/**************************************************************************
 *  This file is part of QXmlEdit                                         *
 *  Copyright (C) 2011-2018 by Luca Bellonda and individual contributors  *
 *    as indicated in the AUTHORS file                                    *
 *  lbellonda _at_ gmail.com                                              *
 *                                                                        *
 * This library is free software; you can redistribute it and/or          *
 * modify it under the terms of the GNU Library General Public            *
 * License as published by the Free Software Foundation; either           *
 * version 2 of the License, or (at your option) any later version.       *
 *                                                                        *
 * This library is distributed in the hope that it will be useful,        *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU      *
 * Library General Public License for more details.                       *
 *                                                                        *
 * You should have received a copy of the GNU Library General Public      *
 * License along with this library; if not, write to the                  *
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,       *
 * Boston, MA  02110-1301  USA                                            *
 **************************************************************************/
#ifndef QXMLEDITWIDGET_REGOLA_H
#define QXMLEDITWIDGET_REGOLA_H

#include "xmlEdit.h"

#include <QAbstractItemModel>
#include <QtXml/QDomDocument>
#include <QtXml/QDomNode>
#include <QVariant>
#include <QtGui>
#include <QAbstractItemModel>

#include "libQXmlEdit_global.h"
#include "UIDelegate.h"

#include "element.h"
#include "bookmark.h"
#include "paintinfo.h"
#include "xmlprolog.h"
#include "qxmleditdata.h"

class Element;
class DocumentType;
class CopyAttributesSession;
class MetadataInfo;
class PseudoAttribute;
class QUndoGroup;
class QXmlEditData;
class NamespaceReferenceEntry;
class XMLLoadContext;
class XSDOperationParameters;
class XMLIndentationSettings;

class LIBQXMLEDITSHARED_EXPORT DocumentDeviceProvider
{
public:
    virtual ~DocumentDeviceProvider();
    virtual QIODevice *newDeviceForWrite(const QString &path) = 0;
};

class XMLSaveContext;
class NamespaceManager;

enum QxmlEditDeleteElements {
    DeleteAllSiblings,
    DeleteAllSiblingsBefore,
    DeleteAllSiblingsAfter,
};

class LIBQXMLEDITSHARED_EXPORT RegolaDeleteSiblings
{
    RegolaDeleteSiblings();
    ~RegolaDeleteSiblings();
public:
    enum DeleteOptions {
        DeleteAllSiblings,
        DeleteAllSiblingsBefore,
        DeleteAllSiblingsAfter,
    };

};

class LIBQXMLEDITSHARED_EXPORT RegolaSettings
{
    int indentation;
    bool useIndent;
public:
    RegolaSettings()
    {
        indentation = 0;
        useIndent = false;
    }
    ~RegolaSettings() {}
    int getIndentation() const;
    void setIndentation(int value);
    bool isUseIndent() const;
    void setUseIndent(bool value);
};

class LIBQXMLEDITSHARED_EXPORT ElementUndoInfo
{
public:
    QList<int> path;
    QString tag;
    bool replaceAttributes;
    QList<QPair<QString, QString> > attributes;
    ElementUndoInfo()
    {
        replaceAttributes = false ;
    }
    void undoReplaceAttributes()
    {
        replaceAttributes = false;
        attributes.clear();
    }
};

class LIBQXMLEDITSHARED_EXPORT ElementUndoObserver
{
public:
    ElementUndoObserver();
    virtual ~ElementUndoObserver();

    virtual bool observe(ElementUndoInfo *info) = 0 ;
};

/*!
 * \brief The XMLLoadStatus class
 * status and coded for evalutaing the load operation
 */
class LIBQXMLEDITSHARED_EXPORT XMLLoadStatus
{
    bool _areErrorsPresent;
    bool _isSample;
public:
    XMLLoadStatus();
    virtual ~XMLLoadStatus();

    bool areErrorsPresent() const ;
    void setErrorsPresent() ;
    void clearErrors() ;
    bool isSample() const;
    void setSample(bool value);
};

class LIBQXMLEDITSHARED_EXPORT XMLLoadErrorHandler
{
public:
    XMLLoadErrorHandler();
    virtual ~XMLLoadErrorHandler();

