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220 lines
9.0 KiB
220 lines
9.0 KiB
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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namespace amecs.Misc
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{
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public class FolderPicker
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{
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private readonly List<string> _resultPaths = new List<string>();
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private readonly List<string> _resultNames = new List<string>();
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public IReadOnlyList<string> ResultPaths => _resultPaths;
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public IReadOnlyList<string> ResultNames => _resultNames;
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public string ResultPath => ResultPaths.FirstOrDefault();
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public string ResultName => ResultNames.FirstOrDefault();
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public virtual string InputPath { get; set; }
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public virtual bool ForceFileSystem { get; set; }
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public virtual bool Multiselect { get; set; }
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public virtual string Title { get; set; }
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public virtual string OkButtonLabel { get; set; }
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public virtual string FileNameLabel { get; set; }
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protected virtual int SetOptions(int options)
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{
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if (ForceFileSystem)
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{
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options |= (int)FOS.FOS_FORCEFILESYSTEM;
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}
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if (Multiselect)
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{
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options |= (int)FOS.FOS_ALLOWMULTISELECT;
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}
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return options;
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}
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// for all .NET
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public virtual bool? ShowDialog(IntPtr owner, bool throwOnError = false)
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{
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var dialog = (IFileOpenDialog)new FileOpenDialog();
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if (!string.IsNullOrEmpty(InputPath))
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{
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if (CheckHr(SHCreateItemFromParsingName(InputPath, null, typeof(IShellItem).GUID, out var item), throwOnError) != 0)
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return null;
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dialog.SetFolder(item);
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}
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var options = FOS.FOS_PICKFOLDERS;
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options = (FOS)SetOptions((int)options);
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dialog.SetOptions(options);
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if (Title != null)
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{
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dialog.SetTitle(Title);
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}
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if (OkButtonLabel != null)
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{
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dialog.SetOkButtonLabel(OkButtonLabel);
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}
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if (FileNameLabel != null)
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{
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dialog.SetFileName(FileNameLabel);
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}
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if (owner == IntPtr.Zero)
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{
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owner = Process.GetCurrentProcess().MainWindowHandle;
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if (owner == IntPtr.Zero)
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{
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owner = GetDesktopWindow();
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}
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}
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var hr = dialog.Show(owner);
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if (hr == ERROR_CANCELLED)
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return null;
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if (CheckHr(hr, throwOnError) != 0)
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return null;
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if (CheckHr(dialog.GetResults(out var items), throwOnError) != 0)
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return null;
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items.GetCount(out var count);
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for (var i = 0; i < count; i++)
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{
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items.GetItemAt(i, out var item);
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CheckHr(item.GetDisplayName(SIGDN.SIGDN_DESKTOPABSOLUTEPARSING, out var path), throwOnError);
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CheckHr(item.GetDisplayName(SIGDN.SIGDN_DESKTOPABSOLUTEEDITING, out var name), throwOnError);
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if (path != null || name != null)
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{
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_resultPaths.Add(path);
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_resultNames.Add(name);
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}
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}
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return true;
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}
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private static int CheckHr(int hr, bool throwOnError)
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{
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if (hr != 0 && throwOnError) Marshal.ThrowExceptionForHR(hr);
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return hr;
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}
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[DllImport("shell32")]
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private static extern int SHCreateItemFromParsingName([MarshalAs(UnmanagedType.LPWStr)] string pszPath, IBindCtx pbc, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, out IShellItem ppv);
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[DllImport("user32")]
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private static extern IntPtr GetDesktopWindow();
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#pragma warning disable IDE1006 // Naming Styles
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private const int ERROR_CANCELLED = unchecked((int)0x800704C7);
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#pragma warning restore IDE1006 // Naming Styles
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[ComImport, Guid("DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7")] // CLSID_FileOpenDialog
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private class FileOpenDialog { }
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[ComImport, Guid("d57c7288-d4ad-4768-be02-9d969532d960"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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private interface IFileOpenDialog
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{
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[PreserveSig] int Show(IntPtr parent); // IModalWindow
