Init.

P4 -> GitHub sync.

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Assets/Plugins/StandaloneFileBrowser/IStandaloneFileBrowser.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace SFB {
+    public interface IStandaloneFileBrowser {
+        string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect);
+        string[] OpenFolderPanel(string title, string directory, bool multiselect);
+        string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions);
+
+        void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb);
+        void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb);
+        void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb);
+    }
+}

Assets/Plugins/StandaloneFileBrowser/IStandaloneFileBrowser.cs.meta

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Assets/Plugins/StandaloneFileBrowser/Plugins/StandaloneFileBrowser.bundle/Contents/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
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+	<string>18A391</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>StandaloneFileBrowser</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.gkngkc.sfb</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>StandaloneFileBrowser</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0		</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
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+		<string>MacOSX</string>
+	</array>
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+	<string>1.0</string>
+	<key>CSResourcesFileMapped</key>
+	<true/>
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+	<key>DTXcode</key>
+	<string>1000</string>
+	<key>DTXcodeBuild</key>
+	<string>10A255</string>
+</dict>
+</plist>

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Assets/Plugins/StandaloneFileBrowser/Plugins/StandaloneFileBrowser.jslib

@@ -0,0 +1,90 @@
+var StandaloneFileBrowserWebGLPlugin = {
+    // Open file.
+    // gameObjectNamePtr: Unique GameObject name. Required for calling back unity with SendMessage.
+    // methodNamePtr: Callback method name on given GameObject.
+    // filter: Filter files. Example filters:
+    //     Match all image files: "image/*"
+    //     Match all video files: "video/*"
+    //     Match all audio files: "audio/*"
+    //     Custom: ".plist, .xml, .yaml"
+    // multiselect: Allows multiple file selection
+    UploadFile: function(gameObjectNamePtr, methodNamePtr, filterPtr, multiselect) {
+        gameObjectName = Pointer_stringify(gameObjectNamePtr);
+        methodName = Pointer_stringify(methodNamePtr);
+        filter = Pointer_stringify(filterPtr);
+
+        // Delete if element exist
+        var fileInput = document.getElementById(gameObjectName)
+        if (fileInput) {
+            document.body.removeChild(fileInput);
+        }
+
+        fileInput = document.createElement('input');
+        fileInput.setAttribute('id', gameObjectName);
+        fileInput.setAttribute('type', 'file');
+        fileInput.setAttribute('style','display:none;');
+        fileInput.setAttribute('style','visibility:hidden;');
+        if (multiselect) {
+            fileInput.setAttribute('multiple', '');
+        }
+        if (filter) {
+            fileInput.setAttribute('accept', filter);
+        }
+        fileInput.onclick = function (event) {
+            // File dialog opened
+            this.value = null;
+        };
+        fileInput.onchange = function (event) {
+            // multiselect works
+            var urls = [];
+            for (var i = 0; i < event.target.files.length; i++) {
+                urls.push(URL.createObjectURL(event.target.files[i]));
+            }
+            // File selected
+            SendMessage(gameObjectName, methodName, urls.join());
+
+            // Remove after file selected
+            document.body.removeChild(fileInput);
+        }
+        document.body.appendChild(fileInput);
+
+        document.onmouseup = function() {
+            fileInput.click();
+            document.onmouseup = null;
+        }
+    },
+
+    // Save file
+    // DownloadFile method does not open SaveFileDialog like standalone builds, its just allows user to download file
+    // gameObjectNamePtr: Unique GameObject name. Required for calling back unity with SendMessage.
+    // methodNamePtr: Callback method name on given GameObject.
+    // filenamePtr: Filename with extension
+    // byteArray: byte[]
+    // byteArraySize: byte[].Length
+    DownloadFile: function(gameObjectNamePtr, methodNamePtr, filenamePtr, byteArray, byteArraySize) {
+        gameObjectName = Pointer_stringify(gameObjectNamePtr);
+        methodName = Pointer_stringify(methodNamePtr);
+        filename = Pointer_stringify(filenamePtr);
+
+        var bytes = new Uint8Array(byteArraySize);
+        for (var i = 0; i < byteArraySize; i++) {
+            bytes[i] = HEAPU8[byteArray + i];
+        }
+
+        var downloader = window.document.createElement('a');
+        downloader.setAttribute('id', gameObjectName);
+        downloader.href = window.URL.createObjectURL(new Blob([bytes], { type: 'application/octet-stream' }));
+        downloader.download = filename;
+        document.body.appendChild(downloader);
+
+        document.onmouseup = function() {
+            downloader.click();
+            document.body.removeChild(downloader);
+        	document.onmouseup = null;
+
+            SendMessage(gameObjectName, methodName);
+        }
+    }
+};
+
+mergeInto(LibraryManager.library, StandaloneFileBrowserWebGLPlugin);