    virtual bool showErrorAndAskUserIfContinue(QWidget *parent, XMLLoadContext *context, QXmlStreamReader *xmlReader) = 0 ;
};

class LIBQXMLEDITSHARED_EXPORT TextEditorInterface
{
public:
    TextEditorInterface();
    virtual ~TextEditorInterface();
    virtual bool editTextualForInterface(QWidget *const parentWindow, Element *element) = 0;
};

class LIBQXMLEDITSHARED_EXPORT Regola : public QAbstractItemModel, TextEditorInterface
{
    Q_OBJECT
    Q_PROPERTY(bool modified READ isModified WRITE setModified)

private:
#ifdef QXMLEDIT_TEST
    friend class TestXsd;
#endif
    static const int ModelName;
    static const int ModelValue;
    static const int ModelColumns;

    static const QString DefaultEncoding;

    // constants
    enum EConsts {
        // undo limit
        UndoLimitCount = 10
    };

    bool _formattingInfo; // formatting info from data
    bool _attributesIndentSettings;
    QXmlEditData::EIndentAttributes _indentAttributes;
    int _indentAttributesColumns;
    bool _overrideGlobalIndentation;
    int _indent;
    bool _useMixedContent;
    bool _isCrapCacheNSActivated;
    QHash<QString, QString> _crapCachePrefixNs;
    QUndoStack _undoStack;
    XmlProlog _prolog;
    bool _forceDOM;
public:

    enum EExportOption {
        ExportOptionNone = 0,
        ExportOptionUseDeclaration = 1,
        ExportOptionUseNamespace = 2
    };
    Q_DECLARE_FLAGS(EExportOptions, EExportOption)

    enum ESaveAttributes {
        SaveAttributesUsingDefault,
        SaveAttributesSortingAlphabetically,
        SaveAttributesNoSort
    };

    static const QString XsltNameSpace;
    static const QString XSDNameSpace;
    static const QString XSDSchemaInstance;

    typedef bool (*EditHook)(QWidget *const parentWindow, QTreeWidgetItem *item, UIDelegate *uiDelegate, Element* element);
    typedef bool (*EditTextHook)(QWidget *const parentWindow, QTreeWidgetItem *item, UIDelegate *uiDelegate, Element* element);
private:
    // This hook will throw an error, when used.
    EditHook _editHook ;
    EditTextHook _editTextHook ;

    QString _originalEncoding;
    ESaveAttributes _saveAttributesMethod;
    bool _ownPaintInfo;

public:
    Regola(QDomDocument &document, const QString &name, const bool useMixedContent = false);
    Regola(const QString &name, const bool useMixedContent = false);
    Regola();
    ~Regola();

    Regola *lightClone();

    void setFormattingInfo(const bool value);
    bool hasFormattingInfo();
    bool readFormattingInfo();
    void applyFormatting(XMLIndentationSettings *settings);
    void formattingInfoToSettings(XMLIndentationSettings *settings);
    void updateMetaInfoFormatting();
    bool insertFormattingInfo(QTreeWidget *tree, const bool undoableOperation);
    bool addFormattingInfo(QTreeWidget *tree);
    bool removeFormattingInfo(QTreeWidget *tree);
    Element *findFormattingInfo();

    //----
    static Regola *loadFromDevice(QIODevice *ioDevice, const QString &fileName, QString *errorMessage);
    static Regola *loadFromFile(const QString &fileName, QString *errorMessage);
    //----
    //---------------------------------- Model Interface
    QVariant data(const QModelIndex &index, int role) const;
    Qt::ItemFlags flags(const QModelIndex &index) const;
    //QVariant itemData(const QModelIndex &index) const;
    virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
    QModelIndex index(int row, int column, const QModelIndex &parent) const;
    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QModelIndex parent(const QModelIndex &child) const;
    //bool hasChildren(const QModelIndex &index = QModelIndex()) const;

