/*
	Copyright 2006-2019 The QElectroTech Team
	This file is part of QElectroTech.

	QElectroTech is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 2 of the License, or
	(at your option) any later version.

	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "xmlelementcollection.h"
#include "nameslist.h"
#include "qetxml.h"
#include "elementslocation.h"
#include "qetproject.h"

/**
 * @brief XmlElementCollection::XmlElementCollection
 * Build an empty collection.
 * The collection start by :
 *		<collection>
 *			<category name="import>
 *			</category>
 *		</collection>
 * All elements and category are stored as child of <category name="import>
 * @param project : the project of this collection
 */
XmlElementCollection::XmlElementCollection(QETProject *project) :
	QObject(project),
	m_project(project)
{
	QDomElement collection = m_dom_document.createElement("collection");
	m_dom_document.appendChild(collection);
	QDomElement import = m_dom_document.createElement("category");
	import.setAttribute("name", "import");
	collection.appendChild(import);

	NamesList names;

	const QChar russian_data[24] = { 0x0418, 0x043C, 0x043F, 0x043E, 0x0440, 0x0442, 0x0438, 0x0440, 0x043E, 0x0432, 0x0430, 0x043D, 0x043D, 0x044B, 0x0435, 0x0020, 0x044D, 0x043B, 0x0435, 0x043C, 0x0435, 0x043D, 0x0442, 0x044B };
	const QChar greek_data[18] = { 0x0395, 0x03b9, 0x03c3, 0x03b7, 0x03b3, 0x03bc, 0x03ad, 0x03bd, 0x03b1, 0x0020, 0x03c3, 0x03c4, 0x03bf, 0x03b9, 0x03c7, 0x03b5, 0x03af, 0x03b1 };
	const QChar turkish_data[12] ={ 0x0130, 0x0074, 0x0068, 0x0061, 0x006C, 0x0020, 0x00F6, 0x011F, 0x0065, 0x006C, 0x0065, 0x0072 };
	names.addName("fr", "Éléments importés");
	names.addName("en", "Imported elements");
	names.addName("de", "Importierte elemente");
	names.addName("es", "Elementos importados");
	names.addName("ru", QString(russian_data, 24));
	names.addName("cs", "Zavedené prvky");
	names.addName("pl", "Elementy importowane");
	names.addName("pt", "elementos importados");
	names.addName("it", "Elementi importati");
	names.addName("el", QString(greek_data, 18));
	names.addName("nl", "Elementen geïmporteerd");
	names.addName("hr", "Uvezeni elementi");
	names.addName("ca", "Elements importats");
	names.addName("ro", "Elemente importate");
	names.addName("tr", QString(turkish_data, 12));
	names.addName("da", "Importerede elementer");
	names.addName("hr", "Uvezeni elementi");
	names.addName("sl", "Uvoženi elementi");
	

	import.appendChild(names.toXml(m_dom_document));
}

/**
 * @brief XmlElementCollection::XmlElementCollection
 * Constructor with an collection. The tagName of @dom_element must be "collection"
 * @param dom_element -the collection in a dom_element (the dom element in cloned)
 * @param project : the project of this collection
 */
XmlElementCollection::XmlElementCollection(const QDomElement &dom_element, QETProject *project) :
	QObject(project),
	m_project(project)
{
	if (dom_element.tagName() == "collection")
		m_dom_document.appendChild(m_dom_document.importNode(dom_element, true));
	else
		qDebug() << "XmlElementCollection : tagName of dom_element is not collection";
}

/**
 * @brief XmlElementCollection::root
 * The root is the first DOM-Element the xml collection, the tag name
 * of the dom element is : collection
 * @return The root QDomElement of the collection
 */
QDomElement XmlElementCollection::root() const {
	return m_dom_document.documentElement();
}

/**
 * @brief XmlElementCollection::importCategory
 * @return The QDomElement import (the begining of a xml collection) or
 * a null QDomElement if doesn't exist.
 */
QDomElement XmlElementCollection::importCategory() const {
	return root().firstChildElement("category");
}

/**
 * @brief XmlElementCollection::childs
 * @param parent_element
 * @return All childs element in the @parent_element tree
 */
QDomNodeList XmlElementCollection::childs(const QDomElement &parent_element) const
{
	if (parent_element.ownerDocument() != m_dom_document) return QDomNodeList();
	return parent_element.childNodes();
}

