qqmlbuiltinfunctions.cpp 46 KB
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/****************************************************************************
**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the QtQml module of the Qt Toolkit.
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**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
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**
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** $QT_END_LICENSE$
**
****************************************************************************/

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#include "qqmlbuiltinfunctions_p.h"
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#include <QtQml/qqmlcomponent.h>
#include <private/qqmlengine_p.h>
#include <private/qqmlcomponent_p.h>
#include <private/qqmlstringconverters_p.h>
#include <private/qqmllocale_p.h>
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#include <private/qv8engine_p.h>
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#include <private/qjsconverter_impl_p.h>
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#include <private/qv8profilerservice_p.h>
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#include <private/qqmlprofilerservice_p.h>
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#include <QtCore/qstring.h>
#include <QtCore/qdatetime.h>
#include <QtCore/qcryptographichash.h>
#include <QtCore/qrect.h>
#include <QtCore/qsize.h>
#include <QtCore/qpoint.h>
#include <QtCore/qurl.h>
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#include <QtCore/qfile.h>
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#include <QtCore/qcoreapplication.h>

#include <QtGui/qcolor.h>
#include <QtGui/qvector3d.h>
#include <QtGui/qvector4d.h>
#include <QtGui/qdesktopservices.h>
#include <QtGui/qfontdatabase.h>

QT_BEGIN_NAMESPACE

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namespace QQmlBuiltinFunctions {
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enum ConsoleLogTypes {
    Log,
    Warn,
    Error
};
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static void jsContext(v8::Handle<v8::Value> *file, int *line, v8::Handle<v8::Value> *function) {
    v8::Local<v8::StackTrace> stackTrace = v8::StackTrace::CurrentStackTrace(1);
    if (stackTrace->GetFrameCount()) {
        v8::Local<v8::StackFrame> frame = stackTrace->GetFrame(0);
        *file = frame->GetScriptName();
        *line = frame->GetLineNumber();
        *function = frame->GetFunctionName();
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    }
}

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static QString jsStack() {
    QStringList stackFrames;

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    //The v8 default is currently 10 stack frames.
    v8::Handle<v8::StackTrace> stackTrace =
        v8::StackTrace::CurrentStackTrace(10, v8::StackTrace::kOverview);
    int stackCount = stackTrace->GetFrameCount();

    for (int i = 0; i < stackCount; i++) {
        v8::Local<v8::StackFrame> frame = stackTrace->GetFrame(i);
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        v8::Handle<v8::String> function(frame->GetFunctionName());
        v8::Handle<v8::String> script(frame->GetScriptName());
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        int lineNumber = frame->GetLineNumber();
        int columnNumber = frame->GetColumn();
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        QString stackFrame =
                QString::fromLatin1("%1 (%2:%3:%4)").arg(QJSConverter::toString(function),
                                                         QJSConverter::toString(script),
                                                         QString::number(lineNumber),
                                                         QString::number(columnNumber));
        stackFrames.append(stackFrame);
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    }
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    return stackFrames.join(QLatin1String("\n"));
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}

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v8::Handle<v8::Value> console(ConsoleLogTypes logType, const v8::Arguments &args,
                              bool printStack = false)
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{
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    v8::HandleScope handleScope;

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    QString result;
    for (int i = 0; i < args.Length(); ++i) {
        if (i != 0)
            result.append(QLatin1Char(' '));

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        v8::Local<v8::Value> value = args[i];
        //Check for Object Type
        if (value->IsObject() && !value->IsFunction()
                && !value->IsArray() && !value->IsDate()
                && !value->IsRegExp()) {
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            result.append(QLatin1String("Object"));
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        } else {
            v8::Local<v8::String> jsstr = value->ToString();
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            QString tmp = V8ENGINE()->toString(jsstr);
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            if (value->IsArray())
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                result.append(QString::fromLatin1("[%1]").arg(tmp));
            else
                result.append(tmp);
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        }
    }
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    if (printStack) {
        result.append(QLatin1String("\n"));
        result.append(jsStack());
    }

    v8::Handle<v8::Value> fileHandle;
    v8::Handle<v8::Value> functionHandle;
    int line;

    jsContext(&fileHandle, &line, &functionHandle);
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    switch (logType) {
    case Log:
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        QMessageLogger(*v8::String::AsciiValue(fileHandle), line,
                       *v8::String::AsciiValue(functionHandle)).debug("%s", qPrintable(result));
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        break;
    case Warn:
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        QMessageLogger(*v8::String::AsciiValue(fileHandle), line,
                       *v8::String::AsciiValue(functionHandle)).warning("%s", qPrintable(result));
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        break;
    case Error:
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        QMessageLogger(*v8::String::AsciiValue(fileHandle), line,
                       *v8::String::AsciiValue(functionHandle)).critical("%s", qPrintable(result));
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        break;
    default:
        break;
    }

    return v8::Undefined();
}

v8::Handle<v8::Value> gc(const v8::Arguments &args)
{
    Q_UNUSED(args);
    QV8Engine::gc();
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    return v8::Undefined();
}

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v8::Handle<v8::Value> consoleError(const v8::Arguments &args)
{
    return console(Error, args);
}

v8::Handle<v8::Value> consoleLog(const v8::Arguments &args)
{
    //console.log
    //console.debug
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    //console.info
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    //print
    return console(Log, args);
}

v8::Handle<v8::Value> consoleProfile(const v8::Arguments &args)
{
    //DeclarativeDebugTrace cannot handle nested profiling
    //although v8 can handle several profiling at once,
    //we do not allow that. Hence, we pass an empty(default) title
    Q_UNUSED(args);
    QString title;

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    v8::Handle<v8::Value> file;
    v8::Handle<v8::Value> function;
    int line;
    jsContext(&file, &line, &function);

