gui_plugin_manager.cpp

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#include "gui/plugin_relay/gui_plugin_manager.h"
#include "gui/gui_globals.h"
#include "gui/gui_utils/graphics.h"
#include "gui/main_window/plugin_parameter_dialog.h"
#include "hal_core/plugin_system/plugin_manager.h"
#include "hal_core/plugin_system/gui_extension_interface.h"
#include "hal_core/plugin_system/cli_extension_interface.h"
#include "hal_core/plugin_system/plugin_interface_ui.h"
#include "hal_core/netlist/netlist_parser/netlist_parser_manager.h"
#include "hal_core/utilities/log.h"
#include <QMap>
#include <QDir>
#include <iostream>
#include <filesystem>
#include <QDateTime>
#include <QSettings>
#include <QBrush>
#include <QApplication>
#include <QPainter>
#include <QPushButton>
#include <QMouseEvent>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QMessageBox>
#include <QFileDialog>
 
namespace hal {
 
 
    GuiPluginManager::GuiPluginManager(QWidget *parent)
        : QWidget(parent),
          mDefaultTextColor(Qt::lightGray),
          mHilightTextColor(Qt::yellow),
          mHilightBackgroundColor(Qt::black)
    {
        QVBoxLayout* layout = new QVBoxLayout(this);
 
        mGuiPluginView = new GuiPluginView(this);
        mGuiPluginTable = new GuiPluginTable(this);
        connect(mGuiPluginTable,&GuiPluginTable::toggleEnableGuiContribution,this,&GuiPluginManager::handleToggleGuiContribution);
        connect(mGuiPluginTable,&GuiPluginTable::showCliOptions,this,&GuiPluginManager::handleShowCliOptions);
        connect(gPluginRelay,&PluginRelay::pluginLoaded,mGuiPluginTable,&GuiPluginTable::handlePluginLoaded);
        connect(gPluginRelay,&PluginRelay::pluginUnloaded,mGuiPluginTable,&GuiPluginTable::handlePluginUnloaded);
        gPluginRelay->mGuiPluginTable = mGuiPluginTable;
        mGuiPluginView->setModel(mGuiPluginTable);
 
        mGuiPluginDelegate = new GuiPluginDelegate(this);
        connect(mGuiPluginDelegate,&GuiPluginDelegate::buttonPressed,mGuiPluginTable,&GuiPluginTable::handleButtonPressed);
        mGuiPluginView->setItemDelegateForColumn(10,mGuiPluginDelegate);
        mGuiPluginView->setItemDelegateForColumn(8,mGuiPluginDelegate);
        mGuiPluginView->setItemDelegateForColumn(7,mGuiPluginDelegate);
        mGuiPluginView->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
        mGuiPluginView->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
        mGuiPluginView->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
        layout->addWidget(mGuiPluginView,Qt::AlignLeft);
 
        QLabel* legendHeader = new QLabel("Buttons used in table above:", this);
        legendHeader->setFixedHeight(48);
        layout->addWidget(legendHeader,Qt::AlignLeft);
        QLabel* ltext[4] = {
            new QLabel("Load HAL plugin and dependencies (if any)", this),
            new QLabel("Unload HAL plugin unless needed as dependency by other plugin", this),
            new QLabel("This plugin contributes CLI options. Click button for description of options.", this),
            new QLabel("Enable or disable plugin contributions to GUI context menu.", this)};
 
        for (int i=0; i<4; i++)
        {
            QHBoxLayout* legend = new QHBoxLayout;
            mIconLegend[i] = new QLabel(this);
            mIconLegend[i]->setAlignment(Qt::AlignCenter);
            mIconLegend[i]->setFixedSize(52,52);
            legend->addWidget(mIconLegend[i]);
            ltext[i]->setIndent(8);
            legend->addWidget(ltext[i]);
            layout->addLayout(legend);
        }
 
        QHBoxLayout* buttonLayout = new QHBoxLayout;
        buttonLayout->setAlignment(Qt::AlignRight);
        QPushButton* butCancel  = new QPushButton("Back to netlist", this);
        connect(butCancel,&QPushButton::clicked,this,&GuiPluginManager::handleButtonCancel);
        buttonLayout->addWidget(butCancel);
        QPushButton* butRefresh = new QPushButton("Refresh", this);
        connect(butRefresh,&QPushButton::clicked,mGuiPluginTable,&GuiPluginTable::handleRefresh);
        buttonLayout->addWidget(butRefresh);
        layout->addLayout(buttonLayout);
    }
 
    void GuiPluginManager::addPluginActions(QMenu* menu) const
    {
        bool hasEntries = false;
        QMap<QString,GuiExtensionInterface*> guiExtensionMap = GuiPluginManager::getGuiExtensions();
        for(auto it = guiExtensionMap.constBegin(); it!= guiExtensionMap.constEnd(); ++it)
        {
            GuiExtensionInterface* geif = it.value();
 
            if (!geif->is_contribution_enabled())
                continue;
 
            std::vector<PluginParameter> plugParams = geif->get_parameter();
            if (plugParams.empty())
                continue;
 
