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/** -*- c++ -*-
 * completionordereditor.cpp
 *
 *  Copyright (c) 2004 David Faure <faure@kde.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License
 *
 *  This program 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 TQt library by Trolltech AS, Norway (or with modified versions
 *  of TQt that use the same license as TQt), 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
 *  TQt.  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.
 */
#include <config.h> // FOR TDEPIM_NEW_DISTRLISTS

#include "completionordereditor.h"
#include "ldapclient.h"
#include "resourceabc.h"

#include <kabc/stdaddressbook.h>
#include <kabc/resource.h>

#include <kdebug.h>
#include <klocale.h>
#include <kiconloader.h>
#include <klistview.h>
#include <kpushbutton.h>

#include <tqhbox.h>
#include <tqvbox.h>
#include <tqheader.h>
#include <tqtoolbutton.h>
#include <kapplication.h>
#include <dcopclient.h>

/*

Several items are used in addresseelineedit's completion object:
  LDAP servers, KABC resources (imap and non-imap), Recent addresses (in kmail only).

The default completion weights are as follow:
  Recent addresses (kmail) : 10  (see kmail/kmlineeditspell.cpp)
  LDAP: 50, 49, 48 etc.          (see ldapclient.cpp)
  KABC non-imap resources: 60    (see addresseelineedit.cpp and SimpleCompletionItem here)
  Distribution lists: 60         (see addresseelineedit.cpp and SimpleCompletionItem here)
  KABC imap resources: 80        (see kresources/imap/kabc/resourceimap.cpp)

This dialog allows to change those weights, by showing one item per:
 - LDAP server
 - KABC non-imap resource
 - KABC imap subresource
 plus one item for Distribution Lists.

 Maybe 'recent addresses' should be configurable too, but first it might
 be better to add support for them in korganizer too.

*/

using namespace KPIM;

namespace KPIM {

int CompletionItemList::compareItems( TQPtrCollection::Item s1, TQPtrCollection::Item s2 )
{
  int w1 = ( (CompletionItem*)s1 )->completionWeight();
  int w2 = ( (CompletionItem*)s2 )->completionWeight();
  // s1 < s2 if it has a higher completion value, i.e. w1 > w2.
  return w2 - w1;
}

class LDAPCompletionItem : public CompletionItem
{
public:
  LDAPCompletionItem( LdapClient* ldapClient ) : mLdapClient( ldapClient ) {}
  virtual TQString label() const { return i18n( "LDAP server %1" ).arg( mLdapClient->server().host() ); }
  virtual int completionWeight() const { return mLdapClient->completionWeight(); }
  virtual void save( CompletionOrderEditor* );
protected:
  virtual void setCompletionWeight( int weight ) { mWeight = weight; }
private:
  LdapClient* mLdapClient;
  int mWeight;
};

void LDAPCompletionItem::save( CompletionOrderEditor* )
{
  TDEConfig * config = LdapSearch::config();
  config->setGroup( "LDAP" );
  config->writeEntry( TQString( "SelectedCompletionWeight%1" ).arg( mLdapClient->clientNumber() ),
                      mWeight );
  config->sync();
}

// A simple item saved into kpimcompletionorder (no subresources, just name/identifier/weight)
class SimpleCompletionItem : public CompletionItem
{
public:
  SimpleCompletionItem( CompletionOrderEditor* editor, const TQString& label, const TQString& identifier, int weight )
    : mLabel( label ), mIdentifier( identifier ) {
      TDEConfigGroup group( editor->configFile(), "CompletionWeights" );
      mWeight = group.readNumEntry( mIdentifier, weight );
    }
  virtual TQString label() const { return mLabel; }
  virtual int completionWeight() const { return mWeight; }
  virtual void save( CompletionOrderEditor* );
protected:
  virtual void setCompletionWeight( int weight ) { mWeight = weight; }
private:
  TQString mLabel, mIdentifier;
  int mWeight;
};

void SimpleCompletionItem::save( CompletionOrderEditor* editor )
{
  // Maybe KABC::Resource could have a completionWeight setting (for readConfig/writeConfig)
  // But for tdelibs-3.2 compat purposes I can't do that.
  TDEConfigGroup group( editor->configFile(), "CompletionWeights" );
  group.writeEntry( mIdentifier, mWeight );
}

