Move rsslisting example into corelibe/serialization

The implementation of the stream-based XML parser resides in
coreslib/serialization. Moving the rsslisting example there.

Task-number: QTBUG-110647
Pick-to: 6.5
Change-Id: I862909e767301250750b6ee0d8ac7e20d6bad2b1
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

7 files changed, 0 insertions, 344 deletions

diff --git a/examples/xml/CMakeLists.txt b/examples/xml/CMakeLists.txt
index 6864435951..d97185f647 100644
--- a/examples/xml/CMakeLists.txt
+++ b/examples/xml/CMakeLists.txt
@@ -5,6 +5,3 @@ if(TARGET Qt6::Widgets)
     qt_internal_add_example(dombookmarks)
     qt_internal_add_example(streambookmarks)
 endif()
-if(TARGET Qt6::Network AND TARGET Qt6::Widgets)
-    qt_internal_add_example(rsslisting)
-endif()
diff --git a/examples/xml/rsslisting/CMakeLists.txt b/examples/xml/rsslisting/CMakeLists.txt
deleted file mode 100644
index d03979de82..0000000000
--- a/examples/xml/rsslisting/CMakeLists.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright (C) 2022 The Qt Company Ltd.
-# SPDX-License-Identifier: BSD-3-Clause
-
-cmake_minimum_required(VERSION 3.16)
-project(rsslisting LANGUAGES CXX)
-
-if(NOT DEFINED INSTALL_EXAMPLESDIR)
-    set(INSTALL_EXAMPLESDIR "examples")
-endif()
-
-set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/xml/rsslisting")
-
-find_package(Qt6 REQUIRED COMPONENTS Core Gui Network Widgets)
-
-qt_standard_project_setup()
-
-qt_add_executable(rsslisting
-    main.cpp
-    rsslisting.cpp rsslisting.h
-)
-
-set_target_properties(rsslisting PROPERTIES
-    WIN32_EXECUTABLE TRUE
-    MACOSX_BUNDLE TRUE
-)
-
-target_link_libraries(rsslisting PRIVATE
-    Qt6::Core
-    Qt6::Gui
-    Qt6::Network
-    Qt6::Widgets
-)
-
-install(TARGETS rsslisting
-    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
-    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
-    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
-)
diff --git a/examples/xml/rsslisting/main.cpp b/examples/xml/rsslisting/main.cpp
deleted file mode 100644
index 9337e5f352..0000000000
--- a/examples/xml/rsslisting/main.cpp
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-/*
-main.cpp
-
-Provides the main function for the RSS news reader example.
-*/
-
-#include <QtWidgets>
-
-#include "rsslisting.h"
-
-/*!
-    Create an application and a main widget. Open the main widget for
-    user input, and exit with an appropriate return value when it is
-    closed.
-*/
-
-int main(int argc, char **argv)
-{
-    QApplication app(argc, argv);
-    RSSListing *rsslisting = new RSSListing;
-    rsslisting->show();
-    return app.exec();
-}
diff --git a/examples/xml/rsslisting/rsslisting.cpp b/examples/xml/rsslisting/rsslisting.cpp
deleted file mode 100644
index 9269be4080..0000000000
--- a/examples/xml/rsslisting/rsslisting.cpp
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-/*
-rsslisting.cpp
-
-Provides a widget for displaying news items from RDF news sources.
-RDF is an XML-based format for storing items of information (see
-http://www.w3.org/RDF/ for details).
-
-The widget itself provides a simple user interface for specifying
-the URL of a news source, and controlling the downloading of news.
-
-The widget downloads and parses the XML asynchronously, feeding the
-data to an XML reader in pieces. This allows the user to interrupt
-its operation, and also allows very large data sources to be read.
-*/
-
-
-#include <QtCore>
-#include <QtWidgets>
-#include <QtNetwork>
-
-#include "rsslisting.h"
-
-
-/*
-    Constructs an RSSListing widget with a simple user interface, and sets
-    up the XML reader to use a custom handler class.
