Fix memory leak of response.

Turns Response into a QObject and sets parent to the
command that emits it.

Each Command is also a child of the decorator commands,
Timeout and PageLoading commnds, so that deleting the
top level command will delete all the children.

See discussion in #430.

src/Authenticate.cpp

@@ -13,6 +13,6 @@ void Authenticate::start() {
   networkAccessManager->setUserName(username);
   networkAccessManager->setPassword(password);
 
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 

src/ClearCookies.cpp

@@ -9,5 +9,5 @@ ClearCookies::ClearCookies(WebPageManager *manager, QStringList &arguments, QObj
 void ClearCookies::start()
 {
   manager()->cookieJar()->clearCookies();
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/ClearPromptText.cpp

@@ -7,5 +7,5 @@ ClearPromptText::ClearPromptText(WebPageManager *manager, QStringList &arguments
 void ClearPromptText::start()
 {
   page()->setPromptText(QString());
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/Command.cpp

@@ -6,3 +6,12 @@ Command::Command(QObject *parent) : QObject(parent) {
 QString Command::toString() const {
   return metaObject()->className();
 }
+
+void Command::emitFinished(bool success) {
+  emit finished(new Response(success, this));
+}
+
+void Command::emitFinished(bool success, QString message) {
+  emit finished(new Response(success, message, this));
+}
+

src/Command.h

@@ -3,6 +3,7 @@
 
 #include <QObject>
 #include "Response.h"
+#include <QString>
 
 class Command : public QObject {
   Q_OBJECT
@@ -12,6 +13,10 @@ class Command : public QObject {
     virtual void start() = 0;
     virtual QString toString() const;
 
+  protected:
+    void emitFinished(bool success);
+    void emitFinished(bool success, QString message);
+
   signals:
     void finished(Response *response);
 };

src/Connection.cpp

@@ -43,13 +43,15 @@ void Connection::pendingLoadFinished(bool success) {
 void Connection::writePageLoadFailure() {
   m_pageSuccess = true;
   QString message = currentPage()->failureString();
-  writeResponse(new Response(false, message));
+  Response *response = new Response(false, message, this);
+  writeResponse(response);
+  delete response;
 }
 
 void Connection::finishCommand(Response *response) {
   m_pageSuccess = true;
-  sender()->deleteLater();
   writeResponse(response);
+  sender()->deleteLater();
 }
 
 void Connection::writeResponse(Response *response) {
@@ -64,7 +66,6 @@ void Connection::writeResponse(Response *response) {
   QString messageLength = QString::number(messageUtf8.size()) + "\n";
   m_socket->write(messageLength.toAscii());
   m_socket->write(messageUtf8);
-  delete response;
 }
 
 WebPage *Connection::currentPage() {

src/ConsoleMessages.cpp

@@ -6,6 +6,6 @@ ConsoleMessages::ConsoleMessages(WebPageManager *manager, QStringList &arguments
 }
 
 void ConsoleMessages::start() {
-  emit finished(new Response(true, page()->consoleMessages()));
+  emitFinished(true, page()->consoleMessages());
 }
 

src/CurrentUrl.cpp

@@ -9,6 +9,6 @@ void CurrentUrl::start() {
   QStringList arguments;
   QVariant result = page()->invokeCapybaraFunction("currentUrl", arguments);
   QString url = result.toString();
-  emit finished(new Response(true, url));
+  emitFinished(true, url);
 }
 

src/EnableLogging.cpp

@@ -6,5 +6,5 @@ EnableLogging::EnableLogging(WebPageManager *manager, QStringList &arguments, QO
 
 void EnableLogging::start() {
   manager()->enableLogging();
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/Evaluate.cpp

@@ -10,7 +10,7 @@ Evaluate::Evaluate(WebPageManager *manager, QStringList &arguments, QObject *par
 void Evaluate::start() {
   QVariant result = page()->currentFrame()->evaluateJavaScript(arguments()[0]);
   addVariant(result);
-  emit finished(new Response(true, m_buffer));
+  emitFinished(true, m_buffer);
 }
 
 void Evaluate::addVariant(QVariant &object) {

src/Execute.cpp

@@ -9,9 +9,9 @@ void Execute::start() {
   QString script = arguments()[0] + QString("; 'success'");
   QVariant result = page()->currentFrame()->evaluateJavaScript(script);
   if (result.isValid()) {
-    emit finished(new Response(true));
+    emitFinished(true);
   } else {
-    emit finished(new Response(false, QString("Javascript failed to execute")));
+    emitFinished(false, QString("Javascript failed to execute"));
   }
 }
 

