diff --git a/src/plugins/glsleditor/glsleditor.cpp b/src/plugins/glsleditor/glsleditor.cpp
index bd39628b52f..f7cdc003363 100644
--- a/src/plugins/glsleditor/glsleditor.cpp
+++ b/src/plugins/glsleditor/glsleditor.cpp
@@ -191,7 +191,7 @@ Core::IEditor *GLSLEditorEditable::duplicate(QWidget *parent)
 {
     GLSLTextEditorWidget *newEditor = new GLSLTextEditorWidget(parent);
     newEditor->duplicateFrom(editorWidget());
-    GLSLEditorPlugin::instance()->initializeEditor(newEditor);
+    GLSLEditorPlugin::initializeEditor(newEditor);
     return newEditor->editor();
 }
 
@@ -256,11 +256,6 @@ void GLSLTextEditorWidget::createToolBar(GLSLEditorEditable *editor)
     editor->insertExtraToolBarWidget(TextEditor::BaseTextEditor::Left, m_outlineCombo);
 }
 
-bool GLSLTextEditorWidget::event(QEvent *e)
-{
-    return BaseTextEditorWidget::event(e);
-}
-
 void GLSLTextEditorWidget::unCommentSelection()
 {
     Utils::unCommentSelection(this);
@@ -285,16 +280,19 @@ void GLSLTextEditorWidget::updateDocumentNow()
     Parser parser(doc->_engine, preprocessedCode.constData(), preprocessedCode.size(), variant);
     TranslationUnitAST *ast = parser.parse();
     if (ast != 0 || extraSelections(CodeWarningsSelection).isEmpty()) {
-        GLSLEditorPlugin *plugin = GLSLEditorPlugin::instance();
-
         Semantic sem;
         Scope *globalScope = engine->newNamespace();
         doc->_globalScope = globalScope;
-        sem.translationUnit(plugin->shaderInit(variant)->ast, globalScope, plugin->shaderInit(variant)->engine);
-        if (variant & Lexer::Variant_VertexShader)
-            sem.translationUnit(plugin->vertexShaderInit(variant)->ast, globalScope, plugin->vertexShaderInit(variant)->engine);
-        if (variant & Lexer::Variant_FragmentShader)
-            sem.translationUnit(plugin->fragmentShaderInit(variant)->ast, globalScope, plugin->fragmentShaderInit(variant)->engine);
+        const GLSLEditorPlugin::InitFile *file = GLSLEditorPlugin::shaderInit(variant);
+        sem.translationUnit(file->ast, globalScope, file->engine);
+        if (variant & Lexer::Variant_VertexShader) {
+            file = GLSLEditorPlugin::vertexShaderInit(variant);
+            sem.translationUnit(file->ast, globalScope, file->engine);
+        }
+        if (variant & Lexer::Variant_FragmentShader) {
+            file = GLSLEditorPlugin::fragmentShaderInit(variant);
+            sem.translationUnit(file->ast, globalScope, file->engine);
+        }
         sem.translationUnit(ast, globalScope, engine);
 
         CreateRanges createRanges(document(), doc);
@@ -371,11 +369,6 @@ int GLSLTextEditorWidget::languageVariant(const QString &type)
     return variant;
 }
 
-Document::Ptr GLSLTextEditorWidget::glslDocument() const
-{
-    return m_glslDocument;
-}
-
 TextEditor::IAssistInterface *GLSLTextEditorWidget::createAssistInterface(
     TextEditor::AssistKind kind,
     TextEditor::AssistReason reason) const
@@ -386,6 +379,6 @@ TextEditor::IAssistInterface *GLSLTextEditorWidget::createAssistInterface(
                                                  editor()->document()->filePath(),
                                                  reason,
                                                  mimeType(),
-                                                 glslDocument());
+                                                 m_glslDocument);
     return BaseTextEditorWidget::createAssistInterface(kind, reason);
 }
diff --git a/src/plugins/glsleditor/glsleditor.h b/src/plugins/glsleditor/glsleditor.h
index 269b86eb217..1362a64e3d6 100644
--- a/src/plugins/glsleditor/glsleditor.h
+++ b/src/plugins/glsleditor/glsleditor.h
@@ -46,8 +46,6 @@ class TranslationUnitAST;
 class Scope;
 } // namespace GLSL
 
