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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "qqmljsfunctioninitializer_p.h"
#include <private/qqmljsmemorypool_p.h>
#include <QtCore/qloggingcategory.h>
#include <QtCore/qfileinfo.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
/*!
* \internal
* \class QQmlJSFunctionInitializer
*
* QQmlJSFunctionInitializer analyzes the IR to produce an initial
* QQmlJSCompilePass::Function for further analysis. It only looks for the
* signature and the QML scope and doesn't visit the byte code.
*/
static QString bindingTypeDescription(QmlIR::Binding::Type type)
{
switch (type) {
case QmlIR::Binding::Type_Invalid:
return u"invalid"_s;
case QmlIR::Binding::Type_Boolean:
return u"a boolean"_s;
case QmlIR::Binding::Type_Number:
return u"a number"_s;
case QmlIR::Binding::Type_String:
return u"a string"_s;
case QmlIR::Binding::Type_Null:
return u"null"_s;
case QmlIR::Binding::Type_Translation:
return u"a translation"_s;
case QmlIR::Binding::Type_TranslationById:
return u"a translation by id"_s;
case QmlIR::Binding::Type_Script:
return u"a script"_s;
case QmlIR::Binding::Type_Object:
return u"an object"_s;
case QmlIR::Binding::Type_AttachedProperty:
return u"an attached property"_s;
case QmlIR::Binding::Type_GroupProperty:
return u"a grouped property"_s;
}
return u"nothing"_s;
}
void QQmlJSFunctionInitializer::populateSignature(
const QV4::Compiler::Context *context, QQmlJS::AST::FunctionExpression *ast,
QQmlJSCompilePass::Function *function, QQmlJS::DiagnosticMessage *error)
{
const auto signatureError = [&](const QString &message) {
error->type = QtWarningMsg;
error->loc = ast->firstSourceLocation();
error->message = message;
};
QQmlJS::AST::BoundNames arguments;
if (ast->formals)
arguments = ast->formals->formals();
if (function->argumentTypes.isEmpty()) {
for (const QQmlJS::AST::BoundName &argument : qAsConst(arguments)) {
if (argument.typeAnnotation) {
if (const auto type = m_typeResolver->typeFromAST(argument.typeAnnotation->type)) {
function->argumentTypes.append(
m_typeResolver->tracked(
m_typeResolver->globalType(type)));
} else {
function->argumentTypes.append(
m_typeResolver->tracked(
m_typeResolver->globalType(m_typeResolver->varType())));
signatureError(u"Cannot resolve the argument type %1."_s
.arg(argument.typeAnnotation->type->toString()));
}
} else {
function->argumentTypes.append(
m_typeResolver->tracked(
m_typeResolver->globalType(m_typeResolver->varType())));
signatureError(u"Functions without type annotations won't be compiled"_s);
}
}
}
if (!function->returnType) {
if (ast->typeAnnotation) {
function->returnType = m_typeResolver->typeFromAST(ast->typeAnnotation->type);
if (!function->returnType)
signatureError(u"Cannot resolve return type %1"_s.arg(
QmlIR::IRBuilder::asString(ast->typeAnnotation->type->typeId)));
}
}
function->addressableScopes = m_typeResolver->objectsById();
function->code = context->code;
function->sourceLocations = context->sourceLocationTable.get();
}
static void diagnose(
const QString &message, QtMsgType type, const QQmlJS::SourceLocation &location,
QQmlJS::DiagnosticMessage *error)
{
*error = QQmlJS::DiagnosticMessage{
message,
type,
location
};
}
QQmlJSCompilePass::Function QQmlJSFunctionInitializer::run(
const QV4::Compiler::Context *context,
const QString &propertyName, const QmlIR::Binding &irBinding,
QQmlJS::DiagnosticMessage *error)
{
QQmlJS::SourceLocation bindingLocation;
bindingLocation.startLine = irBinding.location.line();
bindingLocation.startColumn = irBinding.location.column();
QQmlJSCompilePass::Function function;
function.qmlScope = m_scopeType;
if (irBinding.type() != QmlIR::Binding::Type_Script) {
diagnose(u"Binding is not a script binding, but %1."_s.arg(
bindingTypeDescription(QmlIR::Binding::Type(quint32(irBinding.type())))),
QtDebugMsg, bindingLocation, error);
}
function.isProperty = m_objectType->hasProperty(propertyName);
if (!function.isProperty && QmlIR::IRBuilder::isSignalPropertyName(propertyName)) {
const QString signalName = QmlIR::IRBuilder::signalNameFromSignalPropertyName(propertyName);
if (signalName.endsWith(u"Changed"_s)
&& m_objectType->hasProperty(signalName.chopped(strlen("Changed")))) {
function.isSignalHandler = true;
} else {
const auto methods = m_objectType->methods(signalName);
for (const auto &method : methods) {
if (method.methodType() == QQmlJSMetaMethod::Signal) {
function.isSignalHandler = true;
break;
}
}
}
if (!function.isSignalHandler) {
diagnose(u"Could not compile signal handler for %1: The signal does not exist"_s.arg(
signalName),
QtWarningMsg, bindingLocation, error);
}
}
if (!function.isSignalHandler) {
if (!function.isProperty) {
diagnose(u"Could not compile binding for %1: The property does not exist"_s.arg(
propertyName),
QtWarningMsg, bindingLocation, error);
}
const auto property = m_objectType->property(propertyName);
function.returnType = property.isList()
? m_typeResolver->listType(property.type(), QQmlJSTypeResolver::UseQObjectList)
: QQmlJSScope::ConstPtr(property.type());
if (!function.returnType) {
diagnose(u"Cannot resolve property type %1 for binding on %2"_s.arg(
property.typeName(), propertyName),
QtWarningMsg, bindingLocation, error);
}
if (!property.bindable().isEmpty() && !property.isPrivate())
function.isQPropertyBinding = true;
}
QQmlJS::MemoryPool pool;
auto astNode = m_currentObject->functionsAndExpressions->slowAt(
irBinding.value.compiledScriptIndex)->node;
auto ast = astNode->asFunctionDefinition();
if (!ast) {
QQmlJS::AST::Statement *stmt = astNode->statementCast();
if (!stmt) {
Q_ASSERT(astNode->expressionCast());
QQmlJS::AST::ExpressionNode *expr = astNode->expressionCast();
stmt = new (&pool) QQmlJS::AST::ExpressionStatement(expr);
}
auto body = new (&pool) QQmlJS::AST::StatementList(stmt);
body = body->finish();
QString name = u"binding for "_s; // ####
ast = new (&pool) QQmlJS::AST::FunctionDeclaration(
pool.newString(name), /*formals*/ nullptr, body);
ast->lbraceToken = astNode->firstSourceLocation();
ast->functionToken = ast->lbraceToken;
ast->rbraceToken = astNode->lastSourceLocation();
}
populateSignature(context, ast, &function, error);
return function;
}
QQmlJSCompilePass::Function QQmlJSFunctionInitializer::run(
const QV4::Compiler::Context *context,
const QString &functionName, const QmlIR::Function &irFunction,
QQmlJS::DiagnosticMessage *error)
{
Q_UNUSED(functionName);
QQmlJSCompilePass::Function function;
function.qmlScope = m_scopeType;
auto astNode = m_currentObject->functionsAndExpressions->slowAt(irFunction.index)->node;
auto ast = astNode->asFunctionDefinition();
Q_ASSERT(ast);
populateSignature(context, ast, &function, error);
return function;
}
QT_END_NAMESPACE
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