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-rw-r--r--src/declarative/qml/qdeclarativebinding.cpp337
1 files changed, 177 insertions, 160 deletions
diff --git a/src/declarative/qml/qdeclarativebinding.cpp b/src/declarative/qml/qdeclarativebinding.cpp
index cb6ad8c76f..a7fbf4438f 100644
--- a/src/declarative/qml/qdeclarativebinding.cpp
+++ b/src/declarative/qml/qdeclarativebinding.cpp
@@ -55,6 +55,158 @@
QT_BEGIN_NAMESPACE
+QDeclarativeAbstractBinding::QDeclarativeAbstractBinding()
+: m_object(0), m_propertyIndex(-1), m_mePtr(0), m_prevBinding(0), m_nextBinding(0)
+{
+}
+
+QDeclarativeAbstractBinding::~QDeclarativeAbstractBinding()
+{
+ Q_ASSERT(m_prevBinding == 0);
+ Q_ASSERT(m_mePtr == 0);
+}
+
+/*!
+Destroy the binding. Use this instead of calling delete.
+
+Bindings are free to implement their own memory management, so the delete operator is not
+necessarily safe. The default implementation clears the binding, removes it from the object
+and calls delete.
+*/
+void QDeclarativeAbstractBinding::destroy()
+{
+ removeFromObject();
+ clear();
+
+ delete this;
+}
+
+/*!
+Add this binding to \a object.
+
+This transfers ownership of the binding to the object, marks the object's property as
+being bound.
+
+However, it does not enable the binding itself or call update() on it.
+*/
+void QDeclarativeAbstractBinding::addToObject(QObject *object, int index)
+{
+ Q_ASSERT(object);
+
+ if (m_object == object && m_propertyIndex == index)
+ return;
+
+ removeFromObject();
+
+ Q_ASSERT(!m_prevBinding);
+
+ m_object = object;
+ m_propertyIndex = index;
+
+ QDeclarativeData *data = QDeclarativeData::get(object, true);
+
+ if (index & 0xFF000000) {
+ // Value type
+
+ int coreIndex = index & 0xFFFFFF;
+
+ // Find the value type proxy (if there is one)
+ QDeclarativeValueTypeProxyBinding *proxy = 0;
+ if (data->hasBindingBit(coreIndex)) {
+ QDeclarativeAbstractBinding *b = data->bindings;
+ while (b && b->propertyIndex() != coreIndex)
+ b = b->m_nextBinding;
+ Q_ASSERT(b && b->bindingType() == QDeclarativeAbstractBinding::ValueTypeProxy);
+ proxy = static_cast<QDeclarativeValueTypeProxyBinding *>(b);
+ }
+
+ if (!proxy) {
+ proxy = new QDeclarativeValueTypeProxyBinding(object, coreIndex);
+ proxy->addToObject(object, coreIndex);
+ }
+
+ m_nextBinding = proxy->m_bindings;
+ if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
+ m_prevBinding = &proxy->m_bindings;
+ proxy->m_bindings = this;
+
+ } else {
+ m_nextBinding = data->bindings;
+ if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
+ m_prevBinding = &data->bindings;
+ data->bindings = this;
+
+ data->setBindingBit(m_object, index);
+ }
+}
+
+/*!
+Remove the binding from the object.
+*/
+void QDeclarativeAbstractBinding::removeFromObject()
+{
+ if (m_prevBinding) {
+ int index = propertyIndex();
+
+ *m_prevBinding = m_nextBinding;
+ if (m_nextBinding) m_nextBinding->m_prevBinding = m_prevBinding;
+ m_prevBinding = 0;
+ m_nextBinding = 0;
+
+ if (index & 0xFF000000) {
+ // Value type - we don't remove the proxy from the object. It will sit their happily
+ // doing nothing until it is removed by a write, a binding change or it is reused
+ // to hold more sub-bindings.
