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Code Issues 8 Pull Requests 3 Actions Packages Projects Releases Wiki Activity

Add ability to calculate heights/depths

Browse Source 
Summary:
This diff does a couple different things:

 - There is now a metrics/ folder, which contains the property files describing
   the metrics if the fonts, as well as a script for reading and printing the
   metrics in javascript.
 - Fractions and superscripts/subscripts are now rendered in slightly different
   ways now (notably, no use of inline-table). This allows for much more precise
   positioning of the superscripts, subscripts, numerators, and denominators,
   while still having an appropriate baseline. Also, there is no longer a
   sup/sub/supsub distinction, there are only supsubs with null sup/sub.
 - Using the new font metrics and by implementing the formulas found in The TeX
   Book, Appendix G, the heights and depths of all of the sub-expressions in a
   formula are now calculated. These are currently used to:
    - Correctly position superscripts, subscripts, numerators, and denominators
    - Adjust the height and depth of the overall expression so it takes up the
      appropriate space
 - Because we have to add attributes (height and depth) to every attribute, I
   have changed the way DOM nodes are assembled. Now, instead of assembling the
   DOM elements inline (which is a problem because we need to track
   height/depth, and we shouldn't (and can't in IE 8) attach raw attributes to DOM
   nodes), we assemble a pseudo-DOM structure with the extra information, and
   then actually assemble it at the very end.

The main page also now has an updated expression to show off and test the new
and improved parsing.

Test Plan:
View the main page, make sure that the expression renders. Make sure
that the tests pass. Make sure that expressions have the correct calculated
height (this is most easily tested by viewing them on the main page and making
sure that the top of the expression lines up with the bottom of the input box).

Reviewers: alpert

Reviewed By: alpert

Differential Revision: http://phabricator.khanacademy.org/D3442
This commit is contained in:
Emily Eisenberg 2013-08-13 18:16:43 -07:00
parent c583d23a7c
commit 0a3a2271f4
21 changed files with 5626 additions and 366 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Makefile
View File

@ -1,5 +1,5 @@
.PHONY: build setup copy serve clean
build: setup build/katex.js
build: setup build/katex.js build/katex.less.css
setup:
npm install
@ -14,6 +14,9 @@ build/katex.js: katex.js $(wildcard *.js)
build/katex.min.js: build/katex.js
uglifyjs --mangle < $< > $@
build/katex.less.css: static/katex.less
./node_modules/.bin/lessc $< > $@
serve:
node server.js

23
Options.js Normal file
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@ -0,0 +1,23 @@
function Options(style, color, parentStyle) {
this.style = style;
this.color = color;
if (!parentStyle) {
parentStyle = style;
}
this.parentStyle = parentStyle;
}
Options.prototype.withStyle = function(style) {
return new Options(style, this.color, this.style);
};
Options.prototype.withColor = function(color) {
return new Options(this.style, color, this.style);
};
Options.prototype.reset = function() {
return new Options(this.style, this.color, this.style);
};
module.exports = Options;

10
Parser.js
View File

@ -147,19 +147,11 @@ Parser.prototype.parseAtom = function(pos) {
break;
}
if (sup && sub) {
if (sup || sub) {
return new ParseResult(
new ParseNode("supsub", {base: nucleusNode, sup: sup,
sub: sub}),
nextPos);
} else if (sup) {
return new ParseResult(
new ParseNode("sup", {base: nucleusNode, sup: sup}),
nextPos);
} else if (sub) {
return new ParseResult(
new ParseNode("sub", {base: nucleusNode, sub: sub}),
nextPos);
} else {
return nucleus;
}

35
Style.js
View File

@ -1,7 +1,8 @@
function Style(id, size, cramped) {
function Style(id, size, multiplier, cramped) {
this.id = id;
this.size = size;
this.cramped = cramped;
this.sizeMultiplier = multiplier;
}
Style.prototype.sup = function() {
@ -20,13 +21,16 @@ Style.prototype.fracDen = function() {
return styles[fracDen[this.id]];
};
/**
* HTML class name, like "display cramped"
*/
// HTML class name, like "displaystyle cramped"
Style.prototype.cls = function() {
return sizeNames[this.size] + (this.cramped ? " cramped" : " uncramped");
};
// HTML Reset class name, like "reset-textstyle"
Style.prototype.reset = function() {
return resetNames[this.size];
};
var D = 0;
var Dc = 1;
var T = 2;
@ -43,15 +47,22 @@ var sizeNames = [
"scriptscriptstyle"
];
var resetNames = [
"reset-textstyle",
"reset-textstyle",
"reset-scriptstyle",
"reset-scriptscriptstyle",
];
var styles = [
new Style(D, 0, false),
new Style(Dc, 0, true),
new Style(T, 1, false),
new Style(Tc, 1, true),
new Style(S, 2, false),
new Style(Sc, 2, true),
new Style(SS, 3, false),
new Style(SSc, 3, true)
new Style(D, 0, 1.0, false),
new Style(Dc, 0, 1.0, true),
new Style(T, 1, 1.0, false),
new Style(Tc, 1, 1.0, true),
new Style(S, 2, 0.66667, false),
new Style(Sc, 2, 0.66667, true),
new Style(SS, 3, 0.5, false),
new Style(SSc, 3, 0.5, true)
];
var sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];