    //---------------------------------- end Model Interface

    //---region(encoding)
    QString encoding();
    QString originalEncoding();
    void checkEncoding(const bool isFirstTime = false);
    void checkEncodingByEl(Element *element);
    bool setEncoding(QTreeWidget *tree, UIDelegate *uiDelegate, const QString &newEncoding);
    //---endregion(encoding)

    void setDeviceProvider(DocumentDeviceProvider * value);

    bool isUseMixedContent();
    void setUseMixedContent(const bool value);

    QString docType();
    void setDocType(const QString& newDocType, const QString &systemId, const QString &publicId, const QString& newDtd);
    DocumentType *docTypeInfo();

    void setPaintInfo(PaintInfo *newValue);
    PaintInfo *getPaintInfo();

    void setEditHook(EditHook theEditHook);
    void setEditTextHook(EditTextHook theEditTextHook);

    void caricaValori(QTreeWidget *pTree);
    bool isEmpty(const bool isRealElement);
    Element *root() const;
    Element *firstChild() const;
    Element *lastChild() const;
    Element *firstChildRecursive() const;
    Element *lastChildRecursive() const;
    Element *topElement(const int pos) const;
    void setRootElement(Element *newRoot);
    bool write(const QString &filePath);
    bool write(const QString &filePath, const bool isMarkSaved);
    bool write(QIODevice *device, const bool isMarkSaved);
    bool writeStream(QIODevice *device, const bool isMarkSaved, ElementLoadInfoMap *map = NULL);
    bool writeStreamElement(QIODevice *device, EExportOptions options, Element *selected);
    bool exportElement(const QString &filePath, EExportOptions options, Element *selected);
    bool exportElement(QIODevice *outDevice, EExportOptions options, Element *selected);
private:
    bool writeStreamInternal(QIODevice *device, const bool useEncoding, ElementLoadInfoMap *map);
    bool writeStreamInternalElement(QIODevice *device, EExportOptions options, Element *selected);
public:
    bool writeAsJavaString(QIODevice *device);
    bool writeAsCString(QIODevice *device);
    bool writeAsJavaStringInFile(const QString &filePath);
    bool writeAsCStringInFile(const QString &filePath);
    bool isUseStreamForSaving();
    bool isEncodingCompatibleWithStream();
    QByteArray writeMemory();
    QString getAsText();
    QString getAsText(ElementLoadInfoMap *map);
private:
    QString getAsTextStream(ElementLoadInfoMap *map);
public:
    void removeAllElements(QTreeWidget *tree);
    void insertElementForce(Element *element);
    Element *attachElementAt(QTreeWidget *tree, Element *parentElement, Element *attachedElement, const int position);
    Element * syncRoot();

    Element *newElement();
    Element *newElement(const QString &tagName);
    Element *newElement(const Element::ElType newType);

    void setModified(const bool state);
    bool isModified() const;
    void setEmptyRoot();
    void expand(QTreeWidget *tree);

    QString &fileName();
    void setFileName(const QString &newFileName);

    void addChild(QWidget *window, QTreeWidget *tree);
    void addChild(QWidget *window, QTreeWidget *tree, Element *preElement);
    Element* addChildToElement(QWidget *window, QTreeWidget *tree, Element *parentElement, const QString &elementTag, const bool useUndo = false);
    void addBrother(QWidget* window, QTreeWidget *tree);
    void addBrother(QWidget *window, QTreeWidget *tree, Element* theNewElement);
    void paste(QTreeWidget *tree, Element *pasteElement);
    void paste(QTreeWidget *tree, QList<Element*> &pasteElements);
    void pasteAsSibling(QWidget *window, QTreeWidget *tree, Element *pasteElement);
    void pasteAsSibling(QWidget *window, QTreeWidget *tree, QList<Element*> &pasteElements);
    void pasteInternals(QTreeWidget *tree, Element *parentElement, Element *pasteElement, const int position);
    void pasteNoUI(Element *pasteElement, Element *pasteTo);
    Element *insertInternal(QTreeWidget *tree, Element *parentElement, Element *pasteElement, const int position, const bool isRecursive = true);
    Element *updateElementUI(Element *element, const bool isRecursive = true);
    void pasteAttributesInternals(QTreeWidget *tree, Element *element, CopyAttributesSession *attributesCopied);
    void pasteClearAttributesInternals(QTreeWidget *tree, Element *element, CopyAttributesSession *attributesCopied);
    void pasteAttributes(QWidget *window, QTreeWidget *tree, CopyAttributesSession *attributesCopied);
    void pasteAttributes(QTreeWidget *tree, Element *element, CopyAttributesSession *attributesCopied);

