mirror of
https://github.com/tomahawk-player/tomahawk.git
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157 lines
4.5 KiB
C++
157 lines
4.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) Qxt Foundation. Some rights reserved.
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**
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** This file is part of the QxtWeb module of the Qxt library.
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**
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** This library is free software; you can redistribute it and/or modify it
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** under the terms of the Common Public License, version 1.0, as published
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** by IBM, and/or under the terms of the GNU Lesser General Public License,
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** version 2.1, as published by the Free Software Foundation.
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**
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** This file is provided "AS IS", without WARRANTIES OR CONDITIONS OF ANY
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** KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
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** WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR
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** FITNESS FOR A PARTICULAR PURPOSE.
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**
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** You should have received a copy of the CPL and the LGPL along with this
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** file. See the LICENSE file and the cpl1.0.txt/lgpl-2.1.txt files
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** included with the source distribution for more information.
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** If you did not receive a copy of the licenses, contact the Qxt Foundation.
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**
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** <http://libqxt.org> <foundation@libqxt.org>
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**
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****************************************************************************/
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/*!
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\class QxtHtmlTemplate
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\inmodule QxtWeb
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\brief The QxtHtmlTemplate class provides a basic HTML template engine
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open a file containing html code and php style variables.
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use the square bracket operators to assign content for a variable
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\code
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QxtHtmlTemplate index;
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if(!index.open)
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return 404;
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index["content"]="hello world";
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echo()<<index.render();
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\endcode
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the realatet html code would look like:
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\code
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<html>
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<head>
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<title>Test Page</title>
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</head>
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<?=content?>
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</html>
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\endcode
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funny storry: whe are using this class to make our documentation (eat your own dogfood, you know ;).
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but when we where parsing exactly this file you read right now the first time, QxtHtmlTemplate got stuck in an infinite loop. guess why. becouse of that example above :D
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So be warned: when you assign content to a variable that contains the variable name itself, render() will never return.
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*/
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/*!
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\fn QxtHtmlTemplate::open(const QString& filename)
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Opens \a filename. Returns \c true on success and \c false on failure.
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Note that it will also return false for an empty html file.
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*/
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/*!
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\fn QString QxtHtmlTemplate::render() const
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Uses the variables you set and renders the opened file.
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returns an empty string on failure.
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Does NOT take care of not assigned variables, they will remain in the returned string
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*/
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#include "qxthtmltemplate.h"
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#include <QFile>
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#include <QStringList>
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/*!
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Constructs a new QxtHtmlTemplate.
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*/
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QxtHtmlTemplate::QxtHtmlTemplate() : QMap<QString, QString>()
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{}
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/*!
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Loads data \a d.
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*/
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void QxtHtmlTemplate::load(const QString& d)
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{
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data = d;
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}
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bool QxtHtmlTemplate::open(const QString& filename)
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{
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QFile f(filename);
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f.open(QIODevice::ReadOnly);
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data = QString::fromLocal8Bit(f.readAll());
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f.close();
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if (data.isEmpty())
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{
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qWarning("QxtHtmlTemplate::open(\"%s\") empty or nonexistent", qPrintable(filename));
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return false;
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}
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return true;
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}
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QString QxtHtmlTemplate::render() const
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{
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///try to preserve indention by parsing char by char and saving the last non-space character
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QString output = data;
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int lastnewline = 0;
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for (int i = 0;i < output.count();i++)
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{
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if (output.at(i) == '\n')
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{
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lastnewline = i;
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}
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if (output.at(i) == '<' && output.at(i + 1) == '?' && output.at(i + 2) == '=')
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{
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int j = i + 3;
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QString var;
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for (int jj = j;jj < output.count();jj++)
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{
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if (output.at(jj) == '?' && output.at(jj + 1) == '>')
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{
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j = jj;
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break;
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}
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var += output.at(jj);
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}
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if (j == i)
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{
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qWarning("QxtHtmlTemplate::render() unterminated <?= ");
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continue;
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}
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if (!contains(var))
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{
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qWarning("QxtHtmlTemplate::render() unused variable \"%s\"", qPrintable(var));
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continue;
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}
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output.replace(i, j - i + 2, QString(value(var)).replace('\n', '\n' + QString(i - lastnewline - 1, QChar(' '))));
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}
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}
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return output;
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}
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