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+/* This file is part of the KDE libraries
+   Copyright (C) 2000 Simon Hausmann <hausmann@kde.org>
+   Copyright (C) 2000 Kurt Granroth <granroth@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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+#ifndef _KXMLGUICLIENT_H
+#define _KXMLGUICLIENT_H
+
+
+//US #include <qdom.h>
+#include <qptrlist.h>
+#include <qmap.h>
+#include <qstringlist.h>
+
+class QWidget;
+class KAction;
+class KActionCollection;
+class KInstance;
+
+class KXMLGUIClientPrivate;
+class KXMLGUIFactory;
+class KXMLGUIBuilder;
+
+/**
+ *
+ * A KXMLGUIClient can be used with @ref KXMLGUIFactory to create a
+ * GUI from actions and an XML document, and can be dynamically merged
+ * with other KXMLGUIClients.
+ */
+class KXMLGUIClient
+{
+    friend class KEditToolbarWidget; // for setXMLFile(3 args)
+public:
+  /**
+   * Constructs a KXMLGUIClient which can be used with a
+   * @ref KXMLGUIFactory to create a GUI from actions and an XML document, and
+   * which can be dynamically merged with other KXMLGUIClients.
+   */
+  KXMLGUIClient();
+
+  /**
+   * Constructs a KXMLGUIClient which can be used with a @ref KXMLGUIFactory
+   * to create a GUI from actions and an XML document,
+   * and which can be dynamically merged with other KXMLGUIClients.
+   *
+   * This constructor takes an additional @p parent argument, which makes
+   * the client a child client of the parent.
+   *
+   * Child clients are automatically added to the GUI if the parent is added.
+   *
+   */
+  KXMLGUIClient( KXMLGUIClient *parent );
+
+  /**
+   * Destructs the KXMLGUIClient.
+   */
+  virtual ~KXMLGUIClient();
+
+  /**
+   * Retrieves an action of the client by name.  If not found, it looks in its child clients.
+   * This method is provided for convenience, as it uses @ref #actionCollection()
+   * to get the action object.
+   */
+  KAction* action( const char* name ) const;
+
+  /**
+   * Retrieves an action for a given @ref QDomElement. The default
+   * implementation uses the "name" attribute to query the action
+   * object via the other action() method.
+   */
+//US  virtual KAction *action( const QDomElement &element ) const;
+
+  /**
+   * Retrieves the entire action collection for the GUI client
+   */
+  virtual KActionCollection* actionCollection() const;
+
+  /**
+   * @return The instance (@ref KInstance) for this part.
+   */
+//US  virtual KInstance *instance() const;
+
+  /**
+   * @return The parsed XML in a @ref QDomDocument, set by @ref
+   * setXMLFile() or @ref setXML().
+   * This document describes the layout of the GUI.
+   */
+//US  virtual QDomDocument domDocument() const;
+
+  /**
+   * This will return the name of the XML file as set by @ref #setXMLFile().
+   * If @ref #setXML() is used directly, then this will return NULL.
+   *
+   * The filename that this returns is obvious for components as each
+   * component has exactly one XML file.  In non-components, however,
+   * there are usually two: the global file and the local file.  This
+   * function doesn't really care about that, though.  It will always
+   * return the last XML file set.  This, in almost all cases, will
+   * be the local XML file.
+   *
+   * @return The name of the XML file or QString::null
+   */
+//US  virtual QString xmlFile() const;
+
+//US  virtual QString localXMLFile() const;
+
+  /**
+   * @internal
+   */
+//US  void setXMLGUIBuildDocument( const QDomDocument &doc );
+  /**
+   * @internal
+   */
+//US  QDomDocument xmlguiBuildDocument() const;
+
+  /**
+   * This method is called by the @ref KXMLGUIFactory as soon as the client
+   * is added to the KXMLGUIFactory's GUI.
+   */
+//US  void setFactory( KXMLGUIFactory *factory );
+  /**
+   * Retrieves a pointer to the @ref KXMLGUIFactory this client is
+   * associated with (will return 0L if the client's GUI has not been built
+   * by a KXMLGUIFactory.
