browserextension.h

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

/* This file is part of the KDE project
   Copyright (C) 1999 Simon Hausmann <[e-mail]>
                      David Faure <[e-mail]>

   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; 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 __kparts_browserextension_h__
#define __kparts_browserextension_h__

#include <sys/types.h>

#include <qpoint.h>
#include <qptrlist.h>
#include <qdatastream.h>
#include <qstringlist.h>
#include <qpair.h>

#include <kparts/part.h>
#include <kparts/event.h>

class KFileItem;
typedef QPtrList<KFileItem> KFileItemList;
class QString;

namespace KParts {

class BrowserInterface;

struct URLArgsPrivate;

/**
 * URLArgs is a set of arguments bundled into a structure,
 * to allow specifying how a URL should be opened by openURL().
 * In other words, this is like arguments to openURL(), but without
 * have to change the signature of openURL() (since openURL is a
 * generic KParts method).
 * The parts (with a browser extension) who care about urlargs will
 * use those arguments, others will ignore them.
 *
 * This can also be used the other way round, when a part asks
 * for a URL to be opened (with openURLRequest or createNewWindow).
 */
struct KPARTS_EXPORT URLArgs
{
  URLArgs();
  URLArgs( const URLArgs &args );
  URLArgs &operator=( const URLArgs &args);

  URLArgs( bool reload, int xOffset, int yOffset, const QString &serviceType = QString::null );
  virtual ~URLArgs();

  /**
   * This buffer can be used by the part to save and restore its contents.
   * See KHTMLPart for instance.
   */
  QStringList docState;

  /**
   * @p reload is set when the cache shouldn't be used (forced reload).
   */
  bool reload;
  /**
   * @p xOffset is the horizontal scrolling of the part's widget
   * (in case it's a scrollview). This is saved into the history
   * and restored when going back in the history.
   */
  int xOffset;
  /**
   * @p yOffset vertical scrolling position, xOffset.
   */
  int yOffset;
  /**
   * The servicetype (usually mimetype) to use when opening the next URL.
   */
  QString serviceType;

  /**
   * KHTML-specific field, contents of the HTTP POST data.
   */
  QByteArray postData;

  /**
   * KHTML-specific field, header defining the type of the POST data.
   */
  void setContentType( const QString & contentType );
  /**
   * KHTML-specific field, header defining the type of the POST data.
   */
  QString contentType() const;
  /**
   * KHTML-specific field, whether to do a POST instead of a GET,
   * for the next openURL.
   */
  void setDoPost( bool enable );

  /**
   * KHTML-specific field, whether to do a POST instead of a GET,
   * for the next openURL.
   */
  bool doPost() const;

  /**
   * Whether to lock the history when opening the next URL.
   * This is used during e.g. a redirection, to avoid a new entry
   * in the history.
   */
  void setLockHistory( bool lock );
  bool lockHistory() const;

  /**
   * Whether the URL should be opened in a new tab instead in a new window.
   */
  void setNewTab( bool newTab );
  bool newTab() const;

  /**
   * Meta-data to associate with the next KIO operation
   * @see KIO::TransferJob etc.
   */
  QMap<QString, QString> &metaData();

  /**
   * The frame in which to open the URL. KHTML/Konqueror-specific.
   */
  QString frameName;

  /**
   * If true, the part who asks for a URL to be opened can be 'trusted'
   * to execute applications. For instance, the directory views can be
   * 'trusted' whereas HTML pages are not trusted in that respect.
   */
  bool trustedSource;

  /**
   * @return true if the request was a result of a META refresh/redirect request or
   * HTTP redirect.
   */
  bool redirectedRequest () const;

  /**
   * Set the redirect flag to indicate URL is a result of either a META redirect
   * or HTTP redirect.
   *
   * @param redirected
   */
  void setRedirectedRequest(bool redirected);

  /**
   * Set whether the URL specifies to be opened in a new window
   * @since 3.4
   */
  void setForcesNewWindow( bool forcesNewWindow );

  /**
   * Whether the URL specifies to be opened in a new window
   * @since 3.4
   */
  bool forcesNewWindow() const;

  URLArgsPrivate *d;
};

struct WindowArgsPrivate;

/**
 * The WindowArgs are used to specify arguments to the "create new window"
 * call (see the createNewWindow variant that uses WindowArgs).
 * The primary reason for this is the javascript window.open function.
 */
struct KPARTS_EXPORT WindowArgs
{
    WindowArgs();
    ~WindowArgs();
    WindowArgs( const WindowArgs &args );
    WindowArgs &operator=( const WindowArgs &args );
    WindowArgs( const QRect &_geometry, bool _fullscreen, bool _menuBarVisible,
                bool _toolBarsVisible, bool _statusBarVisible, bool _resizable );
    WindowArgs( int _x, int _y, int _width, int _height, bool _fullscreen,
                bool _menuBarVisible, bool _toolBarsVisible,
                bool _statusBarVisible, bool _resizable );

