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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 786 insertions, 0 deletions

diff --git a/src/designer/src/lib/shared/pluginmanager.cpp b/src/designer/src/lib/shared/pluginmanager.cpp
new file mode 100644
index 000000000..918fe7d07
--- /dev/null
+++ b/src/designer/src/lib/shared/pluginmanager.cpp
@@ -0,0 +1,786 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "pluginmanager_p.h"
+#include "qdesigner_utils_p.h"
+#include "qdesigner_qsettings_p.h"
+
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerCustomWidgetInterface>
+#include <QtDesigner/QExtensionManager>
+#include <QtDesigner/QDesignerLanguageExtension>
+
+#include <QtCore/QDir>
+#include <QtCore/QFile>
+#include <QtCore/QFileInfo>
+#include <QtCore/QSet>
+#include <QtCore/QPluginLoader>
+#include <QtCore/QLibrary>
+#include <QtCore/QLibraryInfo>
+#include <QtCore/qdebug.h>
+#include <QtCore/QMap>
+#include <QtCore/QSettings>
+#include <QtCore/QCoreApplication>
+
+#include <QtCore/QXmlStreamReader>
+#include <QtCore/QXmlStreamAttributes>
+#include <QtCore/QXmlStreamAttribute>
+
+static const char *uiElementC = "ui";
+static const char *languageAttributeC = "language";
+static const char *widgetElementC = "widget";
+static const char *displayNameAttributeC = "displayname";
+static const char *classAttributeC = "class";
+static const char *customwidgetElementC = "customwidget";
+static const char *extendsElementC = "extends";
+static const char *addPageMethodC = "addpagemethod";
+static const char *propertySpecsC = "propertyspecifications";
+static const char *stringPropertySpecC = "stringpropertyspecification";
+static const char *stringPropertyNameAttrC = "name";
+static const char *stringPropertyTypeAttrC = "type";
+static const char *stringPropertyNoTrAttrC = "notr";
+static const char *jambiLanguageC = "jambi";
+
+enum { debugPluginManager = 0 };
+
+/* Custom widgets: Loading custom widgets is a 2-step process: PluginManager
+ * scans for its plugins in the constructor. At this point, it might not be safe
+ * to immediately initialize the custom widgets it finds, because the rest of
+ * Designer is not initialized yet.
+ * Later on, in ensureInitialized(), the plugin instances (including static ones)
+ * are iterated and the custom widget plugins are initialized and added to internal
+ * list of custom widgets and parsed data. Should there be a parse error or a language
+ * mismatch, it kicks out the respective custom widget. The m_initialized flag
+ * is used to indicate the state.
+ * Later, someone might call registerNewPlugins(), which agains clears the flag via
+ * registerPlugin() and triggers the process again.
+ * Also note that Jambi fakes a custom widget collection that changes its contents
+ * every time the project is switched. So, custom widget plugins can actually
+ * disappear, and the custom widget list must be cleared and refilled in
+ * ensureInitialized() after registerNewPlugins. */
+
+QT_BEGIN_NAMESPACE
+
+static QStringList unique(const QStringList &lst)
+{
+    const QSet<QString> s = QSet<QString>::fromList(lst);
+    return s.toList();
+}
+
+QStringList QDesignerPluginManager::defaultPluginPaths()
+{
+    QStringList result;
+
+    const QStringList path_list = QCoreApplication::libraryPaths();
+
+    const QString designer = QLatin1String("designer");
+    foreach (const QString &path, path_list) {
+        QString libPath = path;
+        libPath += QDir::separator();
+        libPath += designer;
+        result.append(libPath);
+    }
+
+    QString homeLibPath = QDir::homePath();
+    homeLibPath += QDir::separator();
+    homeLibPath += QLatin1String(".designer");
+    homeLibPath += QDir::separator();
+    homeLibPath += QLatin1String("plugins");
+
+    result.append(homeLibPath);
+    return result;
+}
+
+// Figure out the language designer is running. ToDo: Introduce some
+// Language name API to QDesignerLanguageExtension?