+   */
+//US  KXMLGUIFactory *factory() const;
+
+  /**
+   * KXMLGUIClients can form a simple child/parent object tree. This
+   * method returns a pointer to the parent client or 0L if it has no
+   * parent client assigned.
+   */
+  KXMLGUIClient *parentClient() const;
+
+  /**
+   * Use this method to make a client a child client of another client.
+   * Usually you don't need to call this method, as it is called
+   * automatically when using the second constructor, which takes a
+   * arent argument.
+   */
+  void insertChildClient( KXMLGUIClient *child );
+
+  /**
+   * Removes the given @p child from the client's children list.
+   */
+  void removeChildClient( KXMLGUIClient *child );
+
+  /**
+   * Retrieves a list of all child clients.
+   */
+  const QPtrList<KXMLGUIClient> *childClients();
+
+  /**
+   * A client can have an own @ref KXMLGUIBuilder.
+   * Use this method to assign your builder instance to the client (so that the
+   * @ref KXMLGUIFactory can use it when building the client's GUI)
+   *
+   * Client specific guibuilders are useful if you want to create
+   * custom container widgets for your GUI.
+   */
+//US  void setClientBuilder( KXMLGUIBuilder *builder );
+
+  /**
+   * Retrieves the client's GUI builder or 0L if no client specific
+   * builder has been assigned via @ref #setClientBuilder()
+   */
+//US  KXMLGUIBuilder *clientBuilder() const;
+
+  /**
+   * Forces this client to re-read its XML resource file.  This is
+   * intended to be used when you know that the resource file has
+   * changed and you will soon be rebuilding the GUI.  It has no
+   * useful effect with non-KParts GUIs, so don't bother using it
+   * unless your app is component based.
+   */
+//US  void reloadXML();
+
+  /**
+   * ActionLists are a way for XMLGUI to support dynamic lists of
+   * actions.  E.g. if you are writing a file manager, and there is a
+   * menu file whose contents depend on the mimetype of the file that
+   * is selected, then you can achieve this using ActionLists. It
+   * works as follows:
+   * In your xxxui.rc file ( the one that you set in @ref setXMLFile()
+   * ), you put an <ActionList name="xxx"> tag.  E.g.
+   * \verbatim
+   * <kpartgui name="xxx_part" version="1">
+   * <MenuBar>
+   *   <Menu name="file">
+   *     ...  <!-- some useful actions-->
+   *     <ActionList name="xxx_file_actionlist" />
+   *     ...  <!-- even more useful actions-->
+   *   </Menu>
+   *   ...
+   * </MenuBar>
+   * </kpartgui>
+   * \endverbatim
+   *
+   * This tag will get expanded to a list of actions.  In the example
+   * above ( a file manager with a dynamic file menu ), you would call
+   * \code
+   * QPtrList<KAction> file_actions;
+   * for( ... )
+   *   if( ... )
+   *     file_actions.append( cool_action );
+   * unplugActionList( "xxx_file_actionlist" );
+   * plugActionList( "xxx_file_actionlist", file_actions );
+   * \endcode
+   * every time a file is selected, unselected or ...
+   *
+   * \note You should not call createGUI() after calling this
+   *       function.  In fact, that would remove the newly added
+   *       actionlists again...
+   * \note Forgetting to call unplugActionList() before
+   *       plugActionList() would leave the previous actions in the
+   *       menu too..
+   */
+  void plugActionList( const QString &name, const QPtrList<KAction> &actionList );
+
+  /**
+   * The complement of \ref plugActionList() ...