    void redisplay();
    void redisplayElement(Element *element);
    void markSaved();
    void markEdited();
    bool editElement(QWidget * const parentWindow, QTreeWidgetItem *item, UIDelegate *uiDelegate) ;
    bool editElementWithTextEditor(QWidget *const parentWindow, QTreeWidget *treeWidget, QTreeWidgetItem *item, TextEditorInterface *editor = NULL);
    bool editInnerXMLBase64Element(QTreeWidgetItem *item, UIDelegate *uiDelegate);
    bool editInnerXMLElement(QTreeWidgetItem *item, UIDelegate *uiDelegate);
    bool editTextNodeElementBase64(QWidget *const parentWindow, QTreeWidgetItem *item, UIDelegate *uiDelegate);
    bool editAndSubstituteTextInNodeElement(QWidget *const parentWindow, Element *pElement, UIDelegate *uiDelegate);
    bool editEntry(QWidget * const parentWindow, const QString &title, const QString &label, const QString &actualText, QString &result);

    bool addTopElement(Element *theNewElement, const int position = -1);
    void notifyDeletionTopElement(Element *pEL);
    void appendComment(QWidget *window, QTreeWidget *tree);
    void appendComment(QWidget *window, QTreeWidget *tree, Element *newComment);
    void addComment(QWidget *window, QTreeWidget *tree);
    void addComment(QWidget *window, QTreeWidget *tree, Element *newComment);
    void appendProcessingInstruction(QWidget *window, QTreeWidget *tree);
    void appendProcessingInstruction(QWidget *window, QTreeWidget *tree, Element *newPI);
    void addProcessingInstruction(QWidget *window, QTreeWidget *tree);
    void addProcessingInstruction(QWidget *window, QTreeWidget *tree, Element *newPI);

    //---region(prolog)
    bool insertProlog(QTreeWidget *tree, const QString &encoding, const bool undoableOperation = true);
    Element *prolog();
    bool hasProlog();
    //---endregion(prolog)

    //---region(metadata)
    void insertMetadata(QTreeWidget *tree);
    void insertCompleteMetadata(QTreeWidget *tree);
    void updateMetadata(QTreeWidget *tree);
    bool parseMetadata(MetadataInfo *info);
    bool applyMetadata(QTreeWidget *tree, MetadataInfo *info);
    //--endregion(metadata)

    QVector<Element*> &getItems()
    {
        return childItems;
    }
    QVector<Element*> *getChildItems()
    {
        return &childItems;
    }

    static QBrush hiliteBkBrush;

    Element * findText(FindTextParams &findArgs, Element *selectedItem);
    Element * findNextTextMatch(FindTextParams &findArgs, Element *selectedItem);
    Element * replaceText(QTreeWidget *treeWidget, ReplaceTextParams &findArgs, Element *selectedItem);
    Element * replaceTextAndMove(QTreeWidget *treeWidget, ReplaceTextParams &replaceArgs, Element *selectedItem);
    void unhilite();

    void takeOutElement(Element*element);
    void addHilite(Element *element);
    void unhiliteAll();
    void unselectRecursive(Element* element);

    // bookmarks
    void clearBookmarks();
    bool addBookmark(Element* element);
    void removeBookmark(Element* element);
    void removeBookmarksRecursive(Element* element);
    void toggleBookmark(Element *element);
    bool isBookmarked(Element* element);
    QList<Element*> getUniqueBookmarksElements(const TargetSelection::Type type);

    Element *gotoPreviousBookmark();
    Element *gotoNextBookmark();

    int bookmarkSize();
    int nextBookmark();
    int previousBookmark();
    void handleSelection(Element *element);
    void notifyUIDeleted(Element *element);
    void takeoutFormBookmarks(Element *element);

    void deleteBookmarked();
    void cleanBookmarkedContents() ;

    bool loadXplore(const QString &fileName);

