private string GetActiveWindowTitle()
{
const int capacity = 256;
StringBuilder content = null;
IntPtr handle = IntPtr.Zero;
try
{
content = new StringBuilder(capacity);
handle = SharpClipboardInstance.ForegroundWindowHandle();
}
catch (Exception) { }
if (GetWindowText(handle, content, capacity) > 0)
{
return(content.ToString());
}
return(null);
}
/// <summary>
/// This is the main clipboard detection method.
/// Algorithmic customizations are most welcome.
/// </summary>
/// <param name="m">The processed window-reference message.</param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
switch (m.Msg)
{
case WM_DRAWCLIPBOARD:
// If clipboard-monitoring is enabled, proceed to listening.
if (Ready && SharpClipboardInstance.MonitorClipboard)
{
IDataObject dataObj;
int retryCount = 0;
while (true)
{
try
{
dataObj = Clipboard.GetDataObject();
break;
}
catch (ExternalException)
{
// Crashes when large data is copied from clipboard
// without retries. We'll therefore need to do a 5-step
// retry count to cut some slack for the operation to
// fully complete and ensure that the data is captured;
// if all else fails, then throw an exception.
// You may extend the retries if need be.
if (++retryCount > 5)
{
throw;
}
System.Threading.Thread.Sleep(100);
}
}
try
{
// Determines whether a file/files have been cut/copied.
if ((SharpClipboardInstance.ObservableFormats.Files == true) &&
(dataObj.GetDataPresent(DataFormats.FileDrop)))
{
string[] capturedFiles = (string[])dataObj.GetData(DataFormats.FileDrop);
// If the 'capturedFiles' string array persists as null, then this means
// that the copied content is of a complex object type since the file-drop
// format is able to capture more-than-just-file content in the clipboard.
// Therefore assign the content its rightful type.
if (capturedFiles == null)
{
SharpClipboardInstance.ClipboardObject = dataObj;
SharpClipboardInstance.ClipboardText = dataObj.GetData(DataFormats.UnicodeText).ToString();
SharpClipboardInstance.Invoke(dataObj, SharpClipboard.ContentTypes.Other,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
else
{
// Clear all existing files before update.
SharpClipboardInstance.ClipboardFiles.Clear();
SharpClipboardInstance.ClipboardFiles.AddRange(capturedFiles);
SharpClipboardInstance.ClipboardFile = capturedFiles[0];
SharpClipboardInstance.Invoke(capturedFiles, SharpClipboard.ContentTypes.Files,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
}
// Determines whether text has been cut/copied.
else if ((SharpClipboardInstance.ObservableFormats.Texts == true) &&
(dataObj.GetDataPresent(DataFormats.Text) || dataObj.GetDataPresent(DataFormats.UnicodeText)))
{
string capturedText = dataObj.GetData(DataFormats.UnicodeText).ToString();
SharpClipboardInstance.ClipboardText = capturedText;
SharpClipboardInstance.Invoke(capturedText, SharpClipboard.ContentTypes.Text,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
// Determines whether an image has been cut/copied.
else if ((SharpClipboardInstance.ObservableFormats.Images == true) &&
(dataObj.GetDataPresent(DataFormats.Bitmap)))
{
Image capturedImage = dataObj.GetData(DataFormats.Bitmap) as Image;
SharpClipboardInstance.ClipboardImage = capturedImage;
SharpClipboardInstance.Invoke(capturedImage, SharpClipboard.ContentTypes.Image,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
// Determines whether a complex object has been cut/copied.
else if ((SharpClipboardInstance.ObservableFormats.Others == true) &&
!(dataObj.GetDataPresent(DataFormats.FileDrop)))
{
SharpClipboardInstance.Invoke(dataObj, SharpClipboard.ContentTypes.Other,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
}
catch (AccessViolationException)
{
// Use-cases such as Remote Desktop usage might throw this exception.
// Applications with Administrative privileges can however override
// this exception when run in a production environment.
}
catch (NullReferenceException) { }
}
// Provides support for multi-instance clipboard monitoring.
SendMessage(_chainedWnd, m.Msg, m.WParam, m.LParam);
break;
case WM_CHANGECBCHAIN:
if (m.WParam == _chainedWnd)
{
_chainedWnd = m.LParam;
}
else
{
SendMessage(_chainedWnd, m.Msg, m.WParam, m.LParam);
}
break;
}
}
/// <summary>
/// This is the main clipboard detection method.
/// Algorithmic customizations are most welcome.
/// </summary>
/// <param name="m">The processed window-reference message.</param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
switch (m.Msg)
{
case WM_DRAWCLIPBOARD:
// If clipboard-monitoring is enabled, proceed to listening.
if (Ready && SharpClipboardInstance.MonitorClipboard)
{
IDataObject dataObj = Clipboard.GetDataObject();
// Determines whether a file/files have been cut/copied.
if ((SharpClipboardInstance.ObservableFormats.Files == true) &&
(dataObj.GetDataPresent(DataFormats.FileDrop)))
{
string[] capturedFiles = (string[])dataObj.GetData(DataFormats.FileDrop);
// If the 'capturedFiles' string array persists as null, then it means
// that the copied content is of a complex object-type since the file-drop
// format is able to capture more-than-just-file content in the clipboard.
// Assign the content its rightful content-type.
if (capturedFiles == null)
{
SharpClipboardInstance.ClipboardObject = dataObj;
SharpClipboardInstance.ClipboardText = dataObj.GetData(DataFormats.UnicodeText).ToString();
SharpClipboardInstance.Invoke(dataObj, SharpClipboard.ContentTypes.Other,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
else
{
SharpClipboardInstance.ClipboardFiles.AddRange(capturedFiles);
SharpClipboardInstance.ClipboardFile = capturedFiles[0];
SharpClipboardInstance.Invoke(capturedFiles, SharpClipboard.ContentTypes.Files,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
}
// Determines whether text has been cut/copied.
else if ((SharpClipboardInstance.ObservableFormats.Texts == true) &&
(dataObj.GetDataPresent(DataFormats.Text) || dataObj.GetDataPresent(DataFormats.UnicodeText)))
{
string capturedText = dataObj.GetData(DataFormats.UnicodeText).ToString();
SharpClipboardInstance.ClipboardText = capturedText;
SharpClipboardInstance.Invoke(capturedText, SharpClipboard.ContentTypes.Text,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
// Determines whether an image has been cut/copied.
else if ((SharpClipboardInstance.ObservableFormats.Images == true) &&
(dataObj.GetDataPresent(DataFormats.Bitmap)))
{
Image capturedImage = dataObj.GetData(DataFormats.Bitmap) as Image;
SharpClipboardInstance.ClipboardImage = capturedImage;
SharpClipboardInstance.Invoke(capturedImage, SharpClipboard.ContentTypes.Image,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
else
{
SharpClipboardInstance.Invoke(dataObj, SharpClipboard.ContentTypes.Other,
new SourceApplication(GetForegroundWindow(), SharpClipboardInstance.ForegroundWindowHandle(),
GetApplicationName(), GetActiveWindowTitle(), GetApplicationPath()));
}
}
break;
case WM_CHANGECBCHAIN:
if (m.WParam == _chainedWnd)
{
_chainedWnd = m.LParam;
}
else
{
SendMessage(_chainedWnd, m.Msg, m.WParam, m.LParam);
}
break;
}
}