// An imap subresource for kabc
class KABCImapSubResCompletionItem : public CompletionItem
{
public:
  KABCImapSubResCompletionItem( ResourceABC* resource, const TQString& subResource )
    : mResource( resource ), mSubResource( subResource ), mWeight( completionWeight() ) {}
  virtual TQString label() const {
    return TQString( "%1 %2" ).arg( mResource->resourceName() ).arg( mResource->subresourceLabel( mSubResource ) );
  }
  virtual int completionWeight() const {
    return mResource->subresourceCompletionWeight( mSubResource );
  }
  virtual void setCompletionWeight( int weight ) {
    mWeight = weight;
  }
  virtual void save( CompletionOrderEditor* ) {
    mResource->setSubresourceCompletionWeight( mSubResource, mWeight );
  }
private:
  ResourceABC* mResource;
  TQString mSubResource;
  int mWeight;
};

/////////

class CompletionViewItem : public TQListViewItem
{
public:
  CompletionViewItem( TQListView* lv, CompletionItem* item )
    : TQListViewItem( lv, lv->lastItem(), item->label() ), mItem( item ) {}
  CompletionItem* item() const { return mItem; }
  void setItem( CompletionItem* i ) { mItem = i; setText( 0, mItem->label() ); }

private:
  CompletionItem* mItem;
};

CompletionOrderEditor::CompletionOrderEditor( KPIM::LdapSearch* ldapSearch,
                                              TQWidget* parent, const char* name )
  : KDialogBase( parent, name, true, i18n("Edit Completion Order"), Ok|Cancel, Ok, true ),
    mConfig( "kpimcompletionorder" ), mDirty( false )
{
  mItems.setAutoDelete( true );
  // The first step is to gather all the data, creating CompletionItem objects
  TQValueList< LdapClient* > ldapClients = ldapSearch->clients();
  for( TQValueList<LdapClient*>::const_iterator it = ldapClients.begin(); it != ldapClients.end(); ++it ) {
    //kdDebug(5300) << "LDAP: host " << (*it)->host() << " weight " << (*it)->completionWeight() << endl;
    mItems.append( new LDAPCompletionItem( *it ) );
  }
  KABC::AddressBook *addressBook = KABC::StdAddressBook::self( true );
  TQPtrList<KABC::Resource> resources = addressBook->resources();
  for( TQPtrListIterator<KABC::Resource> resit( resources ); *resit; ++resit ) {
    //kdDebug(5300) << "KABC Resource: " << (*resit)->className() << endl;
    ResourceABC* res = dynamic_cast<ResourceABC *>( *resit );
    if ( res ) { // IMAP KABC resource
      const TQStringList subresources = res->subresources();
      for( TQStringList::const_iterator it = subresources.begin(); it != subresources.end(); ++it ) {
        mItems.append( new KABCImapSubResCompletionItem( res, *it ) );
      }
    } else { // non-IMAP KABC resource
      mItems.append( new SimpleCompletionItem( this, (*resit)->resourceName(),
                                               (*resit)->identifier(), 60 ) );
    }
  }

#ifndef TDEPIM_NEW_DISTRLISTS // new distr lists are normal contact, so no separate item if using them
  // Add an item for distribution lists
  mItems.append( new SimpleCompletionItem( this, i18n( "Distribution Lists" ), "DistributionLists" ), 60 );
#endif

  mItems.append( new SimpleCompletionItem( this, i18n( "Recent Addresses" ), "Recent Addresses", 10 ) );

  // Now sort the items, then create the GUI
  mItems.sort();