/**
 * @brief XmlElementCollection::child
 * If parent_element have child element with an attribute name = @child_name, return it, else return a null QDomElement.
 * Only search for element with tag-name "category" and "element" (if child_name end with ".elmt")
 * @param parent_element : the parent DomElement where we search for child.
 * @parent_element must be a child node of this XmlElementCollection.
 * @param child_name : name of child to search.
 * @return The child QDomElement or a null QDomElement if not found
 */
QDomElement XmlElementCollection::child(const QDomElement &parent_element, const QString &child_name) const
{
	if (parent_element.ownerDocument() != m_dom_document) return QDomElement();

		//Get all childs element of parent_element
	QDomNodeList child_list = parent_element.childNodes();
	QString tag_name(child_name.endsWith(".elmt")? "element" : "category");
	QList <QDomElement> found_dom_element;
	for (int i=0 ; i<child_list.length() ; i++)
	{
		QDomElement child_element = child_list.item(i).toElement();
		if (child_element.tagName() == tag_name) found_dom_element << child_element;
	}

	if (found_dom_element.isEmpty()) return QDomElement();

	foreach (QDomElement elmt, found_dom_element)
		if (elmt.attribute("name") == child_name)
			return elmt;

	return QDomElement();
}

/**
 * @brief XmlElementCollection::child
 * @param path
 * @return the DomElement at path if exist, else return a null QDomElement
 */
QDomElement XmlElementCollection::child(const QString &path) const
{
	QStringList path_list = path.split("/");
	if (path_list.isEmpty()) return QDomElement();

	QDomElement parent_element = root();
	foreach (QString str, path_list)
	{
		QDomElement child_element = child(parent_element, str);

		if (child_element.isNull())
			return QDomElement();
		else
			parent_element = child_element;
	}

	return parent_element;
}

/**
 * @brief XmlElementCollection::directories
 * @param parent_element
 * @return A list of directory stored in @parent_element
 */
QList<QDomElement> XmlElementCollection::directories(const QDomElement &parent_element) const
{
	QList <QDomElement> directory_list;
	QDomNodeList node_list = childs(parent_element);
	if (node_list.isEmpty()) return directory_list;

	for (int i=0 ; i < node_list.count() ; i++)
	{
		QDomNode node = node_list.at(i);
		if (node.isElement() &&  node.toElement().tagName() == "category")
			directory_list << node.toElement();
	}

	return directory_list;
}

/**
 * @brief XmlElementCollection::directoriesNames
 * @param parent_element
 * @return a list of names for every child directories of @parent_element
 */
QStringList XmlElementCollection::directoriesNames(const QDomElement &parent_element) const
{
	QList <QDomElement> childs = directories(parent_element);
	QStringList names;

	foreach (QDomElement child, childs)
	{
		QString name = child.attribute("name");
		if (!name.isEmpty())
			names.append(name);
	}

	return names;
}

/**
 * @brief XmlElementCollection::elements
 * @param parent_element
 * @return A list of element stored in @parent_element
 */
QList<QDomElement> XmlElementCollection::elements(const QDomElement &parent_element) const
{
	QList <QDomElement> element_list;
	QDomNodeList node_list = childs(parent_element);
	if (node_list.isEmpty()) return element_list;

	for (int i=0 ; i < node_list.count() ; i++)
	{
		QDomNode node = node_list.at(i);
		if (node.isElement() &&  node.toElement().tagName() == "element")
			element_list << node.toElement();
	}

	return element_list;
}

/**
 * @brief XmlElementCollection::elementsNames
 * @param parent_element
 * @return A list of names fr every childs element of @parent_element
 */
QStringList XmlElementCollection::elementsNames(const QDomElement &parent_element) const
{
	QList <QDomElement> childs = elements(parent_element);
	QStringList names;

	foreach (QDomElement child, childs)
	{
		QString name = child.attribute("name");
		if (!name.isEmpty())
			names.append(name);
	}

	return names;
}

/**
 * @brief XmlElementCollection::element
 * @param path : path of the element in this collection
 * @return the QDomElement that represent the element at path @path
 * or a null QDomElement if not found or doesn't represent an element
 */
QDomElement XmlElementCollection::element(const QString &path) const
{
	if (!path.endsWith(".elmt")) return QDomElement();

