349 lines
9.8 KiB
JavaScript
349 lines
9.8 KiB
JavaScript
|
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
|
||
|
|
/* vim: set ts=2 et sw=2 tw=80: */
|
||
|
|
|
||
|
|
/*************************************************************
|
||
|
|
*
|
||
|
|
* MathJax/extensions/Safe.js
|
||
|
|
*
|
||
|
|
* Implements a "Safe" mode that disables features that could be
|
||
|
|
* misused in a shared environment (such as href's to javascript URL's).
|
||
|
|
* See the CONFIG variable below for configuration options.
|
||
|
|
*
|
||
|
|
* ---------------------------------------------------------------------
|
||
|
|
*
|
||
|
|
* Copyright (c) 2013 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
(function (HUB,AJAX) {
|
||
|
|
var VERSION = "2.3";
|
||
|
|
|
||
|
|
var CONFIG = MathJax.Hub.CombineConfig("Safe",{
|
||
|
|
allow: {
|
||
|
|
//
|
||
|
|
// Values can be "all", "safe", or "none"
|
||
|
|
//
|
||
|
|
URLs: "safe", // safe are in safeProtocols below
|
||
|
|
classes: "safe", // safe start with MJX-
|
||
|
|
cssIDs: "safe", // safe start with MJX-
|
||
|
|
styles: "safe", // safe are in safeStyles below
|
||
|
|
fontsize: "all", // safe are between sizeMin and sizeMax em's
|
||
|
|
require: "safe" // safe are in safeRequire below
|
||
|
|
},
|
||
|
|
sizeMin: .7, // \scriptsize
|
||
|
|
sizeMax: 1.44, // \large
|
||
|
|
safeProtocols: {
|
||
|
|
http: true,
|
||
|
|
https: true,
|
||
|
|
file: true,
|
||
|
|
javascript: false
|
||
|
|
},
|
||
|
|
safeStyles: {
|
||
|
|
color: true,
|
||
|
|
backgroundColor: true,
|
||
|
|
border: true,
|
||
|
|
cursor: true,
|
||
|
|
margin: true,
|
||
|
|
padding: true,
|
||
|
|
textShadow: true,
|
||
|
|
fontFamily: true,
|
||
|
|
fontSize: true,
|
||
|
|
fontStyle: true,
|
||
|
|
fontWeight: true,
|
||
|
|
opacity: true,
|
||
|
|
outline: true
|
||
|
|
},
|
||
|
|
safeRequire: {
|
||
|
|
action: true,
|
||
|
|
amscd: true,
|
||
|
|
amsmath: true,
|
||
|
|
amssymbols: true,
|
||
|
|
autobold: false,
|
||
|
|
"autoload-all": false,
|
||
|
|
bbox: true,
|
||
|
|
begingroup: true,
|
||
|
|
boldsymbol: true,
|
||
|
|
cancel: true,
|
||
|
|
color: true,
|
||
|
|
enclose: true,
|
||
|
|
extpfeil: true,
|
||
|
|
HTML: true,
|
||
|
|
mathchoice: true,
|
||
|
|
mhchem: true,
|
||
|
|
newcommand: true,
|
||
|
|
noErrors: false,
|
||
|
|
noUndefined: false,
|
||
|
|
unicode: true,
|
||
|
|
verb: true
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var ALLOW = CONFIG.allow;
|
||
|
|
if (ALLOW.fontsize !== "all") {CONFIG.safeStyles.fontSize = false}
|
||
|
|
|
||
|
|
var SAFE = MathJax.Extension.Safe = {
|
||
|
|
version: VERSION,
|
||
|
|
config: CONFIG,
|
||
|
|
div1: document.createElement("div"), // for CSS processing
|
||
|
|
div2: document.createElement("div"),
|
||
|
|
|
||
|
|
//
|
||
|
|
// Methods called for MathML attribute processing
|
||
|
|
//
|
||
|
|
filter: {
|
||
|
|
href: "filterURL",
|
||
|
|
src: "filterURL",
|
||
|
|
altimg: "filterURL",
|
||
|
|
"class": "filterClass",
|
||
|
|
style: "filterStyles",
|
||
|
|
id: "filterID",
|
||
|
|
fontsize: "filterFontSize",
|
||
|
|
mathsize: "filterFontSize",
|
||
|
|
scriptminsize: "filterFontSize",
|
||
|
|
scriptsizemultiplier: "filterSizeMultiplier",
|
||
|
|
scriptlevel: "filterScriptLevel"
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter HREF URL's
|
||
|
|
//
|
||
|
|
filterURL: function (url) {
|
||
|
|
var protocol = (url.match(/^\s*([a-z]+):/i)||[null,""])[1].toLowerCase();
|
||
|
|
if (ALLOW.URLs === "none" ||
|
||
|
|
(ALLOW.URLs !== "all" && !CONFIG.safeProtocols[protocol])) {url = null}