            QString label = QString::fromStdString(geif->contribution_top_label());
            if (label.isEmpty()) label = it.key();
            menu->addAction(label, [label,geif,menu]() { PluginParameterDialog ppd(label,geif,menu); ppd.exec(); });
            hasEntries = true;
        }
 
        menu->setEnabled(hasEntries);
    }
 
 
    void GuiPluginManager::repolish()
    {
        QStyle* s = style();
 
        s->unpolish(this);
        s->polish(this);
        mGuiPluginDelegate->updateQss(this);
        QIcon tmpIcon;
        for (int i=0; i<4; i++)
        {
            switch (i)
            {
            case 0: tmpIcon = gui_utility::getStyledSvgIcon(loadIconStyle(),loadIconPath());     break;
            case 1: tmpIcon = gui_utility::getStyledSvgIcon(unloadIconStyle(),unloadIconPath()); break;
            case 2: tmpIcon = gui_utility::getStyledSvgIcon(cliIconStyle(),cliIconPath());       break;
            case 3: tmpIcon = gui_utility::getStyledSvgIcon(guiIconEnabledStyle(),guiIconEnabledPath());       break;
            }
            mIconLegend[i]->setPixmap(tmpIcon.pixmap(32,32));
        }
    }
 
    void GuiPluginManager::handleButtonCancel()
    {
        Q_EMIT backToNetlist();
    }
 
    void GuiPluginManager::handleLoadExternalPlugin()
    {
        QString filename = QFileDialog::getOpenFileName(this, "Load HAL Plugin", ".", "Shared library files (*.so)");
        if (filename.isEmpty()) return;
        int irowAdded = mGuiPluginTable->addExternalPlugin(filename);
        if (irowAdded >= 0)
            std::cerr << "library file opened <" << filename.toStdString() << ">" << std::endl;
        else
            std::cerr << "failed to load library file <" << filename.toStdString() << ">" << std::endl;
    }
 
 
    void GuiPluginManager::handleToggleGuiContribution(const QString &pluginName)
    {
        GuiPluginEntry::GuiExtensionState newState = GuiPluginEntry::NotAnExtension;
        GuiExtensionInterface* geif = getGuiExtensions().value(pluginName);
        if (geif)
        {
            geif->set_contribution_enabled(!geif->is_contribution_enabled());
            newState = geif->is_contribution_enabled() ? GuiPluginEntry::Enabled : GuiPluginEntry::Disabled;
        }
        mGuiPluginTable->setGuiExtensionState(pluginName, newState);
    }
 
    void GuiPluginManager::handleShowCliOptions(const QString &pluginName, const QString &cliOptions)
    {
        QMessageBox* msg = new QMessageBox(QMessageBox::NoIcon, "CLI Options for "+pluginName, cliOptions);
        msg->setStyleSheet("QLabel{min-width: 800px;}");
        msg->exec();
    }
 
    QString GuiPluginManager::loadIconPath() const
    {
        return mLoadIconPath;
    }
 
    QString GuiPluginManager::loadIconStyle() const
    {
        return mLoadIconStyle;
    }
 
    QString GuiPluginManager::unloadIconPath() const
    {
        return mUnloadIconPath;
    }
 
    QString GuiPluginManager::unloadIconStyle() const
    {
        return mUnloadIconStyle;
    }
 
    QString GuiPluginManager::cliIconPath() const
    {
        return mCliIconPath;
    }
 
    QString GuiPluginManager::cliIconStyle() const
    {
        return mCliIconStyle;
    }
 
    QString GuiPluginManager::guiIconEnabledPath() const
    {
        return mGuiIconEnabledPath;
    }
 
    QString GuiPluginManager::guiIconDisabledPath() const
    {
        return mGuiIconDisabledPath;
    }
 
    QString GuiPluginManager::guiIconEnabledStyle() const
    {
        return mGuiIconEnabledStyle;
    }
 
    QString GuiPluginManager::guiIconDisabledStyle() const
    {
        return mGuiIconDisabledStyle;
    }
 
    QColor GuiPluginManager::defaultTextColor() const
    {
        return mDefaultTextColor;
    }
 
    QColor GuiPluginManager::hilightTextColor() const
    {
        return mHilightTextColor;
    }
 
    QColor GuiPluginManager::hilightBackgroundColor() const
    {
        return mHilightBackgroundColor;
    }
 
    void GuiPluginManager::setLoadIconPath(const QString& s)
    {
        mLoadIconPath = s;
    }
 
    void GuiPluginManager::setLoadIconStyle(const QString& s)
    {
        mLoadIconStyle = s;
    }
 
    void GuiPluginManager::setUnloadIconPath(const QString& s)
    {
        mUnloadIconPath = s;
    }
 
    void GuiPluginManager::setUnloadIconStyle(const QString& s)
    {
        mUnloadIconStyle = s;
    }
 
    void GuiPluginManager::setCliIconPath(const QString& s)
    {
        mCliIconPath = s;
    }
 
    void GuiPluginManager::setCliIconStyle(const QString& s)
    {
        mCliIconStyle = s;
    }
 
    void GuiPluginManager::setGuiIconEnabledPath(const QString& s)
    {
        mGuiIconEnabledPath = s;
    }
 
    void GuiPluginManager::setGuiIconDisabledPath(const QString& s)
    {
        mGuiIconDisabledPath = s;
    }
 
    void GuiPluginManager::setGuiIconEnabledStyle(const QString& s)
    {
        mGuiIconEnabledStyle = s;
    }
 
    void GuiPluginManager::setGuiIconDisabledStyle(const QString& s)
    {
        mGuiIconDisabledStyle = s;
    }
 
    void GuiPluginManager::setDefaultTextColor(QColor& c)
    {
        mDefaultTextColor = c;
    }
 
    void GuiPluginManager::setHilightTextColor(QColor& c)
    {
        mHilightTextColor = c;
    }
 
    void GuiPluginManager::setHilightBackgroundColor(QColor& c)
    {
        mHilightBackgroundColor = c;
    }
 
    void GuiPluginManager::addPluginSubmenus(QMenu* contextMenu, Netlist* netlist,
                                            const std::vector<u32>& modules,
                                            const std::vector<u32>& gates,
                                            const std::vector<u32>& nets)
    {
        bool addedSeparator = false;
 
