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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include "filecache.h"
#include <utils/fileutils.h>
#include <utils/optional.h>
#include <utils/synchronousprocess.h>
#include <utils/variant.h>
#include <QFuture>
#include <QMutex>
#include <QThread>
#include <memory>
QT_BEGIN_NAMESPACE
class QProcess;
QT_END_NAMESPACE
namespace Haskell {
namespace Internal {
class Error {
public:
enum class Type {
FailedToStartStack,
Other // TODO get rid of it
};
Type type;
QString details;
};
class SymbolInfo {
public:
QStringList definition;
QStringList additionalInfo;
Utils::FileName file;
int line = -1;
int col = -1;
QString module;
};
using QByteArrayOrError = Utils::variant<QByteArray, Error>;
using QStringOrError = Utils::variant<QString, Error>;
using SymbolInfoOrError = Utils::variant<SymbolInfo, Error>;
template <typename T> class ghcmod_deleter;
template <> class ghcmod_deleter<QProcess>
{
public:
void operator()(QProcess *p) { Utils::SynchronousProcess::stopProcess(*p); delete p; }
};
using unique_ghcmod_process = std::unique_ptr<QProcess, ghcmod_deleter<QProcess>>;
class GhcMod
{
public:
GhcMod(const Utils::FileName &path);
~GhcMod();
Utils::FileName basePath() const;
void setFileMap(const QHash<Utils::FileName, Utils::FileName> &fileMap);
SymbolInfoOrError findSymbol(const Utils::FileName &filePath, const QString &symbol);
QStringOrError typeInfo(const Utils::FileName &filePath, int line, int col);
QByteArrayOrError runQuery(const QString &query);
QByteArrayOrError runFindSymbol(const Utils::FileName &filePath, const QString &symbol);
QByteArrayOrError runTypeInfo(const Utils::FileName &filePath, int line, int col);
static SymbolInfoOrError parseFindSymbol(const QByteArrayOrError &response);
static QStringOrError parseTypeInfo(const QByteArrayOrError &response);
static void setStackExecutable(const Utils::FileName &filePath);
private:
Utils::optional<Error> ensureStarted();
void shutdown();
void log(const QString &message);
static Utils::FileName m_stackExecutable;
static QMutex m_mutex;
Utils::FileName m_path;
unique_ghcmod_process m_process; // kills process on reset
QHash<Utils::FileName, Utils::FileName> m_fileMap;
};
class AsyncGhcMod : public QObject
{
Q_OBJECT
public:
struct Operation {
Operation() = default;
Operation(const std::function<QByteArrayOrError()> &op);
mutable QFutureInterface<QByteArrayOrError> fi;
std::function<QByteArrayOrError()> op;
};
AsyncGhcMod(const Utils::FileName &path);
~AsyncGhcMod();
Utils::FileName basePath() const;
QFuture<SymbolInfoOrError> findSymbol(const Utils::FileName &filePath, const QString &symbol);
QFuture<QStringOrError> typeInfo(const Utils::FileName &filePath, int line, int col);
private slots:
void updateCache(); // called through QMetaObject::invokeMethod
private:
void reduceQueue();
QThread m_thread;
QObject m_threadTarget; // used to run methods in m_thread
GhcMod m_ghcmod; // only use in m_thread
FileCache m_fileCache; // only update through reduceQueue
QVector<Operation> m_queue;
QMutex m_mutex;
};
} // Internal
} // Haskell
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