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/*************************************************************
*
* MathJax/jax/output/HTML-CSS/jax.js
*
* Implements the HTML-CSS OutputJax that displays mathematics
* using HTML and CSS to position the characters from math fonts
* in their proper locations.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2009-2010 Design Science, Inc.
*
* 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 (MML,AJAX,HTMLCSS) {
var FONTTEST = MathJax.Object.Subclass({
FontInfo: {
STIX: {family: "STIXSizeOneSym", testString: "() {} []"},
TeX: {family: "MathJax_Size1", testString: "() {} []"}
},
comparisonFont: ["sans-serif","monospace","script","Times","Courier","Arial","Helvetica"],
testSize: ["40px","50px","60px","30px","20px"],
Init: function () {
var div = this.div = document.body.appendChild(document.createElement("div"));
div.style.position = "absolute"; div.style.visibility = "hidden";
div.style.top = div.style.left = 0;
div.style.fontWeight = "normal";
div.style.fontStyle = "normal";
div.style.fontSize = this.testSize[0];
this.text = this.div.appendChild(document.createTextNode(""));
},
findFont: function (fonts,pref) {
if (pref && this.testCollection(pref)) {return pref}
for (var i = 0, m = fonts.length; i < m; i++) {
if (fonts[i] === pref) continue;
if (this.testCollection(fonts[i])) {return fonts[i]}
}
return null;
},
testCollection: function (name) {return this.testFont(this.FontInfo[name])},
testFont: function (font) {
if (font.isWebFont && HTMLCSS.FontFaceBug) {
this.div.style.fontWeight = this.div.style.fontStyle = "normal";
} else {
this.div.style.fontWeight = (font.weight||"normal");
this.div.style.fontStyle = (font.style||"normal");
}
var W = this.getComparisonWidths(font.testString);
if (W) {
this.div.style.fontFamily = "'"+font.family+"',"+this.comparisonFont[0];
if (this.div.offsetWidth == W[0]) {
this.div.style.fontFamily = "'"+font.family+"',"+this.comparisonFont[W[2]];
if (this.div.offsetWidth == W[1]) {return false}
}
if (this.div.offsetWidth != W[3]) {
if (!HTMLCSS.FONTDATA || !HTMLCSS.FONTDATA.hasStyleChar) {return true}
for (var i = 0, m = this.testSize.length; i < m; i++)
{if (this.testStyleChar(font,this.testSize[i])) {return true}}
}
}
return false;
},
styleChar: String.fromCharCode(0xEFFD), // width encodes style
versionChar: String.fromCharCode(0xEFFE), // width encodes version
compChar: String.fromCharCode(0xEFFF), // "standard" width to compare to
testStyleChar: function (font,size) {
var n = 3 + (font.weight ? 2 : 0) + (font.style ? 4 : 0);
var extra = "", dw = 0;
var SIZE = this.div.style.fontSize; this.div.style.fontSize = size;
if (HTMLCSS.msieItalicWidthBug && font.style === "italic") {
this.text.nodeValue = extra = this.compChar;
dw = this.div.offsetWidth;
}
if (HTMLCSS.safariTextNodeBug) {this.div.innerHTML = this.compChar+extra}
else {this.text.nodeValue = this.compChar+extra}
var W = this.div.offsetWidth-dw;
if (HTMLCSS.safariTextNodeBug) {this.div.innerHTML = this.styleChar+extra}
else {this.text.nodeValue = this.styleChar+extra}
var N = Math.floor((this.div.offsetWidth-dw)/W+.5);
if (N === n) {
if (HTMLCSS.safariTextNodeBug) {this.div.innerHTML = this.versionChar+extra}
else {this.text.nodeValue = this.versionChar+extra}
font.version = Math.floor((this.div.offsetWidth-dw)/W+1.5)/2;
}
this.div.style.fontSize = SIZE;
return (N === n);
},
getComparisonWidths: function (string) {
if (HTMLCSS.FONTDATA && HTMLCSS.FONTDATA.hasStyleChar)
{string += this.styleChar + " " + this.compChar}
if (HTMLCSS.safariTextNodeBug) {this.div.innerHTML = string}
else {this.text.nodeValue = string}
this.div.style.fontFamily = this.comparisonFont[0];
var W = this.div.offsetWidth, sW = -1;
if (HTMLCSS.safariWebFontSerif) {
this.div.style.fontFamily = HTMLCSS.safariWebFontSerif[0];
sW = this.div.offsetWidth;
}
for (var i = 1, m = this.comparisonFont.length; i < m; i++) {
this.div.style.fontFamily = this.comparisonFont[i];
if (this.div.offsetWidth != W) {return [W,this.div.offsetWidth,i,sW]}
}
return null;
},
loadWebFont: function (font) {
var n = MathJax.Message.File("Web-Font "+HTMLCSS.fontInUse+"/"+font.directory);
var callback = MathJax.CallBack(["loadComplete",this,font,n]);
AJAX.timer.start(AJAX,[this.checkWebFont,font,callback],1);
return callback;
},
loadComplete: function (font,n) {
MathJax.Message.Clear(n);
},
checkWebFont: function (check,font,callback) {
if (check.time(callback)) return;
if (HTMLCSS.Font.testFont(font)) {callback(check.STATUS.OK)}
else {setTimeout(check,check.delay)}
},
fontFace: function (name) {
var type = HTMLCSS.allowWebFonts;
var dir = AJAX.fileURL(HTMLCSS.webfontDir+"/"+type);
var fullname = name.replace(/-b/,"-B").replace(/-i/,"-I").replace(/-Bold-/,"-Bold");
if (!fullname.match(/-/)) {fullname += "-Regular"}
if (type === "svg") {fullname += ".svg#"+fullname} else {fullname += "."+type}
var def = {
"font-family": HTMLCSS.FONTDATA.FONTS[name].family,
src: "url('"+dir+"/"+fullname+"')"
};
if (type === "svg") def.src += " format('svg')";
if (!(HTMLCSS.FontFaceBug && HTMLCSS.FONTDATA.FONTS[name].isWebFont)) {
if (name.match(/-bold/)) {def["font-weight"] = "bold"}
if (name.match(/-italic/)) {def["font-style"] = "italic"}
}
return def;
}
});
HTMLCSS.Augment({
config: {
styles: {
".MathJax": {
"font-family": "serif",
"font-style": "normal",
"font-weight": "normal",
"line-height": "normal",
"font-size": "100%",
"text-indent": 0,
"text-align": "left",
"text-transform": "none",
"letter-spacing": "normal",
"word-spacing": "normal",
"word-wrap": "none",
"white-space": "nowrap",
border: 0, padding: 0, margin: 0,
"float": "none"
},
".MathJax_Display": {
position: "relative"
},
".MathJax span, .MathJax img, .MathJax nobr, .MathJax a": {
border: 0, padding: 0, margin: 0,
"vertical-align": 0,
"line-height": "normal",
"text-decoration": "none"
}
}
},
Font: FONTTEST(),
Config: function () {
MathJax.OutputJax.prototype.Config.call(this);
var font = this.Font.findFont(this.config.availableFonts,this.config.preferredFont);
if (!font && this.allowWebFonts) {font = this.config.webFont}
if (!font && this.config.imageFont) {font = this.config.imageFont; this.imgFonts = true}
if (font) {
this.fontInUse = font; this.fontDir += "/" + font; this.webfontDir += "/" + font;
if (!this.require) {this.require = []}
this.require.push(this.fontDir+"/fontdata.js");
if (this.imgFonts) {this.require.push(this.directory+"/imageFonts.js")}
} else {
MathJax.Message.Set("Can't find a valid font using ["+this.config.availableFonts.join(", ")+"]",null,3000);
this.FONTDATA = {
TeX_factor: 1, baselineskip: 1.2, lineH: .8, lineD: .2, ffLineH: .8,
FONTS: {}, VARIANT: {normal: {fonts:[]}}, RANGES: [],
DEFAULTFAMILY: "serif", DEFAULTWEIGHT: "normal", DEFAULTSTYLE: "normal",
DELIMITERS: {}, RULECHAR: 0x2D, REMAP: {}
};
MathJax.InputJax.TeX.Definitions.macros.overline[1] = "002D";
MathJax.InputJax.TeX.Definitions.macros.underline[1] = "002D";
}
},
Startup: function () {
// Set up default fonts
var MJ = this.config.styles[".MathJax"];
var family = [], fonts = this.FONTDATA.VARIANT.normal.fonts;
if (!(fonts instanceof Array)) {fonts = [fonts]}
for (var i = 0, m = fonts.length; i < m; i++) {
family[i] = this.FONTDATA.FONTS[fonts[i]].family;
if (!family[i]) {family[i] = fonts[i]}
}
MJ["font-family"] = family.join(',');
// Make hidden div for when math is in a display:none block
this.hiddenDiv = this.Element("div",{
style:{visibility:"hidden", overflow:"hidden", height:"1px",
position:"absolute", top:0}
});
if (!document.body.firstChild) {document.body.appendChild(this.hiddenDiv)}
else {document.body.insertBefore(this.hiddenDiv,document.body.firstChild)}
this.hiddenDiv = this.addElement(this.hiddenDiv,"div",{id:"MathJax_Hidden"});
// Determine pixels per inch
var div = this.addElement(this.hiddenDiv,"div",{style:{width:"5in"}});
this.pxPerInch = div.offsetWidth/5; this.hiddenDiv.removeChild(div);
// Markers used by getW
this.startMarker = HTMLCSS.createStrut(this.Element("span"),10,true);
this.endMarker = this.addText(this.Element("span"),"x").parentNode;
// Used in getHD
this.HDspan = this.Element("span");
if (this.operaHeightBug) {this.createStrut(this.HDspan,0)}
if (this.msieInlineBlockAlignBug) {
this.HDimg = this.addElement(this.HDspan,"img",{style:{height:"0px", width:"1px"}});
try {this.HDimg.src = "about:blank"} catch(err) {}
} else {
this.HDimg = HTMLCSS.createStrut(this.HDspan,0);
}
// Used in getScales
this.HDMspan = this.Element("span",{style: {position:"absolute"}});
if (this.msieInlineBlockAlignBug) {
this.HDMimg = this.addElement(this.HDMspan,"img",{style:{height:"0px",width:"1px"}});
try {this.HDMimg.src = "about:blank"} catch(err) {}
} else {
this.HDMimg = HTMLCSS.createStrut(this.HDMspan,0); this.HDMimg.style.marginRight = "";
}
// Used for computing factor to fix margin width in MSIE
this.marginCheck = HTMLCSS.Element("span");