        QMap<QString,GuiExtensionInterface*> guiExtensionMap = GuiPluginManager::getGuiExtensions();
        for(auto it = guiExtensionMap.constBegin(); it!= guiExtensionMap.constEnd(); ++it)
        {
            GuiExtensionInterface* geif = it.value();
            geif->netlist_loaded(netlist);
 
            if (!geif->is_contribution_enabled())
                continue;
 
            auto contribution = geif->get_context_contribution(netlist, modules, gates, nets);
            if(contribution.size() <= 0)
                continue;
 
            if(!addedSeparator)
            {
                contextMenu->addSeparator();
                contextMenu->addAction("Plugin actions:")->setEnabled(false);
                addedSeparator = true;
            }
 
            QString subMenuEntry = QString::fromStdString(geif->contribution_top_label());
            QMenu *subMenu = contextMenu->addMenu("  " + (subMenuEntry.isEmpty() ? it.key() : subMenuEntry));
            for (ContextMenuContribution cmc : contribution)
            {
                QAction *act = subMenu->addAction(QString::fromStdString(cmc.mEntry));
                connect(act,&QAction::triggered,contextMenu,[cmc, netlist, modules, gates, nets]()
                    {cmc.mContributer->execute_function(cmc.mTagname, netlist, modules, gates, nets);}
                );
            }
        }
    }
 
    //_________________VIEW_______________________________
    GuiPluginView::GuiPluginView(QWidget* parent)
        : QTableView(parent)
    {
        setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
    }
 
    //_________________TABLE______________________________
    GuiPluginTable::GuiPluginTable(GuiPluginManager *parent)
        : QAbstractTableModel(parent), mPluginMgr(parent)
    {
        mWaitForRefresh = true;
        populateTable(false);
        mWaitForRefresh = false;
    }
 
    GuiPluginTable::~GuiPluginTable()
    {
        clearMemory();
    }
 
    void GuiPluginTable::handleRefresh()
    {
        if (mWaitForRefresh) return;
 
        beginResetModel();
        mWaitForRefresh = true;
        clearMemory();
        populateTable(true);
        mWaitForRefresh = false;
        endResetModel();
    }
 
    void GuiPluginTable::populateTable(bool refresh)
    {
        QDir userConfigDir(QString::fromStdString(utils::get_user_config_directory()));
        QMap<QString,GuiPluginEntry*> pluginEntries;
        mSettings = new QSettings(userConfigDir.absoluteFilePath("plugins.ini"),QSettings::IniFormat);
 
        std::set<std::string> loadedPlugins = plugin_manager::get_plugin_names();
 
        int nentry = mSettings->beginReadArray("plugins");
        for (int i=0; i<nentry; i++)
        {
            mSettings->setArrayIndex(i);
            GuiPluginEntry* gpe = new GuiPluginEntry(mSettings);
            pluginEntries.insert(gpe->mName,gpe);
        }
        mSettings->endArray();
 
        for (std::filesystem::path plugDir : utils::get_plugin_directories())
        {
            QDir dir(QString::fromStdString(plugDir.string()));
            if (!dir.exists()) continue;
            for (QFileInfo info : dir.entryInfoList())
            {
                if (!info.isFile()) continue;
                if (!plugin_manager::has_valid_file_extension(info.absoluteFilePath().toStdString())) continue;
 
                QString pluginName = info.baseName();
                GuiPluginEntry* gpe = pluginEntries.value(pluginName);
                bool needUpdate = true;
                if (gpe)
                {
                   needUpdate = gpe->mFileModified != info.lastModified();
                   gpe->setFileFound(true);
                }
                else
                {
                    gpe = new GuiPluginEntry(info);
                    pluginEntries.insert(pluginName,gpe);
                }
 
                BasePluginInterface* bpif = plugin_manager::get_plugin_instance(pluginName.toStdString(), true, true);
                if (bpif && !refresh)
                {
                    // plugin already loaded ?
                    bool alreadyLoaded = loadedPlugins.find(pluginName.toStdString())!=loadedPlugins.end();
                    gpe->updateFromLoaded(bpif, alreadyLoaded);
                    log_debug("gui", "GuiPluginManager: '{}' already loaded.", pluginName.toStdString());
                    continue;
                }
                else if (gpe->requestLoad())
                {
                    // user requested this plugin explicitly in previous session
                    bpif = load(pluginName, info.absoluteFilePath());
                    if (!bpif)
                    {
                        gpe->mLoadState = GuiPluginEntry::NotAPlugin; // however, load failed
                        log_warning("gui", "GuiPluginManager: loading of requested plugin '{}' failed.", pluginName.toStdString());
                    }
                    else
                    {
                        gpe->updateFromLoaded(bpif, true, info.lastModified());
                        log_info("gui", "GuiPluginManager: '{}' loaded upon user request.", pluginName.toStdString());
                    }
                    continue;
                }
 
                if (!needUpdate)
                {
                    log_debug("gui", "GuiPluginManager: '{}' not modified, no update required.", pluginName.toStdString());
                    // known plugin, load only when needed
                    if (gpe->isPlugin())
                        gpe->mLoadState = GuiPluginEntry::NotLoaded;
                    continue;
                }
 