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Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowser.cs

@@ -0,0 +1,153 @@
+using System;
+
+namespace SFB {
+    public struct ExtensionFilter {
+        public string Name;
+        public string[] Extensions;
+
+        public ExtensionFilter(string filterName, params string[] filterExtensions) {
+            Name = filterName;
+            Extensions = filterExtensions;
+        }
+    }
+
+    public class StandaloneFileBrowser {
+        private static IStandaloneFileBrowser _platformWrapper = null;
+
+        static StandaloneFileBrowser() {
+#if UNITY_STANDALONE_OSX
+            _platformWrapper = new StandaloneFileBrowserMac();
+#elif UNITY_STANDALONE_WIN
+            _platformWrapper = new StandaloneFileBrowserWindows();
+#elif UNITY_STANDALONE_LINUX
+            _platformWrapper = new StandaloneFileBrowserLinux();
+#elif UNITY_EDITOR
+            _platformWrapper = new StandaloneFileBrowserEditor();
+#endif
+        }
+
+        /// <summary>
+        /// Native open file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extension">Allowed extension</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFilePanel(string title, string directory, string extension, bool multiselect) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            return OpenFilePanel(title, directory, extensions, multiselect);
+        }
+
+        /// <summary>
+        /// Native open file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            return _platformWrapper.OpenFilePanel(title, directory, extensions, multiselect);
+        }
+
+        /// <summary>
+        /// Native open file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extension">Allowed extension</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFilePanelAsync(string title, string directory, string extension, bool multiselect, Action<string[]> cb) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            OpenFilePanelAsync(title, directory, extensions, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native open file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="multiselect">Allow multiple file selection</param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _platformWrapper.OpenFilePanelAsync(title, directory, extensions, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native open folder dialog
+        /// NOTE: Multiple folder selection doesn't supported on Windows
+        /// </summary>
+        /// <param name="title"></param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="multiselect"></param>
+        /// <returns>Returns array of chosen paths. Zero length array when cancelled</returns>
+        public static string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            return _platformWrapper.OpenFolderPanel(title, directory, multiselect);
+        }
+
+        /// <summary>
+        /// Native open folder dialog async
+        /// NOTE: Multiple folder selection doesn't supported on Windows
+        /// </summary>
+        /// <param name="title"></param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="multiselect"></param>
+        /// <param name="cb">Callback")</param>
+        public static void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _platformWrapper.OpenFolderPanelAsync(title, directory, multiselect, cb);
+        }
+
+        /// <summary>
+        /// Native save file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extension">File extension</param>
+        /// <returns>Returns chosen path. Empty string when cancelled</returns>
+        public static string SaveFilePanel(string title, string directory, string defaultName , string extension) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            return SaveFilePanel(title, directory, defaultName, extensions);
+        }
+
+        /// <summary>
+        /// Native save file dialog
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <returns>Returns chosen path. Empty string when cancelled</returns>
+        public static string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return _platformWrapper.SaveFilePanel(title, directory, defaultName, extensions);
+        }
+
+        /// <summary>
+        /// Native save file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extension">File extension</param>
+        /// <param name="cb">Callback")</param>
+        public static void SaveFilePanelAsync(string title, string directory, string defaultName , string extension, Action<string> cb) {
+            var extensions = string.IsNullOrEmpty(extension) ? null : new [] { new ExtensionFilter("", extension) };
+            SaveFilePanelAsync(title, directory, defaultName, extensions, cb);
+        }
+
+        /// <summary>
+        /// Native save file dialog async
+        /// </summary>
+        /// <param name="title">Dialog title</param>
+        /// <param name="directory">Root directory</param>
+        /// <param name="defaultName">Default file name</param>
+        /// <param name="extensions">List of extension filters. Filter Example: new ExtensionFilter("Image Files", "jpg", "png")</param>
+        /// <param name="cb">Callback")</param>
+        public static void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _platformWrapper.SaveFilePanelAsync(title, directory, defaultName, extensions, cb);
+        }
+    }
+}

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowser.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 3c708be74128e4ced9b79eaaf80e8443
+timeCreated: 1483902788
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserEditor.cs

