From 07071c54b866c7564819ce7592d6197919547ce2 Mon Sep 17 00:00:00 2001
From: aubymori <aubyomori@gmail.com>
Date: Sun, 24 Sep 2023 18:11:11 -0500
Subject: [PATCH] Themed Regedit ListView 1.0.0

---
 mods/themed-regedit-listview.wh.cpp | 175 ++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 mods/themed-regedit-listview.wh.cpp

diff --git a/mods/themed-regedit-listview.wh.cpp b/mods/themed-regedit-listview.wh.cpp
new file mode 100644
index 000000000..669da444d
--- /dev/null
+++ b/mods/themed-regedit-listview.wh.cpp
@@ -0,0 +1,175 @@
+// ==WindhawkMod==
+// @id              themed-regedit-listview
+// @name            Themed Regedit ListView
+// @description     Makes the ListView in Regedit themed
+// @version         1.0.0
+// @author          aubymori
+// @github          https://github.com/aubymori
+// @include         regedit.exe
+// @compilerOptions -luxtheme
+// ==/WindhawkMod==
+
+// ==WindhawkModReadme==
+/*
+# Themed Regedit ListView
+For a brief time during Windows 10's life, the Registry Editor had a themed
+ListView. This mod restores that.
+
+**Before**:
+
+![Before](https://raw.githubusercontent.com/aubymori/images/main/themed-regedit-listview-before.png)
+
+**After**:
+
+![After](https://raw.githubusercontent.com/aubymori/images/main/themed-regedit-listview-after.png)
+*/
+// ==/WindhawkModReadme==
+
+// ==WindhawkModSettings==
+/*
+- themed: true
+  $name: Themed ListView
+  $description: Applies theme to the ListView
+- fullrow: true
+  $name: Full-row selection
+  $description: Makes the ListView use full-row selection
+*/
+// ==/WindhawkModSettings==
+
+#include <uxtheme.h>
+#include <commctrl.h>
+
+HWND hListView;
+
+struct
+{
+    BOOL bThemed;
+    BOOL bFullrow;
+} settings;
+
+void UpdateListView(BOOL bInit)
+{
+    if (settings.bThemed)
+    {
+        SetWindowTheme(
+            hListView,
+            bInit ? L"Explorer" : NULL,
+            NULL
+        );
+        SendMessageW(hListView, WM_THEMECHANGED, NULL, NULL);
+    }
+
+    if (settings.bFullrow)
+    {
+        ListView_SetExtendedListViewStyle(
+            hListView,
+            bInit
+        ?   LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER
+        :   ListView_GetExtendedListViewStyle(hListView) & ~(LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER)
+        );
+    }
+}
+
+using CreateWindowExW_t = decltype(&CreateWindowExW);
+CreateWindowExW_t CreateWindowExW_orig;
+HWND WINAPI CreateWindowExW_hook(
+    DWORD     dwExStyle,
+    LPCWSTR   lpClassName,
+    LPCWSTR   lpWindowName,
+    DWORD     dwStyle,
+    int       X,
+    int       Y,
+    int       nWidth,
+    int       nHeight,
+    HWND      hWndParent,
+    HMENU     hMenu,
+    HINSTANCE hInstance,
+    LPVOID    lpParam
+)
+{
+    HWND hRes = CreateWindowExW_orig(
+        dwExStyle, lpClassName, lpWindowName, dwStyle,
+        X, Y, nWidth, nHeight, hWndParent, hMenu,
+        hInstance, lpParam
+    );
+
+    if (hWndParent != NULL
+    &&  lpClassName != NULL
+    &&  (((ULONG_PTR)lpClassName & ~(ULONG_PTR)0xffff) != 0)
+    &&  0 == wcscmp(lpClassName, L"SysListView32")
+    )
+    {
+        WCHAR lpPrntCls[256];
+        GetClassNameW(hWndParent, lpPrntCls, 256);
+        if (0 == wcscmp(lpPrntCls, L"RegEdit_RegEdit"))
+        {
+            hListView = hRes;
+            UpdateListView(TRUE);
+        }
+    }
+
+    return hRes;
+}
+
+void LoadSettings(void)
+{
+    settings.bThemed = Wh_GetIntSetting(L"themed");
+    settings.bFullrow = Wh_GetIntSetting(L"fullrow");
+}
+
+BOOL CALLBACK FindListViewProc(HWND hWnd, LPARAM lParam)
+{
+    DWORD pId;
+    WCHAR lpClass[256];
+
+    GetWindowThreadProcessId(hWnd, &pId);
+    GetClassNameW(hWnd, lpClass, 256);
+
+    if (pId == (DWORD)lParam
+    &&  0 == wcscmp(lpClass, L"RegEdit_RegEdit"))
+    {
+        hListView = FindWindowExW(hWnd, NULL, L"SysListView32", NULL);
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+BOOL FindListView(void)
+{
+    DWORD pId = GetCurrentProcessId();
+    EnumWindows(FindListViewProc, (LPARAM)pId);
+    return (hListView != NULL);
+}
+
+BOOL Wh_ModInit(void)
+{
+    LoadSettings();
+
+    if (FindListView())
+    {
+        UpdateListView(TRUE);
+    }
+
+    if (!Wh_SetFunctionHook(
+        (void *)CreateWindowExW,
+        (void *)CreateWindowExW_hook,
+        (void **)&CreateWindowExW_orig
+    ))
+    {
+        return FALSE;
+    }
+
+    return true;
+}
+
+void Wh_ModUninit(void)
+{
+    UpdateListView(FALSE);
+}
+
+BOOL Wh_ModSettingsChanged(BOOL *bReload)
+{
+    *bReload = TRUE;
+    return TRUE;
+}
\ No newline at end of file