diff --git a/NEWS.md b/NEWS.md
index 72b933d5..3bc631a8 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -25,6 +25,7 @@ Red Panda C++ Version 0.13.3
   - fix: search around option can't be disabled
   - enhancement: show a confirm dialog when search/replace around
   - enhancement: auto zoom ui when screen's zoom factor changed (windows)
+  - enhancement: parser not called when open a file, if option "clean parser symbols when hidden" is turned on.
   
 Red Panda C++ Version 0.13.2
   - fix: "delete and exit" button in the environtment / folder option page doesn't work correctly 
diff --git a/RedPandaIDE/HighlighterManager.cpp b/RedPandaIDE/HighlighterManager.cpp
index 3a27b035..3d2489a4 100644
--- a/RedPandaIDE/HighlighterManager.cpp
+++ b/RedPandaIDE/HighlighterManager.cpp
@@ -43,7 +43,7 @@ PSynHighlighter HighlighterManager::getHighlighter(const QString &filename)
                 || suffix == "CPP" || suffix =="H" || suffix == "c++"
                 || suffix == "h++") {
             return getCppHighlighter();
-        } else if (suffix == "vs" || suffix == "fs") {
+        } else if (suffix == "vs" || suffix == "fs" || suffix == "frag") {
             return getGLSLHighlighter();
         }
     }
diff --git a/RedPandaIDE/autolinkmanager.cpp b/RedPandaIDE/autolinkmanager.cpp
index c7d8c421..cff90af0 100644
--- a/RedPandaIDE/autolinkmanager.cpp
+++ b/RedPandaIDE/autolinkmanager.cpp
@@ -32,7 +32,15 @@ AutolinkManager::AutolinkManager()
 
 PAutolink AutolinkManager::getLink(const QString &header) const
 {
-    return mLinks.value(header,PAutolink());
+    PAutolink link = mLinks.value(header,PAutolink());
+    if (link)
+        return link;
+    foreach (QString key, mLinks.keys()) {
+        if (header.endsWith("/"+key, PATH_SENSITIVITY)) {
+            return mLinks.value(key);
+        }
+    }
+    return PAutolink();
 }
 
 void AutolinkManager::load()
diff --git a/RedPandaIDE/compiler/compiler.cpp b/RedPandaIDE/compiler/compiler.cpp
index 055e5857..be4fbaec 100644
--- a/RedPandaIDE/compiler/compiler.cpp
+++ b/RedPandaIDE/compiler/compiler.cpp
@@ -534,11 +534,10 @@ QString Compiler::parseFileIncludesForAutolink(
         PCppParser& parser)
 {
     QString result;
-    QString baseName = extractFileName(filename);
     if (parsedFiles.contains(filename))
         return result;
     parsedFiles.insert(filename);
-    PAutolink autolink = pAutolinkManager->getLink(baseName);
+    PAutolink autolink = pAutolinkManager->getLink(filename);
     if (autolink) {
         result += ' '+autolink->linkOption;
     }
diff --git a/RedPandaIDE/editor.cpp b/RedPandaIDE/editor.cpp
index 913e4a55..5063c7fe 100644
--- a/RedPandaIDE/editor.cpp
+++ b/RedPandaIDE/editor.cpp
@@ -94,16 +94,16 @@ Editor::Editor(QWidget *parent, const QString& filename,
   mCurrentHighlightedWord(),
   mSaving(false)
 {
+    qDebug()<<"inited1 ";
     mCurrentLineModified = false;
     mUseCppSyntax = pSettings->editor().defaultFileCpp();
     if (mFilename.isEmpty()) {
         mFilename = tr("untitled")+QString("%1").arg(getNewFileNumber());
     }
+    qDebug()<<"inited2 ";
     QFileInfo fileInfo(mFilename);
-    if (mParentPageControl!=nullptr) {
-        mParentPageControl->addTab(this,"");
-        updateCaption();
-    }
+
+    qDebug()<<"inited3 ";
 
     PSynHighlighter highlighter;
     if (!isNew) {
@@ -117,6 +117,8 @@ Editor::Editor(QWidget *parent, const QString& filename,
         highlighter=highlighterManager.getCppHighlighter();
     }
 
+    qDebug()<<"----------inited";
+
     if (highlighter) {
         setHighlighter(highlighter);
         setUseCodeFolding(true);
@@ -134,7 +136,6 @@ Editor::Editor(QWidget *parent, const QString& filename,
             && mParser && (mParser->isSystemHeaderFile(mFilename) || mParser->isProjectHeaderFile(mFilename))) {
         this->setModified(false);
         setReadOnly(true);
-        updateCaption();
     }
 
     mCompletionPopup = pMainWindow->completionPopup();
@@ -180,6 +181,10 @@ Editor::Editor(QWidget *parent, const QString& filename,
         resetBreakpoints();
     }
     mStatementColors = pMainWindow->statementColors();
+    if (mParentPageControl!=nullptr) {
+        mParentPageControl->addTab(this,"");
+        updateCaption();
+    }
 }
 
