/// <summary>
/// Safely clear the clipboard. The clipboard clearing method of the
/// .NET framework sets the clipboard to an empty <c>DataObject</c> when
/// invoking the clearing method -- this might cause incompatibilities
/// with other applications. Therefore, the <c>Clear</c> method of
/// <c>ClipboardUtil</c> first tries to clear the clipboard using
/// native Windows functions (which *really* clear the clipboard).
/// </summary>
public static void Clear()
{
bool bNativeSuccess = false;
try
{
if (!NativeLib.IsUnix()) // Windows
{
if (OpenW(IntPtr.Zero, true)) // Clears the clipboard
{
CloseW();
bNativeSuccess = true;
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
SetStringM(string.Empty);
bNativeSuccess = true;
}
else if (NativeLib.IsUnix())
{
SetStringU(string.Empty);
bNativeSuccess = true;
}
}
catch (Exception) { Debug.Assert(false); }
if (bNativeSuccess)
{
return;
}
try { Clipboard.Clear(); } // Fallback to .NET framework method
catch (Exception) { Debug.Assert(false); }
}
/// <summary>
/// Safely clear the clipboard. The clipboard clearing method
/// of the .NET Framework stores an empty <c>DataObject</c>
/// in the clipboard; this can cause incompatibilities with
/// other applications. Therefore, the <c>Clear</c> method of
/// <c>ClipboardUtil</c> first tries to clear the clipboard using
/// native Windows functions (which *really* clear the clipboard).
/// </summary>
public static void Clear()
{
// Ensure that there's no infinite recursion
if (!g_csClearing.TryEnter())
{
Debug.Assert(false); return;
}
// In some situations (e.g. when running in a VM, when using
// a clipboard extension utility, ...) the clipboard cannot
// be cleared; for this case we first overwrite the clipboard
// with a non-sensitive text
try { Copy("--", false, false, null, null, IntPtr.Zero); }
catch (Exception) { Debug.Assert(false); }
bool bNativeSuccess = false;
try
{
if (!NativeLib.IsUnix()) // Windows
{
if (OpenW(IntPtr.Zero, true)) // Clears the clipboard
{
CloseW();
bNativeSuccess = true;
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
SetStringM(string.Empty);
bNativeSuccess = true;
}
else if (NativeLib.IsUnix())
{
SetStringU(string.Empty);
bNativeSuccess = true;
}
}
catch (Exception) { Debug.Assert(false); }
g_pbDataHash = null;
g_csClearing.Exit();
if (bNativeSuccess)
{
return;
}
Debug.Assert(false);
try { Clipboard.Clear(); } // Fallback; empty data object
catch (Exception) { Debug.Assert(false); }
}
private static byte[] HashClipboard()
{
try
{
SHA256Managed sha256 = new SHA256Managed();
if (m_strFormat != null)
{
if (ContainsData(m_strFormat))
{
byte[] pbData;
if (m_bEncoded)
{
pbData = GetEncodedData(m_strFormat, IntPtr.Zero);
}
else
{
pbData = GetData(m_strFormat);
}
if (pbData == null)
{
Debug.Assert(false); return(null);
}
return(sha256.ComputeHash(pbData));
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
string strData = GetStringM();
byte[] pbUtf8 = StrUtil.Utf8.GetBytes(strData);
return(sha256.ComputeHash(pbUtf8));
}
else if (NativeLib.IsUnix())
{
string strData = GetStringU();
byte[] pbUtf8 = StrUtil.Utf8.GetBytes(strData);
return(sha256.ComputeHash(pbUtf8));
}
else if (Clipboard.ContainsText())
{
string strData = Clipboard.GetText();
byte[] pbUtf8 = StrUtil.Utf8.GetBytes(strData);
return(sha256.ComputeHash(pbUtf8));
}
}
catch (Exception) { Debug.Assert(false); }
return(null);
}
public static string GetText()
{
if (!NativeLib.IsUnix()) // Windows
{
return(Clipboard.GetText());
}
if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
return(GetStringM());
}
if (NativeLib.IsUnix())
