Move editor.onChange from compiler to app

src/app.js

@@ -436,6 +436,27 @@ var run = function () {
 
   var renderer = new Renderer(editor, executionContext.web3(), updateFiles, udapp, executionContext, formalVerification.event, compiler.event); // eslint-disable-line
 
+  var previousInput = '';
+  var compileTimeout = null;
+
+  function editorOnChange () {
+    var input = editor.getValue();
+    if (input === '') {
+      editor.setCacheFileContent('');
+      return;
+    }
+    if (input === previousInput) {
+      return;
+    }
+    previousInput = input;
+    if (compileTimeout) {
+      window.clearTimeout(compileTimeout);
+    }
+    compileTimeout = window.setTimeout(compiler.compile, 300);
+  }
+
+  editor.onChangeSetup(editorOnChange);
+
   $('#compile').click(function () {
     compiler.compile();
   });
@@ -453,6 +474,7 @@ var run = function () {
   });
 
   compiler.event.register('compilerLoaded', this, function (version) {
+    previousInput = '';
     setVersionText(version);
     compiler.compile();
     initWithQueryParams();

src/app/compiler.js

@@ -17,31 +17,9 @@ function Compiler (editor, queryParams, handleGithubCall, updateFiles) {
   var compileJSON;
   var compilerAcceptsMultipleFiles;
 
-  var previousInput = '';
-
   var cachedRemoteFiles = {};
   var worker = null;
 
-  var compileTimeout = null;
-
-  function onChange () {
-    var input = editor.getValue();
-    if (input === '') {
-      editor.setCacheFileContent('');
-      return;
-    }
-    if (input === previousInput) {
-      return;
-    }
-    previousInput = input;
-    if (compileTimeout) {
-      window.clearTimeout(compileTimeout);
-    }
-    compileTimeout = window.setTimeout(compile, 300);
-  }
-
-  editor.onChangeSetup(onChange);
-
   var compile = function (missingInputs) {
     editor.clearAnnotations();
     self.event.trigger('compilationStarted', []);
@@ -67,7 +45,6 @@ function Compiler (editor, queryParams, handleGithubCall, updateFiles) {
   this.setCompileJSON = setCompileJSON; // this is exposed for testing
 
   function onCompilerLoaded (version) {
-    previousInput = '';
     self.event.trigger('compilerLoaded', [version]);
   }