File indexing completed on 2024-05-12 07:51:58

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 1999 Simon Hausmann <hausmann@kde.org>
     SPDX-FileCopyrightText: 1999 David Faure <faure@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef KPARTS_NAVIGATIONEXTENSION
 #define KPARTS_NAVIGATIONEXTENSION
 
 #include <kparts/openurlarguments.h>
 #include <kparts/readonlypart.h>
 
 #include <memory>
 
 #include <QAction>
 #include <qplatformdefs.h> //mode_t
 
 template<class Key, class T>
 class QMap;
 template<typename T>
 class QList;
 
 class KFileItem;
 class KFileItemList;
 class QDataStream;
 class QPoint;
 
 namespace KParts
 {
 class NavigationExtensionPrivate;
 
 /**
  * @class NavigationExtension navigationextension.h <KParts/NavigationExtension>
  *
  * @short An extension to  KParts::ReadOnlyPart, which allows a better integration of parts
  * with browsers (in particular Konqueror).
  *
  * Remember that ReadOnlyPart only has openUrl(QUrl) and a few arguments() but not much more.
  * For full-fledged browsing, we need much more than that, including
  * enabling/disabling of standard actions (print, copy, paste...),
  * allowing parts to save and restore their data into the back/forward history,
  * allowing parts to control the location bar URL, to requests URLs
  * to be opened by the hosting browser, etc.
  *
  * The part developer needs to define its own class derived from BrowserExtension,
  * to implement the virtual methods [and the standard-actions slots, see below].
  *
  * The way to associate the BrowserExtension with the part is to simply
  * create the BrowserExtension as a child of the part (in QObject's terms).
  * The hosting application will look for it automatically.
  *
  * Another aspect of the browser integration is that a set of standard
  * actions are provided by the browser, but implemented by the part
  * (for the actions it supports).
  *
  * The following standard actions are defined by the host of the view:
  *
  * [selection-dependent actions]
  * @li @p cut : Copy selected items to clipboard and store 'not cut' in clipboard.
  * @li @p copy : Copy selected items to clipboard and store 'cut' in clipboard.
  * @li @p paste : Paste clipboard into view URL.
  * @li @p pasteTo(const QUrl &) : Paste clipboard into given URL.
  * @li @p searchProvider : Lookup selected text at default search provider
  *
  * [normal actions]
  * @li None anymore.
  *
  *
  * The view defines a slot with the name of the action in order to implement the action.
  * The browser will detect the slot automatically and connect its action to it when
  * appropriate (i.e. when the view is active).
  *
  *
  * The selection-dependent actions are disabled by default and the view should
  * enable them when the selection changes, emitting enableAction().
  *
  * The normal actions do not depend on the selection.
  *
  * A special case is the configuration slots, not connected to any action directly.
  *
  * [configuration slot]
  * @li @p reparseConfiguration : Re-read configuration and apply it.
  * @li @p disableScrolling: no scrollbars
  */
 class KPARTS_EXPORT NavigationExtension : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(bool urlDropHandling READ isURLDropHandlingEnabled WRITE setURLDropHandlingEnabled)
 public:
     /**
      * Constructor
      *
      * @param parent The KParts::ReadOnlyPart that this extension ... "extends" :)
      */
     explicit NavigationExtension(KParts::ReadOnlyPart *parent);
 
     ~NavigationExtension() override;
 
     /**
      * Set of flags passed via the popupMenu signal, to ask for some items in the popup menu.
      * @see PopupFlags
      */
     enum PopupFlag {
         DefaultPopupItems = 0x0000, /**< default value, no additional menu item */
         ShowBookmark = 0x0008, /**< show "add to bookmarks" (usually not done on the local filesystem) */
         ShowCreateDirectory = 0x0010, /**<  show "create directory" (usually only done on the background of the view, or
                                        *                      in hierarchical views like directory trees, where the new dir would be visible) */
         ShowTextSelectionItems = 0x0020, /**< set when selecting text, for a popup that only contains text-related items. */
         NoDeletion = 0x0040, /**< deletion, trashing and renaming not allowed (e.g. parent dir not writeable).
                               *            (this is only needed if the protocol itself supports deletion, unlike e.g. HTTP) */
         IsLink = 0x0080, /**< show "Bookmark This Link" and other link-related actions (linkactions merging group) */
         ShowUrlOperations = 0x0100, /**< show copy, paste, as well as cut if NoDeletion is not set. */
         ShowProperties = 0x200, /**< show "Properties" action (usually done by directory views) */
     };
 
     /**
      * Stores a combination of #PopupFlag values.
      */
     Q_DECLARE_FLAGS(PopupFlags, PopupFlag)
 
     /**
      * Returns the current x offset.
      *
      * For a scrollview, implement this using contentsX().
      */
     virtual int xOffset();
     /**
      * Returns the current y offset.
      *
      * For a scrollview, implement this using contentsY().
      */
     virtual int yOffset();
 
