Code cleanup in Welcome-plugin.

Remove unused page from stacked widget form, move duplicated code
into utility functions, reduce state variables and string comparisons
in RssFetcher, clean out includes. Give WelcomeModeTreeWidget
uniform row height.

7 files changed, 153 insertions, 149 deletions

diff --git a/src/plugins/welcome/rssfetcher.cpp b/src/plugins/welcome/rssfetcher.cpp
index 96219d7f0e..ecd1140910 100644
--- a/src/plugins/welcome/rssfetcher.cpp
+++ b/src/plugins/welcome/rssfetcher.cpp
@@ -27,6 +27,9 @@
 **
 **************************************************************************/
 
+#include "rssfetcher.h"
+#include <coreplugin/coreconstants.h>
+
 #include <QtCore/QDebug>
 #include <QtCore/QSysInfo>
 #include <QtCore/QLocale>
@@ -35,10 +38,9 @@
 #include <QtNetwork/QNetworkReply>
 #include <QtNetwork/QNetworkRequest>
 #include <QtNetwork/QNetworkProxyFactory>
+#include <QtNetwork/QNetworkAccessManager>
 
-#include <coreplugin/coreconstants.h>
-
-#include "rssfetcher.h"
+#include <QtCore/QXmlStreamReader>
 
 #ifdef Q_OS_UNIX
 #include <sys/utsname.h>
@@ -98,11 +100,13 @@ static const QString getOsString()
     }
 #elif defined (Q_OS_UNIX)
     struct utsname uts;
-    if (uname(&uts) == 0)
-        osString += QString("%1 %2").arg(QLatin1String(uts.sysname))
-                        .arg(QLatin1String(uts.release));
-    else
+    if (uname(&uts) == 0) {
+        osString += QLatin1String(uts.sysname);
+        osString += QLatin1Char(' ');
+        osString += QLatin1String(uts.release);
+    } else {
         osString += QLatin1String("Unix (Unknown)");
+    }
 #else
     ossttring = QLatin1String("Unknown OS");
 #endif
@@ -110,64 +114,103 @@ static const QString getOsString()
 }
 
 RSSFetcher::RSSFetcher(int maxItems, QObject *parent)
-    : QObject(parent), m_items(0), m_maxItems(maxItems)
+    : QObject(parent), m_maxItems(maxItems), m_items(0)
+{
+}
+
+RSSFetcher::~RSSFetcher()
 {
-    connect(&m_networkAccessManager, SIGNAL(finished(QNetworkReply*)),
-            SLOT(fetchingFinished(QNetworkReply*)));
 }
 
 void RSSFetcher::fetch(const QUrl &url)
 {
-    QString agentStr = QString("Qt-Creator/%1 (QHttp %2; %3; %4; %5 bit)")
+    QString agentStr = QString::fromLatin1("Qt-Creator/%1 (QHttp %2; %3; %4; %5 bit)")
                     .arg(Core::Constants::IDE_VERSION_LONG).arg(qVersion())
                     .arg(getOsString()).arg(QLocale::system().name())
                     .arg(QSysInfo::WordSize);
     QNetworkRequest req(url);
     req.setRawHeader("User-Agent", agentStr.toLatin1());
-    m_networkAccessManager.get(req);
+    if (m_networkAccessManager.isNull()) {
+        m_networkAccessManager.reset(new QNetworkAccessManager);
+        connect(m_networkAccessManager.data(), SIGNAL(finished(QNetworkReply*)),
+                SLOT(fetchingFinished(QNetworkReply*)));
+    }
+    m_networkAccessManager->get(req);
 }
 
 void RSSFetcher::fetchingFinished(QNetworkReply *reply)
 {
-    bool error = (reply->error() != QNetworkReply::NoError);
+    const bool error = (reply->error() != QNetworkReply::NoError);
     if (!error) {
-        m_xml.addData(reply->readAll());
-        parseXml();
+        parseXml(reply);
         m_items = 0;
     }
     emit finished(error);
     reply->deleteLater();
 }
 
