// Copyright (C) 2008  Lukas Lalinsky
//
// This program 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.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

#include "line.h"
#include "hub.h"
#include "diagramdocument.h"
#include "diagramobject.h"
#include "connector.h"

Line::Line(DiagramItem *parent)
	: DiagramItem(parent)
{
	m_connectors[0] = new Connector(this);
	m_connectors[1] = new Connector(this);
	setZValue(1.0);
}

Line::~Line()
{
	delete m_connectors[0];
	delete m_connectors[1];
}

Connector *
Line::connector(int index) const
{
	Q_ASSERT(index == 0 || index == 1);
	return m_connectors[index];
}

void
Line::updateLayout()
{
}

#include "domutils.h"

void
Line::loadFromXml(QDomElement element, DiagramDocument *document)
{
	DiagramItem::loadFromXml(element, document);
	QDomElement lineElement = element.firstChildElement("line");
	if (lineElement.isNull())
		return;
	QDomElement connectorListElement = lineElement.firstChildElement("connector-list");
	if (connectorListElement.isNull())
		return;

	QDomElement connectorElement = connectorListElement.firstChildElement("connector");
	int i = 0;
	while (!connectorElement.isNull()) {
		Connector *connector = m_connectors[i++];
		qreal angle = readFloatElement(connectorElement, "angle");
		connector->setAngle(angle);
		connector->setPos(readPointElement(connectorElement, "position"));
		QDomElement hubElement = connectorElement.firstChildElement("hub");
		QString ownerId = hubElement.attribute("owner");
		if (document && !ownerId.isEmpty()) {
			DiagramObject *owner = qobject_cast<DiagramObject *>(document->itemById(ownerId));
			connector->setHub(owner->hub());
		}
		connectorElement = connectorElement.nextSiblingElement("connector");
	}
}

void
Line::saveToXml(QDomDocument doc, QDomElement element)
{
	DiagramItem::saveToXml(doc, element);
	QDomElement lineElement = doc.createElement("line");
	element.appendChild(lineElement);
	QDomElement connectorListElement = doc.createElement("connector-list");
	lineElement.appendChild(connectorListElement);
	for (int i = 0; i < 2; i++) {
		Connector *connector = m_connectors[i];
		QDomElement connectorElement = doc.createElement("connector");
		connectorListElement.appendChild(connectorElement);
		appendPointElement(doc, connectorElement, "position", connector->pos());
		appendFloatElement(doc, connectorElement, "angle", connector->angle());
		if (connector->hub()) {
			QDomElement hubElement = doc.createElement("hub");
			connectorElement.appendChild(hubElement);
			hubElement.setAttribute("owner", connector->hub()->owner()->id());
		}
	}
}