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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef QQMLJSSCOPESBYID_P_H
#define QQMLJSSCOPESBYID_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#include "qqmljsscope_p.h"
#include <QtCore/qhash.h>
#include <QtCore/qstring.h>
QT_BEGIN_NAMESPACE
enum QQmlJSScopesByIdOption: char {
Default = 0,
AssumeComponentsAreBound = 1,
};
Q_DECLARE_FLAGS(QQmlJSScopesByIdOptions, QQmlJSScopesByIdOption);
class QQmlJSScopesById
{
public:
bool componentsAreBound() const { return m_componentsAreBound; }
void setComponentsAreBound(bool bound) { m_componentsAreBound = bound; }
void setSignaturesAreEnforced(bool enforced) { m_signaturesAreEnforced = enforced; }
bool signaturesAreEnforced() const { return m_signaturesAreEnforced; }
void setValueTypesAreAddressable(bool addressable) { m_valueTypesAreAddressable = addressable; }
bool valueTypesAreAddressable() const { return m_valueTypesAreAddressable; }
QString id(const QQmlJSScope::ConstPtr &scope, const QQmlJSScope::ConstPtr &referrer,
QQmlJSScopesByIdOptions options = Default) const
{
const QQmlJSScope::ConstPtr referrerRoot = componentRoot(referrer);
for (auto it = m_scopesById.begin(), end = m_scopesById.end(); it != end; ++it) {
if (*it == scope && isComponentVisible(componentRoot(*it), referrerRoot, options))
return it.key();
}
return QString();
}
/*!
\internal
Returns the scope that has id \a id in the component to which \a referrer belongs to.
If no such scope exists, a null scope is returned.
*/
QQmlJSScope::ConstPtr scope(const QString &id, const QQmlJSScope::ConstPtr &referrer,
QQmlJSScopesByIdOptions options = Default) const
{
Q_ASSERT(!id.isEmpty());
const auto range = m_scopesById.equal_range(id);
if (range.first == range.second)
return QQmlJSScope::ConstPtr();
const QQmlJSScope::ConstPtr referrerRoot = componentRoot(referrer);
for (auto it = range.first; it != range.second; ++it) {
if (isComponentVisible(componentRoot(*it), referrerRoot, options))
return *it;
}
return QQmlJSScope::ConstPtr();
}
void insert(const QString &id, const QQmlJSScope::ConstPtr &scope)
{
Q_ASSERT(!id.isEmpty());
m_scopesById.insert(id, scope);
}
void clear() { m_scopesById.clear(); }
/*!
\internal
Returns \c true if \a id exists anywhere in the current document.
This is still allowed if the other occurrence is in a different (inline) component.
Check the return value of scope to know whether the id has already been assigned
in a givne scope.
*/
bool existsAnywhereInDocument(const QString &id) const { return m_scopesById.contains(id); }
private:
static QQmlJSScope::ConstPtr componentRoot(const QQmlJSScope::ConstPtr &inner)
{
QQmlJSScope::ConstPtr scope = inner;
while (scope && !scope->isComponentRootElement() && !scope->isInlineComponent()) {
if (QQmlJSScope::ConstPtr parent = scope->parentScope())
scope = parent;
else
break;
}
return scope;
}
bool isComponentVisible(const QQmlJSScope::ConstPtr &observed,
const QQmlJSScope::ConstPtr &observer,
QQmlJSScopesByIdOptions options) const
{
if (!m_componentsAreBound && !options.testAnyFlag(AssumeComponentsAreBound))
return observed == observer;
for (QQmlJSScope::ConstPtr scope = observer; scope; scope = scope->parentScope()) {
if (scope == observed)
return true;
}
return false;
}
QMultiHash<QString, QQmlJSScope::ConstPtr> m_scopesById;
bool m_componentsAreBound = false;
bool m_signaturesAreEnforced = true;
bool m_valueTypesAreAddressable = false;
};
QT_END_NAMESPACE
#endif // QQMLJSSCOPESBYID_P_H
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