-void RSSFetcher::parseXml()
+RSSFetcher::TagElement RSSFetcher::tagElement(const QStringRef &r)
 {
-    while (!m_xml.atEnd()) {
-        m_xml.readNext();
-        if (m_xml.isStartElement()) {
-            if (m_xml.name() == "item") {
-                m_titleString.clear();
-                m_descriptionString.clear();
-                m_linkString.clear();
+    if (r == QLatin1String("item"))
+        return itemElement;
+    if (r == QLatin1String("title"))
+        return titleElement;
+    if (r == QLatin1String("description"))
+        return descriptionElement;
+    if (r == QLatin1String("link"))
+        return linkElement;
+    return otherElement;
+}
+
+void RSSFetcher::parseXml(QIODevice *device)
+{
+    QXmlStreamReader xmlReader(device);
+
+    TagElement currentTag = otherElement;
+    QString linkString;
+    QString descriptionString;
+    QString titleString;
+
+    while (!xmlReader.atEnd()) {
+        switch (xmlReader.readNext()) {
+        case QXmlStreamReader::StartElement:
+            currentTag = tagElement(xmlReader.name());
+            if (currentTag == itemElement) {
+                titleString.clear();
+                descriptionString.clear();
+                linkString.clear();
             }
-            m_currentTag = m_xml.name().toString();
-        } else if (m_xml.isEndElement()) {
-            if (m_xml.name() == "item") {
+            break;
+            case QXmlStreamReader::EndElement:
+            if (xmlReader.name() == QLatin1String("item")) {
                 m_items++;
                 if (m_items > m_maxItems)
                     return;
-                emit newsItemReady(m_titleString, m_descriptionString, m_linkString);
+                emit newsItemReady(titleString, descriptionString, linkString);
             }
-
-        } else if (m_xml.isCharacters() && !m_xml.isWhitespace()) {
-            if (m_currentTag == "title")
-                m_titleString += m_xml.text().toString();
-            else if (m_currentTag == "description")
-                m_descriptionString += m_xml.text().toString();
-            else if (m_currentTag == "link")
-                m_linkString += m_xml.text().toString();
+            break;
+            case QXmlStreamReader::Characters:
+            if (!xmlReader.isWhitespace()) {
+                switch (currentTag) {
+                case titleElement:
+                    titleString += xmlReader.text().toString();
+                    break;
+                case descriptionElement:
+                    descriptionString += xmlReader.text().toString();
+                    break;
+                case linkElement:
+                    linkString += xmlReader.text().toString();
+                    break;
+                default:
+                    break;
+                }
+            } // !xmlReader.isWhitespace()
+            break;
+            default:
+            break;
         }
     }
-    if (m_xml.error() && m_xml.error() != QXmlStreamReader::PrematureEndOfDocumentError) {
-        qWarning() << "XML ERROR:" << m_xml.lineNumber() << ": " << m_xml.errorString();
+    if (xmlReader.error() && xmlReader.error() != QXmlStreamReader::PrematureEndOfDocumentError) {
+        qWarning() << "XML ERROR:" << xmlReader.lineNumber() << ": " << xmlReader.errorString();
     }
 }
diff --git a/src/plugins/welcome/rssfetcher.h b/src/plugins/welcome/rssfetcher.h
index e046eead0b..db1fba88b6 100644
--- a/src/plugins/welcome/rssfetcher.h
+++ b/src/plugins/welcome/rssfetcher.h
@@ -30,12 +30,14 @@
 #ifndef RSSFETCHER_H
 #define RSSFETCHER_H
 
-#include <QtCore/QXmlStreamReader>
-#include <QtNetwork/QNetworkAccessManager>
+#include <QtCore/QScopedPointer>
+#include <QtCore/QObject>
 
 QT_BEGIN_NAMESPACE
 class QNetworkReply;
+class QNetworkAccessManager;
 class QUrl;
+class QIODevice;
 QT_END_NAMESPACE
 
 namespace Welcome {
@@ -46,6 +48,7 @@ class RSSFetcher : public QObject
     Q_OBJECT
 public:
     explicit RSSFetcher(int maxItems, QObject *parent = 0);
+    virtual ~RSSFetcher();
 
 signals:
     void newsItemReady(const QString& title, const QString& desciption, const QString& url);
@@ -56,17 +59,14 @@ public slots:
     void fetch(const QUrl &url);
 
 private:
-    void parseXml();
+    enum  TagElement { itemElement, titleElement, descriptionElement, linkElement, otherElement };
+    static TagElement tagElement(const QStringRef &);
+    void parseXml(QIODevice *);
 
-    QXmlStreamReader m_xml;
-    QString m_currentTag;
-    QString m_linkString;
-    QString m_descriptionString;
-    QString m_titleString;
+    const int m_maxItems;
 
-    QNetworkAccessManager m_networkAccessManager;
+    QScopedPointer<QNetworkAccessManager> m_networkAccessManager;
     int m_items;
-    int m_maxItems;
 };
 
