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titledocument.cpp

/***************************************************************************
                          titledocument.h  -  description
                             -------------------
    begin                : Feb 28 2008
    copyright            : (C) 2008 by Marco Gittler
    email                : g.marco@freenet.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "titledocument.h"

#include <KDebug>
#include <KTemporaryFile>
#include <kio/netaccess.h>
#include <KApplication>
#include <KLocale>
#include <KMessageBox>

#include <QGraphicsScene>
#include <QDomElement>
#include <QGraphicsItem>
#include <QGraphicsRectItem>
#include <QGraphicsTextItem>
#include <QGraphicsSvgItem>
#include <QFontInfo>
#include <QFile>
#include <QTextCursor>


TitleDocument::TitleDocument()
{
    m_scene = NULL;
}

void TitleDocument::setScene(QGraphicsScene* _scene)
{
    m_scene = _scene;
}

QDomDocument TitleDocument::xml(QGraphicsPolygonItem* startv, QGraphicsPolygonItem* endv)
{
    QDomDocument doc;

    QDomElement main = doc.createElement("kdenlivetitle");
    doc.appendChild(main);

    foreach(QGraphicsItem* item, m_scene->items()) {
        QDomElement e = doc.createElement("item");
        QDomElement content = doc.createElement("content");
        QFont font;
        QGraphicsTextItem *t;

        switch (item->type()) {
        case 7:
            e.setAttribute("type", "QGraphicsPixmapItem");
            content.setAttribute("url", item->data(Qt::UserRole).toString());
            break;
        case 13:
            e.setAttribute("type", "QGraphicsSvgItem");
            content.setAttribute("url", item->data(Qt::UserRole).toString());
            break;
        case 3:
            e.setAttribute("type", "QGraphicsRectItem");
            content.setAttribute("rect", rectFToString(((QGraphicsRectItem*)item)->rect().normalized()));
            content.setAttribute("pencolor", colorToString(((QGraphicsRectItem*)item)->pen().color()));
            content.setAttribute("penwidth", ((QGraphicsRectItem*)item)->pen().width());
            content.setAttribute("brushcolor", colorToString(((QGraphicsRectItem*)item)->brush().color()));
            break;
        case 8:
            e.setAttribute("type", "QGraphicsTextItem");
            t = static_cast<QGraphicsTextItem *>(item);
            // Don't save empty text nodes
            if (t->toPlainText().simplified().isEmpty()) continue;
            //content.appendChild(doc.createTextNode(((QGraphicsTextItem*)item)->toHtml()));
            content.appendChild(doc.createTextNode(t->toPlainText()));
            font = t->font();
            content.setAttribute("font", font.family());
            content.setAttribute("font-bold", font.bold());
            content.setAttribute("font-pixel-size", font.pixelSize());
            content.setAttribute("font-italic", font.italic());
            content.setAttribute("font-underline", font.underline());
            content.setAttribute("font-color", colorToString(t->defaultTextColor()));

            // Only save when necessary.
            if (t->data(OriginXLeft).toInt() == AxisInverted) {
                content.setAttribute("kdenlive-axis-x-inverted", t->data(OriginXLeft).toInt());
            }
            if (t->data(OriginYTop).toInt() == AxisInverted) {
                content.setAttribute("kdenlive-axis-y-inverted", t->data(OriginYTop).toInt());
            }
            if (t->textWidth() != -1) {
                content.setAttribute("alignment", t->textCursor().blockFormat().alignment());
            }
            break;
        default:
            continue;
        }
        QDomElement pos = doc.createElement("position");
        pos.setAttribute("x", item->pos().x());
        pos.setAttribute("y", item->pos().y());
        QTransform transform = item->transform();
        QDomElement tr = doc.createElement("transform");
        tr.appendChild(doc.createTextNode(
                           QString("%1,%2,%3,%4,%5,%6,%7,%8,%9").arg(
                               transform.m11()).arg(transform.m12()).arg(transform.m13()).arg(transform.m21()).arg(transform.m22()).arg(transform.m23()).arg(transform.m31()).arg(transform.m32()).arg(transform.m33())
                       )
                      );
        e.setAttribute("z-index", item->zValue());
        pos.appendChild(tr);