+
+static inline QString getDesignerLanguage(QDesignerFormEditorInterface *core)
+{
+    if (QDesignerLanguageExtension *lang = qt_extension<QDesignerLanguageExtension *>(core->extensionManager(), core)) {
+        if (lang->uiExtension() == QLatin1String("jui"))
+            return QLatin1String(jambiLanguageC);
+        return QLatin1String("unknown");
+    }
+    return QLatin1String("c++");
+}
+
+// ----------------  QDesignerCustomWidgetSharedData
+
+class QDesignerCustomWidgetSharedData : public QSharedData {
+public:
+    // Type of a string property
+    typedef QPair<qdesigner_internal::TextPropertyValidationMode, bool> StringPropertyType;
+    typedef QHash<QString, StringPropertyType> StringPropertyTypeMap;
+
+    explicit QDesignerCustomWidgetSharedData(const QString &thePluginPath) : pluginPath(thePluginPath) {}
+    void clearXML();
+
+    QString pluginPath;
+
+    QString xmlClassName;
+    QString xmlDisplayName;
+    QString xmlLanguage;
+    QString xmlAddPageMethod;
+    QString xmlExtends;
+
+    StringPropertyTypeMap xmlStringPropertyTypeMap;
+};
+
+void QDesignerCustomWidgetSharedData::clearXML()
+{
+    xmlClassName.clear();
+    xmlDisplayName.clear();
+    xmlLanguage.clear();
+    xmlAddPageMethod.clear();
+    xmlExtends.clear();
+    xmlStringPropertyTypeMap.clear();
+}
+
+// ----------------  QDesignerCustomWidgetData
+
+QDesignerCustomWidgetData::QDesignerCustomWidgetData(const QString &pluginPath) :
+    m_d(new QDesignerCustomWidgetSharedData(pluginPath))
+{
+}
+
+QDesignerCustomWidgetData::QDesignerCustomWidgetData(const QDesignerCustomWidgetData &o) :
+     m_d(o.m_d)
+{
+}
+
+QDesignerCustomWidgetData& QDesignerCustomWidgetData::operator=(const QDesignerCustomWidgetData &o)
+{
+    m_d.operator=(o.m_d);
+    return *this;
+}
+
+QDesignerCustomWidgetData::~QDesignerCustomWidgetData()
+{
+}
+
+bool QDesignerCustomWidgetData::isNull() const
+{
+    return m_d->xmlClassName.isEmpty() || m_d->pluginPath.isEmpty();
+}
+
+QString QDesignerCustomWidgetData::xmlClassName() const
+{
+    return m_d->xmlClassName;
+}
+
+QString QDesignerCustomWidgetData::xmlLanguage() const
+{
+    return m_d->xmlLanguage;
+}
+
+QString QDesignerCustomWidgetData::xmlAddPageMethod() const
+{
+    return m_d->xmlAddPageMethod;
+}
+
+QString QDesignerCustomWidgetData::xmlExtends() const
+{
+    return m_d->xmlExtends;
+}
+
+QString QDesignerCustomWidgetData::xmlDisplayName() const
+{
+    return m_d->xmlDisplayName;
+}
+
+QString QDesignerCustomWidgetData::pluginPath() const
+{
+    return m_d->pluginPath;
+}
+
+bool QDesignerCustomWidgetData::xmlStringPropertyType(const QString &name, StringPropertyType *type) const
+{
+    QDesignerCustomWidgetSharedData::StringPropertyTypeMap::const_iterator it = m_d->xmlStringPropertyTypeMap.constFind(name);
+    if (it == m_d->xmlStringPropertyTypeMap.constEnd()) {
+        *type = StringPropertyType(qdesigner_internal::ValidationRichText, true);
+        return false;
+    }
+    *type = it.value();
+    return true;
+}
+
+// Wind a QXmlStreamReader  until it finds an element. Returns index or one of FindResult
+enum FindResult { FindError = -2, ElementNotFound = -1 };
+
+static int findElement(const QStringList &desiredElts, QXmlStreamReader &sr)
+{
+    while (true) {
+        switch(sr.readNext()) {
+        case QXmlStreamReader::EndDocument:
+            return ElementNotFound;
+        case QXmlStreamReader::Invalid:
+            return FindError;
+        case QXmlStreamReader::StartElement: {
+            const int index = desiredElts.indexOf(sr.name().toString().toLower());
+            if (index >= 0)
+                return index;
+        }
+            break;
+        default:
+            break;
+        }
+    }
+    return FindError;
+}
+
+static inline QString msgXmlError(const QString &name, const QString &errorMessage)
+{
+    return QDesignerPluginManager::tr("An XML error was encountered when parsing the XML of the custom widget %1: %2").arg(name, errorMessage);
+}
+
+static inline QString msgAttributeMissing(const QString &name)
+{
+    return QDesignerPluginManager::tr("A required attribute ('%1') is missing.").arg(name);
+}
+
