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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef QMLTCOUTPUTPRIMITIVES_H
#define QMLTCOUTPUTPRIMITIVES_H
#include <QtCore/qstack.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringbuilder.h>
QT_BEGIN_NAMESPACE
struct QmltcOutput
{
QString header;
QString cpp;
};
class QmltcOutputWrapper
{
QmltcOutput &m_code;
template<typename String>
static void rawAppend(QString &out, const String &what, int extraIndent = 0)
{
constexpr char16_t newLine[] = u"\n";
out += QString(extraIndent * 4, u' ') + what + newLine;
}
public:
QmltcOutputWrapper(QmltcOutput &code) : m_code(code) { }
const QmltcOutput &code() const { return m_code; }
QStack<QString> memberScopes; // member name scopes e.g. MyClass::MySubclass::
int headerIndent = 0; // header indentation level
int cppIndent = 0; // cpp indentation level
// manages current scope of the generated code, which is necessary for
// cpp file generation. Example:
// class MyClass { MyClass(); }; - in header
// MyClass::MyClass() {} - in cpp
// MemberNameScope makes sure "MyClass::" is recorded
struct MemberNameScope
{
QmltcOutputWrapper *m_code;
MemberNameScope(QmltcOutputWrapper *code, const QString &str) : m_code(code)
{
m_code->memberScopes.push(str);
}
~MemberNameScope() { m_code->memberScopes.pop(); }
Q_DISABLE_COPY_MOVE(MemberNameScope)
};
struct HeaderIndentationScope
{
QmltcOutputWrapper *m_code;
HeaderIndentationScope(QmltcOutputWrapper *code) : m_code(code) { ++m_code->headerIndent; }
~HeaderIndentationScope() { --m_code->headerIndent; }
Q_DISABLE_COPY_MOVE(HeaderIndentationScope)
};
struct CppIndentationScope
{
QmltcOutputWrapper *m_code;
CppIndentationScope(QmltcOutputWrapper *code) : m_code(code) { ++m_code->cppIndent; }
~CppIndentationScope() { --m_code->cppIndent; }
Q_DISABLE_COPY_MOVE(CppIndentationScope)
};
// appends string \a what with extra indentation \a extraIndent to current
// header string
template<typename String>
void rawAppendToHeader(const String &what, int extraIndent = 0)
{
rawAppend(m_code.header, what, headerIndent + extraIndent);
}
// appends string \a what with extra indentation \a extraIndent to current
// cpp string
template<typename String>
void rawAppendToCpp(const String &what, int extraIndent = 0)
{
rawAppend(m_code.cpp, what, cppIndent + extraIndent);
}
// special case of rawAppendToCpp that makes sure that string "foo()"
// becomes "MyClass::foo()"
template<typename String>
void rawAppendSignatureToCpp(const String &what, int extraIndent = 0)
{
QString signatureScope;
for (const auto &scope : memberScopes)
signatureScope += scope + u"::";
rawAppendToCpp(signatureScope + what, extraIndent);
}
};
QT_END_NAMESPACE
#endif // QMLTCOUTPUTPRIMITIVES_H
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