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 <iosfwd>
  11
  12 #include "Units.h"  // for CSSRect, CSSPixel, etc
  13 #include "mozilla/Maybe.h"
  14 #include "mozilla/layers/ScrollableLayerGuid.h"  // for ScrollableLayerGuid
  15
  16 namespace mozilla {
  17 namespace layers {
  18
  19 struct ZoomConstraints {
  20   bool mAllowZoom;
  21   bool mAllowDoubleTapZoom;
  22   CSSToParentLayerScale mMinZoom;
  23   CSSToParentLayerScale mMaxZoom;
  24
  25   ZoomConstraints() : mAllowZoom(true), mAllowDoubleTapZoom(true) {
  26     MOZ_COUNT_CTOR(ZoomConstraints);
  27   }
  28
  29   ZoomConstraints(bool aAllowZoom, bool aAllowDoubleTapZoom,
  30                   const CSSToParentLayerScale& aMinZoom,
  31                   const CSSToParentLayerScale& aMaxZoom)
  32       : mAllowZoom(aAllowZoom),
  33         mAllowDoubleTapZoom(aAllowDoubleTapZoom),
  34         mMinZoom(aMinZoom),
  35         mMaxZoom(aMaxZoom) {
  36     MOZ_COUNT_CTOR(ZoomConstraints);
  37   }
  38
  39   ZoomConstraints(const ZoomConstraints& other)
  40       : mAllowZoom(other.mAllowZoom),
  41         mAllowDoubleTapZoom(other.mAllowDoubleTapZoom),
  42         mMinZoom(other.mMinZoom),
  43         mMaxZoom(other.mMaxZoom) {
  44     MOZ_COUNT_CTOR(ZoomConstraints);
  45   }
  46
  47   MOZ_COUNTED_DTOR(ZoomConstraints)
  48
  49   bool operator==(const ZoomConstraints& other) const {
  50     return mAllowZoom == other.mAllowZoom &&
  51            mAllowDoubleTapZoom == other.mAllowDoubleTapZoom &&
  52            mMinZoom == other.mMinZoom && mMaxZoom == other.mMaxZoom;
  53   }
  54
  55   bool operator!=(const ZoomConstraints& other) const {
  56     return !(*this == other);
  57   }
  58
  59   friend std::ostream& operator<<(std::ostream& aStream,
  60                                   const ZoomConstraints& z);
  61 };
  62
  63 }  // namespace layers
  64 }  // namespace mozilla
  65
  66 #endif /* GFX_ZOOMCONSTRAINTS_H */