+static qdesigner_internal::TextPropertyValidationMode typeStringToType(const QString &v, bool *ok)
+{
+    *ok = true;
+    if (v  == QLatin1String("multiline"))
+        return qdesigner_internal::ValidationMultiLine;
+    if (v  == QLatin1String("richtext"))
+        return qdesigner_internal::ValidationRichText;
+    if (v  == QLatin1String("stylesheet"))
+        return qdesigner_internal::ValidationStyleSheet;
+    if (v  == QLatin1String("singleline"))
+        return qdesigner_internal::ValidationSingleLine;
+    if (v  == QLatin1String("objectname"))
+        return qdesigner_internal::ValidationObjectName;
+    if (v  == QLatin1String("objectnamescope"))
+        return qdesigner_internal::ValidationObjectNameScope;
+    if (v  == QLatin1String("url"))
+        return qdesigner_internal::ValidationURL;
+    *ok = false;
+    return qdesigner_internal::ValidationRichText;
+}
+
+static  bool parsePropertySpecs(QXmlStreamReader &sr,
+                                   QDesignerCustomWidgetSharedData::StringPropertyTypeMap *rc,
+                                   QString *errorMessage)
+{
+    const QString propertySpecs = QLatin1String(propertySpecsC);
+    const QString stringPropertySpec = QLatin1String(stringPropertySpecC);
+    const QString stringPropertyTypeAttr = QLatin1String(stringPropertyTypeAttrC);
+    const QString stringPropertyNoTrAttr = QLatin1String(stringPropertyNoTrAttrC);
+    const QString stringPropertyNameAttr = QLatin1String(stringPropertyNameAttrC);
+
+    while (!sr.atEnd()) {
+        switch(sr.readNext()) {
+        case QXmlStreamReader::StartElement: {
+            if (sr.name() != stringPropertySpec) {
+                *errorMessage = QDesignerPluginManager::tr("An invalid property specification ('%1') was encountered. Supported types: %2").arg(sr.name().toString(), stringPropertySpec);
+                return false;
+            }
+            const QXmlStreamAttributes atts = sr.attributes();
+            const QString name = atts.value(stringPropertyNameAttr).toString();
+            const QString type = atts.value(stringPropertyTypeAttr).toString();
+            const QString notrS = atts.value(stringPropertyNoTrAttr).toString(); //Optional
+
+            if (type.isEmpty()) {
+                *errorMessage = msgAttributeMissing(stringPropertyTypeAttr);
+                return false;
+            }
+            if (name.isEmpty()) {
+                *errorMessage = msgAttributeMissing(stringPropertyNameAttr);
+                return false;
+            }
+            bool typeOk;
+            const bool noTr = notrS == QLatin1String("true") || notrS == QLatin1String("1");
+            QDesignerCustomWidgetSharedData::StringPropertyType v(typeStringToType(type, &typeOk), !noTr);
+            if (!typeOk) {
+                *errorMessage = QDesignerPluginManager::tr("'%1' is not a valid string property specification.").arg(type);
+                return false;
+            }
+            rc->insert(name, v);
+        }
+            break;
+        case QXmlStreamReader::EndElement: // Outer </stringproperties>
+            if (sr.name() == propertySpecs)
+                return true;
+        default:
+            break;
+        }
+    }
+    return true;
+}
+
+QDesignerCustomWidgetData::ParseResult
+                       QDesignerCustomWidgetData::parseXml(const QString &xml, const QString &name, QString *errorMessage)
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO << name;
+
+    QDesignerCustomWidgetSharedData &data =  *m_d;
+    data.clearXML();
+
+    QXmlStreamReader sr(xml);
+
+    bool foundUI = false;
+    bool foundWidget = false;
+    ParseResult rc = ParseOk;
+    // Parse for the (optional) <ui> or the first <widget> element
+    QStringList elements;
+    elements.push_back(QLatin1String(uiElementC));
+    elements.push_back(QLatin1String(widgetElementC));
+    for (int i = 0; i < 2 && !foundWidget; i++) {
+        switch (findElement(elements, sr)) {
+        case FindError:
+            *errorMessage = msgXmlError(name, sr.errorString());
+            return ParseError;
+        case ElementNotFound:
