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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "pluginpath.h"
#include "pluginmanager.h"
#include <iplugin.h>
#include <QLibrary>
#include <QPluginLoader>
#include <QFileInfo>
#include <QCoreApplication>
#include <QStandardItem>
#include <QObject>
#include <QDebug>
enum { debug = 1 };
namespace QmlDesigner {
// Initialize and create instance of a plugin from scratch,
// that is, make sure the library is loaded and has an instance
// of the IPlugin type. Once something fails, mark it as failed
// ignore it from then on.
static IPlugin *instance(PluginData &p)
{
// Go stale once something fails
if (p.failed)
return 0;
// Pull up the plugin, retrieve IPlugin instance.
if (!p.instanceGuard) {
p.instance = 0;
QPluginLoader loader(p.path);
if (!(loader.isLoaded() || loader.load())) {
p.failed = true;
p.errorMessage = loader.errorString();
return 0;
}
QObject *object = loader.instance();
if (!object) {
p.failed = true;
p.errorMessage = QCoreApplication::translate("WidgetPluginManager", "Failed to create instance.");
return 0;
}
IPlugin *iplugin = qobject_cast<IPlugin *>(object);
if (!iplugin) {
p.failed = true;
p.errorMessage = QCoreApplication::translate("WidgetPluginManager", "Not a QmlDesigner plugin.");
delete object;
return 0;
}
p.instanceGuard = object;
p.instance = iplugin;
}
// Ensure it is initialized
/*if (!p.instance->isInitialized()) {
if (!p.instance->initialize(&p.errorMessage)) {
p.failed = true;
delete p.instance;
p.instance = 0;
return 0;
}
}*/
return p.instance;
}
PluginData::PluginData(const QString &p) :
path(p),
failed(false),
instance(0)
{
}
PluginPath::PluginPath(const QDir &path) :
m_path(path),
m_loaded(false)
{
}
// Determine a unique list of library files in that directory
QStringList PluginPath::libraryFilePaths(const QDir &dir)
{
const QFileInfoList infoList = dir.entryInfoList(QDir::Files|QDir::Readable|QDir::NoDotAndDotDot);
if (infoList.empty())
return QStringList();
// Load symbolic links but make sure all file names are unique as not
// to fall for something like 'libplugin.so.1 -> libplugin.so'
QStringList result;
const QFileInfoList::const_iterator icend = infoList.constEnd();
for (QFileInfoList::const_iterator it = infoList.constBegin(); it != icend; ++it) {
QString fileName;
if (it->isSymLink()) {
const QFileInfo linkTarget = QFileInfo(it->symLinkTarget());
if (linkTarget.exists() && linkTarget.isFile())
fileName = linkTarget.absoluteFilePath();
} else {
fileName = it->absoluteFilePath();
}
if (!fileName.isEmpty() && QLibrary::isLibrary(fileName) && !result.contains(fileName))
result += fileName;
}
qDebug() << "Library file paths: " << result;
return result;
}
void PluginPath::clear()
{
m_loaded = false;
m_plugins.clear();
}
void PluginPath::ensureLoaded()
{
if (!m_loaded) {
const QStringList libraryFiles = libraryFilePaths(m_path);
if (debug)
qDebug() << "Checking " << libraryFiles.size() << " plugins " << m_path.absolutePath();
foreach (const QString &libFile, libraryFiles)
m_plugins.push_back(PluginData(libFile));
m_loaded = true;
}
}
void PluginPath::getInstances(PluginManager::IPluginList *list)
{
ensureLoaded();
// Compile list of instances
if (m_plugins.empty())
return;
const PluginDataList::iterator end = m_plugins.end();
for (PluginDataList::iterator it = m_plugins.begin(); it != end; ++it)
if (IPlugin *i = instance(*it))
list->push_back(i);
}
QStandardItem *PluginPath::createModelItem()
{
ensureLoaded();
// Create a list of plugin lib files with classes.
// If there are failed ones, create a separate "Failed"
// category at the end
QStandardItem *pathItem = new QStandardItem(m_path.absolutePath());
QStandardItem *failedCategory = 0;
const PluginDataList::iterator end = m_plugins.end();
for (PluginDataList::iterator it = m_plugins.begin(); it != end; ++it) {
QStandardItem *pluginItem = new QStandardItem(QFileInfo(it->path).fileName());
if (instance(*it)) {
pluginItem->appendRow(new QStandardItem(QString::fromUtf8(it->instanceGuard->metaObject()->className())));
pathItem->appendRow(pluginItem);
} else {
pluginItem->setToolTip(it->errorMessage);
if (!failedCategory) {
const QString failed = QCoreApplication::translate("PluginManager", "Failed Plugins");
failedCategory = new QStandardItem(failed);
}
failedCategory->appendRow(pluginItem);
}
}
if (failedCategory)
pathItem->appendRow(failedCategory);
return pathItem;
}
} // namespace QmlDesigner
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