/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */ /* vim: set ts=2 et sw=2 tw=80: */ /************************************************************* * * MathJax/extensions/FontWarnings.js * * Implements a font warning message window that appears when * the image fonts, no fonts, or web fonts are used, informing * the user where to download the fonts, or to update to a more * modern browser. The window will fade out automatically after * a time, and the user can dismiss it by a close box. * * To include font warning messages, add "FontWarnings.js" to the * extensions array in your MathJax configuration. * * You can customize the warning messages in a number of ways. Use the * FontWarnings section of the configuration to specify any of the items * shown in the CONFIG variable below. These include * * messageStyle the style to apply to the warning box that is * displayed when MathJax uses one of its fallback * methods. * * removeAfter the amount of time to show the warning message (in ms) * fadeoutTime how long the message should take to fade out * fadeoutSteps how many separate steps to use during the fade out * (set to 0 to use no fadeout and simply remove the window) * * Messages stores the descriptions of the messages to use for the * various warnings (webFonts, imageFonts, and noFonts). * These are arrays of strings to be inserted into the window, * or identifiers within brackets, which refer to the HTML * snippets in the HTML section described below. To disable a * specific message, set its value to null (see example below). * * HTML stores snippets of HTML descriptions for various * common parts of the error messages. These include * the closeBox, the message about web fonts being available * in modern browser, and messages about downloadable fonts. * The STIX and TeX font messages are used when only one * of these is in the availableFonts list. The data for these * are arrays of either strings to include or a description of * an HTML item enclosed in square brackets. That description * has (up to) three parts: the name of the tag to be included, * a list (enclosed in braces) of attributes and their values * to be set on the tag (optional), and an array of the contents * of the tag (optional). See the definitions below for examples. * * For example, * * MathJax.Hub.Config({ * ... * extensions: ["FontWarnings.js"], * FontWarnings: { * removeAfter: 20*1000, // 20 seconds * messageStyle: { * border: "2px solid black", * padding: "2em" * }, * Message: { * webFont: null // no webfont messages (only image and no fonts) * } * } * }); * * would extend the time the message is displayed from 12 seconds to 20, * and changes the border to a solid black one, with 2em of padding * rather than the default of 1em. * * --------------------------------------------------------------------- * * Copyright (c) 2010-2018 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,HTML) { var VERSION = "2.7.5"; var STIXURL = "http://www.stixfonts.org/"; var MATHJAXURL = "https://github.com/mathjax/MathJax/tree/master/fonts/HTML-CSS/TeX/otf"; var CONFIG = HUB.CombineConfig("FontWarnings",{ // // The CSS for the message window // messageStyle: { position:"fixed", bottom:"4em", left:"3em", width:"40em", border: "3px solid #880000", "background-color": "#E0E0E0", color: "black", padding: "1em", "font-size":"small", "white-space":"normal", "border-radius": ".75em", // Opera 10.5 and IE9 "-webkit-border-radius": ".75em", // Safari and Chrome "-moz-border-radius": ".75em", // Firefox "-khtml-border-radius": ".75em", // Konqueror "box-shadow": "4px 4px 10px #AAAAAA", // Opera 10.5 and IE9 "-webkit-box-shadow": "4px 4px 10px #AAAAAA", // Safari 3 and Chrome "-moz-box-shadow": "4px 4px 10px #AAAAAA", // Forefox 3.5 "-khtml-box-shadow": "4px 4px 10px #AAAAAA", // Konqueror filter: "progid:DXImageTransform.Microsoft.dropshadow(OffX=3, OffY=3, Color='gray', Positive='true')" // IE }, // // The messages for the various situations // Message: { webFont: [ ["closeBox"], ["webFont", "MathJax is using web-based fonts to display the mathematics "+ "on this page. These take time to download, so the page would "+ "render faster if you installed math fonts directly in your "+ "system's font folder."], ["fonts"] ], imageFonts: [ ["closeBox"], ["imageFonts", "MathJax is using its image fonts rather than local or web-based fonts. "+ "This will render slower than usual, and the mathematics may not print "+ "at the full resolution of your printer."], ["fonts"], ["webFonts"] ], noFonts: [ ["closeBox"], ["noFonts", "MathJax is unable to locate a font to use to display "+ "its mathematics, and image fonts are not available, so it "+ "is falling back on generic unicode characters in hopes that "+ "your browser will be able to display them. Some characters "+ "may not show up properly, or possibly not at all."], ["fonts"], ["webFonts"] ] }, // // HTML