Basic saving and loading system

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserWindows.cs

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+#if UNITY_STANDALONE_WIN
+
+using System;
+using System.IO;
+using System.Windows.Forms;
+using System.Runtime.InteropServices;
+using Ookii.Dialogs;
+
+namespace SFB {
+    // For fullscreen support
+    // - WindowWrapper class and GetActiveWindow() are required for modal file dialog.
+    // - "PlayerSettings/Visible In Background" should be enabled, otherwise when file dialog opened app window minimizes automatically.
+
+    public class WindowWrapper : IWin32Window {
+        private IntPtr _hwnd;
+        public WindowWrapper(IntPtr handle) { _hwnd = handle; }
+        public IntPtr Handle { get { return _hwnd; } }
+    }
+
+    public class StandaloneFileBrowserWindows : IStandaloneFileBrowser {
+        [DllImport("user32.dll")]
+        private static extern IntPtr GetActiveWindow();
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var fd = new VistaOpenFileDialog();
+            fd.Title = title;
+            if (extensions != null) {
+                fd.Filter = GetFilterFromFileExtensionList(extensions);
+                fd.FilterIndex = 1;
+            }
+            else {
+                fd.Filter = string.Empty;
+            }
+            fd.Multiselect = multiselect;
+            if (!string.IsNullOrEmpty(directory)) {
+                fd.FileName = GetDirectoryPath(directory);
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filenames = res == DialogResult.OK ? fd.FileNames : new string[0];
+            fd.Dispose();
+            return filenames;
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFilePanel(title, directory, extensions, multiselect));
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var fd = new VistaFolderBrowserDialog();
+            fd.Description = title;
+            if (!string.IsNullOrEmpty(directory)) {
+                fd.SelectedPath = GetDirectoryPath(directory);
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filenames = res == DialogResult.OK ? new []{ fd.SelectedPath } : new string[0];
+            fd.Dispose();
+            return filenames;
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            cb.Invoke(OpenFolderPanel(title, directory, multiselect));
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            var fd = new VistaSaveFileDialog();
+            fd.Title = title;
+
+            var finalFilename = "";
+
+            if (!string.IsNullOrEmpty(directory)) {
+                finalFilename = GetDirectoryPath(directory);
+            }
+
+            if (!string.IsNullOrEmpty(defaultName)) {
+                finalFilename += defaultName;
+            }
+
+            fd.FileName = finalFilename;
+            if (extensions != null) {
+                fd.Filter = GetFilterFromFileExtensionList(extensions);
+                fd.FilterIndex = 1;
+                fd.DefaultExt = extensions[0].Extensions[0];
+                fd.AddExtension = true;
+            }
+            else {
+                fd.DefaultExt = string.Empty;
+                fd.Filter = string.Empty;
+                fd.AddExtension = false;
+            }
+            var res = fd.ShowDialog(new WindowWrapper(GetActiveWindow()));
+            var filename = res == DialogResult.OK ? fd.FileName : "";
+            fd.Dispose();
+            return filename;
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            cb.Invoke(SaveFilePanel(title, directory, defaultName, extensions));
+        }
+
+        // .NET Framework FileDialog Filter format
+        // https://msdn.microsoft.com/en-us/library/microsoft.win32.filedialog.filter
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            var filterString = "";
+            foreach (var filter in extensions) {
+                filterString += filter.Name + "(";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += "*." + ext + ",";
+                }
+
+                filterString = filterString.Remove(filterString.Length - 1);
+                filterString += ") |";
+
+                foreach (var ext in filter.Extensions) {
+                    filterString += "*." + ext + "; ";
+                }
+
+                filterString += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+
+        private static string GetDirectoryPath(string directory) {
+            var directoryPath = Path.GetFullPath(directory);
+            if (!directoryPath.EndsWith("\\")) {
+                directoryPath += "\\";
+            }
+            if (Path.GetPathRoot(directoryPath) == directoryPath) {
+                return directory;
+            }
+            return Path.GetDirectoryName(directoryPath) + Path.DirectorySeparatorChar;
+        }
+    }
+}
+
+#endif