fe6b67817c
Summary:
Follow the instructions in the TeX book for drawing \overlines. This uses the
same code as fractions to produce the bars. Also added the ability to cramp
styles (i.e. T -> T' and T' -> T').
Test Plan:
- Look at `\overline{x}`, `\overline{\dfrac{x}{y}+z}`, and
`\blue{\overline{x}}` to make sure they look good.
- Make sure the tests work
- Make sure the huxley tests look good (Not here yet :( )
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D11604
82 lines
1.7 KiB
JavaScript
82 lines
1.7 KiB
JavaScript
function Style(id, size, multiplier, cramped) {
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this.id = id;
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this.size = size;
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this.cramped = cramped;
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this.sizeMultiplier = multiplier;
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}
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Style.prototype.sup = function() {
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return styles[sup[this.id]];
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};
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Style.prototype.sub = function() {
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return styles[sub[this.id]];
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};
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Style.prototype.fracNum = function() {
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return styles[fracNum[this.id]];
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};
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Style.prototype.fracDen = function() {
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return styles[fracDen[this.id]];
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};
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Style.prototype.cramp = function() {
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return styles[cramp[this.id]];
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};
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// HTML class name, like "displaystyle cramped"
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Style.prototype.cls = function() {
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return sizeNames[this.size] + (this.cramped ? " cramped" : " uncramped");
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};
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// HTML Reset class name, like "reset-textstyle"
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Style.prototype.reset = function() {
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return resetNames[this.size];
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};
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var D = 0;
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var Dc = 1;
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var T = 2;
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var Tc = 3;
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var S = 4;
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var Sc = 5;
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var SS = 6;
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var SSc = 7;
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var sizeNames = [
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"displaystyle textstyle",
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"textstyle",
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"scriptstyle",
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"scriptscriptstyle"
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];
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var resetNames = [
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"reset-textstyle",
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"reset-textstyle",
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"reset-scriptstyle",
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"reset-scriptscriptstyle",
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];
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var styles = [
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new Style(D, 0, 1.0, false),
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new Style(Dc, 0, 1.0, true),
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new Style(T, 1, 1.0, false),
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new Style(Tc, 1, 1.0, true),
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new Style(S, 2, 0.66667, false),
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new Style(Sc, 2, 0.66667, true),
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new Style(SS, 3, 0.5, false),
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new Style(SSc, 3, 0.5, true)
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];
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var sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];
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var sub = [Sc, Sc, Sc, Sc, SSc, SSc, SSc, SSc];
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var fracNum = [T, Tc, S, Sc, SS, SSc, SS, SSc];
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var fracDen = [Tc, Tc, Sc, Sc, SSc, SSc, SSc, SSc];
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var cramp = [Dc, Dc, Tc, Tc, Sc, Sc, SSc, SSc];
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module.exports = {
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DISPLAY: styles[D],
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TEXT: styles[T]
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};
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