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313 lines
9.2 KiB
313 lines
9.2 KiB
/* -*- c++ -*-
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headerstrategy.cpp
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This file is part of KMail, the KDE mail client.
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Copyright (c) 2003 Marc Mutz <mutz@kde.org>
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KMail is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License, version 2, as
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published by the Free Software Foundation.
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KMail is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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In addition, as a special exception, the copyright holders give
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permission to link the code of this program with any edition of
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the Qt library by Trolltech AS, Norway (or with modified versions
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of Qt that use the same license as Qt), and distribute linked
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combinations including the two. You must obey the GNU General
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Public License in all respects for all of the code used other than
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Qt. If you modify this file, you may extend this exception to
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your version of the file, but you are not obligated to do so. If
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you do not wish to do so, delete this exception statement from
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your version.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "headerstrategy.h"
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#include "kmkernel.h"
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#include <kdebug.h>
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#include <kconfig.h>
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namespace KMail {
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//
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// Header tables:
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//
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static const char * briefHeaders[] = {
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"subject", "from", "cc", "bcc", "date"
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};
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static const int numBriefHeaders = sizeof briefHeaders / sizeof *briefHeaders;
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static const char * standardHeaders[] = {
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"subject", "from", "cc", "bcc", "to"
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};
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static const int numStandardHeaders = sizeof standardHeaders / sizeof *standardHeaders;
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static const char * richHeaders[] = {
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"subject", "date", "from", "cc", "bcc", "to",
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"organization", "organisation", "reply-to",
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"user-agent", "x-mailer"
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};
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static const int numRichHeaders = sizeof richHeaders / sizeof *richHeaders;
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//
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// Convenience function
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//
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static TQStringList stringList( const char * headers[], int numHeaders ) {
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TQStringList sl;
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for ( int i = 0 ; i < numHeaders ; ++i )
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sl.push_back( headers[i] );
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return sl;
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}
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//
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// AllHeaderStrategy:
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// show everything
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//
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class AllHeaderStrategy : public HeaderStrategy {
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friend class ::KMail::HeaderStrategy;
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protected:
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AllHeaderStrategy() : HeaderStrategy() {}
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virtual ~AllHeaderStrategy() {}
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public:
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const char * name() const { return "all"; }
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const HeaderStrategy * next() const { return rich(); }
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const HeaderStrategy * prev() const { return custom(); }
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DefaultPolicy defaultPolicy() const { return Display; }
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bool showHeader( const TQString & ) const {
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return true; // more efficient than default impl
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}
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};
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//
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// RichHeaderStrategy:
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// Date, Subject, From, To, CC, ### what exactly?
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//
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class RichHeaderStrategy : public HeaderStrategy {
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friend class ::KMail::HeaderStrategy;
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protected:
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RichHeaderStrategy()
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: HeaderStrategy(),
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mHeadersToDisplay( stringList( richHeaders, numRichHeaders ) ) {}
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virtual ~RichHeaderStrategy() {}
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public:
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const char * name() const { return "rich"; }
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const HeaderStrategy * next() const { return standard(); }
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const HeaderStrategy * prev() const { return all(); }
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TQStringList headersToDisplay() const { return mHeadersToDisplay; }
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DefaultPolicy defaultPolicy() const { return Hide; }
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private:
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const TQStringList mHeadersToDisplay;
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};
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//
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// StandardHeaderStrategy:
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// BCC, CC, Date, From, Subject, To
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//
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class StandardHeaderStrategy : public HeaderStrategy {
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friend class ::KMail::HeaderStrategy;
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protected:
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StandardHeaderStrategy()
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: HeaderStrategy(),
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mHeadersToDisplay( stringList( standardHeaders, numStandardHeaders) ) {}
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virtual ~StandardHeaderStrategy() {}
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public:
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const char * name() const { return "standard"; }
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const HeaderStrategy * next() const { return brief(); }
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const HeaderStrategy * prev() const { return rich(); }
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TQStringList headersToDisplay() const { return mHeadersToDisplay; }
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DefaultPolicy defaultPolicy() const { return Hide; }
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private:
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const TQStringList mHeadersToDisplay;
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};
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//
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// BriefHeaderStrategy
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// From, Subject, Date
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//
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class BriefHeaderStrategy : public HeaderStrategy {
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friend class ::KMail::HeaderStrategy;
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protected:
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BriefHeaderStrategy()
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: HeaderStrategy(),
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mHeadersToDisplay( stringList( briefHeaders, numBriefHeaders ) ) {}
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virtual ~BriefHeaderStrategy() {}
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public:
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const char * name() const { return "brief"; }
