qdesigner_promotion.cpp

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#include "qdesigner_promotion_p.h"
#include "widgetdatabase_p.h"
#include "metadatabase_p.h"
#include "widgetdatabase_p.h"

#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QDesignerFormWindowManagerInterface>
#include <QtDesigner/QDesignerObjectInspectorInterface>
#include <QtDesigner/QDesignerWidgetBoxInterface>
#include <QtDesigner/QDesignerWidgetDataBaseInterface>

#include <QtCore/QMap>
#include <QtCore/QCoreApplication>
#include <qdebug.h>

namespace {
    // Return a set of on-promotable classes
    const QSet<QString> &nonPromotableClasses() {
        static QSet<QString> rc;
        if (rc.empty()) {
            rc.insert(QLatin1String("Line"));
            rc.insert(QLatin1String("QAction"));
            rc.insert(QLatin1String("Spacer"));
            rc.insert(QLatin1String("QMainWindow"));
            rc.insert(QLatin1String("QDialog"));
            rc.insert(QLatin1String("QStatusBar"));
            rc.insert(QLatin1String("QToolBar"));
            rc.insert(QLatin1String("QWorkspace"));
            rc.insert(QLatin1String("QMdiArea"));
            rc.insert(QLatin1String("QMdiSubWindow"));
        }
        return rc;
    }

    // Return widget database index of a promoted class or -1 with error message
    int promotedWidgetDataBaseIndex(const QDesignerWidgetDataBaseInterface *widgetDataBase,
                                                                 const QString &className,
                                                                 QString *errorMessage) {
        const int index = widgetDataBase->indexOfClassName(className);
        if (index == -1 || !widgetDataBase->item(index)->isPromoted()) {
            *errorMessage = QCoreApplication::tr("%1 is not a promoted class.").arg(className);
            return -1;
        }
        return index;
    }

    // Return widget database item of a promoted class or 0 with error message
    QDesignerWidgetDataBaseItemInterface *promotedWidgetDataBaseItem(const QDesignerWidgetDataBaseInterface *widgetDataBase,
                                                                     const QString &className,
                                                                     QString *errorMessage) {

        const int index =  promotedWidgetDataBaseIndex(widgetDataBase, className, errorMessage);
        if (index == -1)
            return 0;
        return widgetDataBase->item(index);
    }

    // extract class name from xml  "<widget class="QWidget" ...>". Quite a hack.
    QString classNameFromXml(QString xml) {
        static const QString tag = QLatin1String("class=\"");
        const int pos = xml.indexOf(tag);
        if (pos == -1)
            return QString();
        xml.remove(0, pos + tag.size());
        const int closingPos = xml.indexOf(QLatin1Char('"'));
        if (closingPos == -1)
            return QString();
        xml.remove(closingPos, xml.size() - closingPos);
        return xml;
    }

    // return a list of class names in the scratch pad
    QStringList getScratchPadClasses(const QDesignerWidgetBoxInterface *wb) {
        QStringList rc;
        const int catCount =  wb->categoryCount();
        for (int c = 0; c <  catCount; c++) {
            const QDesignerWidgetBoxInterface::Category category = wb->category(c);
            if (category.type() == QDesignerWidgetBoxInterface::Category::Scratchpad) {
                const int widgetCount = category.widgetCount();
                for (int w = 0; w < widgetCount; w++) {
                    const QString className = classNameFromXml( category.widget(w).domXml());
                    if (!className.isEmpty())
                        rc += className;
                }
            }
        }
        return rc;
    }
}

namespace qdesigner_internal {

    QDesignerPromotion::QDesignerPromotion(QDesignerFormEditorInterface *core) :
        m_core(core)  {
    }

    bool  QDesignerPromotion::addPromotedClass(const QString &baseClass,
                                               const QString &className,
                                               const QString &includeFile,
                                               QString *errorMessage)
    {
        QDesignerWidgetDataBaseInterface *widgetDataBase = m_core->widgetDataBase();
        const int baseClassIndex = widgetDataBase->indexOfClassName(baseClass);

        if (baseClassIndex == -1) {
            *errorMessage = QCoreApplication::tr("The base class %1 is invalid.").arg(baseClass);
            return false;
        }

        const int existingClassIndex = widgetDataBase->indexOfClassName(className);

        if (existingClassIndex != -1) {
            *errorMessage = QCoreApplication::tr("The class %1 already exists.").arg(className);
            return false;
        }
        // Clone derived item.
        QDesignerWidgetDataBaseItemInterface *promotedItem = WidgetDataBaseItem::clone(widgetDataBase->item(baseClassIndex));
        // Also inherit the container flag in case of QWidget-derived classes
        // as it is most likely intended for stacked pages.
        // set new props
        promotedItem->setName(className);
        promotedItem->setGroup(QCoreApplication::tr("Promoted Widgets"));
        promotedItem->setCustom(true);
        promotedItem->setPromoted(true);
        promotedItem->setExtends(baseClass);
        promotedItem->setIncludeFile(includeFile);
        widgetDataBase->append(promotedItem);
        return true;
    }

    QList<QDesignerWidgetDataBaseItemInterface *> QDesignerPromotion::promotionBaseClasses() const
    {
        typedef QMap<QString, QDesignerWidgetDataBaseItemInterface *> SortedDatabaseItemMap;
        SortedDatabaseItemMap sortedDatabaseItemMap;

        QDesignerWidgetDataBaseInterface *widgetDataBase = m_core->widgetDataBase();

        const int cnt = widgetDataBase->count();
        for (int i = 0; i <  cnt; i++) {
            QDesignerWidgetDataBaseItemInterface *dbItem = widgetDataBase->item(i);
            if (canBePromoted(dbItem)) {
                sortedDatabaseItemMap.insert(dbItem->name(), dbItem);
            }
        }

        return sortedDatabaseItemMap.values();
    }