 } // namespace Welcome
diff --git a/src/plugins/welcome/welcomemode.cpp b/src/plugins/welcome/welcomemode.cpp
index 3831ea9e2a..01afc50316 100644
--- a/src/plugins/welcome/welcomemode.cpp
+++ b/src/plugins/welcome/welcomemode.cpp
@@ -28,54 +28,48 @@
 **************************************************************************/
 
 #include "welcomemode.h"
+#include "ui_welcomemode.h"
+
 #include <extensionsystem/pluginmanager.h>
 
 #include <coreplugin/icore.h>
 #include <coreplugin/coreconstants.h>
 #include <coreplugin/uniqueidmanager.h>
-#include <coreplugin/modemanager.h>
-#include <coreplugin/dialogs/newdialog.h>
 
 #include <utils/styledbar.h>
 #include <utils/welcomemodetreewidget.h>
 #include <utils/iwelcomepage.h>
 
-#include <QtGui/QMouseEvent>
 #include <QtGui/QScrollArea>
-#include <QtGui/QButtonGroup>
 #include <QtGui/QDesktopServices>
 #include <QtGui/QToolButton>
 
 #include <QtCore/QSettings>
-#include <QtCore/QUrl>
 #include <QtCore/QDebug>
+#include <QtCore/QUrl>
 
-#include <cstdlib>
-
-#include "ui_welcomemode.h"
+enum { debug = 0 };
 
 using namespace ExtensionSystem;
-using namespace Utils;
+
+static const char currentPageSettingsKeyC[] = "General/WelcomeTab";
 
 namespace Welcome {
 
 struct WelcomeModePrivate
 {
-    WelcomeModePrivate();
+    typedef QMap<QToolButton*, QWidget*> ToolButtonWidgetMap;
+
+    WelcomeModePrivate() {}
 
     QScrollArea *m_scrollArea;
     QWidget *m_widget;
     QWidget *m_welcomePage;
-    QMap<QAbstractButton*, QWidget*> buttonMap;
+    ToolButtonWidgetMap buttonMap;
     QHBoxLayout * buttonLayout;
     Ui::WelcomeMode ui;
-    int currentTip;
 };
 
-WelcomeModePrivate::WelcomeModePrivate()
-{
-}
-
 // ---  WelcomeMode
 WelcomeMode::WelcomeMode() :
     m_d(new WelcomeModePrivate)
@@ -100,13 +94,12 @@ WelcomeMode::WelcomeMode() :
     connect(pluginManager, SIGNAL(objectAdded(QObject*)), SLOT(welcomePluginAdded(QObject*)));
 
     connect(m_d->ui.feedbackButton, SIGNAL(clicked()), SLOT(slotFeedback()));
-
 }
 
 WelcomeMode::~WelcomeMode()
 {
     QSettings *settings = Core::ICore::instance()->settings();
-    settings->setValue("General/WelcomeTab", m_d->ui.stackedWidget->currentIndex());
+    settings->setValue(QLatin1String(currentPageSettingsKeyC), m_d->ui.stackedWidget->currentIndex());
     delete m_d->m_widget;
     delete m_d;
 }
@@ -143,77 +136,78 @@ QList<int> WelcomeMode::context() const
     return contexts;
 }
 
-bool sortFunction(IWelcomePage * a, IWelcomePage *b)
+bool sortFunction(Utils::IWelcomePage * a, Utils::IWelcomePage *b)
 {
     return a->priority() < b->priority();
 }
 
+// Create a QToolButton for a page
+QToolButton *WelcomeMode::addPageToolButton(Utils::IWelcomePage *plugin, int position)
+{
+    QToolButton *btn = new QToolButton;
+    btn->setCheckable(true);
+    btn->setText(plugin->title());
+    btn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    btn->setAutoExclusive(true);
+    connect (btn, SIGNAL(clicked()), SLOT(showClickedPage()));
+    m_d->buttonMap.insert(btn, plugin->page());
+    if (position >= 0) {
+        m_d->buttonLayout->insertWidget(position, btn);
+    } else {
+        m_d->buttonLayout->addWidget(btn);
+    }
+    return btn;
+}
+
 void WelcomeMode::initPlugins()
 {
     m_d->buttonLayout = new QHBoxLayout(m_d->ui.navFrame);
     m_d->buttonLayout->setMargin(0);
     m_d->buttonLayout->setSpacing(0);
-    delete m_d->ui.stackedWidget->currentWidget();
-    QList<IWelcomePage*> plugins = PluginManager::instance()->getObjects<IWelcomePage>();
+    QList<Utils::IWelcomePage*> plugins = PluginManager::instance()->getObjects<Utils::IWelcomePage>();
     qSort(plugins.begin(), plugins.end(), &sortFunction);
-    foreach (IWelcomePage *plugin, plugins) {
-        QToolButton *btn = new QToolButton;
-        btn->setCheckable(true);
-        btn->setText(plugin->title());
-        btn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
-        btn->setAutoExclusive(true);
-        connect (btn, SIGNAL(clicked()), SLOT(showClickedPage()));
+    foreach (Utils::IWelcomePage *plugin, plugins) {
         m_d->ui.stackedWidget->addWidget(plugin->page());
-        m_d->buttonLayout->addWidget(btn);
-        m_d->buttonMap.insert(btn, plugin->page());
+        addPageToolButton(plugin);
+        if (debug)
+            qDebug() << "WelcomeMode::initPlugins" << plugin->title();
     }
     m_d->buttonLayout->addSpacing(5);
 
