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/*
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* This file is part of the KDE libraries
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* Copyright (C) 2000 Yves Arrouye <yves@realnames.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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**/
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#ifndef __kurifilter_h__
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#define __kurifilter_h__ "$Id: kurifilter.h,v 1.27.2.1 2003/06/06 09:12:16 mueller Exp $"
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#include <tqstringlist.h>
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#include <tqobject.h>
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#include <kurl.h>
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class KURIFilterPrivate;
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class KURIFilterDataPrivate;
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class TQStringList;
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class KCModule;
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/**
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* This is a basic message object used for exchanging filtering
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* information between the filter plugins and the application
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* whenever the application requires more information about the
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* URI than just a filtered version of it. Any application can
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* create an instance of this class and send it to @ref KURIFilter
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* to have the filter plugins fill the necessary information.
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*
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* @sect Example
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* <pre>
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* TQString text = "kde.org";
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* KURIFilterData d = text;
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* bool filtered = KURIFilter::self()->filter( d );
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* if( filtered )
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* print ( "URI: %s\n"Filtered URI: %s\n URI Type: %i\n"Was Filtered: %i"
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* text.latin1(), d.uri().url().latin1(), d.uriType(), filtered );
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* </pre>
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*
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* The above code should yield the following output:
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* <pre>
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* URI: kde.org
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* Filtered URI: http://kde.org
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* URI Type: 0 <== means NET_PROTOCOL
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* Was Filtered: 1 <== means the URL was successfully filtered
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* </pre>
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*
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* @short A message object for exchanging filtering URI info.
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*/
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class KURIFilterData
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{
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friend class KURIFilterPlugin;
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public:
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/**
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* Describes the type of URI to be filtered.
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*
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* This enumerator prvoides the return value for
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* @ref uriType. A brief description for each value:
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*
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* @li NET_PROTOCOL - Any network protocol: http, ftp, nttp, pop3, etc...
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* @li LOCAL_FILE - A local file whose executable flag is not set
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* @li LOCAL_DIR - A local directory
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* @li EXECUTABLE - A local file whose executable flag is set
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* @li HELP - A man or info page
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* @li SHELL - A shell executable (ex: echo "Test..." >> ~/testfile)
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* @li BLOCKED - A URI that should be blocked/filtered (ex: ad filtering)
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* @li ERROR - An incorrect URI (ex: "~johndoe" when user johndoe
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* does not exist in that system )
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* @li UNKNOWN - A URI that is not identified. Default value when
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* a KURIFilterData is first created.
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*/
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enum URITypes { NET_PROTOCOL=0, LOCAL_FILE, LOCAL_DIR, EXECUTABLE, HELP, SHELL, BLOCKED, ERROR, UNKNOWN };
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/**
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* Default constructor.
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*
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* Creates a URIFilterData object.
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*/
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KURIFilterData() { init(); }
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/**
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* Creates a URIFilterData object from the given URL.
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*
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* @param url is the URL to be filtered.
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*/
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KURIFilterData( const KURL& url ) { init( url); }
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/**
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* Creates a URIFilterData object from the given string.
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*
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* @param url is the string to be filtered.
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*/
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KURIFilterData( const TQString& url ) { init( url ); }
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/**
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* Copy constructor.
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*
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* Creates a URIFilterData object from another
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* URI filter data object.
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*
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* @param data the uri filter data to be copied.
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*/
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KURIFilterData( const KURIFilterData& /*data*/);
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/**
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* Destructor.
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*/
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~KURIFilterData();
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/**
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* This method has been deprecated and will always return
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* TRUE. You should instead use the result from the
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* @ref KURIFilter::filterURI() calls.
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*
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* @deprecated
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*/
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bool hasBeenFiltered() const { return m_bFiltered; }
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/**
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* Returns the filtered or the original URL.
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*
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* This function returns the filtered url if one
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* of the plugins sucessfully filtered the original
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* URL. Otherwise, it returns the original URL.
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* See @ref #hasBeenFiltered() and
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*
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* @return the filtered or original url.
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*/
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KURL uri() const { return m_pURI; }
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/**
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* Returns an error message.
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*
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* This functions returns the error message set
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* by the plugin whenever the uri type is set to
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* KURIFilterData::ERROR. Otherwise, it returns
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* a TQString::null.
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*
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* @return the error message or a NULL when there is none.
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*/
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TQString errorMsg() const { return m_strErrMsg; }
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/**
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* Returns the URI type.
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*
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* This method always returns KURIFilterData::UNKNOWN
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* if the given URL was not filtered.
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*/
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URITypes uriType() const { return m_iType; }
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/**
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* Sets the URL to be filtered.
