From 8fa040da9d0d3826f5ffda6bcbec4f53abd97452 Mon Sep 17 00:00:00 2001
From: Sean Hall <r.sean.hall@gmail.com>
Date: Wed, 27 Oct 2021 13:55:16 -0500
Subject: Allow more customization of control ids in thmutil.

Allow BAFunctions to set control ids.
Make sure control ids don't collide.
---
 src/api/burn/balutil/inc/BAFunctions.h            | 18 ++++++++++++++++++
 src/api/burn/balutil/inc/BalBaseBAFunctions.h     |  9 +++++++++
 src/api/burn/balutil/inc/BalBaseBAFunctionsProc.h | 12 ++++++++++++
 src/api/burn/balutil/inc/IBAFunctions.h           |  8 ++++++++
 4 files changed, 47 insertions(+)

(limited to 'src/api')

diff --git a/src/api/burn/balutil/inc/BAFunctions.h b/src/api/burn/balutil/inc/BAFunctions.h
index 43786701..2a34aaad 100644
--- a/src/api/burn/balutil/inc/BAFunctions.h
+++ b/src/api/burn/balutil/inc/BAFunctions.h
@@ -85,6 +85,7 @@ enum BA_FUNCTIONS_MESSAGE
 
     BA_FUNCTIONS_MESSAGE_ONTHEMELOADED = 1024,
     BA_FUNCTIONS_MESSAGE_WNDPROC,
+    BA_FUNCTIONS_MESSAGE_ONTHEMECONTROLLOADING,
 };
 
 typedef HRESULT(WINAPI *PFN_BA_FUNCTIONS_PROC)(
@@ -94,6 +95,10 @@ typedef HRESULT(WINAPI *PFN_BA_FUNCTIONS_PROC)(
     __in_opt LPVOID pvContext
     );
 
+// Should be the same as THEME_FIRST_ASSIGN_CONTROL_ID.
+// BAFunctions must only assign ids in the range [BAFUNCTIONS_FIRST_ASSIGN_CONTROL_ID, 0x8000) to avoid collisions.
+const WORD BAFUNCTIONS_FIRST_ASSIGN_CONTROL_ID = 0x4000;
+
 struct BA_FUNCTIONS_CREATE_ARGS
 {
     DWORD cbSize;
@@ -108,6 +113,19 @@ struct BA_FUNCTIONS_CREATE_RESULTS
     LPVOID pvBAFunctionsProcContext;
 };
 
+struct BA_FUNCTIONS_ONTHEMECONTROLLOADING_ARGS
+{
+    DWORD cbSize;
+    LPCWSTR wzName;
+};
+
+struct BA_FUNCTIONS_ONTHEMECONTROLLOADING_RESULTS
+{
+    DWORD cbSize;
+    BOOL fProcessed;
+    WORD wId;
+};
+
 struct BA_FUNCTIONS_ONTHEMELOADED_ARGS
 {
     DWORD cbSize;
diff --git a/src/api/burn/balutil/inc/BalBaseBAFunctions.h b/src/api/burn/balutil/inc/BalBaseBAFunctions.h
index a3054709..c2c8a6dc 100644
--- a/src/api/burn/balutil/inc/BalBaseBAFunctions.h
+++ b/src/api/burn/balutil/inc/BalBaseBAFunctions.h
@@ -841,6 +841,15 @@ public: // IBAFunctions
         return E_NOTIMPL;
     }
 
+    virtual STDMETHODIMP OnThemeControlLoading(
+        __in LPCWSTR /*wzName*/,
+        __inout BOOL* /*pfProcessed*/,
+        __inout WORD* /*pwId*/
+        )
+    {
+        return S_OK;
+    }
+
 protected:
     CBalBaseBAFunctions(
         __in HMODULE hModule,
diff --git a/src/api/burn/balutil/inc/BalBaseBAFunctionsProc.h b/src/api/burn/balutil/inc/BalBaseBAFunctionsProc.h
index 8d1227fc..efe22ddd 100644
--- a/src/api/burn/balutil/inc/BalBaseBAFunctionsProc.h
+++ b/src/api/burn/balutil/inc/BalBaseBAFunctionsProc.h
@@ -24,6 +24,15 @@ static HRESULT BalBaseBAFunctionsProcWndProc(
     return pBAFunctions->WndProc(pArgs->pTheme, pArgs->hWnd, pArgs->uMsg, pArgs->wParam, pArgs->lParam, &pResults->lres);
 }
 
+static HRESULT BalBaseBAFunctionsProcOnThemeControlLoading(
+    __in IBAFunctions* pBAFunctions,
+    __in BA_FUNCTIONS_ONTHEMECONTROLLOADING_ARGS* pArgs,
+    __inout BA_FUNCTIONS_ONTHEMECONTROLLOADING_RESULTS* pResults
+    )
+{
+    return pBAFunctions->OnThemeControlLoading(pArgs->wzName, &pResults->fProcessed, &pResults->wId);
+}
+
 /*******************************************************************
 BalBaseBAFunctionsProc - requires pvContext to be of type IBAFunctions.
 Provides a default mapping between the message based BAFunctions interface and
@@ -125,6 +134,9 @@ static HRESULT WINAPI BalBaseBAFunctionsProc(
         case BA_FUNCTIONS_MESSAGE_WNDPROC:
             hr = BalBaseBAFunctionsProcWndProc(pBAFunctions, reinterpret_cast<BA_FUNCTIONS_WNDPROC_ARGS*>(pvArgs), reinterpret_cast<BA_FUNCTIONS_WNDPROC_RESULTS*>(pvResults));
             break;
+        case BA_FUNCTIONS_MESSAGE_ONTHEMECONTROLLOADING:
+            hr = BalBaseBAFunctionsProcOnThemeControlLoading(pBAFunctions, reinterpret_cast<BA_FUNCTIONS_ONTHEMECONTROLLOADING_ARGS*>(pvArgs), reinterpret_cast<BA_FUNCTIONS_ONTHEMECONTROLLOADING_RESULTS*>(pvResults));
+            break;
         }
     }
 
diff --git a/src/api/burn/balutil/inc/IBAFunctions.h b/src/api/burn/balutil/inc/IBAFunctions.h
index 7d8a07fa..d41b7c9b 100644
--- a/src/api/burn/balutil/inc/IBAFunctions.h
+++ b/src/api/burn/balutil/inc/IBAFunctions.h
@@ -31,4 +31,12 @@ DECLARE_INTERFACE_IID_(IBAFunctions, IBootstrapperApplication, "0FB445ED-17BD-49
         __inout LPVOID pvResults,
         __in_opt LPVOID pvContext
         ) = 0;
+
+    // OnThemeControlLoading - Called while creating a control for the theme.
+    //
+    STDMETHOD(OnThemeControlLoading)(
+        __in LPCWSTR wzName,
+        __inout BOOL* pfProcessed,
+        __inout WORD* pwId
+        ) = 0;
 };
-- 
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