376
buildTree.js
View File

@ -1,23 +1,12 @@
var Options = require("./Options");
var ParseError = require("./ParseError");
var Style = require("./Style");
var domTree = require("./domTree");
var fontMetrics = require("./fontMetrics");
var parseTree = require("./parseTree");
var utils = require("./utils");
var ParseError = require("./ParseError");
function Options(style, color) {
this.style = style;
this.color = color;
}
Options.prototype.withStyle = function(style) {
return new Options(style, this.color);
}
Options.prototype.withColor = function(color) {
return new Options(this.style, color);
}
var buildExpression = function(expression, options, prev) {
var groups = [];
for (var i = 0; i < expression.length; i++) {
@ -28,26 +17,58 @@ var buildExpression = function(expression, options, prev) {
return groups;
};
var makeSpan = function(className, children) {
var span = document.createElement("span");
span.className = className || "";
var makeSpan = function(classes, children) {
var height = 0;
var depth = 0;
if (children) {
for (var i = 0; i < children.length; i++) {
span.appendChild(children[i]);
if (children[i].height > height) {
height = children[i].height;
}
if (children[i].depth > depth) {
depth = children[i].depth;
}
}
}
return span;
return new domTree.span(classes, children, height, depth);
};
var groupToType = {
mathord: "mord",
textord: "mord",
bin: "mbin",
rel: "mrel",
open: "mopen",
close: "mclose",
frac: "minner",
spacing: "mord",
punct: "mpunct",
ordgroup: "mord",
namedfn: "mop",
katex: "mord",
};
var getTypeOfGroup = function(group) {
if (group.type === "supsub") {
return getTypeOfGroup(group.value.base);
} else if (group.type === "llap" || group.type === "rlap") {
return getTypeOfGroup(group.value);
} else if (group.type === "color") {
return getTypeOfGroup(group.value.value);
} else {
return groupToType[group.type];
}
};
var groupTypes = {
mathord: function(group, options, prev) {
return makeSpan("mord" + options.color, [mathit(group.value)]);
return makeSpan(["mord", options.color], [mathit(group.value)]);
},
textord: function(group, options, prev) {
return makeSpan("mord" + options.color, [textit(group.value)]);
return makeSpan(["mord", options.color], [mathrm(group.value)]);
},
bin: function(group, options, prev) {
@ -62,66 +83,106 @@ var groupTypes = {
group.type = "ord";
className = "mord";
}
return makeSpan(className + options.color, [textit(group.value)]);
return makeSpan([className, options.color], [mathrm(group.value)]);
},
rel: function(group, options, prev) {
return makeSpan("mrel" + options.color, [textit(group.value)]);
},
sup: function(group, options, prev) {
var sup = makeSpan("msup " + options.style.cls(), [
makeSpan(options.style.sup().cls(), [
buildGroup(group.value.sup,
options.withStyle(options.style.sup()))
])
]);
return makeSpan("mord", [
buildGroup(group.value.base, options), sup
]);
},
sub: function(group, options, prev) {
var sub = makeSpan("msub " + options.style.cls(), [
makeSpan(options.style.sub().cls(), [
buildGroup(group.value.sub,
options.withStyle(options.style.sub()))
])
]);
return makeSpan("mord", [
buildGroup(group.value.base, options), sub
]);
return makeSpan(["mrel", options.color], [mathrm(group.value)]);
},
supsub: function(group, options, prev) {
var sup = makeSpan("msup " + options.style.sup().cls(), [
buildGroup(group.value.sup, options.withStyle(options.style.sup()))
]);
var sub = makeSpan("msub " + options.style.sub().cls(), [
buildGroup(group.value.sub, options.withStyle(options.style.sub()))
]);
var base = buildGroup(group.value.base, options.reset());
var supsub = makeSpan("msupsub " + options.style.cls(), [sup, sub]);
if (group.value.sup) {
var sup = buildGroup(group.value.sup,
options.withStyle(options.style.sup()));
var supmid = makeSpan(
[options.style.reset(), options.style.sup().cls()], [sup]);
var supwrap = makeSpan(["msup", options.style.reset()], [supmid]);
}
return makeSpan("mord", [
buildGroup(group.value.base, options), supsub
]);
if (group.value.sub) {
var sub = buildGroup(group.value.sub,
options.withStyle(options.style.sub()));
var submid = makeSpan(
[options.style.reset(), options.style.sub().cls()], [sub]);
var subwrap = makeSpan(["msub"], [submid]);
}
var u = base.height - fontMetrics.metrics.supDrop;
var v = base.depth + fontMetrics.metrics.subDrop;
var p;
if (options.style === Style.DISPLAY) {
p = fontMetrics.metrics.sup1;
} else if (options.style.cramped) {
p = fontMetrics.metrics.sup3;
} else {
p = fontMetrics.metrics.sup2;
}
var supsub;
if (!group.value.sup) {
v = Math.max(v, fontMetrics.metrics.sub1,
sub.height - 0.8 * fontMetrics.metrics.xHeight);
subwrap.style.top = v + "em";
subwrap.depth = subwrap.depth + v;
subwrap.height = 0;
supsub = makeSpan(["msupsub"], [subwrap]);
} else if (!group.value.sub) {
u = Math.max(u, p,
sup.depth + 0.25 * fontMetrics.metrics.xHeight);
supwrap.style.top = -u + "em";
supwrap.height = supwrap.height + u;
supwrap.depth = 0;
supsub = makeSpan(["msupsub"], [supwrap]);
} else {
u = Math.max(u, p,
sup.depth + 0.25 * fontMetrics.metrics.xHeight);
v = Math.max(v, fontMetrics.metrics.sub2);
var theta = fontMetrics.metrics.defaultRuleThickness;
if ((u - sup.depth) - (sub.height - v) < 4 * theta) {
v = 4 * theta - (u - sup.depth) + sub.height;
var psi = 0.8 * fontMetrics.metrics.xHeight - (u - sup.depth);
if (psi > 0) {
u += psi;
v -= psi;
}
}
supwrap.style.top = -u + "em";
subwrap.style.top = v + "em";
supwrap.height = supwrap.height + u;
supwrap.depth = 0;
subwrap.height = 0;
subwrap.depth = subwrap.depth + v;
supsub = makeSpan(["msupsub"], [supwrap, subwrap]);
}
return makeSpan([getTypeOfGroup(group.value.base)], [base, supsub]);
},
open: function(group, options, prev) {
return makeSpan("mopen" + options.color, [textit(group.value)]);
return makeSpan(["mopen", options.color], [mathrm(group.value)]);
},
close: function(group, options, prev) {
return makeSpan("mclose" + options.color, [textit(group.value)]);
return makeSpan(["mclose", options.color], [mathrm(group.value)]);
},
frac: function(group, options, prev) {
if (utils.isBuggyWebKit) {
throw new ParseError(
"KaTeX fractions don't work in WebKit <= 537.1");
}
var fstyle = options.style;
if (group.value.size === "dfrac") {
fstyle = Style.DISPLAY;
@ -132,39 +193,86 @@ var groupTypes = {
var nstyle = fstyle.fracNum();
var dstyle = fstyle.fracDen();
var numer = makeSpan("mfracnum " + nstyle.cls(), [
makeSpan("", [
buildGroup(group.value.numer, options.withStyle(nstyle))
])
]);
var mid = makeSpan("mfracmid");
var denom = makeSpan("mfracden " + dstyle.cls(), [
makeSpan("", [
buildGroup(group.value.denom, options.withStyle(dstyle))
])
]);
var numer = buildGroup(group.value.numer, options.withStyle(nstyle));
