[ADD] : add a file test entry in the file system interface

Author: aiekick

ImGuiFileDialog.cpp

@@ -437,6 +437,9 @@ class FileSystemStd : public IGFD::IFileSystem {
         }
         return false;  // this is not a directory!
     }
+    bool IsFileExist(const std::string& vName) override {
+        return fs::is_regular_file(vName);
+    }
     bool CreateDirectoryIfNotExist(const std::string& vName) override {
         bool res = false;
         if (!vName.empty()) {
@@ -583,6 +586,14 @@ class FileSystemDirent : public IGFD::IFileSystem {
         }
         return bExists;
     }
+    bool IsFileExist(const std::string& vName) override {
+        std::ifstream docFile(vName, std::ios::in);
+        if (docFile.is_open()) {
+            docFile.close();
+            return true;
+        }
+        return false;
+    }
     bool CreateDirectoryIfNotExist(const std::string& vName) override {
         bool res = false;
         if (!vName.empty()) {
@@ -2295,15 +2306,6 @@ void IGFD::FileManager::SetCurrentPath(const std::string& vCurrentPath) {
         m_CurrentPath = vCurrentPath;
 }
 
-bool IGFD::FileManager::IsFileExist(const std::string& vFile) {
-    std::ifstream docFile(vFile, std::ios::in);
-    if (docFile.is_open()) {
-        docFile.close();
-        return true;
-    }
-    return false;
-}
-
 void IGFD::FileManager::SetDefaultFileName(const std::string& vFileName) {
     dLGDefaultFileName = vFileName;
     IGFD::Utils::SetBuffer(fileNameBuffer, MAX_FILE_DIALOG_NAME_BUFFER, vFileName);
@@ -4694,7 +4696,7 @@ bool IGFD::FileDialog::m_Confirm_Or_OpenOverWriteFileDialog_IfNeeded(bool vLastA
         (m_FileDialogInternal.dLGflags & ImGuiFileDialogFlags_ConfirmOverwrite)) {
         if (m_FileDialogInternal.isOk)  // catched only one time
         {
-            if (!m_FileDialogInternal.fileManager.IsFileExist(GetFilePathName()))  // not existing => quit dialog
+            if (!m_FileDialogInternal.fileManager.GetFileSystemInstance()->IsFileExist(GetFilePathName()))  // not existing => quit dialog
             {
                 m_QuitFrame();
                 return true;

ImGuiFileDialog.h

@@ -1607,13 +1607,22 @@ class IGFD_API FileInfos {
 
 class IFileSystem {
 public:
-    virtual bool IsDirectoryCanBeOpened(const std::string& vName)                       = 0;
-    virtual bool IsDirectoryExist(const std::string& vName)                             = 0;
-    virtual bool CreateDirectoryIfNotExist(const std::string& vName)                    = 0;
+    // say if a directory can be openened or for any reason locked
+    virtual bool IsDirectoryCanBeOpened(const std::string& vName) = 0;
+    // say if a directory exist
+    virtual bool IsDirectoryExist(const std::string& vName) = 0;
+    // say if a file exist
+    virtual bool IsFileExist(const std::string& vName) = 0;
+    // say if a directory was created, return false if vName is invalid or alreayd exist
+    virtual bool CreateDirectoryIfNotExist(const std::string& vName) = 0;
+    // extract the component of a file apth name, like path, name, ext
     virtual IGFD::Utils::PathStruct ParsePathFileName(const std::string& vPathFileName) = 0;
-    virtual std::vector<IGFD::FileInfos> ScanDirectory(const std::string& vPath)        = 0;
-    virtual bool IsDirectory(const std::string& vFilePathName)                          = 0;
-    virtual std::vector<std::string> GetDrivesList()                                    = 0;
+    // will return a list of files inside a path
+    virtual std::vector<IGFD::FileInfos> ScanDirectory(const std::string& vPath) = 0;
+    // say if the path is well a directory
+    virtual bool IsDirectory(const std::string& vFilePathName) = 0;
+    // return a drive list on windows, bu can be used on android or linux for give to the suer a list of root dir
+    virtual std::vector<std::string> GetDrivesList() = 0;
 };
 
 #pragma endregion
@@ -1739,7 +1748,6 @@ class IGFD_API FileManager {
     bool SetPathOnParentDirectoryIfAny();                                  // compose paht on parent directory
     std::string GetCurrentPath();                                          // get the current path
     void SetCurrentPath(const std::string& vCurrentPath);                  // set the current path
-    static bool IsFileExist(const std::string& vFile);
     void SetDefaultFileName(const std::string& vFileName);
     bool SelectDirectory(const std::shared_ptr<FileInfos>& vInfos);  // enter directory
     void SelectFileName(const FileDialogInternal& vFileDialogInternal,