mirror of
https://github.com/reactos/reactos.git
synced 2024-08-29 14:48:37 +00:00
289 lines
5.6 KiB
C
289 lines
5.6 KiB
C
/*
|
|
* ReactOS kernel
|
|
* Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
/*
|
|
* PROJECT: ReactOS user32.dll
|
|
* FILE: win32ss/user/user32/windows/rect.c
|
|
* PURPOSE: Input
|
|
* PROGRAMMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
|
|
* UPDATE HISTORY:
|
|
* 09-05-2001 CSH Created
|
|
*/
|
|
|
|
#include <user32.h>
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
CopyRect(LPRECT lprcDst,
|
|
CONST RECT *lprcSrc)
|
|
{
|
|
if (lprcDst == NULL || lprcSrc == NULL)
|
|
return FALSE;
|
|
|
|
*lprcDst = *lprcSrc;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
EqualRect(CONST RECT *lprc1,
|
|
CONST RECT *lprc2)
|
|
{
|
|
if (lprc1 == NULL || lprc2 == NULL)
|
|
return FALSE;
|
|
|
|
return (lprc1->left == lprc2->left) && (lprc1->top == lprc2->top) &&
|
|
(lprc1->right == lprc2->right) && (lprc1->bottom == lprc2->bottom);
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
InflateRect(LPRECT rect,
|
|
int dx,
|
|
int dy)
|
|
{
|
|
if (rect == NULL)
|
|
return FALSE;
|
|
|
|
rect->left -= dx;
|
|
rect->top -= dy;
|
|
rect->right += dx;
|
|
rect->bottom += dy;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
IntersectRect(LPRECT lprcDst,
|
|
CONST RECT *lprcSrc1,
|
|
CONST RECT *lprcSrc2)
|
|
{
|
|
if (lprcDst == NULL || lprcSrc1 == NULL || lprcSrc2 == NULL)
|
|
return FALSE;
|
|
|
|
if (IsRectEmpty(lprcSrc1) || IsRectEmpty(lprcSrc2) ||
|
|
lprcSrc1->left >= lprcSrc2->right ||
|
|
lprcSrc2->left >= lprcSrc1->right ||
|
|
lprcSrc1->top >= lprcSrc2->bottom ||
|
|
lprcSrc2->top >= lprcSrc1->bottom)
|
|
{
|
|
SetRectEmpty(lprcDst);
|
|
return FALSE;
|
|
}
|
|
|
|
lprcDst->left = max(lprcSrc1->left, lprcSrc2->left);
|
|
lprcDst->right = min(lprcSrc1->right, lprcSrc2->right);
|
|
lprcDst->top = max(lprcSrc1->top, lprcSrc2->top);
|
|
lprcDst->bottom = min(lprcSrc1->bottom, lprcSrc2->bottom);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
IsRectEmpty(CONST RECT *lprc)
|
|
{
|
|
if (lprc == NULL)
|
|
return TRUE;
|
|
|
|
return ((lprc->left >= lprc->right) || (lprc->top >= lprc->bottom));
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
OffsetRect(LPRECT rect,
|
|
int dx,
|
|
int dy)
|
|
{
|
|
if (rect == NULL)
|
|
return FALSE;
|
|
|
|
rect->left += dx;
|
|
rect->top += dy;
|
|
rect->right += dx;
|
|
rect->bottom += dy;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
PtInRect(CONST RECT *lprc,
|
|
POINT pt)
|
|
{
|
|
if (lprc == NULL)
|
|
return FALSE;
|
|
|
|
return((pt.x >= lprc->left) && (pt.x < lprc->right) &&
|
|
(pt.y >= lprc->top) && (pt.y < lprc->bottom));
|
|
}
|
|
|
|
BOOL
|
|
WINAPI
|
|
SetRect(LPRECT lprc,
|
|
int xLeft,
|
|
int yTop,
|
|
int xRight,
|
|
int yBottom)
|
|
{
|
|
if (lprc == NULL)
|
|
return FALSE;
|
|
|
|
lprc->left = xLeft;
|
|
lprc->top = yTop;
|
|
lprc->right = xRight;
|
|
lprc->bottom = yBottom;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
SetRectEmpty(LPRECT lprc)
|
|
{
|
|
if (lprc == NULL)
|
|
return FALSE;
|
|
|
|
lprc->left = lprc->right = lprc->top = lprc->bottom = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
SubtractRect(LPRECT lprcDst,
|
|
CONST RECT *lprcSrc1,
|
|
CONST RECT *lprcSrc2)
|
|
{
|
|
RECT tempRect;
|
|
|
|
if (lprcDst == NULL || lprcSrc1 == NULL || lprcSrc2 == NULL)
|
|
return FALSE;
|
|
|
|
if (!IntersectRect(&tempRect, lprcSrc1, lprcSrc2))
|
|
{
|
|
*lprcDst = *lprcSrc1;
|
|
return TRUE;
|
|
}
|
|
|
|
if (EqualRect(&tempRect, lprcSrc1))
|
|
{
|
|
SetRectEmpty(lprcDst);
|
|
return FALSE;
|
|
}
|
|
|
|
*lprcDst = *lprcSrc1;
|
|
|
|
if (lprcDst->top == tempRect.top && lprcDst->bottom == tempRect.bottom)
|
|
{
|
|
if (lprcDst->left == tempRect.left)
|
|
lprcDst->left = tempRect.right;
|
|
else if (lprcDst->right == tempRect.right)
|
|
lprcDst->right = tempRect.left;
|
|
}
|
|
else if (lprcDst->left == tempRect.left && lprcDst->right == tempRect.right)
|
|
{
|
|
if (lprcDst->top == tempRect.top)
|
|
lprcDst->top = tempRect.bottom;
|
|
else if (lprcDst->bottom == tempRect.bottom)
|
|
lprcDst->bottom = tempRect.top;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOL
|
|
WINAPI
|
|
UnionRect(LPRECT lprcDst,
|
|
CONST RECT *lprcSrc1,
|
|
CONST RECT *lprcSrc2)
|
|
{
|
|
if (lprcDst == NULL || lprcSrc1 == NULL || lprcSrc2 == NULL)
|
|
return FALSE;
|
|
|
|
if (IsRectEmpty(lprcSrc1))
|
|
{
|
|
if (IsRectEmpty(lprcSrc2))
|
|
{
|
|
SetRectEmpty(lprcDst);
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
*lprcDst = *lprcSrc2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (IsRectEmpty(lprcSrc2))
|
|
{
|
|
*lprcDst = *lprcSrc1;
|
|
}
|
|
else
|
|
{
|
|
lprcDst->left = min(lprcSrc1->left, lprcSrc2->left);
|
|
lprcDst->top = min(lprcSrc1->top, lprcSrc2->top);
|
|
lprcDst->right = max(lprcSrc1->right, lprcSrc2->right);
|
|
lprcDst->bottom = max(lprcSrc1->bottom, lprcSrc2->bottom);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|