+            *errorMessage = QDesignerPluginManager::tr("The XML of the custom widget %1 does not contain any of the elements <widget> or <ui>.").arg(name);
+            return ParseError;
+        case 0: { // <ui>
+            const QXmlStreamAttributes attributes = sr.attributes();
+            data.xmlLanguage = attributes.value(QLatin1String(languageAttributeC)).toString();
+            data.xmlDisplayName = attributes.value(QLatin1String(displayNameAttributeC)).toString();
+            foundUI = true;
+        }
+            break;
+        case 1: // <widget>: Do some sanity checks
+            data.xmlClassName = sr.attributes().value(QLatin1String(classAttributeC)).toString();
+            if (data.xmlClassName.isEmpty()) {
+                *errorMessage = QDesignerPluginManager::tr("The class attribute for the class %1 is missing.").arg(name);
+                rc = ParseWarning;
+            } else {
+                if (data.xmlClassName != name) {
+                    *errorMessage = QDesignerPluginManager::tr("The class attribute for the class %1 does not match the class name %2.").arg(data.xmlClassName, name);
+                    rc = ParseWarning;
+                }
+            }
+            foundWidget = true;
+            break;
+        }
+    }
+    // Parse out the <customwidget> element which might be present if  <ui> was there
+    if (!foundUI)
+        return rc;
+    elements.clear();
+    elements.push_back(QLatin1String(customwidgetElementC));
+    switch (findElement(elements, sr)) {
+    case FindError:
+        *errorMessage = msgXmlError(name, sr.errorString());
+        return ParseError;
+    case ElementNotFound:
+        return rc;
+    default:
+        break;
+    }
+    // Find <extends>, <addPageMethod>, <stringproperties>
+    elements.clear();
+    elements.push_back(QLatin1String(extendsElementC));
+    elements.push_back(QLatin1String(addPageMethodC));
+    elements.push_back(QLatin1String(propertySpecsC));
+    while (true) {
+        switch (findElement(elements, sr)) {
+        case FindError:
+            *errorMessage = msgXmlError(name, sr.errorString());
+            return ParseError;
+        case ElementNotFound:
+            return rc;
+        case 0: // <extends>
+            data.xmlExtends = sr.readElementText();
+            if (sr.tokenType() != QXmlStreamReader::EndElement) {
+                *errorMessage = msgXmlError(name, sr.errorString());
+                return ParseError;
+            }
+            break;
+        case 1: // <addPageMethod>
+            data.xmlAddPageMethod = sr.readElementText();
+            if (sr.tokenType() != QXmlStreamReader::EndElement) {
+                *errorMessage = msgXmlError(name, sr.errorString());
+                return ParseError;
+            }
+            break;
+        case 2: // <stringproperties>
+            if (!parsePropertySpecs(sr, &m_d->xmlStringPropertyTypeMap, errorMessage)) {
+                *errorMessage = msgXmlError(name, *errorMessage);
+                return ParseError;
+            }
+            break;
+        }
+    }
+    return rc;
+}
+
+// ---------------- QDesignerPluginManagerPrivate
+
+class QDesignerPluginManagerPrivate {
+    public:
+    typedef QPair<QString, QString> ClassNamePropertyNameKey;
+
+    QDesignerPluginManagerPrivate(QDesignerFormEditorInterface *core);
+
+    void clearCustomWidgets();
+    bool addCustomWidget(QDesignerCustomWidgetInterface *c,
+                         const QString &pluginPath,
+                         const QString &designerLanguage);
+    void addCustomWidgets(const QObject *o,
+                          const QString &pluginPath,
+                          const QString &designerLanguage);
+
+    QDesignerFormEditorInterface *m_core;
+    QStringList m_pluginPaths;
+    QStringList m_registeredPlugins;
+    // TODO: QPluginLoader also caches invalid plugins -> This seems to be dead code
+    QStringList m_disabledPlugins;
+
+    typedef QMap<QString, QString> FailedPluginMap;
+    FailedPluginMap m_failedPlugins;
+
+    // Synced lists of custom widgets and their data. Note that the list
+    // must be ordered for collections to appear in order.
