diff options
Diffstat (limited to 'src/qml/qml/qqmlscriptblob.cpp')
| -rw-r--r-- | src/qml/qml/qqmlscriptblob.cpp | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/qml/qml/qqmlscriptblob.cpp b/src/qml/qml/qqmlscriptblob.cpp new file mode 100644 index 0000000000..eb103dc434 --- /dev/null +++ b/src/qml/qml/qqmlscriptblob.cpp @@ -0,0 +1,263 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQml 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qqmlengine_p.h> +#include <private/qqmlirbuilder_p.h> +#include <private/qqmlscriptblob_p.h> +#include <private/qqmlscriptdata_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; +} + +void QQmlScriptBlob::dataReceived(const SourceCodeData &data) +{ + if (diskCacheEnabled()) { + QQmlRefPointer<QV4::ExecutableCompilationUnit> unit + = QV4::ExecutableCompilationUnit::create(); + QString error; + if (unit->loadFromDisk(url(), data.sourceTimeStamp(), &error)) { + initializeFromCompilationUnit(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; + } + + 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); + } + + auto executableUnit = QV4::ExecutableCompilationUnit::create(std::move(unit)); + + if (diskCacheEnabled()) { + QString errorString; + if (executableUnit->saveToDisk(url(), &errorString)) { + QString error; + if (!executableUnit->loadFromDisk(url(), data.sourceTimeStamp(), &error)) { + // ignore error, keep using the in-memory compilation unit. + } + } else { + qCDebug(DBG_DISK_CACHE()) << "Error saving cached version of" + << executableUnit->fileName() << "to disk:" << errorString; + } + } + + initializeFromCompilationUnit(executableUnit); +} + +void QQmlScriptBlob::initializeFromCachedUnit(const QV4::CompiledData::Unit *unit) +{ + initializeFromCompilationUnit(QV4::ExecutableCompilationUnit::create( + QV4::CompiledData::CompilationUnit(unit, urlString(), finalUrlString()))); +} + +void QQmlScriptBlob::done() +{ + if (isError()) + return; + + // Check all script dependencies for errors + for (int ii = 0; ii < m_scripts.count(); ++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(script.location.line); + error.setColumn(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.count(); ++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(const QQmlRefPointer<QV4::ExecutableCompilationUnit> &unit) +{ + Q_ASSERT(!m_scriptData); + m_scriptData.adopt(new QQmlScriptData()); + m_scriptData->url = finalUrl(); + m_scriptData->urlString = finalUrlString(); + m_scriptData->m_precompiledScript = unit; + + m_importCache.setBaseUrl(finalUrl(), finalUrlString()); + + QQmlRefPointer<QV4::ExecutableCompilationUnit> script = m_scriptData->m_precompiledScript; + + if (!m_isModule) { + QList<QQmlError> errors; + for (quint32 i = 0, count = script->importCount(); i < count; ++i) { + const QV4::CompiledData::Import *import = script->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; + } + } + } + + auto *v4 = QQmlEnginePrivate::getV4Engine(typeLoader()->engine()); + + v4->injectModule(unit); + + for (const QString &request: unit->moduleRequests()) { + if (v4->moduleForUrl(QUrl(request), unit.data())) + continue; + + const QUrl absoluteRequest = unit->finalUrl().resolved(QUrl(request)); + QQmlRefPointer<QQmlScriptBlob> blob = typeLoader()->getScript(absoluteRequest); + addDependency(blob.data()); + scriptImported(blob, /* ### */QV4::CompiledData::Location(), /*qualifier*/QString(), /*namespace*/QString()); + } +} + +QT_END_NAMESPACE |