-namespace Core { class ICore; }
-
 namespace GLSLEditor {
 namespace Internal {
 
@@ -100,8 +98,6 @@ public:
 
     static int languageVariant(const QString &mimeType);
 
-    Document::Ptr glslDocument() const;
-
     TextEditor::IAssistInterface *createAssistInterface(TextEditor::AssistKind assistKind,
                                                         TextEditor::AssistReason reason) const;
 
@@ -110,7 +106,6 @@ private slots:
     void updateDocumentNow();
 
 protected:
-    bool event(QEvent *e);
     TextEditor::BaseTextEditor *createEditor();
     void createToolBar(Internal::GLSLEditorEditable *editable);
 
diff --git a/src/plugins/glsleditor/glsleditorfactory.cpp b/src/plugins/glsleditor/glsleditorfactory.cpp
index e163a3ad060..5afdfe65cbe 100644
--- a/src/plugins/glsleditor/glsleditorfactory.cpp
+++ b/src/plugins/glsleditor/glsleditorfactory.cpp
@@ -59,7 +59,7 @@ GLSLEditorFactory::GLSLEditorFactory(QObject *parent)
 Core::IEditor *GLSLEditorFactory::createEditor(QWidget *parent)
 {
     GLSLTextEditorWidget *rc = new GLSLTextEditorWidget(parent);
-    GLSLEditorPlugin::instance()->initializeEditor(rc);
+    GLSLEditorPlugin::initializeEditor(rc);
     return rc->editor();
 }
 
diff --git a/src/plugins/glsleditor/glsleditorplugin.cpp b/src/plugins/glsleditor/glsleditorplugin.cpp
index e8a4e814e23..d1abd04b043 100644
--- a/src/plugins/glsleditor/glsleditorplugin.cpp
+++ b/src/plugins/glsleditor/glsleditorplugin.cpp
@@ -72,36 +72,61 @@ using namespace TextEditor;
 namespace GLSLEditor {
 namespace Internal {
 
-GLSLEditorPlugin *GLSLEditorPlugin::m_instance = 0;
+class GLSLEditorPluginPrivate
+{
+public:
+    GLSLEditorPluginPrivate() :
+        m_editor(0),
+        m_actionHandler(0),
+        m_glsl_120_frag(0),
+        m_glsl_120_vert(0),
+        m_glsl_120_common(0),
+        m_glsl_es_100_frag(0),
+        m_glsl_es_100_vert(0),
+        m_glsl_es_100_common(0)
+    {}
+
+    ~GLSLEditorPluginPrivate()
+    {
+        delete m_actionHandler;
+        delete m_glsl_120_frag;
+        delete m_glsl_120_vert;
+        delete m_glsl_120_common;
+        delete m_glsl_es_100_frag;
+        delete m_glsl_es_100_vert;
+        delete m_glsl_es_100_common;
+    }
+
+    GLSLEditorFactory *m_editor;
+    TextEditor::TextEditorActionHandler *m_actionHandler;
+    QPointer<TextEditor::ITextEditor> m_currentTextEditable;
+
+    GLSLEditorPlugin::InitFile *m_glsl_120_frag;
+    GLSLEditorPlugin::InitFile *m_glsl_120_vert;
+    GLSLEditorPlugin::InitFile *m_glsl_120_common;
+    GLSLEditorPlugin::InitFile *m_glsl_es_100_frag;
+    GLSLEditorPlugin::InitFile *m_glsl_es_100_vert;
+    GLSLEditorPlugin::InitFile *m_glsl_es_100_common;
+};
+
+static GLSLEditorPluginPrivate *dd = 0;
+static GLSLEditorPlugin *m_instance = 0;
 
 GLSLEditorPlugin::InitFile::~InitFile()
 {
     delete engine;
 }
 
-GLSLEditorPlugin::GLSLEditorPlugin() :
-    m_editor(0),
-    m_actionHandler(0),
-    m_glsl_120_frag(0),
-    m_glsl_120_vert(0),
-    m_glsl_120_common(0),
-    m_glsl_es_100_frag(0),
-    m_glsl_es_100_vert(0),
-    m_glsl_es_100_common(0)
+GLSLEditorPlugin::GLSLEditorPlugin()
 {
     m_instance = this;
+    dd = new GLSLEditorPluginPrivate;
 }
 
