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/*
 * Copyright (c) 2010-2015 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/QtUI/QtAboutWidget.h>

#include <QCoreApplication>
#include <QFile>
#include <QIcon>
#include <QLabel>
#include <QPushButton>
#include <QTextEdit>
#include <QTextStream>
#include <QVBoxLayout>
#include <QtGlobal>

#include <Swiften/Base/Platform.h>

namespace Swift {

QtAboutWidget::QtAboutWidget() : QDialog() {
#ifndef Q_OS_MAC
	setWindowTitle(QString(tr("About %1")).arg("Swift"));
#endif
	setWindowIcon(QIcon(":/logo-icon-16.png"));

	resize(180, 240);
	QVBoxLayout *mainLayout = new QVBoxLayout(this);
	mainLayout->setAlignment(Qt::AlignHCenter);
	setLayout(mainLayout);
	
	QLabel* iconLabel = new QLabel(this);
	iconLabel->setPixmap(QIcon(":/logo-shaded-text.256.png").pixmap(90, 90));
	iconLabel->setAlignment(Qt::AlignHCenter);
	mainLayout->addWidget(iconLabel);
	
	QLabel* appNameLabel = new QLabel("<center><font size='+1'><b>" + QCoreApplication::applicationName() + "</b></font></center>", this);
	mainLayout->addWidget(appNameLabel);
	
	QLabel* versionLabel = new QLabel(QString("<center><font size='-1'>") + tr("Version %1").arg(QCoreApplication::applicationVersion()) + "</font></center>", this);
	mainLayout->addWidget(versionLabel);

	QString buildString = QString("<center><font size='-1'>") + QString(tr("Built with Qt %1")).arg(QT_VERSION_STR);
	buildString += QString("<br/>") + QString(tr("Running with Qt %1")).arg(qVersion());
	buildString += "</font></center>";
	QLabel* buildLabel = new QLabel(buildString, this);
	mainLayout->addWidget(buildLabel);

	if (QCoreApplication::translate("TRANSLATION_INFO", "TRANSLATION_AUTHOR") != "TRANSLATION_AUTHOR") {
		mainLayout->addWidget(new QLabel(QString("<center><font size='-1'>") + QString(tr("Using the English translation by\n%1")).arg(QCoreApplication::translate("TRANSLATION_INFO", "TRANSLATION_AUTHOR")).replace("\n", "<br/>") + "</font></center>", this));
	}
	QCoreApplication::translate("TRANSLATION_INFO", "TRANSLATION_LICENSE", "This string contains the license under which this translation is licensed. We ask you to license the translation under the BSD license. Please read http://www.opensource.org/licenses/bsd-license.php, and if you agree to release your translation under this license, use the following (untranslated) text: 'This translation is licensed under the BSD License. See http://www.opensource.org/licenses/bsd-license.php'");
#if defined(SWIFTEN_PLATFORM_WINDOWS) || defined(SWIFTEN_PLATFORM_MACOSX)
	QPushButton* licenseButton = new QPushButton(tr("View License"), this);
	mainLayout->addWidget(licenseButton);
	connect(licenseButton, SIGNAL(clicked()), this, SLOT(handleLicenseClicked()));
#else
	// Some Linux desktops have dialog window decorations without close window buttons.
	// This code adds a dedicated button to close the about window dialog.
	QHBoxLayout* buttonLayout = new QHBoxLayout();
	mainLayout->addLayout(buttonLayout);

	QPushButton* licenseButton = new QPushButton(tr("View License"), this);
	buttonLayout->addWidget(licenseButton);
	connect(licenseButton, SIGNAL(clicked()), this, SLOT(handleLicenseClicked()));

	buttonLayout->addItem(new QSpacerItem(20,20));

	QPushButton* closeButton = new QPushButton(tr("Close"), this);
	buttonLayout->addWidget(closeButton);
	connect(closeButton, SIGNAL(clicked()), this, SLOT(accept()));
#endif
	setFixedSize(minimumSizeHint());
}

void QtAboutWidget::handleLicenseClicked() {
	QTextEdit* text = new QTextEdit();
	text->setAttribute(Qt::WA_DeleteOnClose);
	text->setReadOnly(true);
	QFile file(":/COPYING");
	file.open(QIODevice::ReadOnly);
	QTextStream in(&file);
	in.setCodec("UTF-8");
	text->setPlainText(in.readAll());
	file.close();
	text->resize(500, 600);
	text->show();
	text->activateWindow();
}

}