qmlprofilerdetailsrewriter.cpp 6.82 KB
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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** 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.
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**
** GNU Lesser General Public License Usage
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** 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
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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****************************************************************************/
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#include "qmlprofilerdetailsrewriter.h"

#include <qmljs/parser/qmljsast_p.h>
#include <qmljs/qmljsmodelmanagerinterface.h>
#include <qmljstools/qmljsmodelmanager.h>

#include <utils/qtcassert.h>

namespace QmlProfiler {
namespace Internal {

struct PendingEvent {
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    QmlDebug::QmlEventLocation location;
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    QString localFile;
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    int requestId;
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};

class PropertyVisitor: protected QmlJS::AST::Visitor
{
    QmlJS::AST::Node * _lastValidNode;
    unsigned _line;
    unsigned _col;
public:
    QmlJS::AST::Node * operator()(QmlJS::AST::Node *node, unsigned line, unsigned col)
    {
        _line = line;
        _col = col;
        _lastValidNode = 0;
        accept(node);
        return _lastValidNode;
    }

protected:
    using QmlJS::AST::Visitor::visit;

    void accept(QmlJS::AST::Node *node)
    {
        if (node)
            node->accept(this);
    }

    bool containsLocation(QmlJS::AST::SourceLocation start, QmlJS::AST::SourceLocation end)
    {
        return (_line > start.startLine || (_line == start.startLine && _col >= start.startColumn)) &&
                (_line < end.startLine || (_line == end.startLine && _col <= end.startColumn));
    }


    virtual bool preVisit(QmlJS::AST::Node *node)
    {
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        if (QmlJS::AST::cast<QmlJS::AST::UiQualifiedId *>(node))
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            return false;
        return containsLocation(node->firstSourceLocation(), node->lastSourceLocation());
    }

    virtual bool visit(QmlJS::AST::UiScriptBinding *ast)
    {
        _lastValidNode = ast;
        return true;
    }

    virtual bool visit(QmlJS::AST::UiPublicMember *ast)
    {
        _lastValidNode = ast;
        return true;
    }
};

/////////////////////////////////////////////////////////////////////////////////

class QmlProfilerDetailsRewriter::QmlProfilerDetailsRewriterPrivate
{
public:
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    QmlProfilerDetailsRewriterPrivate(QmlProfilerDetailsRewriter *qq,
                                      Utils::FileInProjectFinder *fileFinder)
                                      : m_projectFinder(fileFinder), q(qq) {}
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    ~QmlProfilerDetailsRewriterPrivate() {}

    QList <PendingEvent> m_pendingEvents;
    QStringList m_pendingDocs;
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    Utils::FileInProjectFinder *m_projectFinder;
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    QmlProfilerDetailsRewriter *q;
};

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QmlProfilerDetailsRewriter::QmlProfilerDetailsRewriter(
        QObject *parent, Utils::FileInProjectFinder *fileFinder)
    : QObject(parent), d(new QmlProfilerDetailsRewriterPrivate(this, fileFinder))
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{ }

QmlProfilerDetailsRewriter::~QmlProfilerDetailsRewriter()
{
    delete d;
}

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void QmlProfilerDetailsRewriter::requestDetailsForLocation(int requestId,
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        const QmlDebug::QmlEventLocation &location)
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{
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    const QString localFile = d->m_projectFinder->findFile(location.filename);
    QFileInfo fileInfo(localFile);
    if (!fileInfo.exists() || !fileInfo.isReadable())
        return;
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    if (!QmlJS::Document::isQmlLikeLanguage(QmlJS::ModelManagerInterface::guessLanguageOfFile(localFile)))
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        return;

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    PendingEvent ev = {location, localFile, requestId};
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    d->m_pendingEvents << ev;
    if (!d->m_pendingDocs.contains(localFile)) {
        if (d->m_pendingDocs.isEmpty())
            connect(QmlJS::ModelManagerInterface::instance(),
                    SIGNAL(documentUpdated(QmlJS::Document::Ptr)),
                    this,
                    SLOT(documentReady(QmlJS::Document::Ptr)));

        d->m_pendingDocs << localFile;
    }
}

void QmlProfilerDetailsRewriter::reloadDocuments()
{
    if (!d->m_pendingDocs.isEmpty())
        QmlJS::ModelManagerInterface::instance()->updateSourceFiles(d->m_pendingDocs, false);
    else
        emit eventDetailsChanged();
}

void QmlProfilerDetailsRewriter::rewriteDetailsForLocation(QTextStream &textDoc,
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        QmlJS::Document::Ptr doc, int requestId, const QmlDebug::QmlEventLocation &location)
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{
    PropertyVisitor propertyVisitor;
    QmlJS::AST::Node *node = propertyVisitor(doc->ast(), location.line, location.column);

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    if (!node)
        return;
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    qint64 startPos = node->firstSourceLocation().begin();
    qint64 len = node->lastSourceLocation().end() - startPos;

    textDoc.seek(startPos);
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    QString details = textDoc.read(len).replace(QLatin1Char('\n'), QLatin1Char(' ')).simplified();
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    emit rewriteDetailsString(requestId, details);
}

void QmlProfilerDetailsRewriter::clearRequests()
{
    d->m_pendingDocs.clear();
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}

void QmlProfilerDetailsRewriter::documentReady(QmlJS::Document::Ptr doc)
{
    // this could be triggered by an unrelated reload in Creator
    if (!d->m_pendingDocs.contains(doc->fileName()))
        return;

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    // if the file could not be opened this slot is still triggered but source will be an empty string
    QString source = doc->source();
    if (!source.isEmpty()) {
        QTextStream st(&source, QIODevice::ReadOnly);
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        for (int i = d->m_pendingEvents.count()-1; i>=0; i--) {
            PendingEvent ev = d->m_pendingEvents[i];
            if (ev.localFile == doc->fileName()) {
                d->m_pendingEvents.removeAt(i);
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                rewriteDetailsForLocation(st, doc, ev.requestId, ev.location);
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            }
        }
    }

    d->m_pendingDocs.removeOne(doc->fileName());

    if (d->m_pendingDocs.isEmpty()) {
        disconnect(QmlJS::ModelManagerInterface::instance(),
                   SIGNAL(documentUpdated(QmlJS::Document::Ptr)),
                   this,
                   SLOT(documentReady(QmlJS::Document::Ptr)));
        emit eventDetailsChanged();
    }
}

} // namespace Internal
} // namespace QmlProfiler