var numernumer = makeSpan([fstyle.reset(), nstyle.cls()], [numer]);
var numerrow = makeSpan(["mfracnum"], [numernumer]);
return makeSpan("minner mfrac " + fstyle.cls() + options.color, [
numer, mid, denom
var mid = makeSpan(["mfracmid"], [makeSpan()]);
var denom = buildGroup(group.value.denom, options.withStyle(dstyle));
var denomdenom = makeSpan([fstyle.reset(), dstyle.cls()], [denom])
var denomrow = makeSpan(["mfracden"], [denomdenom]);
var theta = fontMetrics.metrics.defaultRuleThickness;
var u, v, phi;
if (fstyle.size === Style.DISPLAY.size) {
u = fontMetrics.metrics.num1;
v = fontMetrics.metrics.denom1;
phi = 3 * theta;
} else {
u = fontMetrics.metrics.num2;
v = fontMetrics.metrics.denom2;
phi = theta;
}
var a = fontMetrics.metrics.axisHeight;
if ((u - numer.depth) - (a + 0.5 * theta) < phi) {
u += phi - ((u - numer.depth) - (a + 0.5 * theta));
}
if ((a - 0.5 * theta) - (denom.height - v) < phi) {
v += phi - ((a - 0.5 * theta) - (denom.height - v));
}
numerrow.style.top = -u + "em";
mid.style.top = -(a - 0.5 * theta) + "em";
denomrow.style.top = v + "em";
numerrow.height = numerrow.height + u;
numerrow.depth = 0;
denomrow.height = 0;
denomrow.depth = denomrow.depth + v;
var frac = makeSpan([], [numerrow, mid, denomrow]);
frac.height *= fstyle.sizeMultiplier / options.style.sizeMultiplier;
frac.depth *= fstyle.sizeMultiplier / options.style.sizeMultiplier;
var wrap = makeSpan([options.style.reset(), fstyle.cls()], [frac]);
return makeSpan(["minner", options.color], [
makeSpan(["mfrac"], [wrap])
]);
},
color: function(group, options, prev) {
var frag = document.createDocumentFragment();
var els = buildExpression(
group.value.value,
options.withColor(" " + group.value.color),
options.withColor(group.value.color),
prev
);
var height = 0;
var depth = 0;
for (var i = 0; i < els.length; i++) {
frag.appendChild(els[i]);
if (els[i].height > height) {
var height = els[i].height;
}
if (els[i].depth > depth) {
var depth = els[i].depth;
}
}
return frag;
return new domTree.documentFragment(els, height, depth);
},
spacing: function(group, options, prev) {
if (group.value === "\\ " || group.value === "\\space") {
return makeSpan("mord mspace", [textit(group.value)]);
return makeSpan(["mord", "mspace"], [mathrm(group.value)]);
} else {
var spacingClassMap = {
"\\qquad": "qquad",
@ -174,42 +282,55 @@ var groupTypes = {
"\\,": "thinspace"
};
return makeSpan("mord mspace " + spacingClassMap[group.value]);
return makeSpan(["mord", "mspace", spacingClassMap[group.value]]);
}
},
llap: function(group, options, prev) {
var inner = makeSpan("", [buildGroup(group.value, options)]);
return makeSpan("llap " + options.style.cls(), [inner]);
var inner = makeSpan([], [buildGroup(group.value, options.reset())]);
return makeSpan(["llap", options.style.cls()], [inner]);
},
rlap: function(group, options, prev) {
var inner = makeSpan("", [buildGroup(group.value, options)]);
return makeSpan("rlap " + options.style.cls(), [inner]);
var inner = makeSpan([], [buildGroup(group.value, options.reset())]);
return makeSpan(["rlap", options.style.cls()], [inner]);
},
punct: function(group, options, prev) {
return makeSpan("mpunct" + options.color, [textit(group.value)]);
return makeSpan(["mpunct", options.color], [mathrm(group.value)]);
},
ordgroup: function(group, options, prev) {
return makeSpan("mord " + options.style.cls(),
buildExpression(group.value, options)
return makeSpan(["mord", options.style.cls()],
buildExpression(group.value, options.reset())
);
},
namedfn: function(group, options, prev) {
return makeSpan("mop" + options.color, [textit(group.value.slice(1))]);
var chars = [];
for (var i = 1; i < group.value.length; i++) {
chars.push(mathrm(group.value[i]));
}
return makeSpan(["mop", options.color], chars);
},
katex: function(group, options, prev) {
return makeSpan("katex-logo", [
makeSpan("k", [textit("K")]),
makeSpan("a", [textit("A")]),
makeSpan("t", [textit("T")]),
makeSpan("e", [textit("E")]),
makeSpan("x", [textit("X")])
]);
var k = makeSpan(["k"], [mathrm("K")]);
var a = makeSpan(["a"], [mathrm("A")]);
a.height = (a.height + 0.2) * 0.75;
a.depth = (a.height - 0.2) * 0.75;
var t = makeSpan(["t"], [mathrm("T")]);
var e = makeSpan(["e"], [mathrm("E")]);
e.height = (e.height - 0.2155);
e.depth = (e.depth + 0.2155);
var x = makeSpan(["x"], [mathrm("X")]);
return makeSpan(["katex-logo", options.color], [k, a, t, e, x]);
}
};
@ -219,7 +340,22 @@ var buildGroup = function(group, options, prev) {
}
if (groupTypes[group.type]) {
return groupTypes[group.type](group, options, prev);
var groupNode = groupTypes[group.type](group, options, prev);
if (options.style !== options.parentStyle) {
var multiplier = options.style.sizeMultiplier /
options.parentStyle.sizeMultiplier;
if (multiplier > 1) {
throw new ParseError(
"Error: Can't go from small to large style");
}
groupNode.height *= multiplier;
groupNode.depth *= multiplier;
}
return groupNode;
} else {
throw new ParseError(
"Lex error: Got group of unknown type: '" + group.type + "'");
@ -268,7 +404,7 @@ var charLookup = {
"\\mu": "\u03bc",
"\\nu": "\u03bd",
"\\xi": "\u03be",
"\\omicron": "\u03bf",
"\\omicron": "o",
"\\pi": "\u03c0",
"\\rho": "\u03c1",
"\\sigma": "\u03c3",
@ -298,33 +434,45 @@ var charLookup = {
"\\Omega": "\u03a9"
};
var textit = function(value) {
var makeText = function(value, style) {
if (value in charLookup) {
value = charLookup[value];
}
return document.createTextNode(value);
};
var mathit = function(value) {
return makeSpan("mathit", [textit(value)]);
};
var metrics = fontMetrics.getCharacterMetrics(value, style);
var clearNode = function(node) {
if ("textContent" in node) {
node.textContent = "";
if (metrics) {
return new domTree.textNode(value, metrics.height, metrics.depth);
} else {
node.innerText = "";
console && console.warn("No character metrics for '" + value +
"' in style '" + style + "'");
return new domTree.textNode(value, 0, 0);
}
};
var mathit = function(value) {
return makeSpan(["mathit"], [makeText(value, "italic")]);
};
var mathrm = function(value) {
return makeText(value, "roman");
};
var buildTree = function(tree) {
// Setup the default options
var options = new Options(Style.TEXT, "");
var expression = buildExpression(tree, options);
var span = makeSpan(options.style.cls(), expression);
var katexNode = makeSpan("katex", [span]);
var span = makeSpan(["base", options.style.cls()], expression);
var topStrut = makeSpan(["strut"]);
var bottomStrut = makeSpan(["strut", "bottom"]);
return katexNode;
topStrut.style.height = span.height + "em";
bottomStrut.style.height = (span.height + span.depth) + "em";
var katexNode = makeSpan(["katex"], [topStrut, bottomStrut, span]);
return katexNode.toDOM();
};
module.exports = buildTree;

