root / trunk / Pithos.ShellExtensions / Menus / FileContextMenu.cs @ 4d301e8e
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using System; |
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using System.Collections.Generic; |
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using System.ComponentModel.Composition; |
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using System.Diagnostics; |
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using System.Diagnostics.Contracts; |
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using System.Drawing; |
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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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using System.Text; |
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using Pithos.ShellExtensions.Properties; |
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|
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namespace Pithos.ShellExtensions.Menus |
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{ |
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[ClassInterface(ClassInterfaceType.None)] |
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[Guid("B1F1405D-94A1-4692-B72F-FC8CAF8B8700"), ComVisible(true)] |
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public class FileContextMenu : IShellExtInit, IContextMenu |
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{ |
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private const string MenuHandlername = "CSShellExtContextMenuHandler.FileContextMenuExt"; |
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|
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|
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private readonly Dictionary<string, MenuItem> _items; |
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|
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|
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[Import] |
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public FileContext Context { get; set; } |
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|
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private IntPtr _gotoBitmap=IntPtr.Zero; |
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private IntPtr _versionBitmap = IntPtr.Zero; |
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|
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public FileContextMenu() |
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{ |
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_gotoBitmap = GetBitmapPtr(Resources.MenuGoToPithos); |
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_versionBitmap = GetBitmapPtr(Resources.MenuHistory); |
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|
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|
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|
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|
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_items = new Dictionary<string, MenuItem>{ |
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{"gotoPithos",new MenuItem{ |
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MenuText = "&Go to Pithos", |
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Verb = "gotoPithos", |
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VerbCanonicalName = "PITHOSGoTo", |
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VerbHelpText = "Go to Pithos", |
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MenuDisplayId = 1, |
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MenuCommand=OnGotoPithos, |
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DisplayFlags=DisplayFlags.All, |
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MenuBitmap = _gotoBitmap |
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}}, |
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{"prevVersions",new MenuItem{ |
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MenuText = "&Show Previous Versions", |
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Verb = "prevVersions", |
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VerbCanonicalName = "PITHOSPrevVersions", |
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VerbHelpText = "Go to Pithos and display previous versions", |
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MenuDisplayId = 2, |
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MenuCommand=OnVerbDisplayFileName, |
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DisplayFlags=DisplayFlags.File, |
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MenuBitmap=_versionBitmap |
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}} |
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}; |
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|
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IoC.Current.Compose(this); |
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|
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|
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} |
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|
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|
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~FileContextMenu() |
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{ |
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if (_gotoBitmap != IntPtr.Zero) |
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{ |
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NativeMethods.DeleteObject(_gotoBitmap); |
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_gotoBitmap= IntPtr.Zero; |
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} |
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if (_versionBitmap != IntPtr.Zero) |
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{ |
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NativeMethods.DeleteObject(_versionBitmap); |
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_versionBitmap = IntPtr.Zero; |
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} |
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|
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} |
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private static IntPtr GetBitmapPtr(Bitmap gotoBitmap) |
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{ |
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gotoBitmap.MakeTransparent(gotoBitmap.GetPixel(0, 0)); |
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var hbitmap = gotoBitmap.GetHbitmap(); |
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return hbitmap; |
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} |
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|
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|
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void OnVerbDisplayFileName(IntPtr hWnd) |
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{ |
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string message = String.Format("The selected file is {0}\r\n\r\nThe selected Path is {1}", |
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Context.CurrentFile, |
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Context.CurrentFolder); |
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|
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System.Windows.Forms.MessageBox.Show( |
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message, |
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"CSShellExtContextMenuHandler"); |
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NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_ASSOCCHANGED, HChangeNotifyFlags.SHCNF_IDLIST, |
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IntPtr.Zero, IntPtr.Zero); |
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} |