 Editor::~Editor() {
@@ -524,12 +529,6 @@ void Editor::wheelEvent(QWheelEvent *event) {
 void Editor::focusInEvent(QFocusEvent *event)
 {
     SynEdit::focusInEvent(event);
-    if (mParser) {
-        connect(mParser.get(),
-                &CppParser::onEndParsing,
-                this,
-                &SynEdit::invalidate);
-    }
     pMainWindow->updateAppTitle();
     pMainWindow->updateEditorActions();
     pMainWindow->updateStatusbarForLineCol();
@@ -540,12 +539,6 @@ void Editor::focusInEvent(QFocusEvent *event)
 void Editor::focusOutEvent(QFocusEvent *event)
 {
     SynEdit::focusOutEvent(event);
-    if (mParser) {
-        disconnect(mParser.get(),
-                &CppParser::onEndParsing,
-                this,
-                &SynEdit::invalidate);
-    }
     //pMainWindow->updateClassBrowserForEditor(nullptr);
     pMainWindow->updateStatusbarForLineCol();
     pMainWindow->updateForStatusbarModeInfo();
@@ -1195,6 +1188,41 @@ void Editor::closeEvent(QCloseEvent *)
         pMainWindow->functionTip()->hide();
 }
 
+void Editor::showEvent(QShowEvent */*event*/)
+{
+    qDebug()<<"show event";
+    if (pSettings->codeCompletion().clearWhenEditorHidden()
+            && !inProject()) {
+        initParser();
+    }
+    if (mParser) {
+        connect(mParser.get(),
+                &CppParser::onEndParsing,
+                this,
+                &SynEdit::invalidate);
+    }
+    if (pSettings->codeCompletion().clearWhenEditorHidden()
+            && !inProject()) {
+        reparse();
+    }
+    reparseTodo();
+    setHideTime(QDateTime());
+}
+
+void Editor::hideEvent(QHideEvent */*event*/)
+{
+    if (mParser) {
+        disconnect(mParser.get(),
+                &CppParser::onEndParsing,
+                this,
+                &SynEdit::invalidate);
+    }
+    if (pSettings->codeCompletion().clearWhenEditorHidden()
+            && !inProject() && mParser)
+        mParser->reset();
+    setHideTime(QDateTime::currentDateTime());
+}
+
 void Editor::copyToClipboard()
 {
     if (pSettings->editor().copySizeLimit()) {
@@ -2407,6 +2435,7 @@ void Editor::reparse()
     if (highlighter()->language() != SynHighlighterLanguage::Cpp
              && highlighter()->language() != SynHighlighterLanguage::GLSL)
         return;
+    qDebug()<<"reparse"<<mParser.get()<<mFilename<<mInProject;
     parseFile(mParser,mFilename,mInProject);
 }
 
@@ -3124,7 +3153,7 @@ QString Editor::getFileHint(const QString &s)
     return "";
 }
 
-QString Editor::getParserHint(const QStringList& expression,const QString &s, int line)
+QString Editor::getParserHint(const QStringList& expression,const QString &/*s*/, int line)
 {
     // This piece of code changes the parser database, possibly making hints and code completion invalid...
     QString result;
diff --git a/RedPandaIDE/editor.h b/RedPandaIDE/editor.h
index e2a0247f..beef612c 100644
--- a/RedPandaIDE/editor.h
+++ b/RedPandaIDE/editor.h
@@ -372,6 +372,11 @@ protected:
     void mouseReleaseEvent(QMouseEvent *event) override;
     void inputMethodEvent(QInputMethodEvent *) override;
     void closeEvent(QCloseEvent *event) override;
+
+    // QWidget interface
+protected:
+    void showEvent(QShowEvent *event) override;
+    void hideEvent(QHideEvent *event) override;
 };
 
 QString getWordAtPosition(SynEdit* editor,
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index 7eeac5a0..2ecc9c9f 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -954,8 +954,6 @@ void MainWindow::openFiles(const QStringList &files)
     auto end = finally([this] {
         this->mEditorList->endUpdate();
         mOpenningFiles = false;
-        updateEditorParser(ui->EditorTabsLeft);
-        updateEditorParser(ui->EditorTabsRight);
     });
     //Check if there is a project file in the list and open it
     for (const QString& file:files) {
@@ -5222,39 +5220,6 @@ PSymbolUsageManager &MainWindow::symbolUsageManager()
     return mSymbolUsageManager;
 }
 
