summaryrefslogtreecommitdiff
path: root/src/xmlpatterns/acceltree/qacceltreeresourceloader.cpp
blob: 9bb96185603744876d035932d81ba38252ca9b30 (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
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtCore/QFile>
#include <QtCore/QTextCodec>
#include <QtCore/QTimer>
#include <QtCore/QXmlStreamReader>

#include <QtNetwork/QNetworkRequest>

#include "qatomicstring_p.h"
#include "qautoptr_p.h"
#include "qcommonsequencetypes_p.h"

#include "qacceltreeresourceloader_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

AccelTreeResourceLoader::AccelTreeResourceLoader(const NamePool::Ptr &np,
                                                 const NetworkAccessDelegator::Ptr &manager,
                                                 AccelTreeBuilder<true>::Features features)
    : m_namePool(np)
    , m_networkAccessDelegator(manager)
    , m_features(features)
{
    Q_ASSERT(m_namePool);
    Q_ASSERT(m_networkAccessDelegator);
}

bool AccelTreeResourceLoader::retrieveDocument(const QUrl &uri,
                                               const ReportContext::Ptr &context)
{
    Q_ASSERT(uri.isValid());
    AccelTreeBuilder<true> builder(uri, uri, m_namePool, context.data(), m_features);

    const AutoPtr<QNetworkReply> reply(load(uri, m_networkAccessDelegator, context));

    if(!reply)
        return false;

    bool success = false;
    success = streamToReceiver(reply.data(), &builder, m_namePool, context, uri);

    m_loadedDocuments.insert(uri, builder.builtDocument());
    return success;
}

bool AccelTreeResourceLoader::retrieveDocument(QIODevice *source, const QUrl &documentUri, const ReportContext::Ptr &context)
{
    Q_ASSERT(source);
    Q_ASSERT(source->isReadable());
    Q_ASSERT(documentUri.isValid());

    AccelTreeBuilder<true> builder(documentUri, documentUri, m_namePool, context.data(), m_features);

    bool success = false;
    success = streamToReceiver(source, &builder, m_namePool, context, documentUri);

    m_loadedDocuments.insert(documentUri, builder.builtDocument());

    return success;
}

QNetworkReply *AccelTreeResourceLoader::load(const QUrl &uri,
                                             const NetworkAccessDelegator::Ptr &networkDelegator,
                                             const ReportContext::Ptr &context, ErrorHandling errorHandling)
{
    return load(uri,
                networkDelegator->managerFor(uri),
                context, errorHandling);
}

QNetworkReply *AccelTreeResourceLoader::load(const QUrl &uri,
                                             QNetworkAccessManager *const networkManager,
                                             const ReportContext::Ptr &context, ErrorHandling errorHandling)

{
    Q_ASSERT(networkManager);
    Q_ASSERT(uri.isValid());

    NetworkLoop networkLoop;

    QNetworkRequest request(uri);
    QNetworkReply *const reply = networkManager->get(request);
    networkLoop.connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), SLOT(error(QNetworkReply::NetworkError)));
    networkLoop.connect(reply, SIGNAL(finished()), SLOT(finished()));

    if(networkLoop.exec(QEventLoop::ExcludeUserInputEvents))
    {
        const QString errorMessage(escape(reply->errorString()));

        /* Note, we delete reply before we exit this function with error(). */
        delete reply;

        const QSourceLocation location(uri);

        if(context && (errorHandling == FailOnError))
            context->error(errorMessage, ReportContext::FODC0002, location);

        return 0;
    }
    else
        return reply;
}

bool AccelTreeResourceLoader::streamToReceiver(QIODevice *const dev,
                                               AccelTreeBuilder<true> *const receiver,
                                               const NamePool::Ptr &np,
                                               const ReportContext::Ptr &context,
                                               const QUrl &uri)
{
    Q_ASSERT(dev);
    Q_ASSERT(receiver);
    Q_ASSERT(np);

    QXmlStreamReader reader(dev);

    /* Optimize: change NamePool to take QStringRef such that we don't have to call toString() below. That
     * will save us a gazillion of temporary QStrings. */

    while(!reader.atEnd())
    {
        reader.readNext();

        switch(reader.tokenType())
        {
            case QXmlStreamReader::StartElement:
            {
                /* Send the name. */
                receiver->startElement(np->allocateQName(reader.namespaceUri().toString(), reader.name().toString(),
                                                         reader.prefix().toString()), reader.lineNumber(), reader.columnNumber());

