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 /* This file is part of the KDE project
  *
  * Copyright (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2007 David Faure <faure@kde.org>
  *
  * 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 "khtml_global.h"
 #include "khtml_part.h"
 #include "khtml_settings.h"
 #include "../khtml_version.h"
 
 #include "css/cssstyleselector.h"
 #include "css/css_mediaquery.h"
 #include "html/html_imageimpl.h"
 #include "rendering/render_style.h"
 #include "rendering/break_lines.h"
 #include "misc/htmlnames.h"
 #include "misc/loader.h"
 #include "misc/arena.h"
 #include "misc/paintbuffer.h"
 
 #include <QLinkedList>
 
 #include <kiconloader.h>
 #include <kaboutdata.h>
 #include <klocalizedstring.h>
 
 #include <assert.h>
 
 #include "khtml_debug.h"
 
 // SVG
 #include "svg/SVGNames.h"
 
 KHTMLGlobal *KHTMLGlobal::s_self = nullptr;
 unsigned long int KHTMLGlobal::s_refcnt = 0;
 KIconLoader *KHTMLGlobal::s_iconLoader = nullptr;
 KAboutData *KHTMLGlobal::s_about = nullptr;
 KHTMLSettings *KHTMLGlobal::s_settings = nullptr;
 
 static QLinkedList<KHTMLPart *> *s_parts = nullptr;
 static QLinkedList<DOM::DocumentImpl *> *s_docs = nullptr;
 
 KHTMLGlobal::KHTMLGlobal()
 {
     assert(!s_self);
     s_self = this;
     ref();
 
     khtml::Cache::init();
 
     khtml::NamespaceFactory::initIdTable();
     khtml::PrefixFactory::initIdTable();
     khtml::LocalNameFactory::initIdTable();
     DOM::emptyLocalName = DOM::LocalName::fromId(0);
     DOM::emptyPrefixName = DOM::PrefixName::fromId(0);
     DOM::emptyNamespaceName = DOM::NamespaceName::fromId(DOM::emptyNamespace);
     WebCore::SVGNames::init();
 }
 
 KHTMLGlobal::~KHTMLGlobal()
 {
     //qCDebug(KHTML_LOG) << this;
     if (s_self == this) {
         finalCheck();
         delete s_iconLoader;
         delete s_about;
         delete s_settings;
         delete KHTMLSettings::avFamilies;
         if (s_parts) {
             assert(s_parts->isEmpty());
             delete s_parts;
         }
         if (s_docs) {
             assert(s_docs->isEmpty());
             delete s_docs;
         }
 
         s_iconLoader = nullptr;
         s_about = nullptr;
         s_settings = nullptr;
         s_parts = nullptr;
         s_docs = nullptr;
         KHTMLSettings::avFamilies = nullptr;
 
         // clean up static data
         khtml::CSSStyleSelector::clear();
         khtml::RenderStyle::cleanup();
         khtml::RenderObject::cleanup();
         khtml::PaintBuffer::cleanup();
         khtml::MediaQueryEvaluator::cleanup();
         khtml::Cache::clear();
         khtml::cleanup_thaibreaks();
         khtml::ArenaFinish();
     } else {
         deref();
     }
 }
 
 void KHTMLGlobal::ref()
 {
     if (!s_refcnt && !s_self) {
         //qCDebug(KHTML_LOG) << "Creating KHTMLGlobal instance";
         // we can't use a staticdeleter here, because that would mean
         // that the KHTMLGlobal instance gets deleted from within a qPostRoutine, called
         // from the QApplication destructor. That however is too late, because
         // we want to destruct a KComponentData object, which involves destructing
         // a KConfig object, which might call KGlobal::dirs() (in sync()) which
         // probably is not going to work ;-)
         // well, perhaps I'm wrong here, but as I'm unsure I try to stay on the
         // safe side ;-) -> let's use a simple reference counting scheme
         // (Simon)
         new KHTMLGlobal; // does initial ref()
     } else {
         ++s_refcnt;
     }
     //qCDebug(KHTML_LOG) << "s_refcnt=" << s_refcnt;
 }
 
