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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#pragma once
#include <QObject>
#include <QPointer>
#include <QList>
#include <QDir>
#include <QStandardItem>
QT_BEGIN_NAMESPACE
class QString;
class QAbstractItemModel;
QT_END_NAMESPACE
namespace QmlDesigner {
class IWidgetPlugin;
namespace Internal {
// Dumb plugin data structure. Note that whereas QObjects can
// casted to an interface, QPointer does not work with the
// interface class, so, we need a separate QPointer as a guard
// to detect the deletion of a plugin instance which can happen
// in theory.
struct WidgetPluginData {
WidgetPluginData(const QString &p = QString());
QString path;
bool failed;
QString errorMessage;
QPointer<QObject> instanceGuard;
IWidgetPlugin *instance;
};
// PluginPath: Manages a plugin directory. It does nothing
// on construction following the "as lazy as possible" principle.
// In the "loaded" stage, it scans the directories and creates
// a list of PluginData for the libraries found.
// getInstances() will return the fully initialized list of
// IPlugins.
class WidgetPluginPath {
using IWidgetPluginList = QList<IWidgetPlugin *>;
public:
explicit WidgetPluginPath(const QDir &path);
void getInstances(IWidgetPluginList *list);
QDir path() const { return m_path; }
// Convenience to populate a "About Plugin" dialog with
// plugins from that path. Forces initialization.
QStandardItem *createModelItem();
private:
using PluginDataList = QList<WidgetPluginData>;
static QStringList libraryFilePaths(const QDir &dir);
void clear();
void ensureLoaded();
QDir m_path;
bool m_loaded;
PluginDataList m_plugins;
};
} // namespace Internal
} // namespace QmlDesigner
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