summaryrefslogtreecommitdiffstats
path: root/src/qml/jsruntime/qv4include.cpp
blob: 9bbcc0e21b411addd442b1b96449ac1b30ce82ea (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
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qv4include_p.h"
#include "qv4scopedvalue_p.h"

#include <QtQml/qjsengine.h>
#include <QtNetwork/qnetworkrequest.h>
#include <QtNetwork/qnetworkreply.h>
#include <QtCore/qfile.h>
#include <QtQml/qqmlfile.h>

#include <private/qqmlengine_p.h>
#include <private/qv4engine_p.h>
#include <private/qv4functionobject_p.h>
#include <private/qv4script_p.h>
#include <private/qv4context_p.h>
#include <private/qqmlcontextwrapper_p.h>

QT_BEGIN_NAMESPACE

QV4Include::QV4Include(const QUrl &url, QV4::ExecutionEngine *engine, QQmlContextData *context,
                       const QV4::Value &qmlglobal, const QV4::Value &callback)
    : v4(engine), m_network(0), m_reply(0), m_url(url), m_redirectCount(0), m_context(context)
{
    m_qmlglobal.set(engine, qmlglobal);
    if (callback.as<QV4::FunctionObject>())
        m_callbackFunction.set(engine, callback);

    m_resultObject.set(v4, resultValue(v4));

    m_network = engine->v8Engine->networkAccessManager();

    QNetworkRequest request;
    request.setUrl(url);

    m_reply = m_network->get(request);
    QObject::connect(m_reply, SIGNAL(finished()), this, SLOT(finished()));
}

QV4Include::~QV4Include()
{
    delete m_reply; m_reply = 0;
}

QV4::ReturnedValue QV4Include::resultValue(QV4::ExecutionEngine *v4, Status status)
{
    QV4::Scope scope(v4);

    // XXX It seems inefficient to create this object from scratch each time.
    QV4::ScopedObject o(scope, v4->newObject());
    QV4::ScopedString s(scope);
    QV4::ScopedValue v(scope);
    o->put((s = v4->newString(QStringLiteral("OK"))), (v = QV4::Primitive::fromInt32(Ok)));
    o->put((s = v4->newString(QStringLiteral("LOADING"))), (v = QV4::Primitive::fromInt32(Loading)));
    o->put((s = v4->newString(QStringLiteral("NETWORK_ERROR"))), (v = QV4::Primitive::fromInt32(NetworkError)));
    o->put((s = v4->newString(QStringLiteral("EXCEPTION"))), (v = QV4::Primitive::fromInt32(Exception)));
    o->put((s = v4->newString(QStringLiteral("status"))), (v = QV4::Primitive::fromInt32(status)));

    return o.asReturnedValue();
}

void QV4Include::callback(const QV4::Value &callback, const QV4::Value &status)
{
    if (!callback.isObject())
        return;
    QV4::ExecutionEngine *v4 = callback.as<QV4::Object>()->engine();
    QV4::Scope scope(v4);
    QV4::ScopedFunctionObject f(scope, callback);
    if (!f)
        return;

    QV4::ScopedCallData callData(scope, 1);
    callData->thisObject = v4->globalObject->asReturnedValue();
    callData->args[0] = status;
    f->call(callData);
    if (scope.hasException())
        scope.engine->catchException();
}

QV4::ReturnedValue QV4Include::result()
{
    return m_resultObject.value();
}

#define INCLUDE_MAXIMUM_REDIRECT_RECURSION 15
void QV4Include::finished()
{
    m_redirectCount++;

    if (m_redirectCount < INCLUDE_MAXIMUM_REDIRECT_RECURSION) {
        QVariant redirect = m_reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
        if (redirect.isValid()) {
            m_url = m_url.resolved(redirect.toUrl());
            delete m_reply;

            QNetworkRequest request;
            request.setUrl(m_url);

            m_reply = m_network->get(request);
            QObject::connect(m_reply, SIGNAL(finished()), this, SLOT(finished()));
            return;
        }
    }

