commandstack.cpp

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/*
 * Copyright (C) 2018 Ondrej Starek
 *
 * This file is part of OTest2.
 *
 * OTest2 is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OTest2 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with OTest2.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <commandstack.h>
 
#include <assert.h>
#include <vector>
 
#include <command.h>
#include <utils.h>
 
namespace OTest2 {
 
struct CommandStack::Impl {
  public:
    CommandStack* owner;
 
    typedef std::vector<CommandPtr> Stack;
    Stack stack;
 
    /* -- avoid copying */
    Impl(
        const Impl&) = delete;
    Impl& operator =(
        const Impl&) = delete;
 
    explicit Impl(
        CommandStack* owner_);
    ~Impl();
};
 
CommandStack::Impl::Impl(
    CommandStack* owner_) :
  owner(owner_) {
 
}
 
CommandStack::Impl::~Impl() {
 
}
 
CommandStack::CommandStack() :
  pimpl(new Impl(this)) {
 
}
 
CommandStack::~CommandStack() {
  odelete(pimpl);
}
 
void CommandStack::pushCommand(
    CommandPtr command_) {
  assert(command_ != nullptr);
  pimpl->stack.push_back(command_);
}
 
void CommandStack::replaceCommand(
    CommandPtr command_) {
  assert(command_ != nullptr);
  assert(!pimpl->stack.empty());
  pimpl->stack.back() = command_;
}
 
CommandPtr CommandStack::topCommand() const {
  assert(!pimpl->stack.empty());
  return pimpl->stack.back();
}
 
void CommandStack::popCommand() {
  assert(!pimpl->stack.empty());
  pimpl->stack.pop_back();
}
 
bool CommandStack::empty() const {
  return pimpl->stack.empty();
}
 
} /* namespace OTest2 */