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Copy pathshellimplgenerator.cpp
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390 lines (351 loc) · 14.7 KB
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/****************************************************************************
**
** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Script Generator project on Qt Labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <algorithm> // for std::sort
#include "shellimplgenerator.h"
#include "reporthandler.h"
#include "fileout.h"
#include <iostream>
extern void declareFunctionMetaTypes(QTextStream &stream,
const AbstractMetaFunctionList &functions,
QSet<QString> ®isteredTypeNames);
QString ShellImplGenerator::fileNameForClass(const AbstractMetaClass *meta_class) const
{
return QString("PythonQtWrapper_%1.cpp").arg(meta_class->name());
}
/* UNUSED
static bool include_less_than(const Include &a, const Include &b)
{
return a.name < b.name;
}
*/
static void writeHelperCode(QTextStream &, const AbstractMetaClass *)
{
}
void ShellImplGenerator::write(QTextStream &s, const AbstractMetaClass *meta_class)
{
setCurrentScope(meta_class);
QString builtIn = ShellGenerator::isBuiltIn(meta_class->name())?"_builtin":"";
QString fileBaseName = toFileNameBase(meta_class->package() + builtIn);
QString pro_file_name = fileBaseName + "/" + fileBaseName + ".pri";
priGenerator->addSource(pro_file_name, fileNameForClass(meta_class));
s << "#include \"PythonQtWrapper_" << meta_class->name() << ".h\"" << endl << endl;
s << "#include <PythonQtSignalReceiver.h>" << endl;
s << "#include <PythonQtMethodInfo.h>" << endl;
s << "#include <PythonQtConversion.h>" << endl;
//if (!meta_class->generateShellClass())
// return;
IncludeList list = meta_class->typeEntry()->extraIncludes();
std::sort(list.begin(), list.end());
foreach (const Include &inc, list) {
ShellGenerator::writeInclude(s, inc);
}
s << endl;
writeHelperCode(s, meta_class);
// find constructors
AbstractMetaFunctionList ctors;
ctors = meta_class->queryFunctions(AbstractMetaClass::Constructors
| AbstractMetaClass::WasVisible
| AbstractMetaClass::NotRemovedFromTargetLang);
// find member functions
AbstractMetaFunctionList functions = getFunctionsToWrap(meta_class);
// write metatype declarations
{
// QSet<QString> registeredTypeNames = m_qmetatype_declared_typenames;
// declareFunctionMetaTypes(s, functions, registeredTypeNames);
// s << endl;
}
if (meta_class->qualifiedCppName().contains("Ssl")) {
s << "#ifndef QT_NO_SSL" << endl;
}
bool generateShell = meta_class->generateShellClass() && !ctors.isEmpty();
if (generateShell) {
s << shellClassName(meta_class) << "::~" << shellClassName(meta_class) << "() {" << endl;
s << " PythonQtPrivate* priv = PythonQt::priv();" << endl;
s << " if (priv) { priv->shellClassDeleted(this); }" << endl;
s << "}" << endl;
AbstractMetaFunctionList virtualsForShell = getVirtualFunctionsForShell(meta_class);
foreach (const AbstractMetaFunction *fun, virtualsForShell) {
bool hasReturnValue = !fun->type().isNull();
writeFunctionSignature(s, fun, meta_class, QString(),
Option(ShowStatic | UnderscoreSpaces | UseIndexedName),
"PythonQtShell_");
s << endl << "{" << endl;
Option typeOptions = Option(UnderscoreSpaces | SkipName);
AbstractMetaArgumentList args = fun->arguments();
// we can't handle return values which are references right now, do not send those to Python...