src/Find.cpp

@@ -12,9 +12,9 @@ void Find::start() {
 
   if (result.isValid()) {
     message = result.toString();
-    emit finished(new Response(true, message));
+    emitFinished(true, message);
   } else {
-    emit finished(new Response(false, QString("Invalid XPath expression")));
+    emitFinished(false, QString("Invalid XPath expression"));
   }
 }
 

src/FrameFocus.cpp

@@ -51,7 +51,7 @@ void FrameFocus::focusId(QString name) {
 
 void FrameFocus::focusParent() {
   if (page()->currentFrame()->parentFrame() == 0) {
-    emit finished(new Response(false, QString("Already at parent frame.")));
+    emitFinished(false, QString("Already at parent frame."));
   } else {
     page()->currentFrame()->parentFrame()->setFocus();
     success();
@@ -59,9 +59,9 @@ void FrameFocus::focusParent() {
 }
 
 void FrameFocus::frameNotFound() {
-  emit finished(new Response(false, QString("Unable to locate frame. ")));
+  emitFinished(false, QString("Unable to locate frame. "));
 }
 
 void FrameFocus::success() {
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/GetCookies.cpp

@@ -15,5 +15,5 @@ void GetCookies::start()
     m_buffer.append(cookie.toRawForm());
     m_buffer.append("\n");
   }
-  emit finished(new Response(true, m_buffer));
+  emitFinished(true, m_buffer);
 }

src/GetTimeout.cpp

@@ -5,5 +5,5 @@ GetTimeout::GetTimeout(WebPageManager *manager, QStringList &arguments, QObject
 }
 
 void GetTimeout::start() {
-  emit finished(new Response(true, QString::number(manager()->getTimeout())));
+  emitFinished(true, QString::number(manager()->getTimeout()));
 }

src/GetWindowHandle.cpp

@@ -7,5 +7,5 @@ GetWindowHandle::GetWindowHandle(WebPageManager *manager, QStringList &arguments
 }
 
 void GetWindowHandle::start() {
-  emit finished(new Response(true, page()->uuid()));
+  emitFinished(true, page()->uuid());
 }

src/GetWindowHandles.cpp

@@ -16,5 +16,5 @@ void GetWindowHandles::start() {
 
   handles += stringList.join(",") + "]";
 
-  emit finished(new Response(true, handles));
+  emitFinished(true, handles);
 }

src/Header.cpp

@@ -15,5 +15,5 @@ void Header::start() {
   } else {
     networkAccessManager->addHeader(key, value);
   }
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/Headers.cpp

@@ -11,6 +11,6 @@ void Headers::start() {
   foreach(QNetworkReply::RawHeaderPair header, page()->pageHeaders())
     headers << header.first+": "+header.second;
 
-  emit finished(new Response(true, headers.join("\n")));
+  emitFinished(true, headers.join("\n"));
 }
 

src/IgnoreSslErrors.cpp

@@ -8,6 +8,6 @@ IgnoreSslErrors::IgnoreSslErrors(WebPageManager *manager, QStringList &arguments
 
 void IgnoreSslErrors::start() {
   manager()->setIgnoreSslErrors(true);
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 

src/JavascriptAlertMessages.cpp

@@ -6,5 +6,5 @@ JavascriptAlertMessages::JavascriptAlertMessages(WebPageManager *manager, QStrin
 
 void JavascriptAlertMessages::start()
 {
-  emit finished(new Response(true, page()->alertMessages()));
+  emitFinished(true, page()->alertMessages());
 }

src/JavascriptConfirmMessages.cpp

@@ -6,5 +6,5 @@ JavascriptConfirmMessages::JavascriptConfirmMessages(WebPageManager *manager, QS
 
 void JavascriptConfirmMessages::start()
 {
-  emit finished(new Response(true, page()->confirmMessages()));
+  emitFinished(true, page()->confirmMessages());
 }

src/JavascriptPromptMessages.cpp

@@ -6,5 +6,5 @@ JavascriptPromptMessages::JavascriptPromptMessages(WebPageManager *manager, QStr
 
 void JavascriptPromptMessages::start()
 {
-  emit finished(new Response(true, page()->promptMessages()));
+  emitFinished(true, page()->promptMessages());
 }

src/Node.cpp

@@ -10,7 +10,7 @@ void Node::start() {
   QString functionName = functionArguments.takeFirst();
   QVariant result = page()->invokeCapybaraFunction(functionName, functionArguments);
   QString attributeValue = result.toString();
-  emit finished(new Response(true, attributeValue));
+  emitFinished(true, attributeValue);
 }
 
