summaryrefslogtreecommitdiffstats
path: root/libpyside/dynamicqmetaobject.cpp
blob: 4dfd80f1cb4f5a64ca68cce1584e849fe56b3e8a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
/*
* This file is part of the PySide project.
*
* Copyright (C) 2009-2010 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "dynamicqmetaobject.h"
#include "dynamicqmetaobject_p.h"
#include "pysidesignal.h"
#include "pysidesignal_p.h"
#include "pysideproperty.h"
#include "pysideproperty_p.h"
#include "pysideslot_p.h"

#include <QByteArray>
#include <QString>
#include <QStringList>
#include <QList>
#include <QLinkedList>
#include <QObject>
#include <cstring>
#include <QDebug>
#include <QMetaMethod>
#include <shiboken.h>

#define EMPTY_META_METHOD "0()"

using namespace PySide;

enum PropertyFlags  {
    Invalid = 0x00000000,
    Readable = 0x00000001,
    Writable = 0x00000002,
    Resettable = 0x00000004,
    EnumOrFlag = 0x00000008,
    StdCppSet = 0x00000100,
//     Override = 0x00000200,
    Constant = 0x00000400,
    Final = 0x00000800,
    Designable = 0x00001000,
    ResolveDesignable = 0x00002000,
    Scriptable = 0x00004000,
    ResolveScriptable = 0x00008000,
    Stored = 0x00010000,
    ResolveStored = 0x00020000,
    Editable = 0x00040000,
    ResolveEditable = 0x00080000,
    User = 0x00100000,
    ResolveUser = 0x00200000,
    Notify = 0x00400000
};

// these values are from moc source code, generator.cpp:66
enum MethodFlags {
    AccessPrivate = 0x00,
    AccessProtected = 0x01,
    AccessPublic = 0x02,
    MethodMethod = 0x00,
    MethodSignal = 0x04,
    MethodSlot = 0x08,
    MethodConstructor = 0x0c,
    MethodCompatibility = 0x10,
    MethodCloned = 0x20,
    MethodScriptable = 0x40
};

class DynamicQMetaObject::DynamicQMetaObjectPrivate
{
public:
    QList<MethodData> m_methods;
    QList<PropertyData> m_properties;

    // methods added/remove not writed on metadata yet
    int m_lastMethod;
    int m_lastProperty;
    int m_lastInfo;

    QMap<QByteArray, QByteArray> m_info;
    QByteArray m_className;
    bool m_updated; // when the meta data is not update
    bool m_invalid; // when the object need to be reconstructed
    int m_methodOffset;
    int m_propertyOffset;
    int m_count;
    int m_dataSize;
    int m_stringDataSize;
    int m_emptyMethod;
    int m_nullIndex;

    DynamicQMetaObjectPrivate()
        : m_lastMethod(0), m_lastProperty(0), m_lastInfo(0),
          m_updated(false), m_invalid(true), m_methodOffset(0), m_propertyOffset(0),
          m_count(0), m_dataSize(0), m_stringDataSize(0), m_emptyMethod(-1), m_nullIndex(0) {}

    int createMetaData(QMetaObject* metaObj, QLinkedList<QByteArray> &strings);
    void updateMetaObject(QMetaObject* metaObj);
    void writeMethodsData(const QList<MethodData>& methods, unsigned int** data, QLinkedList<QByteArray>& strings, int* prtIndex, int nullIndex, int flags);
};

static int registerString(const QByteArray& s, QLinkedList<QByteArray>& strings)
{
    int idx = 0;
    QLinkedList<QByteArray>::const_iterator it = strings.begin();
    QLinkedList<QByteArray>::const_iterator itEnd = strings.end();
    while (it != itEnd) {
        if (strcmp(*it, s) == 0)
            return idx;
        idx += it->size() + 1;
        ++it;
    }
    strings.append(s);
    return idx;
}

static int qvariant_nameToType(const char* name)
{
    if (!name)
        return 0;

    if (strcmp(name, "QVariant") == 0)
        return 0xffffffff;
    if (strcmp(name, "QCString") == 0)
        return QMetaType::QByteArray;
    if (strcmp(name, "Q_LLONG") == 0)
        return QMetaType::LongLong;
    if (strcmp(name, "Q_ULLONG") == 0)
        return QMetaType::ULongLong;
    if (strcmp(name, "QIconSet") == 0)
        return QMetaType::QIcon;

    uint tp = QMetaType::type(name);
    return tp < QMetaType::User ? tp : 0;
}

/*
  Returns true if the type is a QVariant types.
*/
static bool isVariantType(const char* type)
{
    return qvariant_nameToType(type) != 0;
}

