1 files changed, 102 insertions, 0 deletions
diff --git a/sources/shiboken6/ApiExtractor/codesniphelpers.cpp b/sources/shiboken6/ApiExtractor/codesniphelpers.cpp
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index 000000000..f9bae0a65
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+++ b/sources/shiboken6/ApiExtractor/codesniphelpers.cpp
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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);
+}