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Diffstat (limited to 'js/mathjax/jax/output/CommonHTML/autoload/mmultiscripts.js')
| -rw-r--r-- | js/mathjax/jax/output/CommonHTML/autoload/mmultiscripts.js | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/js/mathjax/jax/output/CommonHTML/autoload/mmultiscripts.js b/js/mathjax/jax/output/CommonHTML/autoload/mmultiscripts.js new file mode 100644 index 0000000..e9cce12 --- /dev/null +++ b/js/mathjax/jax/output/CommonHTML/autoload/mmultiscripts.js @@ -0,0 +1,298 @@ +// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0 +/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */ +/* vim: set ts=2 et sw=2 tw=80: */ + +/************************************************************* + * + * MathJax/jax/output/CommonHTML/autoload/mmultiscripts.js + * + * Implements the CommonHTML output for <mmultiscripts> elements. + * + * --------------------------------------------------------------------- + * + * Copyright (c) 2015-2020 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("CommonHTML Jax Ready",function () { + var VERSION = "2.7.9"; + var MML = MathJax.ElementJax.mml, + CHTML = MathJax.OutputJax.CommonHTML; + + MML.mmultiscripts.Augment({ + toCommonHTML: function (node,options) { + var stretch = (options||{}).stretch; + if (!stretch) { + node = this.CHTMLcreateNode(node); + this.CHTMLhandleStyle(node); + this.CHTMLgetVariant(); + this.CHTMLhandleScale(node); + } + CHTML.BBOX.empty(this.CHTML); + + // + // Get base node + // + var base, bbox; + if (stretch) { + base = CHTML.getNode(node,"mjx-base"); + } else { + this.CHTMLaddChild(node,0,{type:"mjx-base", noBBox:true, forceChild:true}); + base = node.firstChild; + } + bbox = this.CHTMLbboxFor(0); + if (bbox.ic) { + bbox.R -= bbox.ic; // remove IC (added by mo and mi) + if (!stretch) base.style.marginRight = CHTML.Em(-bbox.ic); + delta = 1.3*bbox.ic + .05; // make faked IC be closer to expeted results + } + + // + // Collect scripts into horizontal boxes and add them into the node + // + var BOX = {}, BBOX = {}; + this.CHTMLgetScripts(BOX,BBOX,stretch,node); + var sub = BOX.sub, sup = BOX.sup, presub = BOX.presub, presup = BOX.presup; + var sbox = BBOX.sub, Sbox = BBOX.sup, pbox = BBOX.presub, Pbox = BBOX.presup; + if (!stretch) this.CHTMLaddBoxes(node,base,BOX); + + // + // Get the initial values for the variables + // + var values = this.getValues("scriptlevel","scriptsizemultiplier"); + var sscale = (this.Get("scriptlevel") < 3 ? values.scriptsizemultiplier : 1); + var ex = CHTML.TEX.x_height, s = CHTML.TEX.scriptspace; + var q = CHTML.TEX.sup_drop * sscale, r = CHTML.TEX.sub_drop * sscale; + var u = bbox.h - q, v = bbox.d + r, delta = 0, p; + var bmml = this.data[this.base]; + if (bmml && (bmml.type === "mi" || bmml.type === "mo")) { + if (CHTML.isChar(bmml.data.join("")) && bbox.rscale === 1 && !bbox.sH && + !bmml.Get("largeop")) {u = v = 0} + } + values = this.getValues("displaystyle","subscriptshift","superscriptshift","texprimestyle"); + values.subscriptshift = (values.subscriptshift === "" ? 0 : this.CHTMLlength2em(values.subscriptshift)); + values.superscriptshift = (values.superscriptshift === "" ? 