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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt for Python.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "textstream.h"
#include <cstring>
TextStream::TextStream(QIODevice *device, Language l) :
m_str(device), m_language(l)
{
}
TextStream::TextStream(QString *string, Language l) :
m_str(string), m_language(l)
{
}
TextStream::TextStream(QByteArray *array, Language l) :
m_str(array), m_language(l)
{
}
TextStream::~TextStream() = default;
QChar TextStream::lastChar() const
{
auto s = m_str.string();
return s != nullptr && !s->isEmpty() ? *(s->crbegin()) : QChar();
}
void TextStream::setIndentation(int i)
{
Q_ASSERT(i >= 0);
m_indentation = i;
}
void TextStream::outdent(int n)
{
m_indentation -= n;
Q_ASSERT(m_indentation >= 0);
}
qint64 TextStream::pos() const
{
// QTextStream::pos() only works for QIODevice, be a bit smarter
if (auto s = m_str.string())
return s->size();
return m_str.pos();
}
void TextStream::putRepetitiveChars(char c, int count)
{
if (count > 0) {
for (int i = 0; i < count; ++i) {
const int ofw = m_str.fieldWidth();
m_str.setFieldWidth(0);
m_str << c;
m_str.setFieldWidth(ofw);
}
}
}
void TextStream::setLastCharClass(CharClass c)
{
m_lastCharClass = c;
}
void TextStream::writeIndent()
{
putRepetitiveChars(' ', m_indentation * m_tabWidth);
}
// Indent handling: If the last character was a new line
// and the upcoming one is none, indent the stream
// Special case for C++ : If the upcoming char is a '#', we don't
// indent (preprocessor directive).
template <class Char>
static TextStream::CharClass charClassHelper(Char c)
{
switch (c) {
case '\n':
return TextStream::CharClass::NewLine;
case '#':
return TextStream::CharClass::Hash;
default:
break;
}
return TextStream::CharClass::Other;
}
static inline TextStream::CharClass charClass(char c)
{ return charClassHelper(c); }
static inline TextStream::CharClass charClass(QChar c)
{ return charClassHelper(c.unicode()); }
void TextStream::checkIndent(CharClass upComingCharClass)
{
if (m_indentationEnabled && m_lastCharClass == CharClass::NewLine
&& (upComingCharClass != CharClass::NewLine
&& (m_language != Language::Cpp || upComingCharClass != CharClass::Hash))) {
writeIndent();
}
m_lastCharClass = upComingCharClass;
}
template <class Char>
void TextStream::putCharHelper(Char c)
{
checkIndent(charClass(c));
m_str << c;
}
void TextStream::putString(QStringView v)
{
if (v.isEmpty())
return;
if (v.contains(u'\n')) {
for (auto c : v)
putCharHelper(c);
} else {
// If there is no newline, write as a blob. This is important to make
// field formatting (alignment/width) working, else each char will be
// considered a field.
checkIndent(charClass(*v.cbegin()));
m_str << v;
m_lastCharClass = CharClass::Other;
}
}
void TextStream::putChar(QChar c)
{
putCharHelper(c);
}
void TextStream::putString(const char *s)
{
const char firstChar = *s;
if (firstChar == '\0')
return;
if (std::strchr(s, '\n') != nullptr) { // See above
for ( ; *s; ++s)
putCharHelper(*s);
} else {
checkIndent(charClass(firstChar));
m_str << s;
m_lastCharClass = CharClass::Other;
}
}
void TextStream::putChar(char c)
{
putCharHelper(c);
}
void TextStream::putInt(int t)
{
checkIndent(CharClass::Other);
m_str << t;
}
void TextStream::putSizeType(qsizetype t)
{
checkIndent(CharClass::Other);
m_str << t;
}
StringStream::StringStream(Language l) : TextStream(&m_buffer, l)
{
}
void StringStream::clear()
{
m_buffer.clear();
setLastCharClass(CharClass::NewLine);
}
void indent(TextStream &s)
{
s.indent();
}
void outdent(TextStream &s)
{
s.outdent();
}
void enableIndent(TextStream &s)
{
s.setIndentationEnabled(true);
}
void disableIndent(TextStream &s)
{
s.setIndentationEnabled(false);
}
void ensureEndl(TextStream &s)
{
if (s.lastChar() != QLatin1Char('\n'))
s << '\n';
}
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