dlls/comctl32/theming.c

   1 /*
   2  * Theming - Initialization
   3  *
   4  * Copyright (c) 2005 by Frank Richter
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "comctl32.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(theming);
  32
  33 typedef LRESULT (CALLBACK* THEMING_SUBCLASSPROC)(HWND, UINT, WPARAM, LPARAM,
  34     ULONG_PTR);
  35
  36 extern LRESULT CALLBACK THEMING_DialogSubclassProc (HWND, UINT, WPARAM, LPARAM,
  37                                                     ULONG_PTR) DECLSPEC_HIDDEN;
  38 extern LRESULT CALLBACK THEMING_ScrollbarSubclassProc (HWND, UINT, WPARAM, LPARAM,
  39                                                        ULONG_PTR) DECLSPEC_HIDDEN;
  40
  41 static const WCHAR dialogClass[] = L"#32770";
  42
  43 static const struct ThemingSubclass
  44 {
  45     const WCHAR* className;
  46     THEMING_SUBCLASSPROC subclassProc;
  47 } subclasses[] = {
  48     /* Note: list must be sorted by class name */
  49     {dialogClass,          THEMING_DialogSubclassProc},
  50     {WC_SCROLLBARW,        THEMING_ScrollbarSubclassProc}
  51 };
  52
  53 #define NUM_SUBCLASSES        (ARRAY_SIZE(subclasses))
  54
  55 static WNDPROC originalProcs[NUM_SUBCLASSES];
  56 static ATOM atRefDataProp;
  57 static ATOM atSubclassProp;
  58
  59 /* Generate a number of subclass window procs.
  60  * With a single proc alone, we can't really reliably find out the superclass,
  61  * so have one for each subclass. The subclass number is also stored in a prop
  62  * since it's needed by THEMING_CallOriginalClass(). Then, the subclass
  63  * proc and ref data are fetched and the proc called.
  64  */
  65 #define MAKE_SUBCLASS_PROC(N)                                               \
  66 static LRESULT CALLBACK subclass_proc ## N (HWND wnd, UINT msg,             \
  67                                             WPARAM wParam, LPARAM lParam)   \
  68 {                                                                           \
  69     LRESULT result;                                                         \
  70     ULONG_PTR refData;                                                      \
  71     SetPropW (wnd, (LPCWSTR)MAKEINTATOM(atSubclassProp), (HANDLE)N);        \
  72     refData = (ULONG_PTR)GetPropW (wnd, (LPCWSTR)MAKEINTATOM(atRefDataProp)); \
  73     TRACE ("%d; (%p, %x, %lx, %lx, %lx)\n", N, wnd, msg, wParam, lParam,     \
  74         refData);                                                           \
  75     result = subclasses[N].subclassProc (wnd, msg, wParam, lParam, refData);\
  76     TRACE ("result = %lx\n", result);                                       \
  77     return result;                                                          \
  78 }
  79
  80 MAKE_SUBCLASS_PROC(0)
  81 MAKE_SUBCLASS_PROC(1)
  82
  83 static const WNDPROC subclassProcs[NUM_SUBCLASSES] = {
  84     subclass_proc0,
  85     subclass_proc1,
  86 };
  87
  88 /***********************************************************************
  89  * THEMING_Initialize
  90  *
  91  * Register classes for standard controls that will shadow the system
  92  * classes.
  93  */
  94 void THEMING_Initialize (void)
  95 {
  96     unsigned int i;
  97
  98     atSubclassProp = GlobalAddAtomW (L"CC32ThemingSubCl");
  99     atRefDataProp = GlobalAddAtomW (L"CC32ThemingData");
 100
 101     for (i = 0; i < NUM_SUBCLASSES; i++)
 102     {
 103         WNDCLASSEXW class;
 104
 105         class.cbSize = sizeof(class);
 106         if (!GetClassInfoExW (NULL, subclasses[i].className, &class))
 107         {
 108             ERR("Could not retrieve information for class %s\n",
 109                 debugstr_w (subclasses[i].className));
 110             continue;
 111         }
 112         originalProcs[i] = class.lpfnWndProc;
 113         class.lpfnWndProc = subclassProcs[i];
 114
 115         if (!class.lpfnWndProc)
 116         {
 117             ERR("Missing proc for class %s\n",
 118                 debugstr_w (subclasses[i].className));
 119             continue;
 120         }
 121
 122         if (!RegisterClassExW (&class))
 123         {
 124             ERR("Could not re-register class %s: %x\n",
 125                 debugstr_w (subclasses[i].className), GetLastError ());
 126         }
 127         else
 128         {
 129             TRACE("Re-registered class %s\n",
 130                 debugstr_w (subclasses[i].className));
 131         }
 132     }
 133 }
 134
 135 /***********************************************************************
 136  * THEMING_Uninitialize
 137  *
 138  * Unregister shadow classes for standard controls.
 139  */
 140 void THEMING_Uninitialize (void)
 141 {
 142     unsigned int i;
 143
 144     if (!atSubclassProp) return;  /* not initialized */
 145
 146     for (i = 0; i < NUM_SUBCLASSES; i++)
 147     {
 148         UnregisterClassW (subclasses[i].className, NULL);
 149     }
 150 }
 151
 152 /***********************************************************************
 153  * THEMING_CallOriginalClass
 154  *
 155  * Determines the original window proc and calls it.
 156  */
 157 LRESULT THEMING_CallOriginalClass (HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
 158 {
 159     INT_PTR subclass = (INT_PTR)GetPropW (wnd, (LPCWSTR)MAKEINTATOM(atSubclassProp));
 160     WNDPROC oldProc = originalProcs[subclass];
 161     return CallWindowProcW (oldProc, wnd, msg, wParam, lParam);
 162 }