зеркало из https://github.com/mozilla/pjs.git
104 строки
3.5 KiB
C++
104 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Corporation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Robert O'Callahan <robert@ocallahan.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef MOZILLA_GFX_BASESIZE_H_
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#define MOZILLA_GFX_BASESIZE_H_
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namespace mozilla {
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namespace gfx {
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/**
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* Do not use this class directly. Subclass it, pass that subclass as the
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* Sub parameter, and only use that subclass. This allows methods to safely
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* cast 'this' to 'Sub*'.
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*/
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template <class T, class Sub>
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struct BaseSize {
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T width, height;
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// Constructors
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BaseSize() : width(0), height(0) {}
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BaseSize(T aWidth, T aHeight) : width(aWidth), height(aHeight) {}
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void SizeTo(T aWidth, T aHeight) { width = aWidth; height = aHeight; }
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// Note that '=' isn't defined so we'll get the
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// compiler generated default assignment operator
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bool operator==(const Sub& aSize) const {
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return width == aSize.width && height == aSize.height;
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}
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bool operator!=(const Sub& aSize) const {
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return width != aSize.width || height != aSize.height;
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}
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bool operator<=(const Sub& aSize) const {
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return width <= aSize.width && height <= aSize.height;
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}
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bool operator<(const Sub& aSize) const {
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return *this <= aSize && *this != aSize;
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}
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Sub operator+(const Sub& aSize) const {
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return Sub(width + aSize.width, height + aSize.height);
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}
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Sub operator-(const Sub& aSize) const {
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return Sub(width - aSize.width, height - aSize.height);
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}
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Sub& operator+=(const Sub& aSize) {
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width += aSize.width;
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height += aSize.height;
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return *static_cast<Sub*>(this);
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}
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Sub& operator-=(const Sub& aSize) {
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width -= aSize.width;
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height -= aSize.height;
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return *static_cast<Sub*>(this);
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}
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Sub operator*(T aScale) const {
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return Sub(width * aScale, height * aScale);
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}
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Sub operator/(T aScale) const {
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return Sub(width / aScale, height / aScale);
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}
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};
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}
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}
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#endif /* MOZILLA_GFX_BASESIZE_H_ */
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