HTMLCSS.addElement(this.marginCheck,"span",{style: {display:"inline-block", width:"5em"}});
this.marginMove = HTMLCSS.addElement(this.marginCheck,"span",
{style: {display:"inline-block", width:"5em", marginLeft:"-5em"}});
// Set up styles and preload web fonts
return MathJax.Ajax.Styles(this.config.styles,["PreloadWebFonts",this]);
},
PreloadWebFonts: function () {
if (!HTMLCSS.allowWebFonts || !HTMLCSS.config.preloadWebFonts) return;
for (var i = 0, m = HTMLCSS.config.preloadWebFonts.length; i < m; i++) {
var FONT = HTMLCSS.FONTDATA.FONTS[HTMLCSS.config.preloadWebFonts[i]];
if (!FONT.available) {HTMLCSS.Font.testFont(FONT)}
}
},
Translate: function (script) {
var math = script.MathJax.elementJax.root;
var span = this.Element("span",{className:"MathJax"}), div = span;
if (math.Get("display") === "block") {
div = this.Element("div",{className:"MathJax_Display", style:{width:"100%", position:"relative"}});
div.appendChild(span);
}
// (screen readers don't know about role="math" yet, so use "textbox" instead)
div.setAttribute("role","textbox"); div.setAttribute("aria-readonly","true");
script.parentNode.insertBefore(div,script);
this.getScales(div,span); var isHidden = (this.em === 0 || String(this.em) === "NaN");
if (isHidden) {this.hiddenDiv.appendChild(div); this.getScales(div,span)}
this.initImg(span);
this.initHTML(math,span);
math.setTeXclass();
try {math.toHTML(span,div)} catch (err) {
if (err.restart) {div.parentNode.removeChild(div)}
throw err;
}
if (isHidden) {script.parentNode.insertBefore(div,script)}
},
initImg: function (span) {},
initHTML: function (math,span) {},
initFont: function (name) {
var FONTS = HTMLCSS.FONTDATA.FONTS, AVAIL = HTMLCSS.config.availableFonts;
if (AVAIL && AVAIL.length && HTMLCSS.Font.testFont(FONTS[name]))
{FONTS[name].available = true; return null}
if (!this.allowWebFonts) {return null}
FONTS[name].isWebFont = true;
if (HTMLCSS.FontFaceBug) {FONTS[name].family = name}
return AJAX.Styles({"@font-face":this.Font.fontFace(name)});
},
Remove: function (jax) {
var span = jax.SourceElement(); if (!span) return;
span = span.previousSibling; if (!span) return;
if (span.className.match(/^MathJax/)) {span.parentNode.removeChild(span)}
},
getScales: function (span,mj) {
span.parentNode.insertBefore(this.HDMspan,span);
this.HDMspan.className = "";
this.HDMimg.style.height = "1px"; this.HDMimg.style.width = "60ex";
var ex = this.HDMspan.offsetWidth/60;
this.HDMspan.className = "MathJax"; this.HDMimg.style.width = "60em";
var em = this.HDMspan.offsetWidth/60;
var scale = Math.floor((ex/this.TeX.x_height) / em * this.config.scale);
mj.style.fontSize = this.HDMspan.style.fontSize = scale+"%";
this.em = MML.mbase.prototype.em = this.HDMspan.offsetWidth/60;
span.parentNode.removeChild(this.HDMspan);
this.msieMarginScale = this.getMarginScale(mj);
},
getMarginScale: function (span) {return 1},
getMSIEmarginScale: function (span) {
span.appendChild(this.marginCheck);
var W = this.marginCheck.offsetWidth, w = this.marginMove.offsetWidth;
var scale = w/(2*w - W);
span.removeChild(this.marginCheck);
return scale;
},
getHD: function (span) {
var position = span.style.position;
span.style.position = "absolute";
this.HDimg.style.height = "0px";
span.appendChild(this.HDspan);
var HD = {h:span.offsetHeight};
this.HDimg.style.height = HD.h+"px";
HD.d = span.offsetHeight - HD.h; HD.h -= HD.d;
HD.h /= this.em; HD.d /= this.em;
span.removeChild(this.HDspan);
span.style.position = position;
return HD;
},
getW: function (span) {
var W = span.offsetWidth, w = (span.bbox ? span.bbox.w: -1), start = span;
if ((w < 0 || this.negativeSkipBug) && W >= 0) {
// IE can't deal with a space at the beginning, so put something else first
if (this.negativeSkipBug) {
var position = span.style.position; span.style.position = "absolute";
start = this.startMarker;
if (span.firstChild) {span.insertBefore(start,span.firstChild)}
else {span.appendChild(start)}
start = this.startMarker;
}
span.appendChild(this.endMarker);
W = this.endMarker.offsetLeft - start.offsetLeft;
span.removeChild(this.endMarker);
if (this.negativeSkipBug) {
span.removeChild(start);
span.style.position = position;
}
}
return W/this.em;
},
Measured: function (span,parent) {
if (span.bbox.width == null && span.bbox.w) {
var w = this.getW(span);
span.bbox.rw += w - span.bbox.w;
span.bbox.w = w;
}
if (!parent) {parent = span.parentNode}
if (!parent.bbox) {parent.bbox = span.bbox}
return span;
},
Remeasured: function (span,parent) {
parent.bbox = this.Measured(span,parent).bbox;
},
Em: function (m) {
if (Math.abs(m) < .0006) {return "0em"}
return (m < 0 ? "-" : "")+String(Math.abs(m)+.0005).replace(/(\.\d\d\d).+/,'$1') + "em";
},
Percent: function (m) {
return String(m*100+.5).replace(/\..+/,'') + "%";
},
length2percent: function (length) {
return this.Percent(this.length2em(length));
},
length2em: function (length,size) {
if (typeof(length) !== "string") {length = length.toString()}
if (length === "") {return ""}
if (length === MML.SIZE.NORMAL) {return 1}
if (length === MML.SIZE.BIG) {return 2}
if (length === MML.SIZE.SMALL) {return .71}
if (length === "infinity") {return HTMLCSS.BIGDIMEN}
var factor = this.FONTDATA.TeX_factor;
if (length.match(/mathspace$/)) {return HTMLCSS.MATHSPACE[length]*factor}
var match = length.match(/^\s*([-+]?(?:\.\d+|\d+(?:\.\d*)?))?(pt|em|ex|mu|px|in|mm|cm|%)?/);
var m = parseFloat(match[1]||"1"), unit = match[2];
if (size == null) {size = 1}
if (unit === "em") {return m * factor}
if (unit === "ex") {return m * HTMLCSS.TeX.x_height * factor}
if (unit === "%") {return m / 100 * size}
if (unit === "px") {return m / HTMLCSS.em}
if (unit === "pt") {return m / 10 * factor} // 10 pt to an em
if (unit === "in") {return m * this.pxPerInch / HTMLCSS.em}
if (unit === "cm") {return m * this.pxPerInch / HTMLCSS.em / 2.54} // 2.54 cm to an inch
if (unit === "mm") {return m * this.pxPerInch / HTMLCSS.em / 25.4} // 10 mm to a cm
if (unit === "pc") {return m * this.pxPerInch / HTMLCSS.em / 12} // 12 pc to an inch
if (unit === "mu") {return m / 18 * factor} // FIXME: needs to include scale
return m*factor*size; // relative to given size (or 1em as default)
},
thickness2em: function (length) {
var thick = HTMLCSS.TeX.rule_thickness;
if (length === MML.LINETHICKNESS.MEDIUM) {return thick}
if (length === MML.LINETHICKNESS.THIN) {return .67*thick}
if (length === MML.LINETHICKNESS.THICK) {return 1.67*thick}
return this.length2em(length,thick);
},
createStrut: function (span,h,before) {
var strut = this.Element("span",{
style:{display:"inline-block", overflow:"hidden", height:h+"px",
width:"1px", marginRight:"-1px"}
});
if (before) {span.insertBefore(strut,span.firstChild)} else {span.appendChild(strut)}
return strut;
},
createBlank: function (span,w,before) {
var blank = this.Element("span",{
style: {display:"inline-block", overflow:"hidden", height:"1px", width:this.Em(w)}
});
if (before) {span.insertBefore(blank,span.firstChild)} else {span.appendChild(blank)}
return blank;
},
createShift: function (span,w,before) {
var space = this.Element("span",{style:{marginLeft:this.Em(w)}});
if (before) {span.insertBefore(space,span.firstChild)} else {span.appendChild(space)}
return space;
},
createSpace: function (span,h,d,w,color) {
var H = this.Em(Math.max(0,h+d)), D = this.Em(-d);
if (this.msieInlineBlockAlignBug) {D = this.Em(HTMLCSS.getHD(span.parentNode).d-d)}
if (span.isBox || span.className == "mspace") {
span.bbox = {
h: h*span.scale, d: d*span.scale,
w: w*span.scale, rw: w*span.scale, lw: 0
};
span.style.height = H; span.style.verticalAlign = D;
} else {
span = this.addElement(span,"span",{style: {height:H, verticalAlign:D}});
}
if (w >= 0) {
span.style.width = this.Em(w);
span.style.display = "inline-block";
} else {
if (this.msieNegativeSpaceBug) {span.style.height = ""}
span.style.marginLeft = this.Em(w);
if (HTMLCSS.safariNegativeSpaceBug && span.parentNode.firstChild == span)
{this.createBlank(span,0,true)}
}
if (color && color !== MML.COLOR.TRANSPARENT) {span.style.backgroundColor = color}
return span;
},
createRule: function (span,h,d,w,color) {
var min = HTMLCSS.TeX.min_rule_thickness;
// If rule is very thin, make it at least min_rule_thickness so it doesn't disappear
if (w > 0 && w*this.em < min) {w = min/this.em}
if (h+d > 0 && (h+d)*this.em < min) {var f = 1/(h+d)*(min/this.em); h *= f; d *= f}
if (!color) {color = "solid"} else {color = "solid "+color}
color = this.Em(w)+" "+color;
var H = this.Em(h+d), D = this.Em(-d);
if (span.isBox || span.className == "mspace") {span.bbox = {h:h, d:d, w:w, rw:w, lw: 0}}
span = this.addElement(span,"span",{
style: {borderLeft: color, display: "inline-block", overflow:"hidden",
width:0, height:H, verticalAlign:D}
});
if (w > 0 && span.offsetWidth == 0) {span.style.width = this.Em(w)}
return span;
},
createStack: function (span,nobbox,w) {