    QV4::Scope scope(v4);
    QV4::ScopedObject resultObj(scope, m_resultObject.value());
    QV4::ScopedString status(scope, v4->newString(QStringLiteral("status")));
    if (m_reply->error() == QNetworkReply::NoError) {
        QByteArray data = m_reply->readAll();

        QString code = QString::fromUtf8(data);
        QmlIR::Document::removeScriptPragmas(code);

        QV4::ScopedObject qmlglobal(scope, m_qmlglobal.value());
        QV4::Script script(v4, qmlglobal, code, m_url.toString());

        script.parse();
        if (!scope.engine->hasException)
            script.run();
        if (scope.engine->hasException) {
            QV4::ScopedValue ex(scope, scope.engine->catchException());
            resultObj->put(status, QV4::ScopedValue(scope, QV4::Primitive::fromInt32(Exception)));
            QV4::ScopedString exception(scope, v4->newString(QStringLiteral("exception")));
            resultObj->put(exception, ex);
        } else {
            resultObj->put(status, QV4::ScopedValue(scope, QV4::Primitive::fromInt32(Ok)));
        }
    } else {
        resultObj->put(status, QV4::ScopedValue(scope, QV4::Primitive::fromInt32(NetworkError)));
    }

    QV4::ScopedValue cb(scope, m_callbackFunction.value());
    callback(cb, resultObj);

    disconnect();
    deleteLater();
}

/*
    Documented in qv8engine.cpp
*/
QV4::ReturnedValue QV4Include::method_include(QV4::CallContext *ctx)
{
    if (!ctx->argc())
        return QV4::Encode::undefined();

    QV4::Scope scope(ctx->engine());
    QQmlContextData *context = QV4::QmlContextWrapper::callingContext(scope.engine);

    if (!context || !context->isJSContext)
        V4THROW_ERROR("Qt.include(): Can only be called from JavaScript files");

    QUrl url(scope.engine->resolvedUrl(ctx->args()[0].toQStringNoThrow()));

    QV4::ScopedValue callbackFunction(scope, QV4::Primitive::undefinedValue());
    if (ctx->argc() >= 2 && ctx->args()[1].as<QV4::FunctionObject>())
        callbackFunction = ctx->args()[1];

    QString localFile = QQmlFile::urlToLocalFileOrQrc(url);

    QV4::ScopedValue result(scope);
    QV4::ScopedObject qmlcontextobject(scope, scope.engine->qmlContextObject());

    if (localFile.isEmpty()) {
        QV4Include *i = new QV4Include(url, scope.engine, context,
                                       qmlcontextobject,
                                       callbackFunction);
        result = i->result();

    } else {
        QScopedPointer<QV4::Script> script;

        if (const QQmlPrivate::CachedQmlUnit *cachedUnit = QQmlMetaType::findCachedCompilationUnit(url)) {
            QV4::CompiledData::CompilationUnit *jsUnit = cachedUnit->createCompilationUnit();
            script.reset(new QV4::Script(scope.engine, qmlcontextobject, jsUnit));
        } else {
            QFile f(localFile);

            if (f.open(QIODevice::ReadOnly)) {
                QByteArray data = f.readAll();
                QString code = QString::fromUtf8(data);
                QmlIR::Document::removeScriptPragmas(code);

                script.reset(new QV4::Script(scope.engine, qmlcontextobject, code, url.toString()));
            }
        }

        if (!script.isNull()) {
            script->parse();
            if (!scope.engine->hasException)
                script->run();
            if (scope.engine->hasException) {
                QV4::ScopedValue ex(scope, scope.engine->catchException());
                result = resultValue(scope.engine, Exception);
                QV4::ScopedString exception(scope, scope.engine->newString(QStringLiteral("exception")));
                result->as<QV4::Object>()->put(exception, ex);
            } else {
                result = resultValue(scope.engine, Ok);
            }
        } else {
            result = resultValue(scope.engine, NetworkError);
        }

        callback(callbackFunction, result);
    }

    return result->asReturnedValue();
}

QT_END_NAMESPACE