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Added BindCtx support for WIN32_FIND_DATA "simple parsing" and optional object parameters.

pull/303/head
dahall 2022-06-14 09:59:51 -06:00
parent dec0bb3cc0
commit 393ee76ce9
1 changed files with 63 additions and 4 deletions
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67
Windows.Shell.Common/BindContext.cs
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@ -7,11 +7,12 @@ using Vanara.Extensions;
using Vanara.Extensions.Reflection;
using Vanara.PInvoke;
using static Vanara.PInvoke.Ole32;
using static Vanara.PInvoke.Shell32;
namespace Vanara.Windows.Shell
{
/// <summary>Wraps the <see cref="IBindCtx"/> COM type.</summary>
/// <seealso cref="System.IDisposable"/>
/// <seealso cref="IDisposable"/>
[ComVisible(true)]
public class BindContext : IDisposable, IBindCtxV, IBindCtx
{
@ -40,6 +41,18 @@ namespace Vanara.Windows.Shell
iBindCtx.SetBindOptions(opts);
}
/// <summary>
/// Initializes a new instance of the <see cref="BindContext"/> class with system file information to enable "simple parsing" which
/// avoids having to access the file. This avoids the expense of getting the information from the file and allows for parsing items
/// that may not necessarily exist.
/// </summary>
/// <param name="findData">The system file information as a <see cref="WIN32_FIND_DATA"/> structure.</param>
public BindContext(in WIN32_FIND_DATA findData) : this(STGM.STGM_CREATE)
{
var pfsbd = new CFileSysBindData(findData);
RegisterObjectParam(STR_FILE_SYS_BIND_DATA, pfsbd);
}
/// <summary>Flags that control aspects of moniker binding operations.</summary>
public BIND_FLAGS BindFlags
{
@ -111,9 +124,9 @@ namespace Vanara.Windows.Shell
/// </para>
/// <para>COM's file moniker implementation uses the shell link mechanism to reestablish links and passes these flags to IShellLink::Resolve.</para>
/// </summary>
public Shell32.SLR_FLAGS TrackFlags
public SLR_FLAGS TrackFlags
{
get => (Shell32.SLR_FLAGS)GetOptionValue<uint>(nameof(BIND_OPTS2.dwTrackFlags));
get => (SLR_FLAGS)GetOptionValue<uint>(nameof(BIND_OPTS2.dwTrackFlags));
set => SetOptionValue(nameof(BIND_OPTS2.dwTrackFlags), (uint)value);
}
@ -661,7 +674,8 @@ namespace Vanara.Windows.Shell
/// </item>
/// </list>
/// </remarks>
HRESULT IBindCtxV.RegisterObjectParam([MarshalAs(UnmanagedType.LPWStr)] string pszKey, [In, MarshalAs(UnmanagedType.Interface)] object punk) => iBindCtx.RegisterObjectParam(pszKey, punk);
HRESULT IBindCtxV.RegisterObjectParam([MarshalAs(UnmanagedType.LPWStr)] string pszKey, [In, MarshalAs(UnmanagedType.Interface)] object punk) =>
iBindCtx.RegisterObjectParam(pszKey, punk ?? new CDummyUnknown(Guid.Empty));
/// <summary>Releases all pointers to all objects that were previously registered by calls to RegisterObjectBound.</summary>
/// <returns>If this method succeeds, it returns <c>S_OK</c>. Otherwise, it returns an <c>HRESULT</c> error code.</returns>
@ -877,5 +891,50 @@ namespace Vanara.Windows.Shell
bo.SetFieldValue(fieldName, value);
((IBindCtxV)this).SetBindOptions(bo).ThrowIfFailed();
}
[ComVisible(true)]
private class CDummyUnknown : IPersist
{
private Guid _clsid;
public CDummyUnknown(in Guid clsid) => _clsid = clsid;
public Guid GetClassID() => _clsid;
}
[ComVisible(true)]
private class CFileSysBindData : IFileSystemBindData, IFileSystemBindData2
{
// file system bind data is a parameter passed to IShellFolder::ParseDisplayName() to provide the item information to the file system
// data source. this will enable parsing of items that do not exist and avoiding accessing the disk in the parse operation {fc0a77e6-9d70-4258-9783-6dab1d0fe31e}
private static readonly Guid CLSID_UnknownJunction = new(0xfc0a77e6, 0x9d70, 0x4258, 0x97, 0x83, 0x6d, 0xab, 0x1d, 0x0f, 0xe3, 0x1e);
private Guid _clsidJunction = CLSID_UnknownJunction;
private WIN32_FIND_DATA _fd;
private long _liFileID;
public CFileSysBindData(in WIN32_FIND_DATA pfd) => SetFindData(pfd);
public HRESULT GetFileID(out long pliFileID) { pliFileID = _liFileID; return HRESULT.S_OK; }
public HRESULT GetFindData(out WIN32_FIND_DATA pfd) { pfd = _fd; return HRESULT.S_OK; }
public HRESULT GetJunctionCLSID(out Guid pclsid)
{
if (_clsidJunction != CLSID_UnknownJunction)
{
pclsid = _clsidJunction;
return HRESULT.S_OK;
}
pclsid = Guid.Empty;
return HRESULT.E_FAIL;
}
public HRESULT SetFileID(long liFileID) { _liFileID = liFileID; return HRESULT.S_OK; }
public HRESULT SetFindData(in WIN32_FIND_DATA pfd) { _fd = pfd; return HRESULT.S_OK; }
public HRESULT SetJunctionCLSID(in Guid clsid) { _clsidJunction = clsid; return HRESULT.S_OK; }
}
}
}