if (this.msiePaddingWidthBug) {this.createStrut(span,0)}
span = this.addElement(span,"span",{
style: {display:"inline-block", position:"relative",
width:(w == null ? 0: "100%"), height:0}
});
if (!nobbox) {
span.parentNode.bbox = span.bbox = {
h: -this.BIGDIMEN, d: -this.BIGDIMEN,
w:0, lw: this.BIGDIMEN, rw: -this.BIGDIMEN
};
if (w != null) {span.bbox.width = span.parentNode.bbox.width = w}
}
return span;
},
createBox: function (span,w) {
var box = this.addElement(span,"span",{style:{position:"absolute"}, isBox: true});
if (w != null) {box.style.width = w}
return box;
},
addBox: function (span,box) {
box.style.position = "absolute"; box.isBox = true;
return span.appendChild(box);
},
placeBox: function (span,x,y,noclip) {
var parent = span.parentNode, bbox = span.bbox, BBOX = parent.bbox;
if (this.msiePlaceBoxBug) {this.addText(span,this.NBSP)}
if (this.imgSpaceBug) {this.addText(span,this.imgSpace)}
var HD = this.getHD(span), dx = 0;
// Make sure vertical alignment of baseline is correct
span.style.top = this.Em(-HD.h);
if (-span.offsetTop !== Math.floor(HD.h*this.em+.5))
{HD.h += .95*Math.floor(HD.h*this.em+span.offsetTop+.5)/this.em};
// Clip so that bbox doesn't include extra height and depth
if (bbox) {
if (this.negativeSkipBug) {
if (bbox.lw < 0) {dx = bbox.lw; HTMLCSS.createBlank(span,-dx,true); l = 0}
if (bbox.rw > bbox.w) {HTMLCSS.createBlank(span,bbox.rw-bbox.w+.1)}
}
if (!this.msieClipRectBug && !bbox.noclip && !noclip) {
var dd = 3/this.em;
var H = (bbox.H == null ? bbox.h : bbox.H), D = (bbox.D == null ? bbox.d : bbox.D);
var t = HD.h - H - dd, b = HD.h + D + dd, l = bbox.lw - 3*dd, r = 1000;
span.style.clip = "rect("+this.Em(t)+" "+this.Em(r)+" "+this.Em(b)+" "+this.Em(l)+")";
}
}
// Place the box
span.style.left = this.Em(x+dx);
span.style.top = this.Em(-(y+HD.h));
// Update the bounding box
if (bbox && BBOX) {
if (bbox.H != null && (BBOX.H == null || bbox.H + y > BBOX.H)) {BBOX.H = bbox.H + y}
if (bbox.D != null && (BBOX.D == null || bbox.D - y > BBOX.D)) {BBOX.D = bbox.D - y}
if (bbox.h + y > BBOX.h) {BBOX.h = bbox.h + y}
if (bbox.d - y > BBOX.d) {BBOX.d = bbox.d - y}
if (BBOX.H != null && BBOX.H <= BBOX.h) {delete BBOX.H}
if (BBOX.D != null && BBOX.D <= BBOX.d) {delete BBOX.D}
if (bbox.w + x > BBOX.w) {
BBOX.w = bbox.w + x;
if (BBOX.width == null) {parent.style.width = this.Em(BBOX.w)}
}
if (bbox.rw + x > BBOX.rw) {BBOX.rw = bbox.rw + x}
if (bbox.lw + x < BBOX.lw) {BBOX.lw = bbox.lw + x}
// FIXME: deal with non-percent widths
if (bbox.width != null) {
if (BBOX.width == null) {parent.style.width = BBOX.width = "100%"}
span.style.width = bbox.width;
}
}
},
alignBox: function (span,align,y) {
this.placeBox(span,0,y); // set y position (and left aligned)
var r = 0, c = -span.bbox.w/2;
if (this.negativeSkipBug) {r = span.bbox.w-span.bbox.rw-.1; c += span.bbox.lw}
// FIXME: handle width that is not a percent
c = (span.bbox.width ? "-"+Math.floor(parseInt(span.bbox.width)/2)+"%" :
this.Em(c*this.msieMarginScale));
MathJax.Hub.Insert(span.style,({
right: {left:"", right: this.Em(r)},
center: {left:"50%", marginLeft: c}
})[align]);
},
setStackWidth: function (span,w) {
if (typeof(w) === "number") {
span.style.width = this.Em(Math.max(0,w));
if (span.bbox) {span.bbox.w = w};
if (span.parentNode.bbox) {span.parentNode.bbox.w = w}
} else {
span.style.width = span.parentNode.style.width = "100%";
if (span.bbox) {span.bbox.width = w}
if (span.parentNode.bbox) {span.parentNode.bbox.width = w}
}
},
createDelimiter: function (span,code,HW,scale,font) {
if (!code) {
span.bbox = {h:0, d:0, w:this.TeX.nulldelimiterspace, lw: 0};
span.bbox.rw = span.bbox.w;
this.createSpace(span,span.bbox.h,span.bbox.d,span.bbox.w);
return;
}
if (!scale) {scale = 1};
if (!(HW instanceof Array)) {HW = [HW,HW]}
var hw = HW[1]; HW = HW[0];
var delim = {alias: code};
while (delim.alias) {
code = delim.alias; delim = this.FONTDATA.DELIMITERS[code];
if (!delim) {delim = {HW: [0,this.FONTDATA.VARIANT[MML.VARIANT.NORMAL]]}}
}
for (var i = 0, m = delim.HW.length; i < m; i++) {
if (delim.HW[i][0]*scale >= HW-.01 || (i == m-1 && !delim.stretch)) {
if (delim.HW[i][2]) {scale *= delim.HW[i][2]}
if (delim.HW[i][3]) {code = delim.HW[i][3]}
var chr = this.addElement(span,"span");
this.createChar(chr,[code,delim.HW[i][1]],scale,font);
span.bbox = chr.bbox;
span.offset = .65 * span.bbox.w;
span.scale = scale;
return;
}
}
if (delim.stretch) {this["extendDelimiter"+delim.dir](span,hw,delim.stretch,scale,font)}
},
extendDelimiterV: function (span,H,delim,scale,font) {
var stack = this.createStack(span,true);
var top = this.createBox(stack), bot = this.createBox(stack);
this.createChar(top,(delim.top||delim.ext),scale,font);
this.createChar(bot,(delim.bot||delim.ext),scale,font);
var ext = {bbox:{w:0,lw:0,rw:0}}, mid = ext;
var h = top.bbox.h + top.bbox.d + bot.bbox.h + bot.bbox.d;
var y = -top.bbox.h; this.placeBox(top,0,y,true); y -= top.bbox.d;
if (delim.mid) {
mid = this.createBox(stack); this.createChar(mid,delim.mid,scale,font);
h += mid.bbox.h + mid.bbox.d;
}
if (H > h) {
ext = this.Element("span"); this.createChar(ext,delim.ext,scale,font);
var eH = ext.bbox.h + ext.bbox.d, eh = eH - .05, n, N, k = (delim.mid ? 2 : 1);
N = n = Math.ceil((H-h)/(k*eh));
if (!delim.fullExtenders) {eh = (H-h)/(k*n)}
var dy = (n/(n+1))*(eH - eh); eh = eH - dy; y += dy + eh - ext.bbox.h;
while (k-- > 0) {
while (n-- > 0) {y -= eh; this.placeBox(this.addBox(stack,ext.cloneNode(true)),0,y,true)}
y += dy - ext.bbox.d;
if (delim.mid && k) {
this.placeBox(mid,0,y-mid.bbox.h,true); n = N;
y += -(mid.bbox.h + mid.bbox.d) + dy + eh - ext.bbox.h;
}
}
} else {
y += (h - H)/2;
if (delim.mid) {this.placeBox(mid,0,y-mid.bbox.h,true); y += -(mid.bbox.h + mid.bbox.d)}
y += (h - H)/2;
}
this.placeBox(bot,0,y-bot.bbox.h,true); y -= bot.bbox.h + bot.bbox.d;
span.bbox = {
w: Math.max(top.bbox.w,ext.bbox.w,bot.bbox.w,mid.bbox.w),
lw: Math.min(top.bbox.lw,ext.bbox.lw,bot.bbox.lw,mid.bbox.lw),
rw: Math.max(top.bbox.rw,ext.bbox.rw,bot.bbox.rw,mid.bbox.rw),
h: 0, d: -y
}
span.scale = scale;
span.offset = .55 * span.bbox.w;
span.isMultiChar = true;
this.setStackWidth(stack,span.bbox.w);
},
extendDelimiterH: function (span,W,delim,scale,font) {
var stack = this.createStack(span,true);
var left = this.createBox(stack), right = this.createBox(stack);
this.createChar(left,(delim.left||delim.rep),scale,font);
this.createChar(right,(delim.right||delim.rep),scale,font);
var rep = this.Element("span"); this.createChar(rep,delim.rep,scale,font);
var mid = {bbox: {h:-this.BIGDIMEN, d:-this.BIGDIMEN}};
this.placeBox(left,-left.bbox.lw,0,true);
var w = (left.bbox.rw - left.bbox.lw) + (right.bbox.rw - right.bbox.lw) - .05,
x = left.bbox.rw - left.bbox.lw - .025;
if (delim.mid) {
mid = this.createBox(stack); this.createChar(mid,delim.mid,scale,font);
w += mid.bbox.w;
}
if (W > w) {
var rW = rep.bbox.rw-rep.bbox.lw, rw = rW - .05, n, N, k = (delim.mid ? 2 : 1);
N = n = Math.ceil((W-w)/(k*rw)); rw = (W-w)/(k*n);
var dx = (n/(n+1))*(rW - rw); rw = rW - dx; x -= rep.bbox.lw + dx;
while (k-- > 0) {
while (n-- > 0) {this.placeBox(this.addBox(stack,rep.cloneNode(true)),x,0,true); x += rw}
if (delim.mid && k) {this.placeBox(mid,x,0,true); x += mid.bbox.w - dx; n = N}
}
} else {
x -= (w - W)/2;
if (delim.mid) {this.placeBox(mid,x,0,true); x += mid.bbox.w}
x -= (w - W)/2;
}
this.placeBox(right,x,0,true);
span.bbox = {
w: x+right.bbox.rw, lw: 0, rw: x+right.bbox.rw,
H: Math.max(left.bbox.h,rep.bbox.h,right.bbox.h,mid.bbox.h),
D: Math.max(left.bbox.d,rep.bbox.d,right.bbox.d,mid.bbox.d),
h: rep.bbox.h, d: rep.bbox.d
}
span.scale = scale;
span.isMultiChar = true;
this.setStackWidth(stack,span.bbox.w);
},
createChar: function (span,data,scale,font) {
var SPAN = span, text = "", variant = {fonts: [data[1]], noRemap:true};
if (font && font === MML.VARIANT.BOLD) {variant.fonts = [data[1]+"-bold",data[1]]}
if (typeof(data[1]) !== "string") {variant = data[1]}
if (data[0] instanceof Array) {
for (var i = 0, m = data[0].length; i < m; i++) {text += String.fromCharCode(data[0][i])}
} else {text = String.fromCharCode(data[0])}
if (scale !== 1) {
SPAN = this.addElement(span,"span",{style:{fontSize: this.Percent(scale)}, scale:scale});
this.handleVariant(SPAN,variant,text);
span.bbox = SPAN.bbox;
} else {this.handleVariant(span,variant,text)}
if (data[2]) {span.style.marginLeft = this.Em(data[2])}
if (this.AccentBug && span.bbox.w === 0) {
// Handle combining characters by adding a non-breaking space and removing that width
SPAN.firstChild.nodeValue += this.NBSP;
HTMLCSS.createSpace(span,0,0,-span.offsetWidth/HTMLCSS.em);
}
},
positionDelimiter: function (span,h) {
h -= span.bbox.h; span.bbox.d -= h; span.bbox.h += h;
if (h) {
if (this.safariVerticalAlignBug || this.msieVerticalAlignBug || this.konquerorVerticalAlignBug ||
(this.operaVerticalAlignBug && span.isMultiChar)) {
