EntryProvider: saveUserEntry(): Add missing fields

Introduce EntryType, allowing to distnguish between:

- inherietd entries: Those inherit their values from
other entries, typcally system entries. They do not
allow overwriting the value, except row/col.
- system entries: those not created by the user in any way,
usually .desktop files in /usr/share/applications/...
- user entries: those that have been created by the user.
they can however also inherit, and overwrite inherited values.

inherited are used for the "favourites" feature.

entryprovider.cpp

@@ -56,7 +56,7 @@ EntryConfig EntryProvider::readFromDesktopFile(const QString &path)
 		}
 		if(key == "icon")
 		{
-			result.icon = QIcon::fromTheme(args);
+			result.iconPath = args;
 		}
 		if(key == "exec")
 		{
@@ -80,6 +80,7 @@ EntryConfig EntryProvider::readFromDesktopFile(const QString &path)
 			result.hidden = args == "true";
 		}
 	}
+	result.type = EntryType::SYSTEM;
 	return result;
 }
 
@@ -112,19 +113,71 @@ EntryConfig EntryProvider::readqsrunFile(const QString &path)
 		// TODO: better exception class
 		throw new std::runtime_error("Failed to open file");
 	}
+	QHash<QString, QString> map;
 	QTextStream stream(&file);
 	while(!stream.atEnd())
 	{
 		QString line = stream.readLine();
-		QStringList splitted = line.split(" ");
-		if(splitted.length() < 2)
+
+		int spacePos = line.indexOf(' ');
+		if(spacePos == -1)
 		{
 			throw new ConfigFormatException("misformated line in .qsrun config file " + path.toStdString());
 		}
-		QString key = splitted[0];
-		if(key == "arguments")
+
+		QString key = line.mid(0, spacePos);
+		QString value = line.mid(spacePos + 1);
+
+		if(key == "" || value == "")
 		{
-			auto args = splitted.mid(1);
+			throw new ConfigFormatException("empty key or value in .qsrun config file " + path.toStdString());
+		}
+		map[key] = value;
+	}
+
+	if(map.contains("inherit"))
+	{
+		auto entry = readEntryFromPath(map["inherit"]);
+		if(entry)
+		{
+			result = entry.value();
+			result.inherit = map["inherit"];
+		}
+		else
+		{
+			throw new ConfigFormatException("Error attempting to read inherited entry");
+		}
+	}
+	QString type = map["type"];
+	if(!type.isEmpty())
+	{
+		if(type == "system")
+		{
+			throw new ConfigFormatException(".qsrun files cannot be designated as system entries " +
+											path.toStdString());
+		}
+		else if(type == "inherit")
+		{
+			result.type = EntryType::INHERIT;
+		}
+		else if(type == "user")
+		{
+			result.type = EntryType::USER;
+		}
+		else
+		{
+			throw new ConfigFormatException("Invalid value for type provided in file: " + path.toStdString());
+		}
+	}
+	else
+	{
+		result.type = EntryType::USER;
+	}
+	if(result.type != EntryType::INHERIT)
+	{
+		if(map.contains("arguments"))
+		{
+			auto args = map["arguments"].split(' ');
 			QString merged;
 			for(QString &str : args)
 			{
@@ -153,42 +206,20 @@ EntryConfig EntryProvider::readqsrunFile(const QString &path)
 				throw ConfigFormatException("non-closed \" in config file " + path.toStdString());
 			}
 		}
-		if(key == "name")
-		{
-			result.name = splitted.mid(1).join(' ');
-		}
-		if(key == "icon")
-		{
-			result.icon = QIcon(splitted[1]);
-		}
-		if(key == "row")
-		{
-			result.row = splitted[1].toInt();
-		}
-		if(key == "col")
-		{
-			result.col = splitted[1].toInt();
-		}
-		if(key == "command")
-		{
-			result.command = splitted[1];
-		}
-		if(key == "key")
-		{
-			// QKeySequence sequence(splitted[1]);
-			// result.keySequence = sequence;
-			result.key = splitted[1].toLower();
-		}
-		if(key == "inherit")
-		{
-			auto entry = readEntryFromPath(resolveEntryPath(splitted[1]));
-			if(entry)
+		auto assignIfSourceNotEmpty = [](QString source, QString &val) {
+			if(!source.isEmpty())
 			{
-				inheritedConfig = *entry;
+				val = source;
 			}
-		}
+		};
+		assignIfSourceNotEmpty(map["key"].toLower(), result.key);
+		assignIfSourceNotEmpty(map["command"], result.command);
+		assignIfSourceNotEmpty(map["icon"], result.iconPath);
+		assignIfSourceNotEmpty(map["name"], result.name);
 	}
-	return result.update(inheritedConfig);
+	result.col = map["col"].toInt();
+	result.row = map["row"].toInt();
+	return result;
 }
 
