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Add bevelled fraction support

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This commit is contained in:
Davide P. Cervone 2015-03-14 18:40:58 -04:00
parent 35bd8e0acd
commit beabbc7a17
1 changed files with 46 additions and 27 deletions
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73
unpacked/jax/output/CommonHTML/jax.js
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@ -57,6 +57,7 @@
"mjx-numerator": {display:"block", "text-align":"center"}, "mjx-numerator": {display:"block", "text-align":"center"},
"mjx-denominator": {display:"block", "text-align":"center"}, "mjx-denominator": {display:"block", "text-align":"center"},
".MJXc-fpad": {"padding-left":".1em", "padding-right":".1em"}, ".MJXc-fpad": {"padding-left":".1em", "padding-right":".1em"},
".MJXc-bevelled > *": {display:"inline-block"},
"mjx-stack": {display:"inline-block"}, "mjx-stack": {display:"inline-block"},
"mjx-op": {display:"block"}, "mjx-op": {display:"block"},
@ -1753,35 +1754,53 @@
var nbox = this.CHTMLbboxFor(0), dbox = this.CHTMLbboxFor(1); var nbox = this.CHTMLbboxFor(0), dbox = this.CHTMLbboxFor(1);
values.linethickness = Math.max(0,CHTML.length2em(values.linethickness||"0",0)); values.linethickness = Math.max(0,CHTML.length2em(values.linethickness||"0",0));
var mt = CHTML.TEX.min_rule_thickness/CHTML.em/scale, a = CHTML.TEX.axis_height; var mt = CHTML.TEX.min_rule_thickness/CHTML.em/scale, a = CHTML.TEX.axis_height;
var t = values.linethickness, p,q, u,v; var t = values.linethickness, p,q, u,v;
if (isDisplay) {u = CHTML.TEX.num1; v = CHTML.TEX.denom1} if (values.bevelled) {
else {u = (t === 0 ? CHTML.TEX.num3 : CHTML.TEX.num2); v = CHTML.TEX.denom2} frac.className = "MJXc-bevelled";
if (t === 0) { // \atop var delta = (isDisplay ? .4 : .15);
p = Math.max((isDisplay ? 7 : 3) * CHTML.TEX.rule_thickness, 2*mt); // force to at least 2 px var H = sscale*Math.max(nbox.h+nbox.d,dbox.h+dbox.d) + 2*delta;
q = (u - nbox.d*sscale) - (dbox.h*sscale - v); var bevel = HTML.Element("mjx-bevel"); frac.insertBefore(bevel,denom);
if (q < p) {u += (p - q)/2; v += (p - q)/2} var bbox = CHTML.createDelimiter(bevel,0x2F,H);
frac.style.verticalAlign = CHTML.Em(-v); u = sscale*(nbox.d-nbox.h)/2+a+delta;
} else { // \over v = sscale*(dbox.d-dbox.h)/2+a-delta;
p = Math.max((isDisplay ? 3 : 0) * t, mt); // force to be at least 1px if (u) num.style.verticalAlign = CHTML.Em(u);
t = Math.max(t,mt); if (v) denom.style.verticalAlign = CHTML.Em(v);
q = (u - nbox.d*sscale) - (a + t/2); if (q < p) u += (p - q); bevel.style.marginLeft = bevel.style.marginRight = CHTML.Em(-delta/2);
q = (a - t/2) - (dbox.h*sscale - v); if (q < p) v += (p - q); this.CHTML = CHTML.emptyBBox();
frac.style.verticalAlign = CHTML.Em(t/2-v); CHTML.combineBBoxes(this.CHTML,nbox,0,u,sscale);
num.style.borderBottom = CHTML.Em(t)+" solid"; CHTML.combineBBoxes(this.CHTML,bbox,sscale*nbox.w-delta/2,0,sscale);
num.className += " MJXc-fpad"; nbox.L = nbox.R = .1; CHTML.combineBBoxes(this.CHTML,dbox,sscale*nbox.w+bbox.w-delta,v,sscale);
denom.className += " MJXc-fpad"; dbox.L = dbox.R = .1; CHTML.cleanBBox(this.CHTML);
} else {
if (isDisplay) {u = CHTML.TEX.num1; v = CHTML.TEX.denom1}
else {u = (t === 0 ? CHTML.TEX.num3 : CHTML.TEX.num2); v = CHTML.TEX.denom2}
if (t === 0) { // \atop
p = Math.max((isDisplay ? 7 : 3) * CHTML.TEX.rule_thickness, 2*mt); // force to at least 2 px
q = (u - nbox.d*sscale) - (dbox.h*sscale - v);
if (q < p) {u += (p - q)/2; v += (p - q)/2}
frac.style.verticalAlign = CHTML.Em(-v);
} else { // \over
p = Math.max((isDisplay ? 3 : 0) * t, mt); // force to be at least 1px
t = Math.max(t,mt);
q = (u - nbox.d*sscale) - (a + t/2); if (q < p) u += (p - q);
q = (a - t/2) - (dbox.h*sscale - v); if (q < p) v += (p - q);
frac.style.verticalAlign = CHTML.Em(t/2-v);
num.style.borderBottom = CHTML.Em(t)+" solid";
num.className += " MJXc-fpad"; nbox.L = nbox.R = .1;
denom.className += " MJXc-fpad"; dbox.L = dbox.R = .1;
}
//
// Determine the new bounding box and place the parts
//
this.CHTML = CHTML.emptyBBox();
CHTML.combineBBoxes(this.CHTML,nbox,0,u,sscale);
CHTML.combineBBoxes(this.CHTML,dbox,0,-v,sscale);
CHTML.cleanBBox(this.CHTML);
u -= sscale*nbox.d + a + t/2; v -= sscale*dbox.h - a + t/2;
if (u > 0) num.style.paddingBottom = CHTML.Em(u);
if (v > 0) denom.style.paddingTop = CHTML.Em(v);
} }
// //
// Determine the new bounding box and place the parts
//
this.CHTML = CHTML.emptyBBox();
CHTML.combineBBoxes(this.CHTML,nbox,0,u,sscale);
CHTML.combineBBoxes(this.CHTML,dbox,0,-v,sscale);
CHTML.cleanBBox(this.CHTML);
u -= sscale*nbox.d + a + t/2; v -= sscale*dbox.h - a + t/2;
if (u > 0) num.style.paddingBottom = CHTML.Em(u);
if (v > 0) denom.style.paddingTop = CHTML.Em(v);
//
// Add nulldelimiterspace around the fraction // Add nulldelimiterspace around the fraction
// (TeXBook pg 150 and Appendix G rule 15e) // (TeXBook pg 150 and Appendix G rule 15e)
// //