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    if (QQmlProfilerService::startProfiling()) {
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        QV8ProfilerService::instance()->startProfiling(title);
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        QMessageLogger(*v8::String::AsciiValue(file), line,
                       *v8::String::AsciiValue(function)).debug("Profiling started.");
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    } else {
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        QMessageLogger(*v8::String::AsciiValue(file), line,
                       *v8::String::AsciiValue(function)).warning(
                    "Profiling is already in progress. First, end current profiling session.");
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    }

    return v8::Undefined();
}

v8::Handle<v8::Value> consoleProfileEnd(const v8::Arguments &args)
{
    //DeclarativeDebugTrace cannot handle nested profiling
    //although v8 can handle several profiling at once,
    //we do not allow that. Hence, we pass an empty(default) title
    Q_UNUSED(args);
    QString title;

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    v8::Handle<v8::Value> file;
    v8::Handle<v8::Value> function;
    int line;
    jsContext(&file, &line, &function);

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    if (QQmlProfilerService::stopProfiling()) {
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        QV8ProfilerService *profiler = QV8ProfilerService::instance();
        profiler->stopProfiling(title);
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        QQmlProfilerService::sendProfilingData();
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        profiler->sendProfilingData();
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        QMessageLogger(*v8::String::AsciiValue(file), line,
                       *v8::String::AsciiValue(function)).debug("Profiling ended.");
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    } else {
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        QMessageLogger(*v8::String::AsciiValue(file), line,
                       *v8::String::AsciiValue(function)).warning("Profiling was not started.");
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    }

    return v8::Undefined();
}

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v8::Handle<v8::Value> consoleTime(const v8::Arguments &args)
{
    if (args.Length() != 1)
        V8THROW_ERROR("console.time(): Invalid arguments");
    QString name = V8ENGINE()->toString(args[0]);
    V8ENGINE()->startTimer(name);
    return v8::Undefined();
}

v8::Handle<v8::Value> consoleTimeEnd(const v8::Arguments &args)
{
    if (args.Length() != 1)
        V8THROW_ERROR("console.time(): Invalid arguments");
    QString name = V8ENGINE()->toString(args[0]);
    bool wasRunning;
    qint64 elapsed = V8ENGINE()->stopTimer(name, &wasRunning);
    if (wasRunning) {
        qDebug("%s: %llims", qPrintable(name), elapsed);
    }
    return v8::Undefined();
}

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v8::Handle<v8::Value> consoleCount(const v8::Arguments &args)
{
    // first argument: name to print. Ignore any additional arguments
    QString name;
    if (args.Length() > 0)
        name = V8ENGINE()->toString(args[0]);

    v8::Handle<v8::StackTrace> stackTrace =
        v8::StackTrace::CurrentStackTrace(1, v8::StackTrace::kOverview);

    if (stackTrace->GetFrameCount()) {
        v8::Local<v8::StackFrame> frame = stackTrace->GetFrame(0);

        QString scriptName = V8ENGINE()->toString(frame->GetScriptName());
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        QString functionName = V8ENGINE()->toString(frame->GetFunctionName());
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        int line = frame->GetLineNumber();
        int column = frame->GetColumn();

        int value = V8ENGINE()->consoleCountHelper(scriptName, line, column);
        QString message = name + QLatin1String(": ") + QString::number(value);
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        QMessageLogger(qPrintable(scriptName), line,
                       qPrintable(functionName)).debug("%s", qPrintable(message));
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    }

    return v8::Undefined();
}

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v8::Handle<v8::Value> consoleTrace(const v8::Arguments &args)
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{
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    if (args.Length() != 0)
        V8THROW_ERROR("console.trace(): Invalid arguments");

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    QString stack = jsStack();

    v8::Handle<v8::Value> file;
    v8::Handle<v8::Value> function;
    int line;
    jsContext(&file, &line, &function);

    QMessageLogger(*v8::String::AsciiValue(file), line, *v8::String::AsciiValue(function)).debug(
                "%s", qPrintable(stack));
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    return v8::Undefined();
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}

v8::Handle<v8::Value> consoleWarn(const v8::Arguments &args)
{
    return console(Warn, args);
}

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v8::Handle<v8::Value> consoleAssert(const v8::Arguments &args)
{
    if (args.Length() == 0)
        V8THROW_ERROR("console.assert(): Missing argument");

    if (!args[0]->ToBoolean()->Value()) {
        QString message;
        for (int i = 1; i < args.Length(); ++i) {
            if (i != 1)
                message.append(QLatin1Char(' '));

            v8::Local<v8::Value> value = args[i];
            message.append(V8ENGINE()->toString(value->ToString()));
        }

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        QString stack = jsStack();

        v8::Handle<v8::Value> file;
        v8::Handle<v8::Value> function;
        int line;
        jsContext(&file, &line, &function);

        QMessageLogger(*v8::String::AsciiValue(file), line, *v8::String::AsciiValue(function)).critical(
                    "%s\n%s", qPrintable(message), qPrintable(stack));

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    }
    return v8::Undefined();
}

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v8::Handle<v8::Value> consoleException(const v8::Arguments &args)
{
    if (args.Length() == 0)
        V8THROW_ERROR("console.exception(): Missing argument");
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    console(Error, args, true);
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    return v8::Undefined();
}

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v8::Handle<v8::Value> stringArg(const v8::Arguments &args)
{
    QString value = V8ENGINE()->toString(args.This()->ToString());
    if (args.Length() != 1)
        V8THROW_ERROR("String.arg(): Invalid arguments");

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    v8::Handle<v8::Value> arg = args[0];
    if (arg->IsUint32())
        return V8ENGINE()->toString(value.arg(arg->Uint32Value()));
    else if (arg->IsInt32())
        return V8ENGINE()->toString(value.arg(arg->Int32Value()));
    else if (arg->IsNumber())
        return V8ENGINE()->toString(value.arg(arg->NumberValue()));
    else if (arg->IsBoolean())
        return V8ENGINE()->toString(value.arg(arg->BooleanValue()));

    return V8ENGINE()->toString(value.arg(V8ENGINE()->toString(arg)));
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}
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/*!
\qmlmethod bool Qt::isQtObject(object)
Returns true if \c object is a valid reference to a Qt or QML object, otherwise false.
*/
v8::Handle<v8::Value> isQtObject(const v8::Arguments &args)
{
    if (args.Length() == 0)
        return v8::Boolean::New(false);

    return v8::Boolean::New(0 != V8ENGINE()->toQObject(args[0]));
}

/*!
\qmlmethod color Qt::rgba(real red, real green, real blue, real alpha)

