Support File Path longer than 260 (tweak needed: https://www.tenforums.com/tutorials/51704-enable-disable-win32-long-paths-windows-10-a.html)

QuickLook.Native/QuickLook.Native32/DOpus.cpp

@@ -103,7 +103,7 @@ void DOpus::ParseXmlBuffer(PWCHAR buffer)
 		auto b = new WCHAR[size];
 		MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, path, -1, b, size);
 
-		wcscpy_s(buffer, MAX_PATH, b);
+		wcscpy_s(buffer, MAX_PATH_EX, b); // DOpus supports Long Path
 
 		delete[] b;
 		return; // we now cares only the first result

QuickLook.Native/QuickLook.Native32/DialogHook.cpp

@@ -58,9 +58,9 @@ void DialogHook::GetSelected(PWCHAR buffer)
 	if (!IsWow64Process(GetCurrentProcess(), &isSelfWoW64))
 		return;
 
+	// if QuickLook is 64bit and target is 32bit, obtain result from the helper
 	if (isTargetWoW64 && !isSelfWoW64)
 	{
-		// if self is 64bit and target is 32bit, do this
 		GetSelectedFromWoW64HookHelper(buffer);
 	}
 	else
@@ -72,7 +72,8 @@ void DialogHook::GetSelected(PWCHAR buffer)
 			return;
 
 		SendMessage(hwndfg, WM_HOOK_NOTIFY, 0, 0);
-		wcscpy_s(buffer, MAX_PATH, filePathBuffer);
+		
+		GetLongPathName(filePathBuffer, buffer, MAX_PATH_EX);
 	}
 }
 
@@ -114,7 +115,7 @@ void DialogHook::GetSelectedFromWoW64HookHelper(PWCHAR buffer)
 	SendMessage(hHelperWnd, WM_HOOK_NOTIFY, 0, 0);
 
 	// the sharedBuffer should now ready
-	wcscpy_s(buffer, MAX_PATH, sharedBuffer);
+	GetLongPathName(sharedBuffer, buffer, MAX_PATH_EX);
 
 	UnmapViewOfFile(sharedBuffer);
 	CloseHandle(hMapFile);

QuickLook.Native/QuickLook.Native32/Everything.cpp

@@ -43,7 +43,7 @@ void Everything::GetSelected(PWCHAR buffer)
 
 	auto p = wcsstr(pText, L"\r\n");
 	auto l = p == nullptr ? wcslen(pText) : p - pText;
-	wcsncpy_s(buffer, MAX_PATH, pText, l);
+	wcsncpy_s(buffer, MAX_PATH_EX, pText, l); // Everything supports Long Path
 
 	GlobalUnlock(hData);
 

QuickLook.Native/QuickLook.Native32/HelperMethods.cpp

@@ -60,7 +60,10 @@ void HelperMethods::ObtainFirstItem(CComPtr<IDataObject> dao, PWCHAR buffer)
 	if (n < 1)
 		return;
 
-	DragQueryFile(HDROP(medium.hGlobal), 0, buffer, MAX_PATH - 1);
+	WCHAR localBuffer[MAX_PATH] = { '\0' };
+	DragQueryFile(HDROP(medium.hGlobal), 0, localBuffer, MAX_PATH);
+	
+	GetLongPathName(localBuffer, buffer, MAX_PATH_EX);
 }
 
 bool HelperMethods::IsListaryToolbarVisible()

QuickLook.Native/QuickLook.Native32/stdafx.h

@@ -33,3 +33,5 @@
 #include<Shellapi.h>
 #include<Psapi.h>
 #include<AppModel.h>
+
+#define MAX_PATH_EX 32767

QuickLook.Native/QuickLook.WoW64HookHelper/QuickLook.WoW64HookHelper.cpp

@@ -81,7 +81,9 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 
 void GetCurrentSelection()
 {
-	WCHAR dllBuffer[MAX_PATH] = {'\0'};
+	// This function runs inside the target process. Some of them may already support Long Path.
+	// Therefore, we must assume all of them support Long Path to avoid buffer overflow.
+	WCHAR dllBuffer[MAX_PATH_EX] = {'\0'};
 	pGCS(dllBuffer);
 
 	auto hMapFile = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, SHARED_MEM_NAME);
@@ -95,7 +97,7 @@ void GetCurrentSelection()
 		return;
 	}
 
-	wcscpy_s(buffer, MAX_PATH, dllBuffer);
+	wcscpy_s(buffer, MAX_PATH_EX, dllBuffer);
 
 	UnmapViewOfFile(buffer);
 	CloseHandle(hMapFile);

QuickLook.Native/QuickLook.WoW64HookHelper/stdafx.h

@@ -31,3 +31,4 @@
 
 
 // TODO: reference additional headers your program requires here
+#define MAX_PATH_EX 32767

QuickLook/App.config

@@ -5,6 +5,7 @@
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2" />
   </startup>
   <runtime>
+    <AppContextSwitchOverrides value="Switch.System.IO.UseLegacyPathHandling=false;Switch.System.IO.BlockLongPaths=false" />
     <AppContextSwitchOverrides value="Switch.System.Windows.DoNotScaleForDpiChanges=false" />
     <legacyCorruptedStateExceptionsPolicy enabled="true" />
     <legacyUnhandledExceptionPolicy enabled="1" />

QuickLook/NativeMethods/QuickLook.cs

@@ -27,7 +27,7 @@ namespace QuickLook.NativeMethods
 {
     internal static class QuickLook
     {
-        private const int MaxPath = 8192;
+        private const int MaxPath = 32767;
 
         [DllImport("QuickLook.Native32.dll", EntryPoint = "Init",
             CallingConvention = CallingConvention.Cdecl)]

QuickLook/Plugin/InfoPanel/WindowsThumbnailProvider.cs

@@ -122,7 +122,7 @@ namespace QuickLook.Plugin.InfoPanel
                 SHCreateItemFromParsingName(fileName, IntPtr.Zero, ref shellItem2Guid, out var nativeShellItem);
 
             if (retCode != 0)
-                throw Marshal.GetExceptionForHR(retCode);
+                return IntPtr.Zero;
 
             var nativeSize = new NativeSize
             {

QuickLook/app.manifest

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
+
 <assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
   <assemblyIdentity version="1.0.0.0" name="MyApplication.app" />
   <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
@@ -53,12 +54,9 @@
   <application xmlns="urn:schemas-microsoft-com:asm.v3">
     <windowsSettings>
       <!-- The combination of below two tags have the following effect : 1) Per-Monitor for >= Windows 10 Anniversary Update 2) System < Windows 10 Anniversary Update -->
-      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
-        PerMonitor
-      </dpiAwareness>
-      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
-        true
-      </dpiAware>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitor</dpiAwareness>
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
+      <longPathAware xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</longPathAware>
     </windowsSettings>
   </application>