diff options
Diffstat (limited to 'src/qml/qml/qqmlscriptblob.cpp')
| -rw-r--r-- | src/qml/qml/qqmlscriptblob.cpp | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/qml/qml/qqmlscriptblob.cpp b/src/qml/qml/qqmlscriptblob.cpp new file mode 100644 index 0000000000..fa9a41e801 --- /dev/null +++ b/src/qml/qml/qqmlscriptblob.cpp @@ -0,0 +1,255 @@ +// Copyright (C) 2019 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#include <private/qqmlengine_p.h> +#include <private/qqmlirbuilder_p.h> +#include <private/qqmlscriptblob_p.h> +#include <private/qqmlscriptdata_p.h> +#include <private/qqmlsourcecoordinate_p.h> +#include <private/qqmlcontextdata_p.h> +#include <private/qv4runtimecodegen_p.h> +#include <private/qv4script_p.h> + +#include <QtCore/qloggingcategory.h> + +Q_DECLARE_LOGGING_CATEGORY(DBG_DISK_CACHE) +Q_LOGGING_CATEGORY(DBG_DISK_CACHE, "qt.qml.diskcache") + +QT_BEGIN_NAMESPACE + +QQmlScriptBlob::QQmlScriptBlob(const QUrl &url, QQmlTypeLoader *loader) + : QQmlTypeLoader::Blob(url, JavaScriptFile, loader) + , m_isModule(url.path().endsWith(QLatin1String(".mjs"))) +{ +} + +QQmlScriptBlob::~QQmlScriptBlob() +{ +} + +QQmlRefPointer<QQmlScriptData> QQmlScriptBlob::scriptData() const +{ + return m_scriptData; +} + +bool QQmlScriptBlob::isNative() const +{ + return m_scriptData && !m_scriptData->m_value.isEmpty(); +} + +void QQmlScriptBlob::dataReceived(const SourceCodeData &data) +{ + if (readCacheFile()) { + auto unit = QQml::makeRefPointer<QV4::CompiledData::CompilationUnit>(); + QString error; + if (unit->loadFromDisk(url(), data.sourceTimeStamp(), &error)) { + initializeFromCompilationUnit(std::move(unit)); + return; + } else { + qCDebug(DBG_DISK_CACHE()) << "Error loading" << urlString() << "from disk cache:" << error; + } + } + + if (!data.exists()) { + if (m_cachedUnitStatus == QQmlMetaType::CachedUnitLookupError::VersionMismatch) + setError(QQmlTypeLoader::tr("File was compiled ahead of time with an incompatible version of Qt and the original file cannot be found. Please recompile")); + else + setError(QQmlTypeLoader::tr("No such file or directory")); + return; + } + + QString error; + QString source = data.readAll(&error); + if (!error.isEmpty()) { + setError(error); + return; + } + + QQmlRefPointer<QV4::CompiledData::CompilationUnit> unit; + + if (m_isModule) { + QList<QQmlJS::DiagnosticMessage> diagnostics; + unit = QV4::Compiler::Codegen::compileModule(isDebugging(), urlString(), source, + data.sourceTimeStamp(), &diagnostics); + QList<QQmlError> errors = QQmlEnginePrivate::qmlErrorFromDiagnostics(urlString(), diagnostics); + if (!errors.isEmpty()) { + setError(errors); + return; + } + } else { + QmlIR::Document irUnit(isDebugging()); + + irUnit.jsModule.sourceTimeStamp = data.sourceTimeStamp(); + + QmlIR::ScriptDirectivesCollector collector(&irUnit); + irUnit.jsParserEngine.setDirectives(&collector); + + QList<QQmlError> errors; + irUnit.javaScriptCompilationUnit = QV4::Script::precompile( + &irUnit.jsModule, &irUnit.jsParserEngine, &irUnit.jsGenerator, urlString(), finalUrlString(), + source, &errors, QV4::Compiler::ContextType::ScriptImportedByQML); + + source.clear(); + if (!errors.isEmpty()) { + setError(errors); + return; + } + + QmlIR::QmlUnitGenerator qmlGenerator; + qmlGenerator.generate(irUnit); + unit = std::move(irUnit.javaScriptCompilationUnit); + } + + if (writeCacheFile()) { + QString errorString; + if (unit->saveToDisk(url(), &errorString)) { + QString error; + if (!unit->loadFromDisk(url(), data.sourceTimeStamp(), &error)) { + // ignore error, keep using the in-memory compilation unit. + } + } else { + qCDebug(DBG_DISK_CACHE()) << "Error saving cached version of" + << unit->fileName() << "to disk:" << errorString; + } + } + + initializeFromCompilationUnit(std::move(unit)); +} + +void QQmlScriptBlob::initializeFromCachedUnit(const QQmlPrivate::CachedQmlUnit *cachedUnit) +{ + initializeFromCompilationUnit(QQml::makeRefPointer<QV4::CompiledData::CompilationUnit>( + cachedUnit->qmlData, cachedUnit->aotCompiledFunctions, urlString(), finalUrlString())); +} + +void