Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 858 insertions, 0 deletions

diff --git a/libkcal/calendar.cpp b/libkcal/calendar.cpp
new file mode 100644
index 000000000..4c9e568a3
--- /dev/null
+++ b/libkcal/calendar.cpp
@@ -0,0 +1,858 @@
+/*
+    This file is part of libkcal.
+
+    Copyright (c) 1998 Preston Brown <pbrown@kde.org>
+    Copyright (c) 2000-2004 Cornelius Schumacher <schumacher@kde.org>
+    Copyright (C) 2003-2004 Reinhold Kainhofer <reinhold@kainhofer.com>
+
+    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.
+*/
+/**
+   @file calendar.cpp
+   Provides the main "calendar" object class.
+
+   @author Preston Brown
+   @author Cornelius Schumacher
+   @author Reinhold Kainhofer
+*/
+#include <stdlib.h>
+
+#include <kdebug.h>
+#include <klocale.h>
+
+#include "exceptions.h"
+#include "calfilter.h"
+
+#include "calendar.h"
+
+using namespace KCal;
+
+Calendar::Calendar( const QString &timeZoneId )
+{
+  mTimeZoneId = timeZoneId;
+  mLocalTime = false;
+
+  init();
+}
+
+void Calendar::init()
+{
+  mNewObserver = false;
+  mObserversEnabled = true;
+
+  mModified = false;
+
+  // Setup default filter, which does nothing
+  mDefaultFilter = new CalFilter;
+  mFilter = mDefaultFilter;
+  mFilter->setEnabled( false );
+
+  // user information...
+  setOwner( Person( i18n( "Unknown Name" ), i18n( "unknown@nowhere" ) ) );
+}
+
+Calendar::~Calendar()
+{
+  delete mDefaultFilter;
+}
+
+const Person &Calendar::getOwner() const
+{
+  return mOwner;
+}
+
+void Calendar::setOwner( const Person &owner )
+{
+  mOwner = owner;
+
+  setModified( true );
+}
+
+void Calendar::setTimeZoneId( const QString &timeZoneId )
+{
+  mTimeZoneId = timeZoneId;
+  mLocalTime = false;
+
+  setModified( true );
+  doSetTimeZoneId( timeZoneId );
+}
+
+QString Calendar::timeZoneId() const
+{
+  return mTimeZoneId;
+}
+
+void Calendar::setLocalTime()
+{
+  mLocalTime = true;
+  mTimeZoneId = "";
+
+  setModified( true );
+}
+
+bool Calendar::isLocalTime() const
+{
+  return mLocalTime;
+}
+
+void Calendar::setFilter( CalFilter *filter )
+{
+  if ( filter ) {
+    mFilter = filter;
+  } else {
+    mFilter = mDefaultFilter;
+  }
+}
+
+CalFilter *Calendar::filter()
+{
+  return mFilter;
+}
+
+QStringList Calendar::categories()
+{
+  Incidence::List rawInc( rawIncidences() );
+  QStringList cats, thisCats;
+  // @TODO: For now just iterate over all incidences. In the future,
+  // the list of categories should be built when reading the file.
+  for ( Incidence::List::ConstIterator i = rawInc.constBegin();
+        i != rawInc.constEnd(); ++i ) {
+    thisCats = (*i)->categories();
+    for ( QStringList::ConstIterator si = thisCats.constBegin();
+          si != thisCats.constEnd(); ++si ) {
+      if ( cats.find( *si ) == cats.end() ) {
+        cats.append( *si );
+      }
+    }
+  }
+  return cats;
+}
+
+Incidence::List Calendar::incidences( const QDate &date )
+{
+  return mergeIncidenceList( events( date ), todos( date ), journals( date ) );
+}
+
+Incidence::List Calendar::incidences()
+{
+  return mergeIncidenceList( events(), todos(), journals() );
+}
+
+Incidence::List Calendar::rawIncidences()
+{
+  return mergeIncidenceList( rawEvents(), rawTodos(), rawJournals() );
+}
+
+Event::List Calendar::sortEvents( Event::List *eventList,
+                                  EventSortField sortField,
+                                  SortDirection sortDirection )
+{
+  Event::List eventListSorted;
+  Event::List tempList, t;
+  Event::List alphaList;
+  Event::List::Iterator sortIt;
+  Event::List::Iterator eit;
+
+  // Notice we alphabetically presort Summaries first.