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*
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* Use this function to set the string to be
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* filtered when you construct an empty filter
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* object.
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*
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* @param url the string to be filtered.
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*/
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void setData( const TQString& url ) { init( url ); }
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/**
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* Same as above except the argument is a URL.
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*
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* Use this function to set the string to be
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* filtered when you construct an empty filter
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* object.
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*
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* @param url the URL to be filtered.
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*/
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void setData( const KURL& url ) { init( url ); }
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/**
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* Sets the absolute path to be used whenever the supplied
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* data is a relative local URL.
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*
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* NOTE: This function works only for a local resource and
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* expects the absolute path to the relative URL set in this
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* meta object. If you are extracting the absolute path from
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* a KURL object, make sure you always set the argument below
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* using KURL::path() instead of KURL::url() so that "file:/"
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* would not be appended! Otherwise, the filter might not be
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* able to make correct determination whether the relative URL
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* locally exists!
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*
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* @param abs_path the abolute path to the local resource.
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* @return true if absolute path is successfully set. Otherwise, false.
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*/
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bool setAbsolutePath( const TQString& /* abs_path */ );
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/**
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* Returns the absolute path if one has already been set.
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*/
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TQString absolutePath() const;
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/**
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* Returns true if the supplied data has an absolute path.
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*/
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bool hasAbsolutePath() const;
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/**
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* Returns the command line options and arguments for a
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* local resource when present.
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*
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* @return options and arguments when present, otherwise TQString::null
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*/
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TQString argsAndOptions() const;
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/**
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* Returns true if the current data is a local resource with
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* command line options and arguments.
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*/
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bool hasArgsAndOptions() const;
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/**
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* Returns the name of the icon that matches
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* the current filtered URL.
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*
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* NOTE that this function will return a NULL
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* string by default and when no associated icon
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* is found.
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*
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* @return the name of the icon associated with the resource
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*/
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TQString iconName();
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/**
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* Overloaded assigenment operator.
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*
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* This function allows you to easily assign a KURL
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* to a KURIFilterData object.
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*
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* @return an instance of a KURIFilterData object.
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*/
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KURIFilterData& operator=( const KURL& url ) { init( url ); return *this; }
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/**
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* Overloaded assigenment operator.
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*
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* This function allows you to easily assign a TQString
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* to a KURIFilterData object.
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*
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* @return an instance of a KURIFilterData object.
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*/
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KURIFilterData& operator=( const TQString& url ) { init( url ); return *this; }
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protected:
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/**
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* Initializes the KURIFilterData on construction.
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*/
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void init( const KURL& url = TQString::null );
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private:
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bool m_bFiltered;
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bool m_bChanged;
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TQString m_strErrMsg;
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TQString m_strIconName;
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KURL m_pURI;
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URITypes m_iType;
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KURIFilterDataPrivate *d;
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};
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/**
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* Base class for URI filter plugins.
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*
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* This class applies a single filter to a URI. All
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* plugins designed to provide URI filtering functionalities
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* should inherit from this abstract class and provide a
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* specific filtering implementation.
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*
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* All inheriting classes need to implement the pure
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* virtual function @ref filterURI. Otherwise, they
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* would also become abstract.
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*
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* @short Abstract class for URI filter plugins.
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*/
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class KURIFilterPlugin : public TQObject
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{
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Q_OBJECT
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public:
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/**
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* Constructs a filter plugin with a given name and
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* priority.
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*
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* @param parent the parent object.
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* @param name the name of the plugin.
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* @param pri the priority of the plugin.
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*/
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KURIFilterPlugin( TQObject *parent = 0, const char *name = 0, double pri = 1.0 );
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/**
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* Returns the filter's name.
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*
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* @return A string naming the filter.
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*/
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virtual TQString name() const { return m_strName; }
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/**
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* Returns the filter's priority.
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*
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* Each filter has an assigned priority, a float from 0 to 1. Filters
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* with the lowest priority are first given a chance to filter a URI.
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*
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* @return The priority of the filter.
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*/
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virtual double priority() const { return m_dblPriority; }
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/**
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* Filters a URI.
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*
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* @param data the URI data to be filtered.
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* @return A boolean indicating whether the URI has been changed.
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*/
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virtual bool filterURI( KURIFilterData& data ) const = 0;
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/**
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* Creates a configuration module for the filter.
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*
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* It is the responsability of the caller to delete the module
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* once it is not needed anymore.
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*
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* @return A configuration module, @p null if the filter isn't configurable.
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*/
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virtual KCModule *configModule( TQWidget*, const char* ) const { return 0; }
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/**
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* Returns the name of the configuration module for the filter.
