QmlJsEditor: navigate from QML code to C++ code

Fixes: QTCREATORBUG-28086
Change-Id: I00acfe49b8e74aa057cb59d8c951d477f8ad487e
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/libs/languageutils/fakemetaobject.cpp

@@ -269,6 +269,11 @@ QString FakeMetaObject::className() const
 void FakeMetaObject::setClassName(const QString &name)
 { m_className = name; }
 
+QString FakeMetaObject::filePath() const
+{ return m_filePath; }
+void FakeMetaObject::setFilePath(const QString &path)
+{ m_filePath = path; }
+
 void FakeMetaObject::addExport(const QString &name, const QString &package, ComponentVersion version)
 {
     Export exp;

src/libs/languageutils/fakemetaobject.h

@@ -139,6 +139,7 @@ public:
 
 private:
     QString m_className;
+    QString m_filePath;
     QList<Export> m_exports;
     QString m_superName;
     QList<FakeMetaEnum> m_enums;
@@ -160,6 +161,9 @@ public:
     QString className() const;
     void setClassName(const QString &name);
 
+    QString filePath() const;
+    void setFilePath(const QString &path);
+
     void addExport(const QString &name, const QString &package, ComponentVersion version);
     void setExportMetaObjectRevision(int exportIndex, int metaObjectRevision);
     const QList<Export> exports() const;

src/libs/qmljs/qmljsinterpreter.cpp

@@ -251,6 +251,14 @@ const CppComponentValue *CppComponentValue::asCppComponentValue() const
     return this;
 }
 
+bool CppComponentValue::getSourceLocation(Utils::FilePath *fileName, int *line, int *column) const
+{
+    *fileName = Utils::FilePath::fromString(m_metaObject->filePath());
+    *line = 0;
+    *column = 0;
+    return true;
+}
+
 void CppComponentValue::processMembers(MemberProcessor *processor) const
 {
     // process the meta enums

src/libs/qmljs/qmljsinterpreter.h

@@ -573,6 +573,8 @@ public:
 
     const CppComponentValue *asCppComponentValue() const override;
 
+    bool getSourceLocation(Utils::FilePath *fileName, int *line, int *column) const override;
+
     void processMembers(MemberProcessor *processor) const override;
     const Value *valueForCppName(const QString &typeName) const;
 

src/libs/qmljs/qmljstypedescriptionreader.cpp

@@ -197,6 +197,8 @@ void TypeDescriptionReader::readComponent(UiObjectDefinition *ast)
             QString name = toString(script->qualifiedId);
             if (name == QLatin1String("name")) {
                 fmo->setClassName(readStringBinding(script));
+            } else if (name == QLatin1String("file")) {
+                fmo->setFilePath(readStringBinding(script));
             } else if (name == QLatin1String("prototype")) {
                 fmo->setSuperclassName(readStringBinding(script));
             } else if (name == QLatin1String("defaultProperty")) {

src/plugins/qmljseditor/qmljseditor.cpp

@@ -789,13 +789,18 @@ void QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
         return;
     }
 
+    const ProjectExplorer::Project * const project = ProjectExplorer::ProjectTree::currentProject();
+    ProjectExplorer::ProjectNode* projectRootNode = nullptr;
+    if (project) {
+        projectRootNode = project->rootProjectNode();
+    }
+
     // string literals that could refer to a file link to them
     if (auto literal = cast<const StringLiteral *>(node)) {
         const QString &text = literal->value.toString();
         if (text.startsWith("qrc:/")) {
-            const ProjectExplorer::Project * const project = ProjectExplorer::ProjectTree::currentProject();
-            if (project && project->rootProjectNode()) {
-                const ProjectExplorer::Node * const nodeForPath = project->rootProjectNode()->findNode(
+            if (projectRootNode) {
+                const ProjectExplorer::Node * const nodeForPath = projectRootNode->findNode(
                             [qrcPath = text.mid(text.indexOf(':') + 1)](ProjectExplorer::Node *n) {
                     if (!n->asFileNode())
                         return false;
@@ -854,14 +859,33 @@ void QmlJSEditorWidget::findLinkAt(const QTextCursor &cursor,
 
     if (auto q = AST::cast<const AST::UiQualifiedId *>(node)) {
         for (const AST::UiQualifiedId *tail = q; tail; tail = tail->next) {
-            if (! tail->next && cursorPosition <= tail->identifierToken.end()) {
+            if (tail->next || !(cursorPosition <= tail->identifierToken.end())) {
+                continue;
+            }
+
             link.linkTextStart = tail->identifierToken.begin();
             link.linkTextEnd = tail->identifierToken.end();
+
+            if (!value->asCppComponentValue() || !projectRootNode) {
                 processLinkCallback(link);
                 return;
             }
-        }
 
+            const ProjectExplorer::Node * const nodeForPath = projectRootNode->findNode(
+                [&fileName](ProjectExplorer::Node *n) {
+                    const auto fileNode = n->asFileNode();
+                    if (!fileNode)
+                        return false;
+                    Utils::FilePath filePath = n->filePath();
+                    return filePath.endsWith(fileName.toUserOutput());
+                });
+            if (nodeForPath) {
+                link.targetFilePath = nodeForPath->filePath();
+                processLinkCallback(link);
+                return;
+            }
+            // else we will process an empty link below to avoid an error dialog
+        }
     } else if (auto id = AST::cast<const AST::IdentifierExpression *>(node)) {
         link.linkTextStart = id->firstSourceLocation().begin();
         link.linkTextEnd = id->lastSourceLocation().end();