                // plugin updated or not known yet, try dummy load to retrieve information
                bpif = load(pluginName, info.absoluteFilePath());
                if (!bpif)
                {
                    log_warning("gui", "GuiPluginManager: loading of '{}' failed, is it really a HAL plugin?", pluginName.toStdString());
                    gpe->mLoadState = GuiPluginEntry::NotAPlugin;
                    continue;
                }
 
                if (bpif->get_name().empty() || bpif->get_version().empty())
                {
                    log_warning("gui", "GuiPluginManager: '{}' has empty name or version, plugin ignored.", pluginName.toStdString());
                    gpe->mLoadState = GuiPluginEntry::NotAPlugin;
                }
                else
                {
                    log_info("gui", "GuiPluginManager: '{}' loaded to retrieve information about plugin features.", pluginName.toStdString());
                    gpe->updateFromLoaded(bpif, false, info.lastModified());    // load success
                }
            }
        }
 
        // update entry if plugin loaded in meantime as dependency
        for (std::string loadedPluginName:  plugin_manager::get_plugin_names())
        {
            GuiPluginEntry* gpe = pluginEntries.value(QString::fromStdString(loadedPluginName));
            if (!gpe || gpe->isLoaded()) continue;
            BasePluginInterface* bpif = plugin_manager::get_plugin_instance(loadedPluginName,false,true);
            if (!bpif) continue;
            QFileInfo info(gpe->mFilePath);
            gpe->updateFromLoaded(bpif,false,info.exists()?info.lastModified():QDateTime());
        }
 
        mEntries.clear();
        mAvoid.clear();
        mLookup.clear();
        auto it = pluginEntries.begin();
        while (it != pluginEntries.end())
        {
            bool removeEntry = false;
            GuiPluginEntry* gpe = it.value();
            if (gpe->isFileFound())
            {
                if (gpe->isPlugin())
                {
                    mLookup.insert(gpe->mName,mEntries.size());
                    mEntries.append(gpe);
                }
                else
                {
                    mAvoid.append(gpe);
                }
            }
            else if (gpe->mExternalPath.isEmpty() || !gpe->requestLoad() )
            {
                // plugin does no longer exist or no longer required
                removeEntry = true;
            }
            else
            {
                // loaded plugin as binary from user provided path
                QFileInfo info(gpe->mExternalPath);
                if (info.exists() && info.isReadable())
                {
                    mLookup.insert(gpe->mName,mEntries.size());
                    mEntries.append(gpe);
                    BasePluginInterface* bpif = load(gpe->mName, info.absoluteFilePath());
                    if (!bpif)
                    {
                        log_warning("gui", "GuiPluginManager: loading of requested plugin '{}' failed.", gpe->mName.toStdString());
                        removeEntry = true;
                    }
                    else
                    {
                        gpe->updateFromLoaded(bpif, true, info.lastModified());
                        log_info("gui", "GuiPluginManager: '{}' loaded external plugin upon user request.", gpe->mName.toStdString());
                    }
                }
                else
                {
                    removeEntry = true;
                }
            }
            if (removeEntry)
                it = pluginEntries.erase(it);
            else
                ++it;
        }
        persist();
    }
 
    int GuiPluginTable::addExternalPlugin(const QString& path)
    {
        QFileInfo finfo(path);
        GuiPluginEntry* gpe = new GuiPluginEntry(finfo);
        int n = mEntries.size();
        beginInsertRows(QModelIndex(),n,n);
        mLookup.insert(gpe->mName,n);
        mEntries.append(gpe);
        endInsertRows();
        BasePluginInterface* bpif = load(finfo.baseName(),path);
        if (bpif)
        {
            gpe->updateFromLoaded(bpif,true);
            gpe->mExternalPath = path;
            gpe->mLoadState = GuiPluginEntry::UserLoad;
            persist();
        }
        else
        {
            beginRemoveRows(QModelIndex(),n,n);
            gpe = mEntries.takeLast();
            mLookup.remove(gpe->mName);
            endRemoveRows();
            delete gpe;
            n = -1;  // return value : no row was inserted
        }
        return n;
    }
 
 
    void GuiPluginTable::handlePluginLoaded(const QString& pluginName, const QString&)
    {
        if (mWaitForRefresh) return;
        changeState(pluginName,GuiPluginEntry::AutoLoad);
    }
 
    void GuiPluginTable::handlePluginUnloaded(const QString& pluginName, const QString&)
    {
        if (mWaitForRefresh) return;
        changeState(pluginName,GuiPluginEntry::NotLoaded);
    }
 
    void GuiPluginTable::changeState(const QString& pluginName, GuiPluginEntry::LoadState state)
    {
        int irow = mLookup.value(pluginName,-1);
        if (irow < 0 || irow >= mEntries.size()) return;
        GuiPluginEntry* gpe = mEntries.at(irow);
        gpe->mLoadState = state;
        if (state >= GuiPluginEntry::AutoLoad)
        {
            GuiPluginEntry::GuiExtensionState newGuiExtensionState = GuiPluginEntry::NotAnExtension;
            BasePluginInterface* bpif = plugin_manager::get_plugin_instance(pluginName.toStdString());
            if (bpif)
            {
                for (AbstractExtensionInterface* aeif : bpif->get_extensions())
                {
                    GuiExtensionInterface* geif = dynamic_cast<GuiExtensionInterface*>(aeif);
                    if (geif)
                    {
                        newGuiExtensionState = gpe->enforceGuiExtensionState(geif);
                        break;
                    }
                }
            }
            gpe->mGuiExtensionState = newGuiExtensionState;
        }
        Q_EMIT dataChanged(index(irow,0),index(irow,10));
    }
 
