kwin/libkdecorations/kdecoration_plugins_p.cpp

275 lines
8 KiB
C++
Raw Normal View History

/*****************************************************************
// vim: sw=4 sts=4 et tw=100
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 <klibrary.h>
#include <kconfiggroup.h>
#include <KDE/KLocalizedString>
#include <KDE/KGlobal>
#include <assert.h>
#include <QDir>
#include <QFile>
#include "kdecorationfactory.h"
KDecorationPlugins::KDecorationPlugins(const KSharedConfigPtr &cfg)
2011-01-30 14:34:42 +00:00
: create_ptr(NULL),
library(NULL),
fact(NULL),
old_library(NULL),
old_fact(NULL),
pluginStr(QStringLiteral("kwin3_undefined ")),
2011-01-30 14:34:42 +00:00
config(cfg)
{
}
KDecorationPlugins::~KDecorationPlugins()
2011-01-30 14:34:42 +00:00
{
if (library) {
assert(fact != NULL);
delete fact;
2011-01-30 14:34:42 +00:00
library->unload();
}
if (old_library) {
assert(old_fact != NULL);
delete old_fact;
2011-01-30 14:34:42 +00:00
old_library->unload();
}
2011-01-30 14:34:42 +00:00
}
QString KDecorationPlugins::currentPlugin()
2011-01-30 14:34:42 +00:00
{
return pluginStr;
2011-01-30 14:34:42 +00:00
}
2011-01-30 14:34:42 +00:00
bool KDecorationPlugins::reset(unsigned long changed)
{
QString oldPlugin = pluginStr;
config->reparseConfiguration();
bool ret = false;
if ((!loadPlugin(QString()) && library) // "" = read the one in cfg file
2011-01-30 14:34:42 +00:00
|| oldPlugin == pluginStr) {
// no new plugin loaded, reset the old one
// assert( fact != NULL );
if (fact != NULL) {
ret = fact->reset(changed);
}
2011-01-30 14:34:42 +00:00
}
2011-01-30 14:34:42 +00:00
return ret || oldPlugin != pluginStr;
}
KDecorationFactory* KDecorationPlugins::factory()
2011-01-30 14:34:42 +00:00
{
return fact;
2011-01-30 14:34:42 +00:00
}
const KDecorationFactory *KDecorationPlugins::factory() const
{
return fact;
}
// convenience
2011-01-30 14:34:42 +00:00
KDecoration* KDecorationPlugins::createDecoration(KDecorationBridge* bridge)
{
if (fact != NULL)
return fact->createDecoration(bridge);
return NULL;
2011-01-30 14:34:42 +00:00
}
// tests whether the plugin can be loaded
bool KDecorationPlugins::canLoad(QString nameStr, KLibrary **loadedLib)
2011-01-30 14:34:42 +00:00
{
if (nameStr.isEmpty())
return false; // we can't load that
// Check if this library is not already loaded.
if (pluginStr == nameStr) {
if (loadedLib) {
*loadedLib = library;
}
return true;
2011-01-30 14:34:42 +00:00
}
KConfigGroup group(config, QStringLiteral("Style"));
if (group.readEntry<bool>("NoPlugin", false)) {
error(i18n("Loading of window decoration plugin library disabled in configuration."));
return false;
}
KLibrary libToFind(nameStr);
QString path = libToFind.fileName();
2011-01-30 14:34:42 +00:00
kDebug(1212) << "kwin : path " << path << " for " << nameStr;
2011-01-30 14:34:42 +00:00
if (path.isEmpty()) {
return false;
2011-01-30 14:34:42 +00:00
}
// Try loading the requested plugin
KLibrary *lib = new KLibrary(path);
if (!lib)
return false;
// TODO this would be a nice shortcut, but for "some" reason QtCurve with wrong ABI slips through
// TODO figure where it's loaded w/o being unloaded and check whether that can be fixed.