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const HeaderStrategy * next() const { return custom(); }
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const HeaderStrategy * prev() const { return standard(); }
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TQStringList headersToDisplay() const { return mHeadersToDisplay; }
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DefaultPolicy defaultPolicy() const { return Hide; }
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private:
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const TQStringList mHeadersToDisplay;
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};
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//
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// CustomHeaderStrategy
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// Determined by user
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//
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class CustomHeaderStrategy : public HeaderStrategy {
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friend class ::KMail::HeaderStrategy;
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protected:
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CustomHeaderStrategy();
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virtual ~CustomHeaderStrategy() {}
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public:
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const char * name() const { return "custom"; }
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const HeaderStrategy * next() const { return all(); }
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const HeaderStrategy * prev() const { return brief(); }
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TQStringList headersToDisplay() const { return mHeadersToDisplay; }
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TQStringList headersToHide() const { return mHeadersToHide; }
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DefaultPolicy defaultPolicy() const { return mDefaultPolicy; }
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private:
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TQStringList mHeadersToDisplay;
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TQStringList mHeadersToHide;
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DefaultPolicy mDefaultPolicy;
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};
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CustomHeaderStrategy::CustomHeaderStrategy()
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: HeaderStrategy()
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{
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KConfigGroup customHeader( KMKernel::config(), "Custom Headers" );
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if ( customHeader.hasKey( "headers to display" ) ) {
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mHeadersToDisplay = customHeader.readListEntry( "headers to display" );
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for ( TQStringList::iterator it = mHeadersToDisplay.begin() ; it != mHeadersToDisplay.end() ; ++ it )
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*it = (*it).lower();
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} else
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mHeadersToDisplay = stringList( standardHeaders, numStandardHeaders );
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if ( customHeader.hasKey( "headers to hide" ) ) {
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mHeadersToHide = customHeader.readListEntry( "headers to hide" );
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for ( TQStringList::iterator it = mHeadersToHide.begin() ; it != mHeadersToHide.end() ; ++ it )
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*it = (*it).lower();
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}
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mDefaultPolicy = customHeader.readEntry( "default policy", "hide" ) == "display" ? Display : Hide ;
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}
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//
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// HeaderStrategy abstract base:
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//
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HeaderStrategy::HeaderStrategy() {
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}
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HeaderStrategy::~HeaderStrategy() {
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}
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TQStringList HeaderStrategy::headersToDisplay() const {
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return TQStringList();
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}
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TQStringList HeaderStrategy::headersToHide() const {
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return TQStringList();
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}
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bool HeaderStrategy::showHeader( const TQString & header ) const {
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if ( headersToDisplay().contains( header.lower() ) ) return true;
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if ( headersToHide().contains( header.lower() ) ) return false;
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return defaultPolicy() == Display;
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}
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const HeaderStrategy * HeaderStrategy::create( Type type ) {
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switch ( type ) {
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case All: return all();
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case Rich: return rich();
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case Standard: return standard();
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case Brief: return brief();
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case Custom: return custom();
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}
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kdFatal( 5006 ) << "HeaderStrategy::create(): Unknown header strategy ( type == "
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<< (int)type << " ) requested!" << endl;
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return 0; // make compiler happy
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}
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const HeaderStrategy * HeaderStrategy::create( const TQString & type ) {
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TQString lowerType = type.lower();
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if ( lowerType == "all" ) return all();
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if ( lowerType == "rich" ) return HeaderStrategy::rich();
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//if ( lowerType == "standard" ) return standard(); // not needed, see below
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if ( lowerType == "brief" ) return brief();
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if ( lowerType == "custom" ) return custom();
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// don't kdFatal here, b/c the strings are user-provided
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// (KConfig), so fail gracefully to the default:
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return standard();
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}
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static const HeaderStrategy * allStrategy = 0;
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static const HeaderStrategy * richStrategy = 0;
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static const HeaderStrategy * standardStrategy = 0;
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static const HeaderStrategy * briefStrategy = 0;
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static const HeaderStrategy * customStrategy = 0;
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const HeaderStrategy * HeaderStrategy::all() {
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if ( !allStrategy )
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allStrategy = new AllHeaderStrategy();
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return allStrategy;
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}
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const HeaderStrategy * HeaderStrategy::rich() {
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if ( !richStrategy )
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richStrategy = new RichHeaderStrategy();
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return richStrategy;
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}
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const HeaderStrategy * HeaderStrategy::standard() {
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if ( !standardStrategy )
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standardStrategy = new StandardHeaderStrategy();
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return standardStrategy;
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}
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const HeaderStrategy * HeaderStrategy::brief() {
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if ( !briefStrategy )
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briefStrategy = new BriefHeaderStrategy();
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return briefStrategy;
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}
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const HeaderStrategy * HeaderStrategy::custom() {
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if ( !customStrategy )
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customStrategy = new CustomHeaderStrategy();
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return customStrategy;
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}
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} // namespace KMail
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