/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt VS Tools.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/// This file implements the actual highlighting of the text according to the
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/// classification of the syntax elements recognized by the QML parser.
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Threading.Tasks;
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using System.Windows.Threading;
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using Microsoft.VisualStudio.Text;
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using Microsoft.VisualStudio.Text.Classification;
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using Microsoft.VisualStudio.Text.Editor;
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using Microsoft.VisualStudio.Text.Tagging;
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using Microsoft.VisualStudio.Utilities;
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namespace QtVsTools.Qml.Classification
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{
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[Export(typeof(IViewTaggerProvider))]
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[ContentType("qml")]
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[TagType(typeof(ClassificationTag))]
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internal sealed class QmlSyntaxClassifierProvider : IViewTaggerProvider
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{
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[Export]
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[Name("qml")]
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[BaseDefinition("code")]
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internal static ContentTypeDefinition qmlContentType = null;
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[Export]
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[FileExtension(".qml")]
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[ContentType("qml")]
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internal static FileExtensionToContentTypeDefinition qmlFileType = null;
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[Export]
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[FileExtension(".qmlproject")]
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[ContentType("qml")]
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internal static FileExtensionToContentTypeDefinition qmlprojectFileType = null;
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[Import]
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internal IClassificationTypeRegistryService classificationTypeRegistry = null;
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public ITagger<T> CreateTagger<T>(ITextView textView, ITextBuffer buffer) where T : ITag
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{
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QmlClassificationType.InitClassificationTypes(classificationTypeRegistry);
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return new QmlSyntaxClassifier(textView, buffer) as ITagger<T>;
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}
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}
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internal sealed class QmlSyntaxClassifier : QmlAsyncClassifier<ClassificationTag>
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{
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internal QmlSyntaxClassifier(
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ITextView textView,
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ITextBuffer buffer)
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: base("Syntax", textView, buffer)
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{
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}
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protected override ClassificationRefresh ProcessText(
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ITextSnapshot snapshot,
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Parser parseResult,
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SharedTagList tagList,
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bool writeAccess)
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{
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bool parsedCorrectly = parseResult.ParsedCorrectly;
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if (writeAccess) {
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foreach (var token in parseResult.Tokens) {
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tagList.AddRange(this, QmlSyntaxTag.GetClassification(snapshot, token));
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}
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foreach (var node in parseResult.AstNodes) {
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tagList.AddRange(this, QmlSyntaxTag.GetClassification(snapshot, node));
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}
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}
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if (parsedCorrectly)
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return ClassificationRefresh.FullText;
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else
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return ClassificationRefresh.TagsOnly;
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}
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protected override ClassificationTag GetClassification(TrackingTag tag)
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{
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var syntaxTag = tag as QmlSyntaxTag;
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if (syntaxTag == null || syntaxTag.ClassificationType == null)
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return null;
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return new ClassificationTag(syntaxTag.ClassificationType);
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}
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}
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}
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