@@ -0,0 +1,56 @@
+#if UNITY_EDITOR
+
+using System;
+using UnityEditor;
+
+namespace SFB {
+    public class StandaloneFileBrowserEditor : IStandaloneFileBrowser  {
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            string path = "";
+
+            if (extensions == null) {
+                path = EditorUtility.OpenFilePanel(title, directory, "");
+            }
+            else {
+                path = EditorUtility.OpenFilePanelWithFilters(title, directory, GetFilterFromFileExtensionList(extensions));
+            }
+
+            return string.IsNullOrEmpty(path) ? new string[0] : new[] { path };
+        }
+
+        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 path = EditorUtility.OpenFolderPanel(title, directory, "");
+            return string.IsNullOrEmpty(path) ? new string[0] : new[] {path};
+        }
+
+        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 ext = extensions != null ? extensions[0].Extensions[0] : "";
+            var name = string.IsNullOrEmpty(ext) ? defaultName : defaultName + "." + ext;
+            return EditorUtility.SaveFilePanel(title, directory, name, ext);
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            cb.Invoke(SaveFilePanel(title, directory, defaultName, extensions));
+        }
+
+        // EditorUtility.OpenFilePanelWithFilters extension filter format
+        private static string[] GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            var filters = new string[extensions.Length * 2];
+            for (int i = 0; i < extensions.Length; i++) {
+                filters[(i * 2)] = extensions[i].Name;
+                filters[(i * 2) + 1] = string.Join(",", extensions[i].Extensions);
+            }
+            return filters;
+        }
+    }
+}
+
+#endif

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserEditor.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 2650af8de2cda46b99b1bc7cf5d30ca5
+timeCreated: 1483902788
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserLinux.cs

@@ -0,0 +1,115 @@
+#if UNITY_STANDALONE_LINUX
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using UnityEngine;
+
+namespace SFB {
+
+    public class StandaloneFileBrowserLinux : IStandaloneFileBrowser {
+        
+        private static Action<string[]> _openFileCb;
+        private static Action<string[]> _openFolderCb;
+        private static Action<string> _saveFileCb;
+
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        public delegate void AsyncCallback(string path);
+
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogInit();
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFilePanel(string title, string directory, string extension, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFilePanelAsync(string title, string directory, string extension, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFolderPanel(string title, string directory, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFolderPanelAsync(string title, string directory, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogSaveFilePanel(string title, string directory, string defaultName, string extension);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogSaveFilePanelAsync(string title, string directory, string defaultName, string extension, AsyncCallback callback);
+
+        public StandaloneFileBrowserLinux()
+        {
+            DialogInit();
+        }
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFilePanel(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _openFileCb = cb;
+            DialogOpenFilePanelAsync(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect,
+                (string result) => { _openFileCb.Invoke(result.Split((char)28)); });
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFolderPanel(
+                title,
+                directory,
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _openFolderCb = cb;
+            DialogOpenFolderPanelAsync(
+                title,
+                directory,
+                multiselect,
+                (string result) => { _openFolderCb.Invoke(result.Split((char)28)); });
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return Marshal.PtrToStringAnsi(DialogSaveFilePanel(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions)));
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _saveFileCb = cb;
+            DialogSaveFilePanelAsync(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions),
+                (string result) => { _saveFileCb.Invoke(result); });
+        }
+
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            if (extensions == null) {
+                return "";
+            }
+
+            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 += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+    }
+}
+
+#endif

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserLinux.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5d3a668018554b8a89c3fe12de72b60c
+timeCreated: 1538067919