 GLSLEditorPlugin::~GLSLEditorPlugin()
 {
-    removeObject(m_editor);
-    delete m_actionHandler;
-    delete m_glsl_120_frag;
-    delete m_glsl_120_vert;
-    delete m_glsl_120_common;
-    delete m_glsl_es_100_frag;
-    delete m_glsl_es_100_vert;
-    delete m_glsl_es_100_common;
+    removeObject(dd->m_editor);
+    delete dd;
     m_instance = 0;
 }
 
@@ -115,16 +140,16 @@ bool GLSLEditorPlugin::initialize(const QStringList & /*arguments*/, QString *er
 
     addAutoReleasedObject(new GLSLHoverHandler(this));
 
-    m_editor = new GLSLEditorFactory(this);
-    addObject(m_editor);
+    dd->m_editor = new GLSLEditorFactory(this);
+    addObject(dd->m_editor);
 
     addAutoReleasedObject(new GLSLCompletionAssistProvider);
 
-    m_actionHandler = new TextEditorActionHandler(Constants::C_GLSLEDITOR_ID,
+    dd->m_actionHandler = new TextEditorActionHandler(Constants::C_GLSLEDITOR_ID,
                                                               TextEditorActionHandler::Format
                                                               | TextEditorActionHandler::UnCommentSelection
                                                               | TextEditorActionHandler::UnCollapseAll);
-    m_actionHandler->initializeActions();
+    dd->m_actionHandler->initializeActions();
 
     ActionContainer *contextMenu = ActionManager::createMenu(GLSLEditor::Constants::M_CONTEXT);
     ActionContainer *glslToolsMenu = ActionManager::createMenu(Id(Constants::M_TOOLS_GLSL));
@@ -219,20 +244,11 @@ ExtensionSystem::IPlugin::ShutdownFlag GLSLEditorPlugin::aboutToShutdown()
 void GLSLEditorPlugin::initializeEditor(GLSLTextEditorWidget *editor)
 {
     QTC_CHECK(m_instance);
-    m_actionHandler->setupActions(editor);
+    dd->m_actionHandler->setupActions(editor);
     TextEditorSettings::instance()->initializeEditor(editor);
 }
 
-GLSLEditorPlugin::InitFile *GLSLEditorPlugin::getInitFile(const QString &fileName, InitFile **initFile) const
-{
-    if (*initFile)
-        return *initFile;
-    *initFile = new GLSLEditorPlugin::InitFile;
-    parseGlslFile(fileName, *initFile);
-    return *initFile;
-}
-
-QByteArray GLSLEditorPlugin::glslFile(const QString &fileName) const
+static QByteArray glslFile(const QString &fileName)
 {
     QFile file(ICore::resourcePath() + QLatin1String("/glsl/") + fileName);
     if (file.open(QFile::ReadOnly))
@@ -240,7 +256,7 @@ QByteArray GLSLEditorPlugin::glslFile(const QString &fileName) const
     return QByteArray();
 }
 
-void GLSLEditorPlugin::parseGlslFile(const QString &fileName, InitFile *initFile) const
+static void parseGlslFile(const QString &fileName, GLSLEditorPlugin::InitFile *initFile)
 {
     // Parse the builtins for any langugage variant so we can use all keywords.
     const int variant = GLSL::Lexer::Variant_All;
@@ -251,28 +267,37 @@ void GLSLEditorPlugin::parseGlslFile(const QString &fileName, InitFile *initFile
     initFile->ast = parser.parse();
 }
 
-const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::fragmentShaderInit(int variant) const
+static GLSLEditorPlugin::InitFile *getInitFile(const char *fileName, GLSLEditorPlugin::InitFile **initFile)
 {
-    if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return getInitFile(QLatin1String("glsl_120.frag"), &m_glsl_120_frag);
-    else
-        return getInitFile(QLatin1String("glsl_es_100.frag"), &m_glsl_es_100_frag);
+    if (*initFile)
+        return *initFile;
+    *initFile = new GLSLEditorPlugin::InitFile;
+    parseGlslFile(QLatin1String(fileName), *initFile);
+    return *initFile;
 }
 
