gfx/src/nsRect.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsRect.h"
   8 #include "mozilla/gfx/Types.h"   // for eSideBottom, etc
   9 #include "mozilla/CheckedInt.h"  // for CheckedInt
  10 #include "nsDeviceContext.h"     // for nsDeviceContext
  11 #include "nsString.h"            // for nsAutoString, etc
  12 #include "nsMargin.h"            // for nsMargin
  13
  14 static_assert(
  15     (int(mozilla::eSideTop) == 0) && (int(mozilla::eSideRight) == 1) &&
  16         (int(mozilla::eSideBottom) == 2) && (int(mozilla::eSideLeft) == 3),
  17     "The mozilla::Side sequence must match the nsMargin nscoord sequence");
  18
  19 const mozilla::gfx::IntRect& GetMaxSizedIntRect() {
  20   static const mozilla::gfx::IntRect r(0, 0, INT32_MAX, INT32_MAX);
  21   return r;
  22 }
  23
  24 bool nsRect::Overflows() const {
  25   mozilla::CheckedInt<int32_t> xMost = this->x;
  26   xMost += this->width;
  27   mozilla::CheckedInt<int32_t> yMost = this->y;
  28   yMost += this->height;
  29   return !xMost.isValid() || !yMost.isValid();
  30 }