	QDomElement element = child(path);

	if (element.tagName() == "element")
		return element;
	else
		return QDomElement();
}

/**
 * @brief XmlElementCollection::directory
 * @param path : path of the directory in this collection
 * @return the QDomElement that represent the directory at path @path
 * or a null QDomElement if not found.
 */
QDomElement XmlElementCollection::directory(const QString &path) const
{
	QDomElement directory = child(path);

	if (directory.tagName() == "category")
		return directory;
	else
		return QDomElement();
}

/**
 * @brief XmlElementCollection::addElement
 * Add the element at location to this collection.
 * The element is copied in this collection in "import" dir with the same path, in other word
 * if the path is dir1/dir2/dir3/myElement.elmt, myElement is copied to this collection at the path : import/dir1/dir2/dir3/myElement.elmt
 * If the path doesn't exist, he was created.
 * If the element already exist, do nothing.
 * @param location, location of the element
 * @return the collection path of the added item or a null QString if element can't be added.
 */
QString XmlElementCollection::addElement(ElementsLocation &location)
{
		//location must be an element and exist
	if (!(location.exist() && location.isElement()))
		return QString();

		//Add an element from this collection to this collection have no sense
	if (location.isProject() && location.projectCollection() == this)
		return QString();

		//First we check if this location exist in this collection if so, we do nothing
	if ( exist("import/" + location.collectionPath(false)) )
		return QString();

		//Get the import dir of this collection
	QDomElement parent_element = importCategory();
	if (parent_element.isNull())
		return QString();

	QString integrated_path = parent_element.attribute("name");

		//Split the path
	QStringList splitted_path = location.collectionPath(false).split("/");
	if (splitted_path.isEmpty())
		return QString();

	if (location.isFileSystem()) {
			//Get the root dir of the filesystem collection
		QDir dir(location.fileSystemPath().remove(location.collectionPath(false)));
		if (!dir.exists())
			return QString();

		foreach(QString str, splitted_path) {
			QDomElement child_element = child(parent_element, str);

				//Child doesn't exist, we create it
			if (child_element.isNull()) {
				QDomElement created_child;

					//str is the path of an element, we integrate an element
				if (str.endsWith(".elmt")) {
					QFile element_file(dir.filePath(str));
					if (!element_file.exists())
						return QString();

					created_child = QETXML::fileSystemElementToXmlCollectionElement(m_dom_document, element_file);
				}

					//str is the path of a directory, we integrate a directory.
				else {
						//Dir doesn't exist.
					if (!dir.cd(str))
						return QString();

					created_child = QETXML::fileSystemDirToXmlCollectionDir(m_dom_document, dir);
				}

				if(created_child.isNull())
					return QString();

				parent_element.appendChild(created_child);
				parent_element = created_child;
			}
				//Child exist
			else {
				if (!dir.cd(str))
					return QString();

				parent_element = child_element;
			}

			integrated_path.append("/"+str);
		}
	}
	else if (location.isProject()) {
		QString path;
		foreach(QString str, splitted_path) {
			if (path.isEmpty())
				path = str;
			else
				path = path + "/" + str;

			QDomElement child_element = child(parent_element, str);

				//Child doesn't exist, we create it
			if (child_element.isNull()) {
				QDomElement created_child;

					//str is the path of an element, we integrate an element
				if (str.endsWith(".elmt")) {
					created_child = m_dom_document.createElement("element");
					created_child.setAttribute("name", str);

					created_child.appendChild(location.xml().cloneNode(true));
				}

					//str is the path of a directory, we integrate a directory.
				else {
					created_child = m_dom_document.createElement("category");
					created_child.setAttribute("name", str);