+    QList<QDesignerCustomWidgetInterface *> m_customWidgets;
+    QList<QDesignerCustomWidgetData> m_customWidgetData;
+
+    QStringList defaultPluginPaths() const;
+
+    bool m_initialized;
+};
+
+QDesignerPluginManagerPrivate::QDesignerPluginManagerPrivate(QDesignerFormEditorInterface *core) :
+   m_core(core),
+   m_initialized(false)
+{
+}
+
+void QDesignerPluginManagerPrivate::clearCustomWidgets()
+{
+    m_customWidgets.clear();
+    m_customWidgetData.clear();
+}
+
+// Add a custom widget to the list if it parses correctly
+// and is of the right language
+bool QDesignerPluginManagerPrivate::addCustomWidget(QDesignerCustomWidgetInterface *c,
+                                                    const QString &pluginPath,
+                                                    const QString &designerLanguage)
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO << c->name();
+
+    if (!c->isInitialized())
+        c->initialize(m_core);
+    // Parse the XML even if the plugin is initialized as Jambi might play tricks here
+    QDesignerCustomWidgetData data(pluginPath);
+    const QString domXml = c->domXml();
+    if (!domXml.isEmpty()) { // Legacy: Empty XML means: Do not show up in widget box.
+        QString errorMessage;
+        const QDesignerCustomWidgetData::ParseResult pr = data.parseXml(domXml, c->name(), &errorMessage);
+        switch (pr) {
+            case QDesignerCustomWidgetData::ParseOk:
+            break;
+            case QDesignerCustomWidgetData::ParseWarning:
+            qdesigner_internal::designerWarning(errorMessage);
+            break;
+            case QDesignerCustomWidgetData::ParseError:
+            qdesigner_internal::designerWarning(errorMessage);
+            return false;
+        }
+        // Does the language match?
+        const QString pluginLanguage = data.xmlLanguage();
+        if (!pluginLanguage.isEmpty() && pluginLanguage.compare(designerLanguage, Qt::CaseInsensitive))
+            return false;
+    }
+    m_customWidgets.push_back(c);
+    m_customWidgetData.push_back(data);
+    return true;
+}
+
+// Check the plugin interface for either a custom widget or a collection and
+// add all contained custom widgets.
+void QDesignerPluginManagerPrivate::addCustomWidgets(const QObject *o,
+                                                     const QString &pluginPath,
+                                                     const QString &designerLanguage)
+{
+    if (QDesignerCustomWidgetInterface *c = qobject_cast<QDesignerCustomWidgetInterface*>(o)) {
+        addCustomWidget(c, pluginPath, designerLanguage);
+        return;
+    }
+    if (const QDesignerCustomWidgetCollectionInterface *coll = qobject_cast<QDesignerCustomWidgetCollectionInterface*>(o)) {
+        foreach(QDesignerCustomWidgetInterface *c, coll->customWidgets())
+            addCustomWidget(c, pluginPath, designerLanguage);
+    }
+}
+
+
+// ---------------- QDesignerPluginManager
+// As of 4.4, the header will be distributed with the Eclipse plugin.