     /**
      * Used by the browser to save the current state of the view
      * (in order to restore it if going back in navigation).
      *
      * If you want to save additional properties, reimplement it
      * but don't forget to call the parent method (probably first).
      */
     virtual void saveState(QDataStream &stream);
 
     /**
      * Used by the browser to restore the view in the state
      * it was when we left it.
      *
      * If you saved additional properties, reimplement it
      * but don't forget to call the parent method (probably first).
      */
     virtual void restoreState(QDataStream &stream);
 
     /**
      * Returns whether url drop handling is enabled.
      * See setURLDropHandlingEnabled for more information about this
      * property.
      */
     bool isURLDropHandlingEnabled() const;
 
     /**
      * Enables or disables url drop handling. URL drop handling is a property
      * describing whether the hosting shell component is allowed to install an
      * event filter on the part's widget, to listen for URI drop events.
      * Set it to true if you are exporting a BrowserExtension implementation and
      * do not provide any special URI drop handling. If set to false you can be
      * sure to receive all those URI drop events unfiltered. Also note that the
      * implementation as of Konqueror installs the event filter only on the part's
      * widget itself, not on child widgets.
      */
     void setURLDropHandlingEnabled(bool enable);
 
     /**
      * @return the status (enabled/disabled) of an action.
      * When the enableAction signal is emitted, the browserextension
      * stores the status of the action internally, so that it's possible
      * to query later for the status of the action, using this method.
      */
     bool isActionEnabled(const char *name) const;
 
     /**
      * @return the text of an action, if it was set explicitly by the part.
      * When the setActionText signal is emitted, the browserextension
      * stores the text of the action internally, so that it's possible
      * to query later for the text of the action, using this method.
      */
     QString actionText(const char *name) const;
 
     typedef QMap<QByteArray, QByteArray> ActionSlotMap;
 
     /**
      * Returns a pointer to the static map containing the action names as keys and corresponding
      * SLOT()'ified method names as data entries.
      * The map is created if it doesn't exist yet.
      *
      * This is very useful for
      * the host component, when connecting the own signals with the
      * extension's slots.
      * Basically you iterate over the map, check if the extension implements
      * the slot and connect to the slot using the data value of your map
      * iterator.
      * Checking if the extension implements a certain slot can be done like this:
      *
      * \code
      *   extension->metaObject()->slotNames().contains( actionName + "()" )
      * \endcode
      *
      * (note that @p actionName is the iterator's key value if already
      *  iterating over the action slot map, returned by this method)
      *
      * Connecting to the slot can be done like this:
      *
      * \code
      *   connect( yourObject, SIGNAL( yourSignal() ),
      *            extension, mapIterator.data() )
      * \endcode
      *
      * (where "mapIterator" is your ActionSlotMap iterator)
      */
     static ActionSlotMap *actionSlotMap();
 
     /**
      * Queries @p obj for a child object which inherits from this
      * BrowserExtension class. Convenience method.
      */
     static NavigationExtension *childObject(QObject *obj);
 
     /**
      * Asks the hosting browser to perform a paste (using openUrlRequestDelayed())
      */
     void pasteRequest();
 
     /**
      * Associates a list of actions with a predefined name known by the host's popupmenu:
      * "editactions" for actions related text editing,
      * "linkactions" for actions related to hyperlinks,
      * "partactions" for any other actions provided by the part
      */
     typedef QMap<QString, QList<QAction *>> ActionGroupMap;
 
 Q_SIGNALS:
     /**
      * Enables or disable a standard action held by the browser.
      *
      * See class documentation for the list of standard actions.
      */
     void enableAction(const char *name, bool enabled);
 
     /**
      * Change the text of a standard action held by the browser.
      * This can be used to change "Paste" into "Paste Image" for instance.
      *
      * See class documentation for the list of standard actions.
      */
     void setActionText(const char *name, const QString &text);
 
     /**
      * Asks the host (browser) to open @p url.
      * To set a reload, the x and y offsets, the service type etc., fill in the
      * appropriate fields in the @p args structure.
      * Hosts should not connect to this signal but to openUrlRequestDelayed().
      */
     void openUrlRequest(const QUrl &url, const KParts::OpenUrlArguments &arguments = KParts::OpenUrlArguments());
 
     /**
      * This signal is emitted when openUrlRequest() is called, after a 0-seconds timer.
      * This allows the caller to terminate what it's doing first, before (usually)
      * being destroyed. Parts should never use this signal, hosts should only connect
      * to this signal.
      */
     void openUrlRequestDelayed(const QUrl &url, const KParts::OpenUrlArguments &arguments);
 
     /**
      * Tells the hosting browser that the part opened a new URL (which can be
      * queried via KParts::Part::url().
      *
      * This helps the browser to update/create an entry in the history.
      * The part may @em not emit this signal together with openUrlRequest().
      * Emit openUrlRequest() if you want the browser to handle a URL the user
      * asked to open (from within your part/document). This signal however is
      * useful if you want to handle URLs all yourself internally, while still
      * telling the hosting browser about new opened URLs, in order to provide
      * a proper history functionality to the user.
      * An example of usage is a html rendering component which wants to emit
      * this signal when a child frame document changed its URL.
      * Conclusion: you probably want to use openUrlRequest() instead.
      */
     void openUrlNotify();
 