69
domTree.js Normal file
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@ -0,0 +1,69 @@
// These objects store the data about the DOM nodes we create, as well as some
// extra data. They can then be transformed into real DOM nodes with the toDOM
// function. They are useful for both storing extra properties on the nodes, as
// well as providing a way to easily work with the DOM.
function span(classes, children, height, depth, style) {
this.classes = classes || [];
this.children = children || [];
this.height = height || 0;
this.depth = depth || 0;
this.style = style || {};
}
span.prototype.toDOM = function() {
var span = document.createElement("span");
var classes = this.classes.slice();
for (var i = classes.length - 1; i >= 0; i--) {
if (!classes[i]) {
classes.splice(i, 1);
}
}
span.className = classes.join(" ");
for (var style in this.style) {
if (this.style.hasOwnProperty(style)) {
span.style[style] = this.style[style];
}
}
for (var i = 0; i < this.children.length; i++) {
span.appendChild(this.children[i].toDOM());
}
return span;
};
function documentFragment(children, height, depth) {
this.children = children || [];
this.height = height || 0;
this.depth = depth || 0;
}
documentFragment.prototype.toDOM = function() {
var frag = document.createDocumentFragment();
for (var i = 0; i < this.children.length; i++) {
frag.appendChild(this.children[i].toDOM());
}
return frag;
};
function textNode(value, height, depth) {
this.value = value || "";
this.height = height || 0;
this.depth = depth || 0;
}
textNode.prototype.toDOM = function() {
return document.createTextNode(this.value);
};
module.exports = {
span: span,
documentFragment: documentFragment,
textNode: textNode
};