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|
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void OnGotoPithos(IntPtr hWnd) |
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{ |
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Context.Settings.Reload(); |
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Process.Start(Context.Settings.PithosSite); |
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} |
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|
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|
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#region Shell Extension Registration |
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|
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[ComRegisterFunction] |
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public static void Register(Type t) |
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{ |
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try |
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{ |
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ShellExtReg.RegisterShellExtContextMenuHandler(t.GUID, ".cs", |
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MenuHandlername); |
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ShellExtReg.RegisterShellExtContextMenuHandler(t.GUID, "Directory", |
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MenuHandlername); |
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ShellExtReg.RegisterShellExtContextMenuHandler(t.GUID, @"Directory\Background", |
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MenuHandlername); |
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ShellExtReg.RegisterShellExtContextMenuHandler(t.GUID, "*", |
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MenuHandlername); |
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|
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//ShellExtReg.MarkApproved(t.GUID, MenuHandlername); |
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} |
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catch (Exception ex) |
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{ |
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Console.WriteLine(ex.Message); // Log the error |
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throw; // Re-throw the exception |
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} |
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} |
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|
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[ComUnregisterFunction] |
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public static void Unregister(Type t) |
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{ |
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try |
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{ |
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ShellExtReg.UnregisterShellExtContextMenuHandler(t.GUID, ".cs", MenuHandlername); |
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ShellExtReg.UnregisterShellExtContextMenuHandler(t.GUID, "Directory", MenuHandlername); |
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ShellExtReg.UnregisterShellExtContextMenuHandler(t.GUID, @"Directory\Background", MenuHandlername); |
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ShellExtReg.UnregisterShellExtContextMenuHandler(t.GUID, "*", MenuHandlername); |
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|
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//ShellExtReg.RemoveApproved(t.GUID, MenuHandlername); |
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} |
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catch (Exception ex) |
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{ |
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Console.WriteLine(ex.Message); // Log the error |
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throw; // Re-throw the exception |
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} |
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} |
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|
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#endregion |
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|
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|
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#region IShellExtInit Members |
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|
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/// <summary> |
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/// Initialize the context menu handler. |
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/// </summary> |
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/// <param name="pidlFolder"> |
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/// A pointer to an ITEMIDLIST structure that uniquely identifies a folder. |
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/// </param> |
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/// <param name="pDataObj"> |
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/// A pointer to an IDataObject interface object that can be used to retrieve |
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/// the objects being acted upon. |
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/// </param> |
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/// <param name="hKeyProgID"> |
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/// The registry key for the file object or folder type. |
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/// </param> |
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public void Initialize(IntPtr pidlFolder, IntPtr pDataObj, IntPtr hKeyProgID) |
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{ |
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|
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if(pDataObj == IntPtr.Zero && pidlFolder == IntPtr.Zero) |
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{ |
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throw new ArgumentException("pidlFolder and pDataObj shouldn't be null at the same time"); |
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} |
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|
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|
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Debug.WriteLine("Initializing", LogCategories.ShellMenu); |
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|
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if (pDataObj != IntPtr.Zero) |
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{ |
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Debug.WriteLine("Got a data object", LogCategories.ShellMenu); |
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|
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FORMATETC fe = new FORMATETC(); |
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fe.cfFormat = (short)CLIPFORMAT.CF_HDROP; |
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fe.ptd = IntPtr.Zero; |
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fe.dwAspect = DVASPECT.DVASPECT_CONTENT; |
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fe.lindex = -1; |
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fe.tymed = TYMED.TYMED_HGLOBAL; |
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STGMEDIUM stm = new STGMEDIUM(); |
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|
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// The pDataObj pointer contains the objects being acted upon. In this |
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// example, we get an HDROP handle for enumerating the selected files |
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// and folders. |
