){if(this.data[h]){if(g.length<=1){this.data[h].HTMLmoveSpan(o,f,q)}else{this.data[h].HTMLmoveSlice(g.slice(1),[],o,f,q,"paddingLeft")}}n++;h=this.dataI[n];f.first=false;g=[]}f.last=p;if(this.data[h]){if(l.length<=1){this.data[h].HTMLmoveSpan(o,f,q)}else{this.data[h].HTMLmoveSlice([],l.slice(1),o,f,q,"paddingRight")}}}}});a.msubsup.Augment({HTMLbetterBreak:function(h,f){if(!this.data[this.base]){return false}var n=h.index.slice(0),l=h.index.shift(),k,o,j,m=(h.index.length>0),g=false;if(!m){h.W+=h.w;h.w=0}j=h.scanW=h.W;if(l==null){this.HTMLbaseW=this.data[this.base].HTMLspanElement().bbox.w;this.HTMLdw=this.HTMLspanElement().bbox.w-this.HTMLbaseW}if(this.data[this.base].HTMLbetterBreak(h,f)){g=true;n=[this.base].concat(h.index);k=h.W;o=h.w;if(h.penalty===e.newline){g=m=true}}if(!m){this.HTMLaddWidth(this.base,h,j)}h.scanW+=this.HTMLdw;h.W=h.scanW;h.index=[];if(g){h.W=k;h.w=o;h.index=n}return g},HTMLmoveLine:function(m,g,j,l,h){if(this.data[this.base]){if(m.length>1){this.data[this.base].HTMLmoveSlice(m.slice(1),g.slice(1),j,l,h,"paddingLeft")}else{if(g.length<=1){this.data[this.base].HTMLmoveSpan(j,l,h)}else{this.data[this.base].HTMLmoveSlice([],g.slice(1),j,l,h,"paddingRight")}}}if(g.length===0){var i=this.data[this.sup]||this.data[this.sub];if(i&&this.HTMLnotEmpty(i)){var k=i.HTMLspanElement().parentNode;if(i.href){k=k.parentNode}var f=k.parentNode;if(this.data[this.base]){f.removeChild(f.firstChild)}for(k=f.firstChild;k;k=k.nextSibling){k.style.left=b.Em(b.unEm(k.style.left)-this.HTMLbaseW)}f.bbox.w-=this.HTMLbaseW;f.style.width=b.Em(f.bbox.w);this.HTMLcombineBBoxes(f,j.bbox);j.appendChild(f)}}}});a.mmultiscripts.Augment({HTMLbetterBreak:function(j,g){if(!this.data[this.base]){return false}var n=j.index.slice(0);j.index.shift();var l,o,k,m=(j.index.length>0),i=false;if(!m){j.W+=j.w;j.w=0}j.scanW=j.W;var p=this.HTMLspanElement().bbox,h=this.data[this.base].HTMLspanElement().bbox;var f=p.w-h.w;j.scanW+=p.dx;k=j.scanW;if(this.data[this.base].HTMLbetterBreak(j,g)){i=true;n=[this.base].concat(j.index);l=j.W;o=j.w;if(j.penalty===e.newline){i=m=true}}if(!m){this.HTMLaddWidth(this.base,j,k)}j.scanW+=f;j.W=j.scanW;j.index=[];if(i){j.W=l;j.w=o;j.index=n}return i},HTMLmoveLine:function(h,i,o,g,p){var m=this.HTMLspanElement(),k=m.bbox,n=m.firstChild,f={};if(b.msiePaddingWidthBug){n=n.nextSibling}var l=n.firstChild;while(l){if(l.bbox&&l.bbox.name){f[l.bbox.name]=l}l=l.nextSibling}if(h.length<1){if(f.presub||f.presup){var j=b.createStack(o);if(f.presup){b.addBox(j,f.presup);b.placeBox(f.presup,k.dx-f.presup.bbox.w,k.u)}if(f.presub){b.addBox(j,f.presub);b.placeBox(f.presub,k.dx+k.delta-f.presub.bbox.w,-k.v)}this.HTMLcombineBBoxes(j,o.bbox);o.appendChild(j);j.style.width=b.Em(k.dx)}}if(this.data[this.base]){if(h.length>1){this.data[this.base].HTMLmoveSlice(h.slice(1),i.slice(1),o,g,p,"paddingLeft")}else{if(i.length<=1){this.data[this.base].HTMLmoveSpan(o,g,p)}else{this.data[this.base].HTMLmoveSlice([],i.slice(1),o,g,p,"paddingRight")}}}if(i.length===0){if(this.data[this.base]){n.removeChild(n.firstChild)}for(l=n.firstChild;l;l=l.nextSibling){l.style.left=b.Em(b.unEm(l.style.left)-k.px)}n.bbox.w-=k.px;n.style.width=b.Em(n.bbox.w);this.HTMLcombineBBoxes(n,o.bbox);o.appendChild(n)}}});a.mo.Augment({HTMLbetterBreak:function(h,f){if(h.values&&h.values.id===this.spanID){return