     QSettings *settings = Core::ICore::instance()->settings();
-    int tabId = settings->value("General/WelcomeTab", 0).toInt();
+    const int tabId = settings->value(QLatin1String(currentPageSettingsKeyC), 0).toInt();
 
-    int pluginCount = m_d->ui.stackedWidget->count();
-    if (tabId < pluginCount) {
+    const int pluginCount = m_d->ui.stackedWidget->count();
+    if (tabId >= 0 && tabId < pluginCount) {
         m_d->ui.stackedWidget->setCurrentIndex(tabId);
-        QMapIterator<QAbstractButton*, QWidget*> it(m_d->buttonMap);
-        while (it.hasNext())
-            if (it.next().value() == m_d->ui.stackedWidget->currentWidget()) {
-                it.key()->setChecked(true);
-                break;
-            }
+        if (QToolButton *btn = m_d->buttonMap.key(m_d->ui.stackedWidget->currentWidget()))
+            btn->setChecked(true);
     }
-
 }
 
 void WelcomeMode::welcomePluginAdded(QObject *obj)
 {
-    if (IWelcomePage *plugin = qobject_cast<IWelcomePage*>(obj))
-    {
-        QToolButton * btn = new QToolButton;
-        btn->setCheckable(true);
-        btn->setAutoExclusive(true);
-        btn->setText(plugin->title());
-        btn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
-        connect (btn, SIGNAL(clicked()), SLOT(showClickedPage()));
+    if (Utils::IWelcomePage *plugin = qobject_cast<Utils::IWelcomePage*>(obj)) {
         int insertPos = 0;
-        QList<IWelcomePage*> plugins = PluginManager::instance()->getObjects<IWelcomePage>();
-        foreach (IWelcomePage* p, plugins) {
+        foreach (Utils::IWelcomePage* p, PluginManager::instance()->getObjects<Utils::IWelcomePage>()) {
             if (plugin->priority() < p->priority())
                 insertPos++;
             else
                 break;
         }
         m_d->ui.stackedWidget->insertWidget(insertPos, plugin->page());
-        m_d->buttonMap.insert(btn, plugin->page());
-        m_d->buttonLayout->insertWidget(insertPos, btn);
+        addPageToolButton(plugin, insertPos);
+        if (debug)
+            qDebug() << "welcomePluginAdded" << plugin->title() << "at" << insertPos
+                     << " of " << m_d->buttonMap.size();
     }
 }
 
 void WelcomeMode::showClickedPage()
 {
-    QAbstractButton *btn = qobject_cast<QAbstractButton*>(sender());
-    QMap<QAbstractButton*, QWidget*>::iterator it = m_d->buttonMap.find(btn);
-    if (it.value())
+    QToolButton *btn = qobject_cast<QToolButton*>(sender());
+    const WelcomeModePrivate::ToolButtonWidgetMap::const_iterator it = m_d->buttonMap.constFind(btn);
+    if (it != m_d->buttonMap.constEnd())
         m_d->ui.stackedWidget->setCurrentWidget(it.value());
 }
 
@@ -223,5 +217,4 @@ void WelcomeMode::slotFeedback()
         "http://qt.nokia.com/forms/feedback-forms/qt-creator-user-feedback/view")));
 }
 
-
 } // namespace Welcome
diff --git a/src/plugins/welcome/welcomemode.h b/src/plugins/welcome/welcomemode.h
index 73f8d18add..3779bf434b 100644
--- a/src/plugins/welcome/welcomemode.h
+++ b/src/plugins/welcome/welcomemode.h
@@ -34,12 +34,14 @@
 
 #include <coreplugin/imode.h>
 
-
 QT_BEGIN_NAMESPACE
 class QWidget;
-class QUrl;
+class QToolButton;
 QT_END_NAMESPACE
 
