/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2006-10-12
 * Description : IPTC credits settings page.
 *
 * Copyright (C) 2006-2015 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * 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, 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.
 *
 * ============================================================ */

#include "iptccredits.h"

// Qt includes

#include <QCheckBox>
#include <QLabel>
#include <QPushButton>
#include <QValidator>
#include <QGridLayout>
#include <QApplication>
#include <QStyle>
#include <QLineEdit>

// KDE includes

#include <klocalizedstring.h>

// Local includes

#include "multistringsedit.h"
#include "dmetadata.h"

namespace Digikam
{

class IPTCCredits::Private
{
public:

    Private()
    {
        copyrightCheck   = 0;
        creditCheck      = 0;
        sourceCheck      = 0;
        copyrightEdit    = 0;
        creditEdit       = 0;
        sourceEdit       = 0;
        bylineEdit       = 0;
        bylineTitleEdit  = 0;
        contactEdit      = 0;
    }

    QCheckBox*        copyrightCheck;
    QCheckBox*        creditCheck;
    QCheckBox*        sourceCheck;

    QLineEdit*        copyrightEdit;
    QLineEdit*        creditEdit;
    QLineEdit*        sourceEdit;

    MultiStringsEdit* bylineEdit;
    MultiStringsEdit* bylineTitleEdit;
    MultiStringsEdit* contactEdit;
};

IPTCCredits::IPTCCredits(QWidget* const parent)
    : QWidget(parent),
      d(new Private)
{
    QGridLayout* const grid = new QGridLayout(this);

    // IPTC only accept printable Ascii char.
    QRegExp asciiRx(QLatin1String("[\x20-\x7F]+$"));
    QValidator* const asciiValidator = new QRegExpValidator(asciiRx, this);

    // --------------------------------------------------------

    d->copyrightCheck = new QCheckBox(i18n("Copyright:"), this);
    d->copyrightEdit  = new QLineEdit(this);
    d->copyrightEdit->setClearButtonEnabled(true);
    d->copyrightEdit->setValidator(asciiValidator);
    d->copyrightEdit->setMaxLength(128);
    d->copyrightEdit->setWhatsThis(i18n("Set here the necessary copyright notice. This field is limited "
                                        "to 128 ASCII characters."));

    // --------------------------------------------------------

    d->bylineEdit  = new MultiStringsEdit(this, i18n("Byline:"),
                                          i18n("Set here the name of content creator."),
                                          true, 32);

    // --------------------------------------------------------

    d->bylineTitleEdit  = new MultiStringsEdit(this, i18n("Byline Title:"),
                                               i18n("Set here the title of content creator."),
                                               true, 32);

    // --------------------------------------------------------

    d->creditCheck = new QCheckBox(i18n("Credit:"), this);
    d->creditEdit  = new QLineEdit(this);
    d->creditEdit->setClearButtonEnabled(true);
    d->creditEdit->setValidator(asciiValidator);
    d->creditEdit->setMaxLength(32);
    d->creditEdit->setWhatsThis(i18n("Set here the content provider. "
                                     "This field is limited to 32 ASCII characters."));

    // --------------------------------------------------------

    d->sourceCheck = new QCheckBox(i18nc("original owner of content", "Source:"), this);
    d->sourceEdit  = new QLineEdit(this);
    d->sourceEdit->setClearButtonEnabled(true);
    d->sourceEdit->setValidator(asciiValidator);
    d->sourceEdit->setMaxLength(32);
    d->sourceEdit->setWhatsThis(i18n("Set here the original owner of content. "
                                     "This field is limited to 32 ASCII characters."));

    // --------------------------------------------------------

    d->contactEdit  = new MultiStringsEdit(this, i18n("Contact:"),
                                           i18n("Set here the person or organisation to contact."),
                                           true, 128);

    // --------------------------------------------------------

    QLabel* const note = new QLabel(i18n("<b>Note: "
                 "<b><a href='http://en.wikipedia.org/wiki/IPTC_Information_Interchange_Model'>IPTC</a></b> "
                 "text tags only support the printable "
                 "<b><a href='http://en.wikipedia.org/wiki/Ascii'>ASCII</a></b> "
                 "characters and limit string sizes. "
                 "Use contextual help for details.</b>"), this);
    note->setOpenExternalLinks(true);
    note->setWordWrap(true);
    note->setFrameStyle(QFrame::StyledPanel | QFrame::Raised);

    // --------------------------------------------------------

    grid->addWidget(d->bylineEdit,      0, 0, 1, 3);
    grid->addWidget(d->bylineTitleEdit, 1, 0, 1, 3);
    grid->addWidget(d->contactEdit,     2, 0, 1, 3);
    grid->addWidget(d->creditCheck,     3, 0, 1, 1);
    grid->addWidget(d->creditEdit,      3, 1, 1, 2);
    grid->addWidget(d->sourceCheck,     4, 0, 1, 1);
    grid->addWidget(d->sourceEdit,      4, 1, 1, 2);
    grid->addWidget(d->copyrightCheck,  5, 0, 1, 1);
    grid->addWidget(d->copyrightEdit,   5, 1, 1, 2);
    grid->addWidget(note,               6, 0, 1, 3);
    grid->setColumnStretch(2, 10);
    grid->setRowStretch(7, 10);
    grid->setContentsMargins(QMargins());
    grid->setSpacing(QApplication::style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing));

