pluginmanager.cpp

   1 /*
   2   pluginmanager.cpp
   3
   4   This file is part of GammaRay, the Qt application inspection and
   5   manipulation tool.
   6
   7   Copyright (C) 2010-2011 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
   8   Author: Kevin Funk <kevin.funk@kdab.com>
   9
  10   This program is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU General Public License as published by
  12   the Free Software Foundation, either version 2 of the License, or
  13   (at your option) any later version.
  14
  15   This program is distributed in the hope that it will be useful,
  16   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18   GNU General Public License for more details.
  19
  20   You should have received a copy of the GNU General Public License
  21   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "pluginmanager.h"
  25
  26 #include "config-gammaray.h"
  27
  28 #include <QCoreApplication>
  29 #include <QStringList>
  30 #include <QDebug>
  31 #include <QDir>
  32 #include <QLibrary>
  33
  34 #include <QPluginLoader>
  35 #include "proxytoolfactory.h"
  36
  37 #define IF_DEBUG(x)
  38
  39 using namespace GammaRay;
  40 using namespace std;
  41
  42 static const QLatin1String GAMMARAY_PLUGIN_SUFFIX("gammaray");
  43 PluginManager *PluginManager::s_instance = 0;
  44
  45 PluginManager *PluginManager::instance()
  46 {
  47   if (!s_instance) {
  48     s_instance = new PluginManager();
  49     s_instance->scan();
  50   }
  51   return s_instance;
  52 }
  53
  54 PluginManager::PluginManager()
  55 {
  56   QCoreApplication::addLibraryPath(QLatin1String(GAMMARAY_PLUGIN_INSTALL_DIR));
  57 }
  58
  59 QStringList PluginManager::pluginPaths() const
  60 {
  61   QStringList pluginPaths;
  62
  63   // add plugins from gammaray's build directory
  64   pluginPaths << QLatin1String(GAMMARAY_BUILD_DIR) +
  65     QDir::separator() + "lib" +
  66     QDir::separator() + "plugins" +
  67     QDir::separator() + GAMMARAY_PLUGIN_SUFFIX;
  68
  69   QStringList libraryPaths = QCoreApplication::libraryPaths();
  70   foreach (const QString &libraryPath, libraryPaths) {
  71     pluginPaths << libraryPath + QDir::separator() + GAMMARAY_PLUGIN_SUFFIX;
  72   }
  73
  74   return pluginPaths;
  75 }
  76
  77 void PluginManager::scan()
  78 {
  79   // TODO: temporary work-around to avoid loading the same plugin two times
  80   // should be fixed when providing valid plugin spec files
  81   QStringList loadedPluginNames;
  82
  83   foreach (const QString &pluginPath, pluginPaths()) {
  84     const QDir dir(pluginPath);
  85     IF_DEBUG(cout << "checking plugin path: " << qPrintable(dir.absolutePath()) << endl);
  86     foreach (const QString &plugin, dir.entryList(QDir::Files)) {
  87       const QString pluginFile = dir.absoluteFilePath(plugin);
  88       const QFileInfo pluginInfo(pluginFile);
  89       const QString pluginName = pluginInfo.baseName();
  90
  91       if (loadedPluginNames.contains(pluginName)) {
  92         cout << "not loading plugin, already loaded: " << qPrintable(pluginFile) << endl;
  93         continue;
  94       }
  95
  96       if (pluginInfo.suffix() == QLatin1String("desktop")) {
  97         ProxyToolFactory *proxy = new ProxyToolFactory(pluginFile);
  98         if (!proxy->isValid()) {
  99           std::cerr << "invalid plugin " << qPrintable(pluginFile) << std::endl;
 100           delete proxy;
 101         } else {
 102           IF_DEBUG(cout << "plugin looks valid " << qPrintable(pluginFile) << endl;)
 103           m_plugins.push_back(proxy);
 104           loadedPluginNames << pluginName;
 105         }
 106       }
 107     }
 108   }
 109 }
 110
 111 QVector<ToolFactory *> PluginManager::plugins()
 112 {
 113   return m_plugins;
 114 }