    QString documentXsd()
    {
        return _documentXsd ;
    }
    QString userDefinedXsd()
    {
        return _userDefinedXsd;
    }
    void setUserAndDocumentXsd(const QString &newXsd);

    void setUserDefinedXsd(const QString &path);
    void pasteXML(QTreeWidget *tree, Regola *newRegola) ;
    void pasteElements(QTreeWidget *tree, QList<Element*> elements);

    bool collectSizeData();
    void setCollectSizeData(const bool isCollect);
    void assignCollectSizeDataFlag(const bool isCollect);
    //---region(names)
    QString addNameToPool(const QString &inputString);
    QString getAttributeString(const QString &attributeName);
    QString getAttributeNameString(const QString &attributeString);
    QSet<QString> *namesPool();
    QSet<QString> *attributeNamesPool();
    QSet<QString> attributeNamesPoolByValue();
    //---endregion(names)
    bool isValidXsd();
    void transformInComment(QWidget *window, QTreeWidget *tree, Element *elementToTransform);
    bool generateFromComment(QTreeWidget *tree, UIDelegate *uiDelegate, Element *elementToTransform);
    int indexOfTopLevelItem(Element *element);
    bool hasMoreThanOneXsdFile();

    Element *findChildElementByArray(Element *element, QList<int> &selection, const int listPos);
    Element *findElementByArray(QList<int> &selection);
    bool findElement(Element *toFind);

    QString textOfCantEditMixedContentElementText();
    void hideLeafNodes();
    void showLeafNodes();

    bool moveUp(Element *element);
    bool moveDown(Element *element);
    bool internalMoveUp(Element *element, const bool registerInUndo);
    bool internalMoveDown(Element *element, const bool registerInUndo);

    void redo();
    void undo();
    bool canUndo();
    bool canRedo();
    int undoCount();

    bool checkIfUIItemsCorrespondToElements(Element *target);

    bool deleteElement(Element* element);
    bool deleteElement(Element* element, const bool isAutoDelete);
    bool takeElement(Element* element, const bool isUseUndo = false);
    void removeElementReference(Element *element);

    void emptyUndoStack();
    void dumpDocument(QDomDocument &document);

    void insertElementComplete(Element *theNewElement, Element *parentElement, QTreeWidget *tree);
    void appendElementComplete(Element *theNewElement, Element *brotherElement, QTreeWidget *tree, const bool useUndo);
    void refreshChildrenOfElement(Element *element, QTreeWidget *tree)    ;

    void namespacesPrefixFor(const QString &ns, Element *element, QSet<QString> &prefixes, QSet<QString> &allPrefixes);
    QSet<QString> namespacePrefixesXSD(Element *element);
    QString namespacePrefixFor(const QString &ns);
    QString namespacePrefixXSD();
    QString namespacePrefixXslt();
    QString namespacePrefixXSI();
    QString namespacePrefixInRoot(const QString &namespaceToFind);
    QMap<QString, QString> namespaces();
    QString getCachedPrefixNS(const QString &nsURI);
    bool hasXSLTNamespace();
    bool hasSCXMLNamespace();
    QSet<QString> namespacesURI();
    QString namespaceOfPrefix(const QString &prefix);
    bool removeNillableAttribute(QTreeWidget *tree, Element *currentElement, NamespaceManager &namespaceManager);
    bool removeXSITypeAttribute(QTreeWidget *tree, Element *currentElement, NamespaceManager &namespaceManager);
    bool insertNillableAttribute(QTreeWidget *tree, Element *currentElement, NamespaceManager &namespaceManager);
    bool insertXSITypeAttribute(QTreeWidget *tree, Element *currentElement, const QString &typeValue, NamespaceManager &namespaceManager);
    bool insertXSDReference(QTreeWidget *tree, NamespaceManager &namespaceManager, NamespaceReferenceEntry *command);
    QString unusedPrefixByElement(Element *element);

    static QList<Element*> decodeXMLFromString(const QString &input, const bool onlyRootElement, const bool onlyElements = true);

    int indentation() const;
    void setIndentation(const int indent);
    void setIndentationForce(const int indent);
    bool hasIndentation() const;
    bool overrideGlobalIndentation() const ;
    void setOverrideGlobalIndentation(const bool value);
    void emitIndentationChange();

