Detect the type of the shader.

src/plugins/glsleditor/GLSLEditor.mimetypes.xml

 <?xml version="1.0"?>
 <mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>
+
     <mime-type type="application/x-glsl">
         <alias type="text/x-glsl"/>
         <sub-class-of type="text/plain"/>
-        <comment>GLSL file</comment>
+        <comment>GLSL Shader file</comment>
         <glob pattern="*.glsl"/>
         <glob pattern="*.shader"/>
+    </mime-type>
+
+    <mime-type type="text/x-glsl-frag">
+        <sub-class-of type="text/x-glsl"/>
+        <comment>GLSL Fragment Shader file</comment>
         <glob pattern="*.frag"/>
-        <glob pattern="*.vert"/>
         <glob pattern="*.fsh"/>
+    </mime-type>
+
+    <mime-type type="text/x-glsl-vert">
+        <sub-class-of type="text/x-glsl"/>
+        <comment>GLSL Fragment Shader file</comment>
+        <glob pattern="*.vert"/>
         <glob pattern="*.vsh"/>
     </mime-type>
+
 </mime-info>

src/plugins/glsleditor/glsleditor.cpp

@@ -276,8 +276,10 @@ void GLSLTextEditor::updateDocumentNow()
     Semantic sem;
     Scope *globalScope = engine.newNamespace();
     sem.translationUnit(plugin->shaderInit()->ast, globalScope, plugin->shaderInit()->engine);
-    sem.translationUnit(plugin->vertexShaderInit()->ast, globalScope, plugin->vertexShaderInit()->engine);
-    sem.translationUnit(plugin->fragmentShaderInit()->ast, globalScope, plugin->fragmentShaderInit()->engine);
+    if (isVertexShader())
+        sem.translationUnit(plugin->vertexShaderInit()->ast, globalScope, plugin->vertexShaderInit()->engine);
+    if (isFragmentShader())
+        sem.translationUnit(plugin->fragmentShaderInit()->ast, globalScope, plugin->fragmentShaderInit()->engine);
     sem.translationUnit(ast, globalScope, &engine);
 
     QTextCharFormat errorFormat;
@@ -314,3 +316,13 @@ void GLSLTextEditor::updateDocumentNow()
     // refresh the identifiers.
     m_identifiers = engine.identifiers();
 }
+
+bool GLSLTextEditor::isVertexShader() const
+{
+    return mimeType() == QLatin1String("text/x-glsl-vert");
+}
+
+bool GLSLTextEditor::isFragmentShader() const
+{
+    return mimeType() == QLatin1String("text/x-glsl-frag");
+}

src/plugins/glsleditor/glsleditor.h

@@ -65,6 +65,9 @@ public:
 
     QSet<QString> identifiers() const;
 
+    bool isVertexShader() const;
+    bool isFragmentShader() const;
+
 public slots:
     virtual void setFontSettings(const TextEditor::FontSettings &);