    SupportedFileFormats GuiPluginTable::listFacFeature(FacExtensionInterface::Feature ft) const
    {
        SupportedFileFormats retval(ft);
        for (GuiPluginEntry* gpe : mEntries)
        {
            if (gpe->mFeature != ft) continue;
            for (QString arg : gpe->mFeatureArguments)
            {
                retval.insert(arg,gpe->mDescription);
            }
        }
        return retval;
    }
 
    QString SupportedFileFormats::toFileDialog(bool addHalFormat) const
    {
        QMap<QString,QString> pluginMap = *this; // might want to add hal format temporarily
        if (addHalFormat)
            pluginMap.insert(".hal", "HAL progress files ");
 
        QString reStr = "(.*)";
        if (mFeature == FacExtensionInterface::FacGatelibParser || mFeature == FacExtensionInterface::FacNetlistParser)
            reStr = "Default (.*) Parser";
        else if (mFeature == FacExtensionInterface::FacGatelibWriter || mFeature == FacExtensionInterface::FacNetlistWriter)
            reStr = "Default (.*) Writer";
        QRegExp re(reStr, Qt::CaseInsensitive);
 
        QString retval;
 
        if (pluginMap.size() > 1)
        {
            for (const QString& ext: pluginMap.keys())
            {
                if (!retval.isEmpty()) retval += " ";
                retval += "*" + ext;
            }
            retval+= ")";
            retval.prepend("All supported files (");
        }
        QMap<QString,QString> formatMap;
        for (auto it = pluginMap.constBegin(); it != pluginMap.constEnd(); ++it)
        {
            QString label = it.value();
            QString fileFmt = (re.indexIn(label) < 0)
                    ? label.remove(QChar(':'))
                    : re.cap(1) + QString(" files ");
            if (formatMap.contains(fileFmt))
                formatMap[fileFmt] += " *" + it.key();
            else
                formatMap[fileFmt] = "*" + it.key();
        }
        for (auto it = formatMap.constBegin(); it != formatMap.constEnd(); ++it)
        {
            if (!retval.isEmpty()) retval += ";;";
            retval += it.key() + "(" + it.value() + ")";
        }
        return retval;
    }
 
    void GuiPluginTable::loadFeature(FacExtensionInterface::Feature ft, const QString& extension)
    {
        for (GuiPluginEntry* gpe : mEntries)
        {
            if (gpe->isLoaded() || gpe->mFeature != ft) continue;
            if (!extension.isEmpty())
            {
                bool extensionFound = false;
                for (QString arg : gpe->mFeatureArguments)
                {
                    if (arg==extension)
                    {
                        extensionFound = true;
                        break;
                    }
                }
                if (!extensionFound) continue;
            }
            BasePluginInterface* bpif = load(gpe->mName, gpe->mFilePath);
            if (bpif) gpe->updateFromLoaded(bpif,false);
        }
    }
 
    BasePluginInterface* GuiPluginTable::load(const QString& pluginName, const QString& path) const
    {        
        std::string pnam = pluginName.toStdString();
        if (!plugin_manager::load(pnam,path.toStdString()))
        {
            log_warning("gui", "Error loading plugin '{}' from location '{}'",
                        pnam,path.toStdString());
            return nullptr;
        }
        return plugin_manager::get_plugin_instance(pnam);
    }
 
    void GuiPluginTable::persist()
    {
        mSettings->clear();
        mSettings->beginWriteArray("plugins");
        int inx = 0;
 
        for (GuiPluginEntry* gpe : mEntries)
        {
            mSettings->setArrayIndex(inx++);
            gpe->persist(mSettings);
        }
        for (GuiPluginEntry* gpe : mAvoid)
        {
            mSettings->setArrayIndex(inx++);
            gpe->persist(mSettings);
        }
        mSettings->endArray();
        mSettings->sync();
    }
 
    QMap<QString,GuiExtensionInterface*> GuiPluginManager::getGuiExtensions()
    {
        QMap<QString,GuiExtensionInterface*> retval;
        for (const std::string& pluginName : plugin_manager::get_plugin_names())
        {
            BasePluginInterface* bpif = plugin_manager::get_plugin_instance(pluginName);
            if (!bpif) continue;
            for (AbstractExtensionInterface* aeif : bpif->get_extensions())
            {
                GuiExtensionInterface* geif = dynamic_cast<GuiExtensionInterface*>(aeif);
                if (geif) retval.insert(QString::fromStdString(pluginName),geif);
            }
        }
        return retval;
    }
 
    void GuiPluginTable::clearMemory()
    {
 
        for (GuiPluginEntry* entry : mEntries)
            delete entry;
 
        mEntries.clear();
        mAvoid.clear();
        mLookup.clear();
        mSettings->deleteLater();
        mSettings = nullptr;
    }
 
    int GuiPluginTable::rowCount(const QModelIndex&) const
    {
        return mEntries.size();
    }
 
    int GuiPluginTable::columnCount(const QModelIndex&) const
    {
        return 11;
    }
 
