control.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

/* Control Panel management
 *
 * Copyright 2001 Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "wine/winbase16.h"
#include "wownt32.h"
#include "wine/debug.h"
#include "cpl.h"
#include "wine/unicode.h"

#define NO_SHLWAPI_REG
#include "shlwapi.h"

#include "cpanel.h"

WINE_DEFAULT_DEBUG_CHANNEL(shlctrl);

CPlApplet*	Control_UnloadApplet(CPlApplet* applet)
{
    unsigned	i;
    CPlApplet*	next;

    for (i = 0; i < applet->count; i++) {
        if (!applet->info[i].dwSize) continue;
        applet->proc(applet->hWnd, CPL_STOP, i, applet->info[i].lData);
    }
    if (applet->proc) applet->proc(applet->hWnd, CPL_EXIT, 0L, 0L);
    FreeLibrary(applet->hModule);
    next = applet->next;
    HeapFree(GetProcessHeap(), 0, applet);
    return next;
}

CPlApplet*	Control_LoadApplet(HWND hWnd, LPCWSTR cmd, CPanel* panel)
{
    CPlApplet*	applet;
    unsigned 	i;
    CPLINFO	info;
    NEWCPLINFOW newinfo;

    if (!(applet = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*applet))))
       return applet;

    applet->hWnd = hWnd;

    if (!(applet->hModule = LoadLibraryW(cmd))) {
        WARN("Cannot load control panel applet %s\n", debugstr_w(cmd));
	goto theError;
    }
    if (!(applet->proc = (APPLET_PROC)GetProcAddress(applet->hModule, "CPlApplet"))) {
        WARN("Not a valid control panel applet %s\n", debugstr_w(cmd));
	goto theError;
    }
    if (!applet->proc(hWnd, CPL_INIT, 0L, 0L)) {
        WARN("Init of applet has failed\n");
	goto theError;
    }
    if ((applet->count = applet->proc(hWnd, CPL_GETCOUNT, 0L, 0L)) == 0) {
        WARN("No subprogram in applet\n");
	goto theError;
    }

    applet = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, applet,
			 sizeof(*applet) + (applet->count - 1) * sizeof(NEWCPLINFOW));

    for (i = 0; i < applet->count; i++) {
       ZeroMemory(&newinfo, sizeof(newinfo));
       newinfo.dwSize = sizeof(NEWCPLINFOA);
       applet->info[i].dwSize = sizeof(NEWCPLINFOW);
       /* proc is supposed to return a null value upon success for
	* CPL_INQUIRE and CPL_NEWINQUIRE
	* However, real drivers don't seem to behave like this
	* So, use introspection rather than return value
	*/
       applet->proc(hWnd, CPL_NEWINQUIRE, i, (LPARAM)&newinfo);
       if (newinfo.hIcon == 0) {
	   applet->proc(hWnd, CPL_INQUIRE, i, (LPARAM)&info);
	   if (info.idIcon == 0 || info.idName == 0) {
	       WARN("Couldn't get info from sp %u\n", i);
	       applet->info[i].dwSize = 0;
	   } else {
	       /* convert the old data into the new structure */
	       applet->info[i].dwFlags = 0;
	       applet->info[i].dwHelpContext = 0;
	       applet->info[i].lData = info.lData;
	       applet->info[i].hIcon = LoadIconW(applet->hModule,
						 MAKEINTRESOURCEW(info.idIcon));
	       LoadStringW(applet->hModule, info.idName,
			   applet->info[i].szName, sizeof(applet->info[i].szName) / sizeof(WCHAR));
	       LoadStringW(applet->hModule, info.idInfo,
			   applet->info[i].szInfo, sizeof(applet->info[i].szInfo) / sizeof(WCHAR));
	       applet->info[i].szHelpFile[0] = '\0';
	   }
       }
       else
       {
           CopyMemory(&applet->info[i], &newinfo, newinfo.dwSize);
	   if (newinfo.dwSize != sizeof(NEWCPLINFOW))
           {
	       applet->info[i].dwSize = sizeof(NEWCPLINFOW);
               MultiByteToWideChar(CP_ACP, 0, ((LPNEWCPLINFOA)&newinfo)->szName,
	                           sizeof(((LPNEWCPLINFOA)&newinfo)->szName) / sizeof(CHAR),
			           applet->info[i].szName,
			           sizeof(applet->info[i].szName) / sizeof(WCHAR));
               MultiByteToWideChar(CP_ACP, 0, ((LPNEWCPLINFOA)&newinfo)->szInfo,
	                           sizeof(((LPNEWCPLINFOA)&newinfo)->szInfo) / sizeof(CHAR),
			           applet->info[i].szInfo,
			           sizeof(applet->info[i].szInfo) / sizeof(WCHAR));
               MultiByteToWideChar(CP_ACP, 0, ((LPNEWCPLINFOA)&newinfo)->szHelpFile,
	                           sizeof(((LPNEWCPLINFOA)&newinfo)->szHelpFile) / sizeof(CHAR),
			           applet->info[i].szHelpFile,
			           sizeof(applet->info[i].szHelpFile) / sizeof(WCHAR));
           }
       }
    }