/*!
  Returns true if the type is qreal.
*/
static bool isQRealType(const char *type)
{
    return strcmp(type, "qreal") == 0;
}

uint PropertyData::flags() const
{
    const char* typeName = type().data();
    uint flags = Invalid;
    if (!isVariantType(typeName))
         flags |= EnumOrFlag;
    else if (!isQRealType(typeName))
        flags |= qvariant_nameToType(typeName) << 24;

    if (PySide::Property::isReadable(m_data))
        flags |= Readable;

    if (PySide::Property::isWritable(m_data))
        flags |= Writable;

    if (PySide::Property::hasReset(m_data))
        flags |= Resettable;

    if (PySide::Property::isDesignable(m_data))
        flags |= Designable;
    else
        flags |= ResolveDesignable;

    if (PySide::Property::isScriptable(m_data))
        flags |= Scriptable;
    else
        flags |= ResolveScriptable;

    if (PySide::Property::isStored(m_data))
        flags |= Stored;
    else
        flags |= ResolveStored;

    //EDITABLE
    flags |= ResolveEditable;

    if (PySide::Property::isUser(m_data))
        flags |= User;
    else
        flags |= ResolveUser;

    if (m_notifyId != -1)
        flags |= Notify;

    if (PySide::Property::isConstant(m_data))
        flags |= Constant;

    if (PySide::Property::isFinal(m_data))
        flags |= Final;

    return flags;
}

// const QByteArray with EMPTY_META_METHOD, used to save some memory
const QByteArray MethodData::m_emptySig(EMPTY_META_METHOD);

MethodData::MethodData()
    : m_signature(m_emptySig)
{
}

MethodData::MethodData(QMetaMethod::MethodType mtype, const char* signature, const char* type)
    : m_signature(signature), m_mtype(mtype)
{
    if (qstrcmp(type, "void"))
        m_type = type;
}

void MethodData::clear()
{
    m_signature = m_emptySig;
    m_type.clear();
}

bool MethodData::isValid() const
{
    return m_signature != m_emptySig;
}

QMetaMethod::MethodType MethodData::methodType() const
{
    return m_mtype;
}

PropertyData::PropertyData()
    : m_notifyId(0), m_data(0)
{
}

PropertyData::PropertyData(const char* name, int notifyId, PySideProperty* data)
    : m_name(name), m_notifyId(notifyId), m_data(data)
{
}

QByteArray PropertyData::type() const
{
    return QByteArray(PySide::Property::getTypeName(m_data));
}


bool PropertyData::isValid() const
{
    return !m_name.isEmpty();
}

int PropertyData::notifyId() const
{
    return m_notifyId;
}

bool PropertyData::operator==(const PropertyData& other) const
{
    return m_data == other.m_data;
}

bool PropertyData::operator==(const char* name) const
{
    return m_name == QString(name);
}


DynamicQMetaObject::DynamicQMetaObject(PyTypeObject* type, const QMetaObject* base)
    : m_d(new DynamicQMetaObjectPrivate)
{
    d.superdata = base;
    d.stringdata = NULL;
    d.data = NULL;
    d.extradata = NULL;

    m_d->m_className = QByteArray(type->tp_name).split('.').last();
    m_d->m_methodOffset = base->methodCount() - 1;
    m_d->m_propertyOffset = base->propertyCount() - 1;
    parsePythonType(type);
}

DynamicQMetaObject::DynamicQMetaObject(const char* className, const QMetaObject* metaObject)
    : m_d(new DynamicQMetaObjectPrivate)
{
    d.superdata = metaObject;
    d.stringdata = 0;
    d.data = 0;
    d.extradata = 0;
    m_d->m_className = className;
    m_d->m_methodOffset = metaObject->methodCount() - 1;
    m_d->m_propertyOffset = metaObject->propertyCount() - 1;
}