#if 0
if (lib->isLoaded()) {
if (loadedLib) {
*loadedLib = lib;
}
return true;
2011-01-30 14:34:42 +00:00
}
#endif
// so we check whether this lib was loaded before and don't unload it in case
bool wasLoaded = lib->isLoaded();
KDecorationFactory*(*cptr)() = NULL;
int (*vptr)() = NULL;
int deco_version = 0;
KLibrary::void_function_ptr version_func = lib->resolveFunction("decoration_version");
if (version_func) {
vptr = (int(*)())version_func;
deco_version = vptr();
}
if (deco_version != KWIN_DECORATION_API_VERSION) {
if (version_func)
kWarning(1212) << i18n("The library %1 has wrong API version %2", path, deco_version);
lib->unload();
delete lib;
return false;
}
KLibrary::void_function_ptr create_func = lib->resolveFunction("create_factory");
if (create_func)
cptr = (KDecorationFactory * (*)())create_func;
if (!cptr) {
kDebug(1212) << i18n("The library %1 is not a KWin plugin.", path);
lib->unload();
delete lib;
return false;
}
if (loadedLib) {
*loadedLib = lib;
} else {
if (!wasLoaded)
lib->unload();
delete lib;
}
return true;
}
// returns true if plugin was loaded successfully
bool KDecorationPlugins::loadPlugin(QString nameStr)
{
KConfigGroup group(config, QStringLiteral("Style"));
if (nameStr.isEmpty()) {
nameStr = group.readEntry("PluginLib", defaultPlugin);
}
// Check if this library is not already loaded.
if (pluginStr == nameStr)
return true;
KLibrary *oldLibrary = library;
KDecorationFactory* oldFactory = fact;
if (!canLoad(nameStr, &library)) {
// If that fails, fall back to the default plugin
nameStr = defaultPlugin;
if (!canLoad(nameStr, &library)) {
// big time trouble!
// -> exit kwin with an error message
error(i18n("The default decoration plugin is corrupt and could not be loaded."));
return false;
}
}
// guarded by "canLoad"
KLibrary::void_function_ptr create_func = library->resolveFunction("create_factory");
2011-01-30 14:34:42 +00:00
if (create_func)
create_ptr = (KDecorationFactory * (*)())create_func;
if (!create_ptr) { // this means someone probably attempted to load "some" kwin plugin/lib as deco
// and thus cheated on the "isLoaded" shortcut -> try the default and yell a warning
2011-01-30 14:34:42 +00:00
if (nameStr != defaultPlugin) {
kWarning(1212) << i18n("The library %1 was attempted to be loaded as a decoration plugin but it is NOT", nameStr);
return loadPlugin(defaultPlugin);
} else {
// big time trouble!
// -> exit kwin with an error message
error(i18n("The default decoration plugin is corrupt and could not be loaded."));
return false;
2011-01-30 14:34:42 +00:00
}
}
fact = create_ptr();
2011-01-30 14:34:42 +00:00
fact->checkRequirements(this); // let it check what is supported
pluginStr = nameStr;
// For clients in kdeartwork
2013-07-22 14:18:47 +00:00
#warning insertCatalog needs porting
#if KWIN_QT5_PORTING
QString catalog = nameStr;
2011-01-30 14:34:42 +00:00
catalog.replace("kwin3_", "kwin_");
KGlobal::locale()->insertCatalog(catalog);
// For KCommonDecoration based clients
KGlobal::locale()->insertCatalog("libkdecorations");
// For clients in kdebase
2011-01-30 14:34:42 +00:00
KGlobal::locale()->insertCatalog("kwin_clients");
// For clients in kdeartwork
2011-01-30 14:34:42 +00:00
KGlobal::locale()->insertCatalog("kwin_art_clients");
2013-07-22 14:18:47 +00:00
#endif
old_library = oldLibrary; // save for delayed destroying
old_fact = oldFactory;
return true;
}
void KDecorationPlugins::destroyPreviousPlugin()
{
// Destroy the old plugin
2011-01-30 14:34:42 +00:00
if (old_library) {
delete old_fact;
old_fact = NULL;
2011-01-30 14:34:42 +00:00
old_library->unload();
delete old_library;
old_library = NULL;
2011-01-30 14:34:42 +00:00
}
}
2011-01-30 14:34:42 +00:00
void KDecorationPlugins::error(const QString&)
{
}