+  // We do this so comparison "ties" stay in a nice order.
+
+  switch( sortField ) {
+  case EventSortUnsorted:
+    eventListSorted = *eventList;
+    break;
+
+  case EventSortStartDate:
+    alphaList = sortEvents( eventList, EventSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      sortIt = eventListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != eventListSorted.end() &&
+                (*eit)->dtStart() >= (*sortIt)->dtStart() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != eventListSorted.end() &&
+                (*eit)->dtStart() < (*sortIt)->dtStart() ) {
+          ++sortIt;
+        }
+      }
+      eventListSorted.insert( sortIt, *eit );
+    }
+    break;
+
+  case EventSortEndDate:
+    alphaList = sortEvents( eventList, EventSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      if ( (*eit)->hasEndDate() ) {
+        sortIt = eventListSorted.begin();
+        if ( sortDirection == SortDirectionAscending ) {
+          while ( sortIt != eventListSorted.end() &&
+                  (*eit)->dtEnd() >= (*sortIt)->dtEnd() ) {
+            ++sortIt;
+          }
+        } else {
+          while ( sortIt != eventListSorted.end() &&
+                  (*eit)->dtEnd() < (*sortIt)->dtEnd() ) {
+            ++sortIt;
+          }
+        }
+      } else {
+        // Keep a list of the Events without End DateTimes
+        tempList.append( *eit );
+      }
+      eventListSorted.insert( sortIt, *eit );
+    }
+    if ( sortDirection == SortDirectionAscending ) {
+      // Append the list of Events without End DateTimes
+      eventListSorted += tempList;
+    } else {
+      // Prepend the list of Events without End DateTimes
+      tempList += eventListSorted;
+      eventListSorted = tempList;
+    }
+    break;
+
+  case EventSortSummary:
+    for ( eit = eventList->begin(); eit != eventList->end(); ++eit ) {
+      sortIt = eventListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != eventListSorted.end() &&
+                (*eit)->summary() >= (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != eventListSorted.end() &&
+                (*eit)->summary() < (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      }
+      eventListSorted.insert( sortIt, *eit );
+    }
+    break;
+  }
+
+  return eventListSorted;
+
+}
+
+Event::List Calendar::events( const QDate &date,
+                              EventSortField sortField,
+                              SortDirection sortDirection )
+{
+  Event::List el = rawEventsForDate( date, sortField, sortDirection );
+  mFilter->apply( &el );
+  return el;
+}
+
+Event::List Calendar::events( const QDateTime &qdt )
+{
+  Event::List el = rawEventsForDate( qdt );
+  mFilter->apply( &el );
+  return el;
+}
+
+Event::List Calendar::events( const QDate &start, const QDate &end,
+                              bool inclusive)
+{
+  Event::List el = rawEvents( start, end, inclusive );
+  mFilter->apply( &el );
+  return el;
+}
+
+Event::List Calendar::events( EventSortField sortField,
+                              SortDirection sortDirection )
+{
+  Event::List el = rawEvents( sortField, sortDirection );
+  mFilter->apply( &el );
+  return el;
+}
+
+bool Calendar::addIncidence( Incidence *incidence )
+{
+  Incidence::AddVisitor<Calendar> v( this );
+
+  return incidence->accept(v);
+}
+
+bool Calendar::deleteIncidence( Incidence *incidence )
+{
+  if ( beginChange( incidence ) ) {
+    Incidence::DeleteVisitor<Calendar> v( this );
+    bool result = incidence->accept( v );
+    endChange( incidence );
+    return result;
+  } else
+    return false;
+}
+
+/** Dissociate a single occurrence or all future occurrences from a recurring sequence.
+    The new incidence is returned, but not automatically inserted into the calendar,
+    which is left to the calling application */
+Incidence *Calendar::dissociateOccurrence( Incidence *incidence, QDate date,
+                                           bool single )
+{
+  if ( !incidence || !incidence->doesRecur() )
+    return 0;
+
+  Incidence *newInc = incidence->clone();
+  newInc->recreate();
+  newInc->setRelatedTo( incidence );
+  Recurrence *recur = newInc->recurrence();
+  if ( single ) {
+    recur->clear();
+  } else {
+    // Adjust the recurrence for the future incidences. In particular
+    // adjust the "end after n occurrences" rules! "No end date" and "end by ..."