if (span.firstChild.style.display === "" && span.style.top !== "")
{span = span.firstChild; h -= parseFloat(span.style.top)}
span.style.position = "relative";
span.style.top = this.Em(-h);
} else {
span.style.verticalAlign = this.Em(h);
if (HTMLCSS.ffVerticalAlignBug) {HTMLCSS.createRule(span.parentNode,span.bbox.h,0,0)}
}
}
},
handleVariant: function (span,variant,text) {
var newtext = "", n, c, C, font, noVariant = 1, VARIANT;
if (text.length === 0) return;
if (!span.bbox) {
span.bbox = {
w: 0, h: -this.BIGDIMEN, d: -this.BIGDIMEN,
rw: -this.BIGDIMEN, lw: this.BIGDIMEN
};
}
if (!variant) {variant = this.FONTDATA.VARIANT[MML.VARIANT.NORMAL]}
VARIANT = variant;
for (var i = 0, m = text.length; i < m; i++) {
variant = VARIANT;
n = text.charCodeAt(i); c = text.charAt(i);
if (c == this.PLANE1) {
i++; n = text.charCodeAt(i) + 0x1D400 - 0xDC00;
} else {
var id, M, RANGES = this.FONTDATA.RANGES;
for (id = 0, M = RANGES.length; id < M; id++) {
if (RANGES[id].name === "alpha" && variant.noLowerCase) continue;
var N = variant["offset"+RANGES[id].offset];
if (N && n >= RANGES[id].low && n <= RANGES[id].high) {
if (RANGES[id].remap && RANGES[id].remap[n]) {
n = N + RANGES[id].remap[n];
} else {
n = n - RANGES[id].low + N;
if (RANGES[id].add) {n += RANGES[id].add}
}
if (variant["variant"+RANGES[id].offset])
{variant = this.FONTDATA.VARIANT[variant["variant"+RANGES[id].offset]]}
break;
}
}
}
if (variant.remap && variant.remap[n]) {
if (variant.remap[n] instanceof Array) {
var remap = variant.remap[n];
n = remap[0]; variant = this.FONTDATA.VARIANT[remap[1]];
} else {
n = variant.remap[n];
if (variant.remap.variant) {variant = this.FONTDATA.VARIANT[variant.remap.variant]}
}
}
if (this.FONTDATA.REMAP[n] && !variant.noRemap) {n = this.FONTDATA.REMAP[n]}
font = this.lookupChar(variant,n); c = font[n];
if (noVariant && !c[5].img) {this.handleFont(span,font); noVariant = 1}
newtext = this.handleChar(span,font,c,n,newtext);
if (c[0]/1000 > span.bbox.h) {span.bbox.h = c[0]/1000}
if (c[1]/1000 > span.bbox.d) {span.bbox.d = c[1]/1000}
if (span.bbox.w + c[3]/1000 < span.bbox.lw) {span.bbox.lw = span.bbox.w + c[3]/1000}
if (span.bbox.w + c[4]/1000 > span.bbox.rw) {span.bbox.rw = span.bbox.w + c[4]/1000}
span.bbox.w += c[2]/1000;
}
if (newtext.length) {this.addText(span,newtext)}
if (span.scale && span.scale !== 1) {
span.bbox.h *= span.scale; span.bbox.d *= span.scale;
span.bbox.w *= span.scale; span.bbox.lw *= span.scale; span.bbox.rw *= span.scale;
}
if (text.length == 1 && font.skew && font.skew[n]) {span.bbox.skew = font.skew[n]}
},
handleFont: function (span,font) {
span.style.fontFamily = font.family;
if (!(HTMLCSS.FontFaceBug && font.isWebFont)) {
var style = font.style || this.FONTDATA.DEFAULTSTYLE,
weight = font.weight || this.FONTDATA.DEFAULTWEIGHT;
if (style !== "normal") {span.style.fontStyle = style}
if (weight !== "normal") {span.style.fontWeight = weight}
}
},
handleChar: function (span,font,c,n,text) {
var C = c[5];
if (C.img) {return this.handleImg(span,font,c,n,text)}
if (C.c == null) {
if (n <= 0xFFFF) {C.c = String.fromCharCode(n)}
else {C.c = this.PLANE1 + String.fromCharCode(n-0x1D400+0xDC00)}
}
if (c[2] || !this.msieAccentBug || text.length) {return text + C.c}
// Handle IE accent clipping bug
HTMLCSS.createShift(span,c[3]/1000);
HTMLCSS.createShift(span,(c[4]-c[3])/1000);
this.addText(span,C.c);
HTMLCSS.createShift(span,-c[4]/1000);
return "";
},
handleImg: function (span,font,c,n,text) {return text}, // replaced by imageFont extension
lookupChar: function (variant,n) {
var i, m;
if (!variant.FONTS) {
var FONTS = this.FONTDATA.FONTS;
var fonts = (variant.fonts || this.FONTDATA.VARIANT.normal.fonts);
if (!(fonts instanceof Array)) {fonts = [fonts]}
if (variant.fonts != fonts) {variant.fonts = fonts}
variant.FONTS = [];
for (i = 0, m = fonts.length; i < m; i++) {
if (FONTS[fonts[i]]) {
variant.FONTS.push(FONTS[fonts[i]]);
FONTS[fonts[i]].name = fonts[i]; // FIXME: should really be in the font files
}
}
}
for (i = 0, m = variant.FONTS.length; i < m; i++) {
var font = variant.FONTS[i];
if (typeof(font) === "string") {
delete variant.FONTS; this.loadFont(font);
}
if (font[n]) {
if (font[n].length === 5) {font[n][5] = {}}
if (HTMLCSS.allowWebFonts && !font.available)
{this.loadWebFont(font)} else {return font}
} else {this.findBlock(font,n)}
}
var unknown = (variant.defaultFont || {family:HTMLCSS.FONTDATA.DEFAULTFAMILY+",serif"});
unknown[n] = [800,200,500,0,500,{isUnknown:true}]; // [h,d,w,lw,rw,{data}]
return unknown;
},
findBlock: function (font,c) {
if (font.Ranges) {
// FIXME: do binary search?
for (var i = 0, m = font.Ranges.length; i < m; i++) {
if (c < font.Ranges[i][0]) return;
if (c <= font.Ranges[i][1]) {
var file = font.Ranges[i][2];
for (var j = font.Ranges.length-1; j >= 0; j--)
{if (font.Ranges[j][2] == file) {font.Ranges.splice(j,1)}}
this.loadFont(font.directory+"/"+file+".js");
}
}
}
},
loadFont: function (file) {
var queue = MathJax.CallBack.Queue();
queue.Push(["Require",MathJax.Ajax,this.fontDir+"/"+file]);
if (this.imgFonts) {queue.Push(["Require",MathJax.Ajax,this.webfontDir+"/png/"+file])}
MathJax.Hub.RestartAfter(queue.Push({}));
},
loadWebFont: function (font) {
font.available = font.isWebFont = true;
if (HTMLCSS.FontFaceBug) {font.family = font.name}
var callback = this.Font.loadWebFont(font);
MathJax.Hub.RestartAfter(callback);
},
Element: function (type,def) {
var obj = document.createElement(type);
for (var i = 1, m = arguments.length; i < m; i++) {
if (arguments[i]) {MathJax.Hub.Insert(obj,arguments[i]);}
}
return obj;
},
addElement: function (span,type,def) {return span.appendChild(this.Element(type,def))},
TextNode: function (text) {return document.createTextNode(text)},
addText: function (span,text) {return span.appendChild(this.TextNode(text))},
BIGDIMEN: 10000000,
ID: 0,
GetID: function () {this.ID++; return this.ID},
MATHSPACE: {
veryverythinmathspace: 1/18,
verythinmathspace: 2/18,
thinmathspace: 3/18,
mediummathspace: 4/18,
thickmathspace: 5/18,
verythickmathspace: 6/18,
veryverythickmathspace: 7/18,
negativeveryverythinmathspace: -1/18,
negativeverythinmathspace: -2/18,
negativethinmathspace: -3/18,
negativemediummathspace: -4/18,
negativethickmathspace: -5/18,
negativeverythickmathspace: -6/18,
negativeveryverythickmathspace: -7/18
},
TeX: {
x_height: .430554,
quad: 1,
num1: .676508,
num2: .393732,
num3: .44373,
denom1: .685951,
denom2: .344841,
sup1: .412892,
sup2: .362892,
sup3: .288888,
sub1: .15,
sub2: .247217,
sup_drop: .386108,
sub_drop: .05,
delim1: 2.39,
delim2: 1.0,
axis_height: .25,
rule_thickness: .06,
big_op_spacing1: .111111,
big_op_spacing2: .166666,
big_op_spacing3: .2,
big_op_spacing4: .6,
big_op_spacing5: .1,
scriptspace: .1,
nulldelimiterspace: .12,
delimiterfactor: 901,
delimitershortfall: .1, // originally .3,
min_rule_thickness: 1.25 // in pixels
},
PLANE1: String.fromCharCode(0xD835),
NBSP: String.fromCharCode(0xA0),
rfuzz: 0 // adjustment to rule placements in roots
});
MML.mbase.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {this.data[i].toHTML(span)}}
var stretchy = this.HTMLcomputeBBox(span);
var h = span.bbox.h, d = span.bbox.d;
for (i = 0, m = stretchy.length; i < m; i++) {stretchy[i].HTMLstretchV(span,h,d)}
if (stretchy.length) {this.HTMLcomputeBBox(span,true)}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLcomputeBBox: function (span,full) {
var i, m, child, bbox, BBOX, hasDimens = 0, width, stretchy = [];
BBOX = span.bbox = {};
for (i = 0, m = this.data.length; i < m; i++) {
var core = this.data[i]; if (!core) continue;
if (!full && core.HTMLcanStretch("Vertical"))
{stretchy.push(core); core = (core.CoreMO()||core)}
this.HTMLcombineBBoxes(core,BBOX);
}
this.HTMLcleanBBox(BBOX);
return stretchy;
},
HTMLcombineBBoxes: function (core,BBOX) {
if (BBOX.w == null) {
BBOX.h = BBOX.d = BBOX.H = BBOX.D = BBOX.rw = -HTMLCSS.BIGDIMEN;
BBOX.w = 0; BBOX.lw = HTMLCSS.BIGDIMEN;
}
var child = core.HTMLspanElement(); if (!child || !child.bbox) return;
var bbox = child.bbox;
if (bbox.d > BBOX.d) {BBOX.d = bbox.d}
if (bbox.h > BBOX.h) {BBOX.h = bbox.h}
if (bbox.D != null && bbox.D > BBOX.D) {BBOX.D = bbox.D}
if (bbox.H != null && bbox.H > BBOX.H) {BBOX.H = bbox.H}
if (child.style.paddingLeft) {BBOX.w += parseFloat(child.style.paddingLeft)*(child.scale||1)}
if (BBOX.w + bbox.lw < BBOX.lw) {BBOX.lw = BBOX.w + bbox.lw}
if (BBOX.w + bbox.rw > BBOX.rw) {BBOX.rw = BBOX.w + bbox.rw}
BBOX.w += bbox.w;
if (child.style.paddingRight) {BBOX.w += parseFloat(child.style.paddingRight)*(child.scale||1)}
if (bbox.width) {BBOX.width = bbox.width}
},
HTMLcleanBBox: function (BBOX) {
if (BBOX.h === this.BIGDIMEN)
{BBOX.h = BBOX.d = BBOX.H = BBOX.D = BBOX.w = BBOX.rw = BBOX.lw = 0}
if (BBOX.D <= BBOX.d) {delete BBOX.D}; if (BBOX.H <= BBOX.h) {delete BBOX.H}
},
HTMLcanStretch: function (direction) {
