Improve handling of disabled parser and re-enabling parser

Instead of always parsing again when re-enabling parser do it only
if there are changes of the current project.
If the current project has not changed since last parsing just rely
on the cached information.

Change-Id: I7681318132f37172730648604ddbecf1cd37d177
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

4 files changed, 36 insertions, 43 deletions

diff --git a/plugins/autotest/testcodeparser.cpp b/plugins/autotest/testcodeparser.cpp
index ed8e1facf4..004168ab6a 100644
--- a/plugins/autotest/testcodeparser.cpp
+++ b/plugins/autotest/testcodeparser.cpp
@@ -59,7 +59,8 @@ TestCodeParser::TestCodeParser(TestTreeModel *parent)
       m_pendingUpdate(false),
       m_fullUpdatePostPoned(false),
       m_partialUpdatePostPoned(false),
-      m_parserState(Idle)
+      m_dirty(true),
+      m_parserState(Disabled)
 {
     // connect to ProgressManager to post-pone test parsing when CppModelManager is parsing
     auto progressManager = qobject_cast<Core::ProgressManager *>(Core::ProgressManager::instance());
@@ -76,12 +77,22 @@ TestCodeParser::~TestCodeParser()
     clearCache();
 }
 
+ProjectExplorer::Project *currentProject()
+{
+    const ProjectExplorer::SessionManager *session = ProjectExplorer::SessionManager::instance();
+    if (!session || !session->hasProjects())
+        return 0;
+    return session->startupProject();
+}
+
 void TestCodeParser::setState(State state)
 {
     m_parserState = state;
     if (m_parserState == Disabled) {
         m_pendingUpdate = m_fullUpdatePostPoned = m_partialUpdatePostPoned = false;
         m_postPonedFiles.clear();
+    } else if (m_parserState == Idle && m_dirty && currentProject()) {
+        scanForTests(m_postPonedFiles.toList());
     }
 }
 
@@ -90,14 +101,6 @@ void TestCodeParser::emitUpdateTestTree()
     QTimer::singleShot(1000, this, SLOT(updateTestTree()));
 }
 
-ProjectExplorer::Project *currentProject()
-{
-    const ProjectExplorer::SessionManager *session = ProjectExplorer::SessionManager::instance();
-    if (!session || !session->hasProjects())
-        return 0;
-    return session->startupProject();
-}
-
 void TestCodeParser::updateTestTree()
 {
     if (!m_parserEnabled) {
@@ -578,14 +581,29 @@ bool TestCodeParser::postponed(const QStringList &fileList)
         }
         return true;
     case Disabled:
-        qWarning("Checking for postponing but being disabled...");
-        return false;
+        break;
     }
     QTC_ASSERT(false, return false); // should not happen at all
 }
 
 void TestCodeParser::scanForTests(const QStringList &fileList)
 {
+    if (m_parserState == Disabled) {
+        m_dirty = true;
+        if (fileList.isEmpty()) {
+            m_fullUpdatePostPoned = true;
+            m_partialUpdatePostPoned = false;
+            m_postPonedFiles.clear();
+        } else {
+            if (!m_fullUpdatePostPoned) {
+                m_partialUpdatePostPoned = true;
+                foreach (const QString &file, fileList)
+                    m_postPonedFiles.insert(file);
+            }
+        }
+        return;
+    }
+
     if (postponed(fileList))
         return;
 
@@ -730,6 +748,7 @@ void TestCodeParser::onFinished()
     case FullParse:
         m_parserState = Idle;
         emit parsingFinished();
+        m_dirty = false;
         break;
     default:
         qWarning("I should not be here...");
@@ -752,6 +771,9 @@ void TestCodeParser::onPartialParsingFinished()
             tmp << file;
         m_postPonedFiles.clear();
         scanForTests(tmp);
+    } else {
+        m_dirty = false;
+        emit parsingFinished();
     }
 }
 
