121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "MessageQueue.hpp"
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#include <algorithm>
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MessageQueue::~MessageQueue()
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{
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clear();
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}
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void MessageQueue::put(const Payload& value)
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{
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std::unique_lock<std::mutex> lock(_mutex);
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put_impl(value);
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lock.unlock();
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_cv.notify_one();
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}
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MessageQueue::Payload MessageQueue::get()
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{
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std::unique_lock<std::mutex> lock(_mutex);
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_cv.wait(lock, [this] { return wait_impl(); });
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return get_impl();
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}
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void MessageQueue::clear()
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{
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std::unique_lock<std::mutex> lock(_mutex);
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clear_impl();
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}
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void MessageQueue::remove_if(std::function<bool(const Payload&)> pred)
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{
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std::unique_lock<std::mutex> lock(_mutex);
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std::remove_if(_queue.begin(), _queue.end(), pred);
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}
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void MessageQueue::put_impl(const Payload& value)
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{
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_queue.push_back(value);
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}
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bool MessageQueue::wait_impl() const
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{
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return _queue.size() > 0;
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}
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MessageQueue::Payload MessageQueue::get_impl()
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{
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auto result = _queue.front();
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_queue.pop_front();
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return result;
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}
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void MessageQueue::clear_impl()
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{
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_queue.clear();
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}
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void BasicTileQueue::put_impl(const Payload& value)
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{
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const auto msg = std::string(&value[0], value.size());
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if (msg == "canceltiles")
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{
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// remove all the existing tiles from the queue
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_queue.erase(std::remove_if(_queue.begin(), _queue.end(),
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[](const Payload& v)
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{
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// must not remove the tiles with 'id=', they are special, used
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// eg. for previews etc.
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const auto tmp = std::string(&v[0], v.size());
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return (tmp.compare(0, 5, "tile ") == 0) && (tmp.find("id=") == std::string::npos);
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}
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),
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_queue.end());
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// put the "canceltiles" in front of other messages
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_queue.push_front(value);
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}
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else
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{
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MessageQueue::put_impl(value);
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}
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}
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void TileQueue::put_impl(const Payload& value)
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{
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const auto msg = std::string(&value[0], value.size());
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if (msg.compare(0, 5, "tile ") == 0)
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{
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// TODO: implement a real re-ordering here, so that the tiles closest to
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// the cursor are returned first.
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// * we will want to put just a general "tile" message to the queue
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// * add a std::set that handles the tiles
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// * change the get_impl() to decide which tile is the correct one to
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// be returned
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// * we will also need to be informed about the position of the cursor
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// so that get_impl() returns optimal results
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//
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// For now: just don't put duplicates into the queue
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for (auto it = _queue.cbegin(); it != _queue.cend(); ++it)
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{
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if (value == *it)
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{
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return;
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}
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}
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}
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BasicTileQueue::put_impl(value);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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