qmllint: Resolve aliases in nested objects

So far we've just ignored them.

Change-Id: I2ca522ef825a341a3f4bf1c2a42fb0376180cdda
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

src/qmlcompiler/qqmljsimportvisitor.cpp

@@ -30,6 +30,7 @@
 
 #include <QtCore/qfileinfo.h>
 #include <QtCore/qdir.h>
+#include <QtCore/qqueue.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -60,32 +61,33 @@ void QQmlJSImportVisitor::leaveEnvironment()
     m_currentScope = m_currentScope->parentScope();
 }
 
+void QQmlJSImportVisitor::resolveAliases()
+{
+    QQueue<QQmlJSScope::Ptr> objects;
+    objects.enqueue(m_qmlRootScope);
+
+    while (!objects.isEmpty()) {
+        const QQmlJSScope::Ptr object = objects.dequeue();
+        const auto properties = object->properties();
+        for (auto property : properties) {
+            if (!property.isAlias())
+                continue;
+            const auto it = m_scopesById.find(property.typeName());
+            if (it != m_scopesById.end()) {
+                property.setType(QQmlJSScope::ConstPtr(*it));
+                object->addProperty(property);
+            }
+        }
+
+        const auto childScopes = object->childScopes();
+        for (const auto &childScope : childScopes)
+            objects.enqueue(childScope);
+    }
+}
+
 QQmlJSScope::Ptr QQmlJSImportVisitor::result() const
 {
-    QQmlJSScope::Ptr result = QQmlJSScope::create();
-    result->setIsComposite(true);
-    result->setBaseTypeName(m_qmlRootScope->baseTypeName());
-    const auto properties = m_qmlRootScope->properties();
-    for (auto property : properties) {
-        if (property.isAlias()) {
-            const auto it = m_scopesById.find(property.typeName());
-            if (it != m_scopesById.end())
-                property.setType(QQmlJSScope::ConstPtr(*it));
-            result->addProperty(property);
-        } else {
-            result->addProperty(property);
-        }
-    }
-
-    for (const auto &method : m_qmlRootScope->methods())
-        result->addMethod(method);
-
-    for (const auto &enumerator : m_qmlRootScope->enums())
-        result->addEnum(enumerator);
-
-    result->resolveTypes(m_rootScopeImports);
-    result->setSourceLocation(m_qmlRootScope->sourceLocation());
-    return result;
+    return m_qmlRootScope;
 }
 
 void QQmlJSImportVisitor::importExportedNames(QQmlJSScope::ConstPtr scope)
@@ -126,6 +128,11 @@ bool QQmlJSImportVisitor::visit(QQmlJS::AST::UiProgram *)
     return true;
 }
 
+void QQmlJSImportVisitor::endVisit(UiProgram *)
+{
+    resolveAliases();
+}
+
 bool QQmlJSImportVisitor::visit(UiObjectDefinition *definition)
 {
     QString superType;

src/qmlcompiler/qqmljsimportvisitor_p.h

@@ -59,6 +59,7 @@ public:
 
 protected:
     bool visit(QQmlJS::AST::UiProgram *) override;
+    void endVisit(QQmlJS::AST::UiProgram *) override;
     bool visit(QQmlJS::AST::UiObjectDefinition *) override;
     void endVisit(QQmlJS::AST::UiObjectDefinition *) override;
     bool visit(QQmlJS::AST::UiPublicMember *) override;
@@ -97,7 +98,7 @@ protected:
     QString m_implicitImportDirectory;
     QStringList m_qmltypesFiles;
     QQmlJSScope::Ptr m_currentScope;
-    QQmlJSScope::ConstPtr m_qmlRootScope;
+    QQmlJSScope::Ptr m_qmlRootScope;
     QQmlJSScope::ConstPtr m_globalScope;
     QHash<QString, QQmlJSScope::ConstPtr> m_scopesById;
     QHash<QString, QQmlJSScope::ConstPtr> m_rootScopeImports;
@@ -110,6 +111,7 @@ protected:
     void leaveEnvironment();
 
 private:
+    void resolveAliases();
     void visitFunctionExpressionHelper(QQmlJS::AST::FunctionExpression *fexpr);
     void importExportedNames(QQmlJSScope::ConstPtr scope);
 };

tests/auto/qml/qmllint/data/badAliasObject.qml

@@ -0,0 +1,10 @@
+import QtQuick
+
+Item {
+    Item {
+        QtObject { id: inner }
+
+        property alias innerObj: inner
+        property string name: innerObj.wrongwrongwrong
+    }
+}

tests/auto/qml/qmllint/data/goodAliasObject.qml

@@ -0,0 +1,10 @@
+import QtQuick
+
+Item {
+    Item {
+        QtObject { id: inner }
+
+        property alias innerObj: inner
+        property string name: innerObj.objectName
+    }
+}

tests/auto/qml/qmllint/tst_qmllint.cpp

@@ -228,6 +228,10 @@ void TestQmllint::dirtyQmlCode_data()
             << QStringLiteral("nanchors3.qml")
             << QString()
             << QString();
+    QTest::newRow("badAliasObject")
+            << QStringLiteral("badAliasObject.qml")
+            << QString("Warning: Property \"wrongwrongwrong\" not found on type \"QtObject\"")
+            << QString();
 }
 
 void TestQmllint::dirtyQmlCode()
@@ -287,6 +291,7 @@ void TestQmllint::cleanQmlCode_data()
     QTest::newRow("anchors1") << QStringLiteral("anchors1.qml");
     QTest::newRow("anchors2") << QStringLiteral("anchors2.qml");
     QTest::newRow("optionalImport") << QStringLiteral("optionalImport.qml");
+    QTest::newRow("goodAliasObject") << QStringLiteral("goodAliasObject.qml");
 }
 
 void TestQmllint::cleanQmlCode()