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render.js
Libattery
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Authored By
Libattery
Dec 11 2019, 8:28 AM
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3 KB
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render.js
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// Render an AST.
"use strict";
var ast = require('./ast');
ast.RenderT.defineVisitor("tex_part", {
TEX_ONLY: function(t) { return t; }
});
var render = module.exports = function render(e) {
if (Array.isArray(e)) {
return e.map(render).join('');
}
return e.render_tex();
};
var curlies = function(t) {
switch (t.constructor) {
// constructs which are surrounded by curlies
case ast.Tex.FUN1:
case ast.Tex.FUN1hl:
case ast.Tex.FUN1hf:
case ast.Tex.DECLh:
case ast.Tex.FUN2:
case ast.Tex.FUN2h:
case ast.Tex.FUN2sq:
case ast.Tex.CURLY:
case ast.Tex.INFIX:
case ast.Tex.INFIXh:
case ast.Tex.BOX:
case ast.Tex.BIG:
case ast.Tex.MATRIX:
return t.render_tex();
case String:
break;
default:
t = t.render_tex();
}
return "{" + t + "}";
};
var render_curlies = function(a) {
if (a.length === 1) {
return curlies(a[0]);
}
return curlies(render(a));
};
var dollar = function(t) {
switch (t.constructor) {
case String:
break;
default:
t = t.render_tex();
}
return "$" + t + "$";
};
var render_dollar = function(a) {
if (a.length === 1) {
return dollar(a[0]);
}
return dollar(render(a));
};
ast.Tex.defineVisitor("render_tex", {
FQ: function(base, down, up) {
return base.render_tex() + "_" + curlies(down) + "^" + curlies(up);
},
DQ: function(base, down) {
return base.render_tex() + "_" + curlies(down);
},
UQ: function(base, up) {
return base.render_tex() + "^" + curlies(up);
},
FQN: function(down, up) {
return "_" + curlies(down) + "^" + curlies(up);
},
DQN: function(down) {
return "_" + curlies(down);
},
UQN: function(up) {
return "^" + curlies(up);
},
LITERAL: function(r) {
return r.tex_part();
},
FUN1: function(f, a) {
return curlies(f + " " + curlies(a));
},
MHCHEM: function(f, a) {
return curlies(f + " " + curlies(a));
},
CHEM_WORD: function(l, w) {
return l.render_tex() + w.render_tex();
},
CHEM_FUN2u: function(f, a, b) {
return f + curlies(a) + "_" + curlies(b);
},
FUN1nb: function(f, a) {
return f + " " + curlies(a) + " ";
},
DECLh: function(f, _, a) {
return curlies(f + " " + render_curlies(a));
},
FUN2: function(f, a, b) {
return curlies(f + " " + curlies(a) + curlies(b));
},
FUN2nb: function(f, a, b) {
return f + " " + curlies(a) + curlies(b);
},
FUN2sq: function(f, a, b) {
return curlies(f + "[" + a.render_tex() + "]" + curlies(b));
},
CURLY: function(tl) {
return render_curlies(tl);
},
DOLLAR: function(tl) {
return render_dollar(tl);
},
INFIX: function(s, ll, rl) {
return curlies(render(ll) + " " + s + " " + render(rl));
},
BOX: function(bt, s) {
//CJK spacing - by libattery
var cjk = new RegExp(
"(["
+"\u1100-\u11FF\u3130-\u318F\uAC00-\uD7AF" //Korean
+"\u2E80-\u2EFF\u31C0-\u31EF\u3200-\u32FF" //Chinese
+"\u3400-\u4DBF\u4E00-\u9FBF\uF900-\uFAFF" //Chinese
+"\u3000-\u303f\u3040-\u30FF\u31F0-\u31FF\uff00-\uff9f" //Japanese
+"])(\u2005?)"
,"ug");
s = s.replace(cjk, "$1\u2005");
return curlies(bt + curlies(s));
},
BIG: function(bt, d) {
return curlies(bt + " " + d.tex_part());
},
MATRIX: function(t, m) {
var render_line = function(l) { return l.map(render).join('&'); };
var render_matrix = function(m) { return m.map(render_line).join('\\\\'); };
return curlies("\\begin{"+t+"}" + render_matrix(m) + "\\end{"+t+"}");
},
LR: function(l, r, tl) {
return "\\left" + l.tex_part() + render(tl) + "\\right" + r.tex_part();
}
});

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text/x-tex
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Storage Handle
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render.js (3 KB)

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