windows/syscolor.c

   1 /*
   2  * Support for system colors
   3  *
   4  * Copyright  David W. Metcalfe, 1993
   5  * Copyright  Alexandre Julliard, 1994
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <assert.h>
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "wine/winbase16.h"
  31 #include "wine/winuser16.h"
  32 #include "winuser.h"
  33 #include "wownt32.h"
  34 #include "winreg.h"
  35 #include "local.h"
  36 #include "gdi.h" /* sic */
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(syscolor);
  40
  41 static const char * const DefSysColors[] =
  42 {
  43     "Scrollbar", "192 192 192",      /* COLOR_SCROLLBAR           */
  44     "Background", "0 128 128",       /* COLOR_BACKGROUND          */
  45     "ActiveTitle", "0 0 128",        /* COLOR_ACTIVECAPTION       */
  46     "InactiveTitle", "128 128 128",  /* COLOR_INACTIVECAPTION     */
  47     "Menu", "192 192 192",           /* COLOR_MENU                */
  48     "Window", "255 255 255",         /* COLOR_WINDOW              */
  49     "WindowFrame", "0 0 0",          /* COLOR_WINDOWFRAME         */
  50     "MenuText", "0 0 0",             /* COLOR_MENUTEXT            */
  51     "WindowText", "0 0 0",           /* COLOR_WINDOWTEXT          */
  52     "TitleText", "255 255 255",      /* COLOR_CAPTIONTEXT         */
  53     "ActiveBorder", "192 192 192",   /* COLOR_ACTIVEBORDER        */
  54     "InactiveBorder", "192 192 192", /* COLOR_INACTIVEBORDER      */
  55     "AppWorkSpace", "128 128 128",   /* COLOR_APPWORKSPACE        */
  56     "Hilight", "0 0 128",            /* COLOR_HIGHLIGHT           */
  57     "HilightText", "255 255 255",    /* COLOR_HIGHLIGHTTEXT       */
  58     "ButtonFace", "192 192 192",     /* COLOR_BTNFACE             */
  59     "ButtonShadow", "128 128 128",   /* COLOR_BTNSHADOW           */
  60     "GrayText", "128 128 128",       /* COLOR_GRAYTEXT            */
  61     "ButtonText", "0 0 0",           /* COLOR_BTNTEXT             */
  62     "InactiveTitleText", "192 192 192",/* COLOR_INACTIVECAPTIONTEXT */
  63     "ButtonHilight", "255 255 255",  /* COLOR_BTNHIGHLIGHT        */
  64     "ButtonDkShadow", "0 0 0",       /* COLOR_3DDKSHADOW          */
  65     "ButtonLight", "224 224 224",    /* COLOR_3DLIGHT             */
  66     "InfoText", "0 0 0",             /* COLOR_INFOTEXT            */
  67     "InfoWindow", "255 255 225",     /* COLOR_INFOBK              */
  68     "ButtonAlternateFace", "180 180 180",  /* COLOR_ALTERNATEBTNFACE */
  69     "HotTrackingColor", "0 0 255",         /* COLOR_HOTLIGHT */
  70     "GradientActiveTitle", "16 132 208",   /* COLOR_GRADIENTACTIVECAPTION */
  71     "GradientInactiveTitle", "181 181 181",/* COLOR_GRADIENTINACTIVECAPTION */
  72     "MenuHilight", "0 0 0",          /* COLOR_MENUHILIGHT         */
  73     "MenuBar", "192 192 192"         /* COLOR_MENUBAR             */
  74 };
  75
  76
  77 #define NUM_SYS_COLORS     (COLOR_MENUBAR+1)
  78
  79 static COLORREF SysColors[NUM_SYS_COLORS];
  80 static HBRUSH SysColorBrushes[NUM_SYS_COLORS];
  81 static HPEN   SysColorPens[NUM_SYS_COLORS];
  82
  83
  84 /*************************************************************************
  85  * SYSCOLOR_MakeObjectSystem
  86  *
  87  * OK, now for a very ugly hack.
  88  * USER somehow has to tell GDI that its system brushes and pens are
  89  * non-deletable.
  90  * We don't want to export a function from GDI doing this for us,
  91  * so we just do that ourselves by "wildly flipping some bits in memory".
  92  * For a description of the GDI object magics and their flags,
  93  * see "Undocumented Windows" (wrong about the OBJECT_NOSYSTEM flag, though).
