mirror of
https://gitee.com/csharpui/CPF.git
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323 lines
12 KiB
C#
323 lines
12 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using CPF.Input;
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using System.Threading.Tasks;
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using System.Linq;
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using static CPF.Linux.XLib;
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using System.Runtime.InteropServices;
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namespace CPF.Linux
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{
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class X11Clipboard : IClipboard
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{
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private readonly X11Info _x11;
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private string _storedString;
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private string _storedHtml;
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private XWindow window;
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private CancelHandle _requestedFormatsHandle;
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private CancelHandle _requestedTextHandle;
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private readonly IntPtr[] _textAtoms;
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public X11Clipboard()
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{
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_x11 = LinuxPlatform.Platform.Info;
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window = new XWindow { EventAction = OnXEvent };
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//_saveTargetsAtom = XInternAtom(_x11.Display, "PENGUIN", false);
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_textAtoms = new[]
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{
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_x11.Atoms.XA_STRING,
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_x11.Atoms.OEMTEXT,
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_x11.Atoms.UTF8_STRING,
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_x11.Atoms.UTF16_STRING
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}.Where(a => a != IntPtr.Zero).ToArray();
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}
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void OnXEvent(ref XEvent ev)
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{
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if (ev.type == XEventName.SelectionRequest)
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{
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var sel = ev.SelectionRequestEvent;
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var resp = new XEvent
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{
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SelectionEvent =
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{
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type = XEventName.SelectionNotify,
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send_event = true,
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display = _x11.Display,
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selection = sel.selection,
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target = sel.target,
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requestor = sel.requestor,
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time = sel.time,
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property = IntPtr.Zero
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}
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};
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if (sel.selection == _x11.Atoms.CLIPBOARD)
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{
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resp.SelectionEvent.property = WriteTargetToProperty(sel.target, sel.requestor, sel.property);
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}
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XSendEvent(_x11.Display, sel.requestor, false, new IntPtr((int)EventMask.NoEventMask), ref resp);
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XFlush(_x11.Display);
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}
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}
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Encoding GetStringEncoding(IntPtr atom)
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{
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return (atom == _x11.Atoms.XA_STRING
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|| atom == _x11.Atoms.OEMTEXT)
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? Encoding.ASCII
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: atom == _x11.Atoms.UTF8_STRING
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? Encoding.UTF8
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: atom == _x11.Atoms.UTF16_STRING
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? Encoding.Unicode
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: null;
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}
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unsafe IntPtr WriteTargetToProperty(IntPtr target, IntPtr window, IntPtr property)
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{
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Encoding textEnc;
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if (target == _x11.Atoms.TARGETS)
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{
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var atoms = _textAtoms;
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atoms = atoms.Concat(new[] { _x11.Atoms.TARGETS, _x11.Atoms.MULTIPLE })
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.ToArray();
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if (!string.IsNullOrEmpty(_storedHtml))
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{
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atoms = atoms.Concat(new[] { DataObject.htmlAtom })
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.ToArray();
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}
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XChangeProperty(_x11.Display, window, property, _x11.Atoms.XA_ATOM, 32, PropertyMode.Replace, atoms, atoms.Length);
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return property;
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}
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else if (target == _x11.Atoms.SAVE_TARGETS && _x11.Atoms.SAVE_TARGETS != IntPtr.Zero)
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{
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return property;
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}
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else if ((textEnc = GetStringEncoding(target)) != null)
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{
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var data = textEnc.GetBytes(_storedString ?? "");
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//var ptr = Marshal.AllocHGlobal(data.Length);
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//Marshal.Copy(data, 0, ptr, data.Length);
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//XChangeProperty(_x11.Display, window, property, target, 8,
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// PropertyMode.Replace,
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// (void*)ptr, data.Length);
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fixed (void* pdata = data)
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XChangeProperty(_x11.Display, window, property, target, 8,
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PropertyMode.Replace,
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pdata, data.Length);
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return property;
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}
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else if (target == _x11.Atoms.MULTIPLE && _x11.Atoms.MULTIPLE != IntPtr.Zero)
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{
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XGetWindowProperty(_x11.Display, window, property, IntPtr.Zero, new IntPtr(0x7fffffff), false,
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_x11.Atoms.ATOM_PAIR, out _, out var actualFormat, out var nitems, out _, out var prop);
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if (nitems == IntPtr.Zero)
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return IntPtr.Zero;
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if (actualFormat == 32)
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{
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var data = (IntPtr*)prop.ToPointer();
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for (var c = 0; c < nitems.ToInt32(); c += 2)
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{
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var subTarget = data[c];
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var subProp = data[c + 1];
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var converted = WriteTargetToProperty(subTarget, window, subProp);
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data[c + 1] = converted;
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}
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XChangeProperty(_x11.Display, window, property, _x11.Atoms.ATOM_PAIR, 32, PropertyMode.Replace,
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prop.ToPointer(), nitems.ToInt32());
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}
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XFree(prop);
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return property;
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}
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else if (target == DataObject.htmlAtom)
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{
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var data = Encoding.UTF8.GetBytes(_storedHtml ?? "");
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fixed (void* pdata = data)
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XChangeProperty(_x11.Display, window, property, target, 8, PropertyMode.Replace, pdata, data.Length);
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return property;
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}
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else
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return IntPtr.Zero;
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}
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private unsafe bool OnEvent(ref XEvent ev)
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{
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if (ev.type == XEventName.SelectionNotify && ev.SelectionEvent.selection == _x11.Atoms.CLIPBOARD)
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{
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var sel = ev.SelectionEvent;
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if (sel.property == IntPtr.Zero)
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{
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_requestedFormatsHandle.SetResult(null);
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_requestedTextHandle.SetResult(null);
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}
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XGetWindowProperty(_x11.Display, window.Handle, sel.property, IntPtr.Zero, new IntPtr(0x7fffffff), true, (IntPtr)Atom.AnyPropertyType,
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out var actualAtom, out var actualFormat, out var nitems, out var bytes_after, out var prop);
