qmllint: Exclude children of custom parser elements from warnings

Some warnings caused by the children of custom parser elements also need to be ignored.

Change-Id: Iff3c6e5ce2ea334c6de7a14c8592ee1ebf80bb58
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/qmlcompiler/qqmljsimportvisitor.cpp

@@ -861,8 +861,12 @@ void QQmlJSImportVisitor::endVisit(QQmlJS::AST::UiObjectBinding *uiob)
     const QString propertyName = group->name.toString();
 
     QQmlJSMetaProperty property = m_currentScope->property(propertyName);
-    if (property.isValid() && !property.type().isNull()
+
-        && (uiob->hasOnToken || property.type()->canAssign(childScope))) {
+    if (m_currentScope->isInCustomParserParent()) {
+        // These warnings do not apply for custom parsers and their children and need to be handled
+        // on a case by case basis
+    } else if (property.isValid() && !property.type().isNull()
+               && (uiob->hasOnToken || property.type()->canAssign(childScope))) {
 
         QQmlJSMetaPropertyBinding binding = m_currentScope->hasOwnPropertyBinding(propertyName)
                 ? m_currentScope->ownPropertyBinding(propertyName)

src/qmlcompiler/qqmljsscope.cpp

@@ -493,4 +493,14 @@ bool QQmlJSScope::canAssign(const QQmlJSScope::ConstPtr &derived) const
     return internalName() == u"QVariant"_qs || internalName() == u"QJSValue"_qs;
 }
 
+bool QQmlJSScope::isInCustomParserParent() const
+{
+    for (const auto *scope = this; scope; scope = scope->parentScope().get()) {
+        if (!scope->baseType().isNull() && scope->baseType()->hasCustomParser())
+            return true;
+    }
+
+    return false;
+}
+
 QT_END_NAMESPACE

src/qmlcompiler/qqmljsscope_p.h

@@ -355,6 +355,12 @@ public:
     */
     bool canAssign(const QQmlJSScope::ConstPtr &derived) const;
 
+    /*!
+      \internal
+      Checks whether this type or its parents have a custom parser.
+    */
+    bool isInCustomParserParent() const;
+
 private:
     QQmlJSScope(ScopeType type, const QQmlJSScope::Ptr &parentScope = QQmlJSScope::Ptr());
 

tests/auto/qml/qmllint/data/customParser.recursive.qml

@@ -0,0 +1,16 @@
+import QtQuick 2.0
+
+ListModel {
+    id: listModel
+    ListElement { dataType: "rect"; color: "green"; font.color: "red"; ListElement {} Behavior on FooBar {} }
+    ListElement { dataType: "image"; source: "../shared/images/qt-logo.png" }
+    ListElement { dataType: "rect"; color: "green" }
+    ListElement { dataType: "image"; source: "../shared/images/qt-logo.png" }
+    ListElement { dataType: "rect"; color: "blue" }
+    ListElement { dataType: "rect"; color: "blue" }
+    ListElement { dataType: "rect"; color: "blue" }
+    ListElement { dataType: "rect"; color: "blue" }
+    ListElement { dataType: "rect"; color: "blue" }
+    ListElement { dataType: "rect"; color: "blue" }
+}
+

tests/auto/qml/qmllint/tst_qmllint.cpp

@@ -738,6 +738,7 @@ void TestQmllint::cleanQmlCode_data()
     QTest::newRow("propertyOverride") << QStringLiteral("propertyOverride.qml");
     QTest::newRow("propertyBindingValue") << QStringLiteral("propertyBindingValue.qml");
     QTest::newRow("customParser") << QStringLiteral("customParser.qml");
+    QTest::newRow("customParser.recursive") << QStringLiteral("customParser.recursive.qml");
     QTest::newRow("2Behavior") << QStringLiteral("2behavior.qml");
     QTest::newRow("interceptor") << QStringLiteral("interceptor.qml");
     QTest::newRow("valueSource") << QStringLiteral("valueSource.qml");

tools/qmllint/findwarnings.cpp

@@ -99,6 +99,11 @@ void FindWarningVisitor::checkInheritanceCycle(QQmlJSScope::ConstPtr scope)
 
 void FindWarningVisitor::checkGroupedAndAttachedScopes(QQmlJSScope::ConstPtr scope)
 {
+    // These warnings do not apply for custom parsers and their children and need to be handled on a
+    // case by case basis
+    if (scope->isInCustomParserParent())
+        return;
+
     auto children = scope->childScopes();
     while (!children.isEmpty()) {
         auto childScope = children.takeFirst();
@@ -142,6 +147,11 @@ void FindWarningVisitor::checkDefaultProperty(const QQmlJSScope::ConstPtr &scope
     if (scope == m_exportedRootScope || scope->isArrayScope()) // inapplicable
         return;
 
+    // These warnings do not apply for custom parsers and their children and need to be handled on a
+    // case by case basis
+    if (scope->isInCustomParserParent())
+        return;
+
     const QQmlJSScope *scopeOfDefaultProperty = nullptr;
     QString defaultPropertyName;
     // NB: start looking for default property in parent scope (because this
@@ -288,9 +298,10 @@ bool FindWarningVisitor::visit(QQmlJS::AST::UiScriptBinding *uisb)
         }
 
         if (!qmlScope->hasProperty(name.toString())) {
-            // These warnings do not apply for custom parsers and need to be handled on a case by
+            // These warnings do not apply for custom parsers and their children and need to be
-            // case basis
+            // handled on a case by case basis
-            if (qmlScope->baseType()->hasCustomParser())
+
+            if (qmlScope->isInCustomParserParent())
                 return true;
 
             // TODO: Can this be in a better suited category?