commctrl.c

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 * RETURNS
 *      Language ID in use by the current process.
 */
LANGID WINAPI GetMUILanguage (VOID)
{
    return COMCTL32_uiLang;
}


/*************************************************************************
 * InitMUILanguage [COMCTL32.@]
 *
 * Sets the user interface language to be used by the current process.
 *
 * RETURNS
 *      Nothing.
 */
VOID WINAPI InitMUILanguage (LANGID uiLang)
{
   COMCTL32_uiLang = uiLang;
}


/***********************************************************************
 * SetWindowSubclass [COMCTL32.410]
 *
 * Starts a window subclass
 *
 * PARAMS
 *     hWnd [in] handle to window subclass.
 *     pfnSubclass [in] Pointer to new window procedure.
 *     uIDSubclass [in] Unique identifier of sublass together with pfnSubclass.
 *     dwRef [in] Reference data to pass to window procedure.
 *
 * RETURNS
 *     Success: non-zero
 *     Failure: zero
 *
 * BUGS
 *     If an application manually subclasses a window after subclassing it with
 *     this API and then with this API again, then none of the previous 
 *     subclasses get called or the origional window procedure.
 */

BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
                        UINT_PTR uIDSubclass, DWORD_PTR dwRef)
{
   LPSUBCLASS_INFO stack;
   LPSUBCLASSPROCS proc;

   TRACE ("(%p, %p, %x, %lx)\n", hWnd, pfnSubclass, uIDSubclass, dwRef);

   /* Since the window procedure that we set here has two additional arguments,
    * we can't simply set it as the new window procedure of the window. So we
    * set our own window procedure and then calculate the other two arguments
    * from there. */

   /* See if we have been called for this window */
   stack = (LPSUBCLASS_INFO)GetPropW (hWnd, COMCTL32_wSubclass);
   if (!stack) {
      /* allocate stack */
      stack = Alloc (sizeof(SUBCLASS_INFO));
      if (!stack) {
         ERR ("Failed to allocate our Subclassing stack\n");
         return FALSE;
      }
      SetPropW (hWnd, COMCTL32_wSubclass, (HANDLE)stack);

      /* set window procedure to our own and save the current one */
      if (IsWindowUnicode (hWnd))
         stack->origproc = (WNDPROC)SetWindowLongPtrW (hWnd, GWLP_WNDPROC,
                                                   (DWORD_PTR)COMCTL32_SubclassProc);
      else
         stack->origproc = (WNDPROC)SetWindowLongPtrA (hWnd, GWLP_WNDPROC,
                                                   (DWORD_PTR)COMCTL32_SubclassProc);
   }
   else {
      /* Check to see if we have called this function with the same uIDSubClass
       * and pfnSubclass */
      proc = stack->SubclassProcs;
      while (proc) {
         if ((proc->id == uIDSubclass) &&
            (proc->subproc == pfnSubclass)) {
            proc->ref = dwRef;
            return TRUE;
         }
         proc = proc->next;
      }
   }
   
   proc = Alloc(sizeof(SUBCLASSPROCS));
   if (!proc) {
      ERR ("Failed to allocate subclass entry in stack\n");
      if (IsWindowUnicode (hWnd))
         SetWindowLongPtrW (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      else
         SetWindowLongPtrA (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      Free (stack);
      RemovePropW( hWnd, COMCTL32_wSubclass );
      return FALSE;
   }
   
   proc->subproc = pfnSubclass;
   proc->ref = dwRef;
   proc->id = uIDSubclass;
   proc->next = stack->SubclassProcs;
   stack->SubclassProcs = proc;

   return TRUE;
}


/***********************************************************************
 * GetWindowSubclass [COMCTL32.411]
 *
 * Gets the Reference data from a subclass.
 *
 * PARAMS
 *     hWnd [in] Handle to window which were subclassing
 *     pfnSubclass [in] Pointer to the subclass procedure
 *     uID [in] Unique indentifier of the subclassing procedure
 *     pdwRef [out] Pointer to the reference data
 *
 * RETURNS
 *     Success: Non-zero
 *     Failure: 0
 */

BOOL WINAPI GetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
                              UINT_PTR uID, DWORD_PTR *pdwRef)
{
   LPSUBCLASS_INFO stack;
   LPSUBCLASSPROCS proc;

   TRACE ("(%p, %p, %x, %p)\n", hWnd, pfnSubclass, uID, pdwRef);