+
+QDesignerPluginManager::QDesignerPluginManager(QDesignerFormEditorInterface *core) :
+    QObject(core),
+    m_d(new QDesignerPluginManagerPrivate(core))
+{
+    m_d->m_pluginPaths = defaultPluginPaths();
+    const QSettings settings(qApp->organizationName(), QDesignerQSettings::settingsApplicationName());
+    m_d->m_disabledPlugins = unique(settings.value(QLatin1String("PluginManager/DisabledPlugins")).toStringList());
+
+    // Register plugins
+    updateRegisteredPlugins();
+
+    if (debugPluginManager)
+        qDebug() << "QDesignerPluginManager::disabled: " <<  m_d->m_disabledPlugins << " static " << m_d->m_customWidgets.size();
+}
+
+QDesignerPluginManager::~QDesignerPluginManager()
+{
+    syncSettings();
+    delete m_d;
+}
+
+QDesignerFormEditorInterface *QDesignerPluginManager::core() const
+{
+    return m_d->m_core;
+}
+
+QStringList QDesignerPluginManager::findPlugins(const QString &path)
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO << path;
+    const QDir dir(path);
+    if (!dir.exists())
+        return QStringList();
+
+    const QFileInfoList infoList = dir.entryInfoList(QDir::Files);
+    if (infoList.empty())
+        return QStringList();
+
+    // Load symbolic links but make sure all file names are unique as not
+    // to fall for something like 'libplugin.so.1 -> libplugin.so'
+    QStringList result;
+    const QFileInfoList::const_iterator icend = infoList.constEnd();
+    for (QFileInfoList::const_iterator it = infoList.constBegin(); it != icend; ++it) {
+        QString fileName;
+        if (it->isSymLink()) {
+            const QFileInfo linkTarget = QFileInfo(it->symLinkTarget());
+            if (linkTarget.exists() && linkTarget.isFile())
+                fileName = linkTarget.absoluteFilePath();
+        } else {
+            fileName = it->absoluteFilePath();
+        }
+        if (!fileName.isEmpty() && QLibrary::isLibrary(fileName) && !result.contains(fileName))
+            result += fileName;
+    }
+    return result;
+}
+
+void QDesignerPluginManager::setDisabledPlugins(const QStringList &disabled_plugins)
+{
+    m_d->m_disabledPlugins = disabled_plugins;
+    updateRegisteredPlugins();
+}
+
+void QDesignerPluginManager::setPluginPaths(const QStringList &plugin_paths)
+{
+    m_d->m_pluginPaths = plugin_paths;
+    updateRegisteredPlugins();
+}
+
+QStringList QDesignerPluginManager::disabledPlugins() const
+{
+    return m_d->m_disabledPlugins;
+}
+
+QStringList QDesignerPluginManager::failedPlugins() const
+{
+    return m_d->m_failedPlugins.keys();
+}
+
+QString QDesignerPluginManager::failureReason(const QString &pluginName) const
+{
+    return m_d->m_failedPlugins.value(pluginName);
+}
+
+QStringList QDesignerPluginManager::registeredPlugins() const
+{
+    return m_d->m_registeredPlugins;
+}
+
+QStringList QDesignerPluginManager::pluginPaths() const
+{
+    return m_d->m_pluginPaths;
+}
+
+QObject *QDesignerPluginManager::instance(const QString &plugin) const
+{
+    if (m_d->m_disabledPlugins.contains(plugin))
+        return 0;
+
+    QPluginLoader loader(plugin);
+    return loader.instance();
+}
+
+void QDesignerPluginManager::updateRegisteredPlugins()
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO;
+    m_d->m_registeredPlugins.clear();
+    foreach (const QString &path,  m_d->m_pluginPaths)
+        registerPath(path);
+}
+
+bool QDesignerPluginManager::registerNewPlugins()
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO;
+
+    const int before = m_d->m_registeredPlugins.size();
+    foreach (const QString &path, m_d->m_pluginPaths)
+        registerPath(path);
+    const bool newPluginsFound = m_d->m_registeredPlugins.size() > before;
+    // We force a re-initialize as Jambi collection might return
+    // different widget lists when switching projects.