+   */
+  void unplugActionList( const QString &name );
+
+//US  static QString findMostRecentXMLFile( const QStringList &files, QString &doc );
+
+  void addStateActionEnabled(const QString& state, const QString& action);
+
+  void addStateActionDisabled(const QString& state, const QString& action);
+
+  enum ReverseStateChange { StateNoReverse, StateReverse };
+  struct StateChange
+  {
+    QStringList actionsToEnable;
+    QStringList actionsToDisable;
+  };
+
+  StateChange getActionsToChangeForState(const QString& state);
+
+  /// @since 3.1
+//US  void beginXMLPlug( QWidget * );
+  /// @since 3.1
+//US  void endXMLPlug();
+  /// @since 3.1
+//US  void prepareXMLUnplug( QWidget * );
+
+protected:
+  /**
+   * Returns true if client was added to super client list.
+   * Returns false if client was already in list.
+   */
+  //bool addSuperClient( KXMLGUIClient * );
+
+  /**
+   * Sets the instance (@ref KInstance) for this part.
+   *
+   * Call this first in the inherited class constructor.
+   * (At least before @ref setXMLFile().)
+   */
+//US  virtual void setInstance( KInstance *instance );
+
+  /**
+   * Sets the name of the rc file containing the XML for the part.
+   *
+   * Call this in the Part-inherited class constructor.
+   *
+   * @param file Either an absolute path for the file, or simply the
+   *             filename, which will then be assumed to be installed
+   *             in the "data" resource, under a directory named like
+   *             the instance.
+   * @param setXML Specify whether to call setXML. Default is true.
+   *               and the DOM document at once.
+   **/
+//US  virtual void setXMLFile( const QString& file, bool merge = false, bool setXMLDoc = true );
+
+//US  virtual void setLocalXMLFile( const QString &file );
+
+  /**
+   * Sets the XML for the part.
+   *
+   * Call this in the Part-inherited class constructor if you
+   *  don't call @ref setXMLFile().
+   **/
+//US  virtual void setXML( const QString &document, bool merge = false );
+
+  /**
+   * Sets the Document for the part, describing the layout of the GUI.
+   *
+   * Call this in the Part-inherited class constructor if you don't call
+   * @ref setXMLFile or @ref setXML .
+   */
+//US  virtual void setDOMDocument( const QDomDocument &document, bool merge = false );
+
+  /**
+   * This function will attempt to give up some memory after the GUI
+   * is built.  It should never be used in apps where the GUI may be
+   * rebuilt at some later time (components, for instance).
+   */
+//US  virtual void conserveMemory();
+
+  /**
+   * Actions can collectively be assigned a "State". To accomplish this
+   * the respective actions are tagged as <enable> or <disable> in
+   * a <State> </State> group of the XMLfile. During program execution the
+   * programmer can call stateChanged() to set actions to a defined state.
+   *
+   * @param newstate Name of a State in the XMLfile.
+   * @param reverse If the flag reverse is set to StateReverse, the State is reversed.
+   * (actions to be enabled will be disabled and action to be disabled will be enabled)
+   * Default is reverse=false.
+   */
+   virtual void stateChanged(const QString &newstate, ReverseStateChange reverse = StateNoReverse);
+
+   // Use this one for KDE 4.0
+   //virtual void stateChanged(const QString &newstate, bool reverse = false);
+
+private:
+/*US  
+  struct DocStruct
+  {
+    QString file;
+    QString data;
+  };
+
+  bool mergeXML( QDomElement &base, const QDomElement &additive,
+                 KActionCollection *actionCollection );
+
+  QDomElement findMatchingElement( const QDomElement &base,
+                                   const QDomElement &additive );
+*/
+  typedef QMap<QString, QMap<QString, QString> > ActionPropertiesMap;
+
+//US  static ActionPropertiesMap extractActionProperties( const QDomDocument &doc );
+
+//US  static void storeActionProperties( QDomDocument &doc, const ActionPropertiesMap &properties );
+
+//US  static QString findVersionNumber( const QString &_xml );
+
+  // Actions to enable/disable on a state change
+  QMap<QString,StateChange> m_actionsStateMap;
+
+protected:
+  virtual void virtual_hook( int id, void* data );
+private:
+  KXMLGUIClientPrivate *d;
+};
+
+#endif