0 : this.CHTMLlength2em(values.superscriptshift)); + + var dx = (presub ? s+pbox.w : presup ? s+Pbox.w-delta : 0); + this.CHTML.combine(bbox,dx,0); var x = this.CHTML.w; + + // + // Place the scripts as needed + // + if (!sup && !presup) { + v = Math.max(v,CHTML.TEX.sub1,values.subscriptshift); + if (sub) v = Math.max(v,sbox.h-(4/5)*ex); + if (presub) v = Math.max(v,pbox.h-(4/5)*ex); + if (sub) this.CHTMLplaceSubOnly(sub,sbox,x,v,s); + if (presub) this.CHTMLplacePresubOnly(presub,pbox,v,s); + } else { + if (!sub && !presub) { + p = CHTML.TEX[(values.displaystyle ? "sup1" : (values.texprimestyle ? "sup3" : "sup2"))]; + u = Math.max(u,p,values.superscriptshift); + if (sup) u = Math.max(u,Sbox.d+(1/4)*ex); + if (presup) u = Math.max(u,Pbox.d+(1/4)*ex); + if (sup) this.CHTMLplaceSupOnly(sup,Sbox,x,delta,u,s); + if (presup) this.CHTMLplacePresupOnly(presup,Pbox,delta,u,s); + } else { + v = Math.max(v,CHTML.TEX.sub2); + var t = CHTML.TEX.rule_thickness; + var h = (sbox||pbox).h, d = (Sbox||Pbox).d; + if (presub) h = Math.max(h,pbox.h); + if (presup) d = Math.max(d,Pbox.d); + if ((u - d) - (h - v) < 3*t) { + v = 3*t - u + d + h; q = (4/5)*ex - (u - d); + if (q > 0) {u += q; v -= q} + } + u = Math.max(u,values.superscriptshift); + v = Math.max(v,values.subscriptshift); + if (sup) { + if (sub) {this.CHTMLplaceSubSup(sub,sbox,sup,Sbox,x,delta,u,v,s)} + else {this.CHTMLplaceSupOnly(sup,Sbox,x,delta,u,s)} + } else if (sub) {this.CHTMLplaceSubOnly(sub,sbox,x,v,s)} + if (presup) { + if (presub) {this.CHTMLplacePresubPresup(presub,pbox,presup,Pbox,delta,u,v,s)} + else {this.CHTMLplacePresupOnly(presup,Pbox,delta,u,s)} + } else if (presub) {this.CHTMLplacePresubOnly(presub,pbox,v,s)} + } + } + this.CHTML.clean(); + this.CHTMLhandleSpace(node); + this.CHTMLhandleBBox(node); + this.CHTMLhandleColor(node); + return node; + }, + // + // Get the subscript, superscript, presubscript, and presuperscript + // boxes, with proper spacing, and computer their bounding boxes. + // + CHTMLgetScripts: function (BOX,BBOX,stretch,node) { + if (stretch) { + BOX.sub = CHTML.getNode(node,"mjx-sub"); + BOX.sup = CHTML.getNode(node,"mjx-sup"); + BOX.presub = CHTML.getNode(node,"mjx-presub"); + BOX.presup = CHTML.getNode(node,"mjx-presup"); + BBOX.sub = this.CHTMLbbox.sub; + BBOX.sup = this.CHTMLbbox.sup; + BBOX.presub = this.CHTMLbbox.presub; + BBOX.presup = this.CHTMLbbox.presup; + return; + } + this.CHTMLbbox = BBOX; // save for when stretched + var state = {i:1, w:0, BOX:BOX, BBOX:BBOX}, m = this.data.length; + var sub = "sub", sup = "sup"; + while (state.i < m) { + if ((this.data[state.i]||{}).type === "mprescripts") { + state.i++; state.w = 0; + sub = "presub"; sup = "presup"; + } else { + var sbox = this.CHTMLaddScript(sub,state,node); + var Sbox = this.CHTMLaddScript(sup,state,node); + var w = Math.max((sbox ? sbox.rscale*sbox.w : 0),(Sbox ? Sbox.rscale*Sbox.w : 0)); + this.CHTMLpadScript(sub,w,sbox,state); + this.CHTMLpadScript(sup,w,Sbox,state); + state.w += w; + } + } + if (BBOX.sub) BBOX.sub.clean(); + if (BBOX.sup) BBOX.sup.clean(); + if (BBOX.presub) BBOX.presub.clean(); + if (BBOX.presup) BBOX.presup.clean(); + }, + // + // Add a script to the proper box, creating the box if needed, + // and padding the box to account for any <none/> elements. + // Return the bounding box for the script for later use. + // + CHTMLaddScript: function (type,state,node) { + var BOX, BBOX, data = this.data[state.i]; + if (data && data.type !== "none" && data.type !== "mprescripts") { + BOX = state.BOX[type]; + if (!BOX) { + // + // Add the box to the node temporarily so that it is in the DOM + // (so that CHTMLnodeElement() can be used in the toCommonHTML() below). + // See issue #1480. + // + BOX = state.BOX[type] = CHTML.addElement(node,"mjx-"+type); + BBOX = state.BBOX[type] = CHTML.BBOX.empty(); + if (state.w) { + BOX.style.paddingLeft = CHTML.Em(state.w); + BBOX.w = BBOX.r = state.w; BBOX.x = state.w; + } + } + data.toCommonHTML(BOX); + BBOX = data.CHTML; + } + if (data && data.type !