                /* Send namespace declarations. */
                const QXmlStreamNamespaceDeclarations &nss = reader.namespaceDeclarations();

                /* The far most common case, is for it to be empty. */
                if(!nss.isEmpty())
                {
                    const int len = nss.size();

                    for(int i = 0; i < len; ++i)
                    {
                        const QXmlStreamNamespaceDeclaration &ns = nss.at(i);
                        receiver->namespaceBinding(np->allocateBinding(ns.prefix().toString(), ns.namespaceUri().toString()));
                    }
                }

                /* Send attributes. */
                const QXmlStreamAttributes &attrs = reader.attributes();
                const int len = attrs.size();

                for(int i = 0; i < len; ++i)
                {
                    const QXmlStreamAttribute &attr = attrs.at(i);

                    receiver->attribute(np->allocateQName(attr.namespaceUri().toString(), attr.name().toString(),
                                                          attr.prefix().toString()),
                                        attr.value());
                }

                continue;
            }
            case QXmlStreamReader::EndElement:
            {
                receiver->endElement();
                continue;
            }
            case QXmlStreamReader::Characters:
            {
                if(reader.isWhitespace())
                    receiver->whitespaceOnly(reader.text());
                else
                    receiver->characters(reader.text());

                continue;
            }
            case QXmlStreamReader::Comment:
            {
                receiver->comment(reader.text().toString());
                continue;
            }
            case QXmlStreamReader::ProcessingInstruction:
            {
                receiver->processingInstruction(np->allocateQName(QString(), reader.processingInstructionTarget().toString()),
                                                reader.processingInstructionData().toString());
                continue;
            }
            case QXmlStreamReader::StartDocument:
            {
                receiver->startDocument();
                continue;
            }
            case QXmlStreamReader::EndDocument:
            {
                receiver->endDocument();
                continue;
            }
            case QXmlStreamReader::EntityReference:
            /* Fallthrough. */
            case QXmlStreamReader::DTD:
            {
                /* We just ignore any DTD and entity references. */
                continue;
            }
            case QXmlStreamReader::Invalid:
            {
                if(context)
                    context->error(escape(reader.errorString()), ReportContext::FODC0002, QSourceLocation(uri, reader.lineNumber(), reader.columnNumber()));

                return false;
            }
            case QXmlStreamReader::NoToken:
            {
                Q_ASSERT_X(false, Q_FUNC_INFO,
                           "This token is never expected to be received.");
                return false;
            }
        }
    }

    return true;
}

Item AccelTreeResourceLoader::openDocument(const QUrl &uri,
                                           const ReportContext::Ptr &context)
{
    const AccelTree::Ptr doc(m_loadedDocuments.value(uri));

    if(doc)
        return doc->root(QXmlNodeModelIndex()); /* Pass in dummy object. We know AccelTree doesn't use it. */
    else
    {
        if(retrieveDocument(uri, context))
            return m_loadedDocuments.value(uri)->root(QXmlNodeModelIndex()); /* Pass in dummy object. We know AccelTree doesn't use it. */
        else
            return Item();
    }
}

Item AccelTreeResourceLoader::openDocument(QIODevice *source, const QUrl &documentUri,
                                           const ReportContext::Ptr &context)
{
    const AccelTree::Ptr doc(m_loadedDocuments.value(documentUri));

    if(doc)
        return doc->root(QXmlNodeModelIndex()); /* Pass in dummy object. We know AccelTree doesn't use it. */
    else
    {
        if(retrieveDocument(source, documentUri, context))
            return m_loadedDocuments.value(documentUri)->root(QXmlNodeModelIndex()); /* Pass in dummy object. We know AccelTree doesn't use it. */
        else
            return Item();
    }
}

