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/****************************************************************************
**
** Copyright (C) 2021 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 "codesniphelpers.h"
#include <QtCore/QStringList>
#include <algorithm>
static inline int firstNonBlank(QStringView s)
{
const auto it = std::find_if(s.cbegin(), s.cend(),
[] (QChar c) { return !c.isSpace(); });
return int(it - s.cbegin());
}
static inline bool isEmpty(QStringView s)
{
return s.isEmpty()
|| std::all_of(s.cbegin(), s.cend(),
[] (QChar c) { return c.isSpace(); });
}
QString CodeSnipHelpers::dedent(const QString &code)
{
if (code.isEmpty())
return code;
// Right trim if indent=0, or trim if single line
if (!code.at(0).isSpace() || !code.contains(QLatin1Char('\n')))
return code.trimmed();
const auto lines = QStringView{code}.split(QLatin1Char('\n'));
int spacesToRemove = std::numeric_limits<int>::max();
for (const auto &line : lines) {
if (!isEmpty(line)) {
const int nonSpacePos = firstNonBlank(line);
if (nonSpacePos < spacesToRemove)
spacesToRemove = nonSpacePos;
if (spacesToRemove == 0)
return code;
}
}
QString result;
for (const auto &line : lines) {
if (!isEmpty(line) && spacesToRemove < line.size())
result += line.mid(spacesToRemove).toString();
result += QLatin1Char('\n');
}
return result;
}
QString CodeSnipHelpers::fixSpaces(QString code)
{
code.remove(QLatin1Char('\r'));
// Check for XML <tag>\n<space>bla...
if (code.startsWith(QLatin1String("\n ")))
code.remove(0, 1);
while (!code.isEmpty() && code.back().isSpace())
code.chop(1);
code = dedent(code);
if (!code.isEmpty() && !code.endsWith(QLatin1Char('\n')))
code.append(QLatin1Char('\n'));
return code;
}
// Prepend a line to the code, observing indentation
void CodeSnipHelpers::prependCode(QString *code, QString firstLine)
{
while (!code->isEmpty() && code->front() == QLatin1Char('\n'))
code->remove(0, 1);
if (!code->isEmpty() && code->front().isSpace()) {
const int indent = firstNonBlank(*code);
firstLine.prepend(QString(indent, QLatin1Char(' ')));
}
if (!firstLine.endsWith(QLatin1Char('\n')))
firstLine += QLatin1Char('\n');
code->prepend(firstLine);
}
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