+    // don't need to be modified.
+    int duration = recur->duration();
+    if ( duration > 0 ) {
+      int doneduration = recur->durationTo( date.addDays(-1) );
+      if ( doneduration >= duration ) {
+        kdDebug(5850) << "The dissociated event already occurred more often "
+                      << "than it was supposed to ever occur. ERROR!" << endl;
+        recur->clear();
+      } else {
+        recur->setDuration( duration - doneduration );
+      }
+    }
+  }
+  // Adjust the date of the incidence
+  if ( incidence->type() == "Event" ) {
+    Event *ev = static_cast<Event *>( newInc );
+    QDateTime start( ev->dtStart() );
+    int daysTo = start.date().daysTo( date );
+    ev->setDtStart( start.addDays( daysTo ) );
+    ev->setDtEnd( ev->dtEnd().addDays( daysTo ) );
+  } else if ( incidence->type() == "Todo" ) {
+    Todo *td = static_cast<Todo *>( newInc );
+    bool haveOffset = false;
+    int daysTo = 0;
+    if ( td->hasDueDate() ) {
+      QDateTime due( td->dtDue() );
+      daysTo = due.date().daysTo( date );
+      td->setDtDue( due.addDays( daysTo ), true );
+      haveOffset = true;
+    }
+    if ( td->hasStartDate() ) {
+      QDateTime start( td->dtStart() );
+      if ( !haveOffset )
+        daysTo = start.date().daysTo( date );
+      td->setDtStart( start.addDays( daysTo ) );
+      haveOffset = true;
+    }
+  }
+  recur = incidence->recurrence();
+  if ( recur ) {
+    if ( single ) {
+      recur->addExDate( date );
+    } else {
+      // Make sure the recurrence of the past events ends
+      // at the corresponding day
+      recur->setEndDate( date.addDays(-1) );
+    }
+  }
+  return newInc;
+}
+
+Incidence *Calendar::incidence( const QString &uid )
+{
+  Incidence *i = event( uid );
+  if ( i )
+    return i;
+  i = todo( uid );
+  if ( i )
+    return i;
+  i = journal( uid );
+  return i;
+}
+
+Incidence::List Calendar::incidencesFromSchedulingID( const QString &UID )
+{
+  Incidence::List result;
+  Incidence::List incidences = rawIncidences();
+  Incidence::List::iterator it = incidences.begin();
+  for ( ; it != incidences.end(); ++it )
+    if ( (*it)->schedulingID() == UID )
+      result.append( *it );
+  return result;
+}
+
+Incidence *Calendar::incidenceFromSchedulingID( const QString &UID )
+{
+  Incidence::List incidences = rawIncidences();
+  Incidence::List::iterator it = incidences.begin();
+  for ( ; it != incidences.end(); ++it )
+    if ( (*it)->schedulingID() == UID )
+      // Touchdown, and the crowd goes wild
+      return *it;
+  // Not found
+  return 0;
+}
+
+Todo::List Calendar::sortTodos( Todo::List *todoList,
+                                TodoSortField sortField,
+                                SortDirection sortDirection )
+{
+  Todo::List todoListSorted;
+  Todo::List tempList, t;
+  Todo::List alphaList;
+  Todo::List::Iterator sortIt;
+  Todo::List::Iterator eit;
+
+  // Notice we alphabetically presort Summaries first.
+  // We do this so comparison "ties" stay in a nice order.
+
+  // Note that Todos may not have Start DateTimes nor due DateTimes.