-
-    The user interface consists of a line edit, a push button, and a
-    list view widget. The line edit is used for entering the URLs of news
-    sources; the push button starts the process of reading the
-    news.
-*/
-
-RSSListing::RSSListing(QWidget *parent)
-    : QWidget(parent), currentReply(0)
-{
-
-    lineEdit = new QLineEdit(this);
-    lineEdit->setText("http://blog.qt.io/feed/");
-
-    fetchButton = new QPushButton(tr("Fetch"), this);
-
-    treeWidget = new QTreeWidget(this);
-    connect(treeWidget, &QTreeWidget::itemActivated,
-            this, &RSSListing::itemActivated);
-    QStringList headerLabels;
-    headerLabels << tr("Title") << tr("Link");
-    treeWidget->setHeaderLabels(headerLabels);
-    treeWidget->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
-
-    connect(&manager, &QNetworkAccessManager::finished,
-             this, &RSSListing::finished);
-
-    connect(lineEdit, &QLineEdit::returnPressed, this, &RSSListing::fetch);
-    connect(fetchButton, &QPushButton::clicked, this, &RSSListing::fetch);
-
-    QVBoxLayout *layout = new QVBoxLayout(this);
-
-    QHBoxLayout *hboxLayout = new QHBoxLayout;
-
-    hboxLayout->addWidget(lineEdit);
-    hboxLayout->addWidget(fetchButton);
-
-    layout->addLayout(hboxLayout);
-    layout->addWidget(treeWidget);
-
-    setWindowTitle(tr("RSS listing example"));
-    resize(640,480);
-}
-
-/*
-    Starts the network request and connects the needed signals
-*/
-void RSSListing::get(const QUrl &url)
-{
-    QNetworkRequest request(url);
-    if (currentReply) {
-        currentReply->disconnect(this);
-        currentReply->deleteLater();
-    }
-    currentReply = manager.get(request);
-    connect(currentReply, &QNetworkReply::readyRead, this, &RSSListing::readyRead);
-    connect(currentReply, &QNetworkReply::metaDataChanged, this, &RSSListing::metaDataChanged);
-    connect(currentReply, &QNetworkReply::errorOccurred, this, &RSSListing::error);
-}
-
-/*
-    Starts fetching data from a news source specified in the line
-    edit widget.
-
-    The line edit is made read only to prevent the user from modifying its
-    contents during the fetch; this is only for cosmetic purposes.
-    The fetch button is disabled, the list view is cleared, and we
-    define the last list view item to be 0, meaning that there are no
-    existing items in the list.
-
-    A URL is created with the raw contents of the line edit and
-    a get is initiated.
-*/
-
-void RSSListing::fetch()
-{
-    lineEdit->setReadOnly(true);
-    fetchButton->setEnabled(false);
-    treeWidget->clear();
-
-    xml.clear();
-
-    QUrl url(lineEdit->text());
-    get(url);
-}
-
-void RSSListing::metaDataChanged()
-{
-    QUrl redirectionTarget = currentReply->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl();
-    if (redirectionTarget.isValid()) {
-        get(redirectionTarget);
-    }
-}
-
-/*
-    Reads data received from the RDF source.
-
-    We read all the available data, and pass it to the XML
-    stream reader. Then we call the XML parsing function.
-*/
-
-void RSSListing::readyRead()
-{
-    int statusCode = currentReply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
-    if (statusCode >= 200 && statusCode < 300) {
-        QByteArray data = currentReply->readAll();
-        xml.addData(data);
-        parseXml();
-    }
-}
-
-/*
-    Finishes processing an HTTP request.
-
-    The default behavior is to keep the text edit read only.
-
-    If an error has occurred, the user interface is made available
-    to the user for further input, allowing a new fetch to be
-    started.
-
-    If the HTTP get request has finished, we make the
-    user interface available to the user for further input.
-*/
-
-void RSSListing::finished(QNetworkReply *reply)
-{
-    Q_UNUSED(reply);
-    lineEdit->setReadOnly(false);
-    fetchButton->setEnabled(true);
-}
-
-
-/*
-    Parses the XML data and creates treeWidget items accordingly.