{
return(GetStringU());
}
Debug.Assert(false);
return(Clipboard.GetText());
}
public static byte[] GetEncodedData(string strFormat, IntPtr hOwner)
{
try
{
if (!NativeLib.IsUnix()) // Windows
{
if (!OpenW(hOwner, false))
{
throw new InvalidOperationException();
}
string str = GetStringW(strFormat, false);
CloseW();
if (str == null)
{
return(null);
}
if (str.Length == 0)
{
return(new byte[0]);
}
return(StrUtil.DataUriToData(str));
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
return(StrUtil.DataUriToData(GetStringM()));
}
else if (NativeLib.IsUnix())
{
return(StrUtil.DataUriToData(GetStringU()));
}
// else // Managed, no encoding
// {
// return GetData(strFormat);
// }
}
catch (Exception) { Debug.Assert(false); }
return(null);
}
public static bool Copy(string strToCopy, bool bSprCompile, bool bIsEntryInfo,
PwEntry peEntryInfo, PwDatabase pwReferenceSource, IntPtr hOwner)
{
if (strToCopy == null)
{
throw new ArgumentNullException("strToCopy");
}
if (bIsEntryInfo && !AppPolicy.Try(AppPolicyId.CopyToClipboard))
{
return(false);
}
string strData = (bSprCompile ? SprEngine.Compile(strToCopy,
new SprContext(peEntryInfo, pwReferenceSource,
SprCompileFlags.All)) : strToCopy);
try
{
if (!NativeLib.IsUnix()) // Windows
{
if (!OpenW(hOwner, true))
{
throw new InvalidOperationException();
}
bool bFailed = false;
if (!AttachIgnoreFormatW())
{
bFailed = true;
}
if (!SetDataW(null, strData, null))
{
bFailed = true;
}
CloseW();
if (bFailed)
{
return(false);
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
SetStringM(strData);
}
else if (NativeLib.IsUnix())
{
SetStringU(strData);
}
// else // Managed
// {
// Clear();
// DataObject doData = CreateProtectedDataObject(strData);
// Clipboard.SetDataObject(doData);
// }
}
catch (Exception) { Debug.Assert(false); return(false); }
m_strFormat = null;
byte[] pbUtf8 = StrUtil.Utf8.GetBytes(strData);
SHA256Managed sha256 = new SHA256Managed();
m_pbDataHash32 = sha256.ComputeHash(pbUtf8);
RaiseCopyEvent(bIsEntryInfo, strData);
if (peEntryInfo != null)
{
peEntryInfo.Touch(false);
}
// SprEngine.Compile might have modified the database
Program.MainForm.UpdateUI(false, null, false, null, false, null, false);
return(true);
}
public static byte[] ComputeHash()
{
try // This works always or never
{
bool bOpened = OpenW(IntPtr.Zero, false);
// The following seems to work even without opening the
// clipboard, but opening maybe is safer
uint u = NativeMethods.GetClipboardSequenceNumber();
if (bOpened)
{
CloseW();
}
if (u == 0)
{
throw new UnauthorizedAccessException();
}
SHA256Managed sha256 = new SHA256Managed();
return(sha256.ComputeHash(MemUtil.UInt32ToBytes(u)));
}
catch (Exception) { Debug.Assert(false); }
if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
string str = GetStringM();
byte[] pbText = StrUtil.Utf8.GetBytes("pb" + str);
return((new SHA256Managed()).ComputeHash(pbText));
}
if (NativeLib.IsUnix())
{
string str = GetStringU();
byte[] pbText = StrUtil.Utf8.GetBytes("pb" + str);
return((new SHA256Managed()).ComputeHash(pbText));
}
try
{
MemoryStream ms = new MemoryStream();
byte[] pbPre = StrUtil.Utf8.GetBytes("pb");
ms.Write(pbPre, 0, pbPre.Length); // Prevent empty buffer
if (Clipboard.ContainsAudio())
{
Stream sAudio = Clipboard.GetAudioStream();
MemUtil.CopyStream(sAudio, ms);
sAudio.Close();
}
if (Clipboard.ContainsFileDropList())
{
StringCollection sc = Clipboard.GetFileDropList();
foreach (string str in sc)
{
byte[] pbStr = StrUtil.Utf8.GetBytes(str);
ms.Write(pbStr, 0, pbStr.Length);
}
}
if (Clipboard.ContainsImage())
{
using (Image img = Clipboard.GetImage())