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*
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* @return the name of a configuration module or @p null if none.
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*/
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virtual TQString configName() const { return name(); }
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protected:
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/**
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* Sets the the URL in @p data to @p uri.
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*/
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void setFilteredURI ( KURIFilterData& data, const KURL& uri ) const;
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/**
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* Sets the error message in @p data to @p errormsg.
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*/
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void setErrorMsg ( KURIFilterData& data, const TQString& errmsg ) const {
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data.m_strErrMsg = errmsg;
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}
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/**
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* Sets the URI type in @p data to @p type.
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*/
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void setURIType ( KURIFilterData& data, KURIFilterData::URITypes type) const {
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data.m_iType = type;
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data.m_bChanged = true;
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}
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/**
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* Sets the arguments and options string in @p data
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* to @p args if any were found during filterting.
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*/
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void setArguments( KURIFilterData& data, const TQString& args ) const;
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TQString m_strName;
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double m_dblPriority;
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protected:
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virtual void virtual_hook( int id, void* data );
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private:
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class KURIFilterPluginPrivate *d;
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};
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class KURIFilterPluginList : public TQPtrList<KURIFilterPlugin>
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{
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public:
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virtual int compareItems(Item a, Item b)
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{
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double diff = ((KURIFilterPlugin *) a)->priority() - ((KURIFilterPlugin *) b)->priority();
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return diff < 0 ? -1 : (diff > 0 ? 1 : 0);
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}
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private:
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KURIFilterPrivate *d;
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};
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/**
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* Manages the filtering of a URI.
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*
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* The intention of this plugin class is to allow people to extend
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* the functionality of KURL without modifying it directly. This
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* way KURL will remain a generic parser capable of parsing any
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* generic URL that adheres to specifications.
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*
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* The KURIFilter class applies a number of filters to a URI,
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* and returns the filtered version whenever possible. The filters
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* are implemented using plugins to provide easy extensibility
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* of the filtering mechanism. That is, new filters can be added in
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* the future by simply inheriting from @ref KURIFilterPlugin and
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* implementing the @ref KURIFilterPlugin::filterURI method.
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*
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* Use of this plugin-manager class is straight forward. Since
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* it is a singleton object, all you have to do is obtain an instance
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* by doing @p KURIFilter::self() and use any of the public member
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* functions to preform the filtering.
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*
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* @sect Example
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*
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* To simply filter a given string:
|
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* <pre>
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|
* bool filtered = KURIFilter::self()->filterURI( "kde.org" );
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|
* </pre>
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*
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* You can alternatively use a KURL:
|
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|
* <pre>
|
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|
* KURL url = "kde.org";
|
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|
|
* bool filtered = KURIFilter::self()->filterURI( url );
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|
|
* </pre>
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*
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* If you have a constant string or a constant URL,
|
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|
|
* simply invoke the corresponding function to obtain
|
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|
|
* the filtered string or URL instead of a boolean flag:
|
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|
|
* <pre>
|
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|
* TQString u = KURIFilter::self()->filteredURI( "kde.org" );
|
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|
|
* </pre>
|
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|
|
*
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|
* You can also specify only specific filter(s) to be applied
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|
* by supplying the name(s) of the filter(s). By defualt all
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|
* filters that are found are loaded when the KURIFilter object
|
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|
|
* is created will be used. These names are taken from the
|
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|
|
* enteries in the \".desktop\" files. Here are a couple of
|
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|
|
* examples:
|
|
|
|
* <pre>
|
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|
|
* TQString text = "kde.org";
|
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|
|
* bool filtered = KURIFilter::self()->filterURI( text, "KShortURIFilter" );
|
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|
|
*
|
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|
|
* TQStringList list;
|
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|
|
* list << "KShortURIFilter" << "MyFilter";
|
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|
|
* bool filtered = KURIFilter::self()->filterURI( text, list );
|
|
|
|
* </pre>
|
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|
|
*
|
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|
|
* KURIFilter also allows richer data exchange through a simple
|
|
|
|
* meta-object called @p KURIFilterData. Using this meta-object
|
|
|
|
* you can find out more information about the URL you want to
|
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|
|
* filter. See @ref KURIFilterData for examples and details.
|
|
|
|
*
|
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|
|
* @short Filters a given URL into its proper format whenever possible.
|
|
|
|
*/
|
|
|
|
|
|
|
|
class KURIFilter
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
/**
|
|
|
|
* Destructor
|
|
|
|
*/
|
|
|
|
~KURIFilter ();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Return a static instance of KURIFilter.
|
|
|
|
*/
|
|
|
|
static KURIFilter* self();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Filters the URI given by the object URIFilterData.
