all: refactor windows code out of core

There are still some links from core to window but its now separate
enough to fix PanelWindow in qml tooling.

src/window/test/CMakeLists.txt

@@ -0,0 +1,7 @@
+function (qs_test name)
+	add_executable(${name} ${ARGN})
+	target_link_libraries(${name} PRIVATE ${QT_DEPS} Qt6::Test quickshell-window quickshell-core)
+	add_test(NAME ${name} WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}" COMMAND $<TARGET_FILE:${name}>)
+endfunction()
+
+qs_test(popupwindow popupwindow.cpp)

src/window/test/popupwindow.cpp

@@ -0,0 +1,180 @@
+#include "popupwindow.hpp"
+
+#include <qquickwindow.h>
+#include <qsignalspy.h>
+#include <qtest.h>
+#include <qtestcase.h>
+#include <qwindow.h>
+
+#include "../popupwindow.hpp"
+#include "../proxywindow.hpp"
+
+void TestPopupWindow::initiallyVisible() { // NOLINT
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setParentWindow(&parent);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	QVERIFY(popup.isVisible());
+	QVERIFY(popup.backingWindow()->isVisible());
+	QCOMPARE(popup.backingWindow()->transientParent(), parent.backingWindow());
+}
+
+void TestPopupWindow::reloadReparent() { // NOLINT
+	// first generation
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	auto* win2 = new QQuickWindow();
+	win2->setVisible(true);
+
+	parent.setVisible(true);
+	popup.setParentWindow(&parent);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	// second generation
+	auto newParent = ProxyWindowBase();
+	auto newPopup = ProxyPopupWindow();
+
+	newPopup.setParentWindow(&newParent);
+	newPopup.setVisible(true);
+
+	auto* oldWindow = popup.backingWindow();
+	auto* oldTransientParent = oldWindow->transientParent();
+
+	auto spy = QSignalSpy(oldWindow, &QWindow::visibleChanged);
+
+	newParent.reload(&parent);
+	newPopup.reload(&popup);
+
+	QVERIFY(newPopup.isVisible());
+	QVERIFY(newPopup.backingWindow()->isVisible());
+	QCOMPARE(newPopup.backingWindow()->transientParent(), oldTransientParent);
+	QCOMPARE(newPopup.backingWindow()->transientParent(), newParent.backingWindow());
+	QCOMPARE(spy.length(), 0);
+}
+
+void TestPopupWindow::reloadUnparent() { // NOLINT
+	// first generation
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setParentWindow(&parent);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	// second generation
+	auto newPopup = ProxyPopupWindow();
+
+	// parent not set
+	newPopup.setVisible(true);
+	newPopup.reload(&popup);
+
+	QVERIFY(!newPopup.isVisible());
+	QVERIFY(!newPopup.backingWindow()->isVisible());
+	QCOMPARE(newPopup.backingWindow()->transientParent(), nullptr);
+}
+
+void TestPopupWindow::invisibleWithoutParent() { // NOLINT
+	auto popup = ProxyPopupWindow();
+
+	popup.setVisible(true);
+	popup.reload();
+
+	QVERIFY(!popup.isVisible());
+}
+
+void TestPopupWindow::moveWithParent() { // NOLINT
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setParentWindow(&parent);
+	popup.setRelativeX(10);
+	popup.setRelativeY(10);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	QCOMPARE(popup.x(), parent.x() + 10);
+	QCOMPARE(popup.y(), parent.y() + 10);
+
+	parent.backingWindow()->setX(10);
+	parent.backingWindow()->setY(10);
+
+	QCOMPARE(popup.x(), parent.x() + 10);
+	QCOMPARE(popup.y(), parent.y() + 10);
+}
+
+void TestPopupWindow::attachParentLate() { // NOLINT
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	QVERIFY(!popup.isVisible());
+
+	popup.setParentWindow(&parent);
+	QVERIFY(popup.isVisible());
+	QVERIFY(popup.backingWindow()->isVisible());
+	QCOMPARE(popup.backingWindow()->transientParent(), parent.backingWindow());
+}
+
+void TestPopupWindow::reparentLate() { // NOLINT
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setParentWindow(&parent);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	QCOMPARE(popup.x(), parent.x());
+	QCOMPARE(popup.y(), parent.y());
+
+	auto parent2 = ProxyWindowBase();
+	parent2.reload();
+
+	parent2.backingWindow()->setX(10);
+	parent2.backingWindow()->setY(10);
+
+	popup.setParentWindow(&parent2);
+	QVERIFY(popup.isVisible());
+	QVERIFY(popup.backingWindow()->isVisible());
+	QCOMPARE(popup.backingWindow()->transientParent(), parent2.backingWindow());
+	QCOMPARE(popup.x(), parent2.x());
+	QCOMPARE(popup.y(), parent2.y());
+}
+
+void TestPopupWindow::xMigrationFix() { // NOLINT
+	auto parent = ProxyWindowBase();
+	auto popup = ProxyPopupWindow();
+
+	popup.setParentWindow(&parent);
+	popup.setVisible(true);
+
+	parent.reload();
+	popup.reload();
+
+	QCOMPARE(popup.x(), parent.x());
+
+	popup.setVisible(false);
+	popup.setVisible(true);
+
+	QCOMPARE(popup.x(), parent.x());
+}
+
+QTEST_MAIN(TestPopupWindow);

src/window/test/popupwindow.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <qobject.h>
+#include <qtmetamacros.h>
+
+class TestPopupWindow: public QObject {
+	Q_OBJECT;
+
+private slots:
+	void initiallyVisible();
+	void reloadReparent();
+	void reloadUnparent();
+	void invisibleWithoutParent();
+	void moveWithParent();
+	void attachParentLate();
+	void reparentLate();
+	void xMigrationFix();
+};