 QString EntryProvider::resolveEntryPath(QString path)
@@ -228,6 +259,7 @@ QVector<EntryConfig> EntryProvider::readConfig(QStringList paths)
 			{
 				if(!entry->hidden)
 				{
+					entry->entryPath = path;
 					result.append(*entry);
 				}
 			}
@@ -246,6 +278,70 @@ QVector<EntryConfig> EntryProvider::getSystemEntries()
 	return readConfig(this->systemEntriesDirsPaths);
 }
 
+void EntryProvider::saveUserEntry(const EntryConfig &config)
+{
+	if(config.type == EntryType::SYSTEM || config.entryPath.isEmpty())
+	{
+		throw std::runtime_error("Only user/inherited entries can be saved");
+	}
+	QString transitPath = config.entryPath + ".transit";
+	QFile file{transitPath};
+	if(!file.open(QIODevice::WriteOnly))
+	{
+		throw std::runtime_error("Error: Can not open file for writing");
+	}
+	QTextStream outStream(&file);
+	outStream << "type" << " " << ((config.type == EntryType::USER) ? "user" : "inherit") << endl;
+	if(!config.inherit.isEmpty())
+	{
+		outStream << "inherit" << " " << config.inherit << endl;
+	}
+	outStream << "row" << " " << config.row << endl;
+	outStream << "col" << " " << config.col << endl;
+	outStream << "hidden" << " " << config.hidden << endl;
+	outStream << "key" << " " << config.key << endl;
+	if(config.type == EntryType::USER)
+	{
+		if(!config.name.isEmpty())
+		{
+			outStream << "name" << " " << config.name << endl;
+		}
+		if(!config.command.isEmpty())
+		{
+			outStream << "command" << " " << config.command << endl;
+		}
+		if(!config.iconPath.isEmpty())
+		{
+			outStream << "icon" << " " << config.iconPath << endl;
+		}
+		if(!config.arguments.empty())
+		{
+			outStream << "arguments" << " " << config.arguments.join(' ') << endl;
+		}
+	}
+
+	outStream.flush();
+	file.close();
+
+	// Qts don't work if file already exists and c++17... don't want to pull in the fs lib yet
+	int ret = rename(transitPath.toStdString().c_str(), config.entryPath.toStdString().c_str());
+	if(ret != 0)
+	{
+		qDebug() << strerror(errno);
+		throw std::runtime_error("Failed to save entry file: Error during rename");
+	}
+}
+
+bool EntryProvider::deleteUserEntry(const EntryConfig &config)
+{
+	if(config.type == EntryType::SYSTEM || config.entryPath.isEmpty())
+	{
+		throw std::runtime_error("Only user/inherited entries can be deleted");
+	}
+	QFile file{config.entryPath};
+	return file.remove();
+}
+
 template <class T> void assignIfDestDefault(T &dest, const T &source)
 {
 	if(dest == T())
@@ -259,12 +355,16 @@ EntryConfig &EntryConfig::update(const EntryConfig &o)
 	assignIfDestDefault(this->arguments, o.arguments);
 	assignIfDestDefault(this->col, o.col);
 	assignIfDestDefault(this->command, o.command);
-	if(this->icon.isNull())
+	if(this->iconPath.isEmpty())
 	{
-		this->icon = o.icon;
+		this->iconPath = o.iconPath;
 	}
 	assignIfDestDefault(this->key, o.key);
 	assignIfDestDefault(this->name, o.name);
 	assignIfDestDefault(this->row, o.row);
+	assignIfDestDefault(this->hidden, o.hidden);
+	assignIfDestDefault(this->inherit, o.inherit);
+	assignIfDestDefault(this->entryPath, o.entryPath);
+	assignIfDestDefault(this->type, o.type);
 	return *this;
 }

entryprovider.h

@@ -15,15 +15,25 @@ class ConfigFormatException : public std::runtime_error
 	}
 };
 
