1// Copyright (C) 2019 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include <private/qqmlscriptdata_p.h>
5#include <private/qqmlcontext_p.h>
6#include <private/qqmlengine_p.h>
7#include <private/qqmlscriptblob_p.h>
8#include <private/qv4engine_p.h>
9#include <private/qv4scopedvalue_p.h>
10#include <private/qv4object_p.h>
11#include <private/qv4qmlcontext_p.h>
12#include <private/qv4module_p.h>
13
14QT_BEGIN_NAMESPACE
15
16QQmlScriptData::QQmlScriptData()
17 : m_loaded(false)
18{
19}
20
21QQmlRefPointer<QQmlContextData> QQmlScriptData::qmlContextDataForContext(
22 const QQmlRefPointer<QQmlContextData> &parentQmlContextData)
23{
24 Q_ASSERT(parentQmlContextData && parentQmlContextData->engine());
25
26 if (!m_precompiledScript || m_precompiledScript->isESModule())
27 return nullptr;
28
29 QQmlRefPointer<QQmlContextData> qmlContextData = m_precompiledScript->isSharedLibrary()
30 ? QQmlContextData::createRefCounted(parent: QQmlRefPointer<QQmlContextData>())
31 : QQmlContextData::createRefCounted(parent: parentQmlContextData);
32
33 qmlContextData->setInternal(true);
34 qmlContextData->setJSContext(true);
35 if (m_precompiledScript->isSharedLibrary())
36 qmlContextData->setPragmaLibraryContext(true);
37 else
38 qmlContextData->setPragmaLibraryContext(parentQmlContextData->isPragmaLibraryContext());
39 qmlContextData->setBaseUrl(url);
40 qmlContextData->setBaseUrlString(urlString);
41
42 // For backward compatibility, if there are no imports, we need to use the
43 // imports from the parent context. See QTBUG-17518.
44 if (!typeNameCache->isEmpty()) {
45 qmlContextData->setImports(typeNameCache);
46 } else if (!m_precompiledScript->isSharedLibrary()) {
47 qmlContextData->setImports(parentQmlContextData->imports());
48 qmlContextData->setImportedScripts(parentQmlContextData->importedScripts());
49 }
50
51 if (m_precompiledScript->isSharedLibrary())
52 qmlContextData->setEngine(parentQmlContextData->engine()); // Fix for QTBUG-21620
53
54 QV4::ExecutionEngine *v4 = parentQmlContextData->engine()->handle();
55 QV4::Scope scope(v4);
56 QV4::ScopedObject scriptsArray(scope);
57 if (qmlContextData->importedScripts().isNullOrUndefined()) {
58 scriptsArray = v4->newArrayObject(count: scripts.size());
59 qmlContextData->setImportedScripts(
60 QV4::PersistentValue(v4, scriptsArray.asReturnedValue()));
61 } else {
62 scriptsArray = qmlContextData->importedScripts().valueRef();
63 }
64 QV4::ScopedValue v(scope);
65 for (int ii = 0; ii < scripts.size(); ++ii) {
66 v = scripts.at(i: ii)->scriptData()->scriptValueForContext(parentCtxt: qmlContextData);
67 scriptsArray->put(idx: ii, v);
68 }
69
70 return qmlContextData;
71}
72
73QV4::ReturnedValue QQmlScriptData::scriptValueForContext(
74 const QQmlRefPointer<QQmlContextData> &parentQmlContextData)
75{
76 if (m_loaded)
77 return m_value.value();
78
79 Q_ASSERT(parentQmlContextData && parentQmlContextData->engine());
80 QV4::ExecutionEngine *v4 = parentQmlContextData->engine()->handle();
81 QV4::Scope scope(v4);
82
83 QV4::Scoped<QV4::QmlContext> qmlExecutionContext(scope);
84 if (auto qmlContextData = qmlContextDataForContext(parentQmlContextData)) {
85 qmlExecutionContext = QV4::QmlContext::create(parent: v4->rootContext(), context: std::move(qmlContextData),
86 /* scopeObject: */ scopeObject: nullptr);
87 }
88
89 QV4::Scoped<QV4::Module> module(scope, m_precompiledScript->instantiate(engine: v4));
90 if (module) {
91 if (qmlExecutionContext) {
92 module->d()->scope->outer.set(e: v4, newVal: qmlExecutionContext->d());
93 qmlExecutionContext->d()->qml()->module.set(e: v4, newVal: module->d());
94 }
95
96 module->evaluate();
97 }
98
99 if (v4->hasException) {
100 QQmlError error = v4->catchExceptionAsQmlError();
101 if (error.isValid())
102 QQmlEnginePrivate::get(e: v4)->warning(error);
103 }
104
105 QV4::ScopedValue value(scope);
106 if (qmlExecutionContext)
107 value = qmlExecutionContext->d()->qml();
108 else if (module)
109 value = module->d();
110
111 if (m_precompiledScript->isSharedLibrary() || m_precompiledScript->isESModule()) {
112 m_loaded = true;
113 m_value.set(engine: v4, value);
114 }
115
116 return value->asReturnedValue();
117}
118
119QT_END_NAMESPACE
120

source code of qtdeclarative/src/qml/qml/qqmlscriptdata.cpp