    //------------region(containers)
    void insertChildContainer(QTreeWidget *tree, Element *parentElement);
    void insertParent(QTreeWidget *tree, Element *parentElement, const bool useTextualInterface = false);
    void insertDisabledParent(QTreeWidget *tree, Element *element);
    void removeParent(QTreeWidget *tree, Element *parentElement);

    void doInsertChildContainer(QTreeWidget *tree, const QString &tag, QList<Attribute *> attributesIn, Element *parentElement);
    void doInsertParent(QTreeWidget *tree, const QString &tag, QList<Attribute *> attributesIn, Element *parentElement);


    bool insertChildContainerAction(Element *parentElement, const QString &tag, QList<Attribute*> attributesIn, QTreeWidget *tree);
    void removeChildContainerAction(Element *parentElement, QTreeWidget *tree);
    bool insertParentAction(Element *element, const QString &tag, QList<Attribute *> attributesIn, QTreeWidget *tree, const int insPos, const int insLen);
    bool removeParentAction(Element *element, QTreeWidget *tree, int &insPos, int &insLen);
    //------------endregion(containers)

    void addUndo(QUndoCommand *undoGroup);
    void anonymize(AnonAlg *alg);
    void anonymize(AnonContext *context, QTreeWidget *treeWidget, const bool doDirect = false);

    QHash<QString, QString> mapOfSchemaReferences();

    static QString roleForKnownUri(const QString &uri);
    QString noNameSpaceXsd();
    QHash<QString, QSet<QString> > allNamespaces();

    RegolaSettings *getSettings();
    void restoreSettings(RegolaSettings *settings);
    void XSDReferences(NamespaceReferenceEntry *entry);

    NamespaceManager *namespaceManager() const;
    void setNamespaceManager(NamespaceManager *namespaceManager);

    bool isSavingSortingAttributes();

    ESaveAttributes saveAttributesMethod() const;
    void setSaveAttributesMethod(const ESaveAttributes saveAttributesMethod);
    static bool isSaveSortAlphaAttribute();

    bool readFromStream(XMLLoadContext *context, QXmlStreamReader *xmlReader);

    QString dtd();
    void setDtd(const QString &dtd);
    bool setNewDTD(const QString &newDtd);
    void updateElement(Element* pElement, const bool updateGUI = false);

    //--- begin (indent attributes)
    void setIndentAttributesSettings(const bool forceSettings, const QXmlEditData::EIndentAttributes valueSetting, const int valueCols);
    int xmlIndentAttributesColumns();
    void setXmlIndentAttributesColumns(const int value);
    QXmlEditData::EIndentAttributes xmlIndentAttributesType();
    void setXmlIndentAttributesType(const QXmlEditData::EIndentAttributes value);
    bool isUseXmlIndentAttributesSettings();
    void setUseXmlIndentAttributesSettings(const bool value);
    //--- end (indent attributes)

    //--- begin (sort attributes)
    bool sortAttributesOfElement(Element* element, const bool isRecursive);
    void sortAttributes();
    //--- end (sort attributes)

    void XSDSetNamespaceToParams(XSDOperationParameters *params, Element *element);
signals:
    void wasModified();
    void undoStateChanged();
    void uiDeleted(Element *element);
    void docTypeChanged(const QString &docType);
    void encodingChanged(const QString &encoding);
    void indentationChanged(const bool enabled, const int newIndent);

private:
    Element     *rootItem;
    // processing instructions and so on
    QVector<Element*> childItems;
    QString     xmlFileName;
    bool        modified;
    QHash<long, Element*> selection;
    Bookmarks   bookmarks;
    PaintInfo   *paintInfo;
    DocumentDeviceProvider *_deviceProvider;
    NamespaceManager *_namespaceManager ;


