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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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 Digia. For licensing terms and
** conditions see http://www.qt.io/licensing. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "typehierarchybuilder.h"
#include <cplusplus/DependencyTable.h>
#include <cplusplus/FindUsages.h>
using namespace CppTools;
namespace {
QString unqualifyName(const QString &qualifiedName)
{
const int index = qualifiedName.lastIndexOf(QLatin1String("::"));
if (index == -1)
return qualifiedName;
return qualifiedName.right(qualifiedName.length() - index - 2);
}
class DerivedHierarchyVisitor : public CPlusPlus::SymbolVisitor
{
public:
DerivedHierarchyVisitor(const QString &qualifiedName)
: _qualifiedName(qualifiedName)
, _unqualifiedName(unqualifyName(qualifiedName))
{}
void execute(const CPlusPlus::Document::Ptr &doc, const CPlusPlus::Snapshot &snapshot);
virtual bool visit(CPlusPlus::Class *);
const QList<CPlusPlus::Symbol *> &derived() { return _derived; }
const QStringList otherBases() { return _otherBases; }
private:
CPlusPlus::LookupContext _context;
QString _qualifiedName;
QString _unqualifiedName;
CPlusPlus::Overview _overview;
QHash<CPlusPlus::Symbol *, QString> _actualBases;
QStringList _otherBases;
QList<CPlusPlus::Symbol *> _derived;
};
void DerivedHierarchyVisitor::execute(const CPlusPlus::Document::Ptr &doc,
const CPlusPlus::Snapshot &snapshot)
{
_derived.clear();
_otherBases.clear();
_context = CPlusPlus::LookupContext(doc, snapshot);
for (unsigned i = 0; i < doc->globalSymbolCount(); ++i)
accept(doc->globalSymbolAt(i));
}
bool DerivedHierarchyVisitor::visit(CPlusPlus::Class *symbol)
{
for (unsigned i = 0; i < symbol->baseClassCount(); ++i) {
CPlusPlus::BaseClass *baseSymbol = symbol->baseClassAt(i);
QString baseName = _actualBases.value(baseSymbol);
if (baseName.isEmpty()) {
QList<CPlusPlus::LookupItem> items = _context.lookup(baseSymbol->name(), symbol->enclosingScope());
if (items.isEmpty() || !items.first().declaration())
continue;
CPlusPlus::Symbol *actualBaseSymbol = items.first().declaration();
if (actualBaseSymbol->isTypedef()) {
CPlusPlus::NamedType *namedType = actualBaseSymbol->type()->asNamedType();
if (!namedType) {
// Anonymous aggregate such as: typedef struct {} Empty;
continue;
}
const QString &typeName = _overview.prettyName(namedType->name());
if (typeName == _unqualifiedName || typeName == _qualifiedName) {
items = _context.lookup(namedType->name(), actualBaseSymbol->enclosingScope());
if (items.isEmpty() || !items.first().declaration())
continue;
actualBaseSymbol = items.first().declaration();
}
}
const QList<const CPlusPlus::Name *> &full
= CPlusPlus::LookupContext::fullyQualifiedName(actualBaseSymbol);
baseName = _overview.prettyName(full);
_actualBases.insert(baseSymbol, baseName);
}
if (_qualifiedName == baseName)
_derived.append(symbol);
else
_otherBases.append(baseName);
}
return true;
}
} // namespace
TypeHierarchy::TypeHierarchy() : _symbol(0)
{}
TypeHierarchy::TypeHierarchy(CPlusPlus::Symbol *symbol) : _symbol(symbol)
{}
CPlusPlus::Symbol *TypeHierarchy::symbol() const
{
return _symbol;
}
const QList<TypeHierarchy> &TypeHierarchy::hierarchy() const
{
return _hierarchy;
}
TypeHierarchyBuilder::TypeHierarchyBuilder(CPlusPlus::Symbol *symbol, const CPlusPlus::Snapshot &snapshot)
: _symbol(symbol)
, _snapshot(snapshot)
{
_dependencyTable.build(_snapshot);
}
void TypeHierarchyBuilder::reset()
{
_visited.clear();
_candidates.clear();
}
TypeHierarchy TypeHierarchyBuilder::buildDerivedTypeHierarchy()
{
reset();
TypeHierarchy hierarchy(_symbol);
buildDerived(&hierarchy, filesDependingOn(_symbol));
return hierarchy;
}
void TypeHierarchyBuilder::buildDerived(TypeHierarchy *typeHierarchy,
const QStringList &dependingFiles)
{
CPlusPlus::Symbol *symbol = typeHierarchy->_symbol;
if (_visited.contains(symbol))
return;
_visited.insert(symbol);
const QString &symbolName = _overview.prettyName(CPlusPlus::LookupContext::fullyQualifiedName(symbol));
DerivedHierarchyVisitor visitor(symbolName);
foreach (const QString &fileName, dependingFiles) {
CPlusPlus::Document::Ptr doc = _snapshot.document(fileName);
if ((_candidates.contains(fileName) && !_candidates.value(fileName).contains(symbolName))
|| !doc->control()->findIdentifier(symbol->identifier()->chars(),
symbol->identifier()->size())) {
continue;
}
visitor.execute(doc, _snapshot);
_candidates.insert(fileName, QSet<QString>());
foreach (const QString &candidate, visitor.otherBases())
_candidates[fileName].insert(candidate);
foreach (CPlusPlus::Symbol *s, visitor.derived()) {
TypeHierarchy derivedHierarchy(s);
buildDerived(&derivedHierarchy, filesDependingOn(s));
typeHierarchy->_hierarchy.append(derivedHierarchy);
}
}
}
QStringList TypeHierarchyBuilder::filesDependingOn(CPlusPlus::Symbol *symbol) const
{
if (!symbol)
return QStringList();
const QString file = QString::fromUtf8(symbol->fileName(), symbol->fileNameLength());
return QStringList() << file << _dependencyTable.filesDependingOn(file);
}
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