🎨 同步 DeviceInfo.uwp

Author: Lxy829

src/BD.Common.Essentials.Maui.Runtime/Essentials/DeviceInfo/DeviceInfo.uwp.cs

@@ -109,16 +109,89 @@ public DeviceType DeviceType
         }
     }
 
-    static readonly int SM_CONVERTIBLESLATEMODE = 0x2003;
-    static readonly int SM_TABLETPC = 0x56;
+    /// <summary>
+    /// Whether or not the device is in "tablet mode" or not. This
+    /// has to be implemented by the device manufacturer.
+    /// </summary>
+    const int SM_CONVERTIBLESLATEMODE = 0x2003;
+
+    /// <summary>
+    /// How many fingers (aka touches) are supported for touch control
+    /// </summary>
+    const int SM_MAXIMUMTOUCHES = 95;
+
+    /// <summary>
+    /// Whether a physical keyboard is attached or not.
+    /// Manufacturers have to remember to set this.
+    /// Defaults to not-attached.
+    /// </summary>
+    const int SM_ISDOCKED = 0x2004;
+
 
     [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
     static extern int GetSystemMetrics(int nIndex);
 
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+    static extern bool GetAutoRotationState(ref AutoRotationState pState);
+
+    [DllImport("Powrprof.dll", SetLastError = true, CharSet = CharSet.Auto)]
+    static extern PowerPlatformRole PowerDeterminePlatformRoleEx(ulong Version);
+
     static bool GetIsInTabletMode()
     {
-        var supportsTablet = GetSystemMetrics(SM_TABLETPC) != 0;
-        var inTabletMode = GetSystemMetrics(SM_CONVERTIBLESLATEMODE) == 0;
-        return inTabletMode && supportsTablet;
+        // Adopt Chromium's methodology for determining tablet mode
+        // https://source.chromium.org/chromium/chromium/src/+/main:base/win/win_util.cc;l=537;drc=ac83a5a2d3c04763d86ce16d92f3904cc9566d3a;bpv=0;bpt=1
+        // Device does not have a touchscreen
+        if (GetSystemMetrics(SM_MAXIMUMTOUCHES) == 0)
+        {
+            return false;
+        }
+
+        // If the device is docked, user is treating as a PC
+        if (GetSystemMetrics(SM_ISDOCKED) != 0)
+        {
+            return false;
+        }
+
+        // Fetch device rotation. Possible for this to fail.
+        AutoRotationState rotationState = AutoRotationState.AR_ENABLED;
+        bool success = GetAutoRotationState(ref rotationState);
+
+        // Fetch succeeded and device does not support rotation
+        if (success && (rotationState & (AutoRotationState.AR_NOT_SUPPORTED | AutoRotationState.AR_LAPTOP | AutoRotationState.AR_NOSENSOR)) != 0)
+        {
+            return false;
+        }
+
+        // Check if power management says we are mobile (laptop) or a tablet
+        if ((PowerDeterminePlatformRoleEx(2) & (PowerPlatformRole.PlatformRoleMobile | PowerPlatformRole.PlatformRoleSlate)) != 0)
+        {
+            // Check if tablet mode is 0. 0 is default value.
+            return GetSystemMetrics(SM_CONVERTIBLESLATEMODE) == 0;
+        }
+
+        return false;
     }
 }
+
+/// <summary>
+/// Represents the OEM's preferred power management profile,
+/// Useful in-case OEM implements one but not the other
+/// </summary>
+enum PowerPlatformRole
+{
+    PlatformRoleMobile = 2,
+    PlatformRoleSlate = 8,
+}
+
+/// <summary>
+/// Whether rotation is supported or not.
+/// Rotation is only supported if AR_ENABLED is true
+/// </summary>
+enum AutoRotationState
+{
+    AR_ENABLED = 0x0,
+    AR_NOT_SUPPORTED = 0x20,
+    AR_LAPTOP = 0x80,
+    AR_NOSENSOR = 0x10,
+}