JsExpander: Add methods to test file/directory existence

Change-Id: Ia51b8d47299d855dd11e8bbcb05b22aea875e458
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/coreplugin/corejsextensions.cpp

@@ -87,6 +87,21 @@ QString UtilsJsExtension::absoluteFilePath(const QString &in) const
     return fi.absoluteFilePath();
 }
 
+bool UtilsJsExtension::exists(const QString &in) const
+{
+    return QFileInfo::exists(in);
+}
+
+bool UtilsJsExtension::isDirectory(const QString &in) const
+{
+    return QFileInfo(in).isDir();
+}
+
+bool UtilsJsExtension::isFile(const QString &in) const
+{
+    return QFileInfo(in).isFile();
+}
+
 QString UtilsJsExtension::preferredSuffix(const QString &mimetype) const
 {
     Utils::MimeDatabase mdb;

src/plugins/coreplugin/corejsextensions.h

@@ -58,6 +58,11 @@ public:
     Q_INVOKABLE QString path(const QString &in) const;
     Q_INVOKABLE QString absoluteFilePath(const QString &in) const;
 
+    // File checks:
+    Q_INVOKABLE bool exists(const QString &in) const;
+    Q_INVOKABLE bool isDirectory(const QString &in) const;
+    Q_INVOKABLE bool isFile(const QString &in) const;
+
     // MimeDB:
     Q_INVOKABLE QString preferredSuffix(const QString &mimetype) const;