diff --git a/plugins/autotest/testcodeparser.h b/plugins/autotest/testcodeparser.h
index c4ca773f38..85582d1d5d 100644
--- a/plugins/autotest/testcodeparser.h
+++ b/plugins/autotest/testcodeparser.h
@@ -113,6 +113,7 @@ private:
     bool m_pendingUpdate;
     bool m_fullUpdatePostPoned;
     bool m_partialUpdatePostPoned;
+    bool m_dirty;
     QSet<QString> m_postPonedFiles;
     State m_parserState;
 };
diff --git a/plugins/autotest/testtreemodel.cpp b/plugins/autotest/testtreemodel.cpp
index 0b21ec3cea..e707aaa052 100644
--- a/plugins/autotest/testtreemodel.cpp
+++ b/plugins/autotest/testtreemodel.cpp
@@ -51,8 +51,7 @@ TestTreeModel::TestTreeModel(QObject *parent) :
     m_autoTestRootItem(new TestTreeItem(tr("Auto Tests"), QString(), TestTreeItem::ROOT, m_rootItem)),
     m_quickTestRootItem(new TestTreeItem(tr("Qt Quick Tests"), QString(), TestTreeItem::ROOT, m_rootItem)),
     m_parser(new TestCodeParser(this)),
-    m_connectionsInitialized(false),
-    m_initializationCounter(0)
+    m_connectionsInitialized(false)
 {
     m_rootItem->appendChild(m_autoTestRootItem);
     m_rootItem->appendChild(m_quickTestRootItem);
@@ -103,13 +102,10 @@ TestTreeModel::~TestTreeModel()
 
 void TestTreeModel::enableParsing()
 {
-    ++m_initializationCounter;
-
+    m_parser->setState(TestCodeParser::Idle);
     if (m_connectionsInitialized)
         return;
 
-    m_parser->setState(TestCodeParser::Idle);
-
     ProjectExplorer::SessionManager *sm = ProjectExplorer::SessionManager::instance();
     connect(sm, &ProjectExplorer::SessionManager::startupProjectChanged,
             m_parser, &TestCodeParser::emitUpdateTestTree);
@@ -126,35 +122,11 @@ void TestTreeModel::enableParsing()
     connect(qmlJsMM, &QmlJS::ModelManagerInterface::aboutToRemoveFiles,
             m_parser, &TestCodeParser::removeFiles, Qt::QueuedConnection);
     m_connectionsInitialized = true;
-    m_parser->updateTestTree();
 }
 
 void TestTreeModel::disableParsing()
 {
-    if (!m_connectionsInitialized)
-        return;
-    if (--m_initializationCounter != 0)
-        return;
-
-    ProjectExplorer::SessionManager *sm = ProjectExplorer::SessionManager::instance();
-    disconnect(sm, &ProjectExplorer::SessionManager::startupProjectChanged,
-               m_parser, &TestCodeParser::emitUpdateTestTree);
-
-    CppTools::CppModelManager *cppMM = CppTools::CppModelManager::instance();
-    disconnect(cppMM, &CppTools::CppModelManager::documentUpdated,
-               m_parser, &TestCodeParser::onCppDocumentUpdated);
-    disconnect(cppMM, &CppTools::CppModelManager::aboutToRemoveFiles,
-               m_parser, &TestCodeParser::removeFiles);
-
-    QmlJS::ModelManagerInterface *qmlJsMM = QmlJS::ModelManagerInterface::instance();
-    disconnect(qmlJsMM, &QmlJS::ModelManagerInterface::documentUpdated,
-               m_parser, &TestCodeParser::onQmlDocumentUpdated);
-    disconnect(qmlJsMM, &QmlJS::ModelManagerInterface::aboutToRemoveFiles,
-               m_parser, &TestCodeParser::removeFiles);
-
     m_parser->setState(TestCodeParser::Disabled);
-
-    m_connectionsInitialized = false;
 }
 
 QModelIndex TestTreeModel::index(int row, int column, const QModelIndex &parent) const
diff --git a/plugins/autotest/testtreemodel.h b/plugins/autotest/testtreemodel.h
index f1229cedf5..437aa787be 100644
--- a/plugins/autotest/testtreemodel.h
+++ b/plugins/autotest/testtreemodel.h
@@ -113,8 +113,6 @@ private:
     TestTreeItem *m_quickTestRootItem;
     TestCodeParser *m_parser;
     bool m_connectionsInitialized;
-    int m_initializationCounter;
-
 };
 
 class TestTreeSortFilterModel : public QSortFilterProxyModel