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Diffstat (limited to 'src/declarative/qml/qmlrewrite.cpp')
-rw-r--r-- | src/declarative/qml/qmlrewrite.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/declarative/qml/qmlrewrite.cpp b/src/declarative/qml/qmlrewrite.cpp new file mode 100644 index 0000000..02bf8fa --- /dev/null +++ b/src/declarative/qml/qmlrewrite.cpp @@ -0,0 +1,157 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module 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 "qmlrewrite_p.h" + +QT_BEGIN_NAMESPACE + +namespace QmlRewrite { + +QString RewriteBinding::operator()(const QString &code) +{ + Engine engine; + NodePool pool(QString(), &engine); + Lexer lexer(&engine); + Parser parser(&engine); + lexer.setCode(code, 0); + parser.parseStatement(); + return rewrite(code, 0, parser.statement()); +} + +void RewriteBinding::accept(AST::Node *node) +{ + AST::Node::acceptChild(node, this); +} + +QString RewriteBinding::rewrite(QString code, unsigned position, + AST::Statement *node) +{ + TextWriter w; + _writer = &w; + _position = position; + + accept(node); + + unsigned startOfStatement = node->firstSourceLocation().begin() - _position; + unsigned endOfStatement = node->lastSourceLocation().end() - _position; + + _writer->replace(startOfStatement, 0, QLatin1String("function() {\n")); + _writer->replace(endOfStatement, 0, QLatin1String("\n}")); + + w.write(&code); + + return code; +} + +bool RewriteBinding::visit(AST::Block *ast) +{ + for (AST::StatementList *it = ast->statements; it; it = it->next) { + if (! it->next) { + // we need to rewrite only the last statement of a block. + accept(it->statement); + } + } + + return false; +} + +bool RewriteBinding::visit(AST::ExpressionStatement *ast) +{ + unsigned startOfExpressionStatement = ast->firstSourceLocation().begin() - _position; + _writer->replace(startOfExpressionStatement, 0, QLatin1String("return ")); + + return false; +} + +bool RewriteBinding::visit(AST::NumericLiteral *node) +{ + if (node->suffix != AST::NumericLiteral::noSuffix) { + const int suffixLength = AST::NumericLiteral::suffixLength[node->suffix]; + const char *suffixSpell = AST::NumericLiteral::suffixSpell[node->suffix]; + QString pre; + pre += QLatin1String("qmlNumberFrom"); + pre += QChar(QLatin1Char(suffixSpell[0])).toUpper(); + pre += QLatin1String(&suffixSpell[1]); + pre += QLatin1Char('('); + _writer->replace(node->literalToken.begin() - _position, 0, pre); + _writer->replace(node->literalToken.end() - _position - suffixLength, + suffixLength, + QLatin1String(")")); + } + + return false; +} + +QString RewriteNumericLiterals::operator()(QString code, unsigned position, AST::Node *node) +{ + TextWriter w; + _writer = &w; + _position = position; + + AST::Node::acceptChild(node, this); + + w.write(&code); + + return code; +} + +bool RewriteNumericLiterals::visit(AST::NumericLiteral *node) +{ + if (node->suffix != AST::NumericLiteral::noSuffix) { + const int suffixLength = AST::NumericLiteral::suffixLength[node->suffix]; + const char *suffixSpell = AST::NumericLiteral::suffixSpell[node->suffix]; + QString pre; + pre += QLatin1String("qmlNumberFrom"); + pre += QChar(QLatin1Char(suffixSpell[0])).toUpper(); + pre += QLatin1String(&suffixSpell[1]); + pre += QLatin1Char('('); + _writer->replace(node->literalToken.begin() - _position, 0, pre); + _writer->replace(node->literalToken.end() - _position - suffixLength, + suffixLength, + QLatin1String(")")); + } + + return false; +} + +} // namespace QmlRewrite + +QT_END_NAMESPACE |