Returns a color with the specified \c red, \c green, \c blue and \c alpha components.
All components should be in the range 0-1 inclusive.
*/
v8::Handle<v8::Value> rgba(const v8::Arguments &args)
{
    int argCount = args.Length();
    if (argCount < 3 || argCount > 4)
        V8THROW_ERROR("Qt.rgba(): Invalid arguments");

    double r = args[0]->NumberValue();
    double g = args[1]->NumberValue();
    double b = args[2]->NumberValue();
    double a = (argCount == 4) ? args[3]->NumberValue() : 1;

    if (r < 0.0) r=0.0;
    if (r > 1.0) r=1.0;
    if (g < 0.0) g=0.0;
    if (g > 1.0) g=1.0;
    if (b < 0.0) b=0.0;
    if (b > 1.0) b=1.0;
    if (a < 0.0) a=0.0;
    if (a > 1.0) a=1.0;

    return V8ENGINE()->fromVariant(QVariant::fromValue(QColor::fromRgbF(r, g, b, a)));
}

/*!
\qmlmethod color Qt::hsla(real hue, real saturation, real lightness, real alpha)

Returns a color with the specified \c hue, \c saturation, \c lightness and \c alpha components.
All components should be in the range 0-1 inclusive.
*/
v8::Handle<v8::Value> hsla(const v8::Arguments &args)
{
    int argCount = args.Length();
    if (argCount < 3 || argCount > 4)
        V8THROW_ERROR("Qt.hsla(): Invalid arguments");

    double h = args[0]->NumberValue();
    double s = args[1]->NumberValue();
    double l = args[2]->NumberValue();
    double a = (argCount == 4) ? args[3]->NumberValue() : 1;

    if (h < 0.0) h=0.0;
    if (h > 1.0) h=1.0;
    if (s < 0.0) s=0.0;
    if (s > 1.0) s=1.0;
    if (l < 0.0) l=0.0;
    if (l > 1.0) l=1.0;
    if (a < 0.0) a=0.0;
    if (a > 1.0) a=1.0;

    return V8ENGINE()->fromVariant(QVariant::fromValue(QColor::fromHslF(h, s, l, a)));
}

/*!
\qmlmethod rect Qt::rect(int x, int y, int width, int height)

Returns a \c rect with the top-left corner at \c x, \c y and the specified \c width and \c height.

The returned object has \c x, \c y, \c width and \c height attributes with the given values.
*/
v8::Handle<v8::Value> rect(const v8::Arguments &args)
{
    if (args.Length() != 4)
        V8THROW_ERROR("Qt.rect(): Invalid arguments");

    double x = args[0]->NumberValue();
    double y = args[1]->NumberValue();
    double w = args[2]->NumberValue();
    double h = args[3]->NumberValue();

    return V8ENGINE()->fromVariant(QVariant::fromValue(QRectF(x, y, w, h)));
}

/*!
\qmlmethod point Qt::point(int x, int y)
Returns a Point with the specified \c x and \c y coordinates.
*/
v8::Handle<v8::Value> point(const v8::Arguments &args)
{
    if (args.Length() != 2)
        V8THROW_ERROR("Qt.point(): Invalid arguments");

    double x = args[0]->ToNumber()->Value();
    double y = args[1]->ToNumber()->Value();

    return V8ENGINE()->fromVariant(QVariant::fromValue(QPointF(x, y)));
}

/*!
\qmlmethod Qt::size(int width, int height)
Returns a Size with the specified \c width and \c height.
*/
v8::Handle<v8::Value> size(const v8::Arguments &args)
{
    if (args.Length() != 2)
        V8THROW_ERROR("Qt.size(): Invalid arguments");

    double w = args[0]->ToNumber()->Value();
    double h = args[1]->ToNumber()->Value();

    return V8ENGINE()->fromVariant(QVariant::fromValue(QSizeF(w, h)));
}

/*!
\qmlmethod Qt::vector3d(real x, real y, real z)
Returns a Vector3D with the specified \c x, \c y and \c z.
*/
v8::Handle<v8::Value> vector3d(const v8::Arguments &args)
{
    if (args.Length() != 3)
        V8THROW_ERROR("Qt.vector(): Invalid arguments");

    double x = args[0]->ToNumber()->Value();
    double y = args[1]->ToNumber()->Value();
    double z = args[2]->ToNumber()->Value();

    return V8ENGINE()->fromVariant(QVariant::fromValue(QVector3D(x, y, z)));
}

/*!
\qmlmethod Qt::vector4d(real x, real y, real z, real w)
Returns a Vector4D with the specified \c x, \c y, \c z and \c w.
*/
v8::Handle<v8::Value> vector4d(const v8::Arguments &args)
{
    if (args.Length() != 4)
        V8THROW_ERROR("Qt.vector4d(): Invalid arguments");

    double x = args[0]->NumberValue();
    double y = args[1]->NumberValue();
    double z = args[2]->NumberValue();
    double w = args[3]->NumberValue();

    return V8ENGINE()->fromVariant(QVariant::fromValue(QVector4D(x, y, z, w)));
}

/*!
\qmlmethod color Qt::lighter(color baseColor, real factor)
Returns a color lighter than \c baseColor by the \c factor provided.

If the factor is greater than 1.0, this functions returns a lighter color.
Setting factor to 1.5 returns a color that is 50% brighter. If the factor is less than 1.0,
the return color is darker, but we recommend using the Qt.darker() function for this purpose.
If the factor is 0 or negative, the return value is unspecified.

The function converts the current RGB color to HSV, multiplies the value (V) component
by factor and converts the color back to RGB.