DynamicQMetaObject::~DynamicQMetaObject()
{
    free(const_cast<char*>(d.stringdata));
    free(const_cast<uint*>(d.data));
    delete m_d;
}

int DynamicQMetaObject::addMethod(QMetaMethod::MethodType mtype, const char* signature, const char* type)
{
    int index = -1;
    int counter = 0;

    QList<MethodData>::iterator it = m_d->m_methods.begin();
    for (; it != m_d->m_methods.end(); ++it) {
        if ((it->signature() == signature) && (it->methodType() == mtype))
            return m_d->m_methodOffset + counter;
        else if (!it->isValid()) {
            index = counter;
            m_d->m_invalid = true; // need rewrite all methods again
        }
        counter++;
    }

    //has blank method
    if (index != -1) {
        m_d->m_methods[index] = MethodData(mtype, signature, type);
        index++;
    } else {
        m_d->m_methods << MethodData(mtype, signature, type);
        index = m_d->m_methods.size();
    }

    m_d->m_updated = false;
    return m_d->m_methodOffset + index;
}

void DynamicQMetaObject::removeMethod(QMetaMethod::MethodType mtype, uint index)
{
    const char* methodSig = method(index).signature();
    QList<MethodData>::iterator it = m_d->m_methods.begin();
    for (; it != m_d->m_methods.end(); ++it) {
        if ((it->signature() == methodSig) && (it->methodType() == mtype)){
            it->clear();
            m_d->m_invalid = true;
            break;
        }
    }
}

int DynamicQMetaObject::addSignal(const char* signal, const char* type)
{
    return addMethod(QMetaMethod::Signal, signal, type);
}

int DynamicQMetaObject::addSlot(const char* slot, const char* type)
{
    return addMethod(QMetaMethod::Slot, slot, type);
}

void DynamicQMetaObject::removeSlot(uint index)
{
    removeMethod(QMetaMethod::Slot, index);
}

void DynamicQMetaObject::removeSignal(uint index)
{
    removeMethod(QMetaMethod::Signal, index);
}

int DynamicQMetaObject::addProperty(const char* propertyName, PyObject* data)
{
    int index = m_d->m_properties.indexOf(propertyName);
    if (index != -1)
        return m_d->m_propertyOffset + index;

    // retrieve notifyId
    int notifyId = -1;
    PySideProperty* property = reinterpret_cast<PySideProperty*>(data);
    if (property->d->notify) {
        const char* signalNotify = PySide::Property::getNotifyName(property);
        if (signalNotify) {
            MethodData signalObject(QMetaMethod::Signal, signalNotify, "");
            notifyId = m_d->m_methods.indexOf(signalObject);
        }
    }

    //search for a empty space
    PropertyData blank;
    index = m_d->m_properties.indexOf(blank);
    if (index != -1) {
        m_d->m_properties[index] = PropertyData(propertyName, notifyId, property);
        m_d->m_invalid = true;
    } else {
        m_d->m_properties << PropertyData(propertyName, notifyId, property);
        index = m_d->m_properties.size();
    }
    m_d->m_updated = false;
    return  m_d->m_propertyOffset + index;
}

void DynamicQMetaObject::addInfo(const char* key, const char* value)
{
    m_d->m_info[key] = value;
}

void DynamicQMetaObject::addInfo(QMap<QByteArray, QByteArray> info)
{
    QMap<QByteArray, QByteArray>::const_iterator i = info.constBegin();
    while (i != info.constEnd()) {
        m_d->m_info[i.key()] = i.value();
        ++i;
    }
    m_d->m_updated = false;
}

const QMetaObject* DynamicQMetaObject::update() const
{
    if (!m_d->m_updated || m_d->m_invalid) {
        m_d->updateMetaObject(const_cast<DynamicQMetaObject*>(this));
        m_d->m_updated = true;
    }
    return this;
}

void DynamicQMetaObject::DynamicQMetaObjectPrivate::writeMethodsData(const QList<MethodData>& methods,
                                                                     unsigned int** data,
                                                                     QLinkedList<QByteArray>& strings,
                                                                     int* prtIndex,
                                                                     int nullIndex,
                                                                     int flags)
{
    int index = *prtIndex;
    //skip to last registered method
    QList<MethodData>::const_iterator it = methods.begin() + m_lastMethod;

    if (m_emptyMethod == -1)
        m_emptyMethod = registerString(EMPTY_META_METHOD, strings) + m_stringDataSize;

    for (; it != methods.end(); ++it) {
        if (it->signature() != EMPTY_META_METHOD)
            (*data)[index++] = registerString(it->signature(), strings) + m_stringDataSize; // func name
        else
            (*data)[index++] = m_emptyMethod; // func name