    // Position
    int x;
    int y;
    // Size
    int width;
    int height;
    bool fullscreen; //defaults to false
    bool menuBarVisible; //defaults to true
    bool toolBarsVisible; //defaults to true
    bool statusBarVisible; //defaults to true
    bool resizable; //defaults to true

    bool lowerWindow; //defaults to false
    bool scrollBarsVisible; //defaults to true

    WindowArgsPrivate *d; // don't use before KDE4, many KDE-3.x didn't have an explicit destructor
};

/**
 * The KParts::OpenURLEvent event informs that a given part has opened a given URL.
 * Applications can use this event to send this information to interested plugins.
 *
 * The event should be sent before opening the URL in the part, so that the plugins
 * can use part()->url() to get the old URL.
 */
class KPARTS_EXPORT OpenURLEvent : public Event
{
public:
  OpenURLEvent( ReadOnlyPart *part, const KURL &url, const URLArgs &args = URLArgs() );
  virtual ~OpenURLEvent();

  ReadOnlyPart *part() const { return m_part; }
  KURL url() const { return m_url; }
  URLArgs args() const { return m_args; }

  static bool test( const QEvent *event ) { return Event::test( event, s_strOpenURLEvent ); }

private:
  static const char *s_strOpenURLEvent;
  ReadOnlyPart *m_part;
  KURL m_url;
  URLArgs m_args;

  class OpenURLEventPrivate;
  OpenURLEventPrivate *d;
};

class BrowserExtensionPrivate;

 /**
  * The Browser Extension is an extension (yes, no kidding) to
  * KParts::ReadOnlyPart, which allows a better integration of parts
  * with browsers (in particular Konqueror).
  * Remember that ReadOnlyPart only has openURL(KURL), with no other settings.
  * For full-fledged browsing, we need much more than that, including
  * many arguments about how to open this URL (see URLArgs), 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 KURL &) : Paste clipboard into given URL.
  * @li @p rename : Rename item in place.
  * @li @p trash : Move selected items to trash.
  * @li @p del : Delete selected items (couldn't call it delete!).
  * @li @p shred : Shred selected items (secure deletion) - DEPRECATED.
  * @li @p properties : Show file/document properties.
  * @li @p editMimeType : show file/document's mimetype properties.
  * @li @p searchProvider : Lookup selected text at default search provider
  *
  * [normal actions]
  * @li @p print : Print :-)
  * @li @p reparseConfiguration : Re-read configuration and apply it.
  * @li @p refreshMimeTypes : If the view uses mimetypes it should re-determine them.
  *
  *
  * 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.
  * You need to enable 'print' when printing is possible - you can even do that
  * in the constructor.
  *
  * A special case is the configuration slots, not connected to any action directly,
  * and having parameters.
  *
  * [configuration slot]
  * @li @p setSaveViewPropertiesLocally( bool ): If @p true, view properties are saved into .directory
  *                                       otherwise, they are saved globally.
  * @li @p disableScrolling: no scrollbars
  */
class KPARTS_EXPORT BrowserExtension : public QObject
{
  Q_OBJECT
  Q_PROPERTY( bool urlDropHandling READ isURLDropHandlingEnabled WRITE setURLDropHandlingEnabled )
public:
  /**
   * Constructor
   *
   * @param parent The KParts::ReadOnlyPart that this extension ... "extends" :)
   * @param name An optional name for the extension.
   */
  BrowserExtension( KParts::ReadOnlyPart *parent,
                    const char *name = 0L );


  virtual ~BrowserExtension();

  typedef uint PopupFlags;

  /**
   * Set of flags passed via the popupMenu signal, to ask for some items in the popup menu.
   * DefaultPopupItems: default value, no additional menu item
   * ShowNavigationItems: show "back" and "forward" (usually done when clicking the background of the view, but not an item)
   * ShowUp: show "up" (same thing, but not over e.g. HTTP). Requires ShowNavigationItems.
   * ShowReload: show "reload" (usually done when clicking the background of the view, but not an item)
   * ShowBookmark: show "add to bookmarks" (usually not done on the local filesystem)
   * ShowCreateDirectory: 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: set when selecting text, for a popup that only contains text-related items.
   * NoDeletion: 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)
   *
   * KDE4 TODO: add IsLink flag, for "Bookmark This Link" and linkactions merging group.
   *                    [currently it depends on which signal is emitted]
   *            add ShowURLOperation flags for copy,cut,paste,rename,trash,del [same thing]
   */
  enum { DefaultPopupItems=0x0000, ShowNavigationItems=0x0001,
         ShowUp=0x0002, ShowReload=0x0004, ShowBookmark=0x0008,
         ShowCreateDirectory=0x0010, ShowTextSelectionItems=0x0020,
         NoDeletion=0x0040 ///< @since 3.4
       };


  /**
   * Set the parameters to use for opening the next URL.
   * This is called by the "hosting" application, to pass parameters to the part.
   * @see URLArgs
   */
  virtual void setURLArgs( const URLArgs &args );

  /**
   * Retrieve the set of parameters to use for opening the URL
   * (this must be called from openURL() in the part).
   * @see URLArgs
   */
  URLArgs urlArgs() const;

  /**
   * 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 );