-const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::vertexShaderInit(int variant) const
+const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::fragmentShaderInit(int variant)
 {
     if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return getInitFile(QLatin1String("glsl_120.vert"), &m_glsl_120_vert);
+        return getInitFile("glsl_120.frag", &dd->m_glsl_120_frag);
     else
-        return getInitFile(QLatin1String("glsl_es_100.vert"), &m_glsl_es_100_vert);
+        return getInitFile("glsl_es_100.frag", &dd->m_glsl_es_100_frag);
 }
 
-const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::shaderInit(int variant) const
+const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::vertexShaderInit(int variant)
 {
     if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return getInitFile(QLatin1String("glsl_120_common.glsl"), &m_glsl_120_common);
+        return getInitFile("glsl_120.vert", &dd->m_glsl_120_vert);
     else
-        return getInitFile(QLatin1String("glsl_es_100_common.glsl"), &m_glsl_es_100_common);
+        return getInitFile("glsl_es_100.vert", &dd->m_glsl_es_100_vert);
+}
+
+const GLSLEditorPlugin::InitFile *GLSLEditorPlugin::shaderInit(int variant)
+{
+    if (variant & GLSL::Lexer::Variant_GLSL_120)
+        return getInitFile("glsl_120_common.glsl", &dd->m_glsl_120_common);
+    else
+        return getInitFile("glsl_es_100_common.glsl", &dd->m_glsl_es_100_common);
 }
 
 } // namespace Internal
diff --git a/src/plugins/glsleditor/glsleditorplugin.h b/src/plugins/glsleditor/glsleditorplugin.h
index 6d97bb6ca01..882f01800af 100644
--- a/src/plugins/glsleditor/glsleditorplugin.h
+++ b/src/plugins/glsleditor/glsleditorplugin.h
@@ -31,29 +31,11 @@
 #define GLSLEDITORPLUGIN_H
 
 #include <extensionsystem/iplugin.h>
-#include <coreplugin/icontext.h>
-#include <coreplugin/id.h>
 #include <glsl/glsl.h>
 
-#include <QPointer>
-
-QT_FORWARD_DECLARE_CLASS(QAction)
-
-namespace TextEditor {
-class TextEditorActionHandler;
-class ITextEditor;
-} // namespace TextEditor
-
-namespace Core {
-class Command;
-class ActionContainer;
-class ActionManager;
-} // namespace Core
-
 namespace GLSLEditor {
 namespace Internal {
 
-class GLSLEditorFactory;
 class GLSLTextEditorWidget;
 
 class GLSLEditorPlugin : public ExtensionSystem::IPlugin
@@ -70,9 +52,7 @@ public:
     void extensionsInitialized();
     ShutdownFlag aboutToShutdown();
 
-    static GLSLEditorPlugin *instance() { return m_instance; }
-
-    void initializeEditor(GLSLTextEditorWidget *editor);
+    static void initializeEditor(GLSLTextEditorWidget *editor);
 
     struct InitFile
     {
@@ -86,28 +66,9 @@ public:
         GLSL::TranslationUnitAST *ast;
     };
 
-    const InitFile *fragmentShaderInit(int variant) const;
-    const InitFile *vertexShaderInit(int variant) const;
-    const InitFile *shaderInit(int variant) const;
-
-private:
-    QByteArray glslFile(const QString &fileName) const;
-    InitFile *getInitFile(const QString &fileName, InitFile **initFile) const;
-    void parseGlslFile(const QString &fileName, InitFile *initFile) const;
-
-    static GLSLEditorPlugin *m_instance;
-
-    GLSLEditorFactory *m_editor;
-    TextEditor::TextEditorActionHandler *m_actionHandler;
-
-    QPointer<TextEditor::ITextEditor> m_currentTextEditable;
-
-    mutable InitFile *m_glsl_120_frag;
-    mutable InitFile *m_glsl_120_vert;
-    mutable InitFile *m_glsl_120_common;
-    mutable InitFile *m_glsl_es_100_frag;
-    mutable InitFile *m_glsl_es_100_vert;
-    mutable InitFile *m_glsl_es_100_common;
+    static const InitFile *fragmentShaderInit(int variant);
+    static const InitFile *vertexShaderInit(int variant);
+    static const InitFile *shaderInit(int variant);
 };
 
 } // namespace Internal