If \c factor is not supplied, returns a color 50% lighter than \c baseColor (factor 1.5).
*/
v8::Handle<v8::Value> lighter(const v8::Arguments &args)
{
    if (args.Length() != 1 && args.Length() != 2)
        V8THROW_ERROR("Qt.lighter(): Invalid arguments");

    QColor color;
    QVariant v = V8ENGINE()->toVariant(args[0], -1);
    if (v.userType() == QVariant::Color) {
        color = v.value<QColor>();
    } else if (v.userType() == QVariant::String) {
        bool ok = false;
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        color = QQmlStringConverters::colorFromString(v.toString(), &ok);
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        if (!ok) {
            return v8::Null();
        }
    } else {
        return v8::Null();
    }

    qreal factor = 1.5;
    if (args.Length() == 2)
        factor = args[1]->ToNumber()->Value();

    color = color.lighter(int(qRound(factor*100.)));
    return V8ENGINE()->fromVariant(QVariant::fromValue(color));
}

/*!
\qmlmethod color Qt::darker(color baseColor, real factor)
Returns a color darker than \c baseColor by the \c factor provided.

If the factor is greater than 1.0, this function returns a darker color.
Setting factor to 3.0 returns a color that has one-third the brightness.
If the factor is less than 1.0, the return color is lighter, but we recommend using
the Qt.lighter() function for this purpose. If the factor is 0 or negative, the return
value is unspecified.

The function converts the current RGB color to HSV, divides the value (V) component
by factor and converts the color back to RGB.

If \c factor is not supplied, returns a color 50% darker than \c baseColor (factor 2.0).
*/
v8::Handle<v8::Value> darker(const v8::Arguments &args)
{
    if (args.Length() != 1 && args.Length() != 2)
        V8THROW_ERROR("Qt.darker(): Invalid arguments");

    QColor color;
    QVariant v = V8ENGINE()->toVariant(args[0], -1);
    if (v.userType() == QVariant::Color) {
        color = v.value<QColor>();
    } else if (v.userType() == QVariant::String) {
        bool ok = false;
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        color = QQmlStringConverters::colorFromString(v.toString(), &ok);
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        if (!ok) {
            return v8::Null();
        }
    } else {
        return v8::Null();
    }

    qreal factor = 2.0;
    if (args.Length() == 2)
        factor = args[1]->ToNumber()->Value();

    color = color.darker(int(qRound(factor*100.)));
    return V8ENGINE()->fromVariant(QVariant::fromValue(color));
}

/*!
    \qmlmethod color Qt::tint(color baseColor, color tintColor)
    This function allows tinting one color with another.

    The tint color should usually be mostly transparent, or you will not be
    able to see the underlying color. The below example provides a slight red
    tint by having the tint color be pure red which is only 1/16th opaque.

    \qml
    Item {
        Rectangle {
            x: 0; width: 80; height: 80
            color: "lightsteelblue"
        }
        Rectangle {
            x: 100; width: 80; height: 80
            color: Qt.tint("lightsteelblue", "#10FF0000")
        }
    }
    \endqml
    \image declarative-rect_tint.png

    Tint is most useful when a subtle change is intended to be conveyed due to some event; you can then use tinting to more effectively tune the visible color.
*/
v8::Handle<v8::Value> tint(const v8::Arguments &args)
{
    if (args.Length() != 2)
        V8THROW_ERROR("Qt.tint(): Invalid arguments");

    // base color
    QColor color;
    QVariant v = V8ENGINE()->toVariant(args[0], -1);
    if (v.userType() == QVariant::Color) {
        color = v.value<QColor>();
    } else if (v.userType() == QVariant::String) {
        bool ok = false;
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        color = QQmlStringConverters::colorFromString(v.toString(), &ok);
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        if (!ok) {
            return v8::Null();
        }
    } else {
        return v8::Null();
    }

    // tint color
    QColor tintColor;
    v = V8ENGINE()->toVariant(args[1], -1);
    if (v.userType() == QVariant::Color) {
        tintColor = v.value<QColor>();
    } else if (v.userType() == QVariant::String) {
        bool ok = false;
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        tintColor = QQmlStringConverters::colorFromString(v.toString(), &ok);
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        if (!ok) {
            return v8::Null();
        }
    } else {
        return v8::Null();
    }

    // tint the base color and return the final color
    QColor finalColor;
    int a = tintColor.alpha();
    if (a == 0xFF)
        finalColor = tintColor;
    else if (a == 0x00)
        finalColor = color;
    else {
        qreal a = tintColor.alphaF();
        qreal inv_a = 1.0 - a;

        finalColor.setRgbF(tintColor.redF() * a + color.redF() * inv_a,
                           tintColor.greenF() * a + color.greenF() * inv_a,
                           tintColor.blueF() * a + color.blueF() * inv_a,
                           a + inv_a * color.alphaF());
    }

    return V8ENGINE()->fromVariant(QVariant::fromValue(finalColor));
}

/*!
\qmlmethod string Qt::formatDate(datetime date, variant format)

Returns a string representation of \c date, optionally formatted according
to \c format.

The \a date parameter may be a JavaScript \c Date object, a \l{date}{date}
property, a QDate, or QDateTime value. The \a format parameter may be any of
the possible format values as described for
\l{QML:Qt::formatDateTime()}{Qt.formatDateTime()}.

If \a format is not specified, \a date is formatted using
\l {Qt::DefaultLocaleShortDate}{Qt.DefaultLocaleShortDate}.
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*/
v8::Handle<v8::Value> formatDate(const v8::Arguments &args)
{
    if (args.Length() < 1 || args.Length() > 2)
        V8THROW_ERROR("Qt.formatDate(): Invalid arguments");

    Qt::DateFormat enumFormat = Qt::DefaultLocaleShortDate;
    QDate date = V8ENGINE()->toVariant(args[0], -1).toDateTime().date();
    QString formattedDate;
    if (args.Length() == 2) {
        if (args[1]->IsString()) {
            QString format = V8ENGINE()->toVariant(args[1], -1).toString();
            formattedDate = date.toString(format);
        } else if (args[1]->IsNumber()) {
            quint32 intFormat = args[1]->ToNumber()->Value();
            Qt::DateFormat format = Qt::DateFormat(intFormat);
            formattedDate = date.toString(format);
        } else {
            V8THROW_ERROR("Qt.formatDate(): Invalid date format");
        }
    } else {
         formattedDate = date.toString(enumFormat);
    }

    return V8ENGINE()->fromVariant(QVariant::fromValue(formattedDate));
}

/*!
\qmlmethod string Qt::formatTime(datetime time, variant format)

Returns a string representation of \c time, optionally formatted according to
\c format.

