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Better handling of bboxes in mfrac, msubsup, munderover, mspace.

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This commit is contained in:
Davide P. Cervone 2015-03-07 10:54:46 -05:00
parent 61db5330a7
commit c502910eb7
1 changed files with 27 additions and 33 deletions
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60
unpacked/jax/output/CommonHTML/jax.js
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@ -966,7 +966,7 @@
h = CHTML.length2em(values.height),
d = CHTML.length2em(values.depth);
var bbox = this.CHTML;
bbox.w = w; bbox.h = h; bbox.d = d;
bbox.w = bbox.r = w; bbox.h = bbox.t = h; bbox.d = bbox.b = d; bbox.l = 0;
if (w < 0) {node.style.marginRight = CHTML.Em(w); w = 0}
node.style.width = CHTML.Em(w);
node.style.height = CHTML.Em(h+d);
@ -980,7 +980,7 @@
node = this.CHTMLdefaultNode(node,{childNodes:"mjx-block", forceChild:true});
var child = node.firstChild, cbox = this.CHTMLbboxFor(0);
node = HTML.addElement(node,"mjx-block");
node.appendChild(child); HTML.addElement(child,"mjx-box"); // force box be in text mode
node.appendChild(child); HTML.addElement(child,"mjx-box"); // force box to be in text mode
var values = this.getValues("width","height","depth","lspace","voffset");
var dimen, x = 0, y = 0, w = cbox.w, h = cbox.h, d = cbox.d;
if (values.width !== "") {
@ -1164,13 +1164,12 @@
z2 = CHTML.TEX.big_op_spacing3;
k = Math.max(z1,z2-Math.max(0,scale*obox.d));
}
obox.x += delta/2;
obox.x += delta/2; obox.y = BBOX.h + k + z3;
//
// Position the overscript
//
if (k) over.style.paddingBottom = CHTML.Em(k/scale);
if (z3) over.style.paddingTop = CHTML.Em(z3/scale);
BBOX.h += scale*(obox.h+obox.d) + k + z3;
return stack;
},
//
@ -1207,35 +1206,34 @@
z2 = CHTML.TEX.big_op_spacing4;
k = Math.max(z1,z2-scale*ubox.h);
}
ubox.x = -delta/2;
ubox.x = -delta/2; ubox.y = -(BBOX.d + k + z3 + scale*ubox.h);
//
// Position the overscript
//
if (k) under.style.paddingTop = CHTML.Em(k/scale);
if (z3) under.style.paddingBottom = CHTML.Em(z3/scale);
BBOX.d += scale*(ubox.h+ubox.d) + z3 + k;
},
//
// Center boxes horizontally, taking offsets into account
// ### FIXME: handle BBOX.l and BBOX.r
//
CHTMLplaceBoxes: function (base,under,over,values,boxes) {
var BBOX = this.CHTML, W = BBOX.w, i, m = boxes.length;
boxes[this.base].x = 0; var dx = 0;
var W = this.CHTML.w, i, m = boxes.length;
var BBOX = this.CHTML = CHTML.zeroBBox();
boxes[this.base].x = boxes[this.base].y = 0; var dx = BIGDIMEN;
for (i = 0; i < m; i++) {
var SCALE = (i === this.base ? 1 : i === this.over ? values.oscale : values.uscale);
var w = SCALE*(boxes[i].w + (boxes[i].L||0) + (boxes[i].R||0));
boxes[i].x += (W-w)/2;
if (w + boxes[i].x > BBOX.w) BBOX.w = w + boxes[i].x;
if (boxes[i].x < dx) dx = boxes[i].x;
}
if (dx) BBOX.w += -dx;
for (i = 0; i < m; i++) {
if (boxes[i].x + dx) {
var node = (i === this.base ? base : i === this.over ? over : under);
var SCALE = (i === this.base ? 1 : i === this.over ? values.oscale : values.uscale);
node.style.paddingLeft = CHTML.Em((boxes[i].x+dx)/SCALE);
if (boxes[i].x - dx) {
var node = (i === this.base ? base : i === this.over ? over : under);
node.style.paddingLeft = CHTML.Em((boxes[i].x-dx)/SCALE);
}
CHTML.combineBBoxes(BBOX,boxes[i],boxes[i].x-dx,boxes[i].y,SCALE)
}
}
});
@ -1272,10 +1270,10 @@
//
// Get the bounding boxes and maximum width of scripts
