[main] prettify SVG output

Fixes #11

lib/main.js

@@ -20,7 +20,7 @@ const speech = require('speech-rule-engine');
 // speakText:                      // string with spoken annotation
 
 
-const main = function(data, callback) {
+const main = function (data, callback) {
     let speechConfig = {
         semantics: true,
         domain: data.speakRuleset || 'mathspeak',
@@ -34,12 +34,12 @@ const main = function(data, callback) {
     data.mmlNode = true;
     data.mml = true;
 
-    mathjax.typeset(data, function(result, input) {
+    mathjax.typeset(data, function (result, input) {
         postprocessor(speechConfig, result, input, callback);
     })
 };
 
-const postprocessor = function(config, result, input, callback) {
+const postprocessor = function (config, result, input, callback) {
     if (result.error) throw result.error;
     if (!result.mml) throw new Error('No MathML found. Please check the mathjax-node configuration');
     if (!result.svgNode && !result.htmlNode && !result.mmlNode) throw new Error('No suitable output found. Please check the mathjax-node configuration');
@@ -62,6 +62,8 @@ const postprocessor = function(config, result, input, callback) {
         // update serialization
         // HACK add lost xlink namespaces TODO file jsdom bug
         if (result.svg) result.svg = result.svgNode.outerHTML
+            .replace(/><([^/])/g, ">\n<$1")
+            .replace(/(<\/[a-z]*>)(?=<\/)/g, "$1\n")
             .replace(/(<(?:use|image) [^>]*)(href=)/g, ' $1xlink:$2');
     }
     if (result.htmlNode) {
@@ -77,7 +79,7 @@ const postprocessor = function(config, result, input, callback) {
     callback(result, input);
 }
 
-const preprocessor = function(data, callback) {
+const preprocessor = function (data, callback) {
     // setup SRE
     let speechConfig = {
         semantics: true,
@@ -100,7 +102,7 @@ const preprocessor = function(data, callback) {
             format: data.format,
             mml: true
         };
-        mathjax.typeset(newdata, function(result) {
+        mathjax.typeset(newdata, function (result) {
             if (result.error) throw result.error;
             data.math = speech.toEnriched(result.mml).toString();
             data.format = 'MathML';
@@ -113,12 +115,12 @@ const preprocessor = function(data, callback) {
 
 exports.start = mathjax.start;
 exports.config = mathjax.config;
-exports.typeset = function(data, callback) {
+exports.typeset = function (data, callback) {
     if (data.svg) data.svgNode = true;
     if (data.html) data.htmlNode = true;
     if (data.mml) data.mmlNode = true;
     if (data.enrich) {
-        preprocessor(data, function(result) {
+        preprocessor(data, function (result) {
             main(result, callback);
         })
     } else main(data, callback);

test/base-svg-prettify.js

@@ -0,0 +1,10 @@
+var tape = require('tape');
+var mjsre = require('../lib/main.js').typeset;
+
+tape('Base: SVG prettify', function(t) {
+  t.plan(1);
+  var input = 'x';
+  mjsre({math: input, format: "TeX", svg: true,speakText: true},function(result){
+    t.ok(result.svg.indexOf('\n') !== -1, 'SVG string contains linebreaks');
+  });
+});