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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "cppcanonicalsymbol.h"
#include "cpptoolsreuse.h"
#include <cplusplus/ExpressionUnderCursor.h>
#include <utils/textutils.h>
#include <QTextCursor>
#include <QTextDocument>
using namespace CPlusPlus;
namespace CppEditor::Internal {
CanonicalSymbol::CanonicalSymbol(const Document::Ptr &document,
const Snapshot &snapshot)
: m_document(document),
m_snapshot(snapshot)
{
m_typeOfExpression.init(document, snapshot);
m_typeOfExpression.setExpandTemplates(true);
}
const LookupContext &CanonicalSymbol::context() const
{
return m_typeOfExpression.context();
}
Scope *CanonicalSymbol::getScopeAndExpression(const QTextCursor &cursor, QString *code)
{
if (!m_document)
return nullptr;
QTextCursor tc = cursor;
int line, column;
Utils::Text::convertPosition(cursor.document(), tc.position(), &line, &column);
int pos = tc.position();
QTextDocument *textDocument = cursor.document();
if (!isValidIdentifierChar(textDocument->characterAt(pos)))
if (!(pos > 0 && isValidIdentifierChar(textDocument->characterAt(pos - 1))))
return nullptr;
while (isValidIdentifierChar(textDocument->characterAt(pos)))
++pos;
tc.setPosition(pos);
ExpressionUnderCursor expressionUnderCursor(m_document->languageFeatures());
*code = expressionUnderCursor(tc);
return m_document->scopeAt(line, column);
}
Symbol *CanonicalSymbol::operator()(const QTextCursor &cursor) &
{
QString code;
if (Scope *scope = getScopeAndExpression(cursor, &code))
return operator()(scope, code);
return nullptr;
}
Symbol *CanonicalSymbol::operator()(Scope *scope, const QString &code)
{
return canonicalSymbol(scope, code, m_typeOfExpression);
}
Symbol *CanonicalSymbol::canonicalSymbol(Scope *scope, const QString &code,
TypeOfExpression &typeOfExpression)
{
const QList<LookupItem> results =
typeOfExpression(code.toUtf8(), scope, TypeOfExpression::Preprocess);
for (int i = results.size() - 1; i != -1; --i) {
const LookupItem &r = results.at(i);
Symbol *decl = r.declaration();
if (!(decl && decl->enclosingScope()))
break;
if (Class *classScope = r.declaration()->enclosingScope()->asClass()) {
const Identifier *declId = decl->identifier();
const Identifier *classId = classScope->identifier();
if (classId && classId->match(declId))
continue; // skip it, it's a ctor or a dtor.
if (Function *funTy = r.declaration()->type()->asFunctionType()) {
if (funTy->isVirtual())
return r.declaration();
}
}
}
for (const auto &r : results) {
if (r.declaration())
return r.declaration();
}
return nullptr;
}
} // namespace CppEditor::Internal
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