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[PreserveSig] int SetFileTypes(); // not fully defined
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[PreserveSig] int SetFileTypeIndex(int iFileType);
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[PreserveSig] int GetFileTypeIndex(out int piFileType);
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[PreserveSig] int Advise(); // not fully defined
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[PreserveSig] int Unadvise();
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[PreserveSig] int SetOptions(FOS fos);
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[PreserveSig] int GetOptions(out FOS pfos);
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[PreserveSig] int SetDefaultFolder(IShellItem psi);
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[PreserveSig] int SetFolder(IShellItem psi);
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[PreserveSig] int GetFolder(out IShellItem ppsi);
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[PreserveSig] int GetCurrentSelection(out IShellItem ppsi);
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[PreserveSig] int SetFileName([MarshalAs(UnmanagedType.LPWStr)] string pszName);
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[PreserveSig] int GetFileName([MarshalAs(UnmanagedType.LPWStr)] out string pszName);
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[PreserveSig] int SetTitle([MarshalAs(UnmanagedType.LPWStr)] string pszTitle);
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[PreserveSig] int SetOkButtonLabel([MarshalAs(UnmanagedType.LPWStr)] string pszText);
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[PreserveSig] int SetFileNameLabel([MarshalAs(UnmanagedType.LPWStr)] string pszLabel);
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[PreserveSig] int GetResult(out IShellItem ppsi);
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[PreserveSig] int AddPlace(IShellItem psi, int alignment);
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[PreserveSig] int SetDefaultExtension([MarshalAs(UnmanagedType.LPWStr)] string pszDefaultExtension);
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[PreserveSig] int Close(int hr);
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[PreserveSig] int SetClientGuid(); // not fully defined
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[PreserveSig] int ClearClientData();
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[PreserveSig] int SetFilter([MarshalAs(UnmanagedType.IUnknown)] object pFilter);
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[PreserveSig] int GetResults(out IShellItemArray ppenum);
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[PreserveSig] int GetSelectedItems([MarshalAs(UnmanagedType.IUnknown)] out object ppsai);
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}
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[ComImport, Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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private interface IShellItem
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{
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[PreserveSig] int BindToHandler(); // not fully defined
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[PreserveSig] int GetParent(); // not fully defined
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[PreserveSig] int GetDisplayName(SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);
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[PreserveSig] int GetAttributes(); // not fully defined
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[PreserveSig] int Compare(); // not fully defined
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}
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[ComImport, Guid("b63ea76d-1f85-456f-a19c-48159efa858b"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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private interface IShellItemArray
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{
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[PreserveSig] int BindToHandler(); // not fully defined
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[PreserveSig] int GetPropertyStore(); // not fully defined
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[PreserveSig] int GetPropertyDescriptionList(); // not fully defined
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[PreserveSig] int GetAttributes(); // not fully defined
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[PreserveSig] int GetCount(out int pdwNumItems);
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[PreserveSig] int GetItemAt(int dwIndex, out IShellItem ppsi);
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[PreserveSig] int EnumItems(); // not fully defined
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}
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#pragma warning disable CA1712 // Do not prefix enum values with type name
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private enum SIGDN : uint
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{
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SIGDN_DESKTOPABSOLUTEEDITING = 0x8004c000,
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SIGDN_DESKTOPABSOLUTEPARSING = 0x80028000,
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SIGDN_FILESYSPATH = 0x80058000,
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SIGDN_NORMALDISPLAY = 0,
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SIGDN_PARENTRELATIVE = 0x80080001,
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SIGDN_PARENTRELATIVEEDITING = 0x80031001,
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SIGDN_PARENTRELATIVEFORADDRESSBAR = 0x8007c001,
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SIGDN_PARENTRELATIVEPARSING = 0x80018001,
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SIGDN_URL = 0x80068000
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}
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[Flags]
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private enum FOS
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{
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FOS_OVERWRITEPROMPT = 0x2,
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FOS_STRICTFILETYPES = 0x4,
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FOS_NOCHANGEDIR = 0x8,
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FOS_PICKFOLDERS = 0x20,
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FOS_FORCEFILESYSTEM = 0x40,
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FOS_ALLNONSTORAGEITEMS = 0x80,
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FOS_NOVALIDATE = 0x100,
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FOS_ALLOWMULTISELECT = 0x200,
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FOS_PATHMUSTEXIST = 0x800,
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FOS_FILEMUSTEXIST = 0x1000,
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FOS_CREATEPROMPT = 0x2000,
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FOS_SHAREAWARE = 0x4000,
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FOS_NOREADONLYRETURN = 0x8000,
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FOS_NOTESTFILECREATE = 0x10000,
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FOS_HIDEMRUPLACES = 0x20000,
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FOS_HIDEPINNEDPLACES = 0x40000,
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FOS_NODEREFERENCELINKS = 0x100000,
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FOS_OKBUTTONNEEDSINTERACTION = 0x200000,
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FOS_DONTADDTORECENT = 0x2000000,
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FOS_FORCESHOWHIDDEN = 0x10000000,
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FOS_DEFAULTNOMINIMODE = 0x20000000,
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FOS_FORCEPREVIEWPANEON = 0x40000000,
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FOS_SUPPORTSTREAMABLEITEMS = unchecked((int)0x80000000)
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}
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#pragma warning restore CA1712 // Do not prefix enum values with type name
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}
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}
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