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 /* This file is part of the KDE project
  *
  * Copyright (C) 2011 Pierre Ducroquet <pinaraf@pinaraf.info>
  *
  * 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 "KoShadowStyle.h"
 
 #include <KoUnit.h>
 
 
 // KoShadowStyle private class
 class KoShadowStylePrivate: public QSharedData
 {
 public:
     KoShadowStylePrivate();
     ~KoShadowStylePrivate();
 
     QVector<KoShadowStyle::ShadowData> shadows;
 };
 
 KoShadowStylePrivate::KoShadowStylePrivate()
 {
 }
 
 KoShadowStylePrivate::~KoShadowStylePrivate()
 {
 }
 
 // KoShadowStyle::ShadowData structure
 KoShadowStyle::ShadowData::ShadowData()
     : color(), offset(0, 0), radius(0.0)
 {
 }
 
 bool KoShadowStyle::ShadowData::operator==(const KoShadowStyle::ShadowData &other) const
 {
     return (color == other.color) && (offset == other.offset) && (radius == other.radius);
 }
 
 // KoShadowStyle class
 KoShadowStyle::KoShadowStyle()
     : d(new KoShadowStylePrivate)
 {
 }
 
 KoShadowStyle::KoShadowStyle(const KoShadowStyle &other)
     : d(other.d)
 {
 }
 
 KoShadowStyle::~KoShadowStyle()
 {
 }
 
 bool KoShadowStyle::operator==(const KoShadowStyle &other) const
 {
     if (d.data() == other.d.data())
         return true;
 
     if (shadowCount() != other.shadowCount())
         return false;
 
     foreach (const ShadowData &data, d->shadows)
     {
         if (!other.d->shadows.contains(data))
             return false;
     }
     return true;
 }
 
 bool KoShadowStyle::operator!=(const KoShadowStyle &other) const
 {
     return !operator==(other);
 }
 
 // load value string as specified by CSS2 §7.16.5 "text-shadow"
 bool KoShadowStyle::loadOdf (const QString &data)
 {
     if (data == QLatin1String("none"))
         return true;
 
     const QStringList sub_shadows = data.split(QLatin1Char(','));
     foreach (const QString &shadow, sub_shadows) {
         QStringList words = shadow.split(QLatin1Char(' '), QString::SkipEmptyParts);
         if (words.isEmpty())
             return false;
 
         KoShadowStyle::ShadowData currentData;
 
         // look for color at begin
         QColor shadowColor(words.first());
         if (shadowColor.isValid()) {
             currentData.color = shadowColor;
             words.removeFirst();
         } else if (words.length() > 2) {
             // look for color at end, if there could be one
             shadowColor = QColor(words.last());
             if (shadowColor.isValid()) {
                 currentData.color = shadowColor;
                 words.removeLast();
             }
         }
         // We keep an invalid color.if none was found
 
         // "Each shadow effect must specify a shadow offset and may optionally
         // specify a blur radius and a shadow color.", from CSS2 §7.16.5 "text-shadow"
         // But for some reason also no offset has been accepted before. TODO: which?
         if (! words.isEmpty()) {
             if ((words.length() < 2) || (words.length() > 3))
                 return false;
 
             // Parse offset
             currentData.offset.setX(KoUnit::parseValue(words.at(0), 0.0));
             currentData.offset.setY(KoUnit::parseValue(words.at(1), 0.0));
             // Parse blur radius if present
             if (words.length() == 3)
                 currentData.radius = KoUnit::parseValue(words.at(2), 0.0);
         }
         d->shadows << currentData;
     }
     return true;
 }
 
 int KoShadowStyle::shadowCount() const
 {
     return d->shadows.size();
 }
 
 QString KoShadowStyle::saveOdf() const
 {
     if (d->shadows.isEmpty())
         return QLatin1String("none");
 
     QStringList parts;
     const QString pt = QLatin1String("%1pt");
     foreach (const ShadowData &data, d->shadows) {
         QStringList elements;
         if (data.color.isValid()) {
             elements << data.color.name();
         }
         elements << pt.arg(data.offset.x()) << pt.arg(data.offset.y());
         if (data.radius != 0)
             elements << pt.arg(data.radius);
 
         parts << elements.join(QLatin1String(" "));
     }
     return parts.join(QLatin1String(","));
 }