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