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 "uxtheme.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(theming);
  33
  34 typedef LRESULT (CALLBACK* THEMING_SUBCLASSPROC)(HWND, UINT, WPARAM, LPARAM,
  35     ULONG_PTR);
  36
  37 extern LRESULT CALLBACK THEMING_ButtonSubclassProc (HWND, UINT, WPARAM, LPARAM,
  38                                                     ULONG_PTR);
  39 extern LRESULT CALLBACK THEMING_ComboSubclassProc (HWND, UINT, WPARAM, LPARAM,
  40                                                    ULONG_PTR);
  41 extern LRESULT CALLBACK THEMING_DialogSubclassProc (HWND, UINT, WPARAM, LPARAM,
  42                                                     ULONG_PTR);
  43 extern LRESULT CALLBACK THEMING_EditSubclassProc (HWND, UINT, WPARAM, LPARAM,
  44                                                   ULONG_PTR);
  45 extern LRESULT CALLBACK THEMING_ListBoxSubclassProc (HWND, UINT, WPARAM, LPARAM,
  46                                                      ULONG_PTR);
  47
  48 static const WCHAR dialogClass[] = {'#','3','2','7','7','0',0};
  49 static const WCHAR comboLboxClass[] = {'C','o','m','b','o','L','b','o','x',0};
  50
  51 static const struct ThemingSubclass
  52 {
  53     const WCHAR* className;
  54     THEMING_SUBCLASSPROC subclassProc;
  55 } subclasses[] = {
  56     /* Note: list must be sorted by class name */
  57     {dialogClass,          THEMING_DialogSubclassProc},
  58     {WC_BUTTONW,           THEMING_ButtonSubclassProc},
  59     {WC_COMBOBOXW,         THEMING_ComboSubclassProc},
  60     {comboLboxClass,       THEMING_ListBoxSubclassProc},
  61     {WC_EDITW,             THEMING_EditSubclassProc},
  62     {WC_LISTBOXW,          THEMING_ListBoxSubclassProc}
  63 };
  64
  65 #define NUM_SUBCLASSES        (sizeof(subclasses)/sizeof(subclasses[0]))
  66
  67 static WNDPROC originalProcs[NUM_SUBCLASSES];
  68 static ATOM atRefDataProp;
  69 static ATOM atSubclassProp;
  70
  71 /* Generate a number of subclass window procs.
  72  * With a single proc alone, we can't really reliably find out the superclass,
  73  * so have one for each subclass. The subclass number is also stored in a prop
  74  * since it's needed by THEMING_CallOriginalClass(). Then, the subclass
  75  * proc and ref data are fetched and the proc called.
  76  */
  77 #define MAKE_SUBCLASS_PROC(N)                                               \
  78 static LRESULT CALLBACK subclass_proc ## N (HWND wnd, UINT msg,             \
  79                                             WPARAM wParam, LPARAM lParam)   \
  80 {                                                                           \
  81     LRESULT result;                                                         \
  82     ULONG_PTR refData;                                                      \
  83     SetPropW (wnd, (LPCWSTR)MAKEINTATOM(atSubclassProp), (HANDLE)N);        \
  84     refData = (ULONG_PTR)GetPropW (wnd, (LPCWSTR)MAKEINTATOM(atRefDataProp)); \
  85     TRACE ("%d; (%p, %x, %lx, %lx, %lx)\n", N, wnd, msg, wParam, lParam,     \
  86         refData);                                                           \
  87     result = subclasses[N].subclassProc (wnd, msg, wParam, lParam, refData);\
  88     TRACE ("result = %lx\n", result);                                       \
  89     return result;                                                          \
  90 }
  91
  92 MAKE_SUBCLASS_PROC(0)
  93 MAKE_SUBCLASS_PROC(1)
  94 MAKE_SUBCLASS_PROC(2)
  95 MAKE_SUBCLASS_PROC(3)
  96 MAKE_SUBCLASS_PROC(4)
  97 MAKE_SUBCLASS_PROC(5)
  98
  99 static const WNDPROC subclassProcs[NUM_SUBCLASSES] = {
 100     subclass_proc0,
 101     subclass_proc1,
 102     subclass_proc2,
 103     subclass_proc3,
 104     subclass_proc4,
 105     subclass_proc5
 106 };
 107
 108 /***********************************************************************
 109  * THEMING_Initialize
 110  *
 111  * Register classes for standard controls that will shadow the system
 112  * classes.
 113  */
 114 void THEMING_Initialize (void)
 115 {
 116     unsigned int i;
 117     static const WCHAR subclassPropName[] =
 118         { 'C','C','3','2','T','h','e','m','i','n','g','S','u','b','C','l',0 };
 119     static const WCHAR refDataPropName[] =
 120         { 'C','C','3','2','T','h','e','m','i','n','g','D','a','t','a',0 };
 121
 122     if (!IsThemeActive()) return;
 123
 124     atSubclassProp = GlobalAddAtomW (subclassPropName);
 125     atRefDataProp = GlobalAddAtomW (refDataPropName);
 126
 127     for (i = 0; i < NUM_SUBCLASSES; i++)
 128     {
 129         WNDCLASSEXW class;
 130
 131         class.cbSize = sizeof(class);
 132         class.style |= CS_GLOBALCLASS;
 133         GetClassInfoExW (NULL, subclasses[i].className, &class);
 134         originalProcs[i] = class.lpfnWndProc;
 135         class.lpfnWndProc = subclassProcs[i];
 136
 137         if (!class.lpfnWndProc)
 138         {
 139             ERR("Missing proc for class %s\n",
 140                 debugstr_w (subclasses[i].className));
 141             continue;
 142         }
 143
 144         if (!RegisterClassExW (&class))
 145         {
 146             ERR("Could not re-register class %s: %x\n",
 147                 debugstr_w (subclasses[i].className), GetLastError ());
 148         }
 149         else
 150         {
 151             TRACE("Re-registered class %s\n",
 152                 debugstr_w (subclasses[i].className));
 153         }
 154     }
 155 }
 156
 157 /***********************************************************************
 158  * THEMING_Uninitialize
 159  *
 160  * Unregister shadow classes for standard controls.
 161  */
 162 void THEMING_Uninitialize (void)
 163 {
 164     unsigned int i;
 165
 166     if (!atSubclassProp) return;  /* not initialized */
 167
 168     for (i = 0; i < NUM_SUBCLASSES; i++)
 169     {
 170         UnregisterClassW (subclasses[i].className, NULL);
 171     }
 172 }
 173
 174 /***********************************************************************
 175  * THEMING_CallOriginalClass
 176  *
 177  * Determines the original window proc and calls it.
 178  */
 179 LRESULT THEMING_CallOriginalClass (HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
 180 {
 181     INT_PTR subclass = (INT_PTR)GetPropW (wnd, (LPCWSTR)MAKEINTATOM(atSubclassProp));
 182     WNDPROC oldProc = originalProcs[subclass];
 183     return CallWindowProcW (oldProc, wnd, msg, wParam, lParam);
 184 }
 185
 186 /***********************************************************************
 187  * THEMING_SetSubclassData
 188  *
 189  * Update the "refData" value of the subclassed window.
 190  */
 191 void THEMING_SetSubclassData (HWND wnd, ULONG_PTR refData)
 192 {
 193     SetPropW (wnd, (LPCWSTR)MAKEINTATOM(atRefDataProp), (HANDLE)refData);
 194 }