plasma-framework/animations/animationscriptengine.cpp

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/*
* Copyright 2010 Aaron Seigo <aseigo@kde.org>
* Copyright 2010 Adenilson Cavalcanti <cavalcantii@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* TODO:
*
* - cleanup debug messages
*/
#include "animationscriptengine_p.h"
#include <QFile>
#include <QMetaEnum>
#include <QParallelAnimationGroup>
#include <QPauseAnimation>
#include <QSequentialAnimationGroup>
#include <QTextStream>
#include <kdebug.h>
#include <klocale.h>
#include "animator.h"
#include "javascriptanimation_p.h"
#include "bindings/animationgroup_p.h"
namespace Plasma
{
QScriptValue constructEasingCurveClass(QScriptEngine *engine);
namespace AnimationScriptEngine
{
QScriptEngine* inst = 0;
QHash<QString, QScriptValue> s_animFuncs;
QString s_prefix;
QScriptValue animation(const QString &anim)
{
return s_animFuncs.value(anim);
}
bool isAnimationRegistered(const QString &anim)
{
return s_animFuncs.contains(anim);
}
void clearAnimations()
{
s_animFuncs.clear();
delete inst;
inst = 0;
}
QScriptValue registerAnimation(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() > 1) {
const QString name = s_prefix + context->argument(0).toString();
if (!s_animFuncs.contains(name)) {
const QScriptValue func = context->argument(1);
if (func.isFunction()) {
s_animFuncs.insert(name, func);
}
}
}
return engine->undefinedValue();
}
QObject *extractParent(QScriptContext *context, QScriptEngine *engine)
{
Q_UNUSED(engine)
return context->thisObject().property("__plasma_javascriptanimation").toQObject();
}
QScriptValue animationGroup(QScriptContext *context, QScriptEngine *engine)
{
QObject *parent = extractParent(context, engine);
if (!parent) {
return engine->undefinedValue();
}
QSequentialAnimationGroup *group = new SequentialAnimationGroup(parent);
return engine->newQObject(group);
}
QScriptValue parallelAnimationGroup(QScriptContext *context, QScriptEngine *engine)
{
QObject *parent = extractParent(context, engine);
if (!parent) {
return engine->undefinedValue();
}
ParallelAnimationGroup *group = new ParallelAnimationGroup(parent);
return engine->newQObject(group);
}
void registerEnums(QScriptValue &scriptValue, const QMetaObject &meta)
{
//manually create enum values. ugh
QScriptEngine *engine = scriptValue.engine();
for (int i = 0; i < meta.enumeratorCount(); ++i) {
QMetaEnum e = meta.enumerator(i);
//kDebug() << e.name();
for (int i=0; i < e.keyCount(); ++i) {
//kDebug() << e.key(i) << e.value(i);
scriptValue.setProperty(e.key(i), QScriptValue(engine, e.value(i)));
}
}
}
QScriptValue animation(QScriptContext *context, QScriptEngine *engine)
{
if (context->argumentCount() != 1) {
return context->throwError(i18n("animation() takes one argument"));
}
QObject *parent = extractParent(context, engine);
QAbstractAnimation *anim = 0;
if (context->argument(0).isString()) {
const QString animName = context->argument(0).toString();
anim = Plasma::Animator::create(animName, parent);
} else {
int animId = context->argument(0).toInt32();
if (animId == JavascriptAnimation::PauseAnimation) {
anim = new QPauseAnimation(parent);
} else if (animId == JavascriptAnimation::PropertyAnimation) {
anim = new QPropertyAnimation(parent);
} else {
anim = Plasma::Animator::create(static_cast<Animator::Animation>(animId), parent);
}
}
if (anim) {
QScriptValue value = engine->newQObject(anim);
registerEnums(value, *anim->metaObject());
return value;
}
return context->throwError(i18n("%1 is not a known animation type", context->argument(0).isString()));
}
QScriptEngine *globalEngine()
{
if (!inst) {
inst = new QScriptEngine;
QScriptValue global = inst->globalObject();
global.setProperty("registerAnimation", inst->newFunction(AnimationScriptEngine::registerAnimation));
global.setProperty("AnimationGroup", inst->newFunction(AnimationScriptEngine::animationGroup));
global.setProperty("ParallelAnimationGroup", inst->newFunction(AnimationScriptEngine::parallelAnimationGroup));
global.setProperty("QEasingCurve", constructEasingCurveClass(inst));
kDebug() << "........... first js animation, creating the engine!";
}
return inst;
}
bool loadScript(const QString &path, const QString &prefix)
{
QFile file(path);
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
kError() << "failed to open script file" << path;
return false;
}
QTextStream buffer(&file);
QString tmp(buffer.readAll());
QScriptEngine *engine = AnimationScriptEngine::globalEngine();
s_prefix = prefix;
QScriptValue def(engine->evaluate(tmp, path));
s_prefix.clear();
if (engine->hasUncaughtException()) {
const QScriptValue error = engine->uncaughtException();
QString file = error.property("fileName").toString();
const QString failureMsg = QString("Error in %1 on line %2.\n%3")
.arg(file)
.arg(error.property("lineNumber").toString())
.arg(error.toString());
kError() << failureMsg;
return false;
}
return true;
}
} // namespace AnimationEngine
} // namespace Plasma