all/window: use global screeninfo pool for screen getter

src/core/proxywindow.cpp

@@ -13,6 +13,7 @@
 #include <qwindow.h>
 
 #include "generation.hpp"
+#include "qmlglobal.hpp"
 #include "qmlscreen.hpp"
 #include "region.hpp"
 #include "reload.hpp"
@@ -231,6 +232,8 @@ void ProxyWindowBase::setScreen(QuickshellScreenInfo* screen) {
 	}
 
 	auto* qscreen = screen == nullptr ? nullptr : screen->screen;
+	if (qscreen == this->mScreen) return;
+
 	if (qscreen != nullptr) {
 		QObject::connect(qscreen, &QObject::destroyed, this, &ProxyWindowBase::onScreenDestroyed);
 	}
@@ -257,10 +260,7 @@ QuickshellScreenInfo* ProxyWindowBase::screen() const {
 		qscreen = this->window->screen();
 	}
 
-	return new QuickshellScreenInfo(
-	    const_cast<ProxyWindowBase*>(this), // NOLINT
-	    qscreen
-	);
+	return QuickshellTracked::instance()->screenInfo(qscreen);
 }
 
 QColor ProxyWindowBase::color() const {

src/core/qmlglobal.cpp

@@ -11,6 +11,7 @@
 #include <qqmlcontext.h>
 #include <qqmlengine.h>
 #include <qqmllist.h>
+#include <qscreen.h>
 #include <qtenvironmentvariables.h>
 #include <qtmetamacros.h>
 #include <qtypes.h>
@@ -73,6 +74,14 @@ QuickshellTracked::QuickshellTracked() {
 	}
 }
 
+QuickshellScreenInfo* QuickshellTracked::screenInfo(QScreen* screen) const {
+	for (auto* info: this->screens) {
+		if (info->screen == screen) return info;
+	}
+
+	return nullptr;
+}
+
 QuickshellTracked* QuickshellTracked::instance() {
 	static QuickshellTracked* instance = nullptr; // NOLINT
 	if (instance == nullptr) {

src/core/qmlglobal.hpp

@@ -6,6 +6,7 @@
 #include <qqmlengine.h>
 #include <qqmlintegration.h>
 #include <qqmllist.h>
+#include <qscreen.h>
 #include <qtmetamacros.h>
 #include <qtypes.h>
 #include <qvariant.h>
@@ -60,6 +61,7 @@ public:
 	QuickshellTracked();
 
 	QVector<QuickshellScreenInfo*> screens;
+	QuickshellScreenInfo* screenInfo(QScreen* screen) const;
 
 	static QuickshellTracked* instance();
 

src/wayland/session_lock.cpp

@@ -14,6 +14,7 @@
 #include <qtmetamacros.h>
 #include <qtypes.h>
 
+#include "../core/qmlglobal.hpp"
 #include "../core/qmlscreen.hpp"
 #include "../core/reload.hpp"
 #include "session_lock/session_lock.hpp"
@@ -243,10 +244,7 @@ QuickshellScreenInfo* WlSessionLockSurface::screen() const {
 		qscreen = this->window->screen();
 	}
 
-	return new QuickshellScreenInfo(
-	    const_cast<WlSessionLockSurface*>(this), // NOLINT
-	    qscreen
-	);
+	return QuickshellTracked::instance()->screenInfo(qscreen);
 }
 
 void WlSessionLockSurface::setScreen(QScreen* qscreen) {