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#include "qmljsscopebuilder.h"
#include "qmljsbind.h"
#include "qmljsinterpreter.h"
#include "qmljsevaluate.h"
#include "parser/qmljsast_p.h"
using namespace QmlJS;
using namespace QmlJS::Interpreter;
using namespace QmlJS::AST;
ScopeBuilder::ScopeBuilder(Document::Ptr doc, Interpreter::Context *context)
: _doc(doc)
, _context(context)
{
}
ScopeBuilder::~ScopeBuilder()
{
}
void ScopeBuilder::push(AST::Node *node)
{
_nodes += node;
// QML scope object
Node *qmlObject = cast<UiObjectDefinition *>(node);
if (! qmlObject)
qmlObject = cast<UiObjectBinding *>(node);
if (qmlObject)
setQmlScopeObject(qmlObject);
// JS scopes
if (FunctionDeclaration *fun = cast<FunctionDeclaration *>(node)) {
ObjectValue *functionScope = _doc->bind()->findFunctionScope(fun);
_context->scopeChain().jsScopes += functionScope;
}
_context->scopeChain().update();
}
void ScopeBuilder::push(const QList<AST::Node *> &nodes)
{
foreach (Node *node, nodes)
push(node);
}
void ScopeBuilder::pop()
{
Node *toRemove = _nodes.last();
_nodes.removeLast();
// JS scopes
if (cast<FunctionDeclaration *>(toRemove))
_context->scopeChain().jsScopes.removeLast();
// QML scope object
if (! _nodes.isEmpty()
&& (cast<UiObjectDefinition *>(toRemove) || cast<UiObjectBinding *>(toRemove)))
setQmlScopeObject(_nodes.last());
_context->scopeChain().update();
}
void ScopeBuilder::setQmlScopeObject(Node *node)
{
ScopeChain &scopeChain = _context->scopeChain();
if (_doc->bind()->isGroupedPropertyBinding(node)) {
UiObjectDefinition *definition = cast<UiObjectDefinition *>(node);
if (!definition)
return;
const Value *v = scopeObjectLookup(definition->qualifiedTypeNameId);
if (!v)
return;
const ObjectValue *object = v->asObjectValue();
if (!object)
return;
scopeChain.qmlScopeObjects.clear();
scopeChain.qmlScopeObjects += object;
}
const ObjectValue *scopeObject = _doc->bind()->findQmlObject(node);
if (scopeObject) {
scopeChain.qmlScopeObjects.clear();
scopeChain.qmlScopeObjects += scopeObject;
} else {
return; // Probably syntax errors, where we're working with a "recovered" AST.
}
// check if the object has a Qt.ListElement or Qt.Connections ancestor
// ### allow only signal bindings for Connections
const ObjectValue *prototype = scopeObject->prototype(_context);
while (prototype) {
if (const QmlObjectValue *qmlMetaObject = dynamic_cast<const QmlObjectValue *>(prototype)) {
if ((qmlMetaObject->className() == QLatin1String("ListElement")
|| qmlMetaObject->className() == QLatin1String("Connections")
) && qmlMetaObject->packageName() == QLatin1String("Qt")) {
scopeChain.qmlScopeObjects.clear();
break;
}
}
prototype = prototype->prototype(_context);
}
// check if the object has a Qt.PropertyChanges ancestor
prototype = scopeObject->prototype(_context);
prototype = isPropertyChangesObject(_context, prototype);
// find the target script binding
if (prototype) {
UiObjectInitializer *initializer = 0;
if (UiObjectDefinition *definition = cast<UiObjectDefinition *>(node))
initializer = definition->initializer;
if (UiObjectBinding *binding = cast<UiObjectBinding *>(node))
initializer = binding->initializer;
if (initializer) {
for (UiObjectMemberList *m = initializer->members; m; m = m->next) {
if (UiScriptBinding *scriptBinding = cast<UiScriptBinding *>(m->member)) {
if (scriptBinding->qualifiedId
&& scriptBinding->qualifiedId->name->asString() == QLatin1String("target")
&& ! scriptBinding->qualifiedId->next) {
// ### make Evaluate understand statements.
if (ExpressionStatement *expStmt = cast<ExpressionStatement *>(scriptBinding->statement)) {
Evaluate evaluator(_context);
const Value *targetValue = evaluator(expStmt->expression);
if (const ObjectValue *target = value_cast<const ObjectValue *>(targetValue)) {
scopeChain.qmlScopeObjects.prepend(target);
} else {
scopeChain.qmlScopeObjects.clear();
}
}
}
}
}
}
}
}
const Value *ScopeBuilder::scopeObjectLookup(AST::UiQualifiedId *id)
{
// do a name lookup on the scope objects
const Value *result = 0;
foreach (const ObjectValue *scopeObject, _context->scopeChain().qmlScopeObjects) {
const ObjectValue *object = scopeObject;
for (UiQualifiedId *it = id; it; it = it->next) {
result = object->property(it->name->asString(), _context);
if (!result)
break;
if (it->next) {
object = result->asObjectValue();
if (!object) {
result = 0;
break;
}
}
}
if (result)
break;
}
return result;
}
const ObjectValue *ScopeBuilder::isPropertyChangesObject(Context *context,
const ObjectValue *object)
{
const ObjectValue *prototype = object;
while (prototype) {
if (const QmlObjectValue *qmlMetaObject = dynamic_cast<const QmlObjectValue *>(prototype)) {
if (qmlMetaObject->className() == QLatin1String("PropertyChanges")
&& qmlMetaObject->packageName() == QLatin1String("Qt"))
return prototype;
}
prototype = prototype->prototype(context);
}
return 0;
}
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