-*/
-void RSSListing::parseXml()
-{
-    while (!xml.atEnd()) {
-        xml.readNext();
-        if (xml.isStartElement()) {
-            if (xml.name() == u"item")
-                linkString = xml.attributes().value("rss:about").toString();
-            currentTag = xml.name().toString();
-        } else if (xml.isEndElement()) {
-            if (xml.name() == u"item") {
-
-                QTreeWidgetItem *item = new QTreeWidgetItem;
-                item->setText(0, titleString);
-                item->setText(1, linkString);
-                treeWidget->addTopLevelItem(item);
-
-                titleString.clear();
-                linkString.clear();
-            }
-
-        } else if (xml.isCharacters() && !xml.isWhitespace()) {
-            if (currentTag == "title")
-                titleString += xml.text();
-            else if (currentTag == "link")
-                linkString += xml.text();
-        }
-    }
-    if (xml.error() && xml.error() != QXmlStreamReader::PrematureEndOfDocumentError) {
-        qWarning() << "XML ERROR:" << xml.lineNumber() << ": " << xml.errorString();
-    }
-}
-
-/*
-    Open the link in the browser
-*/
-void RSSListing::itemActivated(QTreeWidgetItem * item)
-{
-    QDesktopServices::openUrl(QUrl(item->text(1)));
-}
-
-void RSSListing::error(QNetworkReply::NetworkError)
-{
-    qWarning("error retrieving RSS feed");
-    currentReply->disconnect(this);
-    currentReply->deleteLater();
-    currentReply = 0;
-}
diff --git a/examples/xml/rsslisting/rsslisting.h b/examples/xml/rsslisting/rsslisting.h
deleted file mode 100644
index 81c655f677..0000000000
--- a/examples/xml/rsslisting/rsslisting.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef RSSLISTING_H
-#define RSSLISTING_H
-
-#include <QNetworkAccessManager>
-#include <QNetworkReply>
-#include <QWidget>
-#include <QBuffer>
-#include <QXmlStreamReader>
-#include <QUrl>
-
-
-QT_BEGIN_NAMESPACE
-class QLineEdit;
-class QTreeWidget;
-class QTreeWidgetItem;
-class QPushButton;
-QT_END_NAMESPACE
-
-class RSSListing : public QWidget
-{
-    Q_OBJECT
-public:
-    RSSListing(QWidget *widget = nullptr);
-
-public slots:
-    void fetch();
-    void finished(QNetworkReply *reply);
-    void readyRead();
-    void metaDataChanged();
-    void itemActivated(QTreeWidgetItem * item);
-    void error(QNetworkReply::NetworkError);
-
-private:
-    void parseXml();
-    void get(const QUrl &url);
-
-    QXmlStreamReader xml;
-    QString currentTag;
-    QString linkString;
-    QString titleString;
-
-    QNetworkAccessManager manager;
-    QNetworkReply *currentReply;
-
-    QLineEdit *lineEdit;
-    QTreeWidget *treeWidget;
-    QPushButton *fetchButton;
-
-};
-
-#endif
-
diff --git a/examples/xml/rsslisting/rsslisting.pro b/examples/xml/rsslisting/rsslisting.pro
deleted file mode 100644
index c84347c15e..0000000000
--- a/examples/xml/rsslisting/rsslisting.pro
+++ /dev/null
@@ -1,8 +0,0 @@
-HEADERS += rsslisting.h
-SOURCES += main.cpp rsslisting.cpp
-QT += network widgets
-requires(qtConfig(treewidget))
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/xml/rsslisting
-INSTALLS += target
diff --git a/examples/xml/xml.pro b/examples/xml/xml.pro
index 4a2caa1648..991d5a69d2 100644
--- a/examples/xml/xml.pro
+++ b/examples/xml/xml.pro
@@ -3,7 +3,4 @@ TEMPLATE      = subdirs
 qtHaveModule(widgets) {
     SUBDIRS +=  dombookmarks \
                 streambookmarks
-
-    qtHaveModule(network): SUBDIRS += \
-                rsslisting
 }