Revert "Project: Set QML/C++ languages where both are possible"

This reverts commit 75691393. Otherwise
we'd enable QML debugging for virtually all projects.

Change-Id: I5518624a9973a9f61fbef6c680b5a83c74d0b4a9
Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/autotoolsprojectmanager/autotoolsproject.cpp

@@ -79,9 +79,7 @@ AutotoolsProject::AutotoolsProject(AutotoolsManager *manager, const QString &fil
     m_makefileParserThread(0)
 {
     setProjectContext(Core::Context(Constants::PROJECT_CONTEXT));
-    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
-    pl.add(ProjectExplorer::Constants::LANG_QMLJS);
-    setProjectLanguages(pl);
+    setProjectLanguages(Core::Context(ProjectExplorer::Constants::LANG_CXX));
 
     const QFileInfo fileInfo(m_fileName);
     m_projectName = fileInfo.absoluteDir().dirName();

src/plugins/cmakeprojectmanager/cmakeproject.cpp

@@ -109,10 +109,7 @@ CMakeProject::CMakeProject(CMakeManager *manager, const QString &fileName)
       m_lastEditor(0)
 {
     setProjectContext(Core::Context(CMakeProjectManager::Constants::PROJECTCONTEXT));
-    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
-    pl.add(ProjectExplorer::Constants::LANG_QMLJS);
-    setProjectLanguages(pl);
-
+    setProjectLanguages(Core::Context(ProjectExplorer::Constants::LANG_CXX));
 
     m_file = new CMakeFile(this, fileName);
 

src/plugins/genericprojectmanager/genericproject.cpp

@@ -70,10 +70,7 @@ GenericProject::GenericProject(Manager *manager, const QString &fileName)
       m_fileName(fileName)
 {
     setProjectContext(Context(GenericProjectManager::Constants::PROJECTCONTEXT));
-    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
-    pl.add(ProjectExplorer::Constants::LANG_QMLJS);
-    setProjectLanguages(pl);
-
+    setProjectLanguages(Context(ProjectExplorer::Constants::LANG_CXX));
 
     QFileInfo fileInfo(m_fileName);
     QDir dir = fileInfo.dir();

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -106,10 +106,7 @@ QbsProject::QbsProject(QbsManager *manager, const QString &fileName) :
     m_currentBc(0)
 {
     setProjectContext(Core::Context(Constants::PROJECT_ID));
-    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
-    pl.add(ProjectExplorer::Constants::LANG_QMLJS);
-    setProjectLanguages(pl);
-
+    setProjectLanguages(Core::Context(ProjectExplorer::Constants::LANG_CXX));
 
     connect(this, SIGNAL(activeTargetChanged(ProjectExplorer::Target*)),
             this, SLOT(changeActiveTarget(ProjectExplorer::Target*)));

src/plugins/qmlprojectmanager/qmlproject.cpp

@@ -109,7 +109,7 @@ QmlProject::QmlProject(Internal::Manager *manager, const QString &fileName)
       m_modelManager(QmlJS::ModelManagerInterface::instance())
 {
     setProjectContext(Core::Context(QmlProjectManager::Constants::PROJECTCONTEXT));
-    setProjectLanguages(Core::Context(ProjectExplorer::Constants::LANG_QMLJS));
+    setProjectLanguages(Core::Context(QmlProjectManager::Constants::LANG_QML));
 
     QFileInfo fileInfo(m_fileName);
     m_projectName = fileInfo.completeBaseName();

src/plugins/qmlprojectmanager/qmlprojectconstants.h

@@ -36,6 +36,7 @@ namespace QmlProjectManager {
 namespace Constants {
 
 const char *const PROJECTCONTEXT     = "QmlProject.ProjectContext";
+const char *const LANG_QML           = "QML";
 const char *const QMLPROJECT_MIMETYPE        = QmlJSTools::Constants::QMLPROJECT_MIMETYPE;
 
 } // namespace Constants

src/plugins/qt4projectmanager/qt4project.cpp

@@ -353,9 +353,7 @@ Qt4Project::Qt4Project(Qt4Manager *manager, const QString& fileName) :
     m_activeTarget(0)
 {
     setProjectContext(Core::Context(Qt4ProjectManager::Constants::PROJECT_ID));
-    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
-    pl.add(ProjectExplorer::Constants::LANG_QMLJS);
-    setProjectLanguages(pl);
+    setProjectLanguages(Core::Context(ProjectExplorer::Constants::LANG_CXX));
 
     m_asyncUpdateTimer.setSingleShot(true);
     m_asyncUpdateTimer.setInterval(3000);
@@ -637,6 +635,15 @@ void Qt4Project::updateQmlJSCodeModel()
         }
     }
 
+    // If the project directory has a pro/pri file that includes a qml or quick or declarative
+    // library then chances of the project being a QML project is quite high.
+    // This assumption fails when there are no QDeclarativeEngine/QDeclarativeView (QtQuick 1)
+    // or QQmlEngine/QQuickView (QtQuick 2) instances.
+    Core::Context pl(ProjectExplorer::Constants::LANG_CXX);
+    if (hasQmlLib)
+        pl.add(ProjectExplorer::Constants::LANG_QMLJS);
+    setProjectLanguages(pl);
+
     projectInfo.importPaths.removeDuplicates();
 
     setProjectLanguage(ProjectExplorer::Constants::LANG_QMLJS, !projectInfo.sourceFiles.isEmpty());