The \a time parameter may be a JavaScript \c Date object, a QTime, or QDateTime
value. The \a format parameter may be any of the possible format values as
described for \l{QML:Qt::formatDateTime()}{Qt.formatDateTime()}.

If \a format is not specified, \a time is formatted using
\l {Qt::DefaultLocaleShortDate}{Qt.DefaultLocaleShortDate}.
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*/
v8::Handle<v8::Value> formatTime(const v8::Arguments &args)
{
    if (args.Length() < 1 || args.Length() > 2)
        V8THROW_ERROR("Qt.formatTime(): Invalid arguments");

    QVariant argVariant = V8ENGINE()->toVariant(args[0], -1);
    QTime time;
    if (args[0]->IsDate() || (argVariant.type() == QVariant::String))
        time = argVariant.toDateTime().time();
    else // if (argVariant.type() == QVariant::Time), or invalid.
        time = argVariant.toTime();

    Qt::DateFormat enumFormat = Qt::DefaultLocaleShortDate;
    QString formattedTime;
    if (args.Length() == 2) {
        if (args[1]->IsString()) {
            QString format = V8ENGINE()->toVariant(args[1], -1).toString();
            formattedTime = time.toString(format);
        } else if (args[1]->IsNumber()) {
            quint32 intFormat = args[1]->ToNumber()->Value();
            Qt::DateFormat format = Qt::DateFormat(intFormat);
            formattedTime = time.toString(format);
        } else {
            V8THROW_ERROR("Qt.formatTime(): Invalid time format");
        }
    } else {
         formattedTime = time.toString(enumFormat);
    }

    return V8ENGINE()->fromVariant(QVariant::fromValue(formattedTime));
}

/*!
\qmlmethod string Qt::formatDateTime(datetime dateTime, variant format)

Returns a string representation of \c datetime, optionally formatted according to
\c format.

The \a date parameter may be a JavaScript \c Date object, a \l{date}{date}
property, a QDate, QTime, or QDateTime value.

If \a format is not provided, \a dateTime is formatted using
\l {Qt::DefaultLocaleShortDate}{Qt.DefaultLocaleShortDate}. Otherwise,
\a format should be either:

\list
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\li One of the Qt::DateFormat enumeration values, such as
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   \c Qt.DefaultLocaleShortDate or \c Qt.ISODate
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\li A string that specifies the format of the returned string, as detailed below.
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\endlist

If \a format specifies a format string, it should use the following expressions
to specify the date:

    \table
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    \header \li Expression \li Output
    \row \li d \li the day as number without a leading zero (1 to 31)
    \row \li dd \li the day as number with a leading zero (01 to 31)
    \row \li ddd
            \li the abbreviated localized day name (e.g. 'Mon' to 'Sun').
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            Uses QDate::shortDayName().
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    \row \li dddd
            \li the long localized day name (e.g. 'Monday' to 'Qt::Sunday').
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            Uses QDate::longDayName().
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    \row \li M \li the month as number without a leading zero (1-12)
    \row \li MM \li the month as number with a leading zero (01-12)
    \row \li MMM
            \li the abbreviated localized month name (e.g. 'Jan' to 'Dec').
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            Uses QDate::shortMonthName().
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    \row \li MMMM
            \li the long localized month name (e.g. 'January' to 'December').
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            Uses QDate::longMonthName().
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    \row \li yy \li the year as two digit number (00-99)
    \row \li yyyy \li the year as four digit number
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    \endtable

In addition the following expressions can be used to specify the time:

    \table
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    \header \li Expression \li Output
    \row \li h
         \li the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
    \row \li hh
         \li the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
    \row \li m \li the minute without a leading zero (0 to 59)
    \row \li mm \li the minute with a leading zero (00 to 59)
    \row \li s \li the second without a leading zero (0 to 59)
    \row \li ss \li the second with a leading zero (00 to 59)
    \row \li z \li the milliseconds without leading zeroes (0 to 999)
    \row \li zzz \li the milliseconds with leading zeroes (000 to 999)
    \row \li AP
            \li use AM/PM display. \e AP will be replaced by either "AM" or "PM".
    \row \li ap
            \li use am/pm display. \e ap will be replaced by either "am" or "pm".
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    \endtable

    All other input characters will be ignored. Any sequence of characters that
    are enclosed in single quotes will be treated as text and not be used as an
    expression. Two consecutive single quotes ("''") are replaced by a single quote
    in the output.

For example, if the following date/time value was specified:

    \code
    // 21 May 2001 14:13:09
    var dateTime = new Date(2001, 5, 21, 14, 13, 09)
    \endcode

This \a dateTime value could be passed to \c Qt.formatDateTime(),
\l {QML:Qt::formatDate()}{Qt.formatDate()} or \l {QML:Qt::formatTime()}{Qt.formatTime()}
with the \a format values below to produce the following results:

    \table
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    \header \li Format \li Result
    \row \li "dd.MM.yyyy"      \li 21.05.2001
    \row \li "ddd MMMM d yy"   \li Tue May 21 01
    \row \li "hh:mm:ss.zzz"    \li 14:13:09.042
    \row \li "h:m:s ap"        \li 2:13:9 pm
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    \endtable
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*/
v8::Handle<v8::Value> formatDateTime(const v8::Arguments &args)
{
    if (args.Length() < 1 || args.Length() > 2)
        V8THROW_ERROR("Qt.formatDateTime(): Invalid arguments");