    QVariant GuiPluginTable::headerData(int section, Qt::Orientation orientation, int role) const
    {
        if(role == Qt::DisplayRole && orientation == Qt::Horizontal)
        {
            switch(section)
            {
            case 0: return "Name";
            case 1: return "Description";
            case 2: return "Filename";
            case 3: return "Timestamp";
            case 4: return "Dependencies";
            case 5: return "Category";
            case 6: return "Extensions";
            case 7: return "GUI";
            case 8: return "CLI";
            case 9: return "State";
            case 10: return QString();
            default: return QVariant();
            }
        }
        return QAbstractTableModel::headerData(section,orientation,role);
    }
 
    GuiPluginEntry* GuiPluginTable::at(int irow) const
    {
        return mEntries.at(irow);
    }
 
    void GuiPluginTable::handleButtonPressed(const QModelIndex& buttonIndex)
    {
        if (mWaitForRefresh) return;
 
        int irow = buttonIndex.row();
        if (irow >= mEntries.size()) return;
        GuiPluginEntry* gpe = mEntries.at(irow);
        switch (buttonIndex.column())
        {
        case 7:
            if (gpe->mName == "hal_gui") return;
            if (gpe->isLoaded())
                Q_EMIT toggleEnableGuiContribution(gpe->mName);
            return;
        case 8:
            if (!gpe->mCliOptions.isEmpty())
                Q_EMIT showCliOptions(gpe->mName, gpe->mCliOptions);
            return;
        }
        if (gpe->mName == "hal_gui") return;
 
        bool success = false;
        if (gpe->isLoaded())
        {
            QStringList need = neededBy(gpe->mName);
            if (need.isEmpty())
            {
                success = plugin_manager::unload(gpe->mName.toStdString());
                if (success)
                    gpe->mLoadState = GuiPluginEntry::NotLoaded;
                else
                    QMessageBox::warning(qApp->activeWindow(),"Unload failed",
                                         QString("Unload of plugin %1\nrefused by plugin_manager")
                                         .arg(gpe->mName));
            }
            else
            {
                QMessageBox::warning(qApp->activeWindow(),"Unload failed",
                                     QString("Cannot unload plugin %1\nwhich is required by %2")
                                     .arg(gpe->mName).arg(need.join(',')));
            }
        }
        else
        {
            if (plugin_manager::load(gpe->mName.toStdString(),gpe->mFilePath.toStdString()))
            {
                success = true;
                gpe->mLoadState = GuiPluginEntry::UserLoad;
            }
            else
                QMessageBox::warning(qApp->activeWindow(),"Load failed",
                                     QString("Could not load plugin %1\nplease check plugin_manager log")
                                     .arg(gpe->mName));
        }
        if (success)
        {
            Q_EMIT dataChanged(index(irow,0),index(irow,columnCount()-1));
            persist();
        }
    }
 
    QVariant GuiPluginTable::data(const QModelIndex &index, int role) const
    {
        switch (role)
        {
        case Qt::ForegroundRole:
            if (mEntries.at(index.row())->isLoaded())
                return mPluginMgr->hilightTextColor();
            return mPluginMgr->defaultTextColor();
        case Qt::BackgroundRole:
            if (mEntries.at(index.row())->isLoaded())
                return mPluginMgr->hilightBackgroundColor();
            return QBrush();
        case Qt::DisplayRole:
            break; // handle below
        default:
            return QVariant();
        }
 
        QVariant v = mEntries.at(index.row())->data(index.column());
        if (index.column() >= 7 && index.column() <= 8)
            return (v.toBool() ? "X" : " ");
        return v;
    }
 
    bool GuiPluginTable::isHalGui(const QModelIndex &index) const
    {
        if (index.row() >= mEntries.size()) return false;
        return mEntries.at(index.row())->mName == "hal_gui";
    }
 
    GuiPluginEntry::GuiExtensionState GuiPluginTable::guiExtensionState(const QModelIndex& index) const
    {
        if (index.row() >= mEntries.size()) return GuiPluginEntry::Unknown;
        return mEntries.at(index.row())->mGuiExtensionState;
    }
 
    void GuiPluginTable::setGuiExtensionState(const QString& pluginName, GuiPluginEntry::GuiExtensionState state)
    {
        int irow = mLookup.value(pluginName,-1);
        if (irow < 0 || irow >= mEntries.size()) return;
        mEntries.at(irow)->mGuiExtensionState = state;
        persist();
    }
 
    bool GuiPluginTable::hasCliExtension(const QModelIndex& index) const
    {
        if (index.row() >= mEntries.size()) return false;
        return !mEntries.at(index.row())->mCliOptions.isEmpty();
    }
 
    bool GuiPluginTable::isLoaded(const QModelIndex &index) const
    {
        if (index.row() >= mEntries.size()) return false;
        return mEntries.at(index.row())->isLoaded();
    }
 
    QStringList GuiPluginTable::neededBy(const QString &pluginName)
    {
        QStringList retval;
        for (GuiPluginEntry* gpe : mEntries)
        {
            if (gpe->mName == pluginName) continue;
            for (QString dep : gpe->mDependencies)
                if (dep == pluginName)
                {
                    // dependency found, check if loaded
                    if (gpe->isLoaded())
                        retval.append(gpe->mName);
                }
        }
        return retval;
    }
 