        e.appendChild(pos);
        e.appendChild(content);
        if (item->zValue() > -1100) main.appendChild(e);
    }
    if (startv && endv) {
        QDomElement endp = doc.createElement("endviewport");
        QDomElement startp = doc.createElement("startviewport");
        endp.setAttribute("x", endv->pos().x());
        endp.setAttribute("y", endv->pos().y());
        endp.setAttribute("size", endv->sceneBoundingRect().width() / 2);

        startp.setAttribute("x", startv->pos().x());
        startp.setAttribute("y", startv->pos().y());
        startp.setAttribute("size", startv->sceneBoundingRect().width() / 2);

        startp.setAttribute("z-index", startv->zValue());
        endp.setAttribute("z-index", endv->zValue());
        main.appendChild(startp);
        main.appendChild(endp);
    }
    QDomElement backgr = doc.createElement("background");
    QColor color = getBackgroundColor();
    backgr.setAttribute("color", colorToString(color));
    main.appendChild(backgr);

    return doc;
}

/** \brief Get the background color (incl. alpha) from the document, if possibly
  * \returns The background color of the document, inclusive alpha. If none found, returns (0,0,0,0) */
QColor TitleDocument::getBackgroundColor()
{
    QColor color(0, 0, 0, 0);
    if (m_scene) {
        QList<QGraphicsItem *> items = m_scene->items();
        for (int i = 0; i < items.size(); i++) {
            if (items.at(i)->zValue() == -1100) {
                color = ((QGraphicsRectItem *)items.at(i))->brush().color();
                return color;
            }
        }
    }
    return color;
}


bool TitleDocument::saveDocument(const KUrl& url, QGraphicsPolygonItem* startv, QGraphicsPolygonItem* endv)
{
    if (!m_scene)
        return false;

    QDomDocument doc = xml(startv, endv);
    KTemporaryFile tmpfile;
    if (!tmpfile.open()) {
        kWarning() << "/////  CANNOT CREATE TMP FILE in: " << tmpfile.fileName();
        return false;
    }
    QFile xmlf(tmpfile.fileName());
    xmlf.open(QIODevice::WriteOnly);
    xmlf.write(doc.toString().toUtf8());
    if (xmlf.error() != QFile::NoError) {
        xmlf.close();
        return false;
    }
    xmlf.close();
    return KIO::NetAccess::upload(tmpfile.fileName(), url, 0);
}

int TitleDocument::loadDocument(const KUrl& url, QGraphicsPolygonItem* startv, QGraphicsPolygonItem* endv)
{
    QString tmpfile;
    QDomDocument doc;
    if (!m_scene)
        return -1;

    if (KIO::NetAccess::download(url, tmpfile, 0)) {
        QFile file(tmpfile);
        if (file.open(QIODevice::ReadOnly)) {
            doc.setContent(&file, false);
            file.close();
        } else
            return -1;
        KIO::NetAccess::removeTempFile(tmpfile);
        return loadFromXml(doc, startv, endv);
    }
    return -1;
}

int TitleDocument::loadFromXml(QDomDocument doc, QGraphicsPolygonItem* /*startv*/, QGraphicsPolygonItem* /*endv*/)
{
    QDomNodeList titles = doc.elementsByTagName("kdenlivetitle");
    int maxZValue = 0;
    if (titles.size()) {