 QString Node::toString() const {

src/NullCommand.cpp

@@ -8,6 +8,6 @@ NullCommand::NullCommand(QString name, QObject *parent) : Command(parent) {
 
 void NullCommand::start() {
   QString failure = QString("[Capybara WebKit] Unknown command: ") + m_name + "\n";
-  emit finished(new Response(false, failure));
+  emitFinished(false, failure);
 }
 

src/PageLoadingCommand.cpp

@@ -9,6 +9,7 @@ PageLoadingCommand::PageLoadingCommand(Command *command, WebPageManager *manager
   m_pageLoadingFromCommand = false;
   m_pageSuccess = true;
   m_pendingResponse = NULL;
+  m_command->setParent(this);
 }
 
 void PageLoadingCommand::start() {
@@ -29,7 +30,7 @@ void PageLoadingCommand::pendingLoadFinished(bool success) {
         emit finished(m_pendingResponse);
       } else {
         QString message = m_manager->currentPage()->failureString();
-        emit finished(new Response(false, message));
+        emitFinished(false, message);
       }
     }
   }
@@ -43,7 +44,7 @@ void PageLoadingCommand::pageLoadingFromCommand() {
 void PageLoadingCommand::commandFinished(Response *response) {
   disconnect(m_manager, SIGNAL(loadStarted()), this, SLOT(pageLoadingFromCommand()));
   m_manager->logger() << "Finished" << m_command->toString() << "with response" << response->toString();
-  m_command->deleteLater();
+
   if (m_pageLoadingFromCommand)
     m_pendingResponse = response;
   else

src/Render.cpp

@@ -15,5 +15,5 @@ void Render::start() {
 
   bool result = page()->render( imagePath );
 
-  emit finished(new Response(result));
+  emitFinished(result);
 }

src/Reset.cpp

@@ -10,6 +10,6 @@ void Reset::start() {
 
   manager()->reset();
 
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 

src/ResizeWindow.cpp

@@ -12,6 +12,6 @@ void ResizeWindow::start() {
   QSize size(width, height);
   page()->setViewportSize(size);
 
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 

src/Response.cpp

@@ -1,17 +1,17 @@
 #include "Response.h"
 #include <iostream>
 
-Response::Response(bool success, QString message) {
+Response::Response(bool success, QString message, QObject *parent) : QObject(parent) {
   m_success = success;
   m_message = message.toUtf8();
 }
 
-Response::Response(bool success, QByteArray message) {
+Response::Response(bool success, QByteArray message, QObject *parent) : QObject(parent) {
   m_success = success;
   m_message = message;
 }
 
-Response::Response(bool success) {
+Response::Response(bool success, QObject *parent) : QObject(parent) {
   m_success = success;
 }
 

src/Response.h

@@ -1,11 +1,17 @@
+#ifndef RESPONSE_H
+#define RESPONSE_H
+
+#include <QObject>
 #include <QString>
 #include <QByteArray>
 
-class Response {
+class Response : public QObject {
+  Q_OBJECT
+
   public:
-    Response(bool success, QString message);
+    Response(bool success, QString message, QObject *parent);
-    Response(bool success, QByteArray message);
+    Response(bool success, QByteArray message, QObject *parent);
-    Response(bool success);
+    Response(bool success, QObject *parent);
     bool isSuccess() const;
     QByteArray message() const;
     QString toString() const;
@@ -14,3 +20,6 @@ class Response {
     bool m_success;
     QByteArray m_message;
 };
+
+#endif
+

src/SetConfirmAction.cpp

@@ -7,5 +7,5 @@ SetConfirmAction::SetConfirmAction(WebPageManager *manager, QStringList &argumen
 void SetConfirmAction::start()
 {
   page()->setConfirmAction(arguments()[0]);
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetCookie.cpp

@@ -11,5 +11,5 @@ void SetCookie::start()
   QList<QNetworkCookie> cookies = QNetworkCookie::parseCookies(arguments()[0].toAscii());
   NetworkCookieJar *jar = manager()->cookieJar();
   jar->overwriteCookies(cookies);
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetPromptAction.cpp

@@ -7,5 +7,5 @@ SetPromptAction::SetPromptAction(WebPageManager *manager, QStringList &arguments
 void SetPromptAction::start()
 {
   page()->setPromptAction(arguments()[0]);
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetPromptText.cpp

@@ -7,5 +7,5 @@ SetPromptText::SetPromptText(WebPageManager *manager, QStringList &arguments, QO
 void SetPromptText::start()
 {
   page()->setPromptText(arguments()[0]);
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetProxy.cpp

@@ -19,5 +19,5 @@ void SetProxy::start()
                           arguments()[3]);
 
   page()->networkAccessManager()->setProxy(proxy);
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetSkipImageLoading.cpp