  94  */
  95 static void SYSCOLOR_MakeObjectSystem( HGDIOBJ16 handle, BOOL set)
  96 {
  97     static WORD heap_sel = 0;
  98     LPWORD ptr;
  99
 100     if (!heap_sel) heap_sel = LoadLibrary16( "gdi" );
 101     if (heap_sel >= 32)
 102     {
 103         ptr = (LPWORD)LOCAL_Lock(heap_sel, handle);
 104
 105         /* touch the "system" bit of the wMagic field of a GDIOBJHDR */
 106         if (set)
 107             *(ptr+1) &= ~OBJECT_NOSYSTEM;
 108         else
 109             *(ptr+1) |= OBJECT_NOSYSTEM;
 110         LOCAL_Unlock( heap_sel, handle );
 111     }
 112 }
 113
 114 /*************************************************************************
 115  *             SYSCOLOR_SetColor
 116  */
 117 static void SYSCOLOR_SetColor( int index, COLORREF color )
 118 {
 119     if (index < 0 || index >= NUM_SYS_COLORS) return;
 120     SysColors[index] = color;
 121     if (SysColorBrushes[index])
 122     {
 123         SYSCOLOR_MakeObjectSystem( HBRUSH_16(SysColorBrushes[index]), FALSE);
 124         DeleteObject( SysColorBrushes[index] );
 125     }
 126     SysColorBrushes[index] = CreateSolidBrush( color );
 127     SYSCOLOR_MakeObjectSystem( HBRUSH_16(SysColorBrushes[index]), TRUE);
 128
 129     if (SysColorPens[index])
 130     {
 131         SYSCOLOR_MakeObjectSystem( HPEN_16(SysColorPens[index]), FALSE);
 132         DeleteObject( SysColorPens[index] );
 133     }
 134     SysColorPens[index] = CreatePen( PS_SOLID, 1, color );
 135     SYSCOLOR_MakeObjectSystem( HPEN_16(SysColorPens[index]), TRUE);
 136 }
 137
 138
 139 /*************************************************************************
 140  *             SYSCOLOR_Init
 141  */
 142 void SYSCOLOR_Init(void)
 143 {
 144     int i, r, g, b;
 145     char buffer[100];
 146     BOOL bOk = FALSE, bNoReg = FALSE;
 147     HKEY  hKey;
 148
 149     /* first, try to read the values from the registry */
 150     if (RegCreateKeyExA(HKEY_CURRENT_USER, "Control Panel\\Colors", 0, 0, 0, KEY_ALL_ACCESS, 0, &hKey, 0))
 151       bNoReg = TRUE;
 152     for (i = 0; i < NUM_SYS_COLORS; i++)
 153     { bOk = FALSE;
 154
 155       /* first try, registry */
 156       if (!bNoReg)
 157       {
 158         DWORD dwDataSize = sizeof(buffer);
 159         if (!(RegQueryValueExA(hKey,DefSysColors[i*2], 0, 0, buffer, &dwDataSize)))
 160           if (sscanf( buffer, "%d %d %d", &r, &g, &b ) == 3)
 161             bOk = TRUE;
 162       }
 163
 164       /* second try, win.ini */
 165       if (!bOk)
 166       { GetProfileStringA( "colors", DefSysColors[i*2], DefSysColors[i*2+1], buffer, 100 );
 167         if (sscanf( buffer, " %d %d %d", &r, &g, &b ) == 3)
 168           bOk = TRUE;
 169       }
 170
 171       /* last chance, take the default */
 172       if (!bOk)
 173       { int iNumColors = sscanf( DefSysColors[i*2+1], " %d %d %d", &r, &g, &b );
 174         assert (iNumColors==3);
 175       }
 176
 177       SYSCOLOR_SetColor( i, RGB(r,g,b) );
 178     }
 179     if (!bNoReg)
 180       RegCloseKey(hKey);
 181 }
 182
 183
 184 /*************************************************************************
 185  *              GetSysColor (USER32.@)
 186  */
 187 COLORREF WINAPI GetSysColor( INT nIndex )
 188 {
 189     if (nIndex >= 0 && nIndex < NUM_SYS_COLORS)
 190         return SysColors[nIndex];
 191     else
 192         return 0;
 193 }
 194
 195
 196 /*************************************************************************
 197  *              SetSysColors (USER32.@)
 198  */
 199 BOOL WINAPI SetSysColors( INT nChanges, const INT *lpSysColor,
 200                               const COLORREF *lpColorValues )
 201 {
 202     int i;
 203
 204     for (i = 0; i < nChanges; i++)
 205     {
 206         SYSCOLOR_SetColor( lpSysColor[i], lpColorValues[i] );
 207     }
 208
 209     /* Send WM_SYSCOLORCHANGE message to all windows */
 210
 211     SendMessageTimeoutW( HWND_BROADCAST, WM_SYSCOLORCHANGE, 0, 0,
 212                          SMTO_ABORTIFHUNG, 2000, NULL );
 213
 214     /* Repaint affected portions of all visible windows */
 215
 216     RedrawWindow( GetDesktopWindow(), NULL, 0,
 217                 RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW | RDW_ALLCHILDREN );
 218     return TRUE;
 219 }
 220
 221 /*************************************************************************
 222  *              SetSysColorsTemp (USER32.@)
 223  *
 224  * UNDOCUMENTED !!