        (*data)[index++] = nullIndex; // arguments
        (*data)[index++] = !it->type().isEmpty() ? registerString(it->type(), strings) : nullIndex; // normalized type
        (*data)[index++] = nullIndex; // tags
        (*data)[index++] = flags  |  (it->methodType() == QMetaMethod::Signal ? MethodSignal : MethodSlot);
    }
    *prtIndex = index;

    //update last registered method
    m_lastMethod = methods.size();
}

void DynamicQMetaObject::parsePythonType(PyTypeObject* type)
{
    PyObject* attrs = type->tp_dict;
    PyObject* key = 0;
    PyObject* value = 0;
    Py_ssize_t pos = 0;

    typedef std::pair<const char*, PyObject*> PropPair;
    QLinkedList<PropPair> properties;

    Shiboken::AutoDecRef slotAttrName(Shiboken::String::fromCString(PYSIDE_SLOT_LIST_ATTR));

    while (PyDict_Next(attrs, &pos, &key, &value)) {
        if (Property::checkType(value)) {
            // Leave the properties to be register after signals because they may depend on notify signals
            int index = d.superdata->indexOfProperty(Shiboken::String::toCString(key));
            if (index == -1)
                properties << PropPair(Shiboken::String::toCString(key), value);
        } else if (Signal::checkType(value)) { // Register signals
            PySideSignal* data = reinterpret_cast<PySideSignal*>(value);
            const char* signalName = Shiboken::String::toCString(key);
            data->signalName = strdup(signalName);
            QByteArray sig;
            sig.reserve(128);
            for (int i = 0; i < data->signaturesSize; ++i) {
                sig = signalName;
                sig += '(';
                if (data->signatures[i])
                    sig += data->signatures[i];
                sig += ')';
                if (d.superdata->indexOfSignal(sig) == -1)
                    addSignal(sig);
            }
        } else if (PyFunction_Check(value)) { // Register slots
            if (PyObject_HasAttr(value, slotAttrName)) {
                PyObject* signatureList = PyObject_GetAttr(value, slotAttrName);
                for(Py_ssize_t i = 0, i_max = PyList_Size(signatureList); i < i_max; ++i) {
                    PyObject* signature = PyList_GET_ITEM(signatureList, i);
                    QByteArray sig(Shiboken::String::toCString(signature));
                    //slot the slot type and signature
                    QList<QByteArray> slotInfo = sig.split(' ');
                    int index = d.superdata->indexOfSlot(slotInfo[1]);
                    if (index == -1)
                        addSlot(slotInfo[1], slotInfo[0]);
                }
            }
        }
    }

    // Register properties
    foreach (PropPair propPair, properties)
        addProperty(propPair.first, propPair.second);

}

int DynamicQMetaObject::DynamicQMetaObjectPrivate::createMetaData(QMetaObject* metaObj, QLinkedList<QByteArray> &strings)
{
    uint n_methods = m_methods.size();
    uint n_properties = m_properties.size();
    uint n_info = m_info.size();
    int header[] = {3,                  // revision
                    0,                  // class name index in m_metadata
                    n_info, 0,          // classinfo and classinfo index
                    n_methods, 0,       // method count and method list index
                    n_properties, 0,    // prop count and prop indexes
                    0, 0,               // enum count and enum index
                    0, 0,               // constructors
                    0};                 // flags

    const int HEADER_LENGHT = sizeof(header)/sizeof(int);

    m_dataSize = HEADER_LENGHT + n_methods*5 + n_properties*4 + n_info*2 + 1;
    uint* data = reinterpret_cast<uint*>(realloc(const_cast<uint*>(metaObj->d.data), m_dataSize * sizeof(uint)));
    Q_ASSERT(data);
    std::memcpy(data, header, sizeof(header));

