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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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_ComboSubclassProc (HWND, UINT, WPARAM, LPARAM,
  37                                                    ULONG_PTR);
  38 extern LRESULT CALLBACK THEMING_DialogSubclassProc (HWND, UINT, WPARAM, LPARAM,
  39                                                     ULONG_PTR);
  40 extern LRESULT CALLBACK THEMING_EditSubclassProc (HWND, UINT, WPARAM, LPARAM,
  41                                                   ULONG_PTR);
  42 extern LRESULT CALLBACK THEMING_ListBoxSubclassProc (HWND, UINT, WPARAM, LPARAM,
  43                                                      ULONG_PTR);
  44
  45 static const WCHAR dialogClass[] = {'#','3','2','7','7','0',0};
  46 static const WCHAR comboLboxClass[] = {'C','o','m','b','o','L','b','o','x',0};
  47
  48 static const struct ThemingSubclass
  49 {
  50     const WCHAR* className;
  51     THEMING_SUBCLASSPROC subclassProc;
  52 } subclasses[] = {
  53     /* Note: list must be sorted by class name */
  54     {dialogClass,          THEMING_DialogSubclassProc},
  55     {WC_COMBOBOXW,         THEMING_ComboSubclassProc},
  56     {comboLboxClass,       THEMING_ListBoxSubclassProc},
  57     {WC_EDITW,             THEMING_EditSubclassProc},
  58     {WC_LISTBOXW,          THEMING_ListBoxSubclassProc}
  59 };
  60
  61 #define NUM_SUBCLASSES        (sizeof(subclasses)/sizeof(subclasses[0]))
  62
  63 static WNDPROC originalProcs[NUM_SUBCLASSES];
  64 static ATOM atRefDataProp;
  65 static ATOM atSubclassProp;
  66
  67 /* Generate a number of subclass window procs.
  68  * With a single proc alone, we can't really reliably find out the superclass,
  69  * so have one for each subclass. The subclass number is also stored in a prop
  70  * since it's needed by THEMING_CallOriginalClass(). Then, the the subclass
  71  * proc and ref data are fetched and the proc called.
  72  */
  73 #define MAKE_SUBCLASS_PROC(N)                                               \
  74 static LRESULT CALLBACK subclass_proc ## N (HWND wnd, UINT msg,             \
  75                                             WPARAM wParam, LPARAM lParam)   \
  76 {                                                                           \
  77     LRESULT result;                                                         \
  78     ULONG_PTR refData;                                                      \
  79     SetPropW (wnd, MAKEINTATOMW (atSubclassProp), (HANDLE)N);               \
  80     refData = (ULONG_PTR)GetPropW (wnd, MAKEINTATOMW (atRefDataProp));      \
  81     TRACE ("%d; (%p, %x, %x, %lx, %lx)\n", N, wnd, msg, wParam, lParam,     \
  82         refData);                                                           \
  83     result = subclasses[N].subclassProc (wnd, msg, wParam, lParam, refData);\
  84     TRACE ("result = %lx\n", result);                                       \
  85     return result;                                                          \
  86 }
  87
  88 MAKE_SUBCLASS_PROC(0)
  89 MAKE_SUBCLASS_PROC(1)
  90 MAKE_SUBCLASS_PROC(2)
  91 MAKE_SUBCLASS_PROC(3)
  92 MAKE_SUBCLASS_PROC(4)
  93
  94 const static WNDPROC subclassProcs[NUM_SUBCLASSES] = {
  95     subclass_proc0,
  96     subclass_proc1,
  97     subclass_proc2,
  98     subclass_proc3,
  99     subclass_proc4
 100 };
 101
 102 /***********************************************************************
 103  * THEMING_Initialize
 104  *
 105  * Register classes for standard controls that will shadow the system
 106  * classes.
 107  */
 108 void THEMING_Initialize (void)
 109 {
 110     int i;
 111     static const WCHAR subclassPropName[] =
 112         { 'C','C','3','2','T','h','e','m','i','n','g','S','u','b','C','l',0 };
 113     static const WCHAR refDataPropName[] =
 114         { 'C','C','3','2','T','h','e','m','i','n','g','D','a','t','a',0 };
 115
 116     atSubclassProp = GlobalAddAtomW (subclassPropName);
 117     atRefDataProp = GlobalAddAtomW (refDataPropName);
 118
 119     for (i = 0; i < NUM_SUBCLASSES; i++)
 120     {
 121         WNDCLASSEXW class;
 122
 123         class.cbSize = sizeof(class);
 124         class.style |= CS_GLOBALCLASS;
 125         GetClassInfoExW (NULL, subclasses[i].className, &class);
 126         originalProcs[i] = class.lpfnWndProc;
 127         class.lpfnWndProc = subclassProcs[i];
 128
 129         if (!class.lpfnWndProc)
 130         {
 131             ERR("Missing proc for class %s\n",
 132                 debugstr_w (subclasses[i].className));
 133             continue;
 134         }
 135
 136         if (!RegisterClassExW (&class))
 137         {
 138             ERR("Could not re-register class %s: %lx\n",
 139                 debugstr_w (subclasses[i].className), GetLastError ());
 140         }
 141         else
 142         {
 143             TRACE("Re-registered class %s\n",
 144                 debugstr_w (subclasses[i].className));
 145         }
 146     }
 147 }
 148
 149 /***********************************************************************
 150  * THEMING_Uninitialize
 151  *
 152  * Unregister shadow classes for standard controls.
 153  */
 154 void THEMING_Uninitialize (void)
 155 {
 156     int i;
 157     for (i = 0; i < NUM_SUBCLASSES; i++)
 158     {
 159         UnregisterClassW (subclasses[i].className, NULL);
 160     }
 161 }
 162
 163 /***********************************************************************
 164  * THEMING_CallOriginalClass
 165  *
 166  * Determines the original window proc and calls it.
 167  */
 168 LRESULT THEMING_CallOriginalClass (HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
 169 {
 170     INT_PTR subclass = (INT_PTR)GetPropW (wnd, MAKEINTATOMW (atSubclassProp));
 171     WNDPROC oldProc = originalProcs[subclass];
 172     return CallWindowProcW (oldProc, wnd, msg, wParam, lParam);
 173 }
 174
 175 /***********************************************************************
 176  * THEMING_SetSubclassData
 177  *
 178  * Update the "refData" value of the subclassed window.
 179  */
 180 void THEMING_SetSubclassData (HWND wnd, ULONG_PTR refData)
 181 {
 182     SetPropW (wnd, MAKEINTATOMW (atRefDataProp), (HANDLE)refData);
 183 }