    /**
      XSD file referenced in the document (if any)
      */
    bool _useNoNamespaceXSD ; // attribute declared or not
    bool _useNamespaceXSD ; // attribute declared or not
    QString     _noNameSpaceXsd;
    QString     _documentXsd ; // see the note about xsd handling
    // list of namespaces - namespace name e.g.: <xsi, http://www.w3.org/2001/XMLSchema-instance>
    QHash<QString, QString> _namespacesByPrefixAndName;
    // the inverse of the previous one, <http://www.w3.org/2001/XMLSchema-instance, xsi>
    QHash<QString, QString> _namespacesByNameAndPrefix;
    // list of schemas - location e.g.: <http://www.w3.org/2001/XMLSchema-instance, xxx.xsd>
    QHash<QString, QString> _schemaLocationsByNamespace;
    QList<QPair<QString, QString> > _schemaLocationsList;
    QString     _userDefinedXsd;
    /**
      collect or not size informations about elements while editing
      */
    bool        _collectSizeData;
    QMap<QString, int>   _namesMap;
    QSet<QString>   _namesPool;
    QSet<QString>   _attributeValuesPool;
    QSet<QString>   _attributeNamesPool;
    DocumentType *_docType;

    void clear();
public:
    void clearUndo();
    bool isForceDOM() const;
    void setForceDOM(bool newValue);

    bool updateElementInplace(ElementUndoInfo *info);
    //------------region(prefixes)
    void collectPrefixes(PrefixInfo &info, Element *selection);
    bool removePrefix(const QString &removedPrefix, QList<Element*> elements, TargetSelection::Type targetSelection, const bool isAllPrefixes, ElementUndoObserver *observer);
    bool setPrefix(const QString &newPrefix, QList<Element*> elements, TargetSelection::Type targetSelection, ElementUndoObserver *observer);
    bool replacePrefix(const QString &oldPrefix, const QString &newPrefix, QList<Element*> elements, TargetSelection::Type targetSelection, const bool isAllPrefixes, ElementUndoObserver *observer);

    //------------endregion(prefixes)

    //------------region(namespaces)
    void collectNamespaces(NamespacesInfo &info, Element *selection);
    bool removeNamespace(const QString &removedNS, QList<Element*> elements, TargetSelection::Type targetSelection,
                         const bool isAllNamespaces, const bool removeDeclarations, ElementUndoObserver *observer);
    bool setNamespace(const QString &ns, const QString &prefix, QList<Element*> elements, TargetSelection::Type targetSelection,
                      ElementUndoObserver *observer);
    bool replaceNamespace(const QString &replacedNS, const QString &newNS, const QString &newPrefix, QList<Element*> elements,
                          TargetSelection::Type targetSelection, ElementUndoObserver *observer);
    bool namespaceAvoidClash(const QString &prefixToAvoid, const QString &legalNS, NamespacesInfo *namespacesInfo, ElementUndoObserver *observer);
    bool namespaceNormalize(const QString &thePrefix, const QString &theNS, QList<Element*> elements, const bool declareOnlyOnRoot, ElementUndoObserver *observer);
    //------------endregion(namespaces)
    static NSContext* buildContextInfo(QList<NSContext*> &contexts, Element *element);

    bool editElementWrapper(QTreeWidget *treeWidget, Element *newElement, Element *selectedElement);
    bool applyEditAndSwapElement(Element *newElement, Element *swapElement, QList<int> path);

    QList<int> elementPathForPath(QList<int> &inputPos);
    static Regola *loadFromOpenFile(QFile *ioDevice);

private:
    void addUndoInsert(QTreeWidget * tree, Element * element);
    QTreeWidgetItem *getSelItem(QTreeWidget *tree);
    bool editNodeElementAsXML(const bool isBase64Coded, Element *pElement, UIDelegate *uiDelegate);
    bool editNodeElement(QWidget *const parentWindow, Element *pElement, Element *pParentElement, const bool enableAllControls = true);
    bool editNodeElementWithTextEditor(QWidget *const parentWindow, Element *pElement);
    bool editNodeComment(QWidget * const parentWindow, Element *pElement);
    bool editTextNodeElement(QWidget *const parentWindow, const bool isBase64Coded, Element *pElement);
    void recalcSize();

    void getBookmarkedElements(QVector<Element*> &elementsBookmarked);

    void checkValidationReference();
    void decodeASchema(const QString &value);

    int setTopLevelItemLike(Element *newElement, Element* oldElement);
    int swapAndDeleteElement(Element *newElement, Element* oldElement);