					ElementsLocation sub_dir_location(path, location.project());
					QDomElement names_element = sub_dir_location.nameList().toXml(m_dom_document);
					created_child.appendChild(names_element);
				}

				if(created_child.isNull())
					return QString();

				parent_element.appendChild(created_child);
				parent_element = created_child;
			}
				//Child exist
			else
				parent_element = child_element;

			integrated_path.append("/"+str);
		}
	}

	emit elementAdded(integrated_path);
	return integrated_path;
}

/**
 * @brief XmlElementCollection::addElementDefinition
 * Add the élément defintion @xml_definition in the directory at path @dir_path with the name @elmt_name.
 * @param dir_path : the path of the directory where we must add the element.
 * The path must be an existing directory of this collection.
 * @param elmt_name : The name used to store the element (the name must end with .elmt, if not, .elmt will be append to @elmt_name)
 * @param xml_definition : The xml definition of the element.
 * The tag name of @xml_definition must be "definition".
 * @return True if the element is added with success.
 */
bool XmlElementCollection::addElementDefinition(const QString &dir_path, const QString &elmt_name, const QDomElement &xml_definition)
{
	QDomElement dom_dir = directory(dir_path);
	if (dom_dir.isNull()) {
		qDebug() << "XmlElementCollection::addElementDefinition : No directory at path : " << dir_path;
		return false;
	}

	if (xml_definition.tagName() != "definition") {
		qDebug() << "XmlElementCollection::addElementDefinition : xml_defintion tag name is not \"definition\"";
		return false;
	}

	QString name = elmt_name;
	if (!name.endsWith(".elmt")) {
		name += ".elmt";
	}

	QDomElement dom_elmt = m_dom_document.createElement("element");
	dom_elmt.setAttribute("name", name);
	dom_elmt.appendChild(xml_definition.cloneNode(true));
	dom_dir.appendChild(dom_elmt);

	emit elementAdded(dir_path + "/" + name);

	return true;
}

/**
 * @brief XmlElementCollection::removeElement
 * Remove the element at path @path.
 * @param path
 * @return True if element is removed and emit the signal elementRemoved.
 * else false.
 */
bool XmlElementCollection::removeElement(const QString& path)
{
	QDomElement elmt = element(path);

	if (!elmt.isNull()) {
		elmt.parentNode().removeChild(elmt);
		emit elementRemoved(path);
		return true;
	}

	return false;
}

/**
 * @brief XmlElementCollection::copy
 * Copy the content represented by source (an element or a directory) to destination.
 * Destination must be a directory of this collection.
 * If the destination already have an item at the same path of source, he will be replaced by source.
 * @param source : content to copy
 * @param destination : destination of the copy, must be a directory of this collection
 * @param rename : rename the copy with @rename else use the name of source
 * @param deep_copy : if true copy all childs of source (only if source is directory)
 * @return the ElementLocation that represent the copy, if copy failed return a null ElementLocation
 */
ElementsLocation XmlElementCollection::copy(ElementsLocation &source, ElementsLocation &destination, const QString& rename, bool deep_copy)
{
	if (!(source.exist() && destination.isDirectory() && destination.isProject() && destination.projectCollection() == this))
		return ElementsLocation();

	if (source.isElement())
		return copyElement(source, destination, rename);
	else
		return copyDirectory(source, destination, rename, deep_copy);
}

/**
 * @brief XmlElementCollection::exist
 * Return true if the path @path exist in this collection
 * @param path
 * @return
 */
bool XmlElementCollection::exist(const QString &path) const
{
	if (child(path).isNull())
		return false;
	else
		return true;
}

/**
 * @brief XmlElementCollection::createDir
 * Create a child directorie at path @path with the name @name.
 * Emit directorieAdded if success.
 * @param path : path of parent diectorie
 * @param name : name of the directori to create.
 * @param name_list : translation of the directorie name.
 * @return true if creation success, if directorie already exist return true.
 */
bool XmlElementCollection::createDir(const QString& path, const QString& name, const NamesList &name_list)
{
	QString new_dir_path = path + "/" + name;

	if (!directory(new_dir_path).isNull()) {
		return true;
	}

	QDomElement parent_dir = directory(path);
	if (parent_dir.isNull()) {
		qDebug() << "XmlElementCollection::createDir : directorie at path doesn't exist";
		return false;
	}

	QDomElement new_dir = m_dom_document.createElement("category");
	new_dir.setAttribute("name", name);
	new_dir.appendChild(name_list.toXml(m_dom_document));

	parent_dir.appendChild(new_dir);

	emit directorieAdded(new_dir_path);

	return true;
}

/**
 * @brief XmlElementCollection::removeDir
 * Remove the directory at path @path.
 * @param path
 * @return true if successfuly removed and emit directoryRemoved(QString),
 * else false.
 */
bool XmlElementCollection::removeDir(const QString& path)
{
	QDomElement dir = directory(path);
	if (!dir.isNull()) {
		dir.parentNode().removeChild(dir);
		emit directoryRemoved(path);
		return true;
	}
	return false;
}

