Generic highlighter: Interface for automatic download of available definitions. Refactorings and changes in related parts of the code.

1 files changed, 94 insertions, 0 deletions

diff --git a/src/plugins/texteditor/generichighlighter/definitiondownloader.cpp b/src/plugins/texteditor/generichighlighter/definitiondownloader.cpp
new file mode 100644
index 0000000000..373c16b927
--- /dev/null
+++ b/src/plugins/texteditor/generichighlighter/definitiondownloader.cpp
@@ -0,0 +1,94 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "definitiondownloader.h"
+
+#include <QtCore/QLatin1Char>
+#include <QtCore/QEventLoop>
+#include <QtCore/QFile>
+#include <QtNetwork/QNetworkAccessManager>
+#include <QtNetwork/QNetworkRequest>
+#include <QtNetwork/QNetworkReply>
+
+using namespace TextEditor;
+using namespace Internal;
+
+DefinitionDownloader::DefinitionDownloader(const QUrl &url, const QString &localPath) :
+    m_url(url), m_localPath(localPath)
+{}
+
+void DefinitionDownloader::start()
+{
+    QNetworkReply *reply;
+    QNetworkAccessManager manager;
+
+    int currentAttempt = 0;
+    const int maxAttempts = 5;
+    while (currentAttempt < maxAttempts) {
+        reply = getData(&manager);
+        if (reply->error() != QNetworkReply::NoError)
+            break;
+
+        ++currentAttempt;
+        QVariant variant = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
+        if (variant.isValid() && currentAttempt < maxAttempts) {
+            m_url = variant.toUrl();
+            delete reply;
+        } else if (!variant.isValid()) {
+            saveData(reply);
+            break;
+        }
+    }
+
+    delete reply;
+}
+
+QNetworkReply *DefinitionDownloader::getData(QNetworkAccessManager *manager) const
+{
+    QNetworkRequest request(m_url);
+    QNetworkReply *reply = manager->get(request);
+
+    QEventLoop eventLoop;
+    connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));
+    eventLoop.exec();
+
+    return reply;
+}
+
+void DefinitionDownloader::saveData(QNetworkReply *reply) const
+{
+    const QString &urlPath = m_url.path();
+    const QString &fileName =
+        urlPath.right(urlPath.length() - urlPath.lastIndexOf(QLatin1Char('/')) - 1);
+    QFile file(m_localPath + fileName);
+    if (!file.open(QIODevice::Text | QIODevice::WriteOnly))
+        return;
+    file.write(reply->readAll());
+    file.close();
+}