 void KHTMLGlobal::deref()
 {
     //qCDebug(KHTML_LOG) << "s_refcnt=" << s_refcnt - 1;
     if (!--s_refcnt && s_self) {
         delete s_self;
         s_self = nullptr;
     }
 }
 
 void KHTMLGlobal::registerPart(KHTMLPart *part)
 {
     //qCDebug(KHTML_LOG) << part;
     if (!s_parts) {
         s_parts = new QLinkedList<KHTMLPart *>;
     }
 
     if (!s_parts->contains(part)) {
         s_parts->append(part);
         ref();
     }
 }
 
 void KHTMLGlobal::deregisterPart(KHTMLPart *part)
 {
     //qCDebug(KHTML_LOG) << part;
     assert(s_parts);
 
     if (s_parts->removeAll(part)) {
         if (s_parts->isEmpty()) {
             delete s_parts;
             s_parts = nullptr;
         }
         deref();
     }
 }
 
 void KHTMLGlobal::registerDocumentImpl(DOM::DocumentImpl *doc)
 {
     //qCDebug(KHTML_LOG) << doc;
     if (!s_docs) {
         s_docs = new QLinkedList<DOM::DocumentImpl *>;
     }
 
     if (!s_docs->contains(doc)) {
         s_docs->append(doc);
         ref();
     }
 }
 
 void KHTMLGlobal::deregisterDocumentImpl(DOM::DocumentImpl *doc)
 {
     //qCDebug(KHTML_LOG) << doc;
     assert(s_docs);
 
     if (s_docs->removeAll(doc)) {
         if (s_docs->isEmpty()) {
             delete s_docs;
             s_docs = nullptr;
         }
         deref();
     }
 }
 
 const KAboutData &KHTMLGlobal::aboutData()
 {
     assert(s_self);
 
     if (!s_about) {
         s_about = new KAboutData("khtml", i18n("KHTML"), QStringLiteral(KHTML_VERSION_STRING),
                                  i18n("Embeddable HTML component"),
                                  KAboutLicense::LGPL);
         s_about->addAuthor(QStringLiteral("Lars Knoll"), QString(), "knoll@kde.org");
         s_about->addAuthor(QStringLiteral("Antti Koivisto"), QString(), "koivisto@kde.org");
         s_about->addAuthor(QStringLiteral("Waldo Bastian"), QString(), "bastian@kde.org");
         s_about->addAuthor(QStringLiteral("Dirk Mueller"), QString(), "mueller@kde.org");
         s_about->addAuthor(QStringLiteral("Peter Kelly"), QString(), "pmk@kde.org");
         s_about->addAuthor(QStringLiteral("Torben Weis"), QString(), "weis@kde.org");
         s_about->addAuthor(QStringLiteral("Martin Jones"), QString(), "mjones@kde.org");
         s_about->addAuthor(QStringLiteral("Simon Hausmann"), QString(), "hausmann@kde.org");
         s_about->addAuthor(QStringLiteral("Tobias Anton"), QString(), "anton@stud.fbi.fh-darmstadt.de");
 
     }
 
     return *s_about;
 }
 
 KIconLoader *KHTMLGlobal::iconLoader()
 {
     if (!s_iconLoader) {
         s_iconLoader = new KIconLoader(aboutData().componentName());
     }
 
     return s_iconLoader;
 }
 
 KHTMLSettings *KHTMLGlobal::defaultHTMLSettings()
 {
     assert(s_self);
     if (!s_settings) {
         s_settings = new KHTMLSettings();
     }
 
     return s_settings;
 }
 
 void KHTMLGlobal::finalCheck()
 {
 #ifndef NDEBUG
     if (s_refcnt) {
         if (s_parts && !s_parts->isEmpty()) {
             Q_FOREACH (KHTMLPart *part, *s_parts) {
                 qCWarning(KHTML_LOG) << "Part" << part->url() << "was not deleted";
             }
         }
         if (s_docs && !s_docs->isEmpty()) {
             Q_FOREACH (DOM::DocumentImpl *doc, *s_docs) {
                 qCWarning(KHTML_LOG) << "Document" << doc->URL() << "was not deleted";
             }
         }
     }
 #endif
 }