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up to and including section 21

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Pomax
2016-01-04 16:17:01 -08:00
parent 8b78e22ac4
commit 76fc269b07
37 changed files with 5576 additions and 3407 deletions
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71
lib/latex-loader.js
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@@ -1,35 +1,32 @@
var sha1 = require("sha1");
var fs = require("fs");
var execSync = require("child_process").execSync;
var blockLoader = require("block-loader");
var op = "\\[";
var ed = "\\]";
var options = {
start: "\\[",
end: "\\]",
/**
* Is there going to be anything to convert here?
*/
function hasLaTeX(input) {
return input.indexOf(op) !== -1 && input.indexOf(ed) !== -1;
}
/**
* We look for MathJax/KaTeX style data, and make sure
* it is escaped properly so that JSX conversion will
* still work.
*/
function escapeBlockLaTeX(source) {
// we can't do this with regexp, unfortunately.
var from = 0, curr, term;
var newsource = "", latex;
for(curr = source.indexOf(op, from); curr !== -1; from = term + ed.length, curr = source.indexOf(op, from)) {
newsource += source.substring(from, curr);
term = source.indexOf(ed, from);
if(term === -1) {
// that's a problem...
throw new Error("improperly closed LaTeX encountered!");
preprocessors: [
/**
* convert some convenience colour markers to true LaTeX form.
*/
function colorPreProcess(input) {
var regexp = new RegExp("([A-Z]+)\\[([^\\]]+)\\]",'g');
var output = input.replace(regexp, function(_,color,content) {
if(content.indexOf(" ")!==-1) { content = " " + content; }
return "{\\color{"+color.toLowerCase()+"}"+content.replace(/ /g,"\\ ")+"}";
});
return output;
}
latex = source.substring(curr, term + ed.length);
],
/**
* We look for MathJax/KaTeX style data, and make sure
* it is escaped properly so that JSX conversion will
* still work.
*/
process: function escapeBlockLaTeX(latex) {
// convert this LaTeX code into an SVG file in ./images/latex,
// using mathjax-node in the ./tools directory.
var hash = sha1(latex);
@@ -53,29 +50,9 @@ function escapeBlockLaTeX(source) {
var ex2rem = 0.45;
var w = parseFloat(svg.match(/width="([^"]+)"/)[1]) * ex2rem;
var h = parseFloat(svg.match(/height="([^"]+)"/)[1]) * ex2rem;
var rewrite = `<img className="LaTeX SVG" src="${filename}" style={{width:"${w}rem", height:"${h}rem"}} />`;
newsource += rewrite;
return `<img className="LaTeX SVG" src="${filename}" style={{width:"${w}rem", height:"${h}rem"}} />`;
}
return newsource + source.substring(from);
}
/**
* ...
*/
function colorPreProcess(input) {
var regexp = new RegExp("([A-Z]+)\\[([^\\]]+)\\]",'g');
var output = input.replace(regexp, function(_,color,content) {
if(content.indexOf(" ")!==-1) { content = " " + content; }
return "{\\color{"+color.toLowerCase()+"}"+content.replace(/ /g,"\\ ")+"}";
});
return output;
};
module.exports = function(source) {
this.cacheable();
if (!hasLaTeX(source)) return source;
return escapeBlockLaTeX(colorPreProcess(source));
};
module.exports = blockLoader(options);