false}var p=this.getValues("linebreak","linebreakstyle","lineleading","linebreakmultchar","indentalign","indentshift","indentalignfirst","indentshiftfirst","indentalignlast","indentshiftlast","texClass","fence");if(p.linebreakstyle===a.LINEBREAKSTYLE.INFIXLINEBREAKSTYLE){p.linebreakstyle=this.Get("infixlinebreakstyle")}if(p.texClass===a.TEXCLASS.OPEN){h.nest++}if(p.texClass===a.TEXCLASS.CLOSE&&h.nest){h.nest--}var i=h.scanW,j=(h.embellished||this);delete h.embellished;var n=j.HTMLspanElement(),o=n.bbox.w;if(n.style.paddingLeft){o+=b.unEm(n.style.paddingLeft)}if(p.linebreakstyle===a.LINEBREAKSTYLE.AFTER){i+=o;o=0}if(i-h.shift===0&&p.linebreak!==a.LINEBREAK.NEWLINE){return false}var k=b.linebreakWidth-i;if(f.n===0&&(p.indentshiftfirst!==f.VALUES.indentshiftfirst||p.indentalignfirst!==f.VALUES.indentalignfirst)){var l=this.HTMLgetAlign(f,p),g=this.HTMLgetShift(f,p,l);k+=(h.shift-g)}var m=Math.floor(k/b.linebreakWidth*1000);if(m<0){m=e.toobig-3*m}if(p.fence){m+=e.fence}if((p.linebreakstyle===a.LINEBREAKSTYLE.AFTER&&p.texClass===a.TEXCLASS.OPEN)||p.texClass===a.TEXCLASS.CLOSE){m+=e.close}m+=h.nest*e.nestfactor;var q=e[p.linebreak||a.LINEBREAK.AUTO];if(!MathJax.Object.isArray(q)){if(k>=0){m=q*h.nest}}else{m=Math.max(1,m+q[0]*h.nest)}if(m>=h.penalty){return false}h.penalty=m;h.values=p;h.W=i;h.w=o;p.lineleading=b.length2em(p.lineleading,1,f.VALUES.lineleading);p.id=this.spanID;return true}});a.mspace.Augment({HTMLbetterBreak:function(g,f){if(g.values&&g.values.id===this.spanID){return false}var n=this.getValues("linebreak");var k=n.linebreak;if(!k||this.hasDimAttr()){k=a.LINEBREAK.AUTO}var h=g.scanW,l=this.HTMLspanElement(),m=l.bbox.w;if(l.style.paddingLeft){m+=b.unEm(l.style.paddingLeft)}if(h-g.shift===0){return false}var i=b.linebreakWidth-h;var j=Math.floor(i/b.linebreakWidth*1000);if(j<0){j=e.toobig-3*j}j+=g.nest*e.nestfactor;var o=e[k];if(k===a.LINEBREAK.AUTO&&m>=e.spacelimit&&!this.mathbackground&&!this.background){o=[(m+e.spaceoffset)*e.spacefactor]}if(!MathJax.Object.isArray(o)){if(i>=0){j=o*g.nest}}else{j=Math.max(1,j+o[0]*g.nest)}if(j>=g.penalty){return false}g.penalty=j;g.values=n;g.W=h;g.w=m;n.lineleading=f.VALUES.lineleading;n.linebreakstyle="before";n.id=this.spanID;return true}});MathJax.Hub.Register.StartupHook("TeX mathchoice Ready",function(){a.TeXmathchoice.Augment({HTMLbetterBreak:function(g,f){return this.Core().HTMLbetterBreak(g,f)},HTMLmoveLine:function(j,f,h,i,g){return this.Core().HTMLmoveSlice(j,f,h,i,g)}})});a.maction.Augment({HTMLbetterBreak:function(g,f){return this.Core().HTMLbetterBreak(g,f)},HTMLmoveLine:function(j,f,h,i,g){return this.Core().HTMLmoveSlice(j,f,h,i,g)},HTMLmoveSlice:function(g,i,l,f,m,j){var o=document.getElementById("MathJax-HitBox-"+this.spanID+b.idPostfix);if(o){o.parentNode.removeChild(o)}var k=this.SUPER(arguments).HTMLmoveSlice.apply(this,arguments);if(i.length===0){l=this.HTMLspanElement();var h=0;while(l){o=this.HTMLhandleHitBox(l,"-Continue-"+h);l=l.nextMathJaxSpan;h++}}return k}});a.semantics.Augment({HTMLbetterBreak:function(g,f){return(this.data[0]?this.data[0].HTMLbetterBreak(g,f):false)},HTMLmoveLine:function(j,f,h,i,g){return(this.data[0]?this.data[0].HTMLmoveSlice(j,f,h,i,g):null)}});MathJax.Hub.Startup.signal.Post("HTML-CSS multiline Ready");MathJax.Ajax.loadComplete(b.autoloadDir+"/multiline.js")});
    20.