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327 lines
8.3 KiB
327 lines
8.3 KiB
/* ksim - a system monitor for kde
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*
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* Copyright (C) 2001 Robbie Ward <linuxphreak@gmx.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "pluginloader.h"
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#include "pluginloader.moc"
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#include <kdebug.h>
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#include <klibloader.h>
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#include <kdesktopfile.h>
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#include <klocale.h>
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#include <kglobal.h>
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#include <kstandarddirs.h>
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#include <kmessagebox.h>
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#include <tqstringlist.h>
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class KSim::PluginInfo::Private
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{
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public:
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};
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KSim::PluginInfo::~PluginInfo()
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{
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}
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const TQString &KSim::PluginInfo::name() const
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{
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return m_name;
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}
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TQCString KSim::PluginInfo::libName(bool includePrefix) const
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{
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return (includePrefix ? "ksim_" + m_libName : m_libName);
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}
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const TQString &KSim::PluginInfo::location() const
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{
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return m_location;
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}
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KSim::PluginInfo::PluginInfo()
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{
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}
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class KSim::PluginLoader::Private
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{
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public:
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typedef KSim::PluginObject *(PluginPtr)(const char *);
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KSim::PluginList pluginList;
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TQString error;
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TQString lib;
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bool lastLoaded;
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static const char *const ksimString;
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};
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const char *const KSim::PluginLoader::Private::ksimString = "ksim_";
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KSim::PluginLoader *KSim::PluginLoader::m_instance = 0; // initialize pointer
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KSim::PluginLoader &KSim::PluginLoader::self()
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{
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if (!m_instance) // is it the first call?
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m_instance = new PluginLoader; // create sole instance
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return *m_instance; // address of sole instance
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}
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KSim::PluginLoader::~PluginLoader()
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{
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unloadAllPlugins();
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delete d;
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}
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bool KSim::PluginLoader::loadPlugin(const KDesktopFile &file)
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{
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switch (createPlugin(file)) {
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case KSim::PluginLoader::EmptyLibName:
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KMessageBox::error(0, i18n("KSim was unable to load the plugin %1"
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" due to the X-KSIM-LIBRARY property being empty in the"
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" plugins desktop file").arg(file.readName()));
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return false;
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break;
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case KSim::PluginLoader::LibNotFound:
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KMessageBox::error(0, i18n("KSim was unable to load the plugin %1"
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" due to not being able to find the plugin, check that the plugin"
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" is installed and is in your $TDEDIR/lib path").arg(file.readName()));
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return false;
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break;
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case KSim::PluginLoader::UnSymbols:
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KMessageBox::error(0, i18n("<qt>An error occurred while trying \n"
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"to load the plugin '%1'. \nThis could be caused by the"
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" following:<ul>\n<li>The plugin doesn't have the %2"
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" macro</li>\n<li>The plugin has been damaged or has"
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" some unresolved symbols</li>\n</ul> \nLast"
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" error message that occurred: \n%3</qt>")
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.arg(d->lib.prepend("ksim_")).arg("KSIM_INIT_PLUGIN")
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.arg(d->error));
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return false;
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break;
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default:
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break;
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}
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return true;
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}
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bool KSim::PluginLoader::unloadPlugin(const TQCString &name)
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{
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if (name.isEmpty())
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return false;
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// see if our plugin is loaded
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KSim::Plugin plugin = find(name);
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if (plugin.isNull())
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return false;
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// try to unload the library
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kdDebug(2003) << "Unloading plugin " << plugin.libName() << endl;
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KLibLoader::self()->unloadLibrary(plugin.libName());
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d->pluginList.remove(plugin);
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return true;
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}
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void KSim::PluginLoader::unloadAllPlugins()
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{
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kdDebug(2003) << "Unloading all plugins" << endl;
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// Go through the plugin list and unload each plugin;
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KSim::PluginList::ConstIterator it;
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for (it = d->pluginList.begin(); it != d->pluginList.end(); ++it) {
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KLibLoader::self()->unloadLibrary((*it).libName());
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}
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// Clear the plugin list;
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d->pluginList.clear();
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KLibLoader::cleanUp();
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}
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bool KSim::PluginLoader::isLoaded(const KSim::Plugin &info) const
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{
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return isLoaded(info.libName());
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}
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bool KSim::PluginLoader::isLoaded(const TQCString &library) const
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{
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if (library.isEmpty())
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return false;
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return !find(library).isNull();
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}
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KSim::PluginInfo KSim::PluginLoader::findPluginInfo(const TQString &name,
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SearchType type) const
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{
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TQString location;
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switch (type) {