  TQHBox* page = makeHBoxMainWidget();
  mListView = new KListView( page );
  mListView->setSorting( -1 );
  mListView->addColumn( TQString() );
  mListView->header()->hide();

  for( TQPtrListIterator<CompletionItem> compit( mItems ); *compit; ++compit ) {
    new CompletionViewItem( mListView, *compit );
    kdDebug(5300) << "  " << (*compit)->label() << " " << (*compit)->completionWeight() << endl;
  }

  TQVBox* upDownBox = new TQVBox( page );
  mUpButton = new KPushButton( upDownBox, "mUpButton" );
  mUpButton->setIconSet( BarIconSet( "up", KIcon::SizeSmall ) );
  mUpButton->setEnabled( false ); // b/c no item is selected yet
  mUpButton->setFocusPolicy( TQ_StrongFocus );

  mDownButton = new KPushButton( upDownBox, "mDownButton" );
  mDownButton->setIconSet( BarIconSet( "down", KIcon::SizeSmall ) );
  mDownButton->setEnabled( false ); // b/c no item is selected yet
  mDownButton->setFocusPolicy( TQ_StrongFocus );

  TQWidget* spacer = new TQWidget( upDownBox );
  upDownBox->setStretchFactor( spacer, 100 );

  connect( mListView, TQT_SIGNAL( selectionChanged( TQListViewItem* ) ),
           TQT_SLOT( slotSelectionChanged( TQListViewItem* ) ) );
  connect( mUpButton, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotMoveUp() ) );
  connect( mDownButton, TQT_SIGNAL( clicked() ), this, TQT_SLOT( slotMoveDown() ) );
}

CompletionOrderEditor::~CompletionOrderEditor()
{
}

void CompletionOrderEditor::slotSelectionChanged( TQListViewItem *item )
{
  mDownButton->setEnabled( item && item->itemBelow() );
  mUpButton->setEnabled( item && item->itemAbove() );
}

static void swapItems( CompletionViewItem *one, CompletionViewItem *other )
{
  CompletionItem* i = one->item();
  one->setItem( other->item() );
  other->setItem( i );
}

void CompletionOrderEditor::slotMoveUp()
{
  CompletionViewItem *item = static_cast<CompletionViewItem *>( mListView->selectedItem() );
  if ( !item ) return;
  CompletionViewItem *above = static_cast<CompletionViewItem *>( item->itemAbove() );
  if ( !above ) return;
  swapItems( item, above );
  mListView->setCurrentItem( above );
  mListView->setSelected( above, true );
  mDirty = true;
}

void CompletionOrderEditor::slotMoveDown()
{
  CompletionViewItem *item = static_cast<CompletionViewItem *>( mListView->selectedItem() );
  if ( !item ) return;
  CompletionViewItem *below = static_cast<CompletionViewItem *>( item->itemBelow() );
  if ( !below ) return;
  swapItems( item, below );
  mListView->setCurrentItem( below );
  mListView->setSelected( below, true );
  mDirty = true;
}

void CompletionOrderEditor::slotOk()
{
  if ( mDirty ) {
    int w = 100;
    for ( TQListViewItem* it = mListView->firstChild(); it; it = it->nextSibling() ) {
      CompletionViewItem *item = static_cast<CompletionViewItem *>( it );
      item->item()->setCompletionWeight( w );
      item->item()->save( this );
      kdDebug(5300) << "slotOk:   " << item->item()->label() << " " << w << endl;
      --w;
    }

    // Emit DCOP signal
    // The emitter is always set to KPIM::IMAPCompletionOrder, so that the connect works
    // This is why we can't use k_dcop_signals here, but need to use emitDCOPSignal
    kapp->dcopClient()->emitDCOPSignal( "KPIM::IMAPCompletionOrder", "orderChanged()", TQByteArray() );
  }
  KDialogBase::slotOk();
}

} // namespace KPIM

#include "completionordereditor.moc"