+enum EntryType
+{
+	USER,
+	INHERIT,
+	SYSTEM
+};
+
 class EntryConfig
 {
   public:
+	EntryType type = SYSTEM;
 	bool hidden = false;
+	QString entryPath;
 	QString key;
 	QString name;
 	QString command;
+	QString iconPath;
 	QStringList arguments;
-	QIcon icon;
+	QString inherit;
 	int row = 0;
 	int col = 0;
 
@@ -46,6 +56,8 @@ class EntryProvider
 	EntryProvider(QStringList userEntriesDirsPaths, QStringList systemEntriesDirsPaths);
 	QVector<EntryConfig> getUserEntries();
 	QVector<EntryConfig> getSystemEntries();
+	void saveUserEntry(const EntryConfig &config);
+	bool deleteUserEntry(const EntryConfig &config);
 };
 
 #endif // ENTRYPROVIDER_H

entrypushbutton.cpp

@@ -13,16 +13,21 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+
+#include <QDrag>
+#include <QMimeData>
+#include <QApplication>
 #include "entrypushbutton.h"
 
 EntryPushButton::EntryPushButton(const EntryConfig &config) : QPushButton()
 {
 	this->setText(config.name);
 	this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-	this->setIcon(config.icon);
-	if(!config.icon.availableSizes().isEmpty())
+	QIcon icon = resolveIcon(config.iconPath);
+	this->setIcon(icon);
+	if(!icon.availableSizes().isEmpty())
 	{
-		auto sizes = config.icon.availableSizes();
+		auto sizes = icon.availableSizes();
 		QSize maxSize = sizes.first();
 		for(QSize &current : sizes)
 		{
@@ -35,17 +40,33 @@ EntryPushButton::EntryPushButton(const EntryConfig &config) : QPushButton()
 	}
 	this->config = config;
 	connect(this, SIGNAL(clicked()), this, SLOT(emitOwnClicked()));
+
+	systemEntryMenu.addAction("Add to favorites", [&] { emit addToFavourites(this->config); });
+	userEntryMenu.addAction("Delete", [&] { emit deleteRequested(this->config); });
 }
 
-
-
+QIcon EntryPushButton::resolveIcon(QString path)
+{
+	if(!path.isEmpty())
+	{
+		if(path[0] == '/')
+		{
+			return QIcon(path);
+		}
+		else
+		{
+			return QIcon::fromTheme(path);
+		}
+	}
+	return QIcon();
+}
 
 void EntryPushButton::emitOwnClicked()
 {
 	emit clicked(this->config);
 }
 
-const EntryConfig &EntryPushButton::getEntryConfig()
+const EntryConfig &EntryPushButton::getEntryConfig() const
 {
 	return this->config;
 }
@@ -65,12 +86,82 @@ void EntryPushButton::showName()
 	this->setText(this->config.name);
 }
 
-int EntryPushButton::getRow() const { return config.row; }
-int EntryPushButton::getCol() const { return config.col; }
-QString EntryPushButton::getName() const { return config.name; }
-QString EntryPushButton::getShortcutKey() const { return config.key; }
-void EntryPushButton::setShortcutKey(QString key) { this->config.key = key; }
-void EntryPushButton::setRow(int row) { this->config.row = row; }
-void EntryPushButton::setCol(int col) { this->config.col = col; }
-QStringList EntryPushButton::getArguments() const { return this->config.arguments; }
-QString EntryPushButton::getCommand() const { return this->config.command; }
+void EntryPushButton::mousePressEvent(QMouseEvent *event)
+{
+	if(event->button() == Qt::LeftButton)
+	{
+		dragStartPosition = event->pos();
+	}
+	if(event->button() == Qt::RightButton)
+	{
+		if(this->config.type == EntryType::USER || this->config.type == EntryType::INHERIT)
+		{
+			this->userEntryMenu.exec(QCursor::pos());
+		}
+		else
+		{
+			this->systemEntryMenu.exec(QCursor::pos());
+		}
+	}
+	return QPushButton::mousePressEvent(event);
+}
+
+void EntryPushButton::mouseMoveEvent(QMouseEvent *event)
+{
+	if(this->config.type == EntryType::SYSTEM)
+	{
+		return;
+	}
+	if(!(event->buttons() & Qt::LeftButton))
+	{
+		return;
+	}
+	if((event->pos() - dragStartPosition).manhattanLength() < QApplication::startDragDistance())
+	{
+		return;
+	}
+
+	QDrag *drag = new QDrag(this);
+	QMimeData *mimeData = new QMimeData();
+	QByteArray data;
+	mimeData->setData(ENTRYBUTTON_MIME_TYPE_STR, data);
+	drag->setMimeData(mimeData);
+	Qt::DropAction dropAction = drag->exec(Qt::MoveAction);
+}
+
+int EntryPushButton::getRow() const
+{
+	return config.row;
+}
+int EntryPushButton::getCol() const
+{
+	return config.col;
+}
+QString EntryPushButton::getName() const
+{
+	return config.name;
+}
+QString EntryPushButton::getShortcutKey() const
+{
+	return config.key;
+}
+void EntryPushButton::setShortcutKey(QString key)
+{
+	this->config.key = key;
+}
+void EntryPushButton::setRow(int row)
+{
+	this->config.row = row;
+}
+void EntryPushButton::setCol(int col)
+{
+	this->config.col = col;
+}
+QStringList EntryPushButton::getArguments() const
+{
+	return this->config.arguments;
+}
+QString EntryPushButton::getCommand() const
+{
+	return this->config.command;
+}