+
+  switch( sortField ) {
+  case TodoSortUnsorted:
+    todoListSorted = *todoList;
+    break;
+
+  case TodoSortStartDate:
+    alphaList = sortTodos( todoList, TodoSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      if ( (*eit)->hasStartDate() ) {
+        sortIt = todoListSorted.begin();
+        if ( sortDirection == SortDirectionAscending ) {
+          while ( sortIt != todoListSorted.end() &&
+                  (*eit)->dtStart() >= (*sortIt)->dtStart() ) {
+            ++sortIt;
+          }
+        } else {
+          while ( sortIt != todoListSorted.end() &&
+                  (*eit)->dtStart() < (*sortIt)->dtStart() ) {
+            ++sortIt;
+          }
+        }
+        todoListSorted.insert( sortIt, *eit );
+      } else {
+        // Keep a list of the Todos without Start DateTimes
+        tempList.append( *eit );
+      }
+    }
+    if ( sortDirection == SortDirectionAscending ) {
+      // Append the list of Todos without Start DateTimes
+      todoListSorted += tempList;
+    } else {
+      // Prepend the list of Todos without Start DateTimes
+      tempList += todoListSorted;
+      todoListSorted = tempList;
+    }
+    break;
+
+  case TodoSortDueDate:
+    alphaList = sortTodos( todoList, TodoSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      if ( (*eit)->hasDueDate() ) {
+        sortIt = todoListSorted.begin();
+        if ( sortDirection == SortDirectionAscending ) {
+          while ( sortIt != todoListSorted.end() &&
+                  (*eit)->dtDue() >= (*sortIt)->dtDue() ) {
+            ++sortIt;
+          }
+        } else {
+          while ( sortIt != todoListSorted.end() &&
+                  (*eit)->dtDue() < (*sortIt)->dtDue() ) {
+            ++sortIt;
+          }
+        }
+        todoListSorted.insert( sortIt, *eit );
+      } else {
+        // Keep a list of the Todos without Due DateTimes
+        tempList.append( *eit );
+      }
+    }
+    if ( sortDirection == SortDirectionAscending ) {
+      // Append the list of Todos without Due DateTimes
+      todoListSorted += tempList;
+    } else {
+      // Prepend the list of Todos without Due DateTimes
+      tempList += todoListSorted;
+      todoListSorted = tempList;
+    }
+    break;
+
+  case TodoSortPriority:
+    alphaList = sortTodos( todoList, TodoSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      sortIt = todoListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->priority() >= (*sortIt)->priority() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->priority() < (*sortIt)->priority() ) {
+          ++sortIt;
+        }
+      }
+      todoListSorted.insert( sortIt, *eit );
+    }
+    break;
+
+  case TodoSortPercentComplete:
+    alphaList = sortTodos( todoList, TodoSortSummary, sortDirection );
+    for ( eit = alphaList.begin(); eit != alphaList.end(); ++eit ) {
+      sortIt = todoListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->percentComplete() >= (*sortIt)->percentComplete() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->percentComplete() < (*sortIt)->percentComplete() ) {
+          ++sortIt;
+        }
+      }
+      todoListSorted.insert( sortIt, *eit );
+    }
+    break;
+
+  case TodoSortSummary:
+    for ( eit = todoList->begin(); eit != todoList->end(); ++eit ) {
+      sortIt = todoListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->summary() >= (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != todoListSorted.end() &&
+                (*eit)->summary() < (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      }
+      todoListSorted.insert( sortIt, *eit );
+    }
+    break;
+  }
+
+  return todoListSorted;
+}
+
+Todo::List Calendar::todos( TodoSortField sortField,
+                            SortDirection sortDirection )
+{
+  Todo::List tl = rawTodos( sortField, sortDirection );
+  mFilter->apply( &tl );
+  return tl;
+}
+
+Todo::List Calendar::todos( const QDate &date )
+{
+  Todo::List el = rawTodosForDate( date );
+  mFilter->apply( &el );
+  return el;
+}
+
+Journal::List Calendar::sortJournals( Journal::List *journalList,
+                                      JournalSortField sortField,
+                                      SortDirection sortDirection )
+{
+  Journal::List journalListSorted;
+  Journal::List::Iterator sortIt;
+  Journal::List::Iterator eit;
+
+  switch( sortField ) {
+  case JournalSortUnsorted:
+    journalListSorted = *journalList;
+    break;
+
+  case JournalSortDate:
+    for ( eit = journalList->begin(); eit != journalList->end(); ++eit ) {
+      sortIt = journalListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != journalListSorted.end() &&
+                (*eit)->dtStart() >= (*sortIt)->dtStart() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != journalListSorted.end() &&
+                (*eit)->dtStart() < (*sortIt)->dtStart() ) {
+          ++sortIt;
+        }
+      }
+      journalListSorted.insert( sortIt, *eit );
+    }
+    break;
+
+  case JournalSortSummary:
+    for ( eit = journalList->begin(); eit != journalList->end(); ++eit ) {
+      sortIt = journalListSorted.begin();
+      if ( sortDirection == SortDirectionAscending ) {
+        while ( sortIt != journalListSorted.end() &&
+                (*eit)->summary() >= (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      } else {
+        while ( sortIt != journalListSorted.end() &&
+                (*eit)->summary() < (*sortIt)->summary() ) {
+          ++sortIt;
+        }
+      }
+      journalListSorted.insert( sortIt, *eit );
+    }
+    break;
+  }
+
+  return journalListSorted;
+}
+
+Journal::List Calendar::journals( JournalSortField sortField,
+                                  SortDirection sortDirection )
+{
+  Journal::List jl = rawJournals( sortField, sortDirection );
+  mFilter->apply( &jl );
+  return jl;
+}
+
+Journal::List Calendar::journals( const QDate &date )
+{
+  Journal::List el = rawJournalsForDate( date );
+  mFilter->apply( &el );
+  return el;
+}
+
+// When this is called, the todo have already been added to the calendar.
