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