    //------------------------------------------------------------
 
    GuiPluginEntry::GuiPluginEntry(const QFileInfo& info)
        : mLoadState(NotAPlugin), mName(info.baseName()),
          mFilePath(info.absoluteFilePath()),
          mFileModified(info.lastModified()),
          mFeature(FacExtensionInterface::FacUnknown),
          mUserInterface(false),
          mGuiExtensionState(Unknown),
          mFileFound(true)
    {;}
 
    QVariant GuiPluginEntry::data(int icol) const
    {
        switch (icol)
        {
        case 0: return mName;
        case 1: return mDescription;
        case 2: return QFileInfo(mFilePath).fileName();
        case 3: return mFileModified.toString("dd.MM.yy hh:mm");
        case 4: return mDependencies.join(' ');
        case 5:
        {
            switch (mFeature)
            {
            case FacExtensionInterface::FacNetlistParser: return "Netlist parser";
            case FacExtensionInterface::FacNetlistWriter: return "Netlist writer";
            case FacExtensionInterface::FacGatelibParser: return "Gate library parser";
            case FacExtensionInterface::FacGatelibWriter: return "Gate library writer";
            default: break;
            }
            if (mUserInterface) return "HAL user interface";
            return "Other HAL plugin";
        }
        case 6: return mFeatureArguments.join(' ');
        case 7: return mGuiExtensionState;
        case 8: return mCliOptions;
        case 9: if (!isLoaded()) return "-";
                else if (mExternalPath.isEmpty()) return "LOADED";
                else return "EXTERN";
        case 10: return (int) mLoadState;
        }
        return QVariant();
    }
 
    GuiPluginEntry::GuiExtensionState GuiPluginEntry::enforceGuiExtensionState(GuiExtensionInterface* geif) const
    {
        if (!geif) return NotAnExtension;
 
        switch (mGuiExtensionState) // enforce user setting
        {
        case Disabled:
            geif->set_contribution_enabled(false);
            break;
        case Enabled:
            geif->set_contribution_enabled(true);
            break;
        default:
            break;
        }
        return (geif->is_contribution_enabled() ? Enabled : Disabled);
    }
 
 
    void GuiPluginEntry::persist(QSettings* settings) const
    {
        settings->setValue("state", (int) mLoadState);
        settings->setValue("name", mName);
        settings->setValue("version", mVersion);
        settings->setValue("description", mDescription);
        settings->setValue("file_modified", mFileModified);
        settings->setValue("dependencies", mDependencies);
        settings->setValue("feature_code", (int) mFeature);
        settings->setValue("feature_args", mFeatureArguments);
        settings->setValue("user_interface", mUserInterface);
        settings->setValue("gui_extension_state", (int) mGuiExtensionState);
        settings->setValue("cli_options", mCliOptions);
        settings->setValue("ext_path", mExternalPath);
    }
 
    GuiPluginEntry::GuiPluginEntry(const QSettings *settings)
        : mFileFound(false)
    {
        mLoadState    = (LoadState) settings->value("state").toInt();
        mName               = settings->value("name").toString();
        mVersion            = settings->value("version").toString();
        mDescription        = settings->value("description").toString();
        mFileModified       = settings->value("file_modified").toDateTime();
        mDependencies       = settings->value("dependencies").toStringList();
        mFeature = (FacExtensionInterface::Feature) settings->value("feature_code").toInt();
        mFeatureArguments   = settings->value("feature_args").toStringList();
        mUserInterface      = settings->value("user_interface").toBool();
        mGuiExtensionState = (GuiExtensionState) settings->value("gui_extension_state").toInt();
        mCliOptions         = settings->value("cli_options").toString();
        mExternalPath       = settings->value("ext_path").toString();
        mFilePath = QString::fromStdString(plugin_manager::get_plugin_path(mName.toStdString()).string());
    }
 
    void GuiPluginEntry::updateFromLoaded(const BasePluginInterface *bpif, bool isUser, const QDateTime& modified)
    {
        mLoadState   = isUser ? UserLoad : AutoLoad;
        QString desc = QString::fromStdString(bpif->get_name());
        if (desc != mName) mDescription = desc;
        if (!bpif->get_description().empty()) mDescription = QString::fromStdString(bpif->get_description());
        mVersion = QString::fromStdString(bpif->get_version());
        mDependencies.clear();
        for (std::string dep : bpif->get_dependencies())
             mDependencies.append(QString::fromStdString(dep));
        mFeatureArguments.clear();
        for (plugin_manager::PluginFeature feature : plugin_manager::get_plugin_features(bpif->get_name()))
        {
            mDescription = QString::fromStdString(feature.description);
            mFeature = feature.feature;
            mFeatureArguments.clear();
            for (std::string arg : feature.args)
                mFeatureArguments.append(QString::fromStdString(arg));
        }
        mCliOptions.clear();
 
        GuiExtensionState newGuiExtensionState = Unknown; // not initialized
        for (AbstractExtensionInterface* aeif : bpif->get_extensions())
        {
            CliExtensionInterface* ceif = nullptr;
            GuiExtensionInterface* geif = nullptr;
            if (geif = dynamic_cast<GuiExtensionInterface*>(aeif))
            {
                mGuiExtensionState = newGuiExtensionState = enforceGuiExtensionState(geif);
            }
            else if ((ceif=dynamic_cast<CliExtensionInterface*>(aeif)))
                mCliOptions = QString::fromStdString(ceif->get_cli_options().get_options_string());
        }
        if (!newGuiExtensionState) mGuiExtensionState = NotAnExtension; // no GUI extension
 
        mUserInterface = (dynamic_cast<const UIPluginInterface*>(bpif) != nullptr);
        if (modified.isValid()) mFileModified = modified;
    }
 