482
fontMetrics.js Normal file
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@ -0,0 +1,482 @@
// These font metrics are extracted from TeX
var sigma1 = 0.025;
var sigma2 = 0;
var sigma3 = 0;
var sigma4 = 0;
var sigma5 = 0.431;
var sigma6 = 1;
var sigma7 = 0;
var sigma8 = 0.677;
var sigma9 = 0.394;
var sigma10 = 0.444;
var sigma11 = 0.686;
var sigma12 = 0.345;
var sigma13 = 0.413;
var sigma14 = 0.363;
var sigma15 = 0.289;
var sigma16 = 0.150;
var sigma17 = 0.247;
var sigma18 = 0.386;
var sigma19 = 0.050;
var sigma20 = 2.390;
var sigma21 = 0.101;
var sigma22 = 0.250;
var xi1 = 0;
var xi2 = 0;
var xi3 = 0;
var xi4 = 0;
var xi5 = .431;
var xi6 = 1;
var xi7 = 0;
var xi8 = .04;
var xi9 = .111;
var xi10 = .166;
var xi11 = .2;
var xi12 = .6;
var xi13 = .1;
// This is just a mapping from common names to real metrics
var metrics = {
xHeight: sigma5,
quad: sigma6,
num1: sigma8,
num2: sigma9,
num3: sigma10,
denom1: sigma11,
denom2: sigma12,
sup1: sigma13,
sup2: sigma14,
sup3: sigma15,
sub1: sigma16,
sub2: sigma17,
supDrop: sigma18,
subDrop: sigma19,
delim1: sigma20,
delim2: sigma21,
axisHeight: sigma22,
defaultRuleThickness: xi8,
bigOpSpacing1: xi9,
bigOpSpacing2: xi10,
bigOpSpacing3: xi11,
bigOpSpacing4: xi12,
bigOpSpacing5: xi13
};
// This map is generated by metrics/metric_parse.py
var metricMap = {
"roman": {
"depth": {
"\u2218": 0.0,
"\u03a5": 0.0,
"$": 0.056,
"\u03a9": 0.0,
"(": 0.25,
",": 0.193,
"0": 0.022,
"4": 0.0,
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},
"typewriter": {
"depth": {},
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}
};
var getCharacterMetrics = function(character, style) {
if (character in metricMap[style].height) {
return {
height: metricMap[style].height[character],
depth: metricMap[style].depth[character]
};
} else {
return null;
}
};
module.exports = {
metrics: metrics,
getCharacterMetrics: getCharacterMetrics
};

7
katex.js
View File

@ -1,8 +1,9 @@
var parseTree = require("./parseTree");
var buildTree = require("./buildTree");
var utils = require("./utils");
var ParseError = require("./ParseError");
var buildTree = require("./buildTree");
var parseTree = require("./parseTree");
var utils = require("./utils");
var process = function(toParse, baseNode) {
var tree = parseTree(toParse);
var node = buildTree(tree);

860
metrics/cmex10.pl Normal file
View File

@ -0,0 +1,860 @@
(FAMILY cmex10)
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@ -0,0 +1,894 @@
(FAMILY cmsy10)
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(CHARWD R 444)
(CHARHT R 705)
(CHARDP R 205)
)
(CHARACTER C y
(CHARWD R 444)
(CHARHT R 705)
(CHARDP R 216)
)
(CHARACTER C z
(CHARWD R 444)
(CHARHT R 705)
(CHARDP R 205)
)
(CHARACTER O 173 (comment paragraph)
(CHARWD R 611)
(CHARHT R 694)
(CHARDP R 194)
)
(CHARACTER O 174 (comment club)
(CHARWD R 777)
(CHARHT R 727)
(CHARDP R 130)
)
(CHARACTER O 175 (comment diamond)
(CHARWD R 777)
(CHARHT R 727)
(CHARDP R 163)
)
(CHARACTER O 176 (comment heart)
(CHARWD R 777)
(CHARHT R 716)
(CHARDP R 33)
)
(CHARACTER O 177 (comment spade)
(CHARWD R 777)
(CHARHT R 727)
(CHARDP R 130)
)
(CHARACTER O 200 (comment arrowleft)
(CHARWD R 1000)
(CHARHT R 511)
(CHARDP R 11)
)
(CHARACTER O 240 (comment space)
(CHARWD R 333)
)
(CHARACTER O 241 (comment minus)
(CHARWD R 777)
(CHARHT R 270)
)
(CHARACTER O 242 (comment periodcentered)
(CHARWD R 277)
(CHARHT R 303)
)
(CHARACTER O 243 (comment multiply)
(CHARWD R 777)
(CHARHT R 491)
)
(CHARACTER O 244 (comment asteriskmath)
(CHARWD R 500)
(CHARHT R 465)
)
(CHARACTER O 245 (comment divide)
(CHARWD R 777)
(CHARHT R 529)
(CHARDP R 29)
)
(CHARACTER O 246 (comment diamondmath)
(CHARWD R 500)
(CHARHT R 488)
)
(CHARACTER O 247 (comment plusminus)
(CHARWD R 777)
(CHARHT R 666)
)
(CHARACTER O 250 (comment minusplus)
(CHARWD R 777)
(CHARHT R 500)
(CHARDP R 166)
)
(CHARACTER O 251 (comment circleplus)
(CHARWD R 777)
(CHARHT R 583)
(CHARDP R 83)
)
(CHARACTER O 252 (comment circleminus)
(CHARWD R 777)
(CHARHT R 583)
(CHARDP R 83)
)
(CHARACTER O 255 (comment circlemultiply)
(CHARWD R 777)
(CHARHT R 583)
(CHARDP R 83)
)
(CHARACTER O 256 (comment circledivide)
(CHARWD R 777)
(CHARHT R 583)
(CHARDP R 83)
)
(CHARACTER O 257 (comment circledot)
(CHARWD R 777)
(CHARHT R 583)
(CHARDP R 83)
)
(CHARACTER O 260 (comment circlecopyrt)
(CHARWD R 1000)
(CHARHT R 716)
(CHARDP R 216)
)
(CHARACTER O 261 (comment openbullet)
(CHARWD R 500)
(CHARHT R 444)
)
(CHARACTER O 262 (comment bullet)
(CHARWD R 500)
(CHARHT R 444)
)
(CHARACTER O 263 (comment equivasymptotic)
(CHARWD R 777)
(CHARHT R 484)
)
(CHARACTER O 264 (comment equivalence)
(CHARWD R 777)
(CHARHT R 464)
)
(CHARACTER O 265 (comment reflexsubset)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 266 (comment reflexsuperset)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 267 (comment lessequal)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 270 (comment greaterequal)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 271 (comment precedesequal)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 272 (comment followsequal)
(CHARWD R 777)
(CHARHT R 636)
(CHARDP R 137)
)
(CHARACTER O 273 (comment similar)
(CHARWD R 777)
(CHARHT R 367)
)
(CHARACTER O 274 (comment approxequal)
(CHARWD R 777)
(CHARHT R 483)
)
(CHARACTER O 275 (comment propersubset)
(CHARWD R 777)
(CHARHT R 540)
(CHARDP R 40)
)
(CHARACTER O 276 (comment propersuperset)
(CHARWD R 777)
(CHARHT R 540)
(CHARDP R 40)
)
(CHARACTER O 277 (comment lessmuch)
(CHARWD R 1000)
(CHARHT R 566)
(CHARDP R 66)
)
(CHARACTER O 300 (comment greatermuch)
(CHARWD R 1000)
(CHARHT R 566)
(CHARDP R 66)
)
(CHARACTER O 301 (comment precedes)
(CHARWD R 777)
(CHARHT R 539)
(CHARDP R 40)
)
(CHARACTER O 302 (comment follows)
(CHARWD R 777)
(CHARHT R 539)
(CHARDP R 40)
)
(CHARACTER O 303 (comment arrowleft)
(CHARWD R 1000)
(CHARHT R 511)
(CHARDP R 11)
)
(CHARACTER O 304 (comment spade)
(CHARWD R 777)
(CHARHT R 727)
(CHARDP R 130)
)

