gfx/layers/ZoomConstraints.h

   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 #ifndef GFX_ZOOMCONSTRAINTS_H
   8 #define GFX_ZOOMCONSTRAINTS_H
   9
  10 #include "Units.h"  // for CSSRect, CSSPixel, etc
  11 #include "mozilla/Maybe.h"
  12 #include "mozilla/layers/ScrollableLayerGuid.h"  // for ScrollableLayerGuid
  13
  14 namespace mozilla {
  15 namespace layers {
  16
  17 struct ZoomConstraints {
  18   bool mAllowZoom;
  19   bool mAllowDoubleTapZoom;
  20   CSSToParentLayerScale mMinZoom;
  21   CSSToParentLayerScale mMaxZoom;
  22
  23   ZoomConstraints() : mAllowZoom(true), mAllowDoubleTapZoom(true) {
  24     MOZ_COUNT_CTOR(ZoomConstraints);
  25   }
  26
  27   ZoomConstraints(bool aAllowZoom, bool aAllowDoubleTapZoom,
  28                   const CSSToParentLayerScale& aMinZoom,
  29                   const CSSToParentLayerScale& aMaxZoom)
  30       : mAllowZoom(aAllowZoom),
  31         mAllowDoubleTapZoom(aAllowDoubleTapZoom),
  32         mMinZoom(aMinZoom),
  33         mMaxZoom(aMaxZoom) {
  34     MOZ_COUNT_CTOR(ZoomConstraints);
  35   }
  36
  37   ZoomConstraints(const ZoomConstraints& other)
  38       : mAllowZoom(other.mAllowZoom),
  39         mAllowDoubleTapZoom(other.mAllowDoubleTapZoom),
  40         mMinZoom(other.mMinZoom),
  41         mMaxZoom(other.mMaxZoom) {
  42     MOZ_COUNT_CTOR(ZoomConstraints);
  43   }
  44
  45   ~ZoomConstraints() { MOZ_COUNT_DTOR(ZoomConstraints); }
  46
  47   bool operator==(const ZoomConstraints& other) const {
  48     return mAllowZoom == other.mAllowZoom &&
  49            mAllowDoubleTapZoom == other.mAllowDoubleTapZoom &&
  50            mMinZoom == other.mMinZoom && mMaxZoom == other.mMaxZoom;
  51   }
  52
  53   bool operator!=(const ZoomConstraints& other) const {
  54     return !(*this == other);
  55   }
  56 };
  57
  58 typedef Maybe<ZoomConstraints> MaybeZoomConstraints;
  59
  60 }  // namespace layers
  61 }  // namespace mozilla
  62
  63 #endif /* GFX_ZOOMCONSTRAINTS_H */