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Diffstat (limited to 'examples/script/qscript/main.cpp')
| -rw-r--r-- | examples/script/qscript/main.cpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/examples/script/qscript/main.cpp b/examples/script/qscript/main.cpp new file mode 100644 index 0000000..891c89f --- /dev/null +++ b/examples/script/qscript/main.cpp @@ -0,0 +1,221 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples 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 <qscriptengine.h> + +#include <QtCore/QFile> +#include <QtCore/QTextStream> +#include <QtCore/QStringList> +#include <QtGui/QApplication> + +#include <stdlib.h> + +#include "bytearrayclass.h" + +static bool wantsToQuit; + +static QScriptValue qtscript_quit(QScriptContext *ctx, QScriptEngine *eng) +{ + Q_UNUSED(ctx); + wantsToQuit = true; + return eng->undefinedValue(); +} + +static void interactive(QScriptEngine *eng) +{ + QScriptValue global = eng->globalObject(); + QScriptValue quitFunction = eng->newFunction(qtscript_quit); + if (!global.property(QLatin1String("exit")).isValid()) + global.setProperty(QLatin1String("exit"), quitFunction); + if (!global.property(QLatin1String("quit")).isValid()) + global.setProperty(QLatin1String("quit"), quitFunction); + wantsToQuit = false; + + QTextStream qin(stdin, QFile::ReadOnly); + + const char *qscript_prompt = "qs> "; + const char *dot_prompt = ".... "; + const char *prompt = qscript_prompt; + + QString code; + + forever { + QString line; + + printf("%s", prompt); + fflush(stdout); + + line = qin.readLine(); + if (line.isNull()) + break; + + code += line; + code += QLatin1Char('\n'); + + if (line.trimmed().isEmpty()) { + continue; + + } else if (! eng->canEvaluate(code)) { + prompt = dot_prompt; + + } else { + QScriptValue result = eng->evaluate(code, QLatin1String("typein")); + + code.clear(); + prompt = qscript_prompt; + + if (! result.isUndefined()) + fprintf(stderr, "%s\n", qPrintable(result.toString())); + + if (wantsToQuit) + break; + } + } +} + +static QScriptValue importExtension(QScriptContext *context, QScriptEngine *engine) +{ + return engine->importExtension(context->argument(0).toString()); +} + +static QScriptValue loadScripts(QScriptContext *context, QScriptEngine *engine) +{ + for (int i = 0; i < context->argumentCount(); ++i) { + QString fileName = context->argument(0).toString(); + QFile file(fileName); + if (!file.open(QIODevice::ReadOnly)) + return context->throwError(QString::fromLatin1("could not open %0 for reading").arg(fileName)); + QTextStream ts(&file); + QString contents = ts.readAll(); + file.close(); + QScriptContext *pc = context->parentContext(); + context->setActivationObject(pc->activationObject()); + context->setThisObject(pc->thisObject()); + QScriptValue ret = engine->evaluate(contents); + if (engine->hasUncaughtException()) + return ret; + } + return engine->undefinedValue(); +} + +int main(int argc, char *argv[]) +{ + QApplication *app; + if (argc >= 2 && !qstrcmp(argv[1], "-tty")) { + ++argv; + --argc; + app = new QApplication(argc, argv, QApplication::Tty); + } else { + app = new QApplication(argc, argv); + } + + QScriptEngine *eng = new QScriptEngine(); + + QScriptValue globalObject = eng->globalObject(); + + globalObject.setProperty("load", eng->newFunction(loadScripts, /*length=*/1)); + + { + if (!globalObject.property("qt").isObject()) + globalObject.setProperty("qt", eng->newObject()); + QScriptValue qscript = eng->newObject(); + qscript.setProperty("importExtension", eng->newFunction(importExtension)); + globalObject.property("qt").setProperty("script", qscript); + } + + ByteArrayClass *byteArrayClass = new ByteArrayClass(eng); + globalObject.setProperty("ByteArray", byteArrayClass->constructor()); + + if (! *++argv) { + interactive(eng); + return EXIT_SUCCESS; + } + + while (const char *arg = *argv++) { + QString fn = QString::fromLocal8Bit(arg); + + if (fn == QLatin1String("-i")) { + interactive(eng); + break; + } + + QString contents; + int lineNumber = 1; + + if (fn == QLatin1String("-")) { + QTextStream stream(stdin, QFile::ReadOnly); + contents = stream.readAll(); + } + + else { + QFile file(fn); + + if (file.open(QFile::ReadOnly)) { + QTextStream stream(&file); + contents = stream.readAll(); + file.close(); + + // strip off #!/usr/bin/env qscript line + if (contents.startsWith("#!")) { + contents.remove(0, contents.indexOf("\n")); + ++lineNumber; + } + } + } + + if (contents.isEmpty()) + continue; + + QScriptValue r = eng->evaluate(contents, fn, lineNumber); + if (eng->hasUncaughtException()) { + QStringList backtrace = eng->uncaughtExceptionBacktrace(); + fprintf (stderr, " %s\n%s\n\n", qPrintable(r.toString()), + qPrintable(backtrace.join("\n"))); + return EXIT_FAILURE; + } + } + + delete eng; + delete app; + + return EXIT_SUCCESS; +} |