if (!hasReturnValue || !fun->type()->isReference()) {
s << "if (_wrapper) {" << endl;
s << " PYTHONQT_GIL_SCOPE" << endl;
s << " if (((PyObject*)_wrapper)->ob_refcnt > 0) {" << endl;
s << " static PyObject* name = PyString_FromString(\"" << fun->name() << "\");" << endl;
s << " PyObject* obj = PyBaseObject_Type.tp_getattro((PyObject*)_wrapper, name);" << endl;
s << " if (obj) {" << endl;
s << " static const char* argumentList[] ={\"";
if (hasReturnValue) {
// write the arguments, return type first
writeTypeInfo(s, fun->type(), typeOptions);
}
s << "\"";
for (int i = 0; i < args.size(); ++i) {
s << " , \"";
writeTypeInfo(s, args.at(i)->type(), typeOptions);
s << "\"";
}
s << "};" << endl;
s << " static const PythonQtMethodInfo* methodInfo = PythonQtMethodInfo::getCachedMethodInfoFromArgumentList(" << QString::number(args.size() + 1) << ", argumentList);" << endl;
if (hasReturnValue) {
s << " ";
writeTypeInfo(s, fun->type(), typeOptions);
s << " returnValue{};" << endl;
}
s << " void* args[" << QString::number(args.size() + 1) << "] = {nullptr";
for (int i = 0; i < args.size(); ++i) {
s << ", (void*)&" << args.at(i)->indexedName();
}
s << "};" << endl;
s << " PyObject* result = PythonQtSignalTarget::call(obj, methodInfo, args, true);" << endl;
if (hasReturnValue) {
s << " if (result) {" << endl;
s << " args[0] = PythonQtConv::ConvertPythonToQt(methodInfo->parameters().at(0), result, false, nullptr, &returnValue);" << endl;
s << " if (args[0]!=&returnValue) {" << endl;
s << " if (args[0]==nullptr) {" << endl;
s << " PythonQt::priv()->handleVirtualOverloadReturnError(\"" << fun->name() << "\", methodInfo, result);" << endl;
s << " } else {" << endl;
s << " returnValue = *((";
writeTypeInfo(s, fun->type(), typeOptions);
s << "*)args[0]);" << endl;
s << " }" << endl;
s << " }" << endl;
s << " }" << endl;
}
s << " if (result) { Py_DECREF(result); }" << endl;
s << " Py_DECREF(obj);" << endl;
// ugly hack, we don't support QGraphicsScene* nor QGraphicsItem* QVariants in PythonQt...
if (fun->name() == "itemChange" && fun->type() && fun->type()->isVariant()) {
s << " if (change0 == QGraphicsItem::ItemParentChange || change0 == QGraphicsItem::ItemSceneChange) {\n";
s << " returnValue = value1;\n";
s << " } \n";
}
if (hasReturnValue) {
s << " return returnValue;" << endl;
}
else {
s << " return;" << endl;
}
s << " } else {" << endl;
s << " PyErr_Clear();" << endl;
s << " }" << endl;
s << " }" << endl;
s << "}" << endl;
}
s << " ";
if (fun->isAbstract()) {
if (fun->type()) {
// return empty default object
s << "return ";
if (fun->type()->indirections()>0) {
s << "nullptr;";
} else {
writeTypeInfo(s, fun->type(), typeOptions);
s << "();";
}
}
} else {
if (fun->type()) {
s << "return ";
}
s << meta_class->qualifiedCppName() << "::";
s << fun->originalName() << "(";
for (int i = 0; i < args.size(); ++i) {
if (i > 0) {
s << ", ";
}
s << args.at(i)->indexedName();
}
s << ");";
}
s << endl << "}" << endl;
}
}
if (meta_class->generateShellClass() || !meta_class->isAbstract()) {
// write constructors
foreach (const AbstractMetaFunction *ctor, ctors) {
if (ctor->isAbstract() || (!meta_class->generateShellClass() && !ctor->isPublic())) { continue; }
s << meta_class->qualifiedCppName() << "* ";
s << "PythonQtWrapper_" << meta_class->name() << "::";
writeFunctionSignature(s, ctor, 0, "new_", Option(AddOwnershipTemplates | ShowStatic));
s << endl;
s << "{ " << endl;
s << "return new " << (meta_class->generateShellClass()?shellClassName(meta_class):meta_class->qualifiedCppName()) << "(";
AbstractMetaArgumentList args = ctor->arguments();
for (int i = 0; i < args.size(); ++i) {
if (i > 0)
s << ", ";
s << args.at(i)->argumentName();
}
s << ");" << " }" << endl << endl;
}
}
if (generateShell && meta_class->isQObject()) {
s << "const QMetaObject* " << shellClassName(meta_class) << "::metaObject() const {" << endl;
s << " if (QObject::d_ptr->metaObject) {" << endl;
s << " return QObject::d_ptr->dynamicMetaObject();" << endl;
s << " } else if (_wrapper) {" << endl;
s << " return PythonQt::priv()->getDynamicMetaObject(_wrapper, &" << meta_class->qualifiedCppName() << "::staticMetaObject);" << endl;
s << " } else {" << endl;
s << " return &" << meta_class->qualifiedCppName() << "::staticMetaObject;" << endl;
