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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QTextStream>
#include "htmlhighlighter_p.h"
QT_BEGIN_NAMESPACE
namespace qdesigner_internal {
HtmlHighlighter::HtmlHighlighter(QTextEdit *textEdit)
: QSyntaxHighlighter(textEdit)
{
QTextCharFormat entityFormat;
entityFormat.setForeground(Qt::red);
setFormatFor(Entity, entityFormat);
QTextCharFormat tagFormat;
tagFormat.setForeground(Qt::darkMagenta);
tagFormat.setFontWeight(QFont::Bold);
setFormatFor(Tag, tagFormat);
QTextCharFormat commentFormat;
commentFormat.setForeground(Qt::gray);
commentFormat.setFontItalic(true);
setFormatFor(Comment, commentFormat);
QTextCharFormat attributeFormat;
attributeFormat.setForeground(Qt::black);
attributeFormat.setFontWeight(QFont::Bold);
setFormatFor(Attribute, attributeFormat);
QTextCharFormat valueFormat;
valueFormat.setForeground(Qt::blue);
setFormatFor(Value, valueFormat);
}
void HtmlHighlighter::setFormatFor(Construct construct,
const QTextCharFormat &format)
{
m_formats[construct] = format;
rehighlight();
}
void HtmlHighlighter::highlightBlock(const QString &text)
{
static const QLatin1Char tab = QLatin1Char('\t');
static const QLatin1Char space = QLatin1Char(' ');
static const QLatin1Char amp = QLatin1Char('&');
static const QLatin1Char startTag = QLatin1Char('<');
static const QLatin1Char endTag = QLatin1Char('>');
static const QLatin1Char quot = QLatin1Char('"');
static const QLatin1Char apos = QLatin1Char('\'');
static const QLatin1Char semicolon = QLatin1Char(';');
static const QLatin1Char equals = QLatin1Char('=');
static const QLatin1String startComment = QLatin1String("<!--");
static const QLatin1String endComment = QLatin1String("-->");
static const QLatin1String endElement = QLatin1String("/>");
int state = previousBlockState();
int len = text.length();
int start = 0;
int pos = 0;
while (pos < len) {
switch (state) {
case NormalState:
default:
while (pos < len) {
QChar ch = text.at(pos);
if (ch == startTag) {
if (text.mid(pos, 4) == startComment) {
state = InComment;
} else {
state = InTag;
start = pos;
while (pos < len && text.at(pos) != space
&& text.at(pos) != endTag
&& text.at(pos) != tab
&& text.mid(pos, 2) != endElement)
++pos;
if (text.mid(pos, 2) == endElement)
++pos;
setFormat(start, pos - start,
m_formats[Tag]);
break;
}
break;
} else if (ch == amp) {
start = pos;
while (pos < len && text.at(pos++) != semicolon)
;
setFormat(start, pos - start,
m_formats[Entity]);
} else {
// No tag, comment or entity started, continue...
++pos;
}
}
break;
case InComment:
start = pos;
while (pos < len) {
if (text.mid(pos, 3) == endComment) {
pos += 3;
state = NormalState;
break;
} else {
++pos;
}
}
setFormat(start, pos - start, m_formats[Comment]);
break;
case InTag:
QChar quote = QChar::Null;
while (pos < len) {
QChar ch = text.at(pos);
if (quote.isNull()) {
start = pos;
if (ch == apos || ch == quot) {
quote = ch;
} else if (ch == endTag) {
++pos;
setFormat(start, pos - start, m_formats[Tag]);
state = NormalState;
break;
} else if (text.mid(pos, 2) == endElement) {
pos += 2;
setFormat(start, pos - start, m_formats[Tag]);
state = NormalState;
break;
} else if (ch != space && text.at(pos) != tab) {
// Tag not ending, not a quote and no whitespace, so
// we must be dealing with an attribute.
++pos;
while (pos < len && text.at(pos) != space
&& text.at(pos) != tab
&& text.at(pos) != equals)
++pos;
setFormat(start, pos - start, m_formats[Attribute]);
start = pos;
}
} else if (ch == quote) {
quote = QChar::Null;
// Anything quoted is a value
setFormat(start, pos - start, m_formats[Value]);
}
++pos;
}
break;
}
}
setCurrentBlockState(state);
}
} // namespace qdesigner_internal
QT_END_NAMESPACE
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