    Qt::DateFormat enumFormat = Qt::DefaultLocaleShortDate;
    QDateTime dt = V8ENGINE()->toVariant(args[0], -1).toDateTime();
    QString formattedDt;
    if (args.Length() == 2) {
        if (args[1]->IsString()) {
            QString format = V8ENGINE()->toVariant(args[1], -1).toString();
            formattedDt = dt.toString(format);
        } else if (args[1]->IsNumber()) {
            quint32 intFormat = args[1]->ToNumber()->Value();
            Qt::DateFormat format = Qt::DateFormat(intFormat);
            formattedDt = dt.toString(format);
        } else {
            V8THROW_ERROR("Qt.formatDateTime(): Invalid datetime format");
        }
    } else {
         formattedDt = dt.toString(enumFormat);
    }

    return V8ENGINE()->fromVariant(QVariant::fromValue(formattedDt));
}

/*!
\qmlmethod bool Qt::openUrlExternally(url target)
Attempts to open the specified \c target url in an external application, based on the user's desktop preferences. Returns true if it succeeds, and false otherwise.
*/
v8::Handle<v8::Value> openUrlExternally(const v8::Arguments &args)
{
    if (args.Length() != 1)
        return V8ENGINE()->fromVariant(false);

    bool ret = false;
#ifndef QT_NO_DESKTOPSERVICES
    ret = QDesktopServices::openUrl(V8ENGINE()->toVariant(resolvedUrl(args), -1).toUrl());
#endif
    return V8ENGINE()->fromVariant(ret);
}

/*!
  \qmlmethod url Qt::resolvedUrl(url url)
  Returns \a url resolved relative to the URL of the caller.
*/
v8::Handle<v8::Value> resolvedUrl(const v8::Arguments &args)
{
    QUrl url = V8ENGINE()->toVariant(args[0], -1).toUrl();
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    QQmlEngine *e = V8ENGINE()->engine();
    QQmlEnginePrivate *p = 0;
    if (e) p = QQmlEnginePrivate::get(e);
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    if (p) {
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        QQmlContextData *ctxt = V8ENGINE()->callingContext();
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        if (ctxt)
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            return V8ENGINE()->toString(ctxt->resolvedUrl(url).toString());
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        else
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            return V8ENGINE()->toString(url.toString());
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    }

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    return V8ENGINE()->toString(e->baseUrl().resolved(url).toString());
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}

/*!
\qmlmethod list<string> Qt::fontFamilies()
Returns a list of the font families available to the application.
*/
v8::Handle<v8::Value> fontFamilies(const v8::Arguments &args)
{
    if (args.Length() != 0)
        V8THROW_ERROR("Qt.fontFamilies(): Invalid arguments");

    QFontDatabase database;
    return V8ENGINE()->fromVariant(database.families());
}

/*!
\qmlmethod string Qt::md5(data)
Returns a hex string of the md5 hash of \c data.
*/
v8::Handle<v8::Value> md5(const v8::Arguments &args)
{
    if (args.Length() != 1)
        V8THROW_ERROR("Qt.md5(): Invalid arguments");

    QByteArray data = V8ENGINE()->toString(args[0]->ToString()).toUtf8();
    QByteArray result = QCryptographicHash::hash(data, QCryptographicHash::Md5);
    return V8ENGINE()->toString(QLatin1String(result.toHex()));
}

/*!
\qmlmethod string Qt::btoa(data)
Binary to ASCII - this function returns a base64 encoding of \c data.
*/
v8::Handle<v8::Value> btoa(const v8::Arguments &args)
{
    if (args.Length() != 1)
        V8THROW_ERROR("Qt.btoa(): Invalid arguments");

    QByteArray data = V8ENGINE()->toString(args[0]->ToString()).toUtf8();

    return V8ENGINE()->toString(QLatin1String(data.toBase64()));
}

/*!
\qmlmethod string Qt::atob(data)
ASCII to binary - this function returns a base64 decoding of \c data.
*/
v8::Handle<v8::Value> atob(const v8::Arguments &args)
{
    if (args.Length() != 1)
        V8THROW_ERROR("Qt.atob(): Invalid arguments");

    QByteArray data = V8ENGINE()->toString(args[0]->ToString()).toUtf8();

    return V8ENGINE()->toString(QLatin1String(QByteArray::fromBase64(data)));
}

/*!
\qmlmethod Qt::quit()
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This function causes the QQmlEngine::quit() signal to be emitted.
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Within the \l {QML Viewer}, this causes the launcher application to exit;
to quit a C++ application when this method is called, connect the
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QQmlEngine::quit() signal to the QCoreApplication::quit() slot.
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*/
v8::Handle<v8::Value> quit(const v8::Arguments &args)
{
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    QQmlEnginePrivate::get(V8ENGINE()->engine())->sendQuit();
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    return v8::Undefined();
}

/*!
\qmlmethod object Qt::createQmlObject(string qml, object parent, string filepath)

Returns a new object created from the given \a string of QML which will have the specified \a parent,
or \c null if there was an error in creating the object.

If \a filepath is specified, it will be used for error reporting for the created object.

Example (where \c parentItem is the id of an existing QML item):

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\snippet doc/src/snippets/qml/createQmlObject.qml 0
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In the case of an error, a QtScript Error object is thrown. This object has an additional property,
\c qmlErrors, which is an array of the errors encountered.
Each object in this array has the members \c lineNumber, \c columnNumber, \c fileName and \c message.
For example, if the above snippet had misspelled color as 'colro' then the array would contain an object like the following:
{ "lineNumber" : 1, "columnNumber" : 32, "fileName" : "dynamicSnippet1", "message" : "Cannot assign to non-existent property \"colro\""}.

Note that this function returns immediately, and therefore may not work if
the \a qml string loads new components (that is, external QML files that have not yet been loaded).
If this is the case, consider using \l{QML:Qt::createComponent()}{Qt.createComponent()} instead.