328
metrics/metric_parse.py Executable file
View File

@ -0,0 +1,328 @@
#!/usr/bin/env python
import re
import json
import os
expr_start = re.compile(r"\s*\(")
expr_value = re.compile(r"\s*([^\s\)]+)")
expr_end = re.compile(r"\s*\)")
empty = re.compile(r"\s*$")
def inner_parse_expr(expr):
l = []
while True:
if re.match(empty, expr):
return expr, l
elif re.match(expr_start, expr):
match = re.match(expr_start, expr)
new_expr = expr[len(match.group(0)):]
expr, group = inner_parse_expr(new_expr)
l.append(group)
elif re.match(expr_value, expr):
match = re.match(expr_value, expr)
expr = expr[len(match.group(0)):]
l.append(match.group(1))
elif re.match(expr_end, expr):
match = re.match(expr_end, expr)
new_expr = expr[len(match.group(0)):]
return new_expr, l
else:
raise ValueError("Invalid input")
def parse_expr(expr):
_, group = inner_parse_expr(expr)
return group
def read_pl(pl_file):
with open(pl_file) as pl:
return parse_expr(pl.read())
class Metric:
def __init__(self, char, height, depth):
self.char = char
self.height = float(height) / 1000
self.depth = float(depth) / 1000
def __repr__(self):
return "Char {0} ({1:.3f}+{2:.3f})".format(
self.char, self.height, self.depth)
# Different styles of text, found on page 13 of The TeX book
ROMAN = "roman"
SLANTED = "slanted"
ITALIC = "italic"
TYPEWRITER = "typewriter"
BOLD = "bold"
# The numbers used in this map are all in octal, because that's how all the
# charts for the numbers are written
file_map = {
"cmmi10.pl": {
13: (u"\u03b1", ITALIC), # \alpha
14: (u"\u03b2", ITALIC), # \beta
15: (u"\u03b3", ITALIC), # \gamma
16: (u"\u03b4", ITALIC), # \delta
17: (u"\u03b5", ITALIC), # \varepsilon
20: (u"\u03b6", ITALIC), # \zeta
21: (u"\u03b7", ITALIC), # \eta
22: (u"\u03b8", ITALIC), # \theta
23: (u"\u03b9", ITALIC), # \iota
24: (u"\u03ba", ITALIC), # \kappa
25: (u"\u03bb", ITALIC), # \lambda
26: (u"\u03bc", ITALIC), # \mu
27: (u"\u03bd", ITALIC), # \nu
30: (u"\u03be", ITALIC), # \xi
31: (u"\u03c0", ITALIC), # \pi
32: (u"\u03c1", ITALIC), # \rho
33: (u"\u03c3", ITALIC), # \sigma
34: (u"\u03c4", ITALIC), # \tau
35: (u"\u03c5", ITALIC), # \upsilon
36: (u"\u03d5", ITALIC), # \phi
37: (u"\u03c7", ITALIC), # \chi
40: (u"\u03c8", ITALIC), # \psi
41: (u"\u03c9", ITALIC), # \omega
42: (u"\u03b5", ITALIC), # \epsilon
43: (u"\u03d1", ITALIC), # \vartheta
44: (u"\u03d6", ITALIC), # \varpi
45: (u"\u03f1", ITALIC), # \varrho
46: (u"\u03c2", ITALIC), # \varsigma
47: (u"\u03c6", ITALIC), # \varphi
72: (u".", ROMAN),
73: (u",", ROMAN),
74: (u"<", ROMAN),
75: (u"/", ROMAN),
76: (u">", ROMAN),
101: (u"A", ITALIC),
102: (u"B", ITALIC),
103: (u"C", ITALIC),
104: (u"D", ITALIC),
105: (u"E", ITALIC),
106: (u"F", ITALIC),
107: (u"G", ITALIC),
110: (u"H", ITALIC),
111: (u"I", ITALIC),
112: (u"J", ITALIC),
113: (u"K", ITALIC),
114: (u"L", ITALIC),
115: (u"M", ITALIC),
116: (u"N", ITALIC),
117: (u"O", ITALIC),
120: (u"P", ITALIC),
121: (u"Q", ITALIC),
122: (u"R", ITALIC),
123: (u"S", ITALIC),
124: (u"T", ITALIC),
125: (u"U", ITALIC),
126: (u"V", ITALIC),
127: (u"W", ITALIC),
130: (u"X", ITALIC),
131: (u"Y", ITALIC),
132: (u"Z", ITALIC),
141: (u"a", ITALIC),
142: (u"b", ITALIC),
143: (u"c", ITALIC),
144: (u"d", ITALIC),
145: (u"e", ITALIC),
146: (u"f", ITALIC),
147: (u"g", ITALIC),
150: (u"h", ITALIC),
151: (u"i", ITALIC),
152: (u"j", ITALIC),
153: (u"k", ITALIC),
154: (u"l", ITALIC),
155: (u"m", ITALIC),
156: (u"n", ITALIC),
157: (u"o", ITALIC),
160: (u"p", ITALIC),
161: (u"q", ITALIC),
162: (u"r", ITALIC),
163: (u"s", ITALIC),
164: (u"t", ITALIC),
165: (u"u", ITALIC),
166: (u"v", ITALIC),
167: (u"w", ITALIC),
170: (u"x", ITALIC),
171: (u"y", ITALIC),
172: (u"z", ITALIC),
},
"cmr10.pl": {
0: (u"\u0393", ROMAN), # \Gamma
1: (u"\u0394", ROMAN), # \Delta
2: (u"\u0398", ROMAN), # \Theta
3: (u"\u039b", ROMAN), # \Lambda
4: (u"\u039e", ROMAN), # \Xi
5: (u"\u03a0", ROMAN), # \Pi
6: (u"\u03a3", ROMAN), # \Sigma
7: (u"\u03a5", ROMAN), # \Upsilon
10: (u"\u03a6", ROMAN), # \Phi
11: (u"\u03a8", ROMAN), # \Psi
12: (u"\u03a9", ROMAN), # \Omega
41: (u"!", ROMAN),
42: (u"\"", ROMAN),
44: (u"$", ROMAN),
50: (u"(", ROMAN),
51: (u")", ROMAN),
53: (u"+", ROMAN),
60: (u"0", ROMAN),
61: (u"1", ROMAN),
62: (u"2", ROMAN),
63: (u"3", ROMAN),
64: (u"4", ROMAN),
65: (u"5", ROMAN),
66: (u"6", ROMAN),
67: (u"7", ROMAN),
70: (u"8", ROMAN),
71: (u"9", ROMAN),
72: (u":", ROMAN),
73: (u";", ROMAN),
75: (u"=", ROMAN),
77: (u"?", ROMAN),
100: (u"@", ROMAN),
101: (u"A", ROMAN),
102: (u"B", ROMAN),
103: (u"C", ROMAN),
104: (u"D", ROMAN),
105: (u"E", ROMAN),
106: (u"F", ROMAN),
107: (u"G", ROMAN),
110: (u"H", ROMAN),
111: (u"I", ROMAN),
112: (u"J", ROMAN),
113: (u"K", ROMAN),
114: (u"L", ROMAN),
115: (u"M", ROMAN),
116: (u"N", ROMAN),
117: (u"O", ROMAN),
120: (u"P", ROMAN),
121: (u"Q", ROMAN),
122: (u"R", ROMAN),
123: (u"S", ROMAN),
124: (u"T", ROMAN),
125: (u"U", ROMAN),
126: (u"V", ROMAN),
127: (u"W", ROMAN),
130: (u"X", ROMAN),
131: (u"Y", ROMAN),
132: (u"Z", ROMAN),
133: (u"[", ROMAN),
135: (u"]", ROMAN),
140: (u"`", ROMAN),
141: (u"a", ROMAN),
142: (u"b", ROMAN),
143: (u"c", ROMAN),
144: (u"d", ROMAN),
145: (u"e", ROMAN),
146: (u"f", ROMAN),
147: (u"g", ROMAN),
150: (u"h", ROMAN),
151: (u"i", ROMAN),
152: (u"j", ROMAN),
153: (u"k", ROMAN),
154: (u"l", ROMAN),
155: (u"m", ROMAN),
156: (u"n", ROMAN),
157: (u"o", ROMAN),
160: (u"p", ROMAN),
161: (u"q", ROMAN),
162: (u"r", ROMAN),
163: (u"s", ROMAN),
164: (u"t", ROMAN),
165: (u"u", ROMAN),
166: (u"v", ROMAN),
167: (u"w", ROMAN),
170: (u"x", ROMAN),
171: (u"y", ROMAN),
172: (u"z", ROMAN),
},
"cmsy10.pl": {
0: (u"\u2212", ROMAN), # -
1: (u"\u22c5", ROMAN), # \cdot
2: (u"\u00d7", ROMAN), # \times
3: (u"\u2217", ROMAN), # *
4: (u"\u00f7", ROMAN), # \div
6: (u"\u00b1", ROMAN), # \pm
16: (u"\u2218", ROMAN), # \circ
24: (u"\u2264", ROMAN), # \leq
25: (u"\u2265", ROMAN), # \geq
40: (u"\u2190", ROMAN), # \leftarrow
41: (u"\u2192", ROMAN), # \rightarrow
60: (u"\u2032", ROMAN), # \prime
61: (u"\u221e", ROMAN), # \infty
152: (u"|", ROMAN), # |
}
}
def read_metrics(pl_file, metrics):
pl = read_pl(pl_file)
metrics_to_read = file_map[pl_file]
for elem in pl:
if elem[0] == "CHARACTER":
if elem[1] == "C":
char = int(oct(ord(elem[2])))
elif elem[1] == "O":
char = int(elem[2])
else:
continue
if not char in metrics_to_read:
continue
map_char, map_style = metrics_to_read[char]
char_height = 0
char_depth = 0
for metric in elem[3:]:
if metric[0] == "comment":
continue
elif metric[0] == "CHARHT":
char_height = int(metric[2])
elif metric[0] == "CHARDP":
char_depth = int(metric[2])
metrics[map_style].append(
Metric(map_char, char_height, char_depth))
def print_metrics(metrics):
metric_map = {
style: {
"height": {
metric.char: metric.height for metric in metric_list
},
"depth": {
metric.char: metric.depth for metric in metric_list
},
} for style, metric_list in metrics.iteritems()
}
print "var metricMap = {0};".format(json.dumps(metric_map, indent=4))
if __name__ == "__main__":
os.chdir(os.path.dirname(os.path.realpath(__file__)))
metrics = {
"roman": [],
"italic": [],
"slanted": [],
"typewriter": [],
"bold": [],
}
for metric_file in file_map:
read_metrics(metric_file, metrics)
metrics["roman"].append(Metric(u'\u00a0', 0, 0))
print_metrics(metrics)

6
package.json
View File

@ -3,10 +3,8 @@
"version": "0.0.1",
"devDependencies": {
"browserify": "~2.23.1",
"ebnf-parser": "~0.1.5",
"express": "~3.3.3",
"lex-parser": "~0.1.2",
"jison": "~0.4.6",
"through": "~2.3.4"
"less": "~1.4.2"
"through": "~2.3.4",
}
}

1
server.js
View File

@ -38,6 +38,7 @@ app.get("/test/katex-tests.js", function(req, res, next) {
});
app.use(express.static(path.join(__dirname, "static")));
app.use(express.static(path.join(__dirname, "build")));
app.use("/test", express.static(path.join(__dirname, "test")));
app.use(function(err, req, res, next) {

12
static/index.html
View File

@ -1,14 +1,20 @@
<!doctype html>
<!DOCTYPE html>
<html>
<head>
<title>KaTeX Test</title>
<script src="katex.js" type="text/javascript"></script>
<script src="main.js" type="text/javascript"></script>
<link href="katex.css" rel="stylesheet" type="text/css">
<link href="katex.less" rel="stylesheet" type="text/less">
<link href="main.css" rel="stylesheet" type="text/css">
<!--[if gte IE 9]><!-->
<script src="//cdnjs.cloudflare.com/ajax/libs/less.js/1.4.1/less.min.js"></script>
<!--<![endif]-->
<!--[if lt IE 9]>
<link href="katex.less.css" rel="stylesheet" type="text/css">
<![endif]-->
</head>
<body>
<input type="text" value="\blue\dfrac{2(y-z)}{3} \div \orange{\arctan x^{4/3}}" id="input" />
<input type="text" value="\blue\dfrac{\frac{\phi^2}{3}-G_a^{x^3}}{2\times3+4}+\orange\dfrac{(x^2+y^2)^\frac{1}{2}}{\tan\psi^\tau+2/3}" id="input" />
<div id="math"></div>
</body>
</html>

