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https://github.com/QL-Win/QuickLook.git
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Merged QuickLook.Common from submodule
https://github.com/QL-Win/QuickLook.Common/commit/529d07b56577b88329481cdac8f2a6a175b6c21a
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ema
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// Copyright © 2017-2026 QL-Win Contributors
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//
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// This file is part of QuickLook program.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using QuickLook.Common.NativeMethods;
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using System;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Windows;
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using System.Windows.Forms;
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using System.Windows.Interop;
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using System.Windows.Media;
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namespace QuickLook.Common.Helpers;
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public static class WindowHelper
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{
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public enum WindowCompositionAttribute
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{
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WcaAccentPolicy = 19,
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}
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public static Size GetCurrentDesktopSize()
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{
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var scale = DisplayDeviceHelper.GetCurrentScaleFactor();
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var rect = GetCurrentDesktopRectInPixel();
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return new Size(rect.Width / scale.Horizontal, rect.Height / scale.Vertical);
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}
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public static Rect GetCurrentDesktopRectInPixel()
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{
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return GetDesktopRectFromWindowInPixel(User32.GetForegroundWindow());
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}
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public static Rect GetDesktopRectFromWindowInPixel(Window window)
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{
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return GetDesktopRectFromWindowInPixel(new WindowInteropHelper(window).Handle);
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}
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public static Rect GetDesktopRectFromWindowInPixel(nint hwnd)
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{
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var screen = Screen.FromHandle(hwnd).WorkingArea;
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var area = new Rect(new Point(screen.X, screen.Y),
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new Size(screen.Width, screen.Height));
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return area;
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}
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public static void BringToFront(this Window window, bool keep)
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{
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var handle = new WindowInteropHelper(window).Handle;
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keep |= window.Topmost;
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User32.SetWindowPos(handle, User32.HWND_TOPMOST, 0, 0, 0, 0,
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User32.SWP_NOMOVE | User32.SWP_NOSIZE | User32.SWP_NOACTIVATE);
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if (!keep)
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User32.SetWindowPos(handle, User32.HWND_NOTOPMOST, 0, 0, 0, 0,
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User32.SWP_NOMOVE | User32.SWP_NOSIZE | User32.SWP_NOACTIVATE);
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}
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public static void MoveWindow(this Window window,
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double pxLeft,
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double pxTop,
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double width,
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double height)
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{
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var handle = new WindowInteropHelper(window).EnsureHandle();
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// scale the size to the primary display
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TransformToPixels(window, width, height,
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out var pxWidth, out var pxHeight);
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// Use absolute location and relative size. WPF will scale the size to the target display
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User32.MoveWindow(handle, (int)Math.Round(pxLeft), (int)Math.Round(pxTop), pxWidth, pxHeight, true);
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}
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public static Rect GetWindowRectInPixel(this Window window)
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{
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var handle = new WindowInteropHelper(window).EnsureHandle();
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User32.GetWindowRect(handle, out User32.RECT nRect);
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return new Rect(new Point(nRect.Left, nRect.Top), new Point(nRect.Right, nRect.Bottom));
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}
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private static void TransformToPixels(this Visual visual,
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double unitX,
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double unitY,
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out int pixelX,
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out int pixelY)
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{
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Matrix matrix;
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var source = PresentationSource.FromVisual(visual);
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if (source != null)
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matrix = source.CompositionTarget.TransformToDevice;
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else
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using (var src = new HwndSource(new HwndSourceParameters()))
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{
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matrix = src.CompositionTarget.TransformToDevice;
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}
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pixelX = (int)Math.Round(matrix.M11 * unitX);
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pixelY = (int)Math.Round(matrix.M22 * unitY);
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}
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public static bool IsForegroundWindowBelongToSelf()
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{
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var hwnd = User32.GetForegroundWindow();
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if (hwnd == IntPtr.Zero)
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return false;
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User32.GetWindowThreadProcessId(hwnd, out var procId);
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return procId == Process.GetCurrentProcess().Id;
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}
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public static void SetNoactivate(this Window window)
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{
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var hwnd = new WindowInteropHelper(window).Handle;
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User32.SetWindowLong(hwnd, User32.GWL_EXSTYLE,
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User32.GetWindowLong(hwnd, User32.GWL_EXSTYLE) |