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IDataObject dataObject = (IDataObject)Marshal.GetObjectForIUnknown(pDataObj); |
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dataObject.GetData(ref fe, out stm); |
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|
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try |
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{ |
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// Get an HDROP handle. |
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IntPtr hDrop = stm.unionmember; |
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if (hDrop == IntPtr.Zero) |
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{ |
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throw new ArgumentException(); |
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} |
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|
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// Determine how many files are involved in this operation. |
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uint nFiles = NativeMethods.DragQueryFile(hDrop, UInt32.MaxValue, null, 0); |
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|
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Debug.WriteLine(String.Format("Got {0} files", nFiles), LogCategories.ShellMenu); |
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// This code sample displays the custom context menu item when only |
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// one file is selected. |
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if (nFiles == 1) |
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{ |
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// Get the path of the file. |
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var fileName = new StringBuilder(260); |
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if (0 == NativeMethods.DragQueryFile(hDrop, 0, fileName, |
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fileName.Capacity)) |
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{ |
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Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
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} |
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Context.CurrentFile = fileName.ToString(); |
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} |
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/* else |
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{ |
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Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
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}*/ |
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|
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// [-or-] |
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|
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// Enumerate the selected files and folders. |
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//if (nFiles > 0) |
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//{ |
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// StringCollection selectedFiles = new StringCollection(); |
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// StringBuilder fileName = new StringBuilder(260); |
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// for (uint i = 0; i < nFiles; i++) |
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// { |
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// // Get the next file name. |
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// if (0 != NativeMethods.DragQueryFile(hDrop, i, fileName, |
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// fileName.Capacity)) |
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// { |
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// // Add the file name to the list. |
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// selectedFiles.Add(fileName.ToString()); |
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// } |
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// } |
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// |
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// // If we did not find any files we can work with, throw |
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// // exception. |
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// if (selectedFiles.Count == 0) |
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// { |
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// Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
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// } |
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//} |
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//else |
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//{ |
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// Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
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//} |
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} |
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finally |
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{ |
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NativeMethods.ReleaseStgMedium(ref stm); |
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} |
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} |
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|
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if (pidlFolder != IntPtr.Zero) |
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{ |
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Debug.WriteLine("Got a folder", LogCategories.ShellMenu); |
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StringBuilder path = new StringBuilder(); |
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if (!NativeMethods.SHGetPathFromIDList(pidlFolder, path)) |
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{ |
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int error = Marshal.GetHRForLastWin32Error(); |
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Marshal.ThrowExceptionForHR(error); |
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} |
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Context.CurrentFolder = path.ToString(); |
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Debug.WriteLine(String.Format("Folder is {0}", Context.CurrentFolder), LogCategories.ShellMenu); |
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} |
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} |
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|
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#endregion |
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|
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|
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#region IContextMenu Members |
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|
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/// <summary> |
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/// Add commands to a shortcut menu. |
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/// </summary> |
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/// <param name="hMenu">A handle to the shortcut menu.</param> |
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/// <param name="iMenu"> |
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/// The zero-based position at which to insert the first new menu item. |
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/// </param> |
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/// <param name="idCmdFirst"> |
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/// The minimum value that the handler can specify for a menu item ID. |
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/// </param> |