185
static/katex.css
View File

@ -1,185 +0,0 @@
@import "fonts/fonts.css";
/*
thin space: 1/6 quad
medium space: 2/9 quad
thick space: 5/18 quad
things to do:
^ _ and styles
\sin
\sum, \int, \lim
\frac
\sqrt
big parens
*/
.katex {
font: normal 1.21em katex_main;
line-height: 1.2;
white-space: nowrap;
}
.katex .mathit {
font-family: katex_math;
font-style: italic;
}
.katex .textstyle > .mbin + .minner { margin-left: 0.22222em; }
.katex .textstyle > .mbin + .mop { margin-left: 0.22222em; }
.katex .textstyle > .mbin + .mopen { margin-left: 0.22222em; }
.katex .textstyle > .mbin + .mord { margin-left: 0.22222em; }
.katex .textstyle > .mclose + .mbin { margin-left: 0.22222em; }
.katex .textstyle > .mclose + .minner { margin-left: 0.16667em; }
.katex .mclose + .mop { margin-left: 0.16667em; }
.katex .textstyle > .mclose + .mrel { margin-left: 0.27778em; }
.katex .textstyle > .minner + .mbin { margin-left: 0.22222em; }
.katex .textstyle > .minner + .minner { margin-left: 0.16667em; }
.katex .minner + .mop { margin-left: 0.16667em; }
.katex .textstyle > .minner + .mopen { margin-left: 0.16667em; }
.katex .textstyle > .minner + .mord { margin-left: 0.16667em; }
.katex .textstyle > .minner + .mpunct { margin-left: 0.16667em; }
.katex .textstyle > .minner + .mrel { margin-left: 0.27778em; }
.katex .textstyle > .mop + .minner { margin-left: 0.16667em; }
.katex .mop + .mop { margin-left: 0.16667em; }
.katex .mop + .mord { margin-left: 0.16667em; }
.katex .textstyle > .mop + .mrel { margin-left: 0.27778em; }
.katex .textstyle > .mord + .mbin { margin-left: 0.22222em; }
.katex .textstyle > .mord + .minner { margin-left: 0.16667em; }
.katex .mord + .mop { margin-left: 0.16667em; }
.katex .textstyle > .mord + .mrel { margin-left: 0.27778em; }
.katex .textstyle > .mpunct + .mbin { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mclose { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .minner { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mop { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mopen { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mord { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mpunct { margin-left: 0.16667em; }
.katex .textstyle > .mpunct + .mrel { margin-left: 0.16667em; }
.katex .textstyle > .mrel + .minner { margin-left: 0.27778em; }
.katex .textstyle > .mrel + .mop { margin-left: 0.27778em; }
.katex .textstyle > .mrel + .mopen { margin-left: 0.27778em; }
.katex .textstyle > .mrel + .mord { margin-left: 0.27778em; }
.katex .textstyle > .scriptstyle { font-size: 0.66667em; }
.katex .scriptstyle > .scriptscriptstyle { font-size: 0.75em; }
.katex .msub {
vertical-align: bottom;
position: relative;
top: 0.2em;
}
.katex .msup {
position: relative;
top: -0.5em;
}
.katex .msupsub {
display: inline-table;
table-layout: fixed;
vertical-align: middle;
}
.katex .msupsub > .msup, .katex .msupsub > .msub {
display: table-row;
vertical-align: baseline;
}
.katex .mfrac { display: inline-table; }
/* TODO(alpert): Where do these numbers come from? */
.katex .mfrac.textstyle.displaystyle { vertical-align: 0.58em; }
.katex .mfrac.textstyle { vertical-align: 0.50em; }
.katex .mfrac.scriptstyle { vertical-align: 0.50em; }
.katex .mfrac.scriptscriptstyle { vertical-align: 0.6em; }
.katex .mfracnum, .katex .mfracmid, .katex .mfracden {
display: table-row;
text-align: center;
}
.katex .mfracmid:before {
border-bottom-style: solid;
border-bottom-width: 1px;
content: "";
display: block;
}
.katex .mfracmid:after {
border-bottom-style: solid;
border-bottom-width: 0.05em;
content: "";
display: block;
margin-top: -1px;
}
.katex .mfracnum > span {
display: inline-block;
vertical-align: bottom;
}
.katex .mspace {
display: inline-block;
}
.katex .mspace.thinspace {
width: 0.16667em;
}
.katex .mspace.mediumspace {
width: 0.22222em;
}
.katex .mspace.thickspace {
width: 0.27778em;
}
.katex .mspace.quad {
width: 1em;
}
.katex .mspace.qquad {
width: 2em;
}
.katex .llap, .katex .rlap {
width: 0;
position: relative;
}
.katex .llap > span {
position: absolute;
right: 0;
}
.katex .rlap > span {
position: absolute;
left: 0;
}
.katex .blue { color: #6495ed; }
.katex .orange { color: #ffa500; }
.katex .pink { color: #ff00af; }
.katex .red { color: #df0030; }
.katex .green { color: #28ae7b; }
.katex .gray { color: gray; }
.katex .purple { color: #9d38bd; }
.katex .katex-logo .a {
font-size: 0.75em;
margin-left: -0.32em;
position: relative;
top: -0.2em;
}
.katex .katex-logo .t {
margin-left: -0.23em;
}
.katex .katex-logo .e {
margin-left: -0.1667em;
position: relative;
top: 0.2155em;
}
.katex .katex-logo .x {
margin-left: -0.125em;
}

