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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "csshighlighter_p.h"
QT_BEGIN_NAMESPACE
namespace qdesigner_internal {
CssHighlighter::CssHighlighter(QTextDocument *document)
: QSyntaxHighlighter(document)
{
}
void CssHighlighter::highlightBlock(const QString& text)
{
enum Token { ALNUM, LBRACE, RBRACE, COLON, SEMICOLON, COMMA, QUOTE, SLASH, STAR };
static const int transitions[10][9] = {
{ Selector, Property, Selector, Pseudo, Property, Selector, Quote, MaybeComment, Selector }, // Selector
{ Property, Property, Selector, Value, Property, Property, Quote, MaybeComment, Property }, // Property
{ Value, Property, Selector, Value, Property, Value, Quote, MaybeComment, Value }, // Value
{ Pseudo1, Property, Selector, Pseudo2, Selector, Selector, Quote, MaybeComment, Pseudo }, // Pseudo
{ Pseudo1, Property, Selector, Pseudo, Selector, Selector, Quote, MaybeComment, Pseudo1 }, // Pseudo1
{ Pseudo2, Property, Selector, Pseudo, Selector, Selector, Quote, MaybeComment, Pseudo2 }, // Pseudo2
{ Quote, Quote, Quote, Quote, Quote, Quote, -1, Quote, Quote }, // Quote
{ -1, -1, -1, -1, -1, -1, -1, -1, Comment }, // MaybeComment
{ Comment, Comment, Comment, Comment, Comment, Comment, Comment, Comment, MaybeCommentEnd }, // Comment
{ Comment, Comment, Comment, Comment, Comment, Comment, Comment, -1, MaybeCommentEnd } // MaybeCommentEnd
};
int lastIndex = 0;
bool lastWasSlash = false;
int state = previousBlockState(), save_state;
if (state == -1) {
// As long as the text is empty, leave the state undetermined
if (text.isEmpty()) {
setCurrentBlockState(-1);
return;
}
// The initial state is based on the precense of a : and the absense of a {.
// This is because Qt style sheets support both a full stylesheet as well as
// an inline form with just properties.
state = save_state = (text.indexOf(QLatin1Char(':')) > -1 &&
text.indexOf(QLatin1Char('{')) == -1) ? Property : Selector;
} else {
save_state = state>>16;
state &= 0x00ff;
}
if (state == MaybeCommentEnd) {
state = Comment;
} else if (state == MaybeComment) {
state = save_state;
}
for (int i = 0; i < text.length(); i++) {
int token = ALNUM;
const QChar c = text.at(i);
const char a = c.toAscii();
if (state == Quote) {
if (a == '\\') {
lastWasSlash = true;
} else {
if (a == '\"' && !lastWasSlash) {
token = QUOTE;
}
lastWasSlash = false;
}
} else {
switch (a) {
case '{': token = LBRACE; break;
case '}': token = RBRACE; break;
case ':': token = COLON; break;
case ';': token = SEMICOLON; break;
case ',': token = COMMA; break;
case '\"': token = QUOTE; break;
case '/': token = SLASH; break;
case '*': token = STAR; break;
default: break;
}
}
int new_state = transitions[state][token];
if (new_state != state) {
bool include_token = new_state == MaybeCommentEnd || (state == MaybeCommentEnd && new_state!= Comment)
|| state == Quote;
highlight(text, lastIndex, i-lastIndex+include_token, state);
if (new_state == Comment) {
lastIndex = i-1; // include the slash and star
} else {
lastIndex = i + ((token == ALNUM || new_state == Quote) ? 0 : 1);
}
}
if (new_state == -1) {
state = save_state;
} else if (state <= Pseudo2) {
save_state = state;
state = new_state;
} else {
state = new_state;
}
}
highlight(text, lastIndex, text.length() - lastIndex, state);
setCurrentBlockState(state + (save_state<<16));
}
void CssHighlighter::highlight(const QString &text, int start, int length, int state)
{
if (start >= text.length() || length <= 0)
return;
QTextCharFormat format;
switch (state) {
case Selector:
setFormat(start, length, Qt::darkRed);
break;
case Property:
setFormat(start, length, Qt::blue);
break;
case Value:
setFormat(start, length, Qt::black);
break;
case Pseudo1:
setFormat(start, length, Qt::darkRed);
break;
case Pseudo2:
setFormat(start, length, Qt::darkRed);
break;
case Quote:
setFormat(start, length, Qt::darkMagenta);
break;
case Comment:
case MaybeCommentEnd:
format.setForeground(Qt::darkGreen);
setFormat(start, length, format);
break;
default:
break;
}
}
} // namespace qdesigner_internal
QT_END_NAMESPACE
|
