/AvalonEdit/ICSharpCode.AvalonEdit/Utils/Win32.cs
http://github.com/icsharpcode/ILSpy · C# · 100 lines · 59 code · 9 blank · 32 comment · 10 complexity · 4990800ffd4d34095d8ac3011092b478 MD5 · raw file
- // Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy of this
- // software and associated documentation files (the "Software"), to deal in the Software
- // without restriction, including without limitation the rights to use, copy, modify, merge,
- // publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
- // to whom the Software is furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in all copies or
- // substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
- // INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
- // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
- // FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- // DEALINGS IN THE SOFTWARE.
- using System;
- using System.Runtime.InteropServices;
- using System.Security;
- using System.Windows;
- using System.Windows.Interop;
- using System.Windows.Media;
- namespace ICSharpCode.AvalonEdit.Utils
- {
- /// <summary>
- /// Wrapper around Win32 functions.
- /// </summary>
- static class Win32
- {
- /// <summary>
- /// Gets the caret blink time.
- /// </summary>
- public static TimeSpan CaretBlinkTime {
- get { return TimeSpan.FromMilliseconds(SafeNativeMethods.GetCaretBlinkTime()); }
- }
-
- /// <summary>
- /// Creates an invisible Win32 caret for the specified Visual with the specified size (coordinates local to the owner visual).
- /// </summary>
- public static bool CreateCaret(Visual owner, Size size)
- {
- if (owner == null)
- throw new ArgumentNullException("owner");
- HwndSource source = PresentationSource.FromVisual(owner) as HwndSource;
- if (source != null) {
- Vector r = owner.PointToScreen(new Point(size.Width, size.Height)) - owner.PointToScreen(new Point(0, 0));
- return SafeNativeMethods.CreateCaret(source.Handle, IntPtr.Zero, (int)Math.Ceiling(r.X), (int)Math.Ceiling(r.Y));
- } else {
- return false;
- }
- }
-
- /// <summary>
- /// Sets the position of the caret previously created using <see cref="CreateCaret"/>. position is relative to the owner visual.
- /// </summary>
- public static bool SetCaretPosition(Visual owner, Point position)
- {
- if (owner == null)
- throw new ArgumentNullException("owner");
- HwndSource source = PresentationSource.FromVisual(owner) as HwndSource;
- if (source != null) {
- Point pointOnRootVisual = owner.TransformToAncestor(source.RootVisual).Transform(position);
- Point pointOnHwnd = pointOnRootVisual.TransformToDevice(source.RootVisual);
- return SafeNativeMethods.SetCaretPos((int)pointOnHwnd.X, (int)pointOnHwnd.Y);
- } else {
- return false;
- }
- }
-
- /// <summary>
- /// Destroys the caret previously created using <see cref="CreateCaret"/>.
- /// </summary>
- public static bool DestroyCaret()
- {
- return SafeNativeMethods.DestroyCaret();
- }
-
- [SuppressUnmanagedCodeSecurity]
- static class SafeNativeMethods
- {
- [DllImport("user32.dll")]
- public static extern int GetCaretBlinkTime();
-
- [DllImport("user32.dll")]
- [return: MarshalAs(UnmanagedType.Bool)]
- public static extern bool CreateCaret(IntPtr hWnd, IntPtr hBitmap, int nWidth, int nHeight);
-
- [DllImport("user32.dll")]
- [return: MarshalAs(UnmanagedType.Bool)]
- public static extern bool SetCaretPos(int x, int y);
-
- [DllImport("user32.dll")]
- [return: MarshalAs(UnmanagedType.Bool)]
- public static extern bool DestroyCaret();
- }
- }
- }