+// This method is only about linking related todos
+void Calendar::setupRelations( Incidence *forincidence )
+{
+  if ( !forincidence ) return;
+// kdDebug(5850) << "Calendar::setupRelations for incidence " << forincidence << " with UID " << forincidence->uid() << ", summary: " << forincidence->summary() << endl;
+  QString uid = forincidence->uid();
+
+  // First, go over the list of orphans and see if this is their parent
+  while ( Incidence* i = mOrphans[ uid ] ) {
+    mOrphans.remove( uid );
+    i->setRelatedTo( forincidence );
+    forincidence->addRelation( i );
+    mOrphanUids.remove( i->uid() );
+  }
+
+  // Now see about this incidences parent
+  if ( !forincidence->relatedTo() && !forincidence->relatedToUid().isEmpty() ) {
+    // This incidence has a uid it is related to but is not registered to it yet
+    // Try to find it
+    Incidence* parent = incidence( forincidence->relatedToUid() );
+    if ( parent ) {
+      // Found it
+      forincidence->setRelatedTo( parent );
+      parent->addRelation( forincidence );
+    } else {
+      // Not found, put this in the mOrphans list
+      // Note that the mOrphans dict might have several entries with the same key! That are
+      // multiple children that wait for the parent incidence to be inserted.
+      mOrphans.insert( forincidence->relatedToUid(), forincidence );
+      mOrphanUids.insert( forincidence->uid(), forincidence );
+    }
+  }
+}
+
+// If a task with subtasks is deleted, move it's subtasks to the orphans list
+void Calendar::removeRelations( Incidence *incidence )
+{
+  if( !incidence ) {
+    kdDebug(5800) << "Warning: Calendar::removeRelations( 0 )!\n";
+    return;
+  }
+
+// kdDebug(5850) << "Calendar::removeRelations for incidence " << forincidence << " with UID " << forincidence->uid() << ", summary: " << forincidence->summary() << endl;
+  QString uid = incidence->uid();
+
+  Incidence::List relations = incidence->relations();
+  Incidence::List::ConstIterator it;
+  for ( it = relations.begin(); it != relations.end(); ++it ) {
+    Incidence *i = *it;
+    if ( !mOrphanUids.find( i->uid() ) ) {
+      mOrphans.insert( uid, i );
+      mOrphanUids.insert( i->uid(), i );
+      i->setRelatedTo( 0 );
+      i->setRelatedToUid( uid );
+    }
+  }
+
+  // If this incidence is related to something else, tell that about it
+  if ( incidence->relatedTo() )
+    incidence->relatedTo()->removeRelation( incidence );
+
+  // Remove this one from the orphans list
+  if ( mOrphanUids.remove( uid ) ) {
+    // This incidence is located in the orphans list - it should be removed
+    // Since the mOrphans dict might contain the same key (with different
+    // child incidence pointers!) multiple times, take care that we remove
+    // the correct one. So we need to remove all items with the given
+    // parent UID, and readd those that are not for this item. Also, there
+    // might be other entries with differnet UID that point to this
+    // incidence (this might happen when the relatedTo of the item is
+    // changed before its parent is inserted. This might happen with
+    // groupware servers....). Remove them, too
+    QStringList relatedToUids;
+    // First get the list of all keys in the mOrphans list that point to the removed item
+    relatedToUids << incidence->relatedToUid();
+    for ( QDictIterator<Incidence> it( mOrphans ); it.current(); ++it ) {
+      if ( it.current()->uid() == uid ) {
+        relatedToUids << it.currentKey();
+      }
+    }
+
+    // now go through all uids that have one entry that point to the incidence
+    for ( QStringList::Iterator uidit = relatedToUids.begin();
