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234 lines
9.2 KiB
C#
234 lines
9.2 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Threading;
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using System.Windows.Forms;
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namespace Wox.Plugin.Clipboard
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{
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public static class ClipboardMonitor
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{
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public delegate void OnClipboardChangeEventHandler(ClipboardFormat format, object data);
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public static event OnClipboardChangeEventHandler OnClipboardChange;
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public static void Start()
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{
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ClipboardWatcher.Start();
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ClipboardWatcher.OnClipboardChange += (ClipboardFormat format, object data) =>
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{
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if (OnClipboardChange != null)
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OnClipboardChange(format, data);
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};
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}
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public static void Stop()
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{
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OnClipboardChange = null;
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ClipboardWatcher.Stop();
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}
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class ClipboardWatcher : Form
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{
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// static instance of this form
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private static ClipboardWatcher mInstance;
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// needed to dispose this form
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static IntPtr nextClipboardViewer;
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public delegate void OnClipboardChangeEventHandler(ClipboardFormat format, object data);
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public static event OnClipboardChangeEventHandler OnClipboardChange;
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// start listening
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public static void Start()
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{
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// we can only have one instance if this class
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if (mInstance != null)
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return;
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Thread t = new Thread(new ParameterizedThreadStart(x =>
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{
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Application.Run(new ClipboardWatcher());
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}));
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t.SetApartmentState(ApartmentState.STA); // give the [STAThread] attribute
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t.Start();
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}
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// stop listening (dispose form)
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public static void Stop()
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{
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mInstance.Invoke(new MethodInvoker(() =>
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{
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ChangeClipboardChain(mInstance.Handle, nextClipboardViewer);
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}));
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mInstance.Invoke(new MethodInvoker(mInstance.Close));
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mInstance.Dispose();
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mInstance = null;
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}
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// on load: (hide this window)
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protected override void SetVisibleCore(bool value)
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{
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CreateHandle();
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mInstance = this;
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nextClipboardViewer = SetClipboardViewer(mInstance.Handle);
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base.SetVisibleCore(false);
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}
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[DllImport("User32.dll", CharSet = CharSet.Auto)]
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public static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);
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[DllImport("User32.dll", CharSet = CharSet.Auto)]
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public static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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public static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);
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// defined in winuser.h
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const int WM_DRAWCLIPBOARD = 0x308;
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const int WM_CHANGECBCHAIN = 0x030D;
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protected override void WndProc(ref Message m)
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{
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switch (m.Msg)
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{
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case WM_DRAWCLIPBOARD:
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ClipChanged();
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SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
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break;
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case WM_CHANGECBCHAIN:
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if (m.WParam == nextClipboardViewer)
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nextClipboardViewer = m.LParam;
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else
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SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
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break;
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default:
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base.WndProc(ref m);
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break;
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}
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}
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static readonly string[] formats = Enum.GetNames(typeof(ClipboardFormat));
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private void ClipChanged()
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{
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IDataObject iData = System.Windows.Forms.Clipboard.GetDataObject();
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ClipboardFormat? format = null;
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foreach (var f in formats)
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{
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if (iData.GetDataPresent(f))
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{
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format = (ClipboardFormat)Enum.Parse(typeof(ClipboardFormat), f);
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break;
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}
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}
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object data = iData.GetData(format.ToString());
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if (data == null || format == null)
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return;
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if (OnClipboardChange != null)
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OnClipboardChange((ClipboardFormat)format, data);
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}
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}
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}
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public enum ClipboardFormat : byte
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{
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/// <summary>Specifies the standard ANSI text format. This static field is read-only.
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/// </summary>
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/// <filterpriority>1</filterpriority>
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Text,
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/// <summary>Specifies the standard Windows Unicode text format. This static field
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/// is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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UnicodeText,
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/// <summary>Specifies the Windows device-independent bitmap (DIB) format. This static
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/// field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Dib,
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/// <summary>Specifies a Windows bitmap format. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Bitmap,
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/// <summary>Specifies the Windows enhanced metafile format. This static field is
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/// read-only.</summary>
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/// <filterpriority>1</filterpriority>
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EnhancedMetafile,
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/// <summary>Specifies the Windows metafile format, which Windows Forms does not
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/// directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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MetafilePict,
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/// <summary>Specifies the Windows symbolic link format, which Windows Forms does
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/// not directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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SymbolicLink,
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/// <summary>Specifies the Windows Data Interchange Format (DIF), which Windows Forms
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/// does not directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Dif,
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/// <summary>Specifies the Tagged Image File Format (TIFF), which Windows Forms does
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/// not directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Tiff,
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/// <summary>Specifies the standard Windows original equipment manufacturer (OEM)
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/// text format. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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OemText,
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/// <summary>Specifies the Windows palette format. This static field is read-only.
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/// </summary>
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/// <filterpriority>1</filterpriority>
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Palette,
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/// <summary>Specifies the Windows pen data format, which consists of pen strokes
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/// for handwriting software, Windows Forms does not use this format. This static
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/// field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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PenData,
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/// <summary>Specifies the Resource Interchange File Format (RIFF) audio format,
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/// which Windows Forms does not directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Riff,
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/// <summary>Specifies the wave audio format, which Windows Forms does not directly
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/// use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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WaveAudio,
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/// <summary>Specifies the Windows file drop format, which Windows Forms does not
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/// directly use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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FileDrop,
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/// <summary>Specifies the Windows culture format, which Windows Forms does not directly
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/// use. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Locale,
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/// <summary>Specifies text consisting of HTML data. This static field is read-only.
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/// </summary>
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/// <filterpriority>1</filterpriority>
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Html,
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/// <summary>Specifies text consisting of Rich Text Format (RTF) data. This static
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/// field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Rtf,
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/// <summary>Specifies a comma-separated value (CSV) format, which is a common interchange
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/// format used by spreadsheets. This format is not used directly by Windows Forms.
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/// This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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CommaSeparatedValue,
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/// <summary>Specifies the Windows Forms string class format, which Windows Forms
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/// uses to store string objects. This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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StringFormat,
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/// <summary>Specifies a format that encapsulates any type of Windows Forms object.
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/// This static field is read-only.</summary>
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/// <filterpriority>1</filterpriority>
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Serializable,
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}
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} |