QML Debugger: Mangle shadow build filenames

Without doing some magic for the filenames, we go to shadow build files
instead of the real ones, resulting in confusion. The user should never
see the shadow build files while debugging.

Reviewed-by: hjk

src/plugins/debugger/qml/qmlengine.cpp

@@ -126,6 +126,25 @@ void QmlEngine::pauseConnection()
     m_adapter->pauseConnection();
 }
 
+void QmlEngine::gotoLocation(const QString &fileName, int lineNumber, bool setMarker)
+{
+    QString processedFilename = fileName;
+
+    if (isShadowBuildProject())
+        processedFilename = fromShadowBuildFilename(fileName);
+
+    DebuggerEngine::gotoLocation(processedFilename, lineNumber, setMarker);
+}
+
+void QmlEngine::gotoLocation(const StackFrame &frame, bool setMarker)
+{
+    StackFrame adjustedFrame = frame;
+    if (isShadowBuildProject())
+        adjustedFrame.file = fromShadowBuildFilename(frame.file);
+
+    DebuggerEngine::gotoLocation(adjustedFrame, setMarker);
+}
+
 void QmlEngine::setupInferior()
 {
     QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
@@ -380,7 +399,10 @@ void QmlEngine::attemptBreakpointSynchronization()
     QSet< QPair<QString, qint32> > breakList;
     for (int index = 0; index != handler->size(); ++index) {
         BreakpointData *data = handler->at(index);
-        breakList << qMakePair(data->fileName, data->lineNumber.toInt());
+        QString processedFilename = data->fileName;
+        if (isShadowBuildProject())
+            processedFilename = toShadowBuildFilename(data->fileName);
+        breakList << qMakePair(processedFilename, data->lineNumber.toInt());
     }
 
     {
@@ -677,6 +699,73 @@ void QmlEngine::executeDebuggerCommand(const QString& command)
     sendMessage(reply);
 }
 
+bool QmlEngine::isShadowBuildProject() const
+{
+    if (!startParameters().projectBuildDir.isEmpty()
+        && (startParameters().projectDir != startParameters().projectBuildDir))
+    {
+        return true;
+    }
+    return false;
+}
+
+QString QmlEngine::qmlImportPath() const
+{
+    QString result;
+    const QString qmlImportPathPrefix("QML_IMPORT_PATH=");
+    QStringList env = startParameters().environment;
+    foreach(const QString &envStr, env) {
+        if (envStr.startsWith(qmlImportPathPrefix)) {
+            result = envStr.mid(qmlImportPathPrefix.length());
+            break;
+        }
+    }
+    return result;
+}
+
+QString QmlEngine::toShadowBuildFilename(const QString &filename) const
+{
+    QString newFilename = filename;
+    QString importPath = qmlImportPath();
+
+    newFilename = mangleFilenamePaths(filename, startParameters().projectDir, startParameters().projectBuildDir);
+    if (newFilename == filename && !importPath.isEmpty()) {
+        newFilename = mangleFilenamePaths(filename, startParameters().projectDir, importPath);
+    }
+
+    return newFilename;
+}
+
+QString QmlEngine::mangleFilenamePaths(const QString &filename, const QString &oldBasePath, const QString &newBasePath) const
+{
+    QDir oldBaseDir(oldBasePath);
+    QDir newBaseDir(newBasePath);
+    QFileInfo fileInfo(filename);
+
+    if (oldBaseDir.exists() && newBaseDir.exists() && fileInfo.exists()) {
+        if (fileInfo.absoluteFilePath().startsWith(oldBaseDir.canonicalPath())) {
+            QString fileRelativePath = fileInfo.canonicalFilePath().mid(oldBasePath.length());
+            QFileInfo projectFile(newBaseDir.canonicalPath() + QLatin1Char('/') + fileRelativePath);
+
+            if (projectFile.exists())
+                return projectFile.canonicalFilePath();
+        }
+    }
+    return filename;
+}
+
+QString QmlEngine::fromShadowBuildFilename(const QString &filename) const
+{
+    QString newFilename = filename;
+    QString importPath = qmlImportPath();
+
+    newFilename = mangleFilenamePaths(filename, startParameters().projectBuildDir, startParameters().projectDir);
+    if (newFilename == filename && !importPath.isEmpty()) {
+        newFilename = mangleFilenamePaths(filename, startParameters().projectBuildDir, importPath);
+    }
+
+    return newFilename;
+}
 
 } // namespace Internal
 } // namespace Debugger