if (this.isEmbellished()) {return this.Core().HTMLcanStretch(direction)}
return false;
},
HTMLstretchH: function (box,W) {return this.HTMLspanElement()},
HTMLstretchV: function (box,h,d) {return this.HTMLspanElement()},
HTMLcreateSpan: function (span) {
if (this.spanID) {
var SPAN = this.HTMLspanElement();
if (SPAN) {
while (SPAN.firstChild) {SPAN.removeChild(SPAN.firstChild)}
SPAN.bbox = {w:0, h:0, d:0, lw:0, rw:0};
SPAN.scale = 1; SPAN.isMultChar = null;
SPAN.style.cssText = "";
return SPAN;
}
}
if (this.href) {span = HTMLCSS.addElement(span,"a",{href:this.href})}
span = HTMLCSS.addElement(span,"span",{className: this.type});
if (HTMLCSS.imgHeightBug) {span.style.display = "inline-block"}
if (this["class"] != null) {span.className += " "+this["class"]}
if (this.style) {span.style.cssText = this.style}
this.spanID = HTMLCSS.GetID(); span.id = (this.id || "MathJax-Span-"+this.spanID);
span.bbox = {w:0, h:0, d:0, lw:0, lr:0};
if (this.href) {span.parentNode.bbox = span.bbox}
return span;
},
HTMLspanElement: function () {
if (!this.spanID) {return null}
return document.getElementById(this.id || "MathJax-Span-"+this.spanID);
},
HTMLhandleVariant: function (span,variant,text) {HTMLCSS.handleVariant(span,variant,text)},
HTMLhandleSize: function (span) {
if (!span.scale) {
span.scale = this.HTMLgetScale();
if (span.scale !== 1) {span.style.fontSize = HTMLCSS.Percent(span.scale)}
}
return span;
},
HTMLhandleColor: function (span) {
var values = this.getValues("mathcolor","color");
if (this.mathbackground) {values.mathbackground = this.mathbackground}
if (this.background) {values.background = this.background}
if (this.style && span.style.backgroundColor) {values.mathbackground = span.style.backgroundColor}
if (values.color && !this.mathcolor) {values.mathcolor = values.color}
if (values.background && !this.mathbackground) {values.mathbackground = values.background}
if (values.mathcolor) {span.style.color = values.mathcolor}
if (values.mathbackground && values.mathbackground !== MML.COLOR.TRANSPARENT) {
var dd = 1/HTMLCSS.em, lW = 0, rW = 0;
if (this.isToken) {lW = span.bbox.lw; rW = span.bbox.rw - span.bbox.w}
if (span.style.paddingLeft !== "") {lW += parseFloat(span.style.paddingLeft)*(span.scale||1)}
if (span.style.paddingRight !== "") {rW -= parseFloat(span.style.paddingRight)*(span.scale||1)}
var W = Math.max(0,HTMLCSS.getW(span) + (HTMLCSS.PaddingWidthBug ? 0 : rW - lW));
if (HTMLCSS.msieCharPaddingWidthBug && span.style.paddingLeft !== "")
{W += parseFloat(span.style.paddingLeft)*(span.scale||1)}
var H = span.bbox.h + span.bbox.d, D = -span.bbox.d;
if (W > 0) {W += 2*dd; lW -= dd}; if (H > 0) {H += 2*dd; D -= dd}; rW = -W-lW;
var frame = HTMLCSS.Element("span",{id:"MathJax-Color-"+this.spanID,
style:{display:"inline-block", backgroundColor:values.mathbackground,
width: HTMLCSS.Em(W), height:HTMLCSS.Em(H), verticalAlign: HTMLCSS.Em(D),
marginLeft: HTMLCSS.Em(lW), marginRight: HTMLCSS.Em(rW)}
});
if (HTMLCSS.msieInlineBlockAlignBug) {
frame.style.position = "relative"; frame.style.width = frame.style.height = 0;
frame.style.verticalAlign = frame.style.marginLeft = frame.style.marginRight = "";
HTMLCSS.placeBox(HTMLCSS.addElement(frame,"span",{
style: {display:"inline-block", position:"absolute", overflow:"hidden",
width: HTMLCSS.Em(W), height: HTMLCSS.Em(H),
background: values.mathbackground}
}),lW,span.bbox.h+dd);
} else {
}
span.parentNode.insertBefore(frame,span);
}
},
HTMLremoveColor: function () {
var color = document.getElementById("MathJax-Color-"+this.spanID);
if (color) {color.parentNode.removeChild(color)}
},
HTMLhandleSpace: function (span) {
if (this.useMMLspacing) {
if (this.type !== "mo") return;
var values = this.getValues("scriptlevel","lspace","rspace");
if (values.scriptlevel <= 0 || this.hasValue("lspace") || this.hasValue("rspace")) {
values.lspace = Math.max(0,HTMLCSS.length2em(values.lspace));
values.rspace = Math.max(0,HTMLCSS.length2em(values.rspace));
var core = this, parent = this.Parent();
while (parent && parent.isEmbellished() && parent.Core() === core)
{core = parent; parent = parent.Parent(); span = core.HTMLspanElement()}
if (values.lspace) {span.style.paddingLeft = HTMLCSS.Em(values.lspace)}
if (values.rspace) {span.style.paddingRight = HTMLCSS.Em(values.rspace)}
}
} else {
var space = this.texSpacing();
if (space !== "") {
space = HTMLCSS.length2em(space)/(span.scale||1);
if (span.style.paddingLeft) {space += parseFloat(span.style.paddingLeft)}
span.style.paddingLeft = HTMLCSS.Em(space);
}
}
},
HTMLgetScale: function () {
var scale = 1, values = this.getValues("mathsize","scriptlevel","fontsize","scriptminsize");
if (this.style) {
var span = this.HTMLspanElement();
if (span.style.fontSize != "") {values.fontsize = span.style.fontSize}
}
if (values.fontsize && !this.mathsize) {values.mathsize = values.fontsize}
if (values.scriptlevel !== 0) {
if (values.scriptlevel > 2) {values.scriptlevel = 2}
scale = Math.pow(this.Get("scriptsizemultiplier"),values.scriptlevel);
values.scriptminsize = HTMLCSS.length2em(values.scriptminsize);
if (scale < values.scriptminsize) {scale = values.scriptminsize}
}
scale *= HTMLCSS.length2em(values.mathsize);
return scale;
},
HTMLgetVariant: function () {
var values = this.getValues("mathvariant","fontfamily","fontweight","fontstyle");
if (this.style) {
var span = this.HTMLspanElement();
if (span.style.fontFamily) {values.fontfamily = span.style.fontFamily}
if (span.style.fontWeight) {values.fontweight = span.style.fontWeight}
if (span.style.fontStyle) {values.fontStyle = span.style.fontStyle}
}
var variant = values.mathvariant; if (this.variantForm) {variant = "-"+HTMLCSS.fontInUse+"-variant"}
if (values.fontfamily && !this.mathvariant) {
if (!values.fontweight && values.mathvariant.match(/bold/)) {values.fontweight = "bold"}
if (!values.fontstyle && values.mathvariant.match(/italic/)) {values.fontstyle = "italic"}
return {FONTS:[], fonts:[], noRemap:true,
defaultFont: {family:values.fontfamily, style:values.fontstyle, weight:values.fontweight}};
}
if (values.fontweight === "bold") {
variant = {
normal:MML.VARIANT.BOLD, italic:MML.VARIANT.BOLDITALIC,
fraktur:MML.VARIANT.BOLDFRAKTUR, script:MML.VARIANT.BOLDSCRIPT,
"sans-serif":MML.VARIANT.BOLDSANSSERIF,
"sans-serif-italic":MML.VARIANT.SANSSERIFBOLDITALIC
}[variant]||variant;
} else if (values.fontweight === "normal") {
variant = {
bold:MML.VARIANT.normal, "bold-italic":MML.VARIANT.ITALIC,
"bold-fraktur":MML.VARIANT.FRAKTUR, "bold-script":MML.VARIANT.SCRIPT,
"bold-sans-serif":MML.VARIANT.SANSSERIF,
"sans-serif-bold-italic":MML.VARIANT.SANSSERIFITALIC
}[variant]||variant;
}
if (values.fontstyle === "italic") {
variant = {
normal:MML.VARIANT.ITALIC, bold:MML.VARIANT.BOLDITALIC,
"sans-serif":MML.VARIANT.SANSSERIFITALIC,
"bold-sans-serif":MML.VARIANT.SANSSERIFBOLDITALIC
}[variant]||variant;
} else if (values.fontstyle === "normal") {
variant = {
italic:MML.VARIANT.NORMAL, "bold-italic":MML.VARIANT.BOLD,
"sans-serif-italic":MML.VARIANT.SANSSERIF,
"sans-serif-bold-italic":MML.VARIANT.BOLDSANSSERIF
}[variant]||variant;
}
return HTMLCSS.FONTDATA.VARIANT[variant];
}
},{
HTMLautoload: function () {
var file = HTMLCSS.autoloadDir+"/"+this.type+".js";
MathJax.Hub.RestartAfter(AJAX.Require(file));
},
HTMLstretchH: function (box,w) {
this.HTMLremoveColor();
return this.toHTML(box,w);
},
HTMLstretchV: function (box,h,d) {
this.HTMLremoveColor();
return this.toHTML(box,h,d);
}
});
MML.chars.Augment({
toHTML: function (span,variant) {
this.HTMLhandleVariant(span,variant,this.data.join("").replace(/[\u2061-\u2064]/g,"")); // remove invisibles
}
});
MML.entity.Augment({
toHTML: function (span,variant) {
this.HTMLhandleVariant(span,variant,this.toString().replace(/[\u2061-\u2064]/g,"")); // remove invisibles
}
});
MML.mi.Augment({
toHTML: function (span) {
span = this.HTMLhandleSize(this.HTMLcreateSpan(span)); span.bbox = null;
var variant = this.HTMLgetVariant();
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {this.data[i].toHTML(span,variant)}}
if (!span.bbox) {span.bbox = {w:0, h:0, d:0, rw:0, lw:0}}
if (this.data.join("").length !== 1) {delete span.bbox.skew}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
}
});
MML.mn.Augment({
toHTML: function (span) {
span = this.HTMLhandleSize(this.HTMLcreateSpan(span)); span.bbox = null;
var variant = this.HTMLgetVariant();
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {this.data[i].toHTML(span,variant)}}
if (!span.bbox) {span.bbox = {w:0, h:0, d:0, rw:0, lw:0}}
if (this.data.join("").length !== 1) {delete span.bbox.skew}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
}
});
MML.mo.Augment({
toHTML: function (span) {
span = this.HTMLhandleSize(this.HTMLcreateSpan(span));
if (this.data.length == 0) {return span} else {span.bbox = null}
var text = this.data.join("");
var variant = this.HTMLgetVariant();
var values = this.getValues("largeop","displaystyle");
