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refactor: rewrite custom WM_NCHITTEST implementation on Windows

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leo 2025-05-13 10:14:31 +08:00
parent 4e41a6207a
commit 8a45e25106
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1 changed files with 28 additions and 42 deletions
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70
src/Native/Windows.cs
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@ -24,34 +24,6 @@ namespace SourceGit.Native
public int bottom;
}
internal enum HitTest
{
HTERROR = -2,
HTTRANSPARENT = -1,
HTNOWHERE = 0,
HTCLIENT = 1,
HTCAPTION = 2,
HTSYSMENU = 3,
HTGROWBOX = 4,
HTMENU = 5,
HTHSCROLL = 6,
HTVSCROLL = 7,
HTMINBUTTON = 8,
HTMAXBUTTON = 9,
HTLEFT = 10,
HTRIGHT = 11,
HTTOP = 12,
HTTOPLEFT = 13,
HTTOPRIGHT = 14,
HTBOTTOM = 15,
HTBOTTOMLEFT = 16,
HTBOTTOMRIGHT = 17,
HTBORDER = 18,
HTOBJECT = 19,
HTCLOSE = 20,
HTHELP = 21
}
[StructLayout(LayoutKind.Sequential)]
internal struct MARGINS
{
@ -103,32 +75,46 @@ namespace SourceGit.Native
handled = true;
if (window.WindowState == WindowState.FullScreen || window.WindowState == WindowState.Maximized)
return (IntPtr)HitTest.HTCLIENT;
return 1; // HTCLIENT
var p = IntPtrToPixelPoint(lParam);
GetWindowRect(hWnd, out var rcWindow);
var borderThinkness = (int)(4 * window.RenderScaling);
int row = 1;
int col = 1;
int y = 1;
int x = 1;
if (p.X >= rcWindow.left && p.X < rcWindow.left + borderThinkness)
col = 0;
x = 0;
else if (p.X < rcWindow.right && p.X >= rcWindow.right - borderThinkness)
col = 2;
x = 2;
if (p.Y >= rcWindow.top && p.Y < rcWindow.top + borderThinkness)
row = 0;
y = 0;
else if (p.Y < rcWindow.bottom && p.Y >= rcWindow.bottom - borderThinkness)
row = 2;
y = 2;
ReadOnlySpan<HitTest> zones = stackalloc HitTest[]
var zone = y * 3 + x;
switch (zone)
{
HitTest.HTTOPLEFT, HitTest.HTTOP, HitTest.HTTOPRIGHT,
HitTest.HTLEFT, HitTest.HTCLIENT, HitTest.HTRIGHT,
HitTest.HTBOTTOMLEFT, HitTest.HTBOTTOM, HitTest.HTBOTTOMRIGHT
};
return (IntPtr)(zones[row * 3 + col]);
case 0:
return 13; // HTTOPLEFT
case 1:
return 12; // HTTOP
case 2:
return 14; // HTTOPRIGHT
case 3:
return 10; // HTLEFT
case 4:
return 1; // HTCLIENT
case 5:
return 11; // HTRIGHT
case 6:
return 16; // HTBOTTOMLEFT
case 7:
return 15; // HTBOTTOM
default:
return 17; // HTBOTTOMRIGHT
}
}
return IntPtr.Zero;