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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "desktop_screen_qt.h"
#include "ui/display/display.h"
#include "type_conversion.h"
#include <QGuiApplication>
#include <QScreen>
#if defined(USE_OZONE)
#include "ui/ozone/buildflags.h"
#if BUILDFLAG(OZONE_PLATFORM_X11)
#define USE_XSCREENSAVER
#include "ui/base/x/x11_screensaver.h"
#include "ui/base/x/x11_util.h"
#endif
#endif
#include <cmath>
namespace QtWebEngineCore {
static display::Display::Rotation toDisplayRotation(Qt::ScreenOrientation orientation)
{
switch (orientation) {
case Qt::PrimaryOrientation:
case Qt::LandscapeOrientation:
return display::Display::ROTATE_0;
case Qt::PortraitOrientation:
return display::Display::ROTATE_90;
case Qt::InvertedLandscapeOrientation:
return display::Display::ROTATE_180;
case Qt::InvertedPortraitOrientation:
return display::Display::ROTATE_270;
}
}
display::Display toDisplayDisplay(int id, const QScreen *screen)
{
auto display = display::Display(id, toGfx(screen->geometry()));
display.set_work_area(toGfx(screen->availableGeometry()));
display.set_is_monochrome(screen->depth() == 1);
display.set_color_depth(screen->depth());
display.set_depth_per_component(8); // FIXME: find the real value
display.set_display_frequency(std::ceil(screen->refreshRate()));
display.set_rotation(toDisplayRotation(screen->orientation()));
// FIXME: support lower scale factor
float pixelRatio = screen->devicePixelRatio();
if (pixelRatio < 1) {
qWarning("Unsupported scale factor (%f) detected on Display%d", pixelRatio, id);
display.set_device_scale_factor(qGuiApp->devicePixelRatio());
} else {
display.set_device_scale_factor(pixelRatio);
}
if (screen->nativeOrientation() != Qt::PrimaryOrientation)
display.set_panel_rotation(toDisplayRotation(screen->nativeOrientation()));
return display;
}
DesktopScreenQt::DesktopScreenQt()
{
initializeScreens();
}
DesktopScreenQt::~DesktopScreenQt()
{
for (auto conn : std::as_const(m_connections))
QObject::disconnect(conn);
}
void DesktopScreenQt::initializeScreens()
{
if (updateAllScreens()) {
m_connections[0] =
QObject::connect(qApp, &QGuiApplication::primaryScreenChanged, [this] (QScreen *screen) {
ProcessDisplayChanged(toDisplayDisplay(0, screen), true /* is_primary */);
});
// no guarantees how these will affect ids:
m_connections[1] =
QObject::connect(qApp, &QGuiApplication::screenAdded, [this] (QScreen *) {
updateAllScreens();
});
m_connections[2] =
QObject::connect(qApp, &QGuiApplication::screenRemoved, [this] (QScreen *) {
updateAllScreens();
});
} else {
// Running headless
ProcessDisplayChanged(display::Display::GetDefaultDisplay(), true /* is_primary */);
m_connections[0] =
QObject::connect(qApp, &QGuiApplication::screenAdded, [this] (QScreen *) {
display_list().RemoveDisplay(display::kDefaultDisplayId);
QObject::disconnect(m_connections[0]);
initializeScreens();
});
}
}
bool DesktopScreenQt::updateAllScreens()
{
Q_ASSERT(qApp->primaryScreen() == qApp->screens().first());
const auto screens = qApp->screens();
const int oldLen = GetNumDisplays();
for (int i = screens.length(); i < oldLen; ++i)
display_list().RemoveDisplay(i);
for (int i = 0; i < screens.length(); ++i)
ProcessDisplayChanged(toDisplayDisplay(i, screens.at(i)), i == 0 /* is_primary */);
return screens.length() > 0;
}
display::Display DesktopScreenQt::GetDisplayNearestWindow(gfx::NativeWindow /*window*/) const
{
return GetPrimaryDisplay();
}
#if defined(USE_XSCREENSAVER)
class XScreenSuspender : public display::Screen::ScreenSaverSuspender
{
public:
XScreenSuspender()
{
ui::SuspendX11ScreenSaver(true);
}
~XScreenSuspender() override
{
ui::SuspendX11ScreenSaver(false);
}
};
#endif
#if BUILDFLAG(IS_CHROMEOS_LACROS) || BUILDFLAG(IS_LINUX)
std::unique_ptr<display::Screen::ScreenSaverSuspender> DesktopScreenQt::SuspendScreenSaver()
{
#if defined(USE_XSCREENSAVER)
return std::make_unique<XScreenSuspender>();
#else
return nullptr;
#endif
}
#endif
bool DesktopScreenQt::IsScreenSaverActive() const
{
#if defined(USE_XSCREENSAVER)
return ui::IsXScreensaverActive();
#else
return false;
#endif
}
} // namespace QtWebEngineCore
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