/**
 * @brief XmlElementCollection::elementsLocation
 * Return all locations stored in dom_element (element and directory).
 * If dom_element is null, return all location owned by this collection
 * dom_element must be a child of this collection.
 * @param dom_element : dom_element where we must to search location.
 * @param childs = if true return all childs location of dom_element, if false, only return the direct childs location of dom_element.
 * @return
 */
QList<ElementsLocation> XmlElementCollection::elementsLocation(QDomElement dom_element, bool childs) const
{
	QList <ElementsLocation> location_list;

	if (dom_element.isNull())
		dom_element = m_dom_document.documentElement();

	if (dom_element.ownerDocument() != m_dom_document)
		return location_list;

		//get element childs
	QList <QDomElement> element_list = elements(dom_element);

	foreach (QDomElement elmt, element_list) {
		ElementsLocation location = domToLocation(elmt);
		if (location.exist())
			location_list << location;
	}

		//get directory childs
	QList <QDomElement> directory_list = directories(dom_element);

	foreach (QDomElement dir, directory_list) {
		ElementsLocation location = domToLocation(dir);
		if (location.exist())
			location_list << location;

		if (childs)
			location_list.append(elementsLocation(dir, childs));
	}

	return location_list;
}

/**
 * @brief XmlElementCollection::domToLocation
 * Return the element location who represent the xml element : dom_element
 * dom_element must be owned by this collection
 * @param dom_element : the dom_element of this collection that represent an element.
 * The tag name of dom_element must be "element"
 * @return the element location, location can be null if fail.
 */
ElementsLocation XmlElementCollection::domToLocation(QDomElement dom_element) const
{
	if (dom_element.ownerDocument() == m_dom_document) {
		QString path = dom_element.attribute("name");

		while (!dom_element.parentNode().isNull() && dom_element.parentNode().isElement()) {
			dom_element = dom_element.parentNode().toElement();

			if (dom_element.tagName() == "category")
				path.prepend(dom_element.attribute("name") + "/");
		}

		return ElementsLocation(path, m_project);
	}
	else
		return ElementsLocation();
}

/**
 * @brief XmlElementCollection::cleanUnusedElement
 * Remove elements in this collection which is not used in the owner project
 */
void XmlElementCollection::cleanUnusedElement()
{
	foreach (ElementsLocation loc, m_project->unusedElements())
		removeElement(loc.collectionPath(false));
}

/**
 * @brief XmlElementCollection::cleanUnusedDirectory
 * Remove the empty directories of this collection
 */
void XmlElementCollection::cleanUnusedDirectory()
{
	QDomNodeList lst = importCategory().elementsByTagName("category");

	for(int i=0 ; i<lst.size() ; i++) {
		QDomElement dir = lst.item(i).toElement();
			//elmt haven't got child node "element" or "category", so he is emty, we can remove it
		if (dir.elementsByTagName("element").isEmpty() && dir.elementsByTagName("category").isEmpty()) {
			if (removeDir(domToLocation(dir).collectionPath(false)))
				i=-1;
		}
	}
}

/**
 * @brief XmlElementCollection::copyDirectory
 * Copy the directory represented by source to destination.
 * if destination have a directory with the same name as source, then this directory is removed
 * @param source : directory to copy
 * @param destination : destination of the copy
 * @param rename : rename the copy with @rename else use the name of source
 * @param deep_copy :if true copy all childs of source
 * @return the ElementLocation that represent the copy, if copy failed return a null ElementLocation
 */
ElementsLocation XmlElementCollection::copyDirectory(ElementsLocation &source, ElementsLocation &destination, const QString& rename, bool deep_copy)
{
	QString new_dir_name = rename.isEmpty() ? source.fileName() : rename;

			//Get the xml directory where the new directory must be added
	QDomElement parent_dir_dom = directory(destination.collectionPath(false));
	if (parent_dir_dom.isNull()) return ElementsLocation();

		//Remove the previous directory with the same path
	QDomElement element = child(destination.collectionPath(false) + "/" + new_dir_name);
	if (!element.isNull()) {
		element.parentNode().removeChild(element);
		emit directoryRemoved(destination.collectionPath(false) + "/" + new_dir_name);
	}