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserMac.cs

@@ -0,0 +1,119 @@
+#if UNITY_STANDALONE_OSX
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace SFB {
+    public class StandaloneFileBrowserMac : IStandaloneFileBrowser {
+        private static Action<string[]> _openFileCb;
+        private static Action<string[]> _openFolderCb;
+        private static Action<string> _saveFileCb;
+
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        public delegate void AsyncCallback(string path);
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void openFileCb(string result) {
+            _openFileCb.Invoke(result.Split((char)28));
+        }
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void openFolderCb(string result) {
+            _openFolderCb.Invoke(result.Split((char)28));
+        }
+
+        [AOT.MonoPInvokeCallback(typeof(AsyncCallback))]
+        private static void saveFileCb(string result) {
+            _saveFileCb.Invoke(result);
+        }
+
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFilePanel(string title, string directory, string extension, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFilePanelAsync(string title, string directory, string extension, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogOpenFolderPanel(string title, string directory, bool multiselect);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogOpenFolderPanelAsync(string title, string directory, bool multiselect, AsyncCallback callback);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern IntPtr DialogSaveFilePanel(string title, string directory, string defaultName, string extension);
+        [DllImport("StandaloneFileBrowser")]
+        private static extern void DialogSaveFilePanelAsync(string title, string directory, string defaultName, string extension, AsyncCallback callback);
+
+        public string[] OpenFilePanel(string title, string directory, ExtensionFilter[] extensions, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFilePanel(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFilePanelAsync(string title, string directory, ExtensionFilter[] extensions, bool multiselect, Action<string[]> cb) {
+            _openFileCb = cb;
+            DialogOpenFilePanelAsync(
+                title,
+                directory,
+                GetFilterFromFileExtensionList(extensions),
+                multiselect,
+                openFileCb);
+        }
+
+        public string[] OpenFolderPanel(string title, string directory, bool multiselect) {
+            var paths = Marshal.PtrToStringAnsi(DialogOpenFolderPanel(
+                title,
+                directory,
+                multiselect));
+            return paths.Split((char)28);
+        }
+
+        public void OpenFolderPanelAsync(string title, string directory, bool multiselect, Action<string[]> cb) {
+            _openFolderCb = cb;
+            DialogOpenFolderPanelAsync(
+                title,
+                directory,
+                multiselect,
+                openFolderCb);
+        }
+
+        public string SaveFilePanel(string title, string directory, string defaultName, ExtensionFilter[] extensions) {
+            return Marshal.PtrToStringAnsi(DialogSaveFilePanel(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions)));
+        }
+
+        public void SaveFilePanelAsync(string title, string directory, string defaultName, ExtensionFilter[] extensions, Action<string> cb) {
+            _saveFileCb = cb;
+            DialogSaveFilePanelAsync(
+                title,
+                directory,
+                defaultName,
+                GetFilterFromFileExtensionList(extensions),
+                saveFileCb);
+        }
+
+        private static string GetFilterFromFileExtensionList(ExtensionFilter[] extensions) {
+            if (extensions == null) {
+                return "";
+            }
+
+            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 += "|";
+            }
+            filterString = filterString.Remove(filterString.Length - 1);
+            return filterString;
+        }
+    }
+}
+
+#endif

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserMac.cs.meta

@@ -0,0 +1,12 @@
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+guid: bcb49ddb0ed5644fda9c3b055cafa27a
+timeCreated: 1483902788
+licenseType: Pro
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserWindows.cs

@@ -0,0 +1,137 @@
+#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

Assets/Plugins/StandaloneFileBrowser/StandaloneFileBrowserWindows.cs.meta

@@ -0,0 +1,12 @@
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+guid: 194e247414a78461d83ae606c1b96917
+timeCreated: 1483902788
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/UnityWindowsFileDrag-Drop.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 6bdd66e9646020e4f87e93d796c27b9c
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Plugins/UnityWindowsFileDrag-Drop/B83.Win32.cs