    registerString(m_className, strings); // register class string
    m_nullIndex = registerString("", strings); // register a null string

    metaObj->d.data = data;

    return HEADER_LENGHT;
}


void DynamicQMetaObject::DynamicQMetaObjectPrivate::updateMetaObject(QMetaObject* metaObj)
{
    uint *data = const_cast<uint*>(metaObj->d.data);
    int index = m_dataSize - 1; // remove the last 0
    QLinkedList<QByteArray> strings;

    if (!data || m_invalid) {
        if (m_invalid) {
            strings.clear();
            m_dataSize = m_stringDataSize = 0;
            m_lastMethod = m_lastInfo = m_lastProperty = 0;
            m_invalid = false;
        }

        index = createMetaData(metaObj, strings);
        data = const_cast<uint*>(metaObj->d.data);
    } else {
        int n_methods = m_methods.size() - m_lastMethod;
        int n_info = m_info.size() - m_lastInfo;
        uint n_properties = m_properties.size() - m_lastProperty;

        int extraSize = n_methods*5 + n_properties*4 + n_info*2;
        if (extraSize > 0) {
            m_dataSize += extraSize;
            //realloc data
            data = reinterpret_cast<uint*>(realloc(const_cast<uint*>(metaObj->d.data), m_dataSize * sizeof(uint)));
            Q_ASSERT(data);


            data[2] = m_info.size(); //update info size
            data[4] = m_methods.size(); //update number of methods
            data[6] = m_properties.size(); // update property size
            metaObj->d.data = data;
        } else {
            data = const_cast<uint*>(metaObj->d.data);
        }
    }

    //write class info
    if (m_info.size()) {
        if (data[3] == 0)
            data[3] = index;

        QMap<QByteArray, QByteArray>::const_iterator i = m_info.constBegin() + m_lastInfo; //TODO: info is a hash this can fail
        while (i != m_info.constEnd()) {
            int valueIndex = registerString(i.value(), strings);
            int keyIndex = registerString(i.key(), strings);
            data[index++] = keyIndex + m_stringDataSize;
            data[index++] = valueIndex + m_stringDataSize;
            i++;
        }

        m_lastInfo = m_info.size();
    }

    //write properties
    if (m_properties.size()) {
        if (data[7] == 0)
            data[7] = index;

        QList<PropertyData>::const_iterator i = m_properties.constBegin() + m_lastProperty;
        while(i != m_properties.constEnd()) {
            if (i->isValid()) {
                data[index++] = registerString(i->name(), strings) + m_stringDataSize; // name
            } else
                data[index++] = m_nullIndex;

            data[index++] = (i->isValid() ? (registerString(i->type(), strings) + m_stringDataSize) :  m_nullIndex); // normalized type
            data[index++] = i->flags();
            i++;
        }

        //write properties notify
        i = m_properties.constBegin() + m_lastProperty;
        while(i != m_properties.constEnd()) {
            data[index++] = i->notifyId() >= 0 ? i->notifyId() : 0; //signal notify index
            i++;
        }

        m_lastProperty = m_properties.size();
    }

    //write signals/slots
    if (m_methods.size()) {
        if (data[5] == 0)
            data[5] = index;

        writeMethodsData(m_methods, &data, strings, &index, m_nullIndex, AccessPublic);
    }

    data[index++] = 0; // the end

    // create the m_metadata string
    QByteArray str;
    QByteArray debugStr;
    foreach(QByteArray field, strings) {

        debugStr.append(field);
        debugStr.append('|');

        str.append(field);
        str.append(char(0));
    }

    int newSize = (m_stringDataSize + str.count()) * sizeof(char);
    char *stringdata = reinterpret_cast<char*>(realloc(const_cast<char*>(metaObj->d.stringdata), newSize));
    Q_ASSERT(stringdata);

    metaObj->d.stringdata = stringdata;

    stringdata += m_stringDataSize; //shift to the end of old position
    std::copy(str.begin(), str.end(), stringdata);

    m_stringDataSize = newSize;
    metaObj->d.data = data;
}