     /**
      * Updates the URL shown in the browser's location bar to @p url.
      */
     void setLocationBarUrl(const QString &url);
 
     /**
      * Sets the URL of an icon for the currently displayed page.
      */
     void setIconUrl(const QUrl &url);
 
     /**
      * Asks the hosting browser to open a new window for the given @p url
      * and return a reference to the content part.
      */
     void createNewWindow(const QUrl &url);
 
     /**
      * Since the part emits the jobid in the started() signal,
      * progress information is automatically displayed.
      *
      * However, if you don't use a KIO::Job in the part,
      * you can use loadingProgress() and speedProgress()
      * to display progress information.
      */
     void loadingProgress(int percent);
     /**
      * @see loadingProgress
      */
     void speedProgress(int bytesPerSecond);
 
     void infoMessage(const QString &);
 
     /**
      * Emit this to make the browser show a standard popup menu for the files @p items.
      *
      * @param global global coordinates where the popup should be shown
      * @param items list of file items which the popup applies to
      * @param args OpenUrlArguments, mostly for metadata here
      * @param flags enables/disables certain builtin actions in the popupmenu
      * @param actionGroups named groups of actions which should be inserted into the popup, see ActionGroupMap
      */
     void popupMenu(const QPoint &global,
                    const KFileItemList &items,
                    const KParts::OpenUrlArguments &arguments = KParts::OpenUrlArguments(),
                    KParts::NavigationExtension::PopupFlags flags = KParts::NavigationExtension::DefaultPopupItems,
                    const KParts::NavigationExtension::ActionGroupMap &actionGroups = ActionGroupMap());
 
     /**
      * Emit this to make the browser show a standard popup menu for the given @p url.
      *
      * Give as much information about this URL as possible,
      * like @p args.mimeType and the file type @p mode
      *
      * @param global global coordinates where the popup should be shown
      * @param url the URL this popup applies to
      * @param mode the file type of the url (S_IFREG, S_IFDIR...)
      * @param args OpenUrlArguments, set the mimetype of the URL using setMimeType()
      * @param flags enables/disables certain builtin actions in the popupmenu
      * @param actionGroups named groups of actions which should be inserted into the popup, see ActionGroupMap
      */
     void popupMenu(const QPoint &global,
                    const QUrl &url,
                    mode_t mode = static_cast<mode_t>(-1),
                    const KParts::OpenUrlArguments &arguments = KParts::OpenUrlArguments(),
                    KParts::NavigationExtension::PopupFlags flags = KParts::NavigationExtension::DefaultPopupItems,
                    const KParts::NavigationExtension::ActionGroupMap &actionGroups = ActionGroupMap());
 
     /**
      * Inform the hosting application about the current selection.
      * Used when a set of files/URLs is selected (with full information
      * about those URLs, including size, permissions etc.)
      */
     void selectionInfo(const KFileItemList &items);
 
     /**
      * Inform the hosting application that the user moved the mouse over an item.
      * Used when the mouse is on an URL.
      */
     void mouseOverInfo(const KFileItem &item);
 
     /**
      * Ask the hosting application to add a new HTML (aka Mozilla/Netscape)
      * SideBar entry.
      */
     void addWebSideBar(const QUrl &url, const QString &name);
 
     /**
      * Ask the hosting application to move the top level widget.
      */
     void moveTopLevelWidget(int x, int y);
 
     /**
      * Ask the hosting application to resize the top level widget.
      */
     void resizeTopLevelWidget(int w, int h);
 
     /**
      * Ask the hosting application to focus @p part.
      */
     void requestFocus(KParts::ReadOnlyPart *part);
 
     /**
      * Tell the host (browser) about security state of current page
      * enum PageSecurity { NotCrypted, Encrypted, Mixed };
      */
     void setPageSecurity(int);
 
     /**
      * Inform the host about items that have been removed.
      */
     void itemsRemoved(const KFileItemList &items);
 
 private Q_SLOTS:
     KPARTS_NO_EXPORT void slotOpenUrlRequest(const QUrl &url, const KParts::OpenUrlArguments &arguments = KParts::OpenUrlArguments());
 
     KPARTS_NO_EXPORT void slotEmitOpenUrlRequestDelayed();
     KPARTS_NO_EXPORT void slotEnableAction(const char *, bool);
     KPARTS_NO_EXPORT void slotSetActionText(const char *, const QString &);
 
 public:
     typedef QMap<QByteArray, int> ActionNumberMap;
 
 private:
     std::unique_ptr<NavigationExtensionPrivate> const d;
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(NavigationExtension::PopupFlags)
 
 }
 
 #endif