/*
  Copyright (c) 2012 Montel Laurent <montel@kde.org>
  based on code from kopete

  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.
*/

#include "emoticontexteditselector.h"

#include <KEmoticons>
#include <kemoticonstheme.h>

#include <QListWidget>
#include <QPixmap>
#include <QHBoxLayout>

// Use a static for this as calls to the KEmoticons constructor are expensive.
K_GLOBAL_STATIC( KEmoticons, sEmoticons )

using namespace KPIMTextEdit;

EmoticonTextEditItem::EmoticonTextEditItem( const QString &emoticonText,
                                            const QString &pixmapPath,
                                            QListWidget *parent )
  : QListWidgetItem( parent )
{
  mText = emoticonText;
  mPixmapPath = pixmapPath;
  QPixmap p( mPixmapPath );
  // Some of the custom icons are rather large
  // so lets limit them to a maximum size for this display panel
  //
  if ( p.width() > 32 || p.height() > 32 ) {
    p = p.scaled( QSize( 32, 32 ), Qt::KeepAspectRatio );
  }

  setIcon( p );
  setToolTip( mText );
}

QString EmoticonTextEditItem::text() const
{
  return mText;
}

QString EmoticonTextEditItem::pixmapPath() const
{
  return mPixmapPath;
}

class EmoticonTextEditSelector::EmoticonTextEditSelectorPrivate
{
  public:
    EmoticonTextEditSelectorPrivate()
    {
    }
    QListWidget *listEmoticon;
};

EmoticonTextEditSelector::EmoticonTextEditSelector( QWidget *parent )
  : QWidget( parent ), d( new EmoticonTextEditSelectorPrivate() )
{
  QHBoxLayout *lay = new QHBoxLayout( this );
  lay->setSpacing( 0 );
  lay->setContentsMargins( 0, 0, 0, 0 );
  d->listEmoticon = new QListWidget( this );
  lay->addWidget( d->listEmoticon );
  d->listEmoticon->setViewMode( QListView::IconMode );
  d->listEmoticon->setSelectionMode( QAbstractItemView::SingleSelection );
  d->listEmoticon->setMouseTracking( true );
  d->listEmoticon->setDragEnabled( false );
  connect( d->listEmoticon, SIGNAL(itemEntered(QListWidgetItem*)),
           this, SLOT(slotMouseOverItem(QListWidgetItem*)) );
  connect( d->listEmoticon, SIGNAL(itemClicked(QListWidgetItem*)),
           this, SLOT(slotEmoticonClicked(QListWidgetItem*)) );
}

EmoticonTextEditSelector::~EmoticonTextEditSelector()
{
  delete d;
}

void EmoticonTextEditSelector::slotCreateEmoticonList()
{
  d->listEmoticon->clear();
  static QString cachedEmoticonsThemeName;
  if ( cachedEmoticonsThemeName.isEmpty() ) {
    cachedEmoticonsThemeName = KEmoticons::currentThemeName();
  }
  const QHash<QString, QStringList> list =
    sEmoticons->theme( cachedEmoticonsThemeName ).emoticonsMap();

  //Keep in sync with linklocator.cpp
  QStringList exclude;
  exclude << QLatin1String("(c)") << QLatin1String("(C)") << QLatin1String("&gt;:-(") << QLatin1String("&gt;:(") << QLatin1String("(B)") << QLatin1String("(b)") << QLatin1String("(P)") << QLatin1String("(p)");
  exclude << QLatin1String("(O)") << QLatin1String("(o)") << QLatin1String("(D)") << QLatin1String("(d)") << QLatin1String("(E)") << QLatin1String("(e)") << QLatin1String("(K)") << QLatin1String("(k)");
  exclude << QLatin1String("(I)") << QLatin1String("(i)") << QLatin1String("(L)") << QLatin1String("(l)") << QLatin1String("(8)") << QLatin1String("(T)") << QLatin1String("(t)") << QLatin1String("(G)");
  exclude << QLatin1String("(g)") << QLatin1String("(F)") << QLatin1String("(f)") << QLatin1String("(H)");
  exclude << QLatin1String("8)") << QLatin1String("(N)") << QLatin1String("(n)") << QLatin1String("(Y)") << QLatin1String("(y)") << QLatin1String("(U)") << QLatin1String("(u)") << QLatin1String("(W)") << QLatin1String("(w)");

  QHash<QString, QStringList>::const_iterator end = list.constEnd();
  for ( QHash<QString, QStringList>::const_iterator it = list.constBegin(); it != end; ++it ) {
      if (!exclude.contains(it.value().first()))
          new EmoticonTextEditItem( it.value().first(), it.key(), d->listEmoticon );
  }

  d->listEmoticon->setIconSize( QSize( 32, 32 ) );
}

void EmoticonTextEditSelector::slotMouseOverItem( QListWidgetItem *item )
{
  item->setSelected( true );
  if ( !d->listEmoticon->hasFocus() ) {
    d->listEmoticon->setFocus();
  }
}

void EmoticonTextEditSelector::slotEmoticonClicked( QListWidgetItem *item )
{
  if ( !item ) {
    return;
  }
  EmoticonTextEditItem *itemEmoticon = static_cast<EmoticonTextEditItem*>( item );

  emit itemSelected ( itemEmoticon->text() );
  if ( isVisible() && parentWidget() &&
       parentWidget()->inherits( "QMenu" ) ) {
    parentWidget()->close();
  }
}