@@ -0,0 +1,494 @@
+/* * * * *
+ * This is a collection of Win API helpers. Mainly dealing with window message hooks
+ * and file drag&drop support for Windows standalone Unity applications.
+ * 
+ * 2019.11.28 - Changed the "UnityDragAndDropHook" class to a static class. This
+ *   has been done for IL2CPP support. IL2CPP can not marshall instance method
+ *   callbacks passed to native code. So the callbacks must be static methods.
+ *   Therefore all fields involved also need to be static.
+ * 
+ * The MIT License (MIT)
+ * 
+ * Copyright (c) 2018 Markus Göbel (Bunny83)
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * 
+ * * * * */
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace B83.Win32
+{
+    public enum HookType : int
+    {
+        WH_JOURNALRECORD = 0,
+        WH_JOURNALPLAYBACK = 1,
+        WH_KEYBOARD = 2,
+        WH_GETMESSAGE = 3,
+        WH_CALLWNDPROC = 4,
+        WH_CBT = 5,
+        WH_SYSMSGFILTER = 6,
+        WH_MOUSE = 7,
+        WH_HARDWARE = 8,
+        WH_DEBUG = 9,
+        WH_SHELL = 10,
+        WH_FOREGROUNDIDLE = 11,
+        WH_CALLWNDPROCRET = 12,
+        WH_KEYBOARD_LL = 13,
+        WH_MOUSE_LL = 14
+    }
+
+    // windows messages
+    public enum WM : uint
+    {
+        NULL = 0x0000,
+        CREATE = 0x0001,
+        DESTROY = 0x0002,
+        MOVE = 0x0003,
+        SIZE = 0x0005,
+        ACTIVATE = 0x0006,
+        SETFOCUS = 0x0007,
+        KILLFOCUS = 0x0008,
+        ENABLE = 0x000A,
+        SETREDRAW = 0x000B,
+        SETTEXT = 0x000C,
+        GETTEXT = 0x000D,
+        GETTEXTLENGTH = 0x000E,
+        PAINT = 0x000F,
+        CLOSE = 0x0010,
+        QUERYENDSESSION = 0x0011,
+        QUERYOPEN = 0x0013,
+        ENDSESSION = 0x0016,
+        QUIT = 0x0012,
+        ERASEBKGND = 0x0014,
+        SYSCOLORCHANGE = 0x0015,
+        SHOWWINDOW = 0x0018,
+        WININICHANGE = 0x001A,
+        SETTINGCHANGE = WININICHANGE,
+        DEVMODECHANGE = 0x001B,
+        ACTIVATEAPP = 0x001C,
+        FONTCHANGE = 0x001D,
+        TIMECHANGE = 0x001E,
+        CANCELMODE = 0x001F,
+        SETCURSOR = 0x0020,
+        MOUSEACTIVATE = 0x0021,
+        CHILDACTIVATE = 0x0022,
+        QUEUESYNC = 0x0023,
+        GETMINMAXINFO = 0x0024,
+        PAINTICON = 0x0026,
+        ICONERASEBKGND = 0x0027,
+        NEXTDLGCTL = 0x0028,
+        SPOOLERSTATUS = 0x002A,
+        DRAWITEM = 0x002B,
+        MEASUREITEM = 0x002C,
+        DELETEITEM = 0x002D,
+        VKEYTOITEM = 0x002E,
+        CHARTOITEM = 0x002F,
+        SETFONT = 0x0030,
+        GETFONT = 0x0031,
+        SETHOTKEY = 0x0032,
+        GETHOTKEY = 0x0033,
+        QUERYDRAGICON = 0x0037,
+        COMPAREITEM = 0x0039,
+        GETOBJECT = 0x003D,
+        COMPACTING = 0x0041,
+        [Obsolete]
+        COMMNOTIFY = 0x0044,
+        WINDOWPOSCHANGING = 0x0046,
+        WINDOWPOSCHANGED = 0x0047,
+        [Obsolete]
+        POWER = 0x0048,
+        COPYDATA = 0x004A,
+        CANCELJOURNAL = 0x004B,
+        NOTIFY = 0x004E,
+        INPUTLANGCHANGEREQUEST = 0x0050,
+        INPUTLANGCHANGE = 0x0051,
+        TCARD = 0x0052,
+        HELP = 0x0053,
+        USERCHANGED = 0x0054,
+        NOTIFYFORMAT = 0x0055,
+        CONTEXTMENU = 0x007B,
+        STYLECHANGING = 0x007C,
+        STYLECHANGED = 0x007D,
+        DISPLAYCHANGE = 0x007E,
+        GETICON = 0x007F,
+        SETICON = 0x0080,
+        NCCREATE = 0x0081,
+        NCDESTROY = 0x0082,
+        NCCALCSIZE = 0x0083,
+        NCHITTEST = 0x0084,
+        NCPAINT = 0x0085,
+        NCACTIVATE = 0x0086,
+        GETDLGCODE = 0x0087,
+        SYNCPAINT = 0x0088,
+        NCMOUSEMOVE = 0x00A0,
+        NCLBUTTONDOWN = 0x00A1,
+        NCLBUTTONUP = 0x00A2,
+        NCLBUTTONDBLCLK = 0x00A3,
+        NCRBUTTONDOWN = 0x00A4,
+        NCRBUTTONUP = 0x00A5,
+        NCRBUTTONDBLCLK = 0x00A6,
+        NCMBUTTONDOWN = 0x00A7,
+        NCMBUTTONUP = 0x00A8,
+        NCMBUTTONDBLCLK = 0x00A9,
+        NCXBUTTONDOWN = 0x00AB,
+        NCXBUTTONUP = 0x00AC,
+        NCXBUTTONDBLCLK = 0x00AD,
+        INPUT_DEVICE_CHANGE = 0x00FE,
+        INPUT = 0x00FF,
+        KEYFIRST = 0x0100,
+        KEYDOWN = 0x0100,
+        KEYUP = 0x0101,
