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225 lines
7.1 KiB
225 lines
7.1 KiB
5 years ago
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/* -*- 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/extensions/mml-preview.js
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*
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* Implements a fast preview using the NativeMML output jax
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* and then a slower update using whatever output jax the user
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* has selected. The MathML is styled for those browsers that
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* don't support MathML natively.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2014-2018 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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(function (HUB,HTML) {
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var MMLpreview = MathJax.Extension["mml-preview"] = {
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version: "2.7.5",
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//
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// Configuration for the chunking of the main output
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// after the previews have been created
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//
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config: HUB.CombineConfig("mml-preview",{
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EqnChunk: 5, EqnChunkFactor: 1, EqnChunkDelay: 15000
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}),
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//
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// Styles used for browsers that don't have native MathML support
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//
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styles: {
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"math": {
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"font-family": "Times, 'Times New Roman', serif",
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"display": "inline",
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"text-indent": "0",
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"white-space": "nowrap"
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},
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"math[display='block']": {
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"display": "block",
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"text-indent": "0",
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"text-align": "center",
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"margin": "1em 0"
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},
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// "math *[mathbackground]": {
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// "display": "inline-block!important",
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// "background-color": "attr(mathbackground)"
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// },
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// "math *[mathcolor]": {
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// "color": "attr(mathcolor)"
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// },
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"mi": {"font-style": "italic"},
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"mo": {"margin": "0 .15em"},
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"mphantom": {"visibility": "hidden", "display":"inline-block"},
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// "mspace": {
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// "display": "inline-block!important",
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// "width": "attr(width)",
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// "height": "attr(height)"
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// },
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"mfrac": {
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"display": "inline-table!important",
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"vertical-align": "middle",
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"border-collapse": "collapse",
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"margin": "0 .125em"
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},
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"mfrac > *": {
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"display": "table-row!important"
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},
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"mfrac:not([linethickness='0']) > *:first-child": {
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"border-bottom": "thin solid"
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},
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"msqrt, mroot": {
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"display":"-webkit-inline-flex!important",
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"display ":"inline-flex!important",
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"margin-left": ".6em",
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"vertical-align": "middle",
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"border-top": "solid thin",
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"margin-top": "1px"
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},
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"msqrt:before, mroot:before": {
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"margin-left": "-.6em",
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"content": '"\u221A"'
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},
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"mroot > *:nth-child(2)": {
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"margin-top": "-.5em",
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"margin-right": ".25em",
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"margin-left": "-.75em",
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"font-size": "80%", "line-height": 1,
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"-webkit-order": -1, "order": -1
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},
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"msubsup > *:nth-child(2), msub > *:nth-child(2)": {
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"font-size": "80%", "line-height": 1,
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"vertical-align": "sub"
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},
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"msubsup > *:nth-child(3), msup > *:nth-child(2)": {
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"font-size": "80%", "line-height": 1,
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"vertical-align": "super"
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},
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"munderover, munder, mover": {
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"display":"-webkit-inline-flex!important",
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"-webkit-flex-direction": "column",
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"display ":"inline-flex!important",
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"flex-direction": "column"
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},
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"munderover > *:nth-child(2), munder > *:nth-child(2)": {
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"font-size": "80%", "line-height": 1
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},
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"munderover > *:nth-child(3), mover > *:nth-child(2)": {
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"-webkit-order": -1, "order": -1,
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"font-size": "80%", "line-height": 1
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},
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"mover": {"vertical-align": "text-bottom"},
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"munder": {"vertical-align": "text-top"},
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"munderover": {"vertical-align": "middle"},
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"mtable": {
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"display": "inline-table!important",
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"vertical-align": "middle",
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"border-collapse": "collapse"
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},
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"mtr, mlabeledtr": {
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"display": "table-row!important"
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},
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"mtd": {
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"display": "table-cell!important",
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"padding-left": "1em",
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"padding-top": ".5em"
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},
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"mtr > *:first-child": {"padding-left": 0},
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"mtable > mtr:first-child > *": {"padding-top": 0},
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"mlabeledtr > *:first-child": {"display":"none"},
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"semantics > *": {"display":"none!important"},
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"semantics > *:first-child": {"display":"inline"}
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},
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//
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// Ajust the chunking of the output jax
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//
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Config: function () {
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HUB.Config({
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"HTML-CSS": this.config,
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"SVG": this.config
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});
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},
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//
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// Insert a preview span, if there isn't one already,
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// and call the NativeMML output jax to create the preview
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//
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Preview: function (data) {
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var preview = data.script.previousSibling;
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if (!preview || preview.className !== HUB.config.preRemoveClass) {
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preview = HTML.Element("span",{className:HUB.config.preRemoveClass});
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data.script.parentNode.insertBefore(preview,data.script);
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}
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preview.innerHTML = "";
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try {data.math.root.toNativeMML(preview)} catch (e) {}
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return data;
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},
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//
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// Hook into the inut jax postFilter to create the previews as
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// the input jax are processed.
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//
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Register: function (name) {
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HUB.Register.StartupHook(name+" Jax Require",function () {
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var jax = MathJax.InputJax[name];
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var delay = HUB.config.delayJaxRegistration;
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HUB.config.delayJaxRegistration = true;
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HUB.Register.StartupHook(name+" Jax Ready",function () {HUB.config.delayJaxRegistration = delay});
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jax.require.push(
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"[MathJax]/jax/output/NativeMML/config.js",
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"[MathJax]/jax/output/NativeMML/jax.js"
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);
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jax.postfilterHooks.Add(["Preview",MathJax.Extension["mml-preview"]]);
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});
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}
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}
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//
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// Hook into each input jax
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//
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MMLpreview.Register("TeX");
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MMLpreview.Register("MathML");
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MMLpreview.Register("AsciiMath");
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HUB.Register.StartupHook("End Config",["Config",MMLpreview]);
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HUB.Register.StartupHook("onLoad",function () {
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var test = HTML.addElement(document.body,"div",{
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style: {
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visibility:"hidden", position:"absolute", left:0, top:0,
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height:"auto", width:"auto", "font-family":"serif", "line-height":"normal",
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display:"block!important"
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}
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});
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test.innerHTML = "<math><mfrac><mi>xx</mi><mi>yy</mi></mfrac></math>";
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if (test.offsetHeight < test.offsetWidth) {MathJax.Ajax.Styles(MMLpreview.styles)}
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});
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})(MathJax.Hub,MathJax.HTML);
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MathJax.Ajax.loadComplete("[MathJax]/extensions/mml-preview.js");
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