Qt Reference Documentation

main.cpp Example File

xml/htmlinfo/main.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
 **     of its contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtCore>

 void parseHtmlFile(QTextStream &out, const QString &fileName) {
     QFile file(fileName);

     out << "Analysis of HTML file: " << fileName << endl;

     if (!file.open(QIODevice::ReadOnly)) {
         out << "  Couldn't open the file." << endl << endl << endl;
         return;
     }

     QXmlStreamReader reader(&file);

     int paragraphCount = 0;
     QStringList links;
     QString title;
     while (!reader.atEnd()) {
         reader.readNext();
         if (reader.isStartElement()) {
             if (reader.name() == "title")
                 title = reader.readElementText();
             else if(reader.name() == "a")
                 links.append(reader.attributes().value("href").toString());
             else if(reader.name() == "p")
                 ++paragraphCount;
         }
     }

     if (reader.hasError()) {
         out << "  The HTML file isn't well-formed: " << reader.errorString()
             << endl << endl << endl;
         return;
     }

     out << "  Title: \"" << title << "\"" << endl
         << "  Number of paragraphs: " << paragraphCount << endl
         << "  Number of links: " << links.size() << endl
         << "  Showing first few links:" << endl;

     while(links.size() > 5)
         links.removeLast();

     foreach(QString link, links)
         out << "    " << link << endl;
     out << endl << endl;
 }

 int main(int argc, char **argv)
 {
     // initialize QtCore application
     QCoreApplication app(argc, argv);

     // get a list of all html files in the current directory
     QStringList filter;
     filter << "*.htm";
     filter << "*.html";

     QStringList htmlFiles = QDir(":/").entryList(filter, QDir::Files);

     QTextStream out(stdout);

     if (htmlFiles.isEmpty()) {
         out << "No html files available.";
         return 1;
     }

     // parse each html file and write the result to file/stream
     foreach(QString file, htmlFiles)
         parseHtmlFile(out, ":/" + file);

     return 0;
 }