+    m_d->m_initialized = false;
+    ensureInitialized();
+
+    return newPluginsFound;
+}
+
+void QDesignerPluginManager::registerPath(const QString &path)
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO << path;
+    QStringList candidates = findPlugins(path);
+
+    foreach (const QString &plugin, candidates)
+        registerPlugin(plugin);
+}
+
+void QDesignerPluginManager::registerPlugin(const QString &plugin)
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO << plugin;
+    if (m_d->m_disabledPlugins.contains(plugin))
+        return;
+    if (m_d->m_registeredPlugins.contains(plugin))
+        return;
+
+    QPluginLoader loader(plugin);
+    if (loader.isLoaded() || loader.load()) {
+        m_d->m_registeredPlugins += plugin;
+        QDesignerPluginManagerPrivate::FailedPluginMap::iterator fit = m_d->m_failedPlugins.find(plugin);
+        if (fit != m_d->m_failedPlugins.end())
+            m_d->m_failedPlugins.erase(fit);
+        return;
+    }
+
+    const QString errorMessage = loader.errorString();
+    m_d->m_failedPlugins.insert(plugin, errorMessage);
+}
+
+
+
+bool QDesignerPluginManager::syncSettings()
+{
+    QSettings settings(qApp->organizationName(), QDesignerQSettings::settingsApplicationName());
+    settings.beginGroup(QLatin1String("PluginManager"));
+    settings.setValue(QLatin1String("DisabledPlugins"), m_d->m_disabledPlugins);
+    settings.endGroup();
+    return settings.status() == QSettings::NoError;
+}
+
+void QDesignerPluginManager::ensureInitialized()
+{
+    if (debugPluginManager)
+        qDebug() << Q_FUNC_INFO <<  m_d->m_initialized << m_d->m_customWidgets.size();
+
+    if (m_d->m_initialized)
+        return;
+
+    const QString designerLanguage = getDesignerLanguage(m_d->m_core);
+
+    m_d->clearCustomWidgets();
+    // Add the static custom widgets
+    const QObjectList staticPluginObjects = QPluginLoader::staticInstances();
+    if (!staticPluginObjects.empty()) {
+        const QString staticPluginPath = QCoreApplication::applicationFilePath();
+        foreach(QObject *o, staticPluginObjects)
+            m_d->addCustomWidgets(o, staticPluginPath, designerLanguage);
+    }
+    foreach (const QString &plugin, m_d->m_registeredPlugins)
+        if (QObject *o = instance(plugin))
+            m_d->addCustomWidgets(o, plugin, designerLanguage);
+
+    m_d->m_initialized = true;
+}
+
+QDesignerPluginManager::CustomWidgetList QDesignerPluginManager::registeredCustomWidgets() const
+{
+    const_cast<QDesignerPluginManager*>(this)->ensureInitialized();
+    return m_d->m_customWidgets;
+}
+
+QDesignerCustomWidgetData QDesignerPluginManager::customWidgetData(QDesignerCustomWidgetInterface *w) const
+{
+    const int index = m_d->m_customWidgets.indexOf(w);
+    if (index == -1)
+        return QDesignerCustomWidgetData();
+    return m_d->m_customWidgetData.at(index);
+}
+
+QDesignerCustomWidgetData QDesignerPluginManager::customWidgetData(const QString &name) const
+{
+    const int count = m_d->m_customWidgets.size();
+    for (int i = 0; i < count; i++)
+        if (m_d->m_customWidgets.at(i)->name() == name)
+            return m_d->m_customWidgetData.at(i);
+    return QDesignerCustomWidgetData();
+}
+
+QObjectList QDesignerPluginManager::instances() const
+{
+    QStringList plugins = registeredPlugins();
+
+    QObjectList lst;
+    foreach (const QString &plugin, plugins) {
+        if (QObject *o = instance(plugin))
+            lst.append(o);
+    }
+
+    return lst;
+}
+
+QT_END_NAMESPACE