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build files and documentation: MIT images / sources: GPL-2.0-only breeze icons: LGPL-2.0-only Microsoft MSM file, vc redist license
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/*
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* Deskflow -- mouse and keyboard sharing utility
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* SPDX-FileCopyrightText: (C) 2012 - 2021 Symless Ltd.
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* SPDX-FileCopyrightText: (C) 2008 Volker Lanz <vl@fidra.de>
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* SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
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*/
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#include "ScreenList.h"
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#include <array>
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namespace {
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/**
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* @brief getNeightborIndexes returns indexes for server neighbors
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* @param serverIndex server index
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* @param width of the grid
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* @param size of the grid
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* @return indexes for server neighbors
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*/
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std::array<int, 8> getNeighborsIndexes(int serverIndex, int width, int size)
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{
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const int UNSET = -1;
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const int LEFT = 0;
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const int RIGHT = 1;
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const int TOP = 2;
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const int BOTTOM = 3;
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const int TOP_LEFT = 4;
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const int TOP_RIGHT = 5;
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const int BOTTOM_RIGHT = 6;
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const int BOTTOM_LEFT = 7;
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std::array<int, 8> indexes = {UNSET};
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if (serverIndex >= 0 && serverIndex < size) {
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indexes[LEFT] = (serverIndex - 1) % width != width - 1 ? (serverIndex - 1) : UNSET;
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indexes[RIGHT] = (serverIndex + 1) % width != 0 ? (serverIndex + 1) : UNSET;
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indexes[TOP] = (serverIndex - width) >= 0 ? (serverIndex - width) : UNSET;
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indexes[BOTTOM] = (serverIndex + width) < size ? (serverIndex + width) : UNSET;
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indexes[TOP_LEFT] = (indexes[TOP] != UNSET && indexes[LEFT] != UNSET) ? indexes[TOP] - 1 : UNSET;
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indexes[TOP_RIGHT] = (indexes[TOP] != UNSET && indexes[RIGHT] != UNSET) ? indexes[TOP] + 1 : UNSET;
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indexes[BOTTOM_RIGHT] = (indexes[BOTTOM] != UNSET && indexes[RIGHT] != UNSET) ? indexes[BOTTOM] + 1 : UNSET;
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indexes[BOTTOM_LEFT] = (indexes[BOTTOM] != UNSET && indexes[LEFT] != UNSET) ? indexes[BOTTOM] - 1 : UNSET;
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}
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return indexes;
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}
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/**
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* @brief getServerIndex finds server and returns it's index
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* @param screens list to find server
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* @return server index
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*/
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int getServerIndex(const ScreenList &screens)
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{
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int serverIndex = -1;
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for (int i = 0; i < screens.size(); ++i) {
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if (screens[i].isServer()) {
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serverIndex = i;
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break;
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}
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}
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return serverIndex;
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}
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} // namespace
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ScreenList::ScreenList(int width) : QList<Screen>(), m_width(width)
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{
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}
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void ScreenList::addScreenByPriority(const Screen &newScreen)
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{
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int serverIndex = getServerIndex(*this);
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auto indexes = getNeighborsIndexes(serverIndex, m_width, static_cast<int>(size()));
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bool isAdded = false;
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for (const auto &index : indexes) {
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if (index >= 0 && index < size()) {
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auto &screen = operator[](index);
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if (screen.isNull()) {
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screen = newScreen;
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isAdded = true;
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break;
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}
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}
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}
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if (!isAdded) {
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addScreenToFirstEmpty(newScreen);
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}
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}
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void ScreenList::addScreenToFirstEmpty(const Screen &newScreen)
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{
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for (int i = 0; i < size(); ++i) {
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auto &screen = operator[](i);
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if (screen.isNull()) {
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screen = newScreen;
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break;
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}
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}
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}
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bool ScreenList::operator==(const ScreenList &sc) const
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{
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return m_width == sc.m_width && QList::operator==(sc);
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}
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