	ElementsLocation created_location;

		//Copy with a file system collection source
	if (source.isFileSystem())
	{
		QDir source_dir(source.fileSystemPath());
		if (!source_dir.exists()) return ElementsLocation();


		QDir dir(source.fileSystemPath());
		QDomElement elmt_dom = QETXML::fileSystemDirToXmlCollectionDir(m_dom_document, dir, new_dir_name);
		if (elmt_dom.isNull()) return ElementsLocation();

		parent_dir_dom.appendChild(elmt_dom);

		created_location.setPath(destination.projectCollectionPath() + "/" + new_dir_name);

		if (deep_copy)
		{
				//Append all directories of source to the new created directory
			foreach(QString str, source_dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot, QDir::Name))
			{
				ElementsLocation sub_source(source.fileSystemPath() + "/" + str);
				copyDirectory(sub_source, created_location);
			}

				//Append all elements of source to the new created directory
			source_dir.setNameFilters(QStringList() << "*.elmt");
			foreach(QString str, source_dir.entryList(QDir::Files | QDir::NoDotAndDotDot, QDir::Name))
			{
				ElementsLocation sub_source(source.fileSystemPath() + "/" + str);
				copyElement(sub_source, created_location);
			}
		}
	}

		//Copy with a xml collection source
	else
	{
		if (!source.projectCollection()) return ElementsLocation();

		QDomNode other_collection_node = source.projectCollection()->child(source.collectionPath(false)).cloneNode(deep_copy);

			//We don't make a deep copy, but we must to get the local names of the copied directory
		if (!deep_copy) {
			QDomNode names = source.projectCollection()->child(source.collectionPath(false)).namedItem("names");
			if (!names.isNull() && names.isElement())
				other_collection_node.appendChild(names.cloneNode(true));
		}

		if (other_collection_node.isNull()) return ElementsLocation();

		QDomElement other_collection_dom_dir = other_collection_node.toElement();
		other_collection_dom_dir.setAttribute("name", new_dir_name);
		parent_dir_dom.appendChild(other_collection_dom_dir);

		created_location.setPath(destination.projectCollectionPath() + "/" + new_dir_name);
	}

	emit directorieAdded(created_location.collectionPath(false));
	return created_location;
}

/**
 * @brief XmlElementCollection::copyElement
 * Copy the element represented by source to destination (must be a directory)
 * If element already exist in destination he will be replaced by the new.
 * @param source : element to copy
 * @param destination : destination of the copy
 * @param rename : rename the copy with @rename else use the name of source
 * @return The ElementsLocation of the copy
 */
ElementsLocation XmlElementCollection::copyElement(ElementsLocation &source, ElementsLocation &destination, const QString& rename)
{
	QString new_elmt_name = rename.isEmpty() ? source.fileName() : rename;

	QDomElement elmt_dom;

		//Copy with a file system collection source
	if (source.isFileSystem())
	{
		QFile file(source.fileSystemPath());
		elmt_dom = QETXML::fileSystemElementToXmlCollectionElement(m_dom_document, file, new_elmt_name);
		if (elmt_dom.isNull()) return ElementsLocation();
	}
		//Copy with a xml collection source
	else
	{
		QDomElement other_collection = source.xml();
		elmt_dom = m_dom_document.createElement("element");
		elmt_dom.setAttribute("name", new_elmt_name);
		elmt_dom.appendChild(other_collection.cloneNode());
	}


		//Remove the previous element with the same path
	QDomElement element = child(destination.collectionPath(false) + "/" + new_elmt_name);
	bool removed = false;
	if (!element.isNull()) {
		element.parentNode().removeChild(element);
		removed = true;
	}

		//Get the xml directory where the new element must be added
	QDomElement dir_dom = directory(destination.collectionPath(false));
	if (dir_dom.isNull()) return ElementsLocation();
	dir_dom.appendChild(elmt_dom);

	ElementsLocation copy_loc(destination.projectCollectionPath() + "/" + new_elmt_name);

	if (removed) {
		emit elementChanged(copy_loc.collectionPath(false));
	}
	else {
		emit elementAdded(copy_loc.collectionPath(false));
	}

	return copy_loc;
}