entrypushbutton.h

@@ -18,20 +18,38 @@
 
 #include <QWidget>
 #include <QPushButton>
+#include <QMouseEvent>
+#include <QMenu>
+
 #include "entryprovider.h"
+
+#define ENTRYBUTTON_MIME_TYPE_STR "application/x-qsrun-entrypushbutton"
+
 class EntryPushButton : public QPushButton
 {
 	Q_OBJECT
-private:
+  private:
+	QMenu systemEntryMenu;
+	QMenu userEntryMenu;
 	EntryConfig config;
-private slots:
+	QPoint dragStartPosition;
+
+  private slots:
 	void emitOwnClicked();
 
-signals:
+  signals:
 	void clicked(const EntryConfig &config);
-public:
+	void deleteRequested(EntryConfig &config);
+	void addToFavourites(const EntryConfig &config);
+
+  protected:
+	void mousePressEvent(QMouseEvent *event);
+	void mouseMoveEvent(QMouseEvent *event);
+	QIcon resolveIcon(QString path);
+
+  public:
 	EntryPushButton(const EntryConfig &config);
-	const EntryConfig &getEntryConfig();
+	const EntryConfig &getEntryConfig() const;
 	void setEntryConfig(const EntryConfig &config);
 	void showShortcut();
 	void showName();
@@ -46,6 +64,4 @@ public:
 	void setShortcutKey(QString key);
 };
 
-
-
 #endif // ENTRYPUSHBUTTON_H

window.cpp

@@ -37,6 +37,7 @@ Window::Window(EntryProvider &entryProvider, SettingsProvider &configProvider)
 	createGui();
 	initFromConfig();
 	this->lineEdit->installEventFilter(this);
+	this->setAcceptDrops(true);
 	QFont font;
 	font.setPointSize(48);
 	font.setBold(true);
@@ -117,12 +118,54 @@ void Window::populateGrid(const QVector<EntryPushButton *> &list)
 	}
 }
 
-void Window::buttonClick(const EntryPushButton &config)
+void Window::executeConfig(const EntryConfig &config)
 {
-	QProcess::startDetached(config.getCommand(), config.getArguments());
+	QProcess::startDetached(config.command, config.arguments);
 	this->closeWindow();
 }
 
+void Window::addToFavourites(const EntryConfig &config)
+{
+	std::pair<int, int> cell = getNextFreeCell();
+	EntryConfig userConfig;
+	userConfig.type = EntryType::INHERIT;
+	userConfig.row = cell.first;
+	userConfig.col = cell.second;
+	userConfig.inherit = config.entryPath;
+	QFileInfo fi{config.entryPath};
+	QString entryName = fi.completeBaseName() + ".qsrun";
+	QString entryPath;
+	if(config.type == EntryType::SYSTEM)
+	{
+		entryPath = this->settingsProvider->userEntriesPaths()[0] + "/" + entryName;
+	}
+	else
+	{
+		entryPath = fi.absoluteDir().absoluteFilePath(entryName);
+	}
+	userConfig.entryPath = entryPath;
+	try
+	{
+		entryProvider->saveUserEntry(userConfig);
+	}
+	catch(std::exception &e)
+	{
+		QMessageBox::critical(this, "Failed to save item to favourites", e.what());
+		return;
+	}
+	/*we only want to save a minimal, inherited config. but it should be a "complete" button
+	when we add it to the favourites. the alternative would be to reload the whole config,
+	but that's probably overkill. */
+	userConfig.update(config);
+	userEntryButtons.append(createEntryButton(userConfig));
+}
+
+void Window::deleteEntry(EntryConfig &config)
+{
+	this->entryProvider->deleteUserEntry(config);
+	initFromConfig();
+}
+
 void Window::closeWindow()
 {
 	if(settingsProvider->singleInstanceMode())
@@ -136,6 +179,48 @@ void Window::closeWindow()
 	}
 }
 
