better lexer name handling

documentmanager.cpp

@@ -25,7 +25,7 @@ int DocumentManager::createNewDocument()
     doc.filePath = QString();
     doc.content = QString();
     doc.encoding = "UTF-8";
-    doc.language = "Plain Text";
+    doc.language = QString();
     doc.modified = false;
     doc.untitled = true;
 
@@ -171,7 +171,7 @@ QString DocumentManager::getDocumentLanguage(int docId) const
     if (m_documents.contains(docId)) {
         return m_documents[docId].language;
     }
-    return "Plain Text";
+    return QString();
 }
 
 bool DocumentManager::isDocumentModified(int docId) const
@@ -247,29 +247,51 @@ QString DocumentManager::generateUntitledName()
 QString DocumentManager::detectLanguageFromExtension(const QString &filePath)
 {
     QFileInfo fileInfo(filePath);
-    QString extension = fileInfo.suffix().toLower();
-    
-    if (extension == "cpp" || extension == "cxx" || extension == "cc" || extension == "c++") {
-        return "C++";
-    } else if (extension == "c") {
-        return "C";
-    } else if (extension == "h" || extension == "hpp" || extension == "hxx") {
-        return "C/C++ Header";
-    } else if (extension == "py") {
-        return "Python";
-    } else if (extension == "js") {
-        return "JavaScript";
-    } else if (extension == "html" || extension == "htm") {
-        return "HTML";
-    } else if (extension == "css") {
-        return "CSS";
-    } else if (extension == "xml") {
-        return "XML";
-    } else if (extension == "json") {
-        return "JSON";
-    } else if (extension == "txt") {
-        return "Plain Text";
-    } else {
-        return "Plain Text";
+    const QString fileName = fileInfo.fileName();
+    const QString extension = fileInfo.suffix().toLower();
+
+    if (fileName.compare(QStringLiteral("CMakeLists.txt"), Qt::CaseInsensitive) == 0) {
+        return QStringLiteral("cmake");
     }
-}
+
+    if (extension == QStringLiteral("cpp") || extension == QStringLiteral("cxx") ||
+        extension == QStringLiteral("cc") || extension == QStringLiteral("c++") ||
+        extension == QStringLiteral("c") || extension == QStringLiteral("h") ||
+        extension == QStringLiteral("hpp") || extension == QStringLiteral("hxx")) {
+        return QStringLiteral("cpp");
+    }
+
+    if (extension == QStringLiteral("py")) {
+        return QStringLiteral("python");
+    }
+
+    if (extension == QStringLiteral("html") || extension == QStringLiteral("htm")) {
+        return QStringLiteral("hypertext");
+    }
+
+    if (extension == QStringLiteral("xml") || extension == QStringLiteral("xsd") || extension == QStringLiteral("xsl")) {
+        return QStringLiteral("xml");
+    }
+
+    if (extension == QStringLiteral("json")) {
+        return QStringLiteral("json");
+    }
+
+    if (extension == QStringLiteral("css")) {
+        return QStringLiteral("css");
+    }
+
+    if (extension == QStringLiteral("cmake")) {
+        return QStringLiteral("cmake");
+    }
+
+    if (extension == QStringLiteral("yaml")) {
+        return QStringLiteral("yaml");
+    }
+
+    if (extension == QStringLiteral("ps1") || extension == QStringLiteral("psm1") || extension == QStringLiteral("psd1")) {
+        return QStringLiteral("powershell");
+    }
+
+    return QString();
+}