Fix polish issue in quick text edit

The text edit didn't polish even after there is change in position
offset, leading to alignment issues.

During geometry change, the QQuickTextEdit calculates implicit size
and base position offset, and then further requests a polish
immediately afterwards. This sequence of update happens only if we have
valid width or height set for text edit control. But in case we set
width or height to undefined, there is a chance that this update
would be missed.

This patch removes the checking of widthValid() in
QQuickTextEdit::geometryChange(), to allow those updates.
The validation of width or height is already handled internally
within updateSize(), so it shouldn't create an issue; and we still
try to avoid emitting cursorRectangleChanged() too often.

Amends 1770fa632f

Task-number: QTBUG-117667
Task-number: QTBUG-25489
Pick-to: 6.6 6.5
Change-Id: Ia20cd06e78842f5edb0c395d6322a660f86f6b5e
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
(cherry picked from commit d84c130411)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/quick/items/qquicktextedit.cpp

@@ -1555,14 +1555,14 @@ void QQuickTextEdit::setInputMethodHints(Qt::InputMethodHints hints)
 void QQuickTextEdit::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
 {
     Q_D(QQuickTextEdit);
-    if (!d->inLayout && ((newGeometry.width() != oldGeometry.width() && widthValid())
-        || (newGeometry.height() != oldGeometry.height() && heightValid()))) {
+    if (!d->inLayout && ((newGeometry.width() != oldGeometry.width())
+                         || (newGeometry.height() != oldGeometry.height()))) {
         updateSize();
         updateWholeDocument();
-        moveCursorDelegate();
+        if (widthValid() || heightValid())
+            moveCursorDelegate();
     }
     QQuickImplicitSizeItem::geometryChange(newGeometry, oldGeometry);
-
 }
 
 /*!

tests/auto/quick/qquicktextedit/data/resizeTextEditPolish.qml

@@ -0,0 +1,42 @@
+import QtQuick
+import QtQuick.Controls
+
+Item {
+    width: 400
+    height: 150
+
+    TextEdit {
+        id: textEdit
+        anchors {
+            top: parent.top
+            left: parent.left
+            right: parent.right
+        }
+        readOnly: true
+        wrapMode: Text.WordWrap
+        verticalAlignment: Text.AlignVCenter
+        text: "Lorem ipsum dolor sit amet, consectetur adipisicing"
+        states: [
+            State {
+                name: "multi-line"
+                when: textEdit.lineCount > 1
+                AnchorChanges {
+                    target: textEdit
+                    anchors.bottom: undefined
+                }
+                PropertyChanges {
+                    target: textEdit
+                    height: undefined
+                }
+            },
+            State {
+                name: "single-line"
+                when: true
+                AnchorChanges {
+                    target: textEdit
+                    anchors.bottom: { return textEdit.parent.bottom }
+                }
+            }
+        ]
+    }
+}

tests/auto/quick/qquicktextedit/tst_qquicktextedit.cpp

@@ -6,6 +6,7 @@
 #include <math.h>
 #include <QFile>
 #include <QtQuick/QQuickTextDocument>
+#include <QtQuickTest/QtQuickTest>
 #include <QTextDocument>
 #include <QtQml/qqmlengine.h>
 #include <QtQml/qqmlcontext.h>
@@ -227,6 +228,7 @@ private slots:
     void rtlAlignmentInColumnLayout_QTBUG_112858();
 
     void fontManipulationWithCursorSelection();
+    void resizeTextEditPolish();
 
 private:
     void simulateKeys(QWindow *window, const QList<Key> &keys);
@@ -6665,6 +6667,35 @@ void tst_qquicktextedit::fontManipulationWithCursorSelection()
         QCOMPARE(block.charFormat().font(), font);
 }
 
+void tst_qquicktextedit::resizeTextEditPolish()
+{
+    QQuickView window(testFileUrl("resizeTextEditPolish.qml"));
+    QVERIFY(window.rootObject() != nullptr);
+
+    window.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    auto *edit = window.rootObject()->findChild<QQuickTextEdit *>();
+    QVERIFY(edit != nullptr);
+    QCOMPARE(edit->lineCount(), 1);
+
+    QSignalSpy spy(edit, SIGNAL(lineCountChanged()));
+
+    // Resize item and check for item polished
+    auto *item = edit->parentItem();
+    item->setWidth(item->width() - (item->width() / 2));
+
+    QVERIFY(QQuickTest::qIsPolishScheduled(edit));
+    QVERIFY(QQuickTest::qWaitForPolish(edit));
+
+    QTRY_COMPARE(spy.size(), 1);
+    QVERIFY(edit->lineCount() > 1);
+    QCOMPARE(edit->state(), QString("multi-line"));
+    auto *editPriv = QQuickTextEditPrivate::get(edit);
+    QCOMPARE(editPriv->xoff, 0);
+    QCOMPARE(editPriv->yoff, 0);
+}
+
 QT_END_NAMESPACE
 
 QTEST_MAIN(tst_qquicktextedit)