        QDomNodeList items = titles.item(0).childNodes();
        for (int i = 0; i < items.count(); i++) {
            QGraphicsItem *gitem = NULL;
            kDebug() << items.item(i).attributes().namedItem("type").nodeValue();
            int zValue = items.item(i).attributes().namedItem("z-index").nodeValue().toInt();
            if (zValue > -1000) {
                if (items.item(i).attributes().namedItem("type").nodeValue() == "QGraphicsTextItem") {
                    QDomNamedNodeMap txtProperties = items.item(i).namedItem("content").attributes();
                    QFont font(txtProperties.namedItem("font").nodeValue());
                    font.setBold(txtProperties.namedItem("font-bold").nodeValue().toInt());
                    font.setItalic(txtProperties.namedItem("font-italic").nodeValue().toInt());
                    font.setUnderline(txtProperties.namedItem("font-underline").nodeValue().toInt());
                    // Older Kdenlive version did not store pixel size but point size
                    if (txtProperties.namedItem("font-pixel-size").isNull()) {
                        KMessageBox::information(kapp->activeWindow(), i18n("Some of your text clips were saved with size in points, which means different sizes on different displays. They will be converted to pixel size, making them portable, but you could have to adjust their size."), i18n("Text Clips Updated"));
                        QFont f2;
                        f2.setPointSize(txtProperties.namedItem("font-size").nodeValue().toInt());
                        font.setPixelSize(QFontInfo(f2).pixelSize());
                    } else
                        font.setPixelSize(txtProperties.namedItem("font-pixel-size").nodeValue().toInt());
                    QColor col(stringToColor(txtProperties.namedItem("font-color").nodeValue()));
                    QGraphicsTextItem *txt = m_scene->addText(items.item(i).namedItem("content").firstChild().nodeValue(), font);
                    txt->setDefaultTextColor(col);
                    txt->setTextInteractionFlags(Qt::NoTextInteraction);
                    if (txtProperties.namedItem("alignment").isNull() == false) {
                        txt->setTextWidth(txt->boundingRect().width());
                        QTextCursor cur = txt->textCursor();
                        QTextBlockFormat format = cur.blockFormat();
                        format.setAlignment((Qt::Alignment) txtProperties.namedItem("alignment").nodeValue().toInt());
                        cur.select(QTextCursor::Document);
                        cur.setBlockFormat(format);
                        txt->setTextCursor(cur);
                        cur.clearSelection();
                        txt->setTextCursor(cur);
                    }

                    if (!txtProperties.namedItem("kdenlive-axis-x-inverted").isNull()) {
                        txt->setData(OriginXLeft, txtProperties.namedItem("kdenlive-axis-x-inverted").nodeValue().toInt());
                    }
                    if (!txtProperties.namedItem("kdenlive-axis-y-inverted").isNull()) {
                        txt->setData(OriginYTop, txtProperties.namedItem("kdenlive-axis-y-inverted").nodeValue().toInt());
                    }

