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+/***************************************************************************
+ copyright : (C) 2003-2006 by Robby Stephenson
+ ***************************************************************************/
+
+/***************************************************************************
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of version 2 of the GNU General Public License as *
+ * published by the Free Software Foundation; *
+ * *
+ ***************************************************************************/
+
+#ifndef IMPORTER_H
+#define IMPORTER_H
+
+class QWidget;
+
+#include "../datavectors.h"
+
+#include <klocale.h>
+#include <kurl.h>
+
+#include <qobject.h>
+#include <qstring.h>
+
+namespace Tellico {
+ namespace Import {
+ enum Options {
+ ImportProgress = 1 << 5 // show progress bar
+ };
+
+/**
+ * The top-level abstract class for importing other document formats into Tellico.
+ *
+ * The Importer classes import a file, and return a pointer to a newly created
+ * @ref Data::Collection. Any errors or warnings are added to a status message queue.
+ * The calling function owns the collection pointer.
+ *
+ * @author Robby Stephenson
+ */
+class Importer : public QObject {
+Q_OBJECT
+
+public:
+ Importer() : QObject(), m_options(ImportProgress) {}
+ /**
+ * The constructor should immediately load the contents of the file to be imported.
+ * Any warnings or errors should be added the the status message queue.
+ *
+ * @param url The URL of the file to import
+ */
+ Importer(const KURL& url) : QObject(), m_options(ImportProgress), m_urls(url) {}
+ Importer(const KURL::List& urls) : QObject(), m_options(ImportProgress), m_urls(urls) {}
+ Importer(const QString& text) : QObject(), m_options(ImportProgress), m_text(text) {}
+ /**
+ */
+ virtual ~Importer() {}
+
+ /**
+ * Returns a pointer to a @ref Data::Collection containing the contents of the imported file.
+ * This function should probably only be called once, but the subclasses may cache the
+ * collection. The collection should not be created until this function is called.
+ *
+ * @return A pointer to a @ref Collection created on the stack, or 0 if none could be created.
+ */
+ virtual Data::CollPtr collection() = 0;
+ /**
+ * Returns a string containing all the messages added to the queue in the course of loading
+ * and importing the file.
+ *
+ * @return The status message
+ */
+ const QString& statusMessage() const { return m_statusMsg; }
+ /**
+ * Returns a widget with the setting specific to this importer, or 0 if no
+ * options are needed.
+ *
+ * @return A pointer to the setting widget
+ */
+ virtual QWidget* widget(QWidget*, const char*) { return 0; }
+ /**
+ * Checks to see if the importer can return a collection of this type
+ *
+ * @param type The collection type to check
+ * @return Whether the importer could return a collection of that type
+ */
+ virtual bool canImport(int) const { return true; }
+ /**
+ * Validate the import settings
+ */
+ virtual bool validImport() const { return true; }
+ virtual void setText(const QString& text) { m_text = text; }
+ long options() const { return m_options; }
+ void setOptions(long options) { m_options = options; }
+ /**
+ * Returns a string useful for the ProgressManager
+ */
+ QString progressLabel() const {
+ if(url().isEmpty()) return i18n("Loading data..."); else return i18n("Loading %1...").arg(url().fileName());
+ }
+
+public slots:
+ /**
+ * The import action was changed in the import dialog
+ */
+ virtual void slotActionChanged(int) {}
+
+protected:
+ /**
+ * Return the URL of the imported file.
+ *
+ * @return the file URL
+ */
+ KURL url() const { return m_urls.isEmpty() ? KURL() : m_urls[0]; }
+ KURL::List urls() const { return m_urls; }
+ QString text() const { return m_text; }
+ /**
+ * Adds a message to the status queue.
+ *
+ * @param msg A string containing a warning or error.
+ */
+ void setStatusMessage(const QString& msg) { if(!msg.isEmpty()) m_statusMsg += msg + QChar(' '); }
+
+ static const uint s_stepSize;
+
+private:
+ long m_options;
+ KURL::List m_urls;
+ QString m_text;
+ QString m_statusMsg;
+};
+
+ } // end namespace
+} // end namespace
+
+#endif