+        CHAR = 0x0102,
+        DEADCHAR = 0x0103,
+        SYSKEYDOWN = 0x0104,
+        SYSKEYUP = 0x0105,
+        SYSCHAR = 0x0106,
+        SYSDEADCHAR = 0x0107,
+        UNICHAR = 0x0109,
+        KEYLAST = 0x0108,
+        IME_STARTCOMPOSITION = 0x010D,
+        IME_ENDCOMPOSITION = 0x010E,
+        IME_COMPOSITION = 0x010F,
+        IME_KEYLAST = 0x010F,
+        INITDIALOG = 0x0110,
+        COMMAND = 0x0111,
+        SYSCOMMAND = 0x0112,
+        TIMER = 0x0113,
+        HSCROLL = 0x0114,
+        VSCROLL = 0x0115,
+        INITMENU = 0x0116,
+        INITMENUPOPUP = 0x0117,
+        MENUSELECT = 0x011F,
+        MENUCHAR = 0x0120,
+        ENTERIDLE = 0x0121,
+        MENURBUTTONUP = 0x0122,
+        MENUDRAG = 0x0123,
+        MENUGETOBJECT = 0x0124,
+        UNINITMENUPOPUP = 0x0125,
+        MENUCOMMAND = 0x0126,
+        CHANGEUISTATE = 0x0127,
+        UPDATEUISTATE = 0x0128,
+        QUERYUISTATE = 0x0129,
+        CTLCOLORMSGBOX = 0x0132,
+        CTLCOLOREDIT = 0x0133,
+        CTLCOLORLISTBOX = 0x0134,
+        CTLCOLORBTN = 0x0135,
+        CTLCOLORDLG = 0x0136,
+        CTLCOLORSCROLLBAR = 0x0137,
+        CTLCOLORSTATIC = 0x0138,
+        MOUSEFIRST = 0x0200,
+        MOUSEMOVE = 0x0200,
+        LBUTTONDOWN = 0x0201,
+        LBUTTONUP = 0x0202,
+        LBUTTONDBLCLK = 0x0203,
+        RBUTTONDOWN = 0x0204,
+        RBUTTONUP = 0x0205,
+        RBUTTONDBLCLK = 0x0206,
+        MBUTTONDOWN = 0x0207,
+        MBUTTONUP = 0x0208,
+        MBUTTONDBLCLK = 0x0209,
+        MOUSEWHEEL = 0x020A,
+        XBUTTONDOWN = 0x020B,
+        XBUTTONUP = 0x020C,
+        XBUTTONDBLCLK = 0x020D,
+        MOUSEHWHEEL = 0x020E,
+        MOUSELAST = 0x020E,
+        PARENTNOTIFY = 0x0210,
+        ENTERMENULOOP = 0x0211,
+        EXITMENULOOP = 0x0212,
+        NEXTMENU = 0x0213,
+        SIZING = 0x0214,
+        CAPTURECHANGED = 0x0215,
+        MOVING = 0x0216,
+        POWERBROADCAST = 0x0218,
+        DEVICECHANGE = 0x0219,
+        MDICREATE = 0x0220,
+        MDIDESTROY = 0x0221,
+        MDIACTIVATE = 0x0222,
+        MDIRESTORE = 0x0223,
+        MDINEXT = 0x0224,
+        MDIMAXIMIZE = 0x0225,
+        MDITILE = 0x0226,
+        MDICASCADE = 0x0227,
+        MDIICONARRANGE = 0x0228,
+        MDIGETACTIVE = 0x0229,
+        MDISETMENU = 0x0230,
+        ENTERSIZEMOVE = 0x0231,
+        EXITSIZEMOVE = 0x0232,
+        DROPFILES = 0x0233,
+        MDIREFRESHMENU = 0x0234,
+        IME_SETCONTEXT = 0x0281,
+        IME_NOTIFY = 0x0282,
+        IME_CONTROL = 0x0283,
+        IME_COMPOSITIONFULL = 0x0284,
+        IME_SELECT = 0x0285,
+        IME_CHAR = 0x0286,
+        IME_REQUEST = 0x0288,
+        IME_KEYDOWN = 0x0290,
+        IME_KEYUP = 0x0291,
+        MOUSEHOVER = 0x02A1,
+        MOUSELEAVE = 0x02A3,
+        NCMOUSEHOVER = 0x02A0,
+        NCMOUSELEAVE = 0x02A2,
+        WTSSESSION_CHANGE = 0x02B1,
+        TABLET_FIRST = 0x02c0,
+        TABLET_LAST = 0x02df,
+        CUT = 0x0300,
+        COPY = 0x0301,
+        PASTE = 0x0302,
+        CLEAR = 0x0303,
+        UNDO = 0x0304,
+        RENDERFORMAT = 0x0305,
+        RENDERALLFORMATS = 0x0306,
+        DESTROYCLIPBOARD = 0x0307,
+        DRAWCLIPBOARD = 0x0308,
+        PAINTCLIPBOARD = 0x0309,
+        VSCROLLCLIPBOARD = 0x030A,
+        SIZECLIPBOARD = 0x030B,
+        ASKCBFORMATNAME = 0x030C,
+        CHANGECBCHAIN = 0x030D,
+        HSCROLLCLIPBOARD = 0x030E,
+        QUERYNEWPALETTE = 0x030F,
+        PALETTEISCHANGING = 0x0310,
+        PALETTECHANGED = 0x0311,
+        HOTKEY = 0x0312,
+        PRINT = 0x0317,
+        PRINTCLIENT = 0x0318,
+        APPCOMMAND = 0x0319,
+        THEMECHANGED = 0x031A,
+        CLIPBOARDUPDATE = 0x031D,
+        DWMCOMPOSITIONCHANGED = 0x031E,
+        DWMNCRENDERINGCHANGED = 0x031F,
+        DWMCOLORIZATIONCOLORCHANGED = 0x0320,
+        DWMWINDOWMAXIMIZEDCHANGE = 0x0321,
+        GETTITLEBARINFOEX = 0x033F,
+        HANDHELDFIRST = 0x0358,
+        HANDHELDLAST = 0x035F,
+        AFXFIRST = 0x0360,
+        AFXLAST = 0x037F,
+        PENWINFIRST = 0x0380,
+        PENWINLAST = 0x038F,
+        APP = 0x8000,
+        USER = 0x0400,
+        CPL_LAUNCH = USER + 0x1000,
+        CPL_LAUNCHED = USER + 0x1001,