+std::pair<int, int> Window::getNextFreeCell()
+{
+	/* Not the most efficient way perhaps but for now it'll do */
+	std::sort(userEntryButtons.begin(), userEntryButtons.end(), [](EntryPushButton *a, EntryPushButton *b) {
+		const EntryConfig &config_a = a->getEntryConfig();
+		const EntryConfig &config_b = b->getEntryConfig();
+		if(config_a.row < config_b.row)
+		{
+			return true;
+		}
+		if(config_a.row > config_b.row)
+		{
+			return false;
+		}
+		return config_a.col < config_b.col;
+	});
+
+	int expectedRow = 1;
+	int expectedCol = 1;
+	int maxCols = this->settingsProvider->getMaxCols();
+	for(EntryPushButton *current : userEntryButtons)
+	{
+		int currentRow = current->getEntryConfig().row;
+		int currentCol = current->getEntryConfig().col;
+
+		if(currentRow != expectedRow || currentCol != expectedCol)
+		{
+			return {expectedRow, expectedCol};
+		}
+		if(expectedCol == maxCols)
+		{
+			expectedCol = 1;
+			++expectedRow;
+		}
+		else
+		{
+			++expectedCol;
+		}
+	}
+	return {expectedRow, expectedCol};
+}
+
 QStringList Window::generatePATHSuggestions(const QString &text)
 {
 	QStringList results;
@@ -170,7 +255,7 @@ void Window::addPATHSuggestion(const QString &text)
 		e.col = 0;
 		e.row = 0;
 		e.command = suggestions[0];
-		e.icon = QIcon::fromTheme(suggestions[0]);
+		e.iconPath = suggestions[0];
 		EntryPushButton *button = createEntryButton(e);
 		clearGrid();
 		grid->addWidget(button, 0, 0);
@@ -247,7 +332,7 @@ void Window::lineEditTextChanged(QString text)
 				e.arguments = arguments.mid(1);
 			}
 			e.command = arguments[0];
-			e.icon = QIcon::fromTheme("utilities-terminal");
+			e.iconPath = "utilities-terminal";
 
 			EntryPushButton *button = createEntryButton(e);
 			clearGrid();
@@ -297,7 +382,7 @@ void Window::keyPressEvent(QKeyEvent *event)
 							   [&key](const EntryPushButton *y) { return y->getShortcutKey() == key; });
 		if(it != buttonsInGrid.end())
 		{
-			buttonClick(**it);
+			executeConfig((*it)->getEntryConfig());
 		}
 	}
 	QWidget::keyPressEvent(event);
@@ -354,7 +439,9 @@ void Window::filterGridFor(QString filter)
 EntryPushButton *Window::createEntryButton(const EntryConfig &entry)
 {
 	EntryPushButton *button = new EntryPushButton(entry);
-	connect(button, &EntryPushButton::clicked, this, &Window::buttonClick);
+	connect(button, &EntryPushButton::clicked, this, &Window::executeConfig);
+	connect(button, &EntryPushButton::addToFavourites, this, &Window::addToFavourites);
+	connect(button, &EntryPushButton::deleteRequested, this, &Window::deleteEntry);
 	return button;
 }
 