|
|
|
|
*
|
|
|
|
* This filters the given data based on the specified
|
|
|
|
* filter list. If the list is empty all avaliable
|
|
|
|
* filter plugins would be used. If not, only those
|
|
|
|
* given in the list are used.
|
|
|
|
*
|
|
|
|
* @param data object that contains the URI to be filtered.
|
|
|
|
* @param filters specify the list filters to be used
|
|
|
|
*
|
|
|
|
* @return a boolean indicating whether the URI has been changed
|
|
|
|
*/
|
|
|
|
bool filterURI( KURIFilterData& data, const TQStringList& filters = TQStringList() );
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Filters the URI given by the URL.
|
|
|
|
*
|
|
|
|
* This filters the given URL based on the specified
|
|
|
|
* filter list. If the list is empty all avaliable
|
|
|
|
* filter plugins would be used. If not, only those
|
|
|
|
* given in the list are used.
|
|
|
|
*
|
|
|
|
* @param uri the URI to filter.
|
|
|
|
* @param filters specify the list of filters to be used
|
|
|
|
*
|
|
|
|
* @return a boolean indicating whether the URI has been changed
|
|
|
|
*/
|
|
|
|
bool filterURI( KURL &uri, const TQStringList& filters = TQStringList() );
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Filters a string representing a URI.
|
|
|
|
*
|
|
|
|
* This filters the given string based on the specified
|
|
|
|
* filter list. If the list is empty all avaliable
|
|
|
|
* filter plugins would be used. If not, only those
|
|
|
|
* given in the list are used.
|
|
|
|
*
|
|
|
|
* @param uri The URI to filter.
|
|
|
|
* @param filters specify the list filters to be used
|
|
|
|
*
|
|
|
|
* @return a boolean indicating whether the URI has been changed
|
|
|
|
*/
|
|
|
|
bool filterURI( TQString &uri, const TQStringList& filters = TQStringList() );
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns the filtered URI.
|
|
|
|
*
|
|
|
|
* This filters the given URL based on the specified
|
|
|
|
* filter list. If the list is empty all avaliable
|
|
|
|
* filter plugins would be used. If not, only those
|
|
|
|
* given in the list are used.
|
|
|
|
*
|
|
|
|
* @param uri The URI to filter.
|
|
|
|
* @param filters specify the list filters to be used
|
|
|
|
*
|
|
|
|
* @return the filtered URI or null if it cannot be filtered
|
|
|
|
*/
|
|
|
|
KURL filteredURI( const KURL &uri, const TQStringList& filters = TQStringList() );
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Return a filtered string representation of a URI.
|
|
|
|
*
|
|
|
|
* This filters the given URL based on the specified
|
|
|
|
* filter list. If the list is empty all avaliable
|
|
|
|
* filter plugins would be used. If not, only those
|
|
|
|
* given in the list are used.
|
|
|
|
*
|
|
|
|
* @param uri the URI to filter.
|
|
|
|
* @param filters specify the list filters to be used
|
|
|
|
*
|
|
|
|
* @return the filtered URI or null if it cannot be filtered
|
|
|
|
*/
|
|
|
|
TQString filteredURI( const TQString &uri, const TQStringList& filters = TQStringList() );
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Return an iterator to iterate over all loaded
|
|
|
|
* plugins.
|
|
|
|
*
|
|
|
|
* @return a plugin iterator.
|
|
|
|
*/
|
|
|
|
TQPtrListIterator<KURIFilterPlugin> pluginsIterator() const;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Return a list of the names of all loaded plugins
|
|
|
|
*
|
|
|
|
* @since 3.1
|
|
|
|
*
|
|
|
|
* @return a TQStringList of plugin names
|
|
|
|
*/
|
|
|
|
TQStringList pluginNames() const;
|
|
|
|
|
|
|
|
protected:
|
|
|
|
|
|
|
|
/**
|
|
|
|
* A protected constructor.
|
|
|
|
*
|
|
|
|
* This constructor creates a KURIFilter and
|
|
|
|
* initializes all plugins it can find by invoking
|
|
|
|
* @ref loadPlugins.
|
|
|
|
*/
|
|
|
|
KURIFilter();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Loads all allowed plugins.
|
|
|
|
*
|
|
|
|
* This function loads all filters that have not
|
|
|
|
* been dis
|
|
|
|
*/
|
|
|
|
void loadPlugins();
|
|
|
|
|
|
|
|
private:
|
|
|
|
|
|
|
|
static KURIFilter *m_self;
|
|
|
|
KURIFilterPluginList m_lstPlugins;
|
|
|
|
KURIFilterPrivate *d;
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|