160 lines
6.8 KiB
JavaScript
160 lines
6.8 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/HTML-CSS/autoload/mmultiscripts.js
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*
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* Implements the HTML-CSS output for <mmultiscripts> elements.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2010-2013 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("HTML-CSS Jax Ready",function () {
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var VERSION = "2.3";
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var MML = MathJax.ElementJax.mml,
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HTMLCSS = MathJax.OutputJax["HTML-CSS"];
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MML.mmultiscripts.Augment({
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toHTML: function (span,HW,D) {
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span = this.HTMLcreateSpan(span); var scale = this.HTMLgetScale();
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var stack = HTMLCSS.createStack(span), values;
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var base = HTMLCSS.createBox(stack);
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if (this.data[this.base]) {
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var child = this.data[this.base].toHTML(base);
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if (D != null) {this.data[this.base].HTMLstretchV(base,HW,D)}
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else if (HW != null) {this.data[this.base].HTMLstretchH(base,HW)}
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HTMLCSS.Measured(child,base);
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} else {base.bbox = this.HTMLzeroBBox()}
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var x_height = HTMLCSS.TeX.x_height * scale,
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s = HTMLCSS.TeX.scriptspace * scale * .75; // FIXME: .75 can be removed when IC is right?
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var BOX = this.HTMLgetScripts(stack,s);
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var sub = BOX[0], sup = BOX[1], presub = BOX[2], presup = BOX[3];
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// <mmultiscripts> children other than the base can be <none/>,
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// <mprescripts/>, <mrow></mrow> etc so try to get HTMLgetScale from the
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// first element with a spanID. See issue 362.
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var sscale = this.HTMLgetScale();
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for (var i = 1; i < this.data.length; i++) {
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if (this.data[i] && this.data[i].spanID) {
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sscale = this.data[i].HTMLgetScale();
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break;
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}
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}
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var q = HTMLCSS.TeX.sup_drop * sscale, r = HTMLCSS.TeX.sub_drop * sscale;
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var u = base.bbox.h - q, v = base.bbox.d + r, delta = 0, p;
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if (base.bbox.ic) {delta = base.bbox.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.bbox.scale === 1 &&
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!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.HTMLgetMu(span);
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min.subscriptshift = (min.subscriptshift === "" ? 0 : HTMLCSS.length2em(min.subscriptshift,mu));
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min.superscriptshift = (min.superscriptshift === "" ? 0 : HTMLCSS.length2em(min.superscriptshift,mu));
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var dx = 0;
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if (presub) {dx = presub.bbox.w+delta} else if (presup) {dx = presup.bbox.w-delta}
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if (dx < 0) {dx = 0};
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HTMLCSS.placeBox(base,dx,0);
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if (!sup && !presup) {
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v = Math.max(v,HTMLCSS.TeX.sub1*scale,min.subscriptshift);
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if (sub) {v = Math.max(v,sub.bbox.h-(4/5)*x_height)}
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if (presub) {v = Math.max(v,presub.bbox.h-(4/5)*x_height)}
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if (sub) {HTMLCSS.placeBox(sub,dx+base.bbox.w+s-delta,-v)}
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if (presub) {HTMLCSS.placeBox(presub,0,-v)}
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} else {
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if (!sub && !presub) {
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values = this.getValues("displaystyle","texprimestyle");
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p = HTMLCSS.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.bbox.d+(1/4)*x_height)}
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if (presup) {u = Math.max(u,presup.bbox.d+(1/4)*x_height)}
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if (sup) {HTMLCSS.placeBox(sup,dx+base.bbox.w+s,u)}
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if (presup) {HTMLCSS.placeBox(presup,0,u)}
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} else {
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v = Math.max(v,HTMLCSS.TeX.sub2*scale);
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var t = HTMLCSS.TeX.rule_thickness * scale;
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var h = (sub||presub).bbox.h, d = (sup||presup).bbox.d;
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if (presub) {h = Math.max(h,presub.bbox.h)}
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if (presup) {d = Math.max(d,presup.bbox.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) {HTMLCSS.placeBox(sup,dx+base.bbox.w+s,u)}
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if (presup) {HTMLCSS.placeBox(presup,dx+delta-presup.bbox.w,u)}
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if (sub) {HTMLCSS.placeBox(sub,dx+base.bbox.w+s-delta,-v)}
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if (presub) {HTMLCSS.placeBox(presub,dx-presub.bbox.w,-v)}
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}
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}
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this.HTMLhandleSpace(span);
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this.HTMLhandleColor(span);
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return span;
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},
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HTMLgetScripts: function (stack,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]) {
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BOX[j] = HTMLCSS.createBox(stack); BOX[j].bbox = this.HTMLemptyBBox({});
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if (W) {HTMLCSS.createBlank(BOX[j],W); BOX[j].bbox.w = BOX[j].bbox.rw = W}
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}
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this.data[i].toHTML(BOX[j]); this.HTMLcombineBBoxes(this.data[i],BOX[j].bbox);
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}
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i++;
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}
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sub = BOX[k]; sup = BOX[k+1];
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if (sub && sup) {
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if (sub.bbox.w < sup.bbox.w) {
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HTMLCSS.createBlank(sub,sup.bbox.w-sub.bbox.w);
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sub.bbox.w = sup.bbox.w; sub.bbox.rw = Math.max(sub.bbox.w,sub.bbox.rw);
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} else if (sub.bbox.w > sup.bbox.w) {
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HTMLCSS.createBlank(sup,sub.bbox.w-sup.bbox.w);
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sup.bbox.w = sub.bbox.w; sup.bbox.rw = Math.max(sup.bbox.w,sup.bbox.rw);
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}
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}
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if (sub) {W = sub.bbox.w} else if (sup) {W = sup.bbox.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++) {
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if (BOX[j]) {
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BOX[j].bbox.w += s;
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BOX[j].bbox.rw = Math.max(BOX[j].bbox.w,BOX[j].bbox.rw);
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this.HTMLcleanBBox(BOX[j].bbox);
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}
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}
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return BOX;
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},
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HTMLstretchH: MML.mbase.HTMLstretchH,
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HTMLstretchV: MML.mbase.HTMLstretchV
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});
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MathJax.Hub.Startup.signal.Post("HTML-CSS mmultiscripts Ready");
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MathJax.Ajax.loadComplete(HTMLCSS.autoloadDir+"/mmultiscripts.js");
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});
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