   /* See if we have been called for this window */
   stack = (LPSUBCLASS_INFO)GetPropW (hWnd, COMCTL32_wSubclass);
   if (!stack)
      return FALSE;

   proc = stack->SubclassProcs;
   while (proc) {
      if ((proc->id == uID) &&
         (proc->subproc == pfnSubclass)) {
         *pdwRef = proc->ref;
         return TRUE;
      }
      proc = proc->next;
   }

   return FALSE;
}


/***********************************************************************
 * RemoveWindowSubclass [COMCTL32.412]
 *
 * Removes a window subclass.
 *
 * PARAMS
 *     hWnd [in] Handle to the window were subclassing
 *     pfnSubclass [in] Pointer to the subclass procedure
 *     uID [in] Unique identifier of this subclass
 *
 * RETURNS
 *     Success: non-zero
 *     Failure: zero
 */

BOOL WINAPI RemoveWindowSubclass(HWND hWnd, SUBCLASSPROC pfnSubclass, UINT_PTR uID)
{
   LPSUBCLASS_INFO stack;
   LPSUBCLASSPROCS prevproc = NULL;
   LPSUBCLASSPROCS proc;
   BOOL ret = FALSE;

   TRACE ("(%p, %p, %x)\n", hWnd, pfnSubclass, uID);

   /* Find the Subclass to remove */
   stack = (LPSUBCLASS_INFO)GetPropW (hWnd, COMCTL32_wSubclass);
   if (!stack)
      return FALSE;

   proc = stack->SubclassProcs;
   while (proc) {
      if ((proc->id == uID) &&
         (proc->subproc == pfnSubclass)) {
         
         if (!prevproc)
            stack->SubclassProcs = proc->next;
         else
            prevproc->next = proc->next;
          
         if (stack->stackpos == proc)
            stack->stackpos = stack->stackpos->next;
            
         Free (proc);
         ret = TRUE;
         break;
      }
      prevproc = proc;
      proc = proc->next;
   }
   
   if (!stack->SubclassProcs && !stack->running) {
      TRACE("Last Subclass removed, cleaning up\n");
      /* clean up our heap and reset the origional window procedure */
      if (IsWindowUnicode (hWnd))
         SetWindowLongPtrW (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      else
         SetWindowLongPtrA (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      Free (stack);
      RemovePropW( hWnd, COMCTL32_wSubclass );
   }
   
   return ret;
}

/***********************************************************************
 * COMCTL32_SubclassProc (internal)
 *
 * Window procedure for all subclassed windows. 
 * Saves the current subclassing stack position to support nested messages
 */
LRESULT WINAPI COMCTL32_SubclassProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   LPSUBCLASS_INFO stack;
   LPSUBCLASSPROCS proc;
   LRESULT ret;
    
   TRACE ("(%p, 0x%08x, 0x%08x, 0x%08lx)\n", hWnd, uMsg, wParam, lParam);

   stack = (LPSUBCLASS_INFO)GetPropW (hWnd, COMCTL32_wSubclass);
   if (!stack) {
      ERR ("Our sub classing stack got erased for %p!! Nothing we can do\n", hWnd);
      return 0;
   }
    
   /* Save our old stackpos to properly handle nested messages */
   proc = stack->stackpos;
   stack->stackpos = stack->SubclassProcs;
   stack->running++;
   ret = DefSubclassProc(hWnd, uMsg, wParam, lParam);
   stack->running--;
   stack->stackpos = proc;
    
   if (!stack->SubclassProcs && !stack->running) {
      TRACE("Last Subclass removed, cleaning up\n");
      /* clean up our heap and reset the origional window procedure */
      if (IsWindowUnicode (hWnd))
         SetWindowLongPtrW (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      else
         SetWindowLongPtrA (hWnd, GWLP_WNDPROC, (DWORD_PTR)stack->origproc);
      Free (stack);
      RemovePropW( hWnd, COMCTL32_wSubclass );
   }
   return ret;
}

/***********************************************************************
 * DefSubclassProc [COMCTL32.413]
 *
 * Calls the next window procedure (ie. the one before this subclass)
 *
 * PARAMS
 *     hWnd [in] The window that we're subclassing
 *     uMsg [in] Message
 *     wParam [in] WPARAM
 *     lParam [in] LPARAM
 *
 * RETURNS
 *     Success: non-zero
 *     Failure: zero
 */

LRESULT WINAPI DefSubclassProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   LPSUBCLASS_INFO stack;
   LRESULT ret;
   
