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