{
MemoryStream msImage = new MemoryStream();
img.Save(msImage, ImageFormat.Bmp);
byte[] pbImg = msImage.ToArray();
ms.Write(pbImg, 0, pbImg.Length);
msImage.Close();
}
}
if (Clipboard.ContainsText())
{
string str = Clipboard.GetText();
byte[] pbText = StrUtil.Utf8.GetBytes(str);
ms.Write(pbText, 0, pbText.Length);
}
byte[] pbData = ms.ToArray();
SHA256Managed sha256 = new SHA256Managed();
byte[] pbHash = sha256.ComputeHash(pbData);
ms.Close();
return(pbHash);
}
catch (Exception) { Debug.Assert(false); }
return(null);
}
public static bool Copy(byte[] pbToCopy, string strFormat, bool bEncode,
bool bIsEntryInfo, IntPtr hOwner)
{
Debug.Assert(pbToCopy != null);
if (pbToCopy == null)
{
throw new ArgumentNullException("pbToCopy");
}
if (bIsEntryInfo && !AppPolicy.Try(AppPolicyId.CopyToClipboard))
{
return(false);
}
string strEnc = null;
try
{
if (bEncode || NativeLib.IsUnix())
{
strEnc = StrUtil.DataToDataUri(pbToCopy,
ClipFmtToMimeType(strFormat));
}
if (!NativeLib.IsUnix()) // Windows
{
if (!OpenW(hOwner, true))
{
throw new InvalidOperationException();
}
uint uFormat = NativeMethods.RegisterClipboardFormat(strFormat);
bool bFailed = false;
if (!AttachIgnoreFormatW())
{
bFailed = true;
}
if (!bEncode)
{
if (!SetDataW(uFormat, pbToCopy))
{
bFailed = true;
}
}
else // Encode
{
if (!SetDataW(uFormat, strEnc, false))
{
bFailed = true;
}
}
CloseW();
if (bFailed)
{
return(false);
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
SetStringM(strEnc);
}
else if (NativeLib.IsUnix())
{
SetStringU(strEnc);
}
// else // Managed, no encoding
// {
// Clear();
// DataObject doData = CreateProtectedDataObject(strFormat, pbToCopy);
// Clipboard.SetDataObject(doData);
// }
}
catch (Exception) { Debug.Assert(false); return(false); }
m_strFormat = strFormat;
m_bEncoded = (strEnc != null);
SHA256Managed sha256 = new SHA256Managed();
// if(strEnc != null)
// m_pbDataHash32 = sha256.ComputeHash(StrUtil.Utf8.GetBytes(strEnc));
// else
m_pbDataHash32 = sha256.ComputeHash(pbToCopy);
RaiseCopyEvent(bIsEntryInfo, string.Empty);
return(true);
}
public static bool Copy(string strToCopy, bool bSprCompile, bool bIsEntryInfo,
PwEntry peEntryInfo, PwDatabase pwReferenceSource, IntPtr hOwner)
{
if (strToCopy == null)
{
throw new ArgumentNullException("strToCopy");
}
if (strToCopy.Length == 0)
{
Clear(); return(true);
}
if (bIsEntryInfo && !AppPolicy.Try(AppPolicyId.CopyToClipboard))
{
return(false);
}
string strData = strToCopy;
if (bSprCompile)
{
strData = SprEngine.Compile(strData, new SprContext(
peEntryInfo, pwReferenceSource, SprCompileFlags.All));
}
try
{
// if(SetStringUwp(strData)) { } else
if (!NativeLib.IsUnix()) // Windows
{
if (!OpenW(hOwner, true))
{
throw new InvalidOperationException();
}
bool bFailed = false;
if (!AttachIgnoreFormatsW())
{
bFailed = true;
}
if (!SetDataW(null, strData, null))
{
bFailed = true;
}
CloseW();
if (bFailed)
{
return(false);
}
}
else if (NativeLib.GetPlatformID() == PlatformID.MacOSX)
{
SetStringM(strData);
}
else if (NativeLib.IsUnix())
{
SetStringU(strData);
}
else
{
Debug.Assert(false);
Clipboard.SetText(strData);
}
}
catch (Exception) { Debug.Assert(false); return(false); }
g_pbDataHash = HashString(strData);
if (peEntryInfo != null)
{
peEntryInfo.Touch(false);
}
if (bIsEntryInfo)
{
Program.TriggerSystem.RaiseEvent(EcasEventIDs.CopiedEntryInfo,
EcasProperty.Text, strData);
}
// SprEngine.Compile might have modified the database
MainForm mf = Program.MainForm;
if ((mf != null) && bSprCompile)
{
mf.RefreshEntriesList();
mf.UpdateUI(false, null, false, null, false, null, false);
}
return(true);
}