   TRACE ("(%p, 0x%08x, 0x%08x, 0x%08lx)\n", hWnd, uMsg, wParam, lParam);

   /* retrieve our little stack from the Properties */
   stack = (LPSUBCLASS_INFO)GetPropW (hWnd, COMCTL32_wSubclass);
   if (!stack) {
      ERR ("Our sub classing stack got erased for %p!! Nothing we can do\n", hWnd);
      return 0;
   }

   /* If we are at the end of stack then we have to call the original
    * window procedure */
   if (!stack->stackpos) {
      if (IsWindowUnicode (hWnd))
         ret = CallWindowProcW (stack->origproc, hWnd, uMsg, wParam, lParam);
      else
         ret = CallWindowProcA (stack->origproc, hWnd, uMsg, wParam, lParam);
   } else {
      LPSUBCLASSPROCS proc = stack->stackpos;
      stack->stackpos = stack->stackpos->next; 
      /* call the Subclass procedure from the stack */
      ret = proc->subproc (hWnd, uMsg, wParam, lParam,
            proc->id, proc->ref);
   }

   return ret;
}


/***********************************************************************
 * COMCTL32_CreateToolTip [NOT AN API]
 *
 * Creates a tooltip for the control specified in hwnd and does all
 * necessary setup and notifications.
 *
 * PARAMS
 *     hwndOwner [I] Handle to the window that will own the tool tip.
 *
 * RETURNS
 *     Success: Handle of tool tip window.
 *     Failure: NULL
 */

HWND
COMCTL32_CreateToolTip(HWND hwndOwner)
{
    HWND hwndToolTip;

    hwndToolTip = CreateWindowExW(0, TOOLTIPS_CLASSW, NULL, 0,
				  CW_USEDEFAULT, CW_USEDEFAULT,
				  CW_USEDEFAULT, CW_USEDEFAULT, hwndOwner,
				  0, 0, 0);

    /* Send NM_TOOLTIPSCREATED notification */
    if (hwndToolTip)
    {
	NMTOOLTIPSCREATED nmttc;
        /* true owner can be different if hwndOwner is a child window */
        HWND hwndTrueOwner = GetWindow(hwndToolTip, GW_OWNER);
        nmttc.hdr.hwndFrom = hwndTrueOwner;
        nmttc.hdr.idFrom = GetWindowLongPtrW(hwndTrueOwner, GWLP_ID);
	nmttc.hdr.code = NM_TOOLTIPSCREATED;
	nmttc.hwndToolTips = hwndToolTip;

       SendMessageW(GetParent(hwndTrueOwner), WM_NOTIFY,
                    (WPARAM)GetWindowLongPtrW(hwndTrueOwner, GWLP_ID),
		    (LPARAM)&nmttc);
    }

    return hwndToolTip;
}


/***********************************************************************
 * COMCTL32_RefreshSysColors [NOT AN API]
 *
 * Invoked on any control recognizing a WM_SYSCOLORCHANGE message to
 * refresh the color values in the color structure
 *
 * PARAMS
 *     none
 *
 * RETURNS
 *     none
 */

VOID
COMCTL32_RefreshSysColors(void)
{
    comctl32_color.clrBtnHighlight = GetSysColor (COLOR_BTNHIGHLIGHT);
    comctl32_color.clrBtnShadow = GetSysColor (COLOR_BTNSHADOW);
    comctl32_color.clrBtnText = GetSysColor (COLOR_BTNTEXT);
    comctl32_color.clrBtnFace = GetSysColor (COLOR_BTNFACE);
    comctl32_color.clrHighlight = GetSysColor (COLOR_HIGHLIGHT);
    comctl32_color.clrHighlightText = GetSysColor (COLOR_HIGHLIGHTTEXT);
    comctl32_color.clr3dHilight = GetSysColor (COLOR_3DHILIGHT);
    comctl32_color.clr3dShadow = GetSysColor (COLOR_3DSHADOW);
    comctl32_color.clr3dDkShadow = GetSysColor (COLOR_3DDKSHADOW);
    comctl32_color.clr3dFace = GetSysColor (COLOR_3DFACE);
    comctl32_color.clrWindow = GetSysColor (COLOR_WINDOW);
    comctl32_color.clrWindowText = GetSysColor (COLOR_WINDOWTEXT);
    comctl32_color.clrGrayText = GetSysColor (COLOR_GRAYTEXT);
    comctl32_color.clrActiveCaption = GetSysColor (COLOR_ACTIVECAPTION);
    comctl32_color.clrInfoBk = GetSysColor (COLOR_INFOBK);
    comctl32_color.clrInfoText = GetSysColor (COLOR_INFOTEXT);
}