@@ -369,7 +456,7 @@ void Window::lineEditReturnPressed()
 
 	if(buttonsInGrid.length() > 0 && this->lineEdit->text().length() > 0)
 	{
-		buttonClick(*buttonsInGrid[0]);
+		executeConfig(buttonsInGrid[0]->getEntryConfig());
 		return;
 	}
 }
@@ -405,3 +492,49 @@ void Window::focusInput()
 {
 	this->lineEdit->setFocus();
 }
+
+void Window::dragEnterEvent(QDragEnterEvent *event)
+{
+	if(event->mimeData()->hasFormat(ENTRYBUTTON_MIME_TYPE_STR))
+	{
+		event->acceptProposedAction();
+	}
+}
+
+void Window::dropEvent(QDropEvent *event)
+{
+	int count = grid->count();
+	for(int i = 0; i < count; i++)
+	{
+		QLayoutItem *current = grid->itemAt(i);
+		if(current->geometry().contains(event->pos()))
+		{
+			EntryPushButton *buttonAtDrop = (EntryPushButton *)current->widget();
+			EntryPushButton *buttonAtSource = (EntryPushButton *)event->source();
+
+			int tmp_row = buttonAtSource->getRow();
+			int tmp_col = buttonAtSource->getCol();
+
+			grid->addWidget(buttonAtSource, buttonAtDrop->getRow(), buttonAtDrop->getCol());
+			buttonAtSource->setRow(buttonAtDrop->getRow());
+			buttonAtSource->setCol(buttonAtDrop->getCol());
+
+			grid->addWidget(buttonAtDrop, tmp_row, tmp_col);
+			buttonAtDrop->setRow(tmp_row);
+			buttonAtDrop->setCol(tmp_col);
+
+			try
+			{
+				this->entryProvider->saveUserEntry(buttonAtDrop->getEntryConfig());
+				this->entryProvider->saveUserEntry(buttonAtSource->getEntryConfig());
+			}
+			catch(std::exception &e)
+			{
+				QMessageBox::critical(this, "Failed to rearrange items", e.what());
+			}
+
+			break;
+		}
+	}
+	event->acceptProposedAction();
+}

window.h

@@ -30,6 +30,9 @@
 #include <QThread>
 #include <QTreeWidget>
 #include <QLabel>
+#include <QMimeData>
+#include <QDebug>
+#include <QRect>
 #include "entrypushbutton.h"
 #include "calculationengine.h"
 #include "settingsprovider.h"
@@ -37,13 +40,17 @@
 class Window : public QWidget
 {
 	Q_OBJECT
-private:
+  protected:
+	void dragEnterEvent(QDragEnterEvent *event);
+	void dropEvent(QDropEvent *event);
+
+  private:
 	EntryProvider *entryProvider;
 	SettingsProvider *settingsProvider;
 	CalculationEngine calcEngine;
 	QString calculationresult;
-	QVector<EntryPushButton*> userEntryButtons;
-	QVector<EntryPushButton*> systemEntryButtons;
+	QVector<EntryPushButton *> userEntryButtons;
+	QVector<EntryPushButton *> systemEntryButtons;
 	QVector<EntryPushButton *> buttonsInGrid;
 	QLabel calculationResultLabel;
 	QString currentCalculationResult;
@@ -56,27 +63,31 @@ private:
 	void keyReleaseEvent(QKeyEvent *event);
 	QVector<EntryPushButton *> generateEntryButtons(const QVector<EntryConfig> &userEntryButtons);
 	void keyPressEvent(QKeyEvent *event);
-	void buttonClick(const EntryPushButton &config);
+	void executeConfig(const EntryConfig &button);
+	void addToFavourites(const EntryConfig &button);
+	void deleteEntry(EntryConfig &config);
 	QLineEdit *lineEdit;
 	QGridLayout *grid;
 	EntryPushButton *createEntryButton(const EntryConfig &config);
 	void lineEditTextChanged(QString text);
 	void addPATHSuggestion(const QString &text);
 	void clearGrid();
-	void addCalcResult(const QString & expression);
+	void addCalcResult(const QString &expression);
 	void initTreeWidgets();
 	QStringList generatePATHSuggestions(const QString &text);
 	void closeWindow();
-private slots:
+	std::pair<int, int> getNextFreeCell();
+
+  private slots:
 	void lineEditReturnPressed();
 	void showCalculationResultContextMenu(const QPoint &point);
-public:
+
+  public:
 	Window(EntryProvider &entryProvider, SettingsProvider &settingsProvider);
 	void setSystemConfig(const QVector<EntryConfig> &config);
 	bool eventFilter(QObject *obj, QEvent *event);
 	void focusInput();
 	~Window();
-
 };
 
 #endif