|
||
|
|
return url;
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter class names and css ID's
|
||
|
|
//
|
||
|
|
filterClass: function (CLASS) {
|
||
|
|
if (ALLOW.classes === "none" ||
|
||
|
|
(ALLOW.classes !== "all" && !CLASS.match(/^MJX-[-a-zA-Z0-9_.]+$/))) {CLASS = null}
|
||
|
|
return CLASS;
|
||
|
|
},
|
||
|
|
filterID: function (id) {
|
||
|
|
if (ALLOW.cssIDs === "none" ||
|
||
|
|
(ALLOW.cssIDs !== "all" && !id.match(/^MJX-[-a-zA-Z0-9_.]+$/))) {id = null}
|
||
|
|
return id;
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter style strings
|
||
|
|
//
|
||
|
|
filterStyles: function (styles) {
|
||
|
|
if (ALLOW.styles === "all") {return styles}
|
||
|
|
if (ALLOW.styles === "none") {return null}
|
||
|
|
try {
|
||
|
|
//
|
||
|
|
// Set the div1 styles to the given styles, and clear div2
|
||
|
|
//
|
||
|
|
var STYLE1 = this.div1.style, STYLE2 = this.div2.style;
|
||
|
|
STYLE1.cssText = styles; STYLE2.cssText = "";
|
||
|
|
//
|
||
|
|
// Check each allowed style and transfer OK ones to div2
|
||
|
|
//
|
||
|
|
for (var name in CONFIG.safeStyles) {if (CONFIG.safeStyles.hasOwnProperty(name)) {
|
||
|
|
var value = this.filterStyle(name,STYLE1[name]);
|
||
|
|
if (value != null) {STYLE2[name] = value}
|
||
|
|
}}
|
||
|
|
//
|
||
|
|
// Return the div2 style string
|
||
|
|
//
|
||
|
|
styles = STYLE2.cssText;
|
||
|
|
} catch (e) {styles = null}
|
||
|
|
return styles;
|
||
|
|
},
|
||
|
|
//
|
||
|
|
// Filter an individual name:value style pair
|
||
|
|
//
|
||
|
|
filterStyle: function (name,value) {
|
||
|
|
if (typeof value !== "string") {return null}
|
||
|
|
if (value.match(/^\s*expression/)) {return null}
|
||
|
|
if (value.match(/javascript:/)) {return null}
|
||
|
|
return (CONFIG.safeStyles[name] ? value : null);
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter TeX font size values (in em's)
|
||
|
|
//
|
||
|
|
filterSize: function (size) {
|
||
|
|
if (ALLOW.fontsize === "none") {return null}
|
||
|
|
if (ALLOW.fontsize !== "all")
|
||
|
|
{size = Math.min(Math.max(size,CONFIG.sizeMin),CONFIG.sizeMax)}
|
||
|
|
return size;
|
||
|
|
},
|
||
|
|
filterFontSize: function (size) {
|
||
|
|
return (ALLOW.fontsize === "all" ? size: null);
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter scriptsizemultiplier
|
||
|
|
//
|
||
|
|
filterSizeMultiplier: function (size) {
|
||
|
|
if (ALLOW.fontsize === "none") {size = null}
|
||
|
|
else if (ALLOW.fontsize !== "all") {size = Math.min(1,Math.max(.6,size)).toString()}
|
||
|
|
return size;
|
||
|
|
},
|
||
|
|
//
|
||
|
|
// Filter scriptLevel
|
||
|
|
//
|
||
|
|
filterScriptLevel: function (level) {
|
||
|
|
if (ALLOW.fontsize === "none") {level = null}
|
||
|
|
else if (ALLOW.fontsize !== "all") {level = Math.max(0,level).toString()}
|
||
|
|
return level;
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter TeX extension names
|
||
|
|
//
|
||
|
|
filterRequire: function (name) {
|
||
|
|
if (ALLOW.require === "none" ||
|
||
|
|
(ALLOW.require !== "all" && !CONFIG.safeRequire[name.toLowerCase()]))
|
||
|
|
{name = null}
|
||
|
|
return name;
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
HUB.Register.StartupHook("TeX HTML Ready",function () {
|
||
|
|
var TEX = MathJax.InputJax.TeX;
|
||
|
|
|
||
|
|
TEX.Parse.Augment({
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implements \href{url}{math} with URL filter
|
||
|
|
//
|
||
|
|
HREF_attribute: function (name) {
|
||
|
|
var url = SAFE.filterURL(this.GetArgument(name)),
|