+        SYSTIMER = 0x118,
+    }
+
+    // WH_CALLWNDPROC
+    [StructLayout(LayoutKind.Sequential)]
+    public struct CWPSTRUCT
+    {
+        public IntPtr lParam;
+        public IntPtr wParam;
+        public WM message;
+        public IntPtr hwnd;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct POINT
+    {
+        public int x, y;
+        public POINT(int aX, int aY)
+        {
+            x = aX;
+            y = aY;
+        }
+        public override string ToString()
+        {
+            return "(" + x + ", " + y + ")";
+        }
+    }
+
+    //WH_GETMESSAGE
+    [StructLayout(LayoutKind.Sequential)]
+    public struct MSG
+    {
+        public IntPtr hwnd;
+        public WM message;
+        public IntPtr wParam;
+        public IntPtr lParam;
+        public ushort time;
+        public POINT pt;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct RECT
+    {
+        public int Left, Top, Right, Bottom;
+
+        public RECT(int left, int top, int right, int bottom)
+        {
+            Left = left;
+            Top = top;
+            Right = right;
+            Bottom = bottom;
+        }
+        public override string ToString()
+        {
+            return "(" + Left + ", " + Top + ", " + Right + ", " + Bottom + ")";
+        }
+    }
+
+    public delegate IntPtr HookProc(int code, IntPtr wParam, ref MSG lParam);
+    public delegate bool EnumThreadDelegate(IntPtr Hwnd, IntPtr lParam);
+
+#if UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN
+
+    public static class Window
+    {
+        [DllImport("user32.dll")]
+        public static extern bool EnumThreadWindows(uint dwThreadId, EnumThreadDelegate lpfn, IntPtr lParam);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);
+
+        [DllImport("user32.dll")]
+        public static extern bool IsWindowVisible(IntPtr hWnd);
+
+        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+        static extern int GetClassName(IntPtr hWnd, System.Text.StringBuilder lpClassName, int nMaxCount);
+        public static string GetClassName(IntPtr hWnd)
+        {
+            var sb = new System.Text.StringBuilder(256);
+            int count = GetClassName(hWnd, sb, 256);
+            return sb.ToString(0, count);
+        }
+
+        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+        static extern int GetWindowTextLength(IntPtr hWnd);
+        [DllImport("user32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+        static extern int GetWindowText(IntPtr hWnd, System.Text.StringBuilder lpString, int nMaxCount);
+        public static string GetWindowText(IntPtr hWnd)
+        {
+            int length = GetWindowTextLength(hWnd) + 2;
+            var sb = new System.Text.StringBuilder(length);
+            int count = GetWindowText(hWnd, sb, length);
+            return sb.ToString(0, count);
+        }
+    }
+
+    public static class WinAPI
+    {
+        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
+        public static extern IntPtr GetModuleHandle(string lpModuleName);
+        [DllImport("kernel32.dll")]
+        public static extern uint GetCurrentThreadId();
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern IntPtr SetWindowsHookEx(HookType hookType, HookProc lpfn, IntPtr hMod, uint dwThreadId);
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool UnhookWindowsHookEx(IntPtr hhk);
+        [DllImport("user32.dll")]
+        public static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, ref MSG lParam);
+
+        [DllImport("shell32.dll")]
+        public static extern void DragAcceptFiles(IntPtr hwnd, bool fAccept);
+        [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
+        public static extern uint DragQueryFile(IntPtr hDrop, uint iFile, System.Text.StringBuilder lpszFile, uint cch);
+        [DllImport("shell32.dll")]
+        public static extern void DragFinish(IntPtr hDrop);
+
+        [DllImport("shell32.dll")]
+        public static extern void DragQueryPoint(IntPtr hDrop, out POINT pos);
+    }
+#endif
+
+
+    public static class UnityDragAndDropHook
+    {
+        public delegate void DroppedFilesEvent(List<string> aPathNames, POINT aDropPoint);