 225  *
 226  * Called by W98SE desk.cpl Control Panel Applet:
 227  * handle = SetSysColorsTemp(ptr, ptr, nCount);     ("set" call)
 228  * result = SetSysColorsTemp(NULL, NULL, handle);   ("restore" call)
 229  *
 230  * pPens is an array of COLORREF values, which seems to be used
 231  * to indicate the color values to create new pens with.
 232  *
 233  * pBrushes is an array of solid brush handles (returned by a previous
 234  * CreateSolidBrush), which seems to contain the brush handles to set
 235  * for the system colors.
 236  *
 237  * n seems to be used for
 238  *   a) indicating the number of entries to operate on (length of pPens,
 239  *      pBrushes)
 240  *   b) passing the handle that points to the previously used color settings.
 241  *      I couldn't figure out in hell what kind of handle this is on
 242  *      Windows. I just use a heap handle instead. Shouldn't matter anyway.
 243  *
 244  * RETURNS
 245  *     heap handle of our own copy of the current syscolors in case of
 246  *                 "set" call, i.e. pPens, pBrushes != NULL.
 247  *     TRUE (unconditionally !) in case of "restore" call,
 248  *          i.e. pPens, pBrushes == NULL.
 249  *     FALSE in case of either pPens != NULL and pBrushes == NULL
 250  *          or pPens == NULL and pBrushes != NULL.
 251  *
 252  * I'm not sure whether this implementation is 100% correct. [AM]
 253  */
 254 DWORD WINAPI SetSysColorsTemp( const COLORREF *pPens, const HBRUSH *pBrushes, DWORD n)
 255 {
 256         int i;
 257
 258         if (pPens && pBrushes) /* "set" call */
 259         {
 260             /* allocate our structure to remember old colors */
 261             LPVOID pOldCol = HeapAlloc(GetProcessHeap(), 0, sizeof(DWORD)+n*sizeof(HPEN)+n*sizeof(HBRUSH));
 262             LPVOID p = pOldCol;
 263            *(DWORD *)p = n; p = (char*)p + sizeof(DWORD);
 264            memcpy(p, SysColorPens, n*sizeof(HPEN)); p = (char*)p + n*sizeof(HPEN);
 265            memcpy(p, SysColorBrushes, n*sizeof(HBRUSH)); p = (char*)p + n*sizeof(HBRUSH);
 266
 267             for (i=0; i < n; i++)
 268             {
 269                 SysColorPens[i] = CreatePen( PS_SOLID, 1, pPens[i] );
 270                 SysColorBrushes[i] = pBrushes[i];
 271             }
 272
 273             return (DWORD)pOldCol;
 274         }
 275         if ((!pPens) && (!pBrushes)) /* "restore" call */
 276         {
 277             LPVOID pOldCol = (LPVOID)n;
 278             LPVOID p = pOldCol;
 279             DWORD nCount = *(DWORD *)p;
 280            p = (char*)p + sizeof(DWORD);
 281
 282             for (i=0; i < nCount; i++)
 283             {
 284                 DeleteObject(SysColorPens[i]);
 285                SysColorPens[i] = *(HPEN *)p; p = (char*)p + sizeof(HPEN);
 286             }
 287             for (i=0; i < nCount; i++)
 288             {
 289                SysColorBrushes[i] = *(HBRUSH *)p; p = (char*)p + sizeof(HBRUSH);
 290             }
 291             /* get rid of storage structure */
 292             HeapFree(GetProcessHeap(), 0, pOldCol);
 293
 294             return TRUE;
 295         }
 296         return FALSE;
 297 }
 298
 299 /***********************************************************************
 300  *              GetSysColorBrush (USER32.@)
 301  */
 302 HBRUSH WINAPI GetSysColorBrush( INT index )
 303 {
 304     if (0 <= index && index < NUM_SYS_COLORS)
 305         return SysColorBrushes[index];
 306     WARN("Unknown index(%d)\n", index );
 307     return GetStockObject(LTGRAY_BRUSH);
 308 }
 309
 310
 311 /***********************************************************************
 312  *              SYSCOLOR_GetPen
 313  */
 314 HPEN SYSCOLOR_GetPen( INT index )
 315 {
 316     /* We can assert here, because this function is internal to Wine */
 317     assert (0 <= index && index < NUM_SYS_COLORS);
 318     return SysColorPens[index];
 319
 320 }