if (values.largeop)
{variant = HTMLCSS.FONTDATA.VARIANT[values.displaystyle ? "-largeOp" : "-smallOp"]}
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {this.data[i].toHTML(span,variant)}}
if (!span.bbox) {span.bbox = {w:0, h:0, d:0, rw:0, lw:0}}
if (text.length !== 1) {delete span.bbox.skew}
if (HTMLCSS.AccentBug && span.bbox.w === 0 && text.length === 1 && span.firstChild) {
// Handle combining characters by adding a non-breaking space and removing that width
span.firstChild.nodeValue += HTMLCSS.NBSP;
HTMLCSS.createSpace(span,0,0,-span.offsetWidth/HTMLCSS.em);
}
if (values.largeop) {
var p = (span.bbox.h - span.bbox.d)/2 - HTMLCSS.TeX.axis_height*span.scale;
if (HTMLCSS.safariVerticalAlignBug && span.lastChild.nodeName === "IMG") {
span.lastChild.style.verticalAlign =
HTMLCSS.Em(parseFloat(span.lastChild.style.verticalAlign||0)/HTMLCSS.em-p/span.scale);
} else if (HTMLCSS.konquerorVerticalAlignBug && span.lastChild.nodeName === "IMG") {
span.style.position = "relative";
span.lastChild.style.position="relative";
span.lastChild.style.top = HTMLCSS.Em(p/span.scale);
} else {
span.style.verticalAlign = HTMLCSS.Em(-p/span.scale);
}
span.bbox.h -= p; span.bbox.d += p;
if (span.bbox.rw > span.bbox.w) {
span.bbox.ic = span.bbox.rw-span.bbox.w;
HTMLCSS.createBlank(span,span.bbox.ic);
span.bbox.w = span.bbox.rw;
}
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLcanStretch: function (direction) {
if (!this.Get("stretchy")) {return false}
var c = this.data.join("");
if (c.length > 1) {return false}
c = HTMLCSS.FONTDATA.DELIMITERS[c.charCodeAt(0)];
return (c && c.dir == direction.substr(0,1));
},
HTMLstretchV: function (box,h,d) {
this.HTMLremoveColor();
var values = this.getValues("symmetric","maxsize","minsize");
var span = this.HTMLspanElement(), H, W = span.bbox.w;
var axis = HTMLCSS.TeX.axis_height, scale = span.scale;
if (values.symmetric) {H = 2*Math.max(h-axis,d+axis)} else {H = h + d}
values.maxsize = HTMLCSS.length2em(values.maxsize,span.bbox.h+span.bbox.d);
values.minsize = HTMLCSS.length2em(values.minsize,span.bbox.h+span.bbox.d);
H = Math.max(values.minsize,Math.min(values.maxsize,H));
span = this.HTMLcreateSpan(box); // clear contents and attributes
HTMLCSS.createDelimiter(span,this.data.join("").charCodeAt(0),H,scale);
if (values.symmetric) {H = (span.bbox.h + span.bbox.d)/2 + axis}
else {H = (span.bbox.h + span.bbox.d) * h/(h + d)}
HTMLCSS.positionDelimiter(span,H);
this.HTMLhandleSpace(span); // add in lspace/rspace, if any
this.HTMLhandleColor(span);
return span;
},
HTMLstretchH: function (box,W) {
this.HTMLremoveColor();
var values = this.getValues("maxsize","minsize","mathvariant","fontweight");
if (values.fontweight === "bold" && !this.mathvariant) {values.mathvariant = MML.VARIANT.BOLD}
var span = this.HTMLspanElement(), scale = span.scale;
values.maxsize = HTMLCSS.length2em(values.maxsize,span.bbox.w);
values.minsize = HTMLCSS.length2em(values.minsize,span.bbox.w);
W = Math.max(values.minsize,Math.min(values.maxsize,W));
span = this.HTMLcreateSpan(box); // clear contents and attributes
HTMLCSS.createDelimiter(span,this.data.join("").charCodeAt(0),W,scale,values.mathvariant);
this.HTMLhandleSpace(span); // add in lspace/rspace, if any
this.HTMLhandleColor(span);
return span;
}
});
MML.mtext.Augment({
toHTML: function (span) {
span = this.HTMLhandleSize(this.HTMLcreateSpan(span)); span.bbox = null;
if (this.Parent().type === "merror") {
// Avoid setting the font style for error text
HTMLCSS.addText(span,this.data.join(""));
var HD = HTMLCSS.getHD(span), W = HTMLCSS.getW(span);
span.bbox = {h: HD.h, d: HD.d, w: W, lw: 0, rw: W};
} else {
var variant = this.HTMLgetVariant();
for (var i = 0, m = this.data.length; i < m; i++)
{if (this.data[i]) {this.data[i].toHTML(span,variant)}}
if (!span.bbox) {span.bbox = {w:0, h:0, d:0, rw:0, lw:0}}
if (this.data.join("").length !== 1) {delete span.bbox.skew}
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
}
});
MML.ms.Augment({toHTML: MML.mbase.HTMLautoload});
MML.mglyph.Augment({toHTML: MML.mbase.HTMLautoload});
MML.mspace.Augment({
toHTML: function (span) {
span = this.HTMLhandleSize(this.HTMLcreateSpan(span));
var values = this.getValues("height","depth","width");
values.mathbackground = this.mathbackground;
if (this.background && !this.mathbackground) {values.mathbackground = this.background}
var h = HTMLCSS.length2em(values.height), d = HTMLCSS.length2em(values.depth),
w = HTMLCSS.length2em(values.width);
HTMLCSS.createSpace(span,h,d,w,values.mathbackground);
return span;
}
});
MML.mphantom.Augment({
toHTML: function (span,HW,D) {
span = this.HTMLcreateSpan(span);
var box = HTMLCSS.Measured(this.data[0].toHTML(span),span);
if (D != null) {HTMLCSS.Remeasured(this.data[0].HTMLstretchV(span,HW,D),span)}
else if (HW != null) {HTMLCSS.Remeasured(this.data[0].HTMLstretchH(span,HW),span)}
span.bbox = {w: box.bbox.w, h: box.bbox.h, d: box.bbox.d, lw: 0, rw: 0};
for (var i = 0, m = span.childNodes.length; i < m; i++)
{span.childNodes[i].style.visibility = "hidden"}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLstretchH: MML.mbase.HTMLstretchH,
HTMLstretchV: MML.mbase.HTMLstretchV
});
MML.mpadded.Augment({
toHTML: function (span,HW,D) {
span = this.HTMLcreateSpan(span);
var stack = HTMLCSS.createStack(span,true);
var box = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[0].toHTML(box),box);
if (D != null) {HTMLCSS.Remeasured(this.data[0].HTMLstretchV(box,HW,D),box)}
else if (HW != null) {HTMLCSS.Remeasured(this.data[0].HTMLstretchH(box,HW),box)}
var values = this.getValues("height","depth","width","lspace","voffset"), x = 0, y = 0, v;
if (values.lspace) {x = this.HTMLlength2em(box,values.lspace)}
if (values.voffset) {y = this.HTMLlength2em(box,values.voffset)}
HTMLCSS.placeBox(box,x,y);
span.bbox = {
h: box.bbox.h, d: box.bbox.d, w: box.bbox.w,
lw: Math.min(0,box.bbox.lw+x), rw: Math.max(box.bbox.w,box.bbox.rw+x),
H: Math.max((box.bbox.H == null ? -HTMLCSS.BIGDIMEN : box.bbox.H),box.bbox.h+y),
D: Math.max((box.bbox.D == null ? -HTMLCSS.BIGDIMEN : box.bbox.D),box.bbox.d-y)
};
if (values.height !== "") {span.bbox.h = this.HTMLlength2em(box,values.height,"h",0)}
if (values.depth !== "") {span.bbox.d = this.HTMLlength2em(box,values.depth,"d",0)}
if (values.width !== "") {span.bbox.w = this.HTMLlength2em(box,values.width,"w",0)}
if (span.bbox.H <= span.bbox.h) {delete span.bbox.H}
if (span.bbox.D <= span.bbox.d) {delete span.bbox.D}
HTMLCSS.setStackWidth(stack,span.bbox.w);
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLlength2em: function (span,length,d,m) {
if (m == null) {m = -HTMLCSS.BIGDIMEN}
var match = String(length).match(/width|height|depth/);
var size = (match ? span.bbox[match[0].charAt(0)] : (d ? span.bbox[d] : null));
var v = HTMLCSS.length2em(length,size);
if (d && String(length).match(/^\s*[-+]/))
{return Math.max(m,span.bbox[d]+v)} else {return v}
},
HTMLstretchH: MML.mbase.HTMLstretchH,
HTMLstretchV: MML.mbase.HTMLstretchV
});
MML.mrow.Augment({
HTMLstretchH: function (box,w) {
this.HTMLremoveColor();
var span = this.HTMLspanElement();
this.data[this.core].HTMLstretchH(span,w);
this.HTMLcomputeBBox(span,true);
this.HTMLhandleColor(span);
return span;
},
HTMLstretchV: function (box,h,d) {
this.HTMLremoveColor();
var span = this.HTMLspanElement();
this.data[this.core].HTMLstretchV(span,h,d);
this.HTMLcomputeBBox(span,true);
this.HTMLhandleColor(span);
return span;
}
});
MML.mstyle.Augment({
toHTML: function (span) {
if (this.data.length) {
span = this.data[0].toHTML(span);
this.spanID = this.data[0].spanID;
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
}
return span;
},
HTMLspanElement: function () {
return (this.data.length ? this.data[0].HTMLspanElement() : null);
},
HTMLstretchH: function (box,w) {
return (this.data.length ? this.data[0].HTMLstretchH(box,w) : box);
},
HTMLstretchV: function (box,h,d) {
return (this.data.length ? this.data[0].HTMLstretchV(box,h,d) : box);
}
});
MML.mfrac.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
var frac = HTMLCSS.createStack(span);
var num = HTMLCSS.createBox(frac), den = HTMLCSS.createBox(frac);
HTMLCSS.Measured(this.data[0].toHTML(num),num);
HTMLCSS.Measured(this.data[1].toHTML(den),den);
var values = this.getValues("displaystyle","linethickness","numalign","denomalign","bevelled");
var scale = this.HTMLgetScale(), isDisplay = values.displaystyle;
var a = HTMLCSS.TeX.axis_height * scale;
if (values.bevelled) {
var delta = (isDisplay ? .4 : .15);
var H = Math.max(num.bbox.h+num.bbox.d,den.bbox.h+den.bbox.d)+2*delta;
var bevel = HTMLCSS.createBox(frac);
HTMLCSS.createDelimiter(bevel,0x2F,H);
HTMLCSS.placeBox(num,0,(num.bbox.d-num.bbox.h)/2+a+delta);
HTMLCSS.placeBox(bevel,num.bbox.w-delta/2,(bevel.bbox.d-bevel.bbox.h)/2+a);
HTMLCSS.placeBox(den,num.bbox.w+bevel.bbox.w-delta,(den.bbox.d-den.bbox.h)/2+a-delta);