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case Name: {
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TQStringList files = KGlobal::dirs()->findAllResources("data", "ksim/monitors/*.desktop");
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TQStringList::ConstIterator it;
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for (it = files.begin(); it != files.end(); ++it) {
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KDesktopFile file((*it));
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if (file.readName() == name) {
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location = (*it);
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break;
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}
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}
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break;
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}
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case LibName: {
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TQStringList files = KGlobal::dirs()->findAllResources("data", "ksim/monitors/*.desktop");
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TQStringList::ConstIterator it;
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for (it = files.begin(); it != files.end(); ++it) {
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KDesktopFile file((*it));
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if (file.readEntry("X-KSIM-LIBRARY") == name) {
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location = (*it);
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break;
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}
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}
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break;
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}
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case DesktopFile: {
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if (!KDesktopFile::isDesktopFile(name))
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return KSim::PluginInfo();
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location = name;
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break;
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}
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}
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KDesktopFile file(location);
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KSim::PluginInfo info;
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info.m_name = file.readName();
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info.m_libName = file.readEntry("X-KSIM-LIBRARY").local8Bit();
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info.m_location = location;
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return info;
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}
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KSim::Plugin &KSim::PluginLoader::find(const TQCString &libName)
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{
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if (libName.isEmpty())
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return KSim::Plugin::null;
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TQCString library(libName);
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if (libName.find(Private::ksimString) == -1)
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library.prepend(Private::ksimString);
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KSim::PluginList::Iterator it;
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for (it = d->pluginList.begin(); it != d->pluginList.end(); ++it) {
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if ((*it).libName() == library)
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return (*it);
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}
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return KSim::Plugin::null;
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}
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const KSim::Plugin &KSim::PluginLoader::find(const TQCString &libName) const
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{
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if (libName.isEmpty())
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return KSim::Plugin::null;
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TQCString library(libName);
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if (libName.find(Private::ksimString) == -1)
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library.prepend(Private::ksimString);
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KSim::PluginList::ConstIterator it;
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for (it = d->pluginList.begin(); it != d->pluginList.end(); ++it) {
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if ((*it).libName() == library)
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return (*it);
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}
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return KSim::Plugin::null;
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}
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KSim::Plugin &KSim::PluginLoader::find(const KSim::PluginInfo &info)
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{
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return find(info.libName());
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}
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const KSim::Plugin &KSim::PluginLoader::find(const KSim::PluginInfo &info) const
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{
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return find(info.libName());
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}
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const KSim::PluginList &KSim::PluginLoader::pluginList() const
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{
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return d->pluginList;
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}
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KSim::PluginList &KSim::PluginLoader::pluginList()
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{
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return d->pluginList;
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}
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const KSim::Plugin &KSim::PluginLoader::plugin() const
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{
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return (d->lastLoaded ? d->pluginList.last() : KSim::Plugin::null);
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}
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KSim::Plugin &KSim::PluginLoader::plugin()
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{
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return (d->lastLoaded ? d->pluginList.last() : KSim::Plugin::null);
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}
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KSim::PluginLoader::PluginLoader() : TQObject(0, "PluginLoader")
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{
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d = new KSim::PluginLoader::Private;
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d->lastLoaded = false;
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}
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void KSim::PluginLoader::cleanup()
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{
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if (!m_instance)
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return;
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delete m_instance;
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m_instance = 0;
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}
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KSim::PluginLoader::ErrorCode KSim::PluginLoader::createPlugin(const KDesktopFile &file)
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{
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d->error = TQString();
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TQCString pluginName(file.readEntry("X-KSIM-LIBRARY").local8Bit());
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if (pluginName.isEmpty())
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return EmptyLibName;
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TQCString libName(Private::ksimString + pluginName);
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KLibrary *library = KLibLoader::self()->library(libName);
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if (!library)
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return LibNotFound;
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TQCString symbol("init_plugin");
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if (Private::PluginPtr *create = (Private::PluginPtr *)(library->symbol(symbol))) {
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d->pluginList.append(KSim::Plugin(create(pluginName), file));
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d->lib = TQString();
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d->lastLoaded = true;
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}
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else {
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d->error = KLibLoader::self()->lastErrorMessage().isEmpty() ?
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i18n("Unable to get last error message") :
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KLibLoader::self()->lastErrorMessage();
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KLibLoader::self()->unloadLibrary(libName);
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d->lib = pluginName;
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d->lastLoaded = false;
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return UnSymbols;
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}
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emit pluginLoaded(d->pluginList.last());
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return LibLoaded;
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}
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