||
|
|
arg = this.GetArgumentMML(name);
|
||
|
|
if (url) {arg.With({href:url})}
|
||
|
|
this.Push(arg);
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implements \class{name}{math} with class-name filter
|
||
|
|
//
|
||
|
|
CLASS_attribute: function (name) {
|
||
|
|
var CLASS = SAFE.filterClass(this.GetArgument(name)),
|
||
|
|
arg = this.GetArgumentMML(name);
|
||
|
|
if (CLASS) {
|
||
|
|
if (arg["class"] != null) {CLASS = arg["class"] + " " + CLASS}
|
||
|
|
arg.With({"class":CLASS});
|
||
|
|
}
|
||
|
|
this.Push(arg);
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implements \style{style-string}{math} with style filter
|
||
|
|
//
|
||
|
|
STYLE_attribute: function (name) {
|
||
|
|
var style = SAFE.filterStyles(this.GetArgument(name)),
|
||
|
|
arg = this.GetArgumentMML(name);
|
||
|
|
if (style) {
|
||
|
|
if (arg.style != null) {
|
||
|
|
if (style.charAt(style.length-1) !== ";") {style += ";"}
|
||
|
|
style = arg.style + " " + style;
|
||
|
|
}
|
||
|
|
arg.With({style: style});
|
||
|
|
}
|
||
|
|
this.Push(arg);
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implements \cssId{id}{math} with ID filter
|
||
|
|
//
|
||
|
|
ID_attribute: function (name) {
|
||
|
|
var ID = SAFE.filterID(this.GetArgument(name)),
|
||
|
|
arg = this.GetArgumentMML(name);
|
||
|
|
if (ID) {arg.With({id:ID})}
|
||
|
|
this.Push(arg);
|
||
|
|
}
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
HUB.Register.StartupHook("TeX Jax Ready",function () {
|
||
|
|
var TEX = MathJax.InputJax.TeX,
|
||
|
|
PARSE = TEX.Parse, METHOD = SAFE.filter;
|
||
|
|
|
||
|
|
PARSE.Augment({
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implements \require{name} with filtering
|
||
|
|
//
|
||
|
|
Require: function (name) {
|
||
|
|
var file = this.GetArgument(name).replace(/.*\//,"").replace(/[^a-z0-9_.-]/ig,"");
|
||
|
|
file = SAFE.filterRequire(file);
|
||
|
|
if (file) {this.Extension(null,file)}
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Controls \mmlToken attributes
|
||
|
|
//
|
||
|
|
MmlFilterAttribute: function (name,value) {
|
||
|
|
if (METHOD[name]) {value = SAFE[METHOD[name]](value)}
|
||
|
|
return value;
|
||
|
|
},
|
||
|
|
|
||
|
|
//
|
||
|
|
// Handles font size macros with filtering
|
||
|
|
//
|
||
|
|
SetSize: function (name,size) {
|
||
|
|
size = SAFE.filterSize(size);
|
||
|
|
if (size) {
|
||
|
|
this.stack.env.size = size;
|
||
|
|
this.Push(TEX.Stack.Item.style().With({styles: {mathsize: size+"em"}}));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
HUB.Register.StartupHook("TeX bbox Ready",function () {
|
||
|
|
var TEX = MathJax.InputJax.TeX;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter the styles for \bbox
|
||
|
|
//
|
||
|
|
TEX.Parse.Augment({
|
||
|
|
BBoxStyle: function (styles) {return SAFE.filterStyles(styles)}
|
||
|
|
});
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
HUB.Register.StartupHook("MathML Jax Ready",function () {
|
||
|
|
var PARSE = MathJax.InputJax.MathML.Parse,
|
||
|
|
METHOD = SAFE.filter;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Filter MathML attributes
|
||
|
|
//
|
||
|
|
PARSE.Augment({
|
||
|
|
filterAttribute: function (name,value) {
|
||
|
|
if (METHOD[name]) {value = SAFE[METHOD[name]](value)}
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
// MathML input (href, style, fontsize, class, id)
|
||
|
|
|
||
|
|
HUB.Startup.signal.Post("Safe Extension Ready");
|
||
|
|
AJAX.loadComplete("[MathJax]/extensions/Safe.js");
|
||
|
|
|
||
|
|
})(MathJax.Hub,MathJax.Ajax);
|