    // --------------------------------------------------------

    connect(d->copyrightCheck, SIGNAL(toggled(bool)),
            d->copyrightEdit, SLOT(setEnabled(bool)));


    connect(d->creditCheck, SIGNAL(toggled(bool)),
            d->creditEdit, SLOT(setEnabled(bool)));

    connect(d->sourceCheck, SIGNAL(toggled(bool)),
            d->sourceEdit, SLOT(setEnabled(bool)));

    // --------------------------------------------------------

    connect(d->copyrightCheck, SIGNAL(toggled(bool)),
            this, SIGNAL(signalModified()));

    connect(d->bylineEdit, SIGNAL(signalModified()),
            this, SIGNAL(signalModified()));

    connect(d->bylineTitleEdit, SIGNAL(signalModified()),
            this, SIGNAL(signalModified()));

    connect(d->creditCheck, SIGNAL(toggled(bool)),
            this, SIGNAL(signalModified()));

    connect(d->sourceCheck, SIGNAL(toggled(bool)),
            this, SIGNAL(signalModified()));

    connect(d->contactEdit, SIGNAL(signalModified()),
            this, SIGNAL(signalModified()));

    // --------------------------------------------------------

    connect(d->copyrightEdit, SIGNAL(textChanged(QString)),
            this, SIGNAL(signalModified()));

    connect(d->creditEdit, SIGNAL(textChanged(QString)),
            this, SIGNAL(signalModified()));

    connect(d->sourceEdit, SIGNAL(textChanged(QString)),
            this, SIGNAL(signalModified()));
}

IPTCCredits::~IPTCCredits()
{
    delete d;
}

void IPTCCredits::readMetadata(QByteArray& iptcData)
{
    blockSignals(true);
    DMetadata meta;
    meta.setIptc(iptcData);
    QString     data;
    QStringList list;

    d->copyrightEdit->clear();
    d->copyrightCheck->setChecked(false);
    data = meta.getIptcTagString("Iptc.Application2.Copyright", false);

    if (!data.isNull())
    {
        d->copyrightEdit->setText(data);
        d->copyrightCheck->setChecked(true);
    }

    d->copyrightEdit->setEnabled(d->copyrightCheck->isChecked());

    list = meta.getIptcTagsStringList("Iptc.Application2.Byline", false);
    d->bylineEdit->setValues(list);

    list = meta.getIptcTagsStringList("Iptc.Application2.BylineTitle", false);
    d->bylineTitleEdit->setValues(list);

    d->creditEdit->clear();
    d->creditCheck->setChecked(false);
    data = meta.getIptcTagString("Iptc.Application2.Credit", false);

    if (!data.isNull())
    {
        d->creditEdit->setText(data);
        d->creditCheck->setChecked(true);
    }

    d->creditEdit->setEnabled(d->creditCheck->isChecked());

    d->sourceEdit->clear();
    d->sourceCheck->setChecked(false);
    data = meta.getIptcTagString("Iptc.Application2.Source", false);

    if (!data.isNull())
    {
        d->sourceEdit->setText(data);
        d->sourceCheck->setChecked(true);
    }

    d->sourceEdit->setEnabled(d->sourceCheck->isChecked());

    list = meta.getIptcTagsStringList("Iptc.Application2.Contact", false);
    d->contactEdit->setValues(list);

    blockSignals(false);
}

void IPTCCredits::applyMetadata(QByteArray& iptcData)
{
    QStringList oldList, newList;
    DMetadata meta;
    meta.setIptc(iptcData);

    if (d->copyrightCheck->isChecked())
        meta.setIptcTagString("Iptc.Application2.Copyright", d->copyrightEdit->text());
    else
        meta.removeIptcTag("Iptc.Application2.Copyright");

    if (d->bylineEdit->getValues(oldList, newList))
        meta.setIptcTagsStringList("Iptc.Application2.Byline", 32, oldList, newList);
    else
        meta.removeIptcTag("Iptc.Application2.Byline");

    if (d->bylineTitleEdit->getValues(oldList, newList))
        meta.setIptcTagsStringList("Iptc.Application2.BylineTitle", 32, oldList, newList);
    else
        meta.removeIptcTag("Iptc.Application2.BylineTitle");

    if (d->creditCheck->isChecked())
        meta.setIptcTagString("Iptc.Application2.Credit", d->creditEdit->text());
    else
        meta.removeIptcTag("Iptc.Application2.Credit");

    if (d->sourceCheck->isChecked())
        meta.setIptcTagString("Iptc.Application2.Source", d->sourceEdit->text());
    else
        meta.removeIptcTag("Iptc.Application2.Source");

    if (d->contactEdit->getValues(oldList, newList))
        meta.setIptcTagsStringList("Iptc.Application2.Contact", 128, oldList, newList);
    else
        meta.removeIptcTag("Iptc.Application2.Contact");

    iptcData = meta.getIptc();
}

}  // namespace Digikam