See \l {Dynamic Object Management in QML} for more information on using this function.
*/
v8::Handle<v8::Value> createQmlObject(const v8::Arguments &args)
{
    if (args.Length() < 2 || args.Length() > 3)
        V8THROW_ERROR("Qt.createQmlObject(): Invalid arguments");

    struct Error {
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        static v8::Local<v8::Value> create(QV8Engine *engine, const QList<QQmlError> &errors) {
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            QString errorstr = QLatin1String("Qt.createQmlObject(): failed to create object: ");

            v8::Local<v8::Array> qmlerrors = v8::Array::New(errors.count());
            for (int ii = 0; ii < errors.count(); ++ii) {
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                const QQmlError &error = errors.at(ii);
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                errorstr += QLatin1String("\n    ") + error.toString();
                v8::Local<v8::Object> qmlerror = v8::Object::New();
                qmlerror->Set(v8::String::New("lineNumber"), v8::Integer::New(error.line()));
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                qmlerror->Set(v8::String::New("columnNumber"), v8::Integer::New(error.column()));
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                qmlerror->Set(v8::String::New("fileName"), engine->toString(error.url().toString()));
                qmlerror->Set(v8::String::New("message"), engine->toString(error.description()));
                qmlerrors->Set(ii, qmlerror);
            }

            v8::Local<v8::Value> error = v8::Exception::Error(engine->toString(errorstr));
            v8::Local<v8::Object> errorObject = error->ToObject();
            errorObject->Set(v8::String::New("qmlErrors"), qmlerrors);
            return error;
        }
    };

    QV8Engine *v8engine = V8ENGINE();
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    QQmlEngine *engine = v8engine->engine();
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    QQmlContextData *context = v8engine->callingContext();
    QQmlContext *effectiveContext = 0;
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    if (context->isPragmaLibraryContext)
        effectiveContext = engine->rootContext();
    else
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        effectiveContext = context->asQQmlContext();
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    Q_ASSERT(context && effectiveContext);

    QString qml = v8engine->toString(args[0]->ToString());
    if (qml.isEmpty())
        return v8::Null();

    QUrl url;
    if (args.Length() > 2)
        url = QUrl(v8engine->toString(args[2]->ToString()));
    else
        url = QUrl(QLatin1String("inline"));

    if (url.isValid() && url.isRelative())
        url = context->resolvedUrl(url);

    QObject *parentArg = v8engine->toQObject(args[1]);
    if (!parentArg)
        V8THROW_ERROR("Qt.createQmlObject(): Missing parent object");

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    QQmlComponent component(engine);
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    component.setData(qml.toUtf8(), url);

    if (component.isError()) {
        v8::ThrowException(Error::create(v8engine, component.errors()));
        return v8::Undefined();
    }

    if (!component.isReady())
        V8THROW_ERROR("Qt.createQmlObject(): Component is not ready");

    QObject *obj = component.beginCreate(effectiveContext);
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    if (obj) {
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        QQmlData::get(obj, true)->explicitIndestructibleSet = false;
        QQmlData::get(obj)->indestructible = false;

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        obj->setParent(parentArg);

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        QList<QQmlPrivate::AutoParentFunction> functions = QQmlMetaType::parentFunctions();
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        for (int ii = 0; ii < functions.count(); ++ii) {
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            if (QQmlPrivate::Parented == functions.at(ii)(obj, parentArg))
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                break;
        }
    }
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    component.completeCreate();

    if (component.isError()) {
        v8::ThrowException(Error::create(v8engine, component.errors()));
        return v8::Undefined();
    }

    Q_ASSERT(obj);

    return v8engine->newQObject(obj);
}

/*!
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\qmlmethod object Qt::createComponent(url, mode, parent)
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Returns a \l Component object created using the QML file at the specified \a url,
or \c null if an empty string was given.

The returned component's \l Component::status property indicates whether the
component was successfully created. If the status is \c Component.Error,
see \l Component::errorString() for an error description.

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If the optional \a mode parameter is set to \c Component.Asynchronous, the
component will be loaded in a background thread.  The Component::status property
will be \c Component.Loading while it is loading.  The status will change to
\c Component.Ready if the component loads successfully, or \c Component.Error
if loading fails.

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If the optional \a parent parameter is given, it should refer to the object
that will become the parent for the created \l Component object.

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Call \l {Component::createObject()}{Component.createObject()} on the returned
component to create an object instance of the component.

For example:

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\snippet doc/src/snippets/qml/createComponent-simple.qml 0
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See \l {Dynamic Object Management in QML} for more information on using this function.

To create a QML object from an arbitrary string of QML (instead of a file),
use \l{QML:Qt::createQmlObject()}{Qt.createQmlObject()}.
*/
v8::Handle<v8::Value> createComponent(const v8::Arguments &args)
{
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    const char *invalidArgs = "Qt.createComponent(): Invalid arguments";
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    const char *invalidParent = "Qt.createComponent(): Invalid parent object";
    if (args.Length() < 1 || args.Length() > 3)
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        V8THROW_ERROR(invalidArgs);
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    QV8Engine *v8engine = V8ENGINE();
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    QQmlEngine *engine = v8engine->engine();
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    QQmlContextData *context = v8engine->callingContext();
    QQmlContextData *effectiveContext = context;
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    if (context->isPragmaLibraryContext)
        effectiveContext = 0;
    Q_ASSERT(context);

    QString arg = v8engine->toString(args[0]->ToString());
    if (arg.isEmpty())
        return v8::Null();

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    QQmlComponent::CompilationMode compileMode = QQmlComponent::PreferSynchronous;
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    // Default to engine parent; this will be removed in the near future (QTBUG-24841)
    QObject *parentArg = engine;

    unsigned consumedCount = 1;
    if (args.Length() > 1) {
        const v8::Local<v8::Value> &lastArg = args[args.Length()-1];

        // The second argument could be the mode enum
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        if (args[1]->IsInt32()) {
            int mode = args[1]->Int32Value();
            if (mode != int(QQmlComponent::PreferSynchronous) && mode != int(QQmlComponent::Asynchronous))
                V8THROW_ERROR(invalidArgs);
            compileMode = QQmlComponent::CompilationMode(mode);
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            consumedCount += 1;
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        } else {
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            // The second argument could be the parent only if there are exactly two args
            if ((args.Length() != 2) || !(lastArg->IsObject() || lastArg->IsNull()))
                V8THROW_ERROR(invalidArgs);
        }

        if (consumedCount < args.Length()) {
            if (lastArg->IsObject()) {
                parentArg = v8engine->toQObject(lastArg);
                if (!parentArg)
                    V8THROW_ERROR(invalidParent);
            } else if (lastArg->IsNull()) {
                parentArg = 0;
            } else {
                V8THROW_ERROR(invalidParent);
            }
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        }
    }

