gecko/gfx/public/nsMargin.h
2009-09-11 13:44:20 +12:00

154 lines
6.2 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NSMARGIN_H
#define NSMARGIN_H
#include "nsCoord.h"
#include "nsPoint.h"
#include "gfxCore.h"
struct nsMargin {
nscoord top, right, bottom, left;
// Constructors
nsMargin() {}
nsMargin(const nsMargin& aMargin) {*this = aMargin;}
nsMargin(nscoord aLeft, nscoord aTop,
nscoord aRight, nscoord aBottom) {left = aLeft; top = aTop;
right = aRight; bottom = aBottom;}
void SizeTo(nscoord aLeft, nscoord aTop,
nscoord aRight, nscoord aBottom) {left = aLeft; top = aTop;
right = aRight; bottom = aBottom;}
void SizeBy(nscoord aLeft, nscoord aTop,
nscoord aRight, nscoord aBottom) {left += aLeft; top += aTop;
right += aRight; bottom += aBottom;}
nscoord LeftRight() const { return left + right; }
nscoord TopBottom() const { return top + bottom; }
nsPoint TopLeft() const { return nsPoint(left, top); }
#if (NS_SIDE_TOP == 0) && (NS_SIDE_RIGHT == 1) && (NS_SIDE_BOTTOM == 2) && (NS_SIDE_LEFT == 3)
nscoord& side(PRUint8 aSide) {
NS_PRECONDITION(aSide <= NS_SIDE_LEFT, "Out of range side");
return *(&top + aSide);
}
nscoord side(PRUint8 aSide) const {
NS_PRECONDITION(aSide <= NS_SIDE_LEFT, "Out of range side");
return *(&top + aSide);
}
#else
#error "Somebody changed the side constants."
#endif
// Overloaded operators. Note that '=' isn't defined so we'll get the
// compiler generated default assignment operator
PRBool operator==(const nsMargin& aMargin) const {
return (PRBool) ((left == aMargin.left) && (top == aMargin.top) &&
(right == aMargin.right) && (bottom == aMargin.bottom));
}
PRBool operator!=(const nsMargin& aMargin) const {
return (PRBool) ((left != aMargin.left) || (top != aMargin.top) ||
(right != aMargin.right) || (bottom != aMargin.bottom));
}
nsMargin operator+(const nsMargin& aMargin) const {
return nsMargin(left + aMargin.left, top + aMargin.top,
right + aMargin.right, bottom + aMargin.bottom);
}
nsMargin operator-(const nsMargin& aMargin) const {
return nsMargin(left - aMargin.left, top - aMargin.top,
right - aMargin.right, bottom - aMargin.bottom);
}
nsMargin& operator+=(const nsMargin& aMargin) {left += aMargin.left;
top += aMargin.top;
right += aMargin.right;
bottom += aMargin.bottom;
return *this;}
nsMargin& operator-=(const nsMargin& aMargin) {left -= aMargin.left;
top -= aMargin.top;
right -= aMargin.right;
bottom -= aMargin.bottom;
return *this;}
PRBool IsZero() { return !left && !top && !right && !bottom; }
};
struct nsIntMargin {
PRInt32 top, right, bottom, left;
// Constructors
nsIntMargin() {}
nsIntMargin(const nsIntMargin& aMargin) {*this = aMargin;}
nsIntMargin(PRInt32 aLeft, PRInt32 aTop,
PRInt32 aRight, PRInt32 aBottom) {left = aLeft; top = aTop;
right = aRight; bottom = aBottom;}
void SizeTo(PRInt32 aLeft, PRInt32 aTop,
PRInt32 aRight, PRInt32 aBottom) {left = aLeft; top = aTop;
right = aRight; bottom = aBottom;}
PRInt32 LeftRight() const { return left + right; }
PRInt32 TopBottom() const { return top + bottom; }
nsPoint TopLeft() const { return nsPoint(left, top); }
PRInt32& side(PRUint8 aSide) {
NS_PRECONDITION(aSide <= NS_SIDE_LEFT, "Out of range side");
return *(&top + aSide);
}
PRInt32 side(PRUint8 aSide) const {
NS_PRECONDITION(aSide <= NS_SIDE_LEFT, "Out of range side");
return *(&top + aSide);
}
PRBool operator!=(const nsIntMargin& aMargin) const {
return (PRBool) ((left != aMargin.left) || (top != aMargin.top) ||
(right != aMargin.right) || (bottom != aMargin.bottom));
}
nsIntMargin operator+(const nsIntMargin& aMargin) const {
return nsIntMargin(left + aMargin.left, top + aMargin.top,
right + aMargin.right, bottom + aMargin.bottom);
}
PRBool IsZero() { return !left && !top && !right && !bottom; }
};
#endif /* NSMARGIN_H */