@@ -8,5 +8,5 @@ SetSkipImageLoading::SetSkipImageLoading(WebPageManager *manager, QStringList &a
 
 void SetSkipImageLoading::start() {
   page()->setSkipImageLoading(arguments().contains("true"));
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/SetTimeout.cpp

@@ -11,9 +11,9 @@ void SetTimeout::start() {
 
   if (ok) {
     manager()->setTimeout(timeout);
-    emit finished(new Response(true));
+    emitFinished(true);
   } else {
-    emit finished(new Response(false, QString("Invalid value for timeout")));
+    emitFinished(false, QString("Invalid value for timeout"));
   }
 }
 

src/SetUrlBlacklist.cpp

@@ -10,6 +10,6 @@ SetUrlBlacklist::SetUrlBlacklist(WebPageManager *manager, QStringList &arguments
 void SetUrlBlacklist::start() {
   NetworkAccessManager* networkAccessManager = page()->networkAccessManager();
   networkAccessManager->setUrlBlacklist(arguments());
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 

src/Status.cpp

@@ -8,6 +8,6 @@ Status::Status(WebPageManager *manager, QStringList &arguments, QObject *parent)
 
 void Status::start() {
   int status = page()->getLastStatus();
-  emit finished(new Response(true, QString::number(status)));
+  emitFinished(true, QString::number(status));
 }
 

src/TimeoutCommand.cpp

@@ -10,6 +10,7 @@ TimeoutCommand::TimeoutCommand(Command *command, WebPageManager *manager, QObjec
   m_manager = manager;
   m_timer = new QTimer(this);
   m_timer->setSingleShot(true);
+  m_command->setParent(this);
   connect(m_timer, SIGNAL(timeout()), this, SLOT(commandTimeout()));
   connect(m_manager, SIGNAL(loadStarted()), this, SLOT(pageLoadingFromCommand()));
 }
@@ -44,7 +45,7 @@ void TimeoutCommand::pendingLoadFinished(bool success) {
     disconnect(m_timer, SIGNAL(timeout()), this, SLOT(commandTimeout()));
     disconnect(m_manager, SIGNAL(loadStarted()), this, SLOT(pageLoadingFromCommand()));
     disconnect(m_manager, SIGNAL(pageFinished(bool)), this, SLOT(pendingLoadFinished(bool)));
-    emit finished(new Response(false, m_manager->currentPage()->failureString()));
+    emitFinished(false, m_manager->currentPage()->failureString());
   }
 }
 
@@ -57,15 +58,13 @@ void TimeoutCommand::commandTimeout() {
   disconnect(m_manager, SIGNAL(pageFinished(bool)), this, SLOT(pendingLoadFinished(bool)));
   disconnect(m_command, SIGNAL(finished(Response *)), this, SLOT(commandFinished(Response *)));
   m_manager->currentPage()->triggerAction(QWebPage::Stop);
-  m_command->deleteLater();
+  emit finished(new Response(false, QString("timeout"), this));
-  emit finished(new Response(false, QString("timeout")));
 }
 
 void TimeoutCommand::commandFinished(Response *response) {
   disconnect(m_timer, SIGNAL(timeout()), this, SLOT(commandTimeout()));
   disconnect(m_manager, SIGNAL(loadStarted()), this, SLOT(pageLoadingFromCommand()));
   disconnect(m_manager, SIGNAL(pageFinished(bool)), this, SLOT(pendingLoadFinished(bool)));
-  m_command->deleteLater();
   emit finished(response);
 }
 

src/Visit.cpp

@@ -9,5 +9,5 @@ Visit::Visit(WebPageManager *manager, QStringList &arguments, QObject *parent) :
 void Visit::start() {
   QUrl requestedUrl = QUrl::fromEncoded(arguments()[0].toUtf8(), QUrl::StrictMode);
   page()->currentFrame()->load(QUrl(requestedUrl));
-  emit finished(new Response(true));
+  emitFinished(true);
 }

src/WindowFocus.cpp

@@ -12,12 +12,12 @@ void WindowFocus::start() {
 }
 
 void WindowFocus::windowNotFound() {
-  emit finished(new Response(false, QString("Unable to locate window. ")));
+  emitFinished(false, QString("Unable to locate window. "));
 }
 
 void WindowFocus::success(WebPage *page) {
   page->setFocus();
-  emit finished(new Response(true));
+  emitFinished(true);
 }
 
 void WindowFocus::focusWindow(QString selector) {

src/body.cpp

@@ -12,5 +12,5 @@ void Body::start() {
   else
     result = page()->currentFrame()->toHtml();
 
-  emit finished(new Response(true, result));
+  emitFinished(true, result);
 }