| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:FDL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in a
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| 14 | ** written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Free Documentation License
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Free
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| 18 | ** Documentation License version 1.3 as published by the Free Software
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| 19 | ** Foundation and appearing in the file included in the packaging of this
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| 20 | ** file.
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| 21 | **
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| 22 | ** If you have questions regarding the use of this file, please contact
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| 23 | ** Nokia at [email protected].
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| 24 | ** $QT_END_LICENSE$
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| 25 | **
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| 26 | ****************************************************************************/
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| 27 |
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| 28 | /*!
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| 29 | \example xml/htmlinfo
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| 30 | \title XML HTML Info Example
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| 31 |
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| 32 | The XML HTML Info example provides a simple command line utility that
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| 33 | scans the current directory for HTML files and prints statistics about
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| 34 | them to standard out.
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| 35 |
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| 36 | \note Standard out is redirected on some platforms. On Symbian using Open
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| 37 | C \c stdout is by default directed to the console window, but this window
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| 38 | may not always be visible. To redirect to a file instead, locate the \c
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| 39 | c:\\system\\data\\config.ini file (on either the emulator or the device)
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| 40 | and change \c STDOUT to point to \c MEDIA4. This will redirect the console
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| 41 | to \c c:\\system\\data\\out.txt.
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| 42 |
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| 43 | The files are parsed using a QXmlStreamReader object. If the file does
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| 44 | not contain a well-formed XML document, a description of the error is
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| 45 | printed to the standard error console.
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| 46 |
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| 47 | \section1 Basic Operation
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| 48 |
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| 49 | The main function of the example uses QDir to access files in the current
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| 50 | directory that match either "*.htm" or "*.html". For each file found,
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| 51 | the \c parseHtmlFile() function is called.
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| 52 |
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| 53 | Reading XML is handled by an instance of the QXmlStreamReader class, which
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| 54 | operates on the input file object:
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| 55 |
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| 56 | \snippet examples/xml/htmlinfo/main.cpp 0
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| 57 |
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| 58 | The work of parsing and the XML and extracting statistics is done in a
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| 59 | while loop, and is driven by input from the reader:
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| 60 |
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| 61 | \snippet examples/xml/htmlinfo/main.cpp 1
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| 62 |
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| 63 | If more input is available, the next token from the input file is read
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| 64 | and parsed. The program then looks for the specific element types,
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| 65 | "title", "a", and "p", and stores information about them.
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| 66 |
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| 67 | When there is no more input, the loop terminates. If an error occurred,
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| 68 | information is written to the standard out file via a stream, and the
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| 69 | example exits:
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| 70 |
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| 71 | \snippet examples/xml/htmlinfo/main.cpp 2
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| 72 |
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| 73 | If no error occurred, the example prints some statistics from the data
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| 74 | gathered in the loop, and then exits.
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| 75 | */
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