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Diffstat (limited to 'kwin/lib/kdecoration_plugins_p.cpp')
| -rw-r--r-- | kwin/lib/kdecoration_plugins_p.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/kwin/lib/kdecoration_plugins_p.cpp b/kwin/lib/kdecoration_plugins_p.cpp new file mode 100644 index 000000000..85d496105 --- /dev/null +++ b/kwin/lib/kdecoration_plugins_p.cpp @@ -0,0 +1,199 @@ +/***************************************************************** +This file is part of the KDE project. + +Copyright (C) 1999, 2000 Daniel M. Duley <mosfet@kde.org> +Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org> + +Permission is hereby granted, free of charge, to any person obtaining a +copy of this software and associated documentation files (the "Software"), +to deal in the Software without restriction, including without limitation +the rights to use, copy, modify, merge, publish, distribute, sublicense, +and/or sell copies of the Software, and to permit persons to whom the +Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. +******************************************************************/ + +#include "kdecoration_plugins_p.h" + +#include <kconfig.h> +#include <kdebug.h> +#include <klocale.h> +#include <klibloader.h> +#include <assert.h> + +#include <qdir.h> +#include <qfile.h> + +#include "kdecorationfactory.h" + +KDecorationPlugins::KDecorationPlugins( KConfig* cfg ) + : create_ptr( NULL ), + library( NULL ), + fact( NULL ), + old_library( NULL ), + old_fact( NULL ), + pluginStr( "kwin3_undefined " ), + config( cfg ) + { + } + +KDecorationPlugins::~KDecorationPlugins() + { + if(library) + { + assert( fact != NULL ); + delete fact; + library->unload(); + } + if(old_library) + { + assert( old_fact != NULL ); + delete old_fact; + old_library->unload(); + } + } + +bool KDecorationPlugins::reset( unsigned long changed ) + { + QString oldPlugin = pluginStr; + config->reparseConfiguration(); + bool ret = false; + if(( !loadPlugin( "" ) && library ) // "" = read the one in cfg file + || oldPlugin == pluginStr ) + { // no new plugin loaded, reset the old one + assert( fact != NULL ); + ret = fact->reset( changed ); + } + return ret || oldPlugin != pluginStr; + } + +KDecorationFactory* KDecorationPlugins::factory() + { + return fact; + } + +// convenience +KDecoration* KDecorationPlugins::createDecoration( KDecorationBridge* bridge ) + { + if( fact != NULL ) + return fact->createDecoration( bridge ); + return NULL; + } + +// returns true if plugin was loaded successfully +bool KDecorationPlugins::loadPlugin( QString nameStr ) + { + if( nameStr.isEmpty()) + { + KConfigGroupSaver saver( config, "Style" ); + nameStr = config->readEntry("PluginLib", defaultPlugin ); + } + // make sure people can switch between HEAD and kwin_iii branch + if( nameStr.startsWith( "kwin_" )) + nameStr = "kwin3_" + nameStr.mid( 5 ); + + KLibrary *oldLibrary = library; + KDecorationFactory* oldFactory = fact; + + QString path = KLibLoader::findLibrary(QFile::encodeName(nameStr)); + + // If the plugin was not found, try to find the default + if (path.isEmpty()) + { + nameStr = defaultPlugin; + path = KLibLoader::findLibrary(QFile::encodeName(nameStr)); + } + + // If no library was found, exit kwin with an error message + if (path.isEmpty()) + { + error( i18n("No window decoration plugin library was found." )); + return false; + } + + // Check if this library is not already loaded. + if(pluginStr == nameStr) + return true; + + // Try loading the requested plugin + library = KLibLoader::self()->library(QFile::encodeName(path)); + + // If that fails, fall back to the default plugin + if (!library) + { + kdDebug() << " could not load library, try default plugin again" << endl; + nameStr = defaultPlugin; + if ( pluginStr == nameStr ) + return true; + path = KLibLoader::findLibrary(QFile::encodeName(nameStr)); + if (!path.isEmpty()) + library = KLibLoader::self()->library(QFile::encodeName(path)); + } + + if (!library) + { + error( i18n("The default decoration plugin is corrupt " + "and could not be loaded." )); + return false; + } + + create_ptr = NULL; + if( library->hasSymbol("create_factory")) + { + void* create_func = library->symbol("create_factory"); + if(create_func) + create_ptr = (KDecorationFactory* (*)())create_func; + } + if(!create_ptr) + { + error( i18n( "The library %1 is not a KWin plugin." ).arg( path )); + library->unload(); + return false; + } + fact = create_ptr(); + fact->checkRequirements( this ); // let it check what is supported + + pluginStr = nameStr; + + // For clients in kdeartwork + QString catalogue = nameStr; + catalogue.replace( "kwin3_", "kwin_" ); + KGlobal::locale()->insertCatalogue( catalogue ); + // For KCommonDecoration based clients + KGlobal::locale()->insertCatalogue( "kwin_lib" ); + // For clients in kdebase + KGlobal::locale()->insertCatalogue( "kwin_clients" ); + // For clients in kdeartwork + KGlobal::locale()->insertCatalogue( "kwin_art_clients" ); + + old_library = oldLibrary; // save for delayed destroying + old_fact = oldFactory; + + return true; +} + +void KDecorationPlugins::destroyPreviousPlugin() +{ + // Destroy the old plugin + if(old_library) + { + delete old_fact; + old_fact = NULL; + old_library->unload(); + old_library = NULL; + } +} + +void KDecorationPlugins::error( const QString& ) + { + } |