Clang: Use timer in ClangIpcServer in the file watcher to send diagnostics

One mechanism for all diagnostic updates is better to maintain.

Change-Id: I774577bfa343162ded362977a0727a12379d1eab
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/tools/clangbackend/ipcsource/clangfilesystemwatcher.cpp

@@ -59,14 +59,6 @@ ClangFileSystemWatcher::ClangFileSystemWatcher(TranslationUnits &translationUnit
             &QFileSystemWatcher::fileChanged,
             this,
             &ClangFileSystemWatcher::updateTranslationUnitsWithChangedDependencies);
-
-    connect(&changedDiagnosticsTimer,
-            &QTimer::timeout,
-            this,
-            &ClangFileSystemWatcher::sendChangedDiagnostics);
-
-    changedDiagnosticsTimer.setSingleShot(true);
-    changedDiagnosticsTimer.setInterval(100);
 }
 
 void ClangFileSystemWatcher::addFiles(const QSet<Utf8String> &filePaths)
@@ -77,13 +69,9 @@ void ClangFileSystemWatcher::addFiles(const QSet<Utf8String> &filePaths)
 void ClangFileSystemWatcher::updateTranslationUnitsWithChangedDependencies(const QString &filePath)
 {
     translationUnits.updateTranslationUnitsWithChangedDependencies(filePath);
-    changedDiagnosticsTimer.start();
     watcher.addPath(filePath);
-}
 
-void ClangFileSystemWatcher::sendChangedDiagnostics()
-{
-    translationUnits.sendChangedDiagnostics();
+    emit fileChanged();
 }
 
 } // namespace ClangBackEnd

src/tools/clangbackend/ipcsource/clangfilesystemwatcher.h

@@ -33,7 +33,6 @@
 
 #include <QFileSystemWatcher>
 #include <QSet>
-#include <QTimer>
 
 class Utf8String;
 
@@ -50,13 +49,14 @@ public:
 
     void addFiles(const QSet<Utf8String> &filePaths);
 
+signals:
+    void fileChanged();
+
 private:
     void updateTranslationUnitsWithChangedDependencies(const QString &filePath);
-    void sendChangedDiagnostics();
 
 private:
     QFileSystemWatcher watcher;
-    QTimer changedDiagnosticsTimer;
     TranslationUnits &translationUnits;
 };
 

src/tools/clangbackend/ipcsource/clangipcserver.cpp

@@ -69,6 +69,10 @@ ClangIpcServer::ClangIpcServer()
     QObject::connect(&sendDiagnosticsTimer,
                      &QTimer::timeout,
                      [this] () { translationUnits.sendChangedDiagnostics(); });
+
+    QObject::connect(translationUnits.clangFileSystemWatcher(),
+                     &ClangFileSystemWatcher::fileChanged,
+                     [this] () { sendDiagnosticsTimer.start(); });
 }
 
 void ClangIpcServer::end()

src/tools/clangbackend/ipcsource/clangipcserver.h

@@ -42,6 +42,7 @@
 #include <utf8string.h>
 
 #include <QMap>
+#include <QTimer>
 
 namespace ClangBackEnd {
 

src/tools/clangbackend/ipcsource/translationunits.cpp

@@ -166,6 +166,11 @@ QVector<FileContainer> TranslationUnits::newerFileContainers(const QVector<FileC
     return newerContainers;
 }
 
+const ClangFileSystemWatcher *TranslationUnits::clangFileSystemWatcher() const
+{
+    return &fileSystemWatcher;
+}
+
 void TranslationUnits::createOrUpdateTranslationUnit(const FileContainer &fileContainer)
 {
     TranslationUnit::FileExistsCheck checkIfFileExists = fileContainer.hasUnsavedFileContent() ? TranslationUnit::DoNotCheckIfFileExists : TranslationUnit::CheckIfFileExists;

src/tools/clangbackend/ipcsource/translationunits.h

@@ -71,6 +71,8 @@ public:
 
     QVector<FileContainer> newerFileContainers(const QVector<FileContainer> &fileContainers) const;
 
+    const ClangFileSystemWatcher *clangFileSystemWatcher() const;
+
 private:
     void createOrUpdateTranslationUnit(const FileContainer &fileContainer);
     std::vector<TranslationUnit>::iterator findTranslationUnit(const FileContainer &fileContainer);