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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**/
#include "qqmldomstringdumper_p.h"
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace Dom {
/*!
* \internal
* \tn QQmlJS::Dom::Sink
* \brief A Sink is a function that accepts a QStringView as input
*
* A Sink it the core element of a text based stream oriented output.
* It is simply a function accepting a QStringView as input.
*/
/*!
* \internal
* \tn QQmlJS::Dom::sinkInt
* \brief writes an integer to a sink without any axtra heap allocation
* \param sink where to write
* \param i the integer to write out
*
* mainly for debugging/fatal errors
*/
/*!
* \internal
* \class QQmlJS::Dom::Dumper
* \brief Helper class to accept eithe a string or a dumper (a function that writes to a sink)
*
* Using a Dumper as input parameter one always obtains a dumper (i.e. a
* std::function<void(std::function<void(QStringView)>)> , but can pass in any
* object accepted by QStringView, and it is automatically converted to a dumper.
*/
/*!
* \internal
* \brief Converts a dumper to a string
* \param writer The dumper convert to a string
*/
QString dumperToString(Dumper writer)
{
QString s;
QTextStream d(&s);
writer([&d](QStringView s){ d << s; });
d.flush();
return s;
}
/*!
* \internal
* \brief dumps a string as quoted string (escaping things like quotes or newlines)
* \param sink The sink to write the quoted string to
* \param s The string to sink
* \param options If quotes should be outputted around the string (defaults to yes)
*/
void sinkEscaped(Sink sink, QStringView s, EscapeOptions options) {
if (options == EscapeOptions::OuterQuotes)
sink(u"\"");
int it0=0;
for (int it = 0; it < s.length();++it) {
QChar c=s[it];
bool noslash = c != QLatin1Char('\\');
bool noquote = c != QLatin1Char('"');
bool nonewline = c != QLatin1Char('\n');
bool noreturn = c != QLatin1Char('\r');
if (noslash && noquote && nonewline && noreturn)
continue;
sink(s.mid(it0, it - it0));
it0 = it + 1;
if (!noslash)
sink(u"\\\\");
else if (!noquote)
sink(u"\\\"");
else if (!nonewline)
sink(u"\\n");
else if (!noreturn)
sink(u"\\r");
else
Q_ASSERT(0);
}
sink(s.mid(it0, s.length() - it0));
if (options == EscapeOptions::OuterQuotes)
sink(u"\"");
}
/*!
* \internal
* \brief Dumps a string describing the given error level (ErrorLevel::Error -> Error,...)
* \param s the sink to write to
* \param level the level to describe
*/
void dumpErrorLevel(Sink s, ErrorLevel level)
{
switch (level) {
case ErrorLevel::Debug:
s(u"Debug");
break;
case ErrorLevel::Info:
s(u"Info");
break;
case ErrorLevel::Hint:
s(u"Hint");
break;
case ErrorLevel::MaybeWarning:
s(u"MaybeWarn");
break;
case ErrorLevel::Warning:
s(u"Warning");
break;
case ErrorLevel::MaybeError:
s(u"MaybeErr");
break;
case ErrorLevel::Error:
s(u"Error");
break;
case ErrorLevel::Fatal:
s(u"Fatal");
break;
}
}
void dumperToQDebug(Dumper dumper, QDebug debug)
{
QDebug & d = debug.noquote().nospace();
dumper([&d](QStringView s){
d << s;
});
}
/*!
* \internal
* \brief writes the dumper to the QDebug object corrsponding to the given error level
* \param level the error level of the message
* \param dumper the dumper that writes a message
*/
void dumperToQDebug(Dumper dumper, ErrorLevel level)
{
QDebug d = qDebug().noquote().nospace();
switch (level) {
case ErrorLevel::Debug:
break;
case ErrorLevel::Info:
case ErrorLevel::Hint:
d = qInfo().noquote().nospace();
break;
case ErrorLevel::MaybeWarning:
case ErrorLevel::Warning:
d = qWarning().noquote().nospace();
break;
case ErrorLevel::MaybeError:
case ErrorLevel::Error:
case ErrorLevel::Fatal: // should be handled differently (avoid allocations...), we try to catch them before ending up here
d = qCritical().noquote().nospace();
break;
}
dumper([&d](QStringView s){
d << s;
});
}
/*!
* \internal
* \brief sinks the requested amount of spaces
*/
void sinkIndent(Sink s, int indent)
{
if (indent > 0) {
QStringView spaces = u" ";
while (indent > spaces.length()) {
s(spaces);
indent -= spaces.length();
}
s(spaces.left(indent));
}
}
/*!
* \internal
* \brief sinks a neline and indents by the given amount
*/
void sinkNewline(Sink s, int indent)
{
s(u"\n");
if (indent > 0)
sinkIndent(s, indent);
}
/*!
* \internal
* \fn QQmlJS::Dom::devNull
* \brief A sink that ignores whatever it receives
*/
} // end namespace Dom
} // end namespace QQmlJS
QT_END_NAMESPACE
|
