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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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
* function_ref<void(function_ref<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(const 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(const Sink &sink, QStringView s, EscapeOptions options) {
if (options == EscapeOptions::OuterQuotes)
sink(u"\"");
int it0=0;
for (int it = 0; it < s.size();++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.size() - 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(const Sink &s, ErrorLevel level)
{
switch (level) {
case ErrorLevel::Debug:
s(u"Debug");
break;
case ErrorLevel::Info:
s(u"Info");
break;
case ErrorLevel::Warning:
s(u"Warning");
break;
case ErrorLevel::Error:
s(u"Error");
break;
case ErrorLevel::Fatal:
s(u"Fatal");
break;
}
}
void dumperToQDebug(const 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(const Dumper &dumper, ErrorLevel level)
{
QDebug d = qDebug().noquote().nospace();
switch (level) {
case ErrorLevel::Debug:
break;
case ErrorLevel::Info:
d = qInfo().noquote().nospace();
break;
case ErrorLevel::Warning:
d = qWarning().noquote().nospace();
break;
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(const Sink &s, int indent)
{
if (indent > 0) {
QStringView spaces = u" ";
while (indent > spaces.size()) {
s(spaces);
indent -= spaces.size();
}
s(spaces.left(indent));
}
}
/*!
* \internal
* \brief sinks a neline and indents by the given amount
*/
void sinkNewline(const 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
*/
QDebug operator<<(QDebug d, const Dumper &dumper)
{
QDebug dd = d.noquote().nospace();
dumper([&dd](QStringView s) { dd << s; });
return d;
}
} // end namespace Dom
} // end namespace QQmlJS
QT_END_NAMESPACE
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