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User32.WS_EX_NOACTIVATE);
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}
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public static void RemoveWindowControls(this Window window)
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{
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var hwnd = new WindowInteropHelper(window).Handle;
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User32.SetWindowLong(hwnd, User32.GWL_STYLE,
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User32.GetWindowLong(hwnd, User32.GWL_STYLE) &
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~User32.WS_SYSMENU);
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}
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public static void EnableBlur(Window window)
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{
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var accent = new AccentPolicy();
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var accentStructSize = Marshal.SizeOf(accent);
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accent.AccentState = AccentState.AccentEnableBlurbehind;
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accent.AccentFlags = 2;
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accent.GradientColor = 0x99FFFFFF;
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var accentPtr = Marshal.AllocHGlobal(accentStructSize);
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Marshal.StructureToPtr(accent, accentPtr, false);
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var data = new WindowCompositionAttributeData
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{
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Attribute = WindowCompositionAttribute.WcaAccentPolicy,
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SizeOfData = accentStructSize,
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Data = accentPtr
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};
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User32.SetWindowCompositionAttribute(new WindowInteropHelper(window).Handle, ref data);
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Marshal.FreeHGlobal(accentPtr);
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}
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public static void DisableBlur(Window window)
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{
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var accent = new AccentPolicy();
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var accentStructSize = Marshal.SizeOf(accent);
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accent.AccentState = AccentState.AccentDisabled;
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var accentPtr = Marshal.AllocHGlobal(accentStructSize);
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Marshal.StructureToPtr(accent, accentPtr, false);
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var data = new WindowCompositionAttributeData
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{
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Attribute = WindowCompositionAttribute.WcaAccentPolicy,
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SizeOfData = accentStructSize,
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Data = accentPtr
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};
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var hwnd = new WindowInteropHelper(window).EnsureHandle();
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User32.SetWindowCompositionAttribute(hwnd, ref data);
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Marshal.FreeHGlobal(accentPtr);
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var margins = new Dwmapi.Margins(0, 0, 0, 0);
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Dwmapi.DwmExtendFrameIntoClientArea(hwnd, ref margins);
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if (Environment.OSVersion.Version >= new Version(10, 0, 22523))
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{
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var backdropType = (int)Dwmapi.SystembackdropType.None;
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Dwmapi.DwmSetWindowAttribute(hwnd, (uint)Dwmapi.WindowAttribute.SystembackdropType, ref backdropType, Marshal.SizeOf(typeof(int)));
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}
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else if (Environment.OSVersion.Version >= new Version(10, 0, 21996))
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{
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var micaEnabled = 0;
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Dwmapi.DwmSetWindowAttribute(hwnd, (uint)Dwmapi.WindowAttribute.MicaEffect, ref micaEnabled, Marshal.SizeOf(typeof(int)));
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}
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}
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private static void EnableDwmBlur(Window window, bool isDarkTheme, uint dwAttribute, int pvAttribute)
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{
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// Mica will handle the color
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window.Background = Brushes.Transparent;
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var hwnd = new WindowInteropHelper(window).Handle;
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var isDarkThemeInt = isDarkTheme ? 1 : 0;
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Dwmapi.DwmSetWindowAttribute(hwnd, (uint)Dwmapi.WindowAttribute.UseImmersiveDarkMode, ref isDarkThemeInt, Marshal.SizeOf(typeof(bool)));
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var margins = new Dwmapi.Margins(-1, -1, -1, -1);
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Dwmapi.DwmExtendFrameIntoClientArea(hwnd, ref margins);
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var val = pvAttribute;
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Dwmapi.DwmSetWindowAttribute(hwnd, dwAttribute, ref val, Marshal.SizeOf(typeof(int)));
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}
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public static void EnableMicaBlur(Window window, bool isDarkTheme)
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{
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EnableDwmBlur(window, isDarkTheme, (uint)Dwmapi.WindowAttribute.MicaEffect, 1);
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}
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public static void EnableBackdropMicaBlur(Window window, bool isDarkTheme)
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{
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EnableDwmBlur(window, isDarkTheme, (uint)Dwmapi.WindowAttribute.SystembackdropType, (int)Dwmapi.SystembackdropType.MainWindow);
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct WindowCompositionAttributeData
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{
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public WindowCompositionAttribute Attribute;
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public nint Data;
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public int SizeOfData;
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}
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private enum AccentState
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{
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AccentDisabled = 0,
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AccentEnableGradient = 1,
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AccentEnableTransparentgradient = 2,
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AccentEnableBlurbehind = 3,
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AccentInvalidState = 4,
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct AccentPolicy
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{
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public AccentState AccentState;
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public int AccentFlags;
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public uint GradientColor;
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public readonly int AnimationId;
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}
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}
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