    applet->next = panel->first;
    panel->first = applet;

    return applet;

 theError:
    Control_UnloadApplet(applet);
    return NULL;
}

static void 	 Control_WndProc_Create(HWND hWnd, const CREATESTRUCTA* cs)
{
   CPanel*	panel = (CPanel*)cs->lpCreateParams;

   SetWindowLongPtrA(hWnd, 0, (LONG_PTR)panel);
   panel->status = 0;
   panel->hWnd = hWnd;
}

#define	XICON	32
#define XSTEP	128
#define	YICON	32
#define YSTEP	64

static BOOL	Control_Localize(const CPanel* panel, int cx, int cy,
				 CPlApplet** papplet, unsigned* psp)
{
    unsigned	i, x = (XSTEP-XICON)/2, y = 0;
    CPlApplet*	applet;
    RECT	rc;

    GetClientRect(panel->hWnd, &rc);
    for (applet = panel->first; applet; applet = applet->next) {
        for (i = 0; i < applet->count; i++) {
	    if (!applet->info[i].dwSize) continue;
	    if (x + XSTEP >= rc.right - rc.left) {
	        x = (XSTEP-XICON)/2;
		y += YSTEP;
	    }
	    if (cx >= x && cx < x + XICON && cy >= y && cy < y + YSTEP) {
	        *papplet = applet;
	        *psp = i;
		return TRUE;
	    }
	    x += XSTEP;
	}
    }
    return FALSE;
}

static LRESULT Control_WndProc_Paint(const CPanel* panel, WPARAM wParam)
{
    HDC		hdc;
    PAINTSTRUCT	ps;
    RECT	rc, txtRect;
    unsigned	i, x = 0, y = 0;
    CPlApplet*	applet;
    HGDIOBJ	hOldFont;

    hdc = (wParam) ? (HDC)wParam : BeginPaint(panel->hWnd, &ps);
    hOldFont = SelectObject(hdc, GetStockObject(ANSI_VAR_FONT));
    GetClientRect(panel->hWnd, &rc);
    for (applet = panel->first; applet; applet = applet->next) {
        for (i = 0; i < applet->count; i++) {
	    if (x + XSTEP >= rc.right - rc.left) {
	        x = 0;
		y += YSTEP;
	    }
	    if (!applet->info[i].dwSize) continue;
	    DrawIcon(hdc, x + (XSTEP-XICON)/2, y, applet->info[i].hIcon);
	    txtRect.left = x;
	    txtRect.right = x + XSTEP;
	    txtRect.top = y + YICON;
	    txtRect.bottom = y + YSTEP;
	    DrawTextW(hdc, applet->info[i].szName, -1, &txtRect,
		      DT_CENTER | DT_VCENTER);
	    x += XSTEP;
	}
    }
    SelectObject(hdc, hOldFont);
    if (!wParam) EndPaint(panel->hWnd, &ps);
    return 0;
}

static LRESULT Control_WndProc_LButton(CPanel* panel, LPARAM lParam, BOOL up)
{
    unsigned	i;
    CPlApplet*	applet;

    if (Control_Localize(panel, (short)LOWORD(lParam), (short)HIWORD(lParam), &applet, &i)) {
       if (up) {
	   if (panel->clkApplet == applet && panel->clkSP == i) {
	       applet->proc(applet->hWnd, CPL_DBLCLK, i, applet->info[i].lData);
	   }
       } else {
	   panel->clkApplet = applet;
	   panel->clkSP = i;
       }
    }
    return 0;
}

static LRESULT WINAPI	Control_WndProc(HWND hWnd, UINT wMsg,
					WPARAM lParam1, LPARAM lParam2)
{
   CPanel*	panel = (CPanel*)GetWindowLongPtrA(hWnd, 0);

   if (panel || wMsg == WM_CREATE) {
      switch (wMsg) {
      case WM_CREATE:
	 Control_WndProc_Create(hWnd, (CREATESTRUCTA*)lParam2);
	 return 0;
      case WM_DESTROY:
         {
	    CPlApplet*	applet = panel->first;
	    while (applet)