125 lines
5.0 KiB
JavaScript
125 lines
5.0 KiB
JavaScript
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/*************************************************************
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*
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* MathJax/jax/output/SVG/autoload/mmultiscripts.js
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*
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* Implements the SVG output for <mmultiscripts> elements.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2011-2013 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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MathJax.Hub.Register.StartupHook("SVG Jax Ready",function () {
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var VERSION = "2.3";
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var MML = MathJax.ElementJax.mml,
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SVG = MathJax.OutputJax.SVG;
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MML.mmultiscripts.Augment({
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toSVG: function (HW,D) {
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this.SVGgetStyles();
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var svg = this.SVG(); this.SVGhandleSpace(svg);
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var scale = this.SVGgetScale();
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var base = (this.data[this.base] ? this.SVGdataStretched(this.base,HW,D) : SVG.BBOX.G().Clean());
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var x_height = SVG.TeX.x_height * scale,
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s = SVG.TeX.scriptspace * scale * .75; // FIXME: .75 can be removed when IC is right?
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var BOX = this.SVGgetScripts(s);
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var sub = BOX[0], sup = BOX[1], presub = BOX[2], presup = BOX[3];
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var sscale = (this.data[1]||this).SVGgetScale();
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var q = SVG.TeX.sup_drop * sscale, r = SVG.TeX.sub_drop * sscale;
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var u = base.h - q, v = base.d + r, delta = 0, p;
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if (base.ic) {delta = base.ic}
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if (this.data[this.base] &&
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(this.data[this.base].type === "mi" || this.data[this.base].type === "mo")) {
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if (this.data[this.base].data.join("").length === 1 && base.scale === 1 &&
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!base.stretched && !this.data[this.base].Get("largeop")) {u = v = 0}
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}
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var min = this.getValues("subscriptshift","superscriptshift"), mu = this.SVGgetMu(svg);
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min.subscriptshift = (min.subscriptshift === "" ? 0 : SVG.length2em(min.subscriptshift,mu));
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min.superscriptshift = (min.superscriptshift === "" ? 0 : SVG.length2em(min.superscriptshift,mu));
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var dx = 0;
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if (presub) {dx = presub.w+delta} else if (presup) {dx = presup.w-delta}
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svg.Add(base,Math.max(0,dx),0);
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if (!sup && !presup) {
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v = Math.max(v,SVG.TeX.sub1*scale,min.subscriptshift);
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if (sub) {v = Math.max(v,sub.h-(4/5)*x_height)}
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if (presub) {v = Math.max(v,presub.h-(4/5)*x_height)}
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if (sub) {svg.Add(sub,dx+base.w+s-delta,-v)}
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if (presub) {svg.Add(presub,0,-v)}
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} else {
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if (!sub && !presub) {
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var values = this.getValues("displaystyle","texprimestyle");
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p = SVG.TeX[(values.displaystyle ? "sup1" : (values.texprimestyle ? "sup3" : "sup2"))];
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u = Math.max(u,p*scale,min.superscriptshift);
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if (sup) {u = Math.max(u,sup.d+(1/4)*x_height)}
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if (presup) {u = Math.max(u,presup.d+(1/4)*x_height)}
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if (sup) {svg.Add(sup,dx+base.w+s,u)}
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if (presup) {svg.Add(presup,0,u)}
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} else {
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v = Math.max(v,SVG.TeX.sub2*scale);
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var t = SVG.TeX.rule_thickness * scale;
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var h = (sub||presub).h, d = (sup||presup).d;
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if (presub) {h = Math.max(h,presub.h)}
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if (presup) {d = Math.max(d,presup.d)}
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if ((u - d) - (h - v) < 3*t) {
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v = 3*t - u + d + h; q = (4/5)*x_height - (u - d);
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if (q > 0) {u += q; v -= q}
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}
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u = Math.max(u,min.superscriptshift); v = Math.max(v,min.subscriptshift);
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if (sup) {svg.Add(sup,dx+base.w+s,u)}
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if (presup) {svg.Add(presup,dx+delta-presup.w,u)}
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if (sub) {svg.Add(sub,dx+base.w+s-delta,-v)}
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if (presub) {svg.Add(presub,dx-presub.w,-v)}
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}
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}
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svg.Clean();
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this.SVGhandleColor(svg);
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this.SVGsaveData(svg);
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return svg;
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},
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SVGgetScripts: function (s) {
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var sup, sub, BOX = [];
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var i = 1, m = this.data.length, W = 0;
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for (var k = 0; k < 4; k += 2) {
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while (i < m && this.data[i].type !== "mprescripts") {
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for (var j = k; j < k+2; j++) {
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if (this.data[i] && this.data[i].type !== "none") {
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if (!BOX[j]) {BOX[j] = SVG.BBOX.G()}
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BOX[j].Add(this.data[i].toSVG().With({x:W}));
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}
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i++;
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}
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sub = BOX[k]||{w:0}; sup = BOX[k+1]||{w:0};
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sub.w = sup.w = W = Math.max(sub.w,sup.w);
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}
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i++; W = 0;
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}
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for (j = 0; j < 4; j++) {if (BOX[j]) {BOX[j].w += s; BOX[j].Clean()}}
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return BOX;
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}
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});
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MathJax.Hub.Startup.signal.Post("SVG mmultiscripts Ready");
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MathJax.Ajax.loadComplete(SVG.autoloadDir+"/mmultiscripts.js");
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});
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