289
static/katex.less Normal file
View File

@ -0,0 +1,289 @@
@import "fonts/fonts.css";
/*
things to do:
\sum, \int, \lim
\sqrt
big parens
*/
.katex {
display: inline-block;
font: normal 1.21em katex_main;
line-height: 1.2;
white-space: nowrap;
.base {
display: inline-block;
}
.strut {
display: inline-block;
&.bottom {
vertical-align: top;
}
}
.mathit {
font-family: katex_math;
font-style: italic;
}
@thinspace: 0.16667em;
@mediumspace: 0.22222em;
@thickspace: 0.27778em;
.textstyle {
> .mord {
& + .mord {}
& + .mop { margin-left: @thinspace; }
& + .mbin { margin-left: @mediumspace; }
& + .mrel { margin-left: @thickspace; }
& + .mopen {}
& + .mclose {}
& + .mpunct {}
& + .minner { margin-left: @thinspace; }
}
> .mop {
& + .mord { margin-left: @thinspace; }
& + .mop { margin-left: @thinspace; }
& + .mbin {}
& + .mrel { margin-left: @thickspace; }
& + .mopen {}
& + .mclose {}
& + .mpunct {}
& + .minner { margin-left: @thinspace; }
}
> .mbin {
& + .mord { margin-left: @mediumspace; }
& + .mop { margin-left: @mediumspace; }
& + .mbin {}
& + .mrel {}
& + .mopen { margin-left: @mediumspace; }
& + .mclose {}
& + .mpunct {}
& + .minner { margin-left: @mediumspace; }
}
> .mrel {
& + .mord { margin-left: @thickspace; }
& + .mop { margin-left: @thickspace; }
& + .mbin {}
& + .mrel {}
& + .mopen { margin-left: @thickspace; }
& + .mclose {}
& + .mpunct {}
& + .minner { margin-left: @thickspace; }
}
> .mopen {
& + .mord {}
& + .mop {}
& + .mbin {}
& + .mrel {}
& + .mopen {}
& + .mclose {}
& + .mpunct {}
& + .minner {}
}
> .mclose {
& + .mord {}
& + .mop { margin-left: @thinspace; }
& + .mbin { margin-left: @mediumspace; }
& + .mrel { margin-left: @thickspace; }
& + .mopen {}
& + .mclose {}
& + .mpunct {}
& + .minner { margin-left: @thinspace; }
}
> .mpunct {
& + .mord { margin-left: @thinspace; }
& + .mop { margin-left: @thinspace; }
& + .mbin {}
& + .mrel { margin-left: @thinspace; }
& + .mopen { margin-left: @thinspace; }
& + .mclose { margin-left: @thinspace; }
& + .mpunct { margin-left: @thinspace; }
& + .minner { margin-left: @thinspace; }
}
> .minner {
& + .mord { margin-left: @thinspace; }
& + .mop { margin-left: @thinspace; }
& + .mbin { margin-left: @mediumspace; }
& + .mrel { margin-left: @thickspace; }
& + .mopen { margin-left: @thinspace; }
& + .mclose {}
& + .mpunct { margin-left: @thinspace; }
& + .minner { margin-left: @thinspace; }
}
}
.mord {
& + .mop { margin-left: @thinspace; }
}
.mop {
& + .mord { margin-left: @thinspace; }
& + .mop { margin-left: @thinspace; }
}
.mclose {
& + .mop { margin-left: @thinspace; }
}
.minner {
& + .mop { margin-left: @thinspace; }
}
.reset-textstyle.textstyle { font-size: 1em; }
.reset-textstyle.scriptstyle { font-size: 0.66667em; }
.reset-textstyle.scriptscriptstyle { font-size: 0.5em; }
.reset-scriptstyle.textstyle { font-size: 1.5em; }
.reset-scriptstyle.scriptstyle { font-size: 1em; }
.reset-scriptstyle.scriptscriptstyle { font-size: 0.75em; }
.reset-scriptscriptstyle.textstyle { font-size: 2em; }
.reset-scriptscriptstyle.scriptstyle { font-size: 1.5em; }
.reset-scriptscriptstyle.scriptscriptstyle { font-size: 1em; }
.baseline-align-hack-outer {
display: inline-block;
vertical-align: top;
}
.baseline-align-hack-middle {
display: block;
height: 0;
}
.baseline-align-hack-inner {
display: inline-block;
}
.msupsub {
.baseline-align-hack-outer;
text-align: left;
.msup,
.msub {
.baseline-align-hack-middle;
position: relative;
> span {
.baseline-align-hack-inner;
}
}
}
.mfrac {
.baseline-align-hack-outer;
.mfracnum,
.mfracmid,
.mfracden {
.baseline-align-hack-middle;
position: relative;
text-align: center;
> span {
.baseline-align-hack-inner;
}
}
.mfracmid > span {
width: 100%;
&:before {
border-bottom-style: solid;
border-bottom-width: 1px;
content: "";
display: block;
}
&:after {
border-bottom-style: solid;
border-bottom-width: 0.05em;
content: "";
display: block;
margin-top: -1px;
}
}
}
.mspace {
display: inline-block;
&.thinspace {
width: @thinspace;
}
&.mediumspace {
width: @mediumspace;
}
&.thickspace {
width: @thickspace;
}
&.quad {
width: 1em;
}
&.qquad {
width: 2em;
}
}
.llap,
.rlap {
width: 0;
position: relative;
> span {
position: absolute;
}
}
.llap > span {
right: 0;
}
.rlap > span {
left: 0;
}
.blue { color: #6495ed; }
.orange { color: #ffa500; }
.pink { color: #ff00af; }
.red { color: #df0030; }
.green { color: #28ae7b; }
.gray { color: gray; }
.purple { color: #9d38bd; }
.katex-logo {
.a {
font-size: 0.75em;
margin-left: -0.32em;
position: relative;
top: -0.2em;
}
.t {
margin-left: -0.23em;
}
.e {
margin-left: -0.1667em;
position: relative;
top: 0.2155em;
}
.x {
margin-left: -0.125em;
}
}
}

3
static/main.css
View File

@ -1,9 +1,12 @@
body {
margin: 0px;
padding: 0px;
font-size: 72px;
}
input {
margin: 0px;
font-size: 100%;
width: 100%;
box-sizing: border-box;
}

8
test/katex-tests.js
View File

@ -182,19 +182,19 @@ describe("A subscript and superscript parser", function() {
}).not.toThrow();
});
it("should produce sups for superscript", function() {
it("should produce supsubs for superscript", function() {
var parse = parseTree("x^2")[0];
expect(parse.type).toBe("sup");
expect(parse.type).toBe("supsub");
expect(parse.value.base).toBeDefined();
expect(parse.value.sup).toBeDefined();
expect(parse.value.sub).toBeUndefined();
});
it("should produce subs for subscript", function() {
it("should produce supsubs for subscript", function() {
var parse = parseTree("x_3")[0];
expect(parse.type).toBe("sub");
expect(parse.type).toBe("supsub");
expect(parse.value.base).toBeDefined();
expect(parse.value.sub).toBeDefined();
expect(parse.value.sup).toBeUndefined();

31
utils.js
View File

@ -13,36 +13,6 @@ function slowContains(list, elem) {
var contains = Array.prototype.indexOf ? fastContains : slowContains;
function isBuggyWebKit() {
var userAgent = navigator.userAgent.toLowerCase();
var webkit = (/applewebkit\/(\d+)\.(\d+)/).exec(userAgent);
if (!webkit) {
return false;
}
var major = +webkit[1];
var minor = +webkit[2];
// 537.1 is last buggy, according to Chrome's bisect-builds.py which says:
//
// You are probably looking for a change made after 137695 (known bad), but
// no later than 137702 (first known good).
// CHANGELOG URL:
// http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog.html?url=/trunk/src&range=137695%3A137702
//
// Downloading these two builds:
// http://commondatastorage.googleapis.com/chromium-browser-snapshots/Mac/137695/chrome-mac.zip
// http://commondatastorage.googleapis.com/chromium-browser-snapshots/Mac/137702/chrome-mac.zip
// verifies this claim. The respective WebKit versions (r117232 and
// r117456) both are called 537.1 so let's throw out 537.1 as well as
// everything older.
//
// The responsible WebKit changeset appears to be this one:
// http://trac.webkit.org/changeset/117339/
return major < 537 || (major == 537 && minor <= 1);
}
var setTextContent;
var testNode = document.createElement("span");
@ -62,7 +32,6 @@ function clearNode(node) {
module.exports = {
contains: contains,
isBuggyWebKit: isBuggyWebKit(),
setTextContent: setTextContent,
clearNode: clearNode
};