/// <summary>
/// Gets the selected text of the given window, or the last activate window.
/// </summary>
/// <param name="sendKeys">The <c>SendKeys.SendWait</c> method.</param>
/// <param name="windowHandle">The window.</param>
/// <returns>The selected text.</returns>
public async Task GetSelectedText(Action <string> sendKeys, IntPtr?windowHandle = null)
{
IntPtr hwnd = windowHandle ?? this.lastWindow;
await Task.Run(() =>
{
if (hwnd != IntPtr.Zero)
{
// Activate the window, if it's not already.
IntPtr active = WindowsApi.GetForegroundWindow();
if (active != hwnd)
{
this.gotActiveWindow.Reset();
WindowsApi.SetForegroundWindow(hwnd);
// Wait for it to be activated.
this.gotActiveWindow.WaitOne(3000);
}
}
// Copy the selected text to clipboard
this.gotClipboard.Reset();
sendKeys("^c");
// Wait for the clipboard update.
this.gotClipboard.WaitOne(3000);
});
return;
}
/// <summary>
/// Activates a window, does not return until it is activated.
/// </summary>
/// <param name="hwnd">The handle of the window to activate.</param>
private void ActivateWindow(IntPtr hwnd)
{
if (hwnd != IntPtr.Zero)
{
// Activate the window, if it's not already.
IntPtr active = WindowsApi.GetForegroundWindow();
if (active != hwnd)
{
// Wait for it to be activated. For unknown reasons, activating the window the first time causes
// no window to be activated. The second attempt works.
const int timeout = 2000;
int start = Environment.TickCount;
int timespent = 0;
do
{
WindowsApi.SetForegroundWindow(hwnd);
this.activeWindowChanged.Reset();
this.activeWindowChanged.WaitOne(timeout - timespent);
timespent = Environment.TickCount - start;
} while (this.activeWindow != hwnd && timespent <= timeout);
}
}
}
