Issue 119 - Switch to injecting CSS for element hiding

src/shared/EventWithSetter.cpp

+/*
+* This file is part of Adblock Plus <https://adblockplus.org/>,
+* Copyright (C) 2006-2016 Eyeo GmbH
+*
+* Adblock Plus is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License version 3 as
+* published by the Free Software Foundation.
+*
+* Adblock Plus is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <cassert>
+#include "EventWithSetter.h"
+
+Event::Event()
+  : m_handle(CreateEvent(/*eventAttributes*/nullptr, /*manualReset*/TRUE,
+/*initState*/FALSE, /*name*/nullptr))
+{
+  assert(!!*this && "Handle should be successfully created");
+}
+
+Event::~Event()
+{
+  if (!!*this) {
+    CloseHandle(m_handle);
+  }
+}
+
+void Event::Set()
+{
+  SetEvent(m_handle);
+}
+
+void Event::Reset()
+{
+  ResetEvent(m_handle);
+}
+
+bool Event::Wait(int32_t timeoutMsec /*= InfiniteTimeout*/)
+{
+  return WaitForSingleObject(m_handle, timeoutMsec) == WAIT_OBJECT_0;
+}
+
+EventWithSetter::Setter::Setter(const DataPtr& data)
+  : m_data(data)
+{
+}
+
+EventWithSetter::Setter::~Setter()
+{
+  if (!m_data->isSetCalled)
+    m_data->event.Set();
+}
+
+void EventWithSetter::Setter::Set()
+{
+  m_data->isSetCalled = true;
+  m_data->event.Set();
+}
+
+EventWithSetter::EventWithSetter()
+  : m_data(std::make_shared<Data>())
+{
+}
+
+std::shared_ptr<EventWithSetter::Setter> EventWithSetter::CreateSetter()
+{
+  std::shared_ptr<Setter> retValue = m_data->eventSetter.lock();
+  assert(!m_data->isSetterCreated && !retValue && "Setter is already created however it's supposed to be created only once");
+  if (!retValue)
+  {
+    retValue = std::make_shared<Setter>(m_data);
+  }
+  m_data->isSetterCreated = true;
+  return retValue;
+}
+
+bool EventWithSetter::Wait(int32_t timeoutMsec /*= Event::InfiniteTimeout*/)
+{
+  assert(m_data->isSetterCreated && "Wrong class usage. The setter should be created before calling Wait.");
+  return m_data->isSetterCreated && m_data->event.Wait(timeoutMsec) && m_data->isSetCalled;
+}