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/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*************************************************************
*
* MathJax/jax/output/SVG/autoload/mmultiscripts.js
*
* Implements the SVG output for <mmultiscripts> elements.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2011-2017 The MathJax Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
MathJax.Hub.Register.StartupHook("SVG Jax Ready",function () {
var VERSION = "2.7.1";
var MML = MathJax.ElementJax.mml,
SVG = MathJax.OutputJax.SVG;
MML.mmultiscripts.Augment({
toSVG: function (HW,D) {
this.SVGgetStyles();
var svg = this.SVG(), scale = this.SVGgetScale(svg); this.SVGhandleSpace(svg);
var base = (this.data[this.base] ? this.SVGdataStretched(this.base,HW,D) : SVG.BBOX.G().Clean());
var x_height = SVG.TeX.x_height * scale,
s = SVG.TeX.scriptspace * scale * .75; // FIXME: .75 can be removed when IC is right?
var BOX = this.SVGgetScripts(s);
var sub = BOX[0], sup = BOX[1], presub = BOX[2], presup = BOX[3];
var sscale = (this.data[1]||this).SVGgetScale();
var q = SVG.TeX.sup_drop * sscale, r = SVG.TeX.sub_drop * sscale;
var u = base.h - q, v = base.d + r, delta = 0, p;
if (base.ic) {delta = base.ic}
if (this.data[this.base] &&
(this.data[this.base].type === "mi" || this.data[this.base].type === "mo")) {
if (this.data[this.base].data.join("").length === 1 && base.scale === 1 &&
!base.stretched && !this.data[this.base].Get("largeop")) {u = v = 0}
}
var min = this.getValues("subscriptshift","superscriptshift"), mu = this.SVGgetMu(svg);
min.subscriptshift = (min.subscriptshift === "" ? 0 : SVG.length2em(min.subscriptshift,mu));
min.superscriptshift = (min.superscriptshift === "" ? 0 : SVG.length2em(min.superscriptshift,mu));
var dx = 0;
if (presub) {dx = presub.w+delta} else if (presup) {dx = presup.w-delta}
svg.Add(base,Math.max(0,dx),0);
if (!sup && !presup) {
v = Math.max(v,SVG.TeX.sub1*scale,min.subscriptshift);
if (sub) {v = Math.max(v,sub.h-(4/5)*x_height)}
if (presub) {v = Math.max(v,presub.h-(4/5)*x_height)}
if (sub) {svg.Add(sub,dx+base.w+s-delta,-v)}
if (presub) {svg.Add(presub,0,-v)}
} else {
if (!sub && !presub) {
var values = this.getValues("displaystyle","texprimestyle");
p = SVG.TeX[(values.displaystyle ? "sup1" : (values.texprimestyle ? "sup3" : "sup2"))];
u = Math.max(u,p*scale,min.superscriptshift);
if (sup) {u = Math.max(u,sup.d+(1/4)*x_height)}
if (presup) {u = Math.max(u,presup.d+(1/4)*x_height)}
if (sup) {svg.Add(sup,dx+base.w+s,u)}
if (presup) {svg.Add(presup,0,u)}
} else {
v = Math.max(v,SVG.TeX.sub2*scale);
var t = SVG.TeX.rule_thickness * scale;
var h = (sub||presub).h, d = (sup||presup).d;
if (presub) {h = Math.max(h,presub.h)}
if (presup) {d = Math.max(d,presup.d)}
if ((u - d) - (h - v) < 3*t) {
v = 3*t - u + d + h; q = (4/5)*x_height - (u - d);
if (q > 0) {u += q; v -= q}
}
u = Math.max(u,min.superscriptshift); v = Math.max(v,min.subscriptshift);
if (sup) {svg.Add(sup,dx+base.w+s,u)}
if (presup) {svg.Add(presup,dx+delta-presup.w,u)}
if (sub) {svg.Add(sub,dx+base.w+s-delta,-v)}
if (presub) {svg.Add(presub,dx-presub.w,-v)}
}
}
svg.Clean();
this.SVGhandleColor(svg);
this.SVGsaveData(svg);
var data = this.SVGdata;
data.dx = dx; data.s = s; data.u = u, data.v = v; data.delta = delta;
return svg;
},
SVGgetScripts: function (s) {
var sup, sub, BOX = [];
var i = 1, m = this.data.length, W = 0;
for (var k = 0; k < 4; k += 2) {
while (i < m && (this.data[i]||{}).type !== "mprescripts") {
var box = [null,null,null,null];
for (var j = k; j < k+2; j++) {
if (this.data[i] && this.data[i].type !== "none" && this.data[i].type !== "mprescripts") {
if (!BOX[j]) {BOX[j] = SVG.BBOX.G()}
box[j] = this.data[i].toSVG();
}
if ((this.data[i]||{}).type !== "mprescripts") i++;
}
var isPre = (k === 2);
if (isPre) W += Math.max((box[k]||{w:0}).w,(box[k+1]||{w:0}).w);
if (box[k]) BOX[k].Add(box[k].With({x:W-(isPre?box[k].w:0)}));
if (box[k+1]) BOX[k+1].Add(box[k+1].With({x:W-(isPre?box[k+1].w:0)}));
sub = BOX[k]||{w:0}; sup = BOX[k+1]||{w:0};
sub.w = sup.w = W = Math.max(sub.w,sup.w);
}
i++; W = 0;
}
for (j = 0; j < 4; j++) {if (BOX[j]) {BOX[j].w += s; BOX[j].Clean()}}
return BOX;
}
});
MathJax.Hub.Startup.signal.Post("SVG mmultiscripts Ready");
MathJax.Ajax.loadComplete(SVG.autoloadDir+"/mmultiscripts.js");
});
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