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// Copyright (c) 2011-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <qt/notificator.h>
#include <QApplication>
#include <QByteArray>
#include <QImageWriter>
#include <QMessageBox>
#include <QMetaType>
#include <QStyle>
#include <QSystemTrayIcon>
#include <QTemporaryFile>
#include <QVariant>
#ifdef USE_DBUS
#include <QDBusMetaType>
#include <QtDBus>
#include <stdint.h>
#endif
#ifdef Q_OS_MACOS
#include <qt/macnotificationhandler.h>
#endif
#ifdef USE_DBUS
// https://wiki.ubuntu.com/NotificationDevelopmentGuidelines recommends at least 128
const int FREEDESKTOP_NOTIFICATION_ICON_SIZE = 128;
#endif
Notificator::Notificator(const QString &_programName, QSystemTrayIcon *_trayIcon, QWidget *_parent) :
QObject(_parent),
parent(_parent),
programName(_programName),
trayIcon(_trayIcon)
{
if(_trayIcon && _trayIcon->supportsMessages())
{
mode = QSystemTray;
}
#ifdef USE_DBUS
interface = new QDBusInterface("org.freedesktop.Notifications",
"/org/freedesktop/Notifications", "org.freedesktop.Notifications");
if(interface->isValid())
{
mode = Freedesktop;
}
#endif
#ifdef Q_OS_MACOS
// check if users OS has support for NSUserNotification
if( MacNotificationHandler::instance()->hasUserNotificationCenterSupport()) {
mode = UserNotificationCenter;
}
#endif
}
Notificator::~Notificator()
{
#ifdef USE_DBUS
delete interface;
#endif
}
#ifdef USE_DBUS
// Loosely based on https://www.qtcentre.org/archive/index.php/t-25879.html
class FreedesktopImage
{
public:
FreedesktopImage() = default;
explicit FreedesktopImage(const QImage &img);
// Image to variant that can be marshalled over DBus
static QVariant toVariant(const QImage &img);
private:
int width, height, stride;
bool hasAlpha;
int channels;
int bitsPerSample;
QByteArray image;
friend QDBusArgument &operator<<(QDBusArgument &a, const FreedesktopImage &i);
friend const QDBusArgument &operator>>(const QDBusArgument &a, FreedesktopImage &i);
};
Q_DECLARE_METATYPE(FreedesktopImage);
// Image configuration settings
const int CHANNELS = 4;
const int BYTES_PER_PIXEL = 4;
const int BITS_PER_SAMPLE = 8;
FreedesktopImage::FreedesktopImage(const QImage &img):
width(img.width()),
height(img.height()),
stride(img.width() * BYTES_PER_PIXEL),
hasAlpha(true),
channels(CHANNELS),
bitsPerSample(BITS_PER_SAMPLE)
{
// Convert 00xAARRGGBB to RGBA bytewise (endian-independent) format
QImage tmp = img.convertToFormat(QImage::Format_ARGB32);
const uint32_t *data = reinterpret_cast<const uint32_t*>(tmp.bits());
unsigned int num_pixels = width * height;
image.resize(num_pixels * BYTES_PER_PIXEL);
for(unsigned int ptr = 0; ptr < num_pixels; ++ptr)
{
image[ptr*BYTES_PER_PIXEL+0] = data[ptr] >> 16; // R
image[ptr*BYTES_PER_PIXEL+1] = data[ptr] >> 8; // G
image[ptr*BYTES_PER_PIXEL+2] = data[ptr]; // B
image[ptr*BYTES_PER_PIXEL+3] = data[ptr] >> 24; // A
}
}
QDBusArgument &operator<<(QDBusArgument &a, const FreedesktopImage &i)
{
a.beginStructure();
a << i.width << i.height << i.stride << i.hasAlpha << i.bitsPerSample << i.channels << i.image;
a.endStructure();
return a;
}
const QDBusArgument &operator>>(const QDBusArgument &a, FreedesktopImage &i)
{
a.beginStructure();
a >> i.width >> i.height >> i.stride >> i.hasAlpha >> i.bitsPerSample >> i.channels >> i.image;
a.endStructure();
return a;
}
QVariant FreedesktopImage::toVariant(const QImage &img)
{
FreedesktopImage fimg(img);
return QVariant(qDBusRegisterMetaType<FreedesktopImage>(), &fimg);
}
void Notificator::notifyDBus(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
{
// https://developer.gnome.org/notification-spec/
// Arguments for DBus "Notify" call:
QList<QVariant> args;
// Program Name:
args.append(programName);
// Replaces ID; A value of 0 means that this notification won't replace any existing notifications:
args.append(0U);
// Application Icon, empty string
args.append(QString());
// Summary
args.append(title);
// Body
args.append(text);
// Actions (none, actions are deprecated)
QStringList actions;
args.append(actions);
// Hints
QVariantMap hints;
// If no icon specified, set icon based on class
QIcon tmpicon;
if(icon.isNull())
{
QStyle::StandardPixmap sicon = QStyle::SP_MessageBoxQuestion;
switch(cls)
{
case Information: sicon = QStyle::SP_MessageBoxInformation; break;
case Warning: sicon = QStyle::SP_MessageBoxWarning; break;
case Critical: sicon = QStyle::SP_MessageBoxCritical; break;
default: break;
}
tmpicon = QApplication::style()->standardIcon(sicon);
}
else
{
tmpicon = icon;
}
hints["icon_data"] = FreedesktopImage::toVariant(tmpicon.pixmap(FREEDESKTOP_NOTIFICATION_ICON_SIZE).toImage());
args.append(hints);
// Timeout (in msec)
args.append(millisTimeout);
// "Fire and forget"
interface->callWithArgumentList(QDBus::NoBlock, "Notify", args);
}
#endif
void Notificator::notifySystray(Class cls, const QString &title, const QString &text, int millisTimeout)
{
QSystemTrayIcon::MessageIcon sicon = QSystemTrayIcon::NoIcon;
switch(cls) // Set icon based on class
{
case Information: sicon = QSystemTrayIcon::Information; break;
case Warning: sicon = QSystemTrayIcon::Warning; break;
case Critical: sicon = QSystemTrayIcon::Critical; break;
}
trayIcon->showMessage(title, text, sicon, millisTimeout);
}
#ifdef Q_OS_MACOS
void Notificator::notifyMacUserNotificationCenter(const QString &title, const QString &text)
{
// icon is not supported by the user notification center yet. OSX will use the app icon.
MacNotificationHandler::instance()->showNotification(title, text);
}
#endif
void Notificator::notify(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
{
switch(mode)
{
#ifdef USE_DBUS
case Freedesktop:
notifyDBus(cls, title, text, icon, millisTimeout);
break;
#endif
case QSystemTray:
notifySystray(cls, title, text, millisTimeout);
break;
#ifdef Q_OS_MACOS
case UserNotificationCenter:
notifyMacUserNotificationCenter(title, text);
break;
#endif
default:
if(cls == Critical)
{
// Fall back to old fashioned pop-up dialog if critical and no other notification available
QMessageBox::critical(parent, title, text, QMessageBox::Ok, QMessageBox::Ok);
}
break;
}
}
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