} else {
var W = Math.max(num.bbox.w,den.bbox.w);
var t = HTMLCSS.thickness2em(values.linethickness), p,q, u,v;
var mt = HTMLCSS.TeX.min_rule_thickness/this.em;
if (isDisplay) {u = HTMLCSS.TeX.num1; v = HTMLCSS.TeX.denom1}
else {u = (t === 0 ? HTMLCSS.TeX.num3 : HTMLCSS.TeX.num2); v = HTMLCSS.TeX.denom2}
u *= scale; v *= scale;
if (t === 0) {// \atop
p = Math.max((isDisplay ? 7 : 3) * HTMLCSS.TeX.rule_thickness, 2*mt); // force to at least 2 px
q = (u - num.bbox.d) - (den.bbox.h - v);
if (q < p) {u += (p - q)/2; v += (p - q)/2}
} else {// \over
p = Math.max((isDisplay ? 2 : 0) * mt + t, t/2 + 1.5*mt); // force to be at least 1.5px
q = (u - num.bbox.d) - (a + t/2); if (q < p) {u += p - q}
q = (a - t/2) - (den.bbox.h - v); if (q < p) {v += p - q}
var rule = HTMLCSS.createBox(frac);
HTMLCSS.createRule(rule,t,0,W+2*t);
HTMLCSS.placeBox(rule,0,a-t/2);
}
HTMLCSS.alignBox(num,values.numalign,u);
HTMLCSS.alignBox(den,values.denomalign,-v);
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLcanStretch: function (direction) {return false},
HTMLhandleSpace: function (span) {
if (!this.texWithDelims) {
var space = (this.useMMLspacing ? 0 : HTMLCSS.length2em(this.texSpacing()||0)) + .12;
span.style.paddingLeft = HTMLCSS.Em(space);
span.style.paddingRight = ".12em";
}
}
});
MML.msqrt.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
var sqrt = HTMLCSS.createStack(span);
var base = HTMLCSS.createBox(sqrt),
rule = HTMLCSS.createBox(sqrt),
surd = HTMLCSS.createBox(sqrt);
HTMLCSS.Measured(this.data[0].toHTML(base),base);
var scale = this.HTMLgetScale();
var t = HTMLCSS.TeX.rule_thickness * scale, p,q, H, W;
if (this.Get("displaystyle")) {p = HTMLCSS.TeX.x_height * scale} else {p = t}
q = Math.max(t + p/4,2*HTMLCSS.TeX.min_rule_thickness/this.em); // force to be at least 2px
H = base.bbox.h + base.bbox.d + q + t;
W = base.bbox.w;
HTMLCSS.createDelimiter(surd,0x221A,H,scale); HTMLCSS.Measured(surd);
var x = 0;
if (surd.isMultiChar || (HTMLCSS.AdjustSurd && HTMLCSS.imgFonts)) {surd.bbox.w *= .95}
if (surd.bbox.h + surd.bbox.d > H) {q += ((surd.bbox.h+surd.bbox.d) - (H-t))/2}
var ruleC = HTMLCSS.FONTDATA.DELIMITERS[HTMLCSS.FONTDATA.RULECHAR];
if (!ruleC || W < ruleC.HW[0][0]*scale || scale < .75) {
HTMLCSS.createRule(rule,t,0,W);
} else {
HTMLCSS.createDelimiter(rule,HTMLCSS.FONTDATA.RULECHAR,W,scale);
}
H = base.bbox.h + q + t;
x = this.HTMLaddRoot(sqrt,surd,x,surd.bbox.h+surd.bbox.d-H,scale);
HTMLCSS.placeBox(surd,x,H-surd.bbox.h);
HTMLCSS.placeBox(rule,x+surd.bbox.w,H-rule.bbox.h+HTMLCSS.rfuzz);
HTMLCSS.placeBox(base,x+surd.bbox.w,0);
span.bbox.h += t;
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLaddRoot: function (sqrt,surd,x,d,scale) {return x}
});
MML.mroot.Augment({
toHTML: MML.msqrt.prototype.toHTML,
HTMLaddRoot: function (sqrt,surd,x,d,scale) {
var box = HTMLCSS.createBox(sqrt);
var root = this.data[1].toHTML(box);
root.style.paddingRight = root.style.paddingLeft = ""; // remove extra padding, if any
HTMLCSS.Measured(root,box);
var h = this.HTMLrootHeight(surd.bbox.h+surd.bbox.d,scale,box)-d;
var w = Math.min(box.bbox.w,box.bbox.rw); // remove extra right-hand padding, if any
x = Math.max(w,surd.offset);
HTMLCSS.placeBox(box,x-w,h);
return x - surd.offset;
},
HTMLrootHeight: function (d,scale,root) {
return .45*(d-.9*scale)+.6*scale + Math.max(0,root.bbox.d-.075);
}
});
MML.mfenced.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
if (this.data.open) {this.data.open.toHTML(span)}
if (this.data[0]) {this.data[0].toHTML(span)}
for (var i = 1, m = this.data.length; i < m; i++) {
if (this.data[i]) {
if (this.data["sep"+i]) {this.data["sep"+i].toHTML(span)}
this.data[i].toHTML(span);
}
}
if (this.data.close) {this.data.close.toHTML(span)}
var stretchy = this.HTMLcomputeBBox(span);
var h = span.bbox.h, d = span.bbox.d;
for (i = 0, m = stretchy.length; i < m; i++) {stretchy[i].HTMLstretchV(span,h,d)}
if (stretchy.length) {this.HTMLcomputeBBox(span,true)}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLcomputeBBox: function (span,full) {
var i, m, child, bbox, BBOX, hasDimens = 0, width, stretchy = [];
BBOX = span.bbox = {};
this.HTMLcheckStretchy(this.data.open,BBOX,stretchy,full);
this.HTMLcheckStretchy(this.data[0],BBOX,stretchy,full);
for (i = 1, m = this.data.length; i < m; i++) {
if (this.data[i]) {
this.HTMLcheckStretchy(this.data["sep"+i],BBOX,stretchy,full);
this.HTMLcheckStretchy(this.data[i],BBOX,stretchy,full);
}
}
this.HTMLcheckStretchy(this.data.close,BBOX,stretchy,full);
this.HTMLcleanBBox(BBOX);
return stretchy;
},
HTMLcheckStretchy: function (core,BBOX,stretchy,full) {
if (core) {
if (!full && core.HTMLcanStretch("Vertical"))
{stretchy.push(core); core = (core.CoreMO()||core)}
this.HTMLcombineBBoxes(core,BBOX);
}
}
});
MML.menclose.Augment({toHTML: MML.mbase.HTMLautoload});
MML.semantics.Augment({
toHTML: function (span) {
if (this.data.length) {
span = this.data[0].toHTML(span);
this.spanID = this.data[0].spanID;
this.HTMLhandleSpace(span);
}
return span;
},
HTMLspanElement: function () {
return (this.data.length ? this.data[0].HTMLspanElement() : null);
},
HTMLstretchH: function (box,w) {
return (this.data.length ? this.data[0].HTMLstretchH(box,w) : box);
},
HTMLstretchV: function (box,h,d) {
return (this.data.length ? this.data[0].HTMLstretchV(box,h,d) : box);
}
});
MML.munderover.Augment({
toHTML: function (span,HW,D) {
var values = this.getValues("displaystyle","accent","accentunder","align");
if (!values.displaystyle && this.data[this.base].Get("movablelimits"))
{return MML.msubsup.prototype.toHTML.call(this,span)}
span = this.HTMLcreateSpan(span); var scale = this.HTMLgetScale();
var stack = HTMLCSS.createStack(span);
var boxes = [], stretch = [], box, i, m, W = -HTMLCSS.BIGDIMEN, WW = W;
for (i = 0, m = this.data.length; i < m; i++) {
if (this.data[i]) {
box = boxes[i] = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[i].toHTML(box),box);
if (i == this.base) {
if (D != null) {HTMLCSS.Remeasured(this.data[this.base].HTMLstretchV(box,HW,D),box)}
else if (HW != null) {HTMLCSS.Remeasured(this.data[this.base].HTMLstretchH(box,HW),box)}
stretch[i] = (D == null && HW != null ? false :
this.data[i].HTMLcanStretch("Horizontal"));
} else {
stretch[i] = this.data[i].HTMLcanStretch("Horizontal");
}
if (box.bbox.w > WW) {WW = box.bbox.w}
if (!stretch[i] && WW > W) {W = WW}
}
}
if (W == -HTMLCSS.BIGDIMEN) {W = WW}
if (D == null && HW != null) {W = WW = HW}
var t = HTMLCSS.TeX.rule_thickness, factor = HTMLCSS.FONTDATA.TeX_factor;
var base = boxes[this.base], delta = (base.bbox.ic || 0);
var x, y, z1, z2, z3, dw, k;
for (i = 0, m = this.data.length; i < m; i++) {
if (this.data[i]) {
box = boxes[i];
if (stretch[i]) {box.bbox = this.data[i].HTMLstretchH(box,W).bbox}
z3 = HTMLCSS.TeX.big_op_spacing5 * scale;
var accent = (i != this.base && values[this.ACCENTS[i]]);
if (accent && box.bbox.w <= 1/HTMLCSS.em+.0001) { // images can get the width off by 1px
box.bbox.w = box.bbox.rw - box.bbox.lw; box.bbox.noclip = true;
if (box.bbox.lw)
{box.insertBefore(HTMLCSS.createSpace(box.parentNode,0,0,-box.bbox.lw),box.firstChild)}
HTMLCSS.createBlank(box,0,0,box.bbox.rw+.1);
}
dw = {left:0, center:(W-box.bbox.w)/2, right:W-box.bbox.w}[values.align];
x = dw; y = 0;
if (i == this.over) {
if (accent) {
k = Math.max(t * scale * factor,2.5/this.em); z3 = 0;
if (base.bbox.skew) {x += base.bbox.skew}
} else {
z1 = HTMLCSS.TeX.big_op_spacing1 * scale * factor;
z2 = HTMLCSS.TeX.big_op_spacing3 * scale * factor;
k = Math.max(z1,z2-Math.max(0,box.bbox.d));
}
k = Math.max(k,1.5/this.em); // force to be at least 1.5px
x += delta; y = base.bbox.h + box.bbox.d + k;
box.bbox.h += z3;
} else if (i == this.under) {
if (accent) {
k = 3*t * scale * factor; z3 = 0;
} else {
z1 = HTMLCSS.TeX.big_op_spacing2 * scale * factor;
z2 = HTMLCSS.TeX.big_op_spacing4 * scale * factor;
k = Math.max(z1,z2-box.bbox.h);
}
k = Math.max(k,1.5/this.em); // force to be at least 1.5px
x -= delta; y = -(base.bbox.d + box.bbox.h + k);
box.bbox.d += z3;
}
HTMLCSS.placeBox(box,x,y);
}
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLstretchH: MML.mbase.HTMLstretchH,
HTMLstretchV: MML.mbase.HTMLstretchV
});
MML.msubsup.Augment({
toHTML: function (span,HW,D) {
span = this.HTMLcreateSpan(span); var scale = this.HTMLgetScale();
var stack = HTMLCSS.createStack(span), script, box, values;
var base = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[this.base].toHTML(base),base);
if (D != null) {HTMLCSS.Remeasured(this.data[this.base].HTMLstretchV(base,HW,D),base)}
else if (HW != null) {HTMLCSS.Remeasured(this.data[this.base].HTMLstretchH(base,HW),base)}
HTMLCSS.placeBox(base,0,0);
var sscale = (this.data[this.sup] || this.data[this.sub]).HTMLgetScale();
var x_height = HTMLCSS.TeX.x_height * scale,
s = HTMLCSS.TeX.scriptspace * scale * .75; // FIXME: .75 can be removed when IC is right?
