[844] | 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the QtDeclarative module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "private/qdeclarativerewrite_p.h"
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| 43 |
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| 44 | #include "private/qdeclarativeglobal_p.h"
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| 45 |
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| 46 | #include <QtCore/qdebug.h>
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| 47 |
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| 48 | QT_BEGIN_NAMESPACE
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| 49 |
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| 50 | DEFINE_BOOL_CONFIG_OPTION(rewriteDump, QML_REWRITE_DUMP);
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| 51 |
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| 52 | namespace QDeclarativeRewrite {
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| 53 |
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| 54 | bool SharedBindingTester::isSharable(const QString &code)
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| 55 | {
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| 56 | Engine engine;
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| 57 | NodePool pool(QString(), &engine);
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| 58 | Lexer lexer(&engine);
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| 59 | Parser parser(&engine);
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| 60 | lexer.setCode(code, 0);
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| 61 | parser.parseStatement();
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| 62 | if (!parser.statement())
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| 63 | return false;
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| 64 |
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| 65 | _sharable = true;
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| 66 | AST::Node::acceptChild(parser.statement(), this);
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| 67 | return _sharable;
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| 68 | }
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| 69 |
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| 70 | QString RewriteBinding::operator()(const QString &code, bool *ok)
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| 71 | {
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| 72 | Engine engine;
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| 73 | NodePool pool(QString(), &engine);
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| 74 | Lexer lexer(&engine);
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| 75 | Parser parser(&engine);
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| 76 | lexer.setCode(code, 0);
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| 77 | parser.parseStatement();
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| 78 | if (!parser.statement()) {
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| 79 | if (ok) *ok = false;
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| 80 | return QString();
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| 81 | } else {
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| 82 | if (ok) *ok = true;
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| 83 | }
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| 84 | return rewrite(code, 0, parser.statement());
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| 85 | }
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| 86 |
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| 87 | void RewriteBinding::accept(AST::Node *node)
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| 88 | {
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| 89 | AST::Node::acceptChild(node, this);
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| 90 | }
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| 91 |
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| 92 | QString RewriteBinding::rewrite(QString code, unsigned position,
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| 93 | AST::Statement *node)
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| 94 | {
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| 95 | TextWriter w;
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| 96 | _writer = &w;
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| 97 | _position = position;
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| 98 | _inLoop = 0;
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| 99 |
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| 100 | accept(node);
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| 101 |
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| 102 | unsigned startOfStatement = node->firstSourceLocation().begin() - _position;
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| 103 | unsigned endOfStatement = node->lastSourceLocation().end() - _position;
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| 104 |
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| 105 | _writer->replace(startOfStatement, 0, QLatin1String("(function ") + QString::fromUtf8(_name) + QLatin1String("() { "));
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| 106 | _writer->replace(endOfStatement, 0, QLatin1String(" })"));
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| 107 |
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| 108 | if (rewriteDump()) {
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| 109 | qWarning() << "=============================================================";
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| 110 | qWarning() << "Rewrote:";
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| 111 | qWarning() << qPrintable(code);
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| 112 | }
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| 113 |
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| 114 | w.write(&code);
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| 115 |
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| 116 | if (rewriteDump()) {
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| 117 | qWarning() << "To:";
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| 118 | qWarning() << qPrintable(code);
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| 119 | qWarning() << "=============================================================";
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| 120 | }
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| 121 |
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| 122 | return code;
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| 123 | }
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| 124 |
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| 125 | bool RewriteBinding::visit(AST::Block *ast)
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| 126 | {
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| 127 | for (AST::StatementList *it = ast->statements; it; it = it->next) {
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| 128 | if (! it->next) {
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| 129 | // we need to rewrite only the last statement of a block.
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| 130 | accept(it->statement);
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| 131 | }
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| 132 | }
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| 133 |
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| 134 | return false;
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| 135 | }
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| 136 |
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| 137 | bool RewriteBinding::visit(AST::ExpressionStatement *ast)
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| 138 | {
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| 139 | if (! _inLoop) {
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| 140 | unsigned startOfExpressionStatement = ast->firstSourceLocation().begin() - _position;
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| 141 | _writer->replace(startOfExpressionStatement, 0, QLatin1String("return "));
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| 142 | }
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| 143 |
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| 144 | return false;
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| 145 | }
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| 146 |
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| 147 | bool RewriteBinding::visit(AST::DoWhileStatement *)
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| 148 | {
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| 149 | ++_inLoop;
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| 150 | return true;
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| 151 | }
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| 152 |
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| 153 | void RewriteBinding::endVisit(AST::DoWhileStatement *)
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| 154 | {
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| 155 | --_inLoop;
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| 156 | }
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| 157 |
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| 158 | bool RewriteBinding::visit(AST::WhileStatement *)
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| 159 | {
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| 160 | ++_inLoop;
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| 161 | return true;
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| 162 | }
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| 163 |
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| 164 | void RewriteBinding::endVisit(AST::WhileStatement *)
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| 165 | {
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| 166 | --_inLoop;
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| 167 | }
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| 168 |
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| 169 | bool RewriteBinding::visit(AST::ForStatement *)
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| 170 | {
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| 171 | ++_inLoop;
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| 172 | return true;
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| 173 | }
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| 174 |
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| 175 | void RewriteBinding::endVisit(AST::ForStatement *)
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| 176 | {
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| 177 | --_inLoop;
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| 178 | }
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| 179 |
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| 180 | bool RewriteBinding::visit(AST::LocalForStatement *)
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| 181 | {
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| 182 | ++_inLoop;
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| 183 | return true;
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| 184 | }
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| 185 |
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| 186 | void RewriteBinding::endVisit(AST::LocalForStatement *)
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| 187 | {
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| 188 | --_inLoop;
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| 189 | }
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| 190 |
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| 191 | bool RewriteBinding::visit(AST::ForEachStatement *)
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| 192 | {
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| 193 | ++_inLoop;
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| 194 | return true;
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| 195 | }
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| 196 |
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| 197 | void RewriteBinding::endVisit(AST::ForEachStatement *)
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| 198 | {
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| 199 | --_inLoop;
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| 200 | }
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| 201 |
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| 202 | bool RewriteBinding::visit(AST::LocalForEachStatement *)
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| 203 | {
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| 204 | ++_inLoop;
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| 205 | return true;
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| 206 | }
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| 207 |
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| 208 | void RewriteBinding::endVisit(AST::LocalForEachStatement *)
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| 209 | {
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| 210 | --_inLoop;
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| 211 | }
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| 212 |
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| 213 | } // namespace QDeclarativeRewrite
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| 214 |
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| 215 | QT_END_NAMESPACE
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