SequenceType::Ptr AccelTreeResourceLoader::announceDocument(const QUrl &uri, const Usage)
{
    // TODO deal with the usage thingy
    Q_ASSERT(uri.isValid());
    Q_ASSERT(!uri.isRelative());
    Q_UNUSED(uri); /* Needed when compiling in release mode. */

    return CommonSequenceTypes::ZeroOrOneDocumentNode;
}

bool AccelTreeResourceLoader::isDocumentAvailable(const QUrl &uri)
{
    return retrieveDocument(uri, ReportContext::Ptr());
}

static inline uint qHash(const QPair<QUrl, QString> &desc)
{
    /* Probably a lousy hash. */
    return qHash(desc.first) + qHash(desc.second);
}

bool AccelTreeResourceLoader::retrieveUnparsedText(const QUrl &uri,
                                                   const QString &encoding,
                                                   const ReportContext::Ptr &context,
                                                   const SourceLocationReflection *const where)
{
    const AutoPtr<QNetworkReply> reply(load(uri, m_networkAccessDelegator, context));

    if(!reply)
        return false;

    const QTextCodec * codec;
    if(encoding.isEmpty())
    {
        /* XSL Transformations (XSLT) Version 2.0 16.2 Reading Text Files:
         *
         * "if the media type of the resource is text/xml or application/xml
         * (see [RFC2376]), or if it matches the conventions text/\*+xml or
         * application/\*+xml (see [RFC3023] and/or its successors), then the
         * encoding is recognized as specified in [XML 1.0]"
         */
        codec = QTextCodec::codecForMib(106);
    }
    else
    {
        codec = QTextCodec::codecForName(encoding.toLatin1());
        if(codec && context)
        {
            context->error(QtXmlPatterns::tr("%1 is an unsupported encoding.").arg(formatURI(encoding)),
                           ReportContext::XTDE1190,
                           where);
        }
        else
            return false;
    }

    QTextCodec::ConverterState converterState;
    const QByteArray inData(reply->readAll());
    const QString result(codec->toUnicode(inData.constData(), inData.length(), &converterState));

    if(converterState.invalidChars)
    {
        if(context)
        {
            context->error(QtXmlPatterns::tr("%1 contains octets which are disallowed in "
                                             "the requested encoding %2.").arg(formatURI(uri),
                                                                               formatURI(encoding)),
                           ReportContext::XTDE1190,
                           where);
        }
        else
            return false;
    }

    const int len = result.length();
    /* This code is a candidate for threading. Divide and conqueror. */
    for(int i = 0; i < len; ++i)
    {
        if(!QXmlUtils::isChar(result.at(i)))
        {
            if(context)
            {
                context->error(QtXmlPatterns::tr("The codepoint %1, occurring in %2 using encoding %3, "
                                                 "is an invalid XML character.").arg(formatData(result.at(i)),
                                                                                     formatURI(uri),
                                                                                     formatURI(encoding)),
                               ReportContext::XTDE1190,
                               where);
            }
            else
                return false;
        }
    }

    m_unparsedTexts.insert(qMakePair(uri, encoding), result);
    return true;
}

bool AccelTreeResourceLoader::isUnparsedTextAvailable(const QUrl &uri,
                                                      const QString &encoding)
{
    return retrieveUnparsedText(uri, encoding, ReportContext::Ptr(), 0);
}

Item AccelTreeResourceLoader::openUnparsedText(const QUrl &uri,
                                               const QString &encoding,
                                               const ReportContext::Ptr &context,
                                               const SourceLocationReflection *const where)
{
    const QString &text = m_unparsedTexts.value(qMakePair(uri, encoding));

    if(text.isNull())
    {
        if(retrieveUnparsedText(uri, encoding, context, where))
            return openUnparsedText(uri, encoding, context, where);
        else
            return Item();
    }
    else
        return AtomicString::fromValue(text);
}

QSet<QUrl> AccelTreeResourceLoader::deviceURIs() const
{
     QHash<QUrl, AccelTree::Ptr>::const_iterator it(m_loadedDocuments.constBegin());
     const QHash<QUrl, AccelTree::Ptr>::const_iterator end(m_loadedDocuments.constEnd());
     QSet<QUrl> retval;

     while (it != end)
     {
         if(it.key().toString().startsWith(QLatin1String("tag:trolltech.com,2007:QtXmlPatterns:QIODeviceVariable:")))
             retval.insert(it.key());

         ++it;
     }

     return retval;
}

void AccelTreeResourceLoader::clear(const QUrl &uri)
{
    m_loadedDocuments.remove(uri);
}

QT_END_NAMESPACE