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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
#include "cppsemanticinfoupdater.h"
#include "cpplocalsymbols.h"
#include "cppmodelmanager.h"
#include <utils/qtcassert.h>
#include <utils/runextensions.h>
#include <cplusplus/Control.h>
#include <cplusplus/CppDocument.h>
#include <cplusplus/TranslationUnit.h>
#include <QLoggingCategory>
enum { debug = 0 };
using namespace CPlusPlus;
static Q_LOGGING_CATEGORY(log, "qtc.cppeditor.semanticinfoupdater", QtWarningMsg)
namespace CppEditor {
class SemanticInfoUpdaterPrivate
{
public:
class FuturizedTopLevelDeclarationProcessor: public TopLevelDeclarationProcessor
{
public:
explicit FuturizedTopLevelDeclarationProcessor(QFutureInterface<void> &future): m_future(future) {}
bool processDeclaration(DeclarationAST *) override { return !isCanceled(); }
bool isCanceled() { return m_future.isCanceled(); }
private:
QFutureInterface<void> m_future;
};
public:
explicit SemanticInfoUpdaterPrivate(SemanticInfoUpdater *q);
~SemanticInfoUpdaterPrivate();
SemanticInfo semanticInfo() const;
void setSemanticInfo(const SemanticInfo &semanticInfo, bool emitSignal);
SemanticInfo update(const SemanticInfo::Source &source,
bool emitSignalWhenFinished,
FuturizedTopLevelDeclarationProcessor *processor);
bool reuseCurrentSemanticInfo(const SemanticInfo::Source &source, bool emitSignalWhenFinished);
void update_helper(QFutureInterface<void> &future, const SemanticInfo::Source &source);
public:
SemanticInfoUpdater *q;
mutable QMutex m_lock;
SemanticInfo m_semanticInfo;
QFuture<void> m_future;
};
SemanticInfoUpdaterPrivate::SemanticInfoUpdaterPrivate(SemanticInfoUpdater *q)
: q(q)
{
}
SemanticInfoUpdaterPrivate::~SemanticInfoUpdaterPrivate()
{
m_future.cancel();
m_future.waitForFinished();
}
SemanticInfo SemanticInfoUpdaterPrivate::semanticInfo() const
{
QMutexLocker locker(&m_lock);
return m_semanticInfo;
}
void SemanticInfoUpdaterPrivate::setSemanticInfo(const SemanticInfo &semanticInfo, bool emitSignal)
{
{
QMutexLocker locker(&m_lock);
m_semanticInfo = semanticInfo;
}
if (emitSignal) {
qCDebug(log) << "emiting new info";
emit q->updated(semanticInfo);
}
}
SemanticInfo SemanticInfoUpdaterPrivate::update(const SemanticInfo::Source &source,
bool emitSignalWhenFinished,
FuturizedTopLevelDeclarationProcessor *processor)
{
SemanticInfo newSemanticInfo;
newSemanticInfo.revision = source.revision;
newSemanticInfo.snapshot = source.snapshot;
Document::Ptr doc = newSemanticInfo.snapshot.preprocessedDocument(source.code,
Utils::FilePath::fromString(source.fileName));
if (processor)
doc->control()->setTopLevelDeclarationProcessor(processor);
doc->check();
if (processor && processor->isCanceled())
newSemanticInfo.complete = false;
newSemanticInfo.doc = doc;
qCDebug(log) << "update() for source revision:" << source.revision
<< "canceled:" << !newSemanticInfo.complete;
setSemanticInfo(newSemanticInfo, emitSignalWhenFinished);
return newSemanticInfo;
}
bool SemanticInfoUpdaterPrivate::reuseCurrentSemanticInfo(const SemanticInfo::Source &source,
bool emitSignalWhenFinished)
{
const SemanticInfo currentSemanticInfo = semanticInfo();
if (!source.force
&& currentSemanticInfo.complete
&& currentSemanticInfo.revision == source.revision
&& currentSemanticInfo.doc
&& currentSemanticInfo.doc->translationUnit()->ast()
&& currentSemanticInfo.doc->filePath().toString() == source.fileName
&& !currentSemanticInfo.snapshot.isEmpty()
&& currentSemanticInfo.snapshot == source.snapshot) {
SemanticInfo newSemanticInfo;
newSemanticInfo.revision = source.revision;
newSemanticInfo.snapshot = source.snapshot;
newSemanticInfo.doc = currentSemanticInfo.doc;
setSemanticInfo(newSemanticInfo, emitSignalWhenFinished);
qCDebug(log) << "re-using current semantic info, source revision:" << source.revision;
return true;
}
return false;
}
void SemanticInfoUpdaterPrivate::update_helper(QFutureInterface<void> &future,
const SemanticInfo::Source &source)
{
FuturizedTopLevelDeclarationProcessor processor(future);
update(source, true, &processor);
}
SemanticInfoUpdater::SemanticInfoUpdater()
: d(new SemanticInfoUpdaterPrivate(this))
{
}
SemanticInfoUpdater::~SemanticInfoUpdater()
{
d->m_future.cancel();
d->m_future.waitForFinished();
}
SemanticInfo SemanticInfoUpdater::update(const SemanticInfo::Source &source)
{
qCDebug(log) << "update() - synchronous";
d->m_future.cancel();
const bool emitSignalWhenFinished = false;
if (d->reuseCurrentSemanticInfo(source, emitSignalWhenFinished)) {
d->m_future = QFuture<void>();
return semanticInfo();
}
return d->update(source, emitSignalWhenFinished, nullptr);
}
void SemanticInfoUpdater::updateDetached(const SemanticInfo::Source &source)
{
qCDebug(log) << "updateDetached() - asynchronous";
d->m_future.cancel();
const bool emitSignalWhenFinished = true;
if (d->reuseCurrentSemanticInfo(source, emitSignalWhenFinished)) {
d->m_future = QFuture<void>();
return;
}
d->m_future = Utils::runAsync(CppModelManager::instance()->sharedThreadPool(),
&SemanticInfoUpdaterPrivate::update_helper, d.data(), source);
}
SemanticInfo SemanticInfoUpdater::semanticInfo() const
{
return d->semanticInfo();
}
} // namespace CppEditor
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