== "mprescripts") state.i++; + return BBOX; + }, + // + // Add padding to the script box to make match the width of the + // super- or subscript that is above or below it, and adjust the + // bounding box for the script row. If these are pre-scripts, + // right-justify the scripts, otherwise, left-justify them. + // + CHTMLpadScript: function (type,w,bbox,state) { + if (!bbox) bbox = {w:0, fake:1, rscale:1}; + var BBOX = state.BBOX[type], dx = 0, dw = 0; + if (BBOX) { + if (bbox.rscale*bbox.w < w) { + var BOX = state.BOX[type]; dw = w-bbox.rscale*bbox.w; + var space = CHTML.Element("mjx-spacer",{style:{width:CHTML.Em(dw)}}); + if (type.substr(0,3) === "pre" && !bbox.fake) { + BOX.insertBefore(space,BOX.lastChild); + dx = dw; dw = 0; + } else { + BOX.appendChild(space); + } + } + if (bbox.fake) {BBOX.w += dx} else {BBOX.combine(bbox,BBOX.w+dx,0)} + BBOX.w += dw; + } + }, + // + // Add the boxes into the main node, creating stacks when needed + // + CHTMLaddBoxes: function (node,base,BOX) { + var sub = BOX.sub, sup = BOX.sup, presub = BOX.presub, presup = BOX.presup; + if (presub && presup) { + var prestack = CHTML.Element("mjx-prestack"); node.insertBefore(prestack,base); + prestack.appendChild(presup); prestack.appendChild(presub); + } else { + if (presub) node.insertBefore(presub,base); + if (presup) node.insertBefore(presup,base); + } + if (sub && sup) { + var stack = CHTML.addElement(node,"mjx-stack"); + stack.appendChild(sup); stack.appendChild(sub); + } else { + if (sub) node.appendChild(sub); + if (sup) node.appendChild(sup); + } + }, + // + // Handle positioning the various scripts + // + CHTMLplaceSubOnly: function (sub,sbox,x,v,s) { + sub.style.verticalAlign = CHTML.Em(-v); + sub.style.marginRight = CHTML.Em(s); sbox.w += s; + this.CHTML.combine(sbox,x,-v); + }, + CHTMLplaceSupOnly: function (sup,Sbox,x,delta,u,s) { + sup.style.verticalAlign = CHTML.Em(u); + sup.style.paddingLeft = CHTML.Em(delta); + sup.style.paddingRight = CHTML.Em(s); Sbox.w += s; + this.CHTML.combine(Sbox,x+delta,u); + }, + CHTMLplaceSubSup: function (sub,sbox,sup,Sbox,x,delta,u,v,s) { + sub.style.paddingRight = CHTML.Em(s); sbox.w += s; + sup.style.paddingBottom = CHTML.Em(u+v-Sbox.d-sbox.h); + sup.style.paddingLeft = CHTML.Em(delta+(Sbox.x||0)); + sup.style.paddingRight = CHTML.Em(s); Sbox.w += s; + sup.parentNode.style.verticalAlign = CHTML.Em(-v); + this.CHTML.combine(sbox,x,-v); + this.CHTML.combine(Sbox,x+delta,u); + }, + CHTMLplacePresubOnly: function (presub,pbox,v,s) { + presub.style.verticalAlign = CHTML.Em(-v); + presub.style.marginLeft = CHTML.Em(s); + this.CHTML.combine(pbox,s,-v); + }, + CHTMLplacePresupOnly: function (presup,Pbox,delta,u,s) { + presup.style.verticalAlign = CHTML.Em(u); + presup.style.paddingLeft = CHTML.Em(s); + presup.style.paddingRight = CHTML.Em(-delta); + this.CHTML.combine(Pbox,s,u); + }, + CHTMLplacePresubPresup: function (presub,pbox,presup,Pbox,delta,u,v,s) { + presub.style.paddingLeft = CHTML.Em(s); + presup.style.paddingBottom = CHTML.Em(u+v-Pbox.d-pbox.h); + presup.style.paddingLeft = CHTML.Em(delta+s+(Pbox.x||0)); + presup.style.paddingRight = CHTML.Em(-delta); + presup.parentNode.style.verticalAlign = CHTML.Em(-v); + this.CHTML.combine(pbox,s,-v); + this.CHTML.combine(Pbox,s+delta,u); + }, + // + // Handle stretchy bases + // + CHTMLstretchH: MML.mbase.CHTMLstretchH, + CHTMLstretchV: MML.mbase.CHTMLstretchV + }); + + MathJax.Hub.Startup.signal.Post("CommonHTML mmultiscripts Ready"); + MathJax.Ajax.loadComplete(CHTML.autoloadDir+"/mmultiscripts.js"); +}); + +// @license-end |