Move shell example from QtScript to QtDeclarative.

The example is interesting as debugging tool too.

Change-Id: I9ba69a85f21b776bbfcc65469c8a0e90426f21fd
Reviewed-on: http://codereview.qt.nokia.com/2495
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>

examples/declarative/declarative.pro

@@ -6,7 +6,8 @@ SUBDIRS = \
    minehunt \
    modelviews \
    painteditem \
-   tutorials
+   tutorials \
+   script
 
 # plugins uses a 'Time' class that conflicts with symbian e32std.h also defining a class of the same name
 symbian:SUBDIRS -= plugins

examples/declarative/script/script.pro

@@ -0,0 +1,4 @@
+TEMPLATE = subdirs
+
+SUBDIRS = \
+   shell

examples/declarative/script/shell/main.cpp

@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtCore/qfile.h>
+#include <QtCore/qtextstream.h>
+#include <QtCore/qstringlist.h>
+#include <QtCore/qscopedpointer.h>
+
+#include <QtGui/qapplication.h>
+
+#include <QtDeclarative/qjsengine.h>
+
+#include <stdlib.h>
+
+
+class CommandInterface : public QObject
+{
+    Q_OBJECT
+public:
+    Q_INVOKABLE void quit() { m_wantsToQuit = true; }
+    static bool wantsToQuit() { return m_wantsToQuit; }
+private:
+    static bool m_wantsToQuit;
+};
+
+bool CommandInterface::m_wantsToQuit = false;
+
+
+static void interactive(QJSEngine *eng)
+{
+    QTextStream qin(stdin, QFile::ReadOnly);
+    const char *prompt = "qs> ";
+
+    forever {
+        QString line;
+
+        printf("%s", prompt);
+        fflush(stdout);
+
+        line = qin.readLine();
+        if (line.isNull())
+            break;
+
+        if (line.trimmed().isEmpty())
+            continue;
+
+        line += QLatin1Char('\n');
+
+        QJSValue result = eng->evaluate(line, QLatin1String("typein"));
+
+        fprintf(stderr, "%s\n", qPrintable(result.toString()));
+
+        if (CommandInterface::wantsToQuit())
+            break;
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    QScopedPointer<QJSEngine> eng(new QJSEngine());
+    {
+        QJSValue globalObject = eng->globalObject();
+        QJSValue interface = eng->newQObject(new CommandInterface);
+        globalObject.setProperty("qt", interface);
+    }
+
+    if (! *++argv) {
+        interactive(eng.data());
+        return EXIT_SUCCESS;
+    }
+
+    while (const char *arg = *argv++) {
+        QString fileName = QString::fromLocal8Bit(arg);
+
+        if (fileName == QLatin1String("-i")) {
+            interactive(eng.data());
+            break;
+        }
+
+        QString contents;
+        int lineNumber = 1;
+
+        if (fileName == QLatin1String("-")) {
+            QTextStream stream(stdin, QFile::ReadOnly);
+            contents = stream.readAll();
+        } else {
+            QFile file(fileName);
+            if (file.open(QFile::ReadOnly)) {
+                QTextStream stream(&file);
+                contents = stream.readAll();
+                file.close();
+
+                // strip off #!/usr/bin/env qjs line
+                if (contents.startsWith("#!")) {
+                    contents.remove(0, contents.indexOf("\n"));
+                    ++lineNumber;
+                }
+            }
+        }
+
+        if (contents.isEmpty())
+            continue;
+
+        QJSValue result = eng->evaluate(contents, fileName, lineNumber);
+        if (eng->hasUncaughtException()) {
+            fprintf (stderr, "    %s\n\n", qPrintable(result.toString()));
+            return EXIT_FAILURE;
+        }
+    }
+
+    return EXIT_SUCCESS;
+}
+
+#include <main.moc>

examples/declarative/script/shell/shell.pro

@@ -0,0 +1,8 @@
+QT += declarative
+
+win32: CONFIG += console
+mac:CONFIG -= app_bundle
+symbian: CONFIG += qt_example
+
+SOURCES += main.cpp
+