-void MainWindow::updateEditorParser(QTabWidget* tabWidget) {
-    if (mOpenningFiles)
-        return;
-    Editor * editor = mEditorList->getEditor(-1,tabWidget);
-    if (pSettings->codeCompletion().clearWhenEditorHidden()) {
-        for (int i=0;i<tabWidget->count();i++) {
-            Editor * e = (Editor*)(tabWidget->widget(i));
-            if (!e->inProject()) {
-                if (e!=editor && e->parser() && !e->notParsed()) {
-                    e->parser()->reset();
-                }
-            }
-        }
-    }
-    if (editor && editor->parser() && editor->notParsed()) {
-        resetCppParser(editor->parser());
-        editor->reparse();
-    }
-}
-
-void MainWindow::updateEditorHideTime(QTabWidget* tabWidget) {
-    Editor * editor = mEditorList->getEditor(-1,tabWidget);
-    for (int i=0;i<tabWidget->count();i++) {
-        Editor * e = (Editor*)(tabWidget->widget(i));
-        if (e!=editor) {
-            if (!e->hideTime().isValid())
-                e->setHideTime(QDateTime::currentDateTime());
-        } else {
-            e->setHideTime(QDateTime());
-        }
-    }
-}
-
 void MainWindow::showHideInfosTab(QWidget *widget, bool show)
 {
     int idx = findTabIndex(ui->tabInfos,widget);
@@ -5393,26 +5358,13 @@ void MainWindow::onEditorRenamed(const QString &oldFilename, const QString &newF
 
 void MainWindow::on_EditorTabsLeft_currentChanged(int)
 {
-    Editor * editor = mEditorList->getEditor(-1,ui->EditorTabsLeft);
-    if (editor) {
-        editor->reparseTodo();
-    }
-    updateEditorParser(ui->EditorTabsLeft);
-    updateEditorHideTime(ui->EditorTabsLeft);
 }
 
 
 void MainWindow::on_EditorTabsRight_currentChanged(int)
 {
-    Editor * editor = mEditorList->getEditor(-1,ui->EditorTabsRight);
-    if (editor) {
-        editor->reparseTodo();
-    }
-    updateEditorParser(ui->EditorTabsRight);
-    updateEditorHideTime(ui->EditorTabsRight);
 }
 
-
 void MainWindow::on_tableTODO_doubleClicked(const QModelIndex &index)
 {
     PTodoItem item = mTodoModel.getItem(index);
@@ -5422,7 +5374,6 @@ void MainWindow::on_tableTODO_doubleClicked(const QModelIndex &index)
             editor->setCaretPositionAndActivate(item->lineNo,item->ch+1);
         }
     }
-
 }
 
 
diff --git a/RedPandaIDE/mainwindow.h b/RedPandaIDE/mainwindow.h
index 433567d8..ebb689ca 100644
--- a/RedPandaIDE/mainwindow.h
+++ b/RedPandaIDE/mainwindow.h
@@ -243,8 +243,6 @@ private:
     void doCompileRun(RunType runType);
     void updateProblemCaseOutput(POJProblemCase problemCase);
     void applyCurrentProblemCaseChanges();
-    void updateEditorParser(QTabWidget* tabWidget);
-    void updateEditorHideTime(QTabWidget* tabWidget);
     void showHideInfosTab(QWidget *widget, bool show);
     void showHideMessagesTab(QWidget *widget, bool show);
     void prepareTabInfosData();
diff --git a/RedPandaIDE/settingsdialog/editorcodecompletionwidget.cpp b/RedPandaIDE/settingsdialog/editorcodecompletionwidget.cpp
index eb05e37e..9e35d2a6 100644
--- a/RedPandaIDE/settingsdialog/editorcodecompletionwidget.cpp
+++ b/RedPandaIDE/settingsdialog/editorcodecompletionwidget.cpp
@@ -50,6 +50,7 @@ void EditorCodeCompletionWidget::doLoad()
     ui->chkIgnoreCases->setChecked(pSettings->codeCompletion().ignoreCase());
     ui->chkAppendFunc->setChecked(pSettings->codeCompletion().appendFunc());
     ui->chkShowCodeIns->setChecked(pSettings->codeCompletion().showCodeIns());
+    ui->chkClearWhenEditorHidden->setChecked(pSettings->codeCompletion().clearWhenEditorHidden());
 
     ui->spinMinCharRequired->setValue(pSettings->codeCompletion().minCharRequired());
 }
@@ -74,6 +75,7 @@ void EditorCodeCompletionWidget::doSave()
     pSettings->codeCompletion().setShowCodeIns(ui->chkShowCodeIns->isChecked());
     pSettings->codeCompletion().setMinCharRequired(ui->spinMinCharRequired->value());
 
+    pSettings->codeCompletion().setClearWhenEditorHidden(ui->chkClearWhenEditorHidden->isChecked());
 
     pSettings->codeCompletion().save();
 }