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    QUrl url = context->resolvedUrl(QUrl(arg));
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    QQmlComponent *c = new QQmlComponent(engine, url, compileMode, parentArg);
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    QQmlComponentPrivate::get(c)->creationContext = effectiveContext;
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    QQmlData::get(c, true)->explicitIndestructibleSet = false;
    QQmlData::get(c)->indestructible = false;

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    return v8engine->newQObject(c);
}

v8::Handle<v8::Value> qsTranslate(const v8::Arguments &args)
{
    if (args.Length() < 2)
        V8THROW_ERROR("qsTranslate() requires at least two arguments");
    if (!args[0]->IsString())
        V8THROW_ERROR("qsTranslate(): first argument (context) must be a string");
    if (!args[1]->IsString())
        V8THROW_ERROR("qsTranslate(): second argument (text) must be a string");
    if ((args.Length() > 2) && !args[2]->IsString())
        V8THROW_ERROR("qsTranslate(): third argument (comment) must be a string");
    if ((args.Length() > 3) && !args[3]->IsString())
        V8THROW_ERROR("qsTranslate(): fourth argument (encoding) must be a string");

    QV8Engine *v8engine = V8ENGINE();
    QString context = v8engine->toString(args[0]);
    QString text = v8engine->toString(args[1]);
    QString comment;
    if (args.Length() > 2) comment = v8engine->toString(args[2]);

    QCoreApplication::Encoding encoding = QCoreApplication::UnicodeUTF8;
    if (args.Length() > 3) {
        QString encStr = v8engine->toString(args[3]);
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        if (encStr == QLatin1String("UnicodeUTF8")) {
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            encoding = QCoreApplication::UnicodeUTF8;
        } else {
            QString msg = QString::fromLatin1("qsTranslate(): invalid encoding '%0'").arg(encStr);
            V8THROW_ERROR((uint16_t *)msg.constData());
        }
    }

    int n = -1;
    if (args.Length() > 4)
        n = args[4]->Int32Value();

    QString result = QCoreApplication::translate(context.toUtf8().constData(),
                                                 text.toUtf8().constData(),
                                                 comment.toUtf8().constData(),
                                                 encoding, n);

    return v8engine->toString(result);
}

v8::Handle<v8::Value> qsTranslateNoOp(const v8::Arguments &args)
{
    if (args.Length() < 2)
        return v8::Undefined();
    return args[1];
}

v8::Handle<v8::Value> qsTr(const v8::Arguments &args)
{
    if (args.Length() < 1)
        V8THROW_ERROR("qsTr() requires at least one argument");
    if (!args[0]->IsString())
        V8THROW_ERROR("qsTr(): first argument (text) must be a string");
    if ((args.Length() > 1) && !args[1]->IsString())
        V8THROW_ERROR("qsTr(): second argument (comment) must be a string");
    if ((args.Length() > 2) && !args[2]->IsNumber())
        V8THROW_ERROR("qsTr(): third argument (n) must be a number");

    QV8Engine *v8engine = V8ENGINE();
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    QQmlContextData *ctxt = v8engine->callingContext();
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    QString path = ctxt->url.toString();
    int lastSlash = path.lastIndexOf(QLatin1Char('/'));
    QString context = (lastSlash > -1) ? path.mid(lastSlash + 1, path.length()-lastSlash-5) : QString();

    QString text = v8engine->toString(args[0]);
    QString comment;
    if (args.Length() > 1)
        comment = v8engine->toString(args[1]);
    int n = -1;
    if (args.Length() > 2)
        n = args[2]->Int32Value();

    QString result = QCoreApplication::translate(context.toUtf8().constData(), text.toUtf8().constData(),
                                                 comment.toUtf8().constData(), QCoreApplication::UnicodeUTF8, n);

    return v8engine->toString(result);
}

v8::Handle<v8::Value> qsTrNoOp(const v8::Arguments &args)
{
    if (args.Length() < 1)
        return v8::Undefined();
    return args[0];
}

v8::Handle<v8::Value> qsTrId(const v8::Arguments &args)
{
    if (args.Length() < 1)
        V8THROW_ERROR("qsTrId() requires at least one argument");
    if (!args[0]->IsString())
        V8THROW_TYPE("qsTrId(): first argument (id) must be a string");
    if (args.Length() > 1 && !args[1]->IsNumber())
        V8THROW_TYPE("qsTrId(): second argument (n) must be a number");

    int n = -1;
    if (args.Length() > 1)
        n = args[1]->Int32Value();

    QV8Engine *v8engine = V8ENGINE();
    return v8engine->toString(qtTrId(v8engine->toString(args[0]).toUtf8().constData(), n));
}

v8::Handle<v8::Value> qsTrIdNoOp(const v8::Arguments &args)
{
    if (args.Length() < 1)
        return v8::Undefined();
    return args[0];
}

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/*!
    \qmlmethod Qt::locale(name)

    Returns a JS object representing the locale with the specified
    name, which has the format "language[_territory][.codeset][@modifier]"
    or "C", where:

    \list
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    \li language is a lowercase, two-letter, ISO 639 language code,
    \li territory is an uppercase, two-letter, ISO 3166 country code,
    \li and codeset and modifier are ignored.
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    \endlist

    If the string violates the locale format, or language is not a
    valid ISO 369 code, the "C" locale is used instead. If country
    is not present, or is not a valid ISO 3166 code, the most
    appropriate country is chosen for the specified language.

    \sa QtQuick2::Locale
*/
v8::Handle<v8::Value> locale(const v8::Arguments &args)
{
    QString code;
    if (args.Length() > 1)
        V8THROW_ERROR("locale() requires 0 or 1 argument");
    if (args.Length() == 1 && !args[0]->IsString())
        V8THROW_TYPE("locale(): argument (locale code) must be a string");

    QV8Engine *v8engine = V8ENGINE();
    if (args.Length() == 1)
        code = v8engine->toString(args[0]);

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    return QQmlLocale::locale(v8engine, code);
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}

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} // namespace QQmlBuiltinFunctions
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QT_END_NAMESPACE