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91 lines
3.5 KiB
JavaScript
91 lines
3.5 KiB
JavaScript
/*************************************************************
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*
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* MathJax/extensions/TeX/bbox.js
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*
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* This file implements the \bbox macro, which creates an box that
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* can be styled (for background colors, and so on). You can include
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* an optional dimension that tells how much extra padding to include
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* around the bounding box for the mathematics, or a color specification
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* for the background color to use, or both. E.g.,
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*
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* \bbox[2pt]{x+y} % an invisible box around x+y with 2pt of extra space
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* \bbox[green]{x+y} % a green box around x+y
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* \bbox[green,2pt]{x+y} % a green box with 2pt of extra space
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*
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* You can also specify style attributes, for example
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*
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* \bbox[red,border:3px solid blue,5px]{x+y}
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*
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* would give a red background with a 3px solid blue border that has 5px
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* of padding between the border and the mathematics. Note that not all
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* output formats support the style specifications. In particular, the
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* NativeMML output depends on the browser to render the attributes, and
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* not all MathML renderers will honor them (e.g., MathPlayer2 doesn't
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* render border styles).
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*
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* This file will be loaded automatically when \bbox is first used.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2011-2012 Design Science, Inc.
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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.Extension["TeX/bbox"] = {
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version: "2.0"
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};
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MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
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var TEX = MathJax.InputJax.TeX,
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MML = MathJax.ElementJax.mml;
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TEX.Definitions.macros.bbox = "BBox";
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TEX.Parse.Augment({
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BBox: function (name) {
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var bbox = this.GetBrackets(name,""),
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math = this.ParseArg(name);
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var parts = bbox.split(/,/), def, background, style;
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for (var i in parts) {
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var part = parts[i].replace(/^\s+/,'').replace(/\s+$/,'');
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var match = part.match(/^(\.\d+|\d+(\.\d*)?)(pt|em|ex|mu|px|in|cm|mm)$/);
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if (match) {
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var pad = match[1]+match[3];
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if (def) {TEX.Error("Padding specified twice in "+name)}
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def = {height:"+"+pad, depth:"+"+pad, lspace:pad, width:"+"+(2*match[1])+match[3]};
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} else if (part.match(/^([a-z0-9]+|\#[0-9a-f]{6}|\#[0-9a-f]{3})$/i)) {
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if (background) {TEX.Error("Background specified twice in "+name)}
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background = part;
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} else if (part.match(/^[-a-z]+:/i)) {
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if (style) {TEX.Error("Style specified twice in "+name)}
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style = part;
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} else if (part !== "") {
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TEX.Error("'"+part+"' doesn't look like a color, a padding dimension, or a style");
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}
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}
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if (def) {math = MML.mpadded(math).With(def)}
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if (background || style) {
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math = MML.mstyle(math).With({mathbackground:background, style:style});
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}
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this.Push(math);
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}
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});
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MathJax.Hub.Startup.signal.Post("TeX bbox Ready");
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});
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MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/bbox.js");
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