/***********************************************************************
 * COMCTL32_DrawInsertMark [NOT AN API]
 *
 * Draws an insertion mark (which looks similar to an 'I').
 *
 * PARAMS
 *     hDC           [I] Device context to draw onto.
 *     lpRect        [I] Co-ordinates of insertion mark.
 *     clrInsertMark [I] Colour of the insertion mark.
 *     bHorizontal   [I] True if insert mark should be drawn horizontally,
 *                       vertical otherwise.
 *
 * RETURNS
 *     none
 *
 * NOTES
 *     Draws up to but not including the bottom co-ordinate when drawing
 *     vertically or the right co-ordinate when horizontal.
 */
void COMCTL32_DrawInsertMark(HDC hDC, const RECT *lpRect, COLORREF clrInsertMark, BOOL bHorizontal)
{
    HPEN hPen = CreatePen(PS_SOLID, 1, clrInsertMark);
    HPEN hOldPen;
    static const DWORD adwPolyPoints[] = {4,4,4};
    LONG lCentre = (bHorizontal ? 
        lpRect->top + (lpRect->bottom - lpRect->top)/2 : 
        lpRect->left + (lpRect->right - lpRect->left)/2);
    LONG l1 = (bHorizontal ? lpRect->left : lpRect->top);
    LONG l2 = (bHorizontal ? lpRect->right : lpRect->bottom);
    const POINT aptInsertMark[] =
    {
        /* top (V) or left (H) arrow */
        {lCentre    , l1 + 2},
        {lCentre - 2, l1    },
        {lCentre + 3, l1    },
        {lCentre + 1, l1 + 2},
        /* middle line */
        {lCentre    , l2 - 2},
        {lCentre    , l1 - 1},
        {lCentre + 1, l1 - 1},
        {lCentre + 1, l2 - 2},
        /* bottom (V) or right (H) arrow */
        {lCentre    , l2 - 3},
        {lCentre - 2, l2 - 1},
        {lCentre + 3, l2 - 1},
        {lCentre + 1, l2 - 3},
    };
    hOldPen = SelectObject(hDC, hPen);
    PolyPolyline(hDC, aptInsertMark, adwPolyPoints, sizeof(adwPolyPoints)/sizeof(adwPolyPoints[0]));
    SelectObject(hDC, hOldPen);
    DeleteObject(hPen);
}

/***********************************************************************
 * MirrorIcon [COMCTL32.414]
 *
 * Mirrors an icon so that it will appear correctly on a mirrored DC.
 *
 * PARAMS
 *     phicon1 [I/O] Icon.
 *     phicon2 [I/O] Icon.
 *
 * RETURNS
 *     Success: TRUE.
 *     Failure: FALSE.
 */
BOOL WINAPI MirrorIcon(HICON *phicon1, HICON *phicon2)
{
    FIXME("(%p, %p): stub\n", phicon1, phicon2);
    return FALSE;
}

static inline int IsDelimiter(WCHAR c)
{
    switch(c)
    {
	case '/':
	case '\\':
	case '.':
	case ' ':
	    return TRUE;
    }
    return FALSE;
}

static int CALLBACK PathWordBreakProc(LPWSTR lpch, int ichCurrent, int cch, int code)
{
    if (code == WB_ISDELIMITER)
        return IsDelimiter(lpch[ichCurrent]);
    else
    {
        int dir = (code == WB_LEFT) ? -1 : 1;
        for(; 0 <= ichCurrent && ichCurrent < cch; ichCurrent += dir)
            if (IsDelimiter(lpch[ichCurrent])) return ichCurrent;
    }
    return ichCurrent;
}

/***********************************************************************
 * SetPathWordBreakProc [COMCTL32.384]
 *
 * Sets the word break procedure for an edit control to one that understands
 * paths so that the user can jump over directories.
 *
 * PARAMS
 *     hwnd [I] Handle to edit control.
 *     bSet [I] If this is TRUE then the word break proc is set, otherwise it is removed.
 *
 * RETURNS
 *     Result from EM_SETWORDBREAKPROC message.
 */
LRESULT WINAPI SetPathWordBreakProc(HWND hwnd, BOOL bSet)
{
    return SendMessageW(hwnd, EM_SETWORDBREAKPROC, 0,
        (LPARAM)(bSet ? PathWordBreakProc : NULL));
}