3 * Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * PROJECT: ReactOS user32.dll
22 * FILE: lib/user32/windows/input.c
24 * PROGRAMMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
26 * 09-05-2001 CSH Created
29 /* INCLUDES ******************************************************************/
33 /* FUNCTIONS *****************************************************************/
39 CopyRect(LPRECT lprcDst
, CONST RECT
*lprcSrc
)
41 if(lprcDst
== NULL
|| lprcSrc
== NULL
)
57 if (lprc1
== NULL
|| lprc2
== NULL
)
60 return (lprc1
->left
== lprc2
->left
) && (lprc1
->top
== lprc2
->top
) &&
61 (lprc1
->right
== lprc2
->right
) && (lprc1
->bottom
== lprc2
->bottom
);
69 InflateRect(LPRECT rect
, int dx
, int dy
)
83 IntersectRect(LPRECT lprcDst
,
87 if (IsRectEmpty(lprcSrc1
) || IsRectEmpty(lprcSrc2
) ||
88 lprcSrc1
->left
>= lprcSrc2
->right
||
89 lprcSrc2
->left
>= lprcSrc1
->right
||
90 lprcSrc1
->top
>= lprcSrc2
->bottom
||
91 lprcSrc2
->top
>= lprcSrc1
->bottom
)
93 SetRectEmpty(lprcDst
);
96 lprcDst
->left
= max(lprcSrc1
->left
, lprcSrc2
->left
);
97 lprcDst
->right
= min(lprcSrc1
->right
, lprcSrc2
->right
);
98 lprcDst
->top
= max(lprcSrc1
->top
, lprcSrc2
->top
);
99 lprcDst
->bottom
= min(lprcSrc1
->bottom
, lprcSrc2
->bottom
);
108 IsRectEmpty(CONST RECT
*lprc
)
110 return((lprc
->left
>= lprc
->right
) || (lprc
->top
>= lprc
->bottom
));
118 OffsetRect(LPRECT rect
, int dx
, int dy
)
135 PtInRect(CONST RECT
*lprc
, POINT pt
)
137 return((pt
.x
>= lprc
->left
) && (pt
.x
< lprc
->right
) &&
138 (pt
.y
>= lprc
->top
) && (pt
.y
< lprc
->bottom
));
142 SetRect(LPRECT lprc
, int xLeft
, int yTop
, int xRight
, int yBottom
)
146 lprc
->right
= xRight
;
147 lprc
->bottom
= yBottom
;
156 SetRectEmpty(LPRECT lprc
)
158 lprc
->left
= lprc
->right
= lprc
->top
= lprc
->bottom
= 0;
167 SubtractRect(LPRECT lprcDst
, CONST RECT
*lprcSrc1
, CONST RECT
*lprcSrc2
)
171 if(lprcDst
== NULL
|| lprcSrc1
== NULL
|| lprcSrc2
== NULL
)
174 CopyRect(lprcDst
, lprcSrc1
);
176 if(!IntersectRect(&tempRect
, lprcSrc1
, lprcSrc2
))
179 if (EqualRect(&tempRect
, lprcDst
))
181 SetRectEmpty(lprcDst
);
184 if(lprcDst
->top
== tempRect
.top
&& lprcDst
->bottom
== tempRect
.bottom
)
186 if(lprcDst
->left
== tempRect
.left
)
187 lprcDst
->left
= tempRect
.right
;
188 else if(lprcDst
->right
== tempRect
.right
)
189 lprcDst
->right
= tempRect
.left
;
191 else if(lprcDst
->left
== tempRect
.left
&& lprcDst
->right
== tempRect
.right
)
193 if(lprcDst
->top
== tempRect
.top
)
194 lprcDst
->top
= tempRect
.bottom
;
195 else if(lprcDst
->right
== tempRect
.right
)
196 lprcDst
->right
= tempRect
.left
;
207 UnionRect(LPRECT lprcDst
, CONST RECT
*lprcSrc1
, CONST RECT
*lprcSrc2
)
209 if (IsRectEmpty(lprcSrc1
))
211 if (IsRectEmpty(lprcSrc2
))
213 SetRectEmpty(lprcDst
);
218 *lprcDst
= *lprcSrc2
;
223 if (IsRectEmpty(lprcSrc2
))
225 *lprcDst
= *lprcSrc1
;
229 lprcDst
->left
= min(lprcSrc1
->left
, lprcSrc2
->left
);
230 lprcDst
->top
= min(lprcSrc1
->top
, lprcSrc2
->top
);
231 lprcDst
->right
= max(lprcSrc1
->right
, lprcSrc2
->right
);
232 lprcDst
->bottom
= max(lprcSrc1
->bottom
, lprcSrc2
->bottom
);