+namespace Utils {
+    class IWelcomePage;
+}
 namespace Welcome {
 
 struct WelcomeModePrivate;
@@ -69,6 +71,8 @@ private slots:
     void showClickedPage();
 
 private:
+    QToolButton *addPageToolButton(Utils::IWelcomePage *plugin, int position = -1);
+
     WelcomeModePrivate *m_d;
 };
 
diff --git a/src/plugins/welcome/welcomemode.ui b/src/plugins/welcome/welcomemode.ui
index ae3fd53c5f..648ed84029 100644
--- a/src/plugins/welcome/welcomemode.ui
+++ b/src/plugins/welcome/welcomemode.ui
@@ -249,18 +249,8 @@ QToolButton:pressed {
          <item>
           <widget class="QStackedWidget" name="stackedWidget">
            <property name="currentIndex">
-            <number>0</number>
+            <number>-1</number>
            </property>
-           <widget class="QWidget" name="widget">
-            <layout class="QGridLayout" name="gridLayout_7">
-             <property name="margin">
-              <number>18</number>
-             </property>
-             <property name="spacing">
-              <number>24</number>
-             </property>
-            </layout>
-           </widget>
           </widget>
          </item>
          <item>
diff --git a/src/plugins/welcome/welcomeplugin.cpp b/src/plugins/welcome/welcomeplugin.cpp
index 499a0308b8..2056807980 100644
--- a/src/plugins/welcome/welcomeplugin.cpp
+++ b/src/plugins/welcome/welcomeplugin.cpp
@@ -28,42 +28,22 @@
 **************************************************************************/
 
 #include "welcomeplugin.h"
-
 #include "welcomemode.h"
-
 #include "communitywelcomepage.h"
 
-#include <coreplugin/actionmanager/actionmanager.h>
-#include <coreplugin/basemode.h>
-#include <coreplugin/coreconstants.h>
-#include <coreplugin/icore.h>
 #include <coreplugin/modemanager.h>
-#include <coreplugin/uniqueidmanager.h>
 
-#include <QtCore/QDebug>
 #include <QtCore/QtPlugin>
-#include <QtGui/QAction>
-#include <QtGui/QMenu>
-#include <QtGui/QMessageBox>
-#include <QtGui/QPushButton>
 
 using namespace Welcome::Internal;
 
 WelcomePlugin::WelcomePlugin()
-  : m_welcomeMode(0), m_communityWelcomePage(0)
+  : m_welcomeMode(0)
 {
 }
 
 WelcomePlugin::~WelcomePlugin()
 {
-    if (m_welcomeMode) {
-        removeObject(m_welcomeMode);
-        delete m_welcomeMode;
-    }
-    if (m_communityWelcomePage) {
-        removeObject(m_communityWelcomePage);
-        delete m_communityWelcomePage;
-    }
 }
 
 /*! Initializes the plugin. Returns true on success.
@@ -77,11 +57,10 @@ bool WelcomePlugin::initialize(const QStringList &arguments, QString *error_mess
     Q_UNUSED(arguments)
     Q_UNUSED(error_message)
 
-    m_communityWelcomePage = new Internal::CommunityWelcomePage;
-    addObject(m_communityWelcomePage);
+    addAutoReleasedObject(new Internal::CommunityWelcomePage);
 
     m_welcomeMode = new WelcomeMode;
-    addObject(m_welcomeMode);
+    addAutoReleasedObject(m_welcomeMode);
 
     return true;
 }
diff --git a/src/plugins/welcome/welcomeplugin.h b/src/plugins/welcome/welcomeplugin.h
index 950cc43d96..1095e5ec8e 100644
--- a/src/plugins/welcome/welcomeplugin.h
+++ b/src/plugins/welcome/welcomeplugin.h
@@ -33,28 +33,23 @@
 #include <extensionsystem/iplugin.h>
 
 namespace Welcome {
-
 class WelcomeMode;
 
 namespace Internal {
-class CommunityWelcomePage;
 
-class WelcomePlugin
-  : public ExtensionSystem::IPlugin
+class WelcomePlugin : public ExtensionSystem::IPlugin
 {
     Q_OBJECT
-
 public:
     WelcomePlugin();
-    ~WelcomePlugin();
+    virtual ~WelcomePlugin();
 
-    bool initialize(const QStringList &arguments, QString *error_message);
+    virtual bool initialize(const QStringList &arguments, QString *error_message);
 
-    void extensionsInitialized();
+    virtual void extensionsInitialized();
 
 private:
     WelcomeMode *m_welcomeMode;
-    Internal::CommunityWelcomePage *m_communityWelcomePage;
 };
 
 } // namespace Welcome