+#pragma warning disable CS0067
+        public static event DroppedFilesEvent OnDroppedFiles;
+#pragma warning restore CS0067
+
+#if UNITY_STANDALONE_WIN && !UNITY_EDITOR_WIN
+
+        private static uint threadId;
+        private static IntPtr mainWindow = IntPtr.Zero;
+        private static IntPtr m_Hook;
+        private static string m_ClassName = "UnityWndClass";
+
+        // attribute required for IL2CPP, also has to be a static method
+        [AOT.MonoPInvokeCallback(typeof(EnumThreadDelegate))]
+        private static bool EnumCallback(IntPtr W, IntPtr _)
+        {
+            if (Window.IsWindowVisible(W) && (mainWindow == IntPtr.Zero || (m_ClassName != null && Window.GetClassName(W) == m_ClassName)))
+            {
+                mainWindow = W;
+            }
+            return true;
+        }
+
+        public static void InstallHook()
+        {
+            threadId = WinAPI.GetCurrentThreadId();
+            if (threadId > 0)
+                Window.EnumThreadWindows(threadId, EnumCallback, IntPtr.Zero);
+
+            var hModule = WinAPI.GetModuleHandle(null);
+            m_Hook = WinAPI.SetWindowsHookEx(HookType.WH_GETMESSAGE, Callback, hModule, threadId);
+            // Allow dragging of files onto the main window. generates the WM_DROPFILES message
+            WinAPI.DragAcceptFiles(mainWindow, true);
+        }
+        public static void UninstallHook()
+        {
+            WinAPI.UnhookWindowsHookEx(m_Hook);
+            WinAPI.DragAcceptFiles(mainWindow, false);
+            m_Hook = IntPtr.Zero;
+        }
+
+        // attribute required for IL2CPP, also has to be a static method
+        [AOT.MonoPInvokeCallback(typeof(HookProc))]
+        private static IntPtr Callback(int code, IntPtr wParam, ref MSG lParam)
+        {
+            if (code == 0 && lParam.message == WM.DROPFILES)
+            {
+                POINT pos;
+                WinAPI.DragQueryPoint(lParam.wParam, out pos);
+
+                // 0xFFFFFFFF as index makes the method return the number of files
+                uint n = WinAPI.DragQueryFile(lParam.wParam, 0xFFFFFFFF, null, 0);
+                var sb = new System.Text.StringBuilder(1024);
+
+                List<string> result = new List<string>();
+                for (uint i = 0; i < n; i++)
+                {
+                    int len = (int)WinAPI.DragQueryFile(lParam.wParam, i, sb, 1024);
+                    result.Add(sb.ToString(0, len));
+                    sb.Length = 0;
+                }
+                WinAPI.DragFinish(lParam.wParam);
+                if (OnDroppedFiles != null)
+                    OnDroppedFiles(result, pos);
+            }
+            return WinAPI.CallNextHookEx(m_Hook, code, wParam, ref lParam);
+        }
+#else
+        public static void InstallHook()
+        {
+        }
+        public static void UninstallHook()
+        {
+        }
+#endif
+    }
+}

Assets/Plugins/UnityWindowsFileDrag-Drop/B83.Win32.cs.meta

@@ -0,0 +1,11 @@
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+guid: fc411cd2c138a56498372ffcbebd36c3
+MonoImporter:
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Assets/Plugins/UnityWindowsFileDrag-Drop/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Markus Göbel (Bunny83)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Assets/Plugins/UnityWindowsFileDrag-Drop/LICENSE.meta

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+  externalObjects: {}
+  userData: 
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Assets/Plugins/UnityWindowsFileDrag-Drop/README.md

@@ -0,0 +1,8 @@
+# UnityWindowsFileDrag&Drop
+Adds file drag and drop support for Unity standalone builds on windows.
+
+It uses the GetMessage hook to intercept the WM_DROPFILES message
+
+See the "FileDragAndDrop.cs" or "ImageExample.cs" file for an example usage.
+
+Due to too many issues in the Unity editor (causes random silent crashes) I have disabled the hook when tested in playmode inside the editor. So this feature only works in a build.

Assets/Plugins/UnityWindowsFileDrag-Drop/README.md.meta

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