var sup, sub;
if (this.data[this.sup]) {
sup = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[this.sup].toHTML(sup),sup);
sup.bbox.w += s; sup.bbox.rw = Math.max(sup.bbox.w,sup.bbox.rw);
}
if (this.data[this.sub]) {
sub = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[this.sub].toHTML(sub),sub);
sub.bbox.w += s; sub.bbox.rw = Math.max(sub.bbox.w,sub.bbox.rw);
}
var q = HTMLCSS.TeX.sup_drop * sscale, r = HTMLCSS.TeX.sub_drop * sscale;
var u = base.bbox.h - q, v = base.bbox.d + r, delta = 0, p;
if (base.bbox.ic) {delta = base.bbox.ic}
if (this.data[this.base].type === "mi" || this.data[this.base].type === "mo") {
if (this.data[this.base].data.join("").length === 1 && base.bbox.scale === 1 &&
!this.data[this.base].Get("largeop")) {u = v = 0}
}
var min = this.getValues("subscriptshift","superscriptshift");
min.subscriptshift = (min.subscriptshift === "" ? 0 : HTMLCSS.length2em(min.subscriptshift));
min.superscriptshift = (min.superscriptshift === "" ? 0 : HTMLCSS.length2em(min.superscriptshift));
if (!sup) {
v = Math.max(v,HTMLCSS.TeX.sub1*scale,sub.bbox.h-(4/5)*x_height,min.subscriptshift);
HTMLCSS.placeBox(sub,base.bbox.w+s-delta,-v,sub.bbox);
} else {
if (!sub) {
var values = this.getValues("displaystyle","texprimestyle");
p = HTMLCSS.TeX[(values.displaystyle ? "sup1" : (values.texprimestyle ? "sup3" : "sup2"))];
u = Math.max(u,p*scale,sup.bbox.d+(1/4)*x_height,min.superscriptshift);
HTMLCSS.placeBox(sup,base.bbox.w+s,u,sup.bbox);
} else {
v = Math.max(v,HTMLCSS.TeX.sub2*scale);
var t = HTMLCSS.TeX.rule_thickness * scale;
if ((u - sup.bbox.d) - (sub.bbox.h - v) < 3*t) {
v = 3*t - u + sup.bbox.d + sub.bbox.h;
q = (4/5)*x_height - (u - sup.bbox.d) + .05*scale*0;
if (q > 0) {u += q; v -= q}
}
HTMLCSS.placeBox(sup,base.bbox.w+s,Math.max(u,min.superscriptshift));
HTMLCSS.placeBox(sub,base.bbox.w+s-delta,-Math.max(v,min.subscriptshift));
}
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLstretchH: MML.mbase.HTMLstretchH,
HTMLstretchV: MML.mbase.HTMLstretchV
});
MML.mtable.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
if (this.data.length === 0) {return span}
var values = this.getValues("columnalign","columnspacing","rowspacing",
"align","useHeight","width","side","minlabelspacing");
var WIDTH = (values.width === "auto" ? null : values.width);
var COLWIDTH = (WIDTH ? "100%" : null);
var stack = HTMLCSS.createStack(span,false,WIDTH);
var scale = this.HTMLgetScale(); var LABEL = -1;
//
// Create cells and measure columns and rows
//
var H = [], D = [], W = [], A = [], i, j, J = 0, m, M, s, row, C = [];
var LHD = HTMLCSS.FONTDATA.baselineskip * scale * values.useHeight,
LH = HTMLCSS.FONTDATA.lineH * scale, LD = HTMLCSS.FONTDATA.lineD * scale;
for (i = 0, m = this.data.length; i < m; i++) {
row = this.data[i]; s = (row.type === "mlabeledtr" ? LABEL : 0);
A[i] = []; H[i] = 0; D[i] = 0;
for (j = s, M = row.data.length + s; j < M; j++) {
if (W[j] == null) {
W[j] = -HTMLCSS.BIGDIMEN; if (j > J) {J =j}
// FIXME: these widths should come from columnwidths attribute
C[j] = HTMLCSS.createStack(HTMLCSS.createBox(stack,COLWIDTH),false,COLWIDTH);
}
A[i][j] = HTMLCSS.createBox(C[j]);
HTMLCSS.Measured(row.data[j-s].toHTML(A[i][j]),A[i][j]);
if (A[i][j].bbox.h > H[i]) {H[i] = A[i][j].bbox.h}
if (A[i][j].bbox.d > D[i]) {D[i] = A[i][j].bbox.d}
if (A[i][j].bbox.w > W[j]) {W[j] = A[i][j].bbox.w}
}
}
H[0] = Math.max(H[0],LH); D[A.length-1] = Math.max(D[A.length-1],LD);
//
// Determine spacing and alignment
//
var CSPACE = values.columnspacing.split(/ /),
RSPACE = values.rowspacing.split(/ /),
CALIGN = values.columnalign.split(/ /);
for (i = 0, m = CSPACE.length; i < m; i++) {CSPACE[i] = HTMLCSS.length2em(CSPACE[i])}
for (i = 0, m = RSPACE.length; i < m; i++) {RSPACE[i] = HTMLCSS.length2em(RSPACE[i])}
while (CSPACE.length <= J) {CSPACE.push(CSPACE[CSPACE.length-1])}
while (CALIGN.length <= J) {CALIGN.push(CALIGN[CALIGN.length-1])}
while (RSPACE.length <= A.length) {RSPACE.push(RSPACE[RSPACE.length-1])}
if (C[LABEL]) {
CALIGN[LABEL] = (values.side.substr(0,1) === "l" ? "left" : "right");
CSPACE[LABEL] = -W[LABEL];
}
//
// Determine array total height
//
var HD = H[0] + D[A.length-1];
for (i = 0, m = A.length-1; i < m; i++) {HD += Math.max(LHD,D[i]+H[i+1]+RSPACE[i])}
//
// Compute alignment
//
var Y = HD/2 + HTMLCSS.TeX.axis_height*scale - H[0];
//
// Lay out array by columns
//
var x = 0, y = Y; s = (C[LABEL] ? LABEL : 0);
for (j = s; j <= J; j++) {
for (i = 0, m = A.length; i < m; i++) {
s = (this.data[i].type === "mlabeledtr" ? LABEL : 0);
if (A[i][j])
{HTMLCSS.alignBox(A[i][j],(this.data[i].data[j-s].columnalign||CALIGN[j]),y)}
if (i < A.length-1) {y -= Math.max(LHD,D[i]+H[i+1]+ RSPACE[i])}
}
HTMLCSS.placeBox(C[j].parentNode,x,0);
x += W[j] + CSPACE[j]; y = Y;
}
//
// Place the labels, if any
//
if (C[LABEL]) {
var eqn = HTMLCSS.createStack(span,false,"100%");
var align = HTMLCSS.config.styles[".MathJax_Display"]["text-align"];
HTMLCSS.addBox(eqn,stack); HTMLCSS.alignBox(stack,align,0);
HTMLCSS.addBox(eqn,C[LABEL]); HTMLCSS.alignBox(C[LABEL],CALIGN[LABEL],0);
C[LABEL].style.marginRight = C[LABEL].style.marginLeft =
HTMLCSS.Em(HTMLCSS.length2em(values.minlabelspacing));
}
//
// Finish the table
//
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
},
HTMLhandleSpace: function (span) {
span.style.paddingLeft = span.style.paddingRight = ".1667em";
}
});
MML.math.Augment({
toHTML: function (span,node) {
var alttext = this.Get("alttext"); if (alttext) {node.setAttribute("aria-label",alttext)}
var nobr = HTMLCSS.addElement(span,"nobr",{style:{visibility:"hidden"}});
span = this.HTMLcreateSpan(nobr);
var stack = HTMLCSS.createStack(span);
var box = HTMLCSS.createBox(stack);
if (HTMLCSS.msieColorBug) {
this.data[0].background = this.background;
this.data[0].mathbackground = this.mathbackground;
delete this.background; delete this.mathbackground;
}
var math = HTMLCSS.Measured(this.data[0].toHTML(box),box);
HTMLCSS.placeBox(box,0,0);
if (math.bbox.width != null) {
stack.style.width = math.bbox.width;
box.style.width = "100%";
}
this.HTMLhandleColor(span);
HTMLCSS.createRule(span,math.bbox.h,math.bbox.d,0);
nobr.style.visibility = "";
return span;
}
});
MML.TeXAtom.Augment({
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
if (this.texClass === MML.TEXCLASS.VCENTER) {
var stack = HTMLCSS.createStack(span);
var box = HTMLCSS.createBox(stack);
HTMLCSS.Measured(this.data[0].toHTML(box),box);
// FIXME: should the axis height be scaled?
HTMLCSS.placeBox(box,0,HTMLCSS.TeX.axis_height-(box.bbox.h+box.bbox.d)/2+box.bbox.d);
} else {
span.bbox = this.data[0].toHTML(span).bbox;
}
this.HTMLhandleSpace(span);
this.HTMLhandleColor(span);
return span;
}
});
//
// Handle browser-specific setup
//
MathJax.Hub.Browser.Select({
MSIE: function (browser) {
var isIE7 = browser.versionAtLeast("7.0");
var isIE8 = browser.versionAtLeast("8.0") && document.documentMode > 7;
var quirks = (document.compatMode === "BackCompat");
// MSIE can't measure widths properly without this
HTMLCSS.config.styles[".MathJax span"] = {position: "relative"};
// FIXME: work out tests for these?
HTMLCSS.Augment({
getMarginScale: HTMLCSS.getMSIEmarginScale,
PaddingWidthBug: true,
msieAccentBug: true,
msieColorBug: true,
msieMarginWidthBug: true,
msiePaddingWidthBug: true,
msieCharPaddingWidthBug: (isIE8 && !quirks),
msieBorderWidthBug: quirks,
msieInlineBlockAlignBug: (!isIE8 || quirks),
msieVerticalAlignBug: (isIE8 && !quirks),
msiePlaceBoxBug: (isIE8 && !quirks),
msieClipRectBug: !isIE8,
msieNegativeSpaceBug: quirks,
negativeSkipBug: true,
msieIE6: !isIE7,
msieItalicWidthBug: true,
FontFaceBug: true,
allowWebFonts: "eot"
});
},
Firefox: function (browser) {
var webFonts = false;
if (browser.versionAtLeast("3.5")) {
var root = String(document.location).replace(/[^\/]*$/,"");
if (document.location.protocol !== "file:" ||
(MathJax.Hub.config.root+"/").substr(0,root.length) === root) {webFonts = "otf"}
}
HTMLCSS.Augment({
ffVerticalAlignBug: true,
AccentBug: true,
allowWebFonts: webFonts
});
},
Safari: function (browser) {
var v3p0 = browser.versionAtLeast("3.0");
var v3p1 = browser.versionAtLeast("3.1");
browser.isMobile = (navigator.appVersion.match(/Mobile/i) != null);
HTMLCSS.Augment({
rfuzz: .05,
AccentBug: true,
AdjustSurd: true,
safariNegativeSpaceBug: true,
safariVerticalAlignBug: !v3p1,
safariTextNodeBug: !v3p0,
safariWebFontSerif: ["serif"],
allowWebFonts: (v3p1 && !browser.isMobile ? (browser.isPC ? "svg" : "otf") : false)
});
},
Chrome: function (browser) {
HTMLCSS.Augment({
rfuzz: .05,
AccentBug: true,
AdjustSurd: true,
allowWebFonts: "svg",
safariNegativeSpaceBug: true,
safariWebFontSerif: [""]
});
},
Opera: function (browser) {
HTMLCSS.config.styles[".MathJax .merror"]["vertical-align"] = null;
HTMLCSS.Augment({
operaHeightBug: true,
operaVerticalAlignBug: true,
negativeSkipBug: true,
FontFaceBug: true,
PaddingWidthBug: true,
allowWebFonts: (browser.versionAtLeast("10.0") ? "otf" : false)
});
},
Konqueror: function (browser) {
HTMLCSS.Augment({
konquerorVerticalAlignBug: true
});
}
});
HTMLCSS.loadComplete("jax.js");
})(MathJax.ElementJax.mml, MathJax.Ajax, MathJax.OutputJax["HTML-CSS"]);
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