+ } else if (m_object) {
+ QDeclarativeData *data = QDeclarativeData::get(m_object, false);
+ if (data) data->clearBindingBit(index);
+ }
+
+ m_object = 0;
+ m_propertyIndex = -1;
+ }
+}
+
+static void bindingDummyDeleter(QDeclarativeAbstractBinding *)
+{
+}
+
+QDeclarativeAbstractBinding::Pointer QDeclarativeAbstractBinding::weakPointer()
+{
+ if (m_selfPointer.isNull())
+ m_selfPointer = QSharedPointer<QDeclarativeAbstractBinding>(this, bindingDummyDeleter);
+
+ return m_selfPointer.toWeakRef();
+}
+
+void QDeclarativeAbstractBinding::clear()
+{
+ if (m_mePtr) {
+ *m_mePtr = 0;
+ m_mePtr = 0;
+ }
+}
+
+QString QDeclarativeAbstractBinding::expression() const
+{
+ return QLatin1String("<Unknown>");
+}
+
+QObject *QDeclarativeAbstractBinding::object() const
+{
+ return m_object;
+}
+
+int QDeclarativeAbstractBinding::propertyIndex() const
+{
+ return m_propertyIndex;
+}
+
+void QDeclarativeAbstractBinding::setEnabled(bool enabled, QDeclarativePropertyPrivate::WriteFlags flags)
+{
+ if (enabled) update(flags);
+}
+
void QDeclarativeBindingPrivate::refresh()
{
Q_Q(QDeclarativeBinding);
@@ -255,20 +407,8 @@ void QDeclarativeBinding::setEnabled(bool e, QDeclarativePropertyPrivate::WriteF
d->enabled = e;
setNotifyOnValueChanged(e);
- QDeclarativeAbstractBinding::setEnabled(e, flags);
-
- if (e) {
- addToObject(d->property.object());
+ if (e)
update(flags);
- } else {
- removeFromObject();
- }
-}
-
-int QDeclarativeBinding::propertyIndex()
-{
- Q_D(QDeclarativeBinding);
- return QDeclarativePropertyPrivate::bindingIndex(d->property);
}
bool QDeclarativeBinding::enabled() const
@@ -283,127 +423,6 @@ QString QDeclarativeBinding::expression() const
return QDeclarativeExpression::expression();
}
-QDeclarativeAbstractBinding::QDeclarativeAbstractBinding()
-: m_object(0), m_mePtr(0), m_prevBinding(0), m_nextBinding(0)
-{
-}
-
-QDeclarativeAbstractBinding::~QDeclarativeAbstractBinding()
-{
- Q_ASSERT(m_prevBinding == 0);
- Q_ASSERT(m_mePtr == 0);
-}
-
-void QDeclarativeAbstractBinding::destroy()
-{
- removeFromObject();
- clear();
-
- delete this;
-}
-
-void QDeclarativeAbstractBinding::addToObject(QObject *object)
-{
- Q_ASSERT(object);
-
- if (m_object == object)
- return;
-
- int index = propertyIndex();
-
- removeFromObject();
-
- Q_ASSERT(!m_prevBinding);
-
- m_object = object;
- QDeclarativeData *data = QDeclarativeData::get(object, true);
-
- if (index & 0xFF000000) {
- // Value type
-
- int coreIndex = index & 0xFFFFFF;
-
- // Find the value type proxy (if there is one)
- QDeclarativeValueTypeProxyBinding *proxy = 0;
- if (data->hasBindingBit(coreIndex)) {
- QDeclarativeAbstractBinding *b = data->bindings;
- while (b && b->propertyIndex() != coreIndex)
- b = b->m_nextBinding;
- Q_ASSERT(b && b->bindingType() == QDeclarativeAbstractBinding::ValueTypeProxy);
- proxy = static_cast<QDeclarativeValueTypeProxyBinding *>(b);
- }
-
- if (!proxy)
- proxy = new QDeclarativeValueTypeProxyBinding(object, coreIndex);
- proxy->addToObject(object);
-
- m_nextBinding = proxy->m_bindings;
- if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
- m_prevBinding = &proxy->m_bindings;
- proxy->m_bindings = this;
-
- } else {
- m_nextBinding = data->bindings;
- if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
- m_prevBinding = &data->bindings;
- data->bindings = this;
-
- data->setBindingBit(m_object, index);
- }
-}
-
-void QDeclarativeAbstractBinding::removeFromObject()
-{
- if (m_prevBinding) {
- int index = propertyIndex();
-
- *m_prevBinding = m_nextBinding;
- if (m_nextBinding) m_nextBinding->m_prevBinding = m_prevBinding;
- m_prevBinding = 0;
- m_nextBinding = 0;
-
- if (index & 0xFF000000) {
- // Value type - we don't remove the proxy from the object. It will sit their happily
- // doing nothing for ever more.