s << " }" << endl;
s << "}" << endl;
s << "int " << shellClassName(meta_class) << "::qt_metacall(QMetaObject::Call call, int id, void** args) {" << endl;
s << " int result = " << meta_class->qualifiedCppName() << "::qt_metacall(call, id, args);" << endl;
s << " return result >= 0 ? PythonQt::priv()->handleMetaCall(this, _wrapper, call, id, args) : result;" << endl;
s << "}" << endl;
}
QString wrappedObject = " (*theWrappedObject)";
// write member functions
for (int i = 0; i < functions.size(); ++i) {
AbstractMetaFunction *fun = functions.at(i);
bool needsWrapping = functionNeedsNormalWrapperSlot(fun, meta_class);
if (!needsWrapping) {
continue;
}
writeFunctionSignature(s, fun, meta_class, QString(),
Option(AddOwnershipTemplates | ConvertReferenceToPtr | FirstArgIsWrappedObject | ShowStatic | UnderscoreSpaces | ProtectedEnumAsInts),
"PythonQtWrapper_");
s << endl << "{" << endl;
s << " ";
if (ShellGenerator::isSpecialStreamingOperator(fun)) {
s << fun->arguments().at(0)->argumentName();
if (fun->originalName().startsWith("operator>>")) {
s << " >> ";
} else {
s << " << ";
}
s << wrappedObject;
} else {
QString scriptFunctionName = fun->originalName();
AbstractMetaArgumentList args = fun->arguments();
// call the C++ implementation
if (fun->type()) {
s << "return ";
// call the C++ implementation
if (fun->type()->isReference()) {
s << "&";
}
}
s << "(";
if (scriptFunctionName.startsWith("operator>>") && !fun->wasProtected()) {
s << wrappedObject << " >>" << args.at(0)->argumentName();
} else if (scriptFunctionName.startsWith("operator<<") && !fun->wasProtected()) {
s << wrappedObject << " <<" << args.at(0)->argumentName();
} else if (scriptFunctionName.startsWith("operator[]") && !fun->wasProtected()) {
s << wrappedObject << "[" << args.at(0)->argumentName() << "]";
} else if (scriptFunctionName.startsWith("operator") && args.size()==1 && !fun->wasProtected()) {
QString op = scriptFunctionName.mid(8);
s << wrappedObject << op << " " << args.at(0)->argumentName();
}
else if (scriptFunctionName.startsWith("operator") && args.size() == 0 && scriptFunctionName.length() == 9 && !fun->wasProtected()) {
// only the unary operators consisting of one char can be applied by prepending the operator...
QString op = scriptFunctionName.mid(8);
// unary operator
s << op << " " << wrappedObject;
} else {
if (fun->isStatic()) {
if (fun->wasProtected()) {
s << promoterClassName(meta_class) << "::promoted_";
} else {
s << meta_class->qualifiedCppName() << "::";
}
} else {
if (fun->wasProtected()) {
//|| (fun->isVirtual() && meta_class->typeEntry()->shouldCreatePromoter())) {
s << " ((" << promoterClassName(meta_class) << "*)theWrappedObject)->promoted_";
} else {
s << " theWrappedObject->";
}
}
if (fun->wasProtected()) {
// this is different e.g. for operators
s << fun->name() << "(";
}
else {
s << fun->originalName() << "(";
}
for (int i = 0; i < args.size(); ++i) {
if (i > 0)
s << ", ";
s << args.at(i)->argumentName();
}
s << ")";
}
s << ")";
}
s << ";" << endl;
s << "}" << endl << endl;
}
if (meta_class->hasDefaultToStringFunction()) {
s << "QString PythonQtWrapper_" << meta_class->name() << "::py_toString(" << meta_class->qualifiedCppName() << "* obj) { return obj->toString(); }" << endl;
} else if (meta_class->hasToStringCapability()) {
FunctionModelItem fun = meta_class->hasToStringCapability();
int indirections = fun->arguments().at(1)->type().indirections();
QString deref = QLatin1String(indirections == 0 ? "*" : "");
s << "QString PythonQtWrapper_" << meta_class->name() << "::py_toString(" << meta_class->qualifiedCppName() << "* obj) {" << endl;
s << " QString result;" << endl;
s << " QDebug d(&result);" << endl;
s << " d << " << deref << "obj;" << endl;
s << " return result;" << endl;
s << "}" << endl << endl;
}
writeInjectedCode(s, meta_class);
if (meta_class->qualifiedCppName().contains("Ssl")) {
s << "#endif" << endl;
}
setCurrentScope(nullptr);
}
void ShellImplGenerator::writeInjectedCode(QTextStream &s, const AbstractMetaClass *meta_class)
{
CodeSnipList code_snips = meta_class->typeEntry()->codeSnips();
foreach (const CodeSnip &cs, code_snips) {
if (cs.language == TypeSystem::PyWrapperCode) {
s << cs.code() << endl;
}
}
}
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