Merge branch 'port-d'

# Conflicts:
#	AGENTS.md

tests/ResizeSnapCanvasTests.cpp

@@ -1,48 +1,11 @@
-#include "CanvasFixtures.h"
+#include "MovePressFixtures.h"
 
 // Swift's resize snapping on the canvas: handles, Ctrl, Shift.
-namespace {
-// The document fills the canvas: view points are pixels.
-struct Canvas : Shown {
-    QUuid red;
-    Canvas() : Shown(QSize(400, 300), QSize(400, 300))
-    {
-        settle();
-        session.zoom(1);
-        session.insert(filled(100, 100, qRgba(255, 0, 0, 255), "Red"));
-        red = session.activeLayerID().value();
-        session.selectTool(NavigationTool::move);
-        canvas->synchronizeDisplay();
-        if (session.viewport.viewPoint(QPointF(0, 0), documentSize()) != QPointF(0, 0))
-            throw std::runtime_error("the document does not fill the canvas");
-    }
-    QPointF origin() const { return layerWith(session, red).transform.origin; }
-    void press(QPointF at, Qt::KeyboardModifiers modifiers = Qt::NoModifier) { QTest::mousePress(canvas, Qt::LeftButton, modifiers, at.toPoint()); }
-    void move(QPointF to, Qt::KeyboardModifiers modifiers = Qt::NoModifier)
-    {
-        QMouseEvent event(QEvent::MouseMove, to, to, canvas->mapToGlobal(to.toPoint()), Qt::NoButton, Qt::LeftButton, modifiers);
-        QApplication::sendEvent(canvas, &event);
-    }
-    void release(QPointF at, Qt::KeyboardModifiers modifiers = Qt::NoModifier) { QTest::mouseRelease(canvas, Qt::LeftButton, modifiers, at.toPoint()); }
-    void drag(QPointF from, QPointF to, Qt::KeyboardModifiers modifiers = Qt::NoModifier)
-    {
-        press(from, modifiers);
-        move((from + to) / 2, modifiers);
-        move(to, modifiers);
-        release(to, modifiers);
-    }
-    void click(QPointF at, Qt::KeyboardModifiers modifiers = Qt::NoModifier)
-    {
-        press(at, modifiers);
-        release(at, modifiers);
-    }
-};
-}
-
 class ResizeSnapCanvasTests : public QObject {
     Q_OBJECT
 private slots:
     void resizedEdgesSnapUnlessCtrl();
+    void altResizesFromTheCentreAndSnaps();
 };
 
 void ResizeSnapCanvasTests::resizedEdgesSnapUnlessCtrl()
@@ -81,5 +44,21 @@ void ResizeSnapCanvasTests::resizedEdgesSnapUnlessCtrl()
     shown.release(QPointF(397, 349));
 }
 
+// Swift's "resizing from the center with Option snaps too".
+void ResizeSnapCanvasTests::altResizesFromTheCentreAndSnaps()
+{
+    Canvas shown;
+    EditorSession &session = shown.session;
+    session.setLocksTransformRatio(false);
+    // Right edge to 396, left to 4: 396 snaps.
+    shown.press(QPointF(250, 150), Qt::AltModifier);
+    shown.move(QPointF(396, 150), Qt::AltModifier);
+    QCOMPARE(session.transformEdit().value().draft, (LayerTransform{.origin = {0, 100}, .size = {400, 100}}));
+    QCOMPARE(session.snapGuides, (SnapGuides{{400}, {}}));
+    shown.release(QPointF(396, 150), Qt::AltModifier);
+    QCOMPARE(layerWith(session, shown.red).transform, (LayerTransform{.origin = {0, 100}, .size = {400, 100}}));
+    QCOMPARE(int(session.document().value().layers.size()), 1);
+}
+
 QTEST_MAIN(ResizeSnapCanvasTests)
 #include "ResizeSnapCanvasTests.moc"