gfx/layers/ScrollableLayerGuid.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 "ScrollableLayerGuid.h"
   8
   9 #include <ostream>
  10 #include "mozilla/HashFunctions.h"  // for HashGeneric
  11 #include "nsPrintfCString.h"        // for nsPrintfCString
  12
  13 namespace mozilla {
  14 namespace layers {
  15
  16 ScrollableLayerGuid::ScrollableLayerGuid()
  17     : mLayersId{0}, mPresShellId(0), mScrollId(0) {}
  18
  19 ScrollableLayerGuid::ScrollableLayerGuid(LayersId aLayersId,
  20                                          uint32_t aPresShellId,
  21                                          ViewID aScrollId)
  22     : mLayersId(aLayersId), mPresShellId(aPresShellId), mScrollId(aScrollId) {}
  23
  24 bool ScrollableLayerGuid::operator==(const ScrollableLayerGuid& other) const {
  25   return mLayersId == other.mLayersId && mPresShellId == other.mPresShellId &&
  26          mScrollId == other.mScrollId;
  27 }
  28
  29 bool ScrollableLayerGuid::operator!=(const ScrollableLayerGuid& other) const {
  30   return !(*this == other);
  31 }
  32
  33 bool ScrollableLayerGuid::operator<(const ScrollableLayerGuid& other) const {
  34   if (mLayersId < other.mLayersId) {
  35     return true;
  36   }
  37   if (mLayersId == other.mLayersId) {
  38     if (mPresShellId < other.mPresShellId) {
  39       return true;
  40     }
  41     if (mPresShellId == other.mPresShellId) {
  42       return mScrollId < other.mScrollId;
  43     }
  44   }
  45   return false;
  46 }
  47
  48 std::ostream& operator<<(std::ostream& aOut, const ScrollableLayerGuid& aGuid) {
  49   return aOut << nsPrintfCString("{ l=0x%" PRIx64 ", p=%u, v=%" PRIu64 " }",
  50                                  uint64_t(aGuid.mLayersId), aGuid.mPresShellId,
  51                                  aGuid.mScrollId)
  52                      .get();
  53 }
  54
  55 bool ScrollableLayerGuid::EqualsIgnoringPresShell(
  56     const ScrollableLayerGuid& aA, const ScrollableLayerGuid& aB) {
  57   return aA.mLayersId == aB.mLayersId && aA.mScrollId == aB.mScrollId;
  58 }
  59
  60 std::size_t ScrollableLayerGuid::HashFn::operator()(
  61     const ScrollableLayerGuid& aGuid) const {
  62   return HashGeneric(uint64_t(aGuid.mLayersId), aGuid.mPresShellId,
  63                      aGuid.mScrollId);
  64 }
  65
  66 std::size_t ScrollableLayerGuid::HashIgnoringPresShellFn::operator()(
  67     const ScrollableLayerGuid& aGuid) const {
  68   return HashGeneric(uint64_t(aGuid.mLayersId), aGuid.mScrollId);
  69 }
  70
  71 bool ScrollableLayerGuid::EqualIgnoringPresShellFn::operator()(
  72     const ScrollableLayerGuid& lhs, const ScrollableLayerGuid& rhs) const {
  73   return EqualsIgnoringPresShell(lhs, rhs);
  74 }
  75
  76 }  // namespace layers
  77 }  // namespace mozilla