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/// <param name="idCmdLast"> |
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/// The maximum value that the handler can specify for a menu item ID. |
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/// </param> |
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/// <param name="uFlags"> |
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/// Optional flags that specify how the shortcut menu can be changed. |
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/// </param> |
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/// <returns> |
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/// If successful, returns an HRESULT value that has its severity value set |
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/// to SEVERITY_SUCCESS and its code value set to the offset of the largest |
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/// command identifier that was assigned, plus one. |
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/// </returns> |
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public int QueryContextMenu( |
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IntPtr hMenu, |
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uint iMenu, |
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uint idCmdFirst, |
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uint idCmdLast, |
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uint uFlags) |
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{ |
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Debug.WriteLine("Start qcm", LogCategories.ShellMenu); |
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// If uFlags include CMF_DEFAULTONLY then we should not do anything. |
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Debug.WriteLine(String.Format("Flags {0}", uFlags), LogCategories.ShellMenu); |
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|
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if (((uint)CMF.CMF_DEFAULTONLY & uFlags) != 0) |
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{ |
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Debug.WriteLine("Default only flag, returning", LogCategories.ShellMenu); |
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return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0, 0); |
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} |
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|
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if (!Context.IsManaged) |
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{ |
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Debug.WriteLine("Not a PITHOS folder",LogCategories.ShellMenu); |
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return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0, 0); |
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} |
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|
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/* |
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if (!selectedFolder.ToLower().Contains("pithos")) |
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return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0, 0); |
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*/ |
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|
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// Use either InsertMenu or InsertMenuItem to add menu items. |
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|
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uint largestID = 0; |
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|
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DisplayFlags itemType = (Context.IsFolder) ? DisplayFlags.Folder : DisplayFlags.File; |
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|
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Debug.WriteLine(String.Format("Item Flags {0}", itemType), LogCategories.ShellMenu); |
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|
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if (!NativeMethods.InsertMenu(hMenu, idCmdFirst, MF.MF_SEPARATOR | MF.MF_BYPOSITION, 0, String.Empty)) |
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{ |
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Trace.TraceError("Error adding separator 1\r\n{0}", Marshal.GetLastWin32Error()); |
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return Marshal.GetHRForLastWin32Error(); |
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} |
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|
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foreach (var menuItem in _items.Values) |
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{ |
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Debug.WriteLine(String.Format("Menu Flags {0}", menuItem.DisplayFlags), LogCategories.ShellMenu); |
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if ((itemType & menuItem.DisplayFlags) != DisplayFlags.None) |
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{ |
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Debug.WriteLine("Adding Menu", LogCategories.ShellMenu); |
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|
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MENUITEMINFO mii = menuItem.CreateInfo(idCmdFirst); |
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if (!NativeMethods.InsertMenuItem(hMenu, iMenu, true, ref mii)) |
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{ |
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var lastError = Marshal.GetLastWin32Error(); |
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var lastErrorHR = Marshal.GetHRForLastWin32Error(); |
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return lastErrorHR; |
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} |
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if (largestID < menuItem.MenuDisplayId) |
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largestID = menuItem.MenuDisplayId; |
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} |
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} |
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|
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Debug.Write("Adding Separator 1", LogCategories.ShellMenu); |
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// Add a separator. |
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/* MENUITEMINFO sep = new MENUITEMINFO(); |
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sep.cbSize = (uint)Marshal.SizeOf(sep); |
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sep.fMask = MIIM.MIIM_TYPE; |
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sep.fType = MFT.MFT_SEPARATOR;*/ |
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if (!NativeMethods.InsertMenu(hMenu, (uint)_items.Values.Count + idCmdFirst+1,MF.MF_SEPARATOR|MF.MF_BYPOSITION, 0, String.Empty)) |
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{ |
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Trace.TraceError("Error adding separator 1\r\n{0}", Marshal.GetLastWin32Error()); |
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return Marshal.GetHRForLastWin32Error(); |
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} |
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|
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|
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|
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|
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Debug.WriteLine("Menus added", LogCategories.ShellOverlays); |
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// Return an HRESULT value with the severity set to SEVERITY_SUCCESS. |
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// Set the code value to the offset of the largest command identifier |
