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+/* This file is part of the KDE project
+ Copyright (C) 2002 David Faure <faure@kde.org>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License version 2 as published by the Free Software Foundation.
+
+ 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; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KOTEXTITERATOR_H
+#define KOTEXTITERATOR_H
+
+#include <qvaluelist.h>
+#include <qstring.h>
+#include <qpair.h>
+#include <qobject.h>
+#include <koffice_export.h>
+class KoTextParag;
+class KoTextObject;
+class KoTextView;
+
+/**
+ * A convenient way to iterate over paragraphs, possibly in multiple textobjects,
+ * with many options (from cursor, backwards, in selection).
+ * @short General purpose paragraph iterator
+ */
+class KOTEXT_EXPORT KoTextIterator : public QObject
+{
+ Q_OBJECT
+public:
+ /**
+ * @param lstObjects list of text objects to iterate over
+ * @param textView view in which the objects live
+ * @param options see KFindDialog
+ */
+ KoTextIterator( const QValueList<KoTextObject *> & lstObjects, KoTextView* textView, int options ) {
+ init( lstObjects, textView, options );
+ }
+ void init( const QValueList<KoTextObject *> & lstObjects, KoTextView* textView, int options );
+
+ /**
+ * Restart from the beginning - assumes same parameters given to init
+ */
+ void restart();
+
+ /**
+ * Change options during iteration. ## Not sure how if all cases will be handled :}
+ * At least this is useful for the "Replace All" button during replacing,
+ * and for switching to "FindBackwards" temporarily for "find previous".
+ */
+ void setOptions( int options );
+
+ /**
+ * Return the options currently used by the iterator.
+ */
+ int options() const { return m_options; }
+
+ /**
+ * Go to next paragraph that we must iterate over
+ */
+ void operator++();
+
+ /**
+ * @return true if we have iterated over all paragraphs
+ */
+ bool atEnd() const;
+
+ /**
+ * @return true if currentText() isn't empty. The implementation is
+ * faster than calling currentText().isEmpty() though.
+ */
+ bool hasText() const;
+
+ /**
+ * @return the string at the current position of the iterator
+ */
+ QString currentText() const;
+
+ /**
+ * @return the string at the current position of the iterator
+ */
+ KoTextParag* currentParag() const { return m_currentParag; }
+
+ /**
+ * @return the text object in which @ref currentParag() is.
+ */
+ KoTextObject* currentTextObject() const { return *m_currentTextObj; }
+
+ /**
+ * Where in @ref currentParag() does @ref currentText() start?
+ */
+ int currentStartIndex() const;
+
+ /**
+ * @return the string at the current position of the iterator,
+ * as well as the index in the current paragraph.
+ * Use this instead of separate calls to currentText and currentStartIndex,
+ * for performance reasons.
+ */
+ QPair<int, QString> currentTextAndIndex() const;
+
+signals:
+ /**
+ * Emitted when the current paragraph has been modified by the user.
+ * Apps will often want to call setData again
+ */
+ void currentParagraphModified( int modifyType, int pos, int length );
+
+ /**
+ * Emitted when the current paragraph has been deleted by the user.
+ * When this happens, the iterator automatically moves to the next paragraph (if any).
+ */
+ void currentParagraphDeleted();
+
+protected:
+ void connectTextObjects();
+ void nextTextObject();
+
+protected slots:
+ void slotParagraphDeleted( KoTextParag* parag );
+ void slotParagraphModified( KoTextParag* parag, int /*ParagModifyType*/, int pos, int length );
+
+private:
+ // The reason we use a QValueList of pointers instead of QPtrList
+ // is that having a QPtrListIterator member var can't work, one can't
+ // initialize it afterwards.
+ QValueList<KoTextObject *> m_lstObjects;
+ int m_options;
+
+ // This is relative to the first textobject in m_lstObjects
+ // We always start from this paragraph (even when going backwards)
+ KoTextParag* m_firstParag;
+ int m_firstIndex;
+
+ // This is relative to the last textobject in m_lstObjects
+ // We're done when we hit this paragraph
+ KoTextParag* m_lastParag;
+ int m_lastIndex;
+
+ // Our current position
+ QValueList<KoTextObject *>::Iterator m_currentTextObj;
+ KoTextParag* m_currentParag;
+};
+
+#endif