+          uidit != relatedToUids.end(); ++uidit ) {
+      Incidence::List tempList;
+      // Remove all to get access to the remaining entries
+      while( Incidence* i = mOrphans[ *uidit ] ) {
+        mOrphans.remove( *uidit );
+        if ( i != incidence ) tempList.append( i );
+      }
+      // Readd those that point to a different orphan incidence
+      for ( Incidence::List::Iterator incit = tempList.begin();
+            incit != tempList.end(); ++incit ) {
+        mOrphans.insert( *uidit, *incit );
+      }
+    }
+  }
+}
+
+void Calendar::registerObserver( Observer *observer )
+{
+  if( !mObservers.contains( observer ) )
+    mObservers.append( observer );
+  mNewObserver = true;
+}
+
+void Calendar::unregisterObserver( Observer *observer )
+{
+  mObservers.remove( observer );
+}
+
+void Calendar::setModified( bool modified )
+{
+  if ( modified != mModified || mNewObserver ) {
+    mNewObserver = false;
+    Observer *observer;
+    for ( observer = mObservers.first(); observer;
+          observer = mObservers.next() ) {
+      observer->calendarModified( modified, this );
+    }
+    mModified = modified;
+  }
+}
+
+void Calendar::incidenceUpdated( IncidenceBase *incidence )
+{
+  incidence->setSyncStatus( Event::SYNCMOD );
+  incidence->setLastModified( QDateTime::currentDateTime() );
+  // we should probably update the revision number here,
+  // or internally in the Event itself when certain things change.
+  // need to verify with ical documentation.
+
+  // The static_cast is ok as the CalendarLocal only observes Incidence objects
+  notifyIncidenceChanged( static_cast<Incidence *>( incidence ) );
+
+  setModified( true );
+}
+
+void Calendar::notifyIncidenceAdded( Incidence *i )
+{
+  if ( !mObserversEnabled )
+    return;
+
+  Observer *observer;
+  for ( observer = mObservers.first(); observer;
+        observer = mObservers.next() ) {
+    observer->calendarIncidenceAdded( i );
+  }
+}
+
+void Calendar::notifyIncidenceChanged( Incidence *i )
+{
+  if ( !mObserversEnabled )
+    return;
+
+  Observer *observer;
+  for ( observer = mObservers.first(); observer;
+        observer = mObservers.next() ) {
+    observer->calendarIncidenceChanged( i );
+  }
+}
+
+void Calendar::notifyIncidenceDeleted( Incidence *i )
+{
+  if ( !mObserversEnabled )
+    return;
+
+  Observer *observer;
+  for ( observer = mObservers.first(); observer;
+        observer = mObservers.next() ) {
+    observer->calendarIncidenceDeleted( i );
+  }
+}
+
+void Calendar::customPropertyUpdated()
+{
+  setModified( true );
+}
+
+void Calendar::setProductId( const QString &productId )
+{
+  mProductId = productId;
+}
+
+QString Calendar::productId()
+{
+  return mProductId;
+}
+
+Incidence::List Calendar::mergeIncidenceList( const Event::List &events,
+                                              const Todo::List &todos,
+                                              const Journal::List &journals )
+{
+  Incidence::List incidences;
+
+  Event::List::ConstIterator it1;
+  for ( it1 = events.begin(); it1 != events.end(); ++it1 )
+    incidences.append( *it1 );
+
+  Todo::List::ConstIterator it2;
+  for ( it2 = todos.begin(); it2 != todos.end(); ++it2 )
+    incidences.append( *it2 );
+
+  Journal::List::ConstIterator it3;
+  for ( it3 = journals.begin(); it3 != journals.end(); ++it3 )
+    incidences.append( *it3 );
+
+  return incidences;
+}
+
+bool Calendar::beginChange( Incidence * )
+{
+  return true;
+}
+
+bool Calendar::endChange( Incidence * )
+{
+  return true;
+}
+
+void Calendar::setObserversEnabled( bool enabled )
+{
+  mObserversEnabled = enabled;
+}
+
+#include "calendar.moc"