Improve syntax highlight switching on AST and Opt

examples/d/default.d

@@ -1,4 +1,4 @@
 // Type your code here, or load an example.
 int square(int num) {
-  return num * num;
+    return num * num;
 }

examples/go/default.go

@@ -3,7 +3,7 @@
 package main
 
 func Square(x int) int {
-  return x * x
+    return x * x
 }
 
 func main() {}

examples/llvm/default.ll

@@ -1,4 +1,4 @@
 define i32 @square(i32) local_unnamed_addr #0 {
-  %2 = mul nsw i32 %0, %0
-  ret i32 %2
+    %2 = mul nsw i32 %0, %0
+    ret i32 %2
 }

examples/pascal/default.pas

@@ -10,7 +10,7 @@ implementation
 
 function Square(const num: Integer): Integer;
 begin
-  Square := num * num;
+    Square := num * num;
 end;
 
 end.

examples/rust/default.rs

@@ -1,4 +1,4 @@
 // Type your code here, or load an example.
 pub fn square(num: i32) -> i32 {
-  num * num
+    num * num
 }

static/ast-view.js

@@ -37,7 +37,7 @@ function Ast(hub, container, state) {
     this.astEditor = monaco.editor.create(this.domRoot.find(".monaco-placeholder")[0], {
         value: "",
         scrollBeyondLastLine: false,
-        language: 'text',
+        language: 'plaintext',
         readOnly: true,
         glyphMargin: true,
         fontFamily: 'Consolas, "Liberation Mono", Courier, monospace',
@@ -94,17 +94,23 @@ Ast.prototype.resize = function () {
 };
 
 Ast.prototype.onCompileResult = function (id, compiler, result, lang) {
-    if (this._compilerid === id) {
-        if (result.hasAstOutput) {
-            this.showAstResults(result.astOutput);
-        }
-        else {
-            this.showAstResults("<No output>");
-        }
-        if (lang && lang.monaco) {
-            monaco.editor.setModelLanguage(this.astEditor.getModel(), lang.monaco);
-        }
+    if (this._compilerid !== id) return;
+
+    if (result.hasAstOutput) {
+        this.showAstResults(result.astOutput);
     }
+    else {
+        this.showAstResults("<No output>");
+    }
+
+    if (lang && lang.monaco && this.getCurrentEditorLanguage() !== lang.monaco) {
+        monaco.editor.setModelLanguage(this.astEditor.getModel(), lang.monaco);
+    }
+};
+
+// Monaco language id of the current editor
+Ast.prototype.getCurrentEditorLanguage = function () {
+    return this.astEditor.getModel().getModeId();
 };
 
 Ast.prototype.setTitle = function () {

static/gccdump-view.js

@@ -194,7 +194,7 @@ GccDump.prototype.onCompileResult = function (id, compiler, result) {
     if (result.hasGccDumpOutput && result.gccDumpOutput.syntaxHighlight) {
         monaco.editor.setModelLanguage(this.gccDumpEditor.getModel(), 'gccdump-rtl-gimple');
     } else {
-        monaco.editor.setModelLanguage(this.gccDumpEditor.getModel(), 'text');
+        monaco.editor.setModelLanguage(this.gccDumpEditor.getModel(), 'plaintext');
     }
 
     if (result.hasGccDumpOutput) {

static/opt-view.js

@@ -43,7 +43,7 @@ function Opt(hub, container, state) {
     this.optEditor = monaco.editor.create(this.domRoot.find(".monaco-placeholder")[0], {
         value: this.code,
         scrollBeyondLastLine: false,
-        language: 'text',
+        language: 'plaintext',
         readOnly: true,
         glyphMargin: true,
         quickSuggestions: false,
@@ -101,12 +101,18 @@ Opt.prototype.initCallbacks = function () {
 };
 
 Opt.prototype.onCompileResult = function (id, compiler, result, lang) {
-    if (result.hasOptOutput && this._compilerid === id) {
+    if (this._compilerid !== id) return;
+    if (result.hasOptOutput) {
         this.showOptResults(result.optOutput);
-        if (lang && lang.monaco) {
-            monaco.editor.setModelLanguage(this.optEditor.getModel(), lang.monaco);
-        }
     }
+    if (lang && lang.monaco && this.getCurrentEditorLanguage() !== lang.monaco) {
+        monaco.editor.setModelLanguage(this.optEditor.getModel(), lang.monaco);
+    }
+};
+
+// Monaco language id of the current editor
+Opt.prototype.getCurrentEditorLanguage = function () {
+    return this.optEditor.getModel().getModeId();
 };
 
 Opt.prototype.setTitle = function () {