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// that was assigned, plus one (1). |
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return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0, |
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largestID + 1); |
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} |
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|
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/// <summary> |
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/// Carry out the command associated with a shortcut menu item. |
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/// </summary> |
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/// <param name="pici"> |
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/// A pointer to a CMINVOKECOMMANDINFO or CMINVOKECOMMANDINFOEX structure |
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/// containing information about the command. |
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/// </param> |
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public void InvokeCommand(IntPtr pici) |
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{ |
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bool isUnicode = false; |
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|
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// Determine which structure is being passed in, CMINVOKECOMMANDINFO or |
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// CMINVOKECOMMANDINFOEX based on the cbSize member of lpcmi. Although |
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// the lpcmi parameter is declared in Shlobj.h as a CMINVOKECOMMANDINFO |
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// structure, in practice it often points to a CMINVOKECOMMANDINFOEX |
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// structure. This struct is an extended version of CMINVOKECOMMANDINFO |
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// and has additional members that allow Unicode strings to be passed. |
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CMINVOKECOMMANDINFO ici = (CMINVOKECOMMANDINFO)Marshal.PtrToStructure( |
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pici, typeof(CMINVOKECOMMANDINFO)); |
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CMINVOKECOMMANDINFOEX iciex = new CMINVOKECOMMANDINFOEX(); |
412 |
if (ici.cbSize == Marshal.SizeOf(typeof(CMINVOKECOMMANDINFOEX))) |
413 |
{ |
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if ((ici.fMask & CMIC.CMIC_MASK_UNICODE) != 0) |
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{ |
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isUnicode = true; |
417 |
iciex = (CMINVOKECOMMANDINFOEX)Marshal.PtrToStructure(pici, |
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typeof(CMINVOKECOMMANDINFOEX)); |
419 |
} |
420 |
} |
421 |
|
422 |
// Determines whether the command is identified by its offset or verb. |
423 |
// There are two ways to identify commands: |
424 |
// |
425 |
// 1) The command's verb string |
426 |
// 2) The command's identifier offset |
427 |
// |
428 |
// If the high-order word of lpcmi->lpVerb (for the ANSI case) or |
429 |
// lpcmi->lpVerbW (for the Unicode case) is nonzero, lpVerb or lpVerbW |
430 |
// holds a verb string. If the high-order word is zero, the command |
431 |
// offset is in the low-order word of lpcmi->lpVerb. |
432 |
|
433 |
// For the ANSI case, if the high-order word is not zero, the command's |
434 |
// verb string is in lpcmi->lpVerb. |
435 |
if (!isUnicode && NativeMethods.HighWord(ici.verb.ToInt32()) != 0) |
436 |
{ |
437 |
// Is the verb supported by this context menu extension? |
438 |
string verbAnsi = Marshal.PtrToStringAnsi(ici.verb); |
439 |
if (_items.ContainsKey(verbAnsi)) |
440 |
{ |
441 |
_items[verbAnsi].MenuCommand(ici.hwnd); |
442 |
} |
443 |
else |
444 |
{ |
445 |
// If the verb is not recognized by the context menu handler, it |
446 |
// must return E_FAIL to allow it to be passed on to the other |
447 |
// context menu handlers that might implement that verb. |
448 |
Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
449 |
} |
450 |
} |
451 |
|
452 |
// For the Unicode case, if the high-order word is not zero, the |
453 |
// command's verb string is in lpcmi->lpVerbW. |
454 |
else if (isUnicode && NativeMethods.HighWord(iciex.verbW.ToInt32()) != 0) |
455 |
{ |
456 |
// Is the verb supported by this context menu extension? |
457 |
string verbUTF = Marshal.PtrToStringUni(iciex.verbW); |
458 |
if (_items.ContainsKey(verbUTF)) |
459 |
{ |
460 |
_items[verbUTF].MenuCommand(ici.hwnd); |
461 |
} |
462 |
else |
463 |
{ |
464 |
// If the verb is not recognized by the context menu handler, it |
465 |
// must return E_FAIL to allow it to be passed on to the other |
466 |
// context menu handlers that might implement that verb. |
467 |
Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
468 |
} |
469 |
} |
470 |
|
471 |
// If the command cannot be identified through the verb string, then |
472 |
// check the identifier offset. |
473 |
else |
474 |
{ |
475 |
// Is the command identifier offset supported by this context menu |
476 |
// extension? |
477 |
int menuID = NativeMethods.LowWord(ici.verb.ToInt32()); |
478 |
var menuItem = _items.FirstOrDefault(item => item.Value.MenuDisplayId == menuID).Value; |
479 |
if (menuItem != null) |
480 |
{ |
481 |
menuItem.MenuCommand(ici.hwnd); |
482 |
} |
483 |
else |
484 |
{ |
485 |
// If the verb is not recognized by the context menu handler, it |
486 |
// must return E_FAIL to allow it to be passed on to the other |
487 |
// context menu handlers that might implement that verb. |
488 |
Marshal.ThrowExceptionForHR(WinError.E_FAIL); |
489 |
} |
490 |
} |
491 |
} |
492 |
|
493 |
/// <summary> |
494 |
/// Get information about a shortcut menu command, including the help string |
495 |
/// and the language-independent, or canonical, name for the command. |
496 |
/// </summary> |
497 |
/// <param name="idCmd">Menu command identifier offset.</param> |
498 |
/// <param name="uFlags"> |
499 |
/// Flags specifying the information to return. This parameter can have one |
500 |
/// of the following values: GCS_HELPTEXTA, GCS_HELPTEXTW, GCS_VALIDATEA, |
501 |
/// GCS_VALIDATEW, GCS_VERBA, GCS_VERBW. |
502 |
/// </param> |
503 |
/// <param name="pReserved">Reserved. Must be IntPtr.Zero</param> |
504 |
/// <param name="pszName"> |
505 |
/// The address of the buffer to receive the null-terminated string being |
506 |
/// retrieved. |
507 |
/// </param> |
508 |
/// <param name="cchMax"> |
509 |
/// Size of the buffer, in characters, to receive the null-terminated string. |
510 |
/// </param> |
511 |
public void GetCommandString( |
512 |
UIntPtr idCmd, |
513 |
uint uFlags, |
514 |
IntPtr pReserved, |
515 |
StringBuilder pszName, |
516 |
uint cchMax) |
517 |
{ |
518 |
uint menuID = idCmd.ToUInt32(); |
519 |
var menuItem = _items.FirstOrDefault(item => item.Value.MenuDisplayId == menuID).Value; |
520 |
if (menuItem != null) |
521 |
{ |
522 |
switch ((GCS)uFlags) |
523 |
{ |
524 |
case GCS.GCS_VERBW: |
525 |
if (menuItem.VerbCanonicalName.Length > cchMax - 1) |
526 |
{ |
527 |
Marshal.ThrowExceptionForHR(WinError.STRSAFE_E_INSUFFICIENT_BUFFER); |
528 |
} |
529 |
else |
530 |
{ |
531 |
pszName.Clear(); |
532 |
pszName.Append(menuItem.VerbCanonicalName); |
533 |
} |
534 |
break; |
535 |
|
536 |
case GCS.GCS_HELPTEXTW: |
537 |
if (menuItem.VerbHelpText.Length > cchMax - 1) |
538 |
{ |
539 |
Marshal.ThrowExceptionForHR(WinError.STRSAFE_E_INSUFFICIENT_BUFFER); |
540 |
} |
541 |
else |
542 |
{ |
543 |
pszName.Clear(); |
544 |
pszName.Append(menuItem.VerbHelpText); |
545 |
} |
546 |
break; |
547 |
} |
548 |
} |
549 |
} |
550 |
|
551 |
#endregion |
552 |
} |
553 |
} |