QQmlScriptBlob::done() +{ + if (isError()) + return; + + // Check all script dependencies for errors + for (int ii = 0; ii < m_scripts.size(); ++ii) { + const ScriptReference &script = m_scripts.at(ii); + Q_ASSERT(script.script->isCompleteOrError()); + if (script.script->isError()) { + QList<QQmlError> errors = script.script->errors(); + QQmlError error; + error.setUrl(url()); + error.setLine(qmlConvertSourceCoordinate<quint32, int>(script.location.line())); + error.setColumn(qmlConvertSourceCoordinate<quint32, int>(script.location.column())); + error.setDescription(QQmlTypeLoader::tr("Script %1 unavailable").arg(script.script->urlString())); + errors.prepend(error); + setError(errors); + return; + } + } + + if (!m_isModule) { + m_scriptData->typeNameCache.adopt(new QQmlTypeNameCache(m_importCache)); + + QSet<QString> ns; + + for (int scriptIndex = 0; scriptIndex < m_scripts.size(); ++scriptIndex) { + const ScriptReference &script = m_scripts.at(scriptIndex); + + m_scriptData->scripts.append(script.script); + + if (!script.nameSpace.isNull()) { + if (!ns.contains(script.nameSpace)) { + ns.insert(script.nameSpace); + m_scriptData->typeNameCache->add(script.nameSpace); + } + } + m_scriptData->typeNameCache->add(script.qualifier, scriptIndex, script.nameSpace); + } + + m_importCache->populateCache(m_scriptData->typeNameCache.data()); + } + m_scripts.clear(); +} + +QString QQmlScriptBlob::stringAt(int index) const +{ + return m_scriptData->m_precompiledScript->stringAt(index); +} + +void QQmlScriptBlob::scriptImported(const QQmlRefPointer<QQmlScriptBlob> &blob, const QV4::CompiledData::Location &location, const QString &qualifier, const QString &nameSpace) +{ + ScriptReference ref; + ref.script = blob; + ref.location = location; + ref.qualifier = qualifier; + ref.nameSpace = nameSpace; + + m_scripts << ref; +} + +void QQmlScriptBlob::initializeFromCompilationUnit( + QQmlRefPointer<QV4::CompiledData::CompilationUnit> &&unit) +{ + Q_ASSERT(!m_scriptData); + Q_ASSERT(unit); + + m_scriptData.adopt(new QQmlScriptData()); + m_scriptData->url = finalUrl(); + m_scriptData->urlString = finalUrlString(); + m_scriptData->m_precompiledScript = unit; + + m_importCache->setBaseUrl(finalUrl(), finalUrlString()); + + if (!m_isModule) { + QList<QQmlError> errors; + for (quint32 i = 0, count = unit->importCount(); i < count; ++i) { + const QV4::CompiledData::Import *import = unit->importAt(i); + if (!addImport(import, {}, &errors)) { + Q_ASSERT(errors.size()); + QQmlError error(errors.takeFirst()); + error.setUrl(m_importCache->baseUrl()); + error.setLine(import->location.line()); + error.setColumn(import->location.column()); + errors.prepend(error); // put it back on the list after filling out information. + setError(errors); + return; + } + } + } + + const QStringList moduleRequests = unit->moduleRequests(); + for (const QString &request: moduleRequests) { + const QUrl relativeRequest = QUrl(request); + if (m_typeLoader->injectedScript(relativeRequest)) + continue; + + const QUrl absoluteRequest = unit->finalUrl().resolved(relativeRequest); + QQmlRefPointer<QQmlScriptBlob> absoluteBlob = typeLoader()->getScript(absoluteRequest); + if (absoluteBlob->m_scriptData && absoluteBlob->m_scriptData->m_precompiledScript) + continue; + + addDependency(absoluteBlob.data()); + scriptImported( + absoluteBlob, /* ### */QV4::CompiledData::Location(), /*qualifier*/QString(), + /*namespace*/QString()); + } +} + + +/*! + \internal + + This initializes a dummy script blob from a "native" ECMAScript module. + Native modules are just JavaScript values, possibly objects with members. + + \sa QJSEngine::registerModule() + */ +void QQmlScriptBlob::initializeFromNative(const QV4::Value &value) +{ + Q_ASSERT(!m_scriptData); + m_scriptData.adopt(new QQmlScriptData()); + m_scriptData->url = finalUrl(); + m_scriptData->urlString = finalUrlString(); + m_scriptData->m_loaded = true; + m_scriptData->m_value.set(QQmlEnginePrivate::getV4Engine(typeLoader()->engine()), value); + m_importCache->setBaseUrl(finalUrl(), finalUrlString()); +} + +QT_END_NAMESPACE |