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| 1 | +using System.Collections.Generic; |
| 2 | +using System; |
| 3 | +using System.Runtime.InteropServices; |
| 4 | +using System.Windows; |
| 5 | +using Windows.Win32; |
| 6 | +using Windows.Win32.Foundation; |
| 7 | +using Windows.Win32.Graphics.Gdi; |
| 8 | +using Windows.Win32.UI.WindowsAndMessaging; |
| 9 | + |
| 10 | +namespace Flow.Launcher.Infrastructure; |
| 11 | + |
| 12 | +/// <summary> |
| 13 | +/// Contains full information about a display monitor. |
| 14 | +/// Codes are edited from: <see href="https://github.com/Jack251970/DesktopWidgets3">. |
| 15 | +/// </summary> |
| 16 | +internal class MonitorInfo |
| 17 | +{ |
| 18 | + /// <summary> |
| 19 | + /// Gets the display monitors (including invisible pseudo-monitors associated with the mirroring drivers). |
| 20 | + /// </summary> |
| 21 | + /// <returns>A list of display monitors</returns> |
| 22 | + public static unsafe IList<MonitorInfo> GetDisplayMonitors() |
| 23 | + { |
| 24 | + var monitorCount = PInvoke.GetSystemMetrics(SYSTEM_METRICS_INDEX.SM_CMONITORS); |
| 25 | + var list = new List<MonitorInfo>(monitorCount); |
| 26 | + var callback = new MONITORENUMPROC((HMONITOR monitor, HDC deviceContext, RECT* rect, LPARAM data) => |
| 27 | + { |
| 28 | + list.Add(new MonitorInfo(monitor, rect)); |
| 29 | + return true; |
| 30 | + }); |
| 31 | + var dwData = new LPARAM(); |
| 32 | + var hdc = new HDC(); |
| 33 | + bool ok = PInvoke.EnumDisplayMonitors(hdc, (RECT?)null, callback, dwData); |
| 34 | + if (!ok) |
| 35 | + { |
| 36 | + Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error()); |
| 37 | + } |
| 38 | + return list; |
| 39 | + } |
| 40 | + |
| 41 | + /// <summary> |
| 42 | + /// Gets the display monitor that is nearest to a given window. |
| 43 | + /// </summary> |
| 44 | + /// <param name="hwnd">Window handle</param> |
| 45 | + /// <returns>The display monitor that is nearest to a given window, or null if no monitor is found.</returns> |
| 46 | + public static unsafe MonitorInfo GetNearestDisplayMonitor(HWND hwnd) |
| 47 | + { |
| 48 | + var nearestMonitor = PInvoke.MonitorFromWindow(hwnd, MONITOR_FROM_FLAGS.MONITOR_DEFAULTTONEAREST); |
| 49 | + MonitorInfo nearestMonitorInfo = null; |
| 50 | + var callback = new MONITORENUMPROC((HMONITOR monitor, HDC deviceContext, RECT* rect, LPARAM data) => |
| 51 | + { |
| 52 | + if (monitor == nearestMonitor) |
| 53 | + { |
| 54 | + nearestMonitorInfo = new MonitorInfo(monitor, rect); |
| 55 | + return false; |
| 56 | + } |
| 57 | + return true; |
| 58 | + }); |
| 59 | + var dwData = new LPARAM(); |
| 60 | + var hdc = new HDC(); |
| 61 | + bool ok = PInvoke.EnumDisplayMonitors(hdc, (RECT?)null, callback, dwData); |
| 62 | + if (!ok) |
| 63 | + { |
| 64 | + Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error()); |
| 65 | + } |
| 66 | + return nearestMonitorInfo; |
| 67 | + } |
| 68 | + |
| 69 | + private readonly HMONITOR _monitor; |
| 70 | + |
| 71 | + internal unsafe MonitorInfo(HMONITOR monitor, RECT* rect) |
| 72 | + { |
| 73 | + RectMonitor = |
| 74 | + new Rect(new Point(rect->left, rect->top), |
| 75 | + new Point(rect->right, rect->bottom)); |
| 76 | + _monitor = monitor; |
| 77 | + var info = new MONITORINFOEXW() { monitorInfo = new MONITORINFO() { cbSize = (uint)sizeof(MONITORINFOEXW) } }; |
| 78 | + GetMonitorInfo(monitor, ref info); |
| 79 | + RectWork = |
| 80 | + new Rect(new Point(info.monitorInfo.rcWork.left, info.monitorInfo.rcWork.top), |
| 81 | + new Point(info.monitorInfo.rcWork.right, info.monitorInfo.rcWork.bottom)); |
| 82 | + Name = new string(info.szDevice.AsSpan()).Replace("\0", "").Trim(); |
| 83 | + } |
| 84 | + |
| 85 | + /// <summary> |
| 86 | + /// Gets the name of the display. |
| 87 | + /// </summary> |
| 88 | + public string Name { get; } |
| 89 | + |
| 90 | + /// <summary> |
| 91 | + /// Gets the display monitor rectangle, expressed in virtual-screen coordinates. |
| 92 | + /// </summary> |
| 93 | + /// <remarks> |
| 94 | + /// <note>If the monitor is not the primary display monitor, some of the rectangle's coordinates may be negative values.</note> |
| 95 | + /// </remarks> |
| 96 | + public Rect RectMonitor { get; } |
| 97 | + |
| 98 | + /// <summary> |
| 99 | + /// Gets the work area rectangle of the display monitor, expressed in virtual-screen coordinates. |
| 100 | + /// </summary> |
| 101 | + /// <remarks> |
| 102 | + /// <note>If the monitor is not the primary display monitor, some of the rectangle's coordinates may be negative values.</note> |
| 103 | + /// </remarks> |
| 104 | + public Rect RectWork { get; } |
| 105 | + |
| 106 | + /// <summary> |
| 107 | + /// Gets if the monitor is the the primary display monitor. |
| 108 | + /// </summary> |
| 109 | + public bool IsPrimary => _monitor == PInvoke.MonitorFromWindow(new(IntPtr.Zero), MONITOR_FROM_FLAGS.MONITOR_DEFAULTTOPRIMARY); |
| 110 | + |
| 111 | + /// <inheritdoc /> |
| 112 | + public override string ToString() => $"{Name} {RectMonitor.Width}x{RectMonitor.Height}"; |
| 113 | + |
| 114 | + private static unsafe bool GetMonitorInfo(HMONITOR hMonitor, ref MONITORINFOEXW lpmi) |
| 115 | + { |
| 116 | + fixed (MONITORINFOEXW* lpmiLocal = &lpmi) |
| 117 | + { |
| 118 | + var lpmiBase = (MONITORINFO*)lpmiLocal; |
| 119 | + var __result = PInvoke.GetMonitorInfo(hMonitor, lpmiBase); |
| 120 | + return __result; |
| 121 | + } |
| 122 | + } |
| 123 | +} |
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