content/base/src/nsViewportInfo.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsViewportInfo.h"
   6 #include "mozilla/Assertions.h"
   7 #include <algorithm>
   8
   9 using namespace mozilla;
  10
  11 void
  12 nsViewportInfo::SetDefaultZoom(const CSSToScreenScale& aDefaultZoom)
  13 {
  14   MOZ_ASSERT(aDefaultZoom.scale >= 0.0f);
  15   mDefaultZoom = aDefaultZoom;
  16 }
  17
  18 void
  19 nsViewportInfo::ConstrainViewportValues()
  20 {
  21   // Constrain the min/max zoom as specified at:
  22   // dev.w3.org/csswg/css-device-adapt section 6.2
  23   mMaxZoom = std::max(mMinZoom, mMaxZoom);
  24
  25   mDefaultZoom = mDefaultZoom < mMaxZoom ? mDefaultZoom : mMaxZoom;
  26   mDefaultZoom = mDefaultZoom > mMinZoom ? mDefaultZoom : mMinZoom;
  27 }