objects that can be referred to in the message definitions // HTML: { // // The definition of the close box // closeBox: [[ "div",{ style: { position:"absolute", overflow:"hidden", top:".1em", right:".1em", border: "1px outset", width:"1em", height:"1em", "text-align": "center", cursor: "pointer", "background-color": "#EEEEEE", color:"#606060", "border-radius": ".5em", // Opera 10.5 "-webkit-border-radius": ".5em", // Safari and Chrome "-moz-border-radius": ".5em", // Firefox "-khtml-border-radius": ".5em" // Konqueror }, onclick: function () { if (DATA.div && DATA.fade === 0) {if (DATA.timer) {clearTimeout(DATA.timer)}; DATA.div.style.display = "none"} } }, [["span",{style:{position:"relative", bottom:".2em"}},["x"]]] ]], webFonts: [ ["p"], ["webFonts", "Most modern browsers allow for fonts to be downloaded over the web. "+ "Updating to a more recent version of your browser (or changing "+ "browsers) could improve the quality of the mathematics on this page." ] ], fonts: [ ["p"], ["fonts", "MathJax can use either the [STIX fonts](%1) or the [MathJax TeX fonts](%2). " + "Download and install one of those fonts to improve your MathJax experience.", STIXURL,MATHJAXURL ] ], STIXfonts: [ ["p"], ["STIXPage", "This page is designed to use the [STIX fonts](%1). " + "Download and install those fonts to improve your MathJax experience.", STIXURL ] ], TeXfonts: [ ["p"], ["TeXPage", "This page is designed to use the [MathJax TeX fonts](%1). " + "Download and install those fonts to improve your MathJax experience.", MATHJAXURL ] ] }, removeAfter: 12*1000, // time to show message (in ms) fadeoutSteps: 10, // fade-out steps fadeoutTime: 1.5*1000 // fadeout over this amount of time (in ms) }); if (MathJax.Hub.Browser.isIE9 && document.documentMode >= 9) {delete CONFIG.messageStyle.filter} // // Data for the window // var DATA = { div: null, // the message window, when displayed fade: 0 // number of fade-out steps so far }; // // Create the message window and start the fade-out timer // var CREATEMESSAGE = function (data) { if (DATA.div) return; var HTMLCSS = MathJax.OutputJax["HTML-CSS"], frame = document.body; if (HUB.Browser.isMSIE) { if (CONFIG.messageStyle.position === "fixed") { MathJax.Message.Init(); // make sure MathJax_MSIE_frame exists frame = document.getElementById("MathJax_MSIE_Frame") || frame; if (frame !== document.body) {CONFIG.messageStyle.position = "absolute"} } } else {delete CONFIG.messageStyle.filter} CONFIG.messageStyle.maxWidth = (document.body.clientWidth-75) + "px"; var i = 0; while (i < data.length) { if (MathJax.Object.isArray(data[i])) { if (data[i].length === 1 && CONFIG.HTML[data[i][0]]) { data.splice.apply(data,[i,1].concat(CONFIG.HTML[data[i][0]])); } else if (typeof data[i][1] === "string") { var message = MathJax.Localization.lookupPhrase(["FontWarnings",data[i][0]],data[i][1]); message = MathJax.Localization.processMarkdown(message,data[i].slice(2),"FontWarnings"); data.splice.apply(data,[i,1].concat(message)); i += message.length; } else {i++} } else {i++} } DATA.div = HTMLCSS.addElement(frame,"div", {id:"MathJax_FontWarning",style:CONFIG.messageStyle},data); MathJax.Localization.setCSS(DATA.div); if (CONFIG.removeAfter) { HUB.Register.StartupHook("End",function () {DATA.timer = setTimeout(FADEOUT,CONFIG.removeAfter)}); } HTML.Cookie.Set("fontWarn",{warned:true}); }; // // Set the opacity based on the number of steps taken so far // and remove the window when it gets to 0 // var FADEOUT = function () { DATA.fade++; if (DATA.timer) {delete DATA.timer} if (DATA.fade < CONFIG.fadeoutSteps) { var opacity = 1 - DATA.fade/CONFIG.fadeoutSteps; DATA.div.style.opacity = opacity; DATA.div.style.filter = "alpha(opacity="+Math.floor(100*opacity)+")"; setTimeout(FADEOUT,CONFIG.fadeoutTime/CONFIG.fadeoutSteps); } else { DATA.div.style.display = "none"; } }; // // Check that we haven't already issued a warning // if (!HTML.Cookie.Get("fontWarn").warned) { // // Hook into the Startup signal and look for font warning messages. // When one comes, issue the correct message. // HUB.Startup.signal.Interest(function (message) { if (message.match(/HTML-CSS Jax - /) && !DATA.div) { var HTMLCSS = MathJax.OutputJax["HTML-CSS"], FONTS = HTMLCSS.config.availableFonts, MSG; var localFonts = (FONTS && FONTS.length); if (!localFonts) {CONFIG.HTML.fonts = [""]} else if (FONTS.length === 1) {CONFIG.HTML.fonts = CONFIG.HTML[FONTS[0]+"fonts"]} if (HTMLCSS.allowWebFonts) {CONFIG.HTML.webfonts = [""]} if (message.match(/- Web-Font/)) {if (localFonts) {MSG = "webFont"}} else if (message.match(/- using image fonts/)) {MSG = "imageFonts"} else if (message.match(/- no valid font/)) {MSG = "noFonts"} if (MSG && CONFIG.Message[MSG]) {MathJax.Localization.loadDomain("FontWarnings",[CREATEMESSAGE,CONFIG.Message[MSG]])} } }); } })(MathJax.Hub,MathJax.HTML); MathJax.Ajax.loadComplete("[MathJax]/extensions/FontWarnings.js");