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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
qmlcodeparser.cpp
*/
#include "qmlcodeparser.h"
#include "node.h"
#include "config.h"
#include "qmlvisitor.h"
#ifndef QT_NO_DECLARATIVE
# include <private/qqmljsast_p.h>
# include <private/qqmljsastvisitor_p.h>
#endif
#include <qdebug.h>
QT_BEGIN_NAMESPACE
/*!
Constructs the QML code parser.
*/
QmlCodeParser::QmlCodeParser()
#ifndef QT_NO_DECLARATIVE
: lexer(nullptr), parser(nullptr)
#endif
{
}
/*!
Destroys the QML code parser.
*/
QmlCodeParser::~QmlCodeParser() {}
/*!
Initializes the code parser base class. The \a config argument
is passed to the initialization functions in the base class.
Also creates a lexer and parser from QQmlJS.
*/
void QmlCodeParser::initializeParser(const Config &config)
{
CodeParser::initializeParser(config);
#ifndef QT_NO_DECLARATIVE
lexer = new QQmlJS::Lexer(&engine);
parser = new QQmlJS::Parser(&engine);
#endif
}
/*!
Terminates the QML code parser. Deletes the lexer and parser
created by the constructor.
*/
void QmlCodeParser::terminateParser()
{
#ifndef QT_NO_DECLARATIVE
delete lexer;
delete parser;
#endif
}
/*!
Returns "QML".
*/
QString QmlCodeParser::language()
{
return "QML";
}
/*!
Returns a string list containing "*.qml". This is the only
file type parsed by the QMLN parser.
*/
QStringList QmlCodeParser::sourceFileNameFilter()
{
return QStringList() << "*.qml";
}
/*!
Parses the source file at \a filePath and inserts the contents
into the database. The \a location is used for error reporting.
If it can't open the file at \a filePath, it reports an error
and returns without doing anything.
*/
void QmlCodeParser::parseSourceFile(const Location &location, const QString &filePath)
{
QFile in(filePath);
currentFile_ = filePath;
if (!in.open(QIODevice::ReadOnly)) {
location.error(tr("Cannot open QML file '%1'").arg(filePath));
currentFile_.clear();
return;
}
#ifndef QT_NO_DECLARATIVE
QString document = in.readAll();
in.close();
Location fileLocation(filePath);
QString newCode = document;
extractPragmas(newCode);
lexer->setCode(newCode, 1);
if (parser->parse()) {
QQmlJS::AST::UiProgram *ast = parser->ast();
QmlDocVisitor visitor(filePath, newCode, &engine, topicCommands() + commonMetaCommands(),
topicCommands());
QQmlJS::AST::Node::accept(ast, &visitor);
if (visitor.hasError()) {
qDebug().nospace() << qPrintable(filePath) << ": Could not analyze QML file. "
<< "The output is incomplete.";
}
}
const auto &messages = parser->diagnosticMessages();
for (const auto &msg : messages) {
qDebug().nospace() << qPrintable(filePath) << ':'
# if Q_QML_PRIVATE_API_VERSION < 5
<< msg.loc.startLine << ": QML syntax error at col "
<< msg.loc.startColumn
# else
<< msg.line << ": QML syntax error at col " << msg.column
# endif
<< ": " << qPrintable(msg.message);
}
currentFile_.clear();
#else
location.warning("QtDeclarative not installed; cannot parse QML or JS.");
#endif
}
static QSet<QString> topicCommands_;
/*!
Returns the set of strings representing the topic commands.
*/
const QSet<QString> &QmlCodeParser::topicCommands()
{
if (topicCommands_.isEmpty()) {
topicCommands_ << COMMAND_VARIABLE << COMMAND_QMLCLASS << COMMAND_QMLTYPE
<< COMMAND_QMLPROPERTY << COMMAND_QMLPROPERTYGROUP // mws 13/03/2019
<< COMMAND_QMLATTACHEDPROPERTY << COMMAND_QMLSIGNAL
<< COMMAND_QMLATTACHEDSIGNAL << COMMAND_QMLMETHOD
<< COMMAND_QMLATTACHEDMETHOD << COMMAND_QMLBASICTYPE << COMMAND_JSTYPE
<< COMMAND_JSPROPERTY << COMMAND_JSPROPERTYGROUP // mws 13/03/2019
<< COMMAND_JSATTACHEDPROPERTY << COMMAND_JSSIGNAL << COMMAND_JSATTACHEDSIGNAL
<< COMMAND_JSMETHOD << COMMAND_JSATTACHEDMETHOD << COMMAND_JSBASICTYPE;
}
return topicCommands_;
}
#ifndef QT_NO_DECLARATIVE
/*!
Copy and paste from src/declarative/qml/qdeclarativescriptparser.cpp.
This function blanks out the section of the \a str beginning at \a idx
and running for \a n characters.
*/
static void replaceWithSpace(QString &str, int idx, int n)
{
QChar *data = str.data() + idx;
const QChar space(QLatin1Char(' '));
for (int ii = 0; ii < n; ++ii)
*data++ = space;
}
/*!
Copy & paste from src/declarative/qml/qdeclarativescriptparser.cpp,
then modified to return no values.
Searches for ".pragma <value>" declarations within \a script.
Currently supported pragmas are: library
*/
void QmlCodeParser::extractPragmas(QString &script)
{
const QString pragma(QLatin1String("pragma"));
const QString library(QLatin1String("library"));
QQmlJS::Lexer l(nullptr);
l.setCode(script, 0);
int token = l.lex();
while (true) {
if (token != QQmlJSGrammar::T_DOT)
return;
int startOffset = l.tokenOffset();
int startLine = l.tokenStartLine();
token = l.lex();
if (token != QQmlJSGrammar::T_IDENTIFIER || l.tokenStartLine() != startLine
|| script.mid(l.tokenOffset(), l.tokenLength()) != pragma)
return;
token = l.lex();
if (token != QQmlJSGrammar::T_IDENTIFIER || l.tokenStartLine() != startLine)
return;
QString pragmaValue = script.mid(l.tokenOffset(), l.tokenLength());
int endOffset = l.tokenLength() + l.tokenOffset();
token = l.lex();
if (l.tokenStartLine() == startLine)
return;
if (pragmaValue == QLatin1String("library"))
replaceWithSpace(script, startOffset, endOffset - startOffset);
else
return;
}
return;
}
#endif
QT_END_NAMESPACE
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