    //------------------------------------------------
    GuiPluginDelegate::GuiPluginDelegate(QObject *parent)
        : QItemDelegate(parent)
    {
 //       int bgBright[3] = {26, 46, 80};
        for (int i=0; i<3; i++)
        {
            mTemplateButton[i] = new QPushButton;
//            mTemplateButton[i]->setStyleSheet(QString("background-color : rgb(%1,%1,%1)").arg(bgBright[i]));
        }
 
    }
 
    void GuiPluginDelegate::updateQss(GuiPluginManager *gpm)
    {
        mIconLoad = gui_utility::getStyledSvgIcon(gpm->loadIconStyle(),gpm->loadIconPath());
        mIconUnload = gui_utility::getStyledSvgIcon(gpm->unloadIconStyle(), gpm->unloadIconPath());
        mIconCliOptions = gui_utility::getStyledSvgIcon(gpm->cliIconStyle(), gpm->cliIconPath());
        mIconEnableGuiContribution = gui_utility::getStyledSvgIcon(gpm->guiIconEnabledStyle(), gpm->guiIconEnabledPath());
        mIconDisableGuiContribution = gui_utility::getStyledSvgIcon(gpm->guiIconDisabledStyle(), gpm->guiIconDisabledPath());
    }
 
    GuiPluginDelegate::~GuiPluginDelegate()
    {
        for (int i=0; i<3; i++)
            delete mTemplateButton[i];
    }
 
    void GuiPluginDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
    {
        const int w = 28;
        const GuiPluginTable* plt = dynamic_cast<const GuiPluginTable*>(index.model());
        if (!plt) return;
        QStyleOptionButton button;
        bool drawIcon = true;
        GuiPluginEntry::GuiExtensionState iconState = GuiPluginEntry::Unknown;
        switch (index.column())
        {
        case 7:
            button.iconSize = QSize(w-4,w-4);
            iconState = plt->guiExtensionState(index);
 
            if (!iconState)
            {
                QString pluginName = plt->at(index.row())->name();
                GuiExtensionInterface* geif = GuiPluginManager::getGuiExtensions().value(pluginName);
                if (!plt->isLoaded(index))
                    iconState = GuiPluginEntry::Unknown;
                else if (!geif)
                    iconState = GuiPluginEntry::NotAnExtension;
                else if (geif->is_contribution_enabled())
                    iconState = GuiPluginEntry::Enabled;
                else
                    iconState = GuiPluginEntry::Disabled;
            }
 
            switch (iconState)
            {
            case GuiPluginEntry::Unknown:
            {
                drawIcon = false;
                break;
            }
            case GuiPluginEntry::NotAnExtension:
                drawIcon = false;
                break;
            case GuiPluginEntry::Disabled:
                button.icon = mIconDisableGuiContribution;
                break;
            case GuiPluginEntry::Enabled:
                button.icon = mIconEnableGuiContribution;
                break;
            }
            break;
        case 8:
            button.iconSize = QSize(w-4,w-4);
            if (plt->hasCliExtension(index))
                button.icon = mIconCliOptions;
            else
                drawIcon = false;
            break;
        case 10:
            if (plt->isHalGui(index))
                drawIcon = false;
            else
            {
                if (plt->isLoaded(index))
                    button.icon = mIconUnload;
                else
                    button.icon = mIconLoad;
                button.iconSize = QSize(w-12,w-12);
            }
            break;
        default:
            drawIcon = false;
            break;
        }
 
        State stat = Normal;
        QColor bgColor = plt->data(index,Qt::BackgroundRole).value<QColor>();
        if (mMouseIndex.isValid() && mMouseIndex == index)
        {
            stat = Pressed;
            bgColor = Qt::red;
        }
 
        QRect r = option.rect;
        int x = r.left() + r.width() - w;
        int y = r.top();
        int h = w;
        button.rect = QRect(x,y,w,h);
        button.state = (stat!=Pressed) ? QStyle::State_Enabled | QStyle::State_Raised : QStyle::State_Enabled | QStyle::State_Sunken | QStyle::State_MouseOver;
 
        if (bgColor.isValid())
            painter->fillRect(r,QBrush(bgColor));
        if (drawIcon)
            QApplication::style()->drawControl( QStyle::CE_PushButton, &button, painter, mTemplateButton[stat]);
    }
 
    QSize GuiPluginDelegate::sizeHint(const QStyleOptionViewItem&, const QModelIndex&) const
    {
        return QSize(30,30);
    }
 
    bool GuiPluginDelegate::editorEvent(QEvent* event, QAbstractItemModel*, const QStyleOptionViewItem&, const QModelIndex& index)
    {
        QMouseEvent* mev = dynamic_cast<QMouseEvent*>(event);
        if (!mev) return false;
        switch (mev->type())
        {
        case QEvent::MouseButtonPress:
            mMousePos = mev->pos();
            mMouseIndex = index;
            return true;
        case QEvent::MouseButtonRelease:
            if ((mMousePos - mev->pos()).manhattanLength()<4)
            {
                Q_EMIT buttonPressed(index);
            }
            mMousePos = QPoint();
            mMouseIndex = QModelIndex();
            return true;
        default:
            break;
        }
        return false;
    }
}