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Diffstat (limited to 'tools/designer/src/lib/shared/csshighlighter.cpp')
| -rw-r--r-- | tools/designer/src/lib/shared/csshighlighter.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/tools/designer/src/lib/shared/csshighlighter.cpp b/tools/designer/src/lib/shared/csshighlighter.cpp new file mode 100644 index 0000000..f7144c5 --- /dev/null +++ b/tools/designer/src/lib/shared/csshighlighter.cpp @@ -0,0 +1,188 @@ +/**************************************************************************** +** +** 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 "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 |