157 lines
3.8 KiB
C++
157 lines
3.8 KiB
C++
/*****************************************************************
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kwin - the KDE window manager
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Copyright (C) 1999, 2000 Daniel M. Duley <mosfet@kde.org>
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******************************************************************/
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#include <kglobal.h>
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#include <kconfig.h>
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#include <kstandarddirs.h>
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#include <kdesktopfile.h>
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#include <ksimpleconfig.h>
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#include <klocale.h>
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#include <klibloader.h>
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// X11/Qt conflict
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#undef Unsorted
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#include <qdir.h>
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#include <qfile.h>
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#include "plugins.h"
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#if 0
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#define lt_ptr lt_ptr_t
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#endif
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using namespace KWinInternal;
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const char* defaultPlugin = "libkwindefault";
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PluginMgr::PluginMgr()
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: QObject()
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{
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alloc_ptr = NULL;
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handle = 0;
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pluginStr = "kwin_undefined";
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updatePlugin();
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}
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PluginMgr::~PluginMgr()
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{
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if(handle) {
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// Call the plugin's cleanup function
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lt_ptr_t deinit_func = lt_dlsym(handle, "deinit");
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if (deinit_func)
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((void (*)())deinit_func)();
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lt_dlclose(handle);
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}
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}
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void PluginMgr::updatePlugin()
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{
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KConfig *config = KGlobal::config();
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config->reparseConfiguration();
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config->setGroup("Style");
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QString newPlugin = config->readEntry("PluginLib", defaultPlugin);
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if (newPlugin != pluginStr)
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loadPlugin(newPlugin);
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}
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Client* PluginMgr::allocateClient(Workspace *ws, WId w, bool tool)
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{
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// We are guaranteed to have a plugin loaded,
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// otherwise, kwin exits during loadPlugin - but verify anyway
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if (alloc_ptr)
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return(alloc_ptr(ws, w, tool));
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else
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return NULL;
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}
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// returns true if plugin was loaded successfully
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void PluginMgr::loadPlugin(QString nameStr)
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{
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static bool dlregistered = false;
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lt_dlhandle oldHandle = handle;
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handle = 0;
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if(!dlregistered) {
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dlregistered = true;
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lt_dlinit();
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}
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QString path = KLibLoader::findLibrary(QFile::encodeName(nameStr));
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// If the plugin was not found, try to find the default
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if (path.isEmpty()) {
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nameStr = defaultPlugin;
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path = KLibLoader::findLibrary(QFile::encodeName(nameStr));
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}
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// If no library was found, exit kwin with an error message
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if (path.isEmpty())
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shutdownKWin(i18n("No window decoration plugin library was found!"));
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// Check if this library is not already loaded.
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if(pluginStr == nameStr)
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return;
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// Try loading the requested plugin
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handle = lt_dlopen(QFile::encodeName(path));
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// If that fails, fall back to the default plugin
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if (!handle) {
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nameStr = defaultPlugin;
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path = KLibLoader::findLibrary(QFile::encodeName(nameStr));
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if (!path.isEmpty())
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handle = lt_dlopen(QFile::encodeName(path));
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}
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if (!handle)
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shutdownKWin(i18n("The default decoration plugin is corrupt "
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"and could not be loaded!"));
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// Call the plugin's initialisation function
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lt_ptr_t init_func = lt_dlsym(handle, "init");
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if (init_func)
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((void (*)())init_func)();
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lt_ptr_t alloc_func = lt_dlsym(handle, "allocate");
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if(alloc_func) {
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alloc_ptr = (Client* (*)(Workspace *ws, WId w, int tool))alloc_func;
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} else {
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qWarning("KWin: The library %s is not a KWin plugin.", path.latin1());
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lt_dlclose(handle);
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exit(1);
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}
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pluginStr = nameStr;
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emit resetAllClients();
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// Call the old plugin's cleanup function
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if(oldHandle) {
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lt_ptr_t deinit_func = lt_dlsym(oldHandle, "deinit");
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if (deinit_func)
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((void (*)())deinit_func)();
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lt_dlclose(oldHandle);
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}
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}
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void PluginMgr::resetPlugin()
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{
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lt_ptr_t reset_func = lt_dlsym(handle, "reset");
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if (reset_func)
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((void (*)())reset_func)();
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}
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void PluginMgr::shutdownKWin(const QString &error_msg)
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{
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qWarning( (i18n("KWin: ") + error_msg +
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i18n("\nKWin will now exit...")).latin1() );
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exit(1);
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}
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#include "plugins.moc"
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