    void insertElementInternal(Element *theNewElement, Element *parentElement, QTreeWidget *tree);
    void insertElementInternal(Element *theNewElement, Element *parentElement, QTreeWidget *tree, const bool useUndo);
    void appendElementInternal(Element *theNewElement, Element *brotherElement, QTreeWidget *tree, const bool useUndo = true);
    void afterInsertHousekeeping(Element *theNewElement, QTreeWidget *tree);
    void afterInsertHousekeeping(Element *theNewElement, QTreeWidget *tree, const bool useUndo);
    void assignMixedContentText(Element *parent, const QString &text, const bool isCData, QVector<Element*> *collection);
    Element *assegnaValori(QDomNode &node, Element *parent, QVector<Element*> *collection);
    bool addUndoDeleteElement(Element* element);
    bool editAndSubstituteTextInNodeElementInternal(QWidget *const parentWindow, Element *pElement, UIDelegate *uiDelegate);
    void housework();
    void processDocument(QDomDocument &document);
    QDomDocument createNewDocument();
    void searchWithXQuery(FindTextParams &findArgs, Element *selectedItem);
    //metadata
    void updateMetadataRecord(QTreeWidget *tree, Element *metaElement, MetadataInfo *info, const bool metaExists = false);
    void appendAMetadatum(QTreeWidget *tree, PseudoAttribute *attribute, const QString &type);
    //---region(prolog)
    Element *insertPrologData(const QString &encoding);
    QString makePrologData(const QString &encoding);
    //---endregion(prolog)

    //------------region(containers)
    void insertParentForElement(QTreeWidget *tree, Element *element, Element *newParent, const int insPos, const int insLen, const bool replaceUI = true);
    bool removeParentForChildAndMoveOtherNodes(QTreeWidget *tree, Element *element, int &insPos, int &insLen, const bool replaceUI = true);
    //------------endregion(containers)

    Element *findTheNextTextMatch(FindTextParams &findArgs, Element *selectedItem);
    bool removeXSIAttribute(QTreeWidget *tree, Element *currentElement, NamespaceManager &namespaceManager, const QString &attributeToRemove);
    bool insertXSIAttribute(QTreeWidget *tree, Element *currentElement, NamespaceManager &namespaceManager,
                            const QString &newAttributeName, const QString &newAttribueValue);
#ifdef  QXMLEDIT_TEST
    friend class TestSearch;
    friend class TestInsertXsdReference;
#endif

    bool setChildrenTreeFromStream(XMLLoadContext *context, QXmlStreamReader *xmlReader, Element *parent, QVector<Element*> *collection, const bool isTopLevel);
    bool decodePreamble(QXmlStreamReader *xmlReader, const QString &encoding);
    bool filterCommentsAfterReading(XMLLoadContext *context);
    virtual bool editTextualForInterface(QWidget *const parentWindow, Element *element);

    bool decodeFormattingInfo();
    Element *insertFormattingInfoWithPosition(const int position);
    QString makeFormattingInfo();
    int topPositionForFormattingInfo();
    Element *newFormattingInfoElement();
};

class LIBQXMLEDITSHARED_EXPORT XMLIndentationSettings
{

public:
    enum ESettings {
        PresetApacheFOP,
        PresetNoIndent,
        Preset2SpacesOneAttributePerLine
    };

    bool useFormatting;
    bool useIndent;
    int indent;
    Regola::ESaveAttributes saveAttrMethod;
    QXmlEditData::EIndentAttributes indentAttributesSetting;
    int indentAttributesColumns;

    XMLIndentationSettings();
    virtual ~XMLIndentationSettings();

    bool applyPreset(const ESettings preset);

    void setup(const bool useIndent, const int indent,
               const Regola::ESaveAttributes saveAttributesMethod,
               const QXmlEditData::EIndentAttributes indentAttributesSetting, const int indentAttributesColumns);

};

Q_DECLARE_OPERATORS_FOR_FLAGS(Regola::EExportOptions)

// external edit
bool EditCommentNode(QWidget * parent, Element *pTarget);

#endif // QXMLEDITWIDGET_REGOLA_H