                    gitem = txt;
                } else if (items.item(i).attributes().namedItem("type").nodeValue() == "QGraphicsRectItem") {
                    QString rect = items.item(i).namedItem("content").attributes().namedItem("rect").nodeValue();
                    QString br_str = items.item(i).namedItem("content").attributes().namedItem("brushcolor").nodeValue();
                    QString pen_str = items.item(i).namedItem("content").attributes().namedItem("pencolor").nodeValue();
                    double penwidth = items.item(i).namedItem("content").attributes().namedItem("penwidth").nodeValue().toDouble();
                    QGraphicsRectItem *rec = m_scene->addRect(stringToRect(rect), QPen(QBrush(stringToColor(pen_str)), penwidth), QBrush(stringToColor(br_str)));
                    gitem = rec;
                } else if (items.item(i).attributes().namedItem("type").nodeValue() == "QGraphicsPixmapItem") {
                    QString url = items.item(i).namedItem("content").attributes().namedItem("url").nodeValue();
                    QPixmap pix(url);
                    QGraphicsPixmapItem *rec = m_scene->addPixmap(pix);
                    rec->setData(Qt::UserRole, url);
                    gitem = rec;
                } else if (items.item(i).attributes().namedItem("type").nodeValue() == "QGraphicsSvgItem") {
                    QString url = items.item(i).namedItem("content").attributes().namedItem("url").nodeValue();
                    QGraphicsSvgItem *rec = new QGraphicsSvgItem(url);
                    m_scene->addItem(rec);
                    rec->setData(Qt::UserRole, url);
                    gitem = rec;
                }
            }
            //pos and transform
            if (gitem) {
                QPointF p(items.item(i).namedItem("position").attributes().namedItem("x").nodeValue().toDouble(),
                          items.item(i).namedItem("position").attributes().namedItem("y").nodeValue().toDouble());
                gitem->setPos(p);
                gitem->setTransform(stringToTransform(items.item(i).namedItem("position").firstChild().firstChild().nodeValue()));
                int zValue = items.item(i).attributes().namedItem("z-index").nodeValue().toInt();
                if (zValue > maxZValue) maxZValue = zValue;
                gitem->setZValue(zValue);
                gitem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
            }
            if (items.item(i).nodeName() == "background") {
                kDebug() << items.item(i).attributes().namedItem("color").nodeValue();
                QColor color = QColor(stringToColor(items.item(i).attributes().namedItem("color").nodeValue()));
                //color.setAlpha(items.item(i).attributes().namedItem("alpha").nodeValue().toInt());
                QList<QGraphicsItem *> items = m_scene->items();
                for (int i = 0; i < items.size(); i++) {
                    if (items.at(i)->zValue() == -1100) {
                        ((QGraphicsRectItem *)items.at(i))->setBrush(QBrush(color));
                        break;
                    }
                }
            } /*else if (items.item(i).nodeName() == "startviewport" && startv) {
                    QPointF p(items.item(i).attributes().namedItem("x").nodeValue().toDouble(), items.item(i).attributes().namedItem("y").nodeValue().toDouble());
                    double width = items.item(i).attributes().namedItem("size").nodeValue().toDouble();
                    QRectF rect(-width, -width / aspect_ratio, width*2.0, width / aspect_ratio*2.0);
                    kDebug() << width << rect;
                    startv->setPolygon(rect);
                    startv->setPos(p);
                } else if (items.item(i).nodeName() == "endviewport" && endv) {
                    QPointF p(items.item(i).attributes().namedItem("x").nodeValue().toDouble(), items.item(i).attributes().namedItem("y").nodeValue().toDouble());
                    double width = items.item(i).attributes().namedItem("size").nodeValue().toDouble();
                    QRectF rect(-width, -width / aspect_ratio, width*2.0, width / aspect_ratio*2.0);
                    kDebug() << width << rect;
                    endv->setPolygon(rect);
                    endv->setPos(p);
                }*/
        }
    }
    return maxZValue;
}

QString TitleDocument::colorToString(const QColor& c)
{
    QString ret = "%1,%2,%3,%4";
    ret = ret.arg(c.red()).arg(c.green()).arg(c.blue()).arg(c.alpha());
    return ret;
}

QString TitleDocument::rectFToString(const QRectF& c)
{
    QString ret = "%1,%2,%3,%4";
    ret = ret.arg(c.top()).arg(c.left()).arg(c.width()).arg(c.height());
    return ret;
}

QRectF TitleDocument::stringToRect(const QString & s)
{

    QStringList l = s.split(',');
    if (l.size() < 4)
        return QRectF();
    return QRectF(l.at(0).toDouble(), l.at(1).toDouble(), l.at(2).toDouble(), l.at(3).toDouble()).normalized();
}

QColor TitleDocument::stringToColor(const QString & s)
{
    QStringList l = s.split(',');
    if (l.size() < 4)
        return QColor();
    return QColor(l.at(0).toInt(), l.at(1).toInt(), l.at(2).toInt(), l.at(3).toInt());;
}
QTransform TitleDocument::stringToTransform(const QString& s)
{
    QStringList l = s.split(',');
    if (l.size() < 9)
        return QTransform();
    return QTransform(
               l.at(0).toDouble(), l.at(1).toDouble(), l.at(2).toDouble(),
               l.at(3).toDouble(), l.at(4).toDouble(), l.at(5).toDouble(),
               l.at(6).toDouble(), l.at(7).toDouble(), l.at(8).toDouble()
           );
}

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