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Encoding textEnc = null;
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if (nitems == IntPtr.Zero)
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{
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_requestedFormatsHandle.SetResult(null);
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_requestedTextHandle.SetResult(null);
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}
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else
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{
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if (sel.property == _x11.Atoms.TARGETS)
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{
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if (actualFormat != 32)
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{
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_requestedFormatsHandle.SetResult(null);
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}
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else
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{
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var formats = new IntPtr[nitems.ToInt32()];
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Marshal.Copy(prop, formats, 0, formats.Length);
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_requestedFormatsHandle.SetResult(formats);
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//_requestedFormatsTcs?.TrySetResult(formats);
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}
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}
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else if ((textEnc = GetStringEncoding(sel.property)) != null)
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{
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var text = textEnc.GetString((byte*)prop.ToPointer(), nitems.ToInt32());
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//_requestedTextTcs?.TrySetResult(text);
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_requestedTextHandle.SetResult(text);
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}
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else if (sel.property == DataObject.htmlAtom)
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{
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var html = Encoding.UTF8.GetString((byte*)prop.ToPointer(), nitems.ToInt32());
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_requestedTextHandle.SetResult(html);
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}
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}
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XFree(prop);
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}
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return false;
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}
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IntPtr[] SendFormatRequest()
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{
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//if (_requestedFormatsTcs == null || _requestedFormatsTcs.Task.IsCompleted)
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// _requestedFormatsTcs = new TaskCompletionSource<IntPtr[]>();
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if (_requestedFormatsHandle == null || _requestedFormatsHandle.Cancel)
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{
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_requestedFormatsHandle = new CancelHandle();
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}
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XConvertSelection(_x11.Display, _x11.Atoms.CLIPBOARD, _x11.Atoms.TARGETS, _x11.Atoms.TARGETS, window.Handle,
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IntPtr.Zero);
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//while (!_requestedFormatsTcs.Task.IsCompleted)
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//{
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// XNextEvent(_x11.Display, out var xev);
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// OnEvent(xev);
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// LinuxPlatform.Platform.OnEvent(xev);
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//}
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LinuxPlatform.Platform.RunMainLoop(_requestedFormatsHandle, OnEvent);
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//return _requestedFormatsTcs.Task;
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return (IntPtr[])_requestedFormatsHandle.Data;
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}
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string SendTextRequest(IntPtr format)
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{
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//if (_requestedTextTcs == null || _requestedFormatsTcs.Task.IsCompleted)
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// _requestedTextTcs = new TaskCompletionSource<string>();
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if (_requestedTextHandle == null || _requestedFormatsHandle.Cancel)
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{
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_requestedTextHandle = new CancelHandle();
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}
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XConvertSelection(_x11.Display, _x11.Atoms.CLIPBOARD, format, format, window.Handle, IntPtr.Zero);
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//while (!_requestedTextTcs.Task.IsCompleted)
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//{
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// XNextEvent(_x11.Display, out var xev);
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// OnEvent(xev);
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// LinuxPlatform.Platform.OnEvent(xev);
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//}
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//return _requestedTextTcs.Task;
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LinuxPlatform.Platform.RunMainLoop(_requestedTextHandle, OnEvent);
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return (string)_requestedTextHandle.Data;
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}
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public void Clear()
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{
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SetData((DataFormat.Text, null));
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}
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public bool Contains(DataFormat dataFormat)
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{
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if (dataFormat == DataFormat.Text)
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{
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return GetData(DataFormat.Text) != null;
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}
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else if (dataFormat == DataFormat.Html)
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{
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return GetData(DataFormat.Html) != null;
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}
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return false;
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}
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string GetText()
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{
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if (XGetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD) == IntPtr.Zero)
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return null;
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var res = SendFormatRequest();
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var target = _x11.Atoms.UTF8_STRING;
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if (res != null)
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{
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var preferredFormats = new[] { _x11.Atoms.UTF16_STRING, _x11.Atoms.UTF8_STRING, _x11.Atoms.XA_STRING };
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foreach (var pf in preferredFormats)
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if (res.Contains(pf))
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{
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target = pf;
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break;
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}
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}
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return SendTextRequest(target);
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}
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string GetHtml()
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{
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if (XGetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD) == IntPtr.Zero)
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return null;
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var res = SendFormatRequest();
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return SendTextRequest(DataObject.htmlAtom);
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}
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public object GetData(DataFormat dataFormat)
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{
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if (dataFormat == DataFormat.Text)
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{
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return GetText();
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}
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if (dataFormat == DataFormat.Html)
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{
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return GetHtml();
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}
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throw new NotImplementedException("暂时不支持：" + dataFormat);
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}
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public void SetData(params (DataFormat, object)[] data)
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{
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_storedHtml = null;
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_storedString = null;
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foreach (var item in data)
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{
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if (item.Item1 == DataFormat.Text)
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{
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_storedString = item.Item2 == null ? null : item.Item2.ToString();
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//break;
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}
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else if (item.Item1 == DataFormat.Html)
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{
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_storedHtml = item.Item2?.ToString();
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}
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}
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if (data.Length > 0)
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{
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XSetSelectionOwner(_x11.Display, _x11.Atoms.CLIPBOARD, window.Handle, IntPtr.Zero);
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}
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}
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}
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}
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