//
var boxes = [], BBOX = this.CHTML;
var boxes = [], BBOX = this.CHTML = CHTML.emptyBBox();
for (var i = 0, m = this.data.length; i < m; i++) boxes[i] = this.CHTMLbboxFor(i);
var bbox = boxes[this.base], subbox = boxes[this.sub], supbox = boxes[this.sup];
BBOX.w = bbox.w; BBOX.h = bbox.h; BBOX.d = bbox.d; // modified below
CHTML.combineBBoxes(BBOX,bbox,0,0,1);
//
// Get initial values for parameters
//
@ -1297,14 +1295,13 @@
//
// Add the super- and subscripts
//
var x = BBOX.w; subbox.w += s; supbox.w += s;
if (!sup) {
if (sub) {
v = Math.max(v,CHTML.TEX.sub1,sscale*subbox.h-(4/5)*ex,values.subscriptshift);
sub.style.verticalAlign = CHTML.Em(-v/sscale);
sub.style.paddingRight = CHTML.Em(s/sscale);
BBOX.w += sscale*(subbox.w + (subbox.L||0) + (subbox.R||0)) + s;
BBOX.h = Math.max(BBOX.h,sscale*subbox.h-v);
BBOX.d = Math.max(BBOX.d,sscale*subbox.d+v);
CHTML.combineBBoxes(BBOX,subbox,x,-v,sscale);
}
} else {
if (!sub) {
@ -1313,9 +1310,7 @@
sup.style.verticalAlign = CHTML.Em(u/sscale);
sup.style.paddingLeft = CHTML.Em(delta/sscale);
sup.style.paddingRight = CHTML.Em(s/sscale);
BBOX.w += sscale*(supbox.w + (supbox.L||0) + (supbox.R||0)) + s + delta;
BBOX.h = Math.max(BBOX.h,sscale*supbox.h+u);
BBOX.d = Math.max(BBOX.d,sscale*supbox.d-u);
CHTML.combineBBoxes(BBOX,supbox,x+delta,u,sscale);
} else {
v = Math.max(v,CHTML.TEX.sub2);
var t = CHTML.TEX.rule_thickness;
@ -1331,14 +1326,11 @@
sup.style.paddingLeft = CHTML.Em(delta/sscale);
sup.style.paddingRight = CHTML.Em(s/sscale);
stack.style.verticalAlign = CHTML.Em(-v);
BBOX.w += Math.max(
sscale*(supbox.w + (supbox.L||0) + (supbox.R||0)) + s + delta,
sscale*(subbox.w + (subbox.L||0) + (subbox.R||0)) + s
);
BBOX.h = Math.max(BBOX.h,sscale*supbox.h+u,sscale*subbox.h-v);
BBOX.d = Math.max(BBOX.d,sscale*supbox.d-u,sscale*subbox.d+v);
CHTML.combineBBoxes(BBOX,supbox,x+delta,u,sscale);
CHTML.combineBBoxes(BBOX,subbox,x,-v,sscale);
}
}
CHTML.cleanBBox(BBOX);
return node;
}
});
@ -1377,7 +1369,7 @@
// Get the bounding boxes for the parts, and determine the placement
// of the numerator and denominator
//
var nbox = this.CHTMLbboxFor(0), dbox = this.CHTMLbboxFor(1), bbox = this.CHTML;
var nbox = this.CHTMLbboxFor(0), dbox = this.CHTMLbboxFor(1);
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 t = values.linethickness, p,q, u,v;
@ -1399,14 +1391,16 @@
var rule = HTML.Element("mjx-row",{},[["mjx-cell",{},[["mjx-line"]]]]);
num.parentNode.appendChild(rule); rule = rule.firstChild.firstChild;
rule.style.borderTop = CHTML.Em(t)+" solid";
num.firstChild.className += " MJXc-fpad";
denom.firstChild.className += " MJXc-fpad";
num.firstChild.className += " MJXc-fpad"; nbox.L = nbox.R = .1;
denom.firstChild.className += " MJXc-fpad"; dbox.L = dbox.R = .1;
}
//
// Determine the new bounding box and place the parts
//
bbox.w = sscale*Math.max(nbox.w,dbox.w);
bbox.h = sscale*nbox.h+u; bbox.d = sscale*dbox.d+v;
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.firstChild.style.paddingBottom = CHTML.Em(u);
if (v > 0) denom.firstChild.style.paddingTop = CHTML.Em(v);
@ -1415,7 +1409,7 @@
// (TeXBook pg 150 and Appendix G rule 15e)
//
if (!this.texWithDelims && !this.useMMLspacing)
bbox.L = bbox.R = CHTML.TEX.nulldelimiterspace;
this.CHTML.L = this.CHTML.R = CHTML.TEX.nulldelimiterspace;
this.CHTMLhandleSpace(node);
//
// Return the completed fraction