- } else if (m_object) {
- QDeclarativeData *data = QDeclarativeData::get(m_object, false);
- if (data) data->clearBindingBit(index);
- }
-
- m_object = 0;
- }
-}
-
-static void bindingDummyDeleter(QDeclarativeAbstractBinding *)
-{
-}
-
-QDeclarativeAbstractBinding::Pointer QDeclarativeAbstractBinding::weakPointer()
-{
- if (m_selfPointer.isNull())
- m_selfPointer = QSharedPointer<QDeclarativeAbstractBinding>(this, bindingDummyDeleter);
-
- return m_selfPointer.toWeakRef();
-}
-
-void QDeclarativeAbstractBinding::clear()
-{
- if (m_mePtr) {
- *m_mePtr = 0;
- m_mePtr = 0;
- }
-}
-
-QString QDeclarativeAbstractBinding::expression() const
-{
- return QLatin1String("<Unknown>");
-}
-
-void QDeclarativeAbstractBinding::setEnabled(bool e, QDeclarativePropertyPrivate::WriteFlags)
-{
- if (e) m_mePtr = 0;
-}
-
QDeclarativeValueTypeProxyBinding::QDeclarativeValueTypeProxyBinding(QObject *o, int index)
: m_object(o), m_index(index), m_bindings(0)
{
@@ -421,16 +440,10 @@ QDeclarativeValueTypeProxyBinding::~QDeclarativeValueTypeProxyBinding()
void QDeclarativeValueTypeProxyBinding::setEnabled(bool e, QDeclarativePropertyPrivate::WriteFlags flags)
{
if (e) {
- addToObject(m_object);
-
QDeclarativeAbstractBinding *bindings = m_bindings;
- m_bindings = 0;
recursiveEnable(bindings, flags);
} else {
- removeFromObject();
-
QDeclarativeAbstractBinding *bindings = m_bindings;
- m_bindings = 0;
recursiveDisable(bindings);
}
}
@@ -440,13 +453,7 @@ void QDeclarativeValueTypeProxyBinding::recursiveEnable(QDeclarativeAbstractBind
if (!b)
return;
- QDeclarativeAbstractBinding *next = b->m_nextBinding;
- b->m_prevBinding = 0;
- b->m_nextBinding = 0;
- Q_ASSERT(b->m_mePtr == 0);
- b->m_mePtr = &b;
-
- recursiveEnable(next, flags);
+ recursiveEnable(b->m_nextBinding, flags);
if (b)
b->setEnabled(true, flags);
@@ -459,19 +466,8 @@ void QDeclarativeValueTypeProxyBinding::recursiveDisable(QDeclarativeAbstractBin
recursiveDisable(b->m_nextBinding);
- b->setEnabled(false, 0);
-
- Q_ASSERT(b->m_prevBinding == 0);
- Q_ASSERT(b->m_nextBinding == 0);
- b->m_nextBinding = m_bindings;
- if (b->m_nextBinding) b->m_nextBinding->m_prevBinding = &b->m_nextBinding;
- b->m_prevBinding = &m_bindings;
- m_bindings = b;
-}
-
-int QDeclarativeValueTypeProxyBinding::propertyIndex()
-{
- return m_index;
+ if (b)
+ b->setEnabled(false, 0);
}
void QDeclarativeValueTypeProxyBinding::update(QDeclarativePropertyPrivate::WriteFlags)
@@ -488,4 +484,25 @@ QDeclarativeAbstractBinding *QDeclarativeValueTypeProxyBinding::binding(int prop
return binding;
}
+/*!
+Removes a collection of bindings, corresponding to the set bits in \a mask.
+*/
+void QDeclarativeValueTypeProxyBinding::removeBindings(quint32 mask)
+{
+ QDeclarativeAbstractBinding *binding = m_bindings;
+ while (binding) {
+ if (mask & (1 << (binding->propertyIndex() >> 24))) {
+ QDeclarativeAbstractBinding *remove = binding;
+ binding = remove->m_nextBinding;
+ *remove->m_prevBinding = remove->m_nextBinding;
+ if (remove->m_nextBinding) remove->m_nextBinding->m_prevBinding = remove->m_prevBinding;
+ remove->m_prevBinding = 0;
+ remove->m_nextBinding = 0;
+ remove->destroy();
+ } else {
+ binding = binding->m_nextBinding;
+ }
+ }
+}
+
QT_END_NAMESPACE
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-15 07:36:00 +0000