core/transformwatcher: add TransformWatcher

src/core/test/CMakeLists.txt

@@ -5,3 +5,4 @@ function (qs_test name)
 endfunction()
 
 qs_test(popupwindow popupwindow.cpp)
+qs_test(transformwatcher transformwatcher.cpp)

src/core/test/transformwatcher.cpp

@@ -0,0 +1,105 @@
+#include "transformwatcher.hpp"
+
+#include <qlist.h>
+#include <qquickitem.h>
+#include <qquickwindow.h>
+#include <qtest.h>
+#include <qtestcase.h>
+
+#include "../transformwatcher.hpp"
+
+void TestTransformWatcher::aParentOfB() { // NOLINT
+	auto a = QQuickItem();
+	a.setObjectName("a");
+	auto b = QQuickItem();
+	b.setObjectName("b");
+	b.setParentItem(&a);
+
+	auto watcher = TransformWatcher();
+	watcher.setA(&a);
+	watcher.setB(&b);
+
+	QCOMPARE(watcher.parentChain, {&a});
+	QCOMPARE(watcher.childChain, {&b});
+}
+
+void TestTransformWatcher::bParentOfA() { // NOLINT
+	auto a = QQuickItem();
+	a.setObjectName("a");
+	auto b = QQuickItem();
+	b.setObjectName("b");
+	a.setParentItem(&b);
+
+	auto watcher = TransformWatcher();
+	watcher.setA(&a);
+	watcher.setB(&b);
+
+	QCOMPARE(watcher.parentChain, (QList {&a, &b}));
+	QCOMPARE(watcher.childChain, {});
+}
+
+// a
+//  p1    b
+//   p2 c1
+//    p3
+void TestTransformWatcher::aParentChainB() { // NOLINT
+	auto a = QQuickItem();
+	a.setObjectName("a");
+	auto b = QQuickItem();
+	b.setObjectName("b");
+
+	auto p1 = QQuickItem();
+	p1.setObjectName("p1");
+	auto p2 = QQuickItem();
+	p2.setObjectName("p2");
+	auto p3 = QQuickItem();
+	p3.setObjectName("p3");
+	auto c1 = QQuickItem();
+	c1.setObjectName("c1");
+
+	a.setParentItem(&p1);
+	p1.setParentItem(&p2);
+	p2.setParentItem(&p3);
+
+	b.setParentItem(&c1);
+	c1.setParentItem(&p3);
+
+	auto watcher = TransformWatcher();
+	watcher.setA(&a);
+	watcher.setB(&b);
+
+	QCOMPARE(watcher.parentChain, (QList {&a, &p1, &p2, &p3}));
+	QCOMPARE(watcher.childChain, (QList {&b, &c1}));
+}
+
+void TestTransformWatcher::multiWindow() { // NOLINT
+	auto a = QQuickItem();
+	a.setObjectName("a");
+	auto b = QQuickItem();
+	b.setObjectName("b");
+
+	auto p = QQuickItem();
+	p.setObjectName("p");
+	auto c = QQuickItem();
+	c.setObjectName("c");
+
+	a.setParentItem(&p);
+	b.setParentItem(&c);
+
+	auto aW = QQuickWindow();
+	auto bW = QQuickWindow();
+
+	p.setParentItem(aW.contentItem());
+	c.setParentItem(bW.contentItem());
+
+	auto watcher = TransformWatcher();
+	watcher.setA(&a);
+	watcher.setB(&b);
+
+	QCOMPARE(watcher.parentChain, (QList {&a, &p, aW.contentItem()}));
+	QCOMPARE(watcher.childChain, (QList {&b, &c, bW.contentItem()}));
+	QCOMPARE(watcher.parentWindow, &aW);
+	QCOMPARE(watcher.childWindow, &bW);
+}
+
+QTEST_MAIN(TestTransformWatcher);

src/core/test/transformwatcher.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <qobject.h>
+#include <qtmetamacros.h>
+
+class TestTransformWatcher: public QObject {
+	Q_OBJECT;
+
+private slots:
+	void aParentOfB();
+	void bParentOfA();
+	void aParentChainB();
+	void multiWindow();
+};