1 files changed, 507 insertions, 0 deletions
diff --git a/src/controls/qquickabstractstackview_p.cpp b/src/controls/qquickabstractstackview_p.cpp
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+++ b/src/controls/qquickabstractstackview_p.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickabstractstackview_p_p.h"
+
+#include <QtQml/qqmllist.h>
+#include <QtQml/qqmlengine.h>
+#include <QtQml/qqmlcomponent.h>
+#include <QtQml/qqmlincubator.h>
+#include <QtQml/private/qqmlcomponent_p.h>
+#include <QtQuick/private/qquickanimation_p.h>
+#include <QtQuick/private/qquicktransition_p.h>
+#include <QtQuick/private/qquickitemviewtransition_p.h>
+
+QT_BEGIN_NAMESPACE
+
+static QQuickStackAttached *attachedStackObject(QQuickItem *item)
+{
+    return qobject_cast<QQuickStackAttached *>(qmlAttachedPropertiesObject<QQuickAbstractStackView>(item, false));
+}
+
+class QQuickStackIncubator : public QQmlIncubator
+{
+public:
+    QQuickStackIncubator(QQuickStackElement *element) : QQmlIncubator(Synchronous), element(element) { }
+
+protected:
+    void setInitialState(QObject *object) Q_DECL_OVERRIDE { element->initItem(object); }
+
+private:
+    QQuickStackElement *element;
+};
+
+QQuickStackElement::QQuickStackElement() : QQuickItemViewTransitionableItem(Q_NULLPTR),
+    index(-1), removal(false), ownItem(false), ownComponent(false),
+    context(Q_NULLPTR), component(Q_NULLPTR), incubator(Q_NULLPTR), view(Q_NULLPTR),
+    status(QQuickAbstractStackView::Inactive)
+{
+}
+
+QQuickStackElement::~QQuickStackElement()
+{
+    if (item) {
+        QQuickItemPrivate::get(item)->removeItemChangeListener(this, QQuickItemPrivate::Destroyed);
+
+        QQuickStackAttached *attached = attachedStackObject(item);
+        if (attached)
+            QQuickStackAttachedPrivate::get(attached)->reset();
+    }
+
+    if (ownComponent)
+        delete component;
+
+    if (ownItem && item) {
+        item->setParentItem(Q_NULLPTR);
+        item->deleteLater();
+        item = Q_NULLPTR;
+    } else if (item) {
+        item->setVisible(false);
+        item->setParentItem(originalParent);
+    }
+
+    delete context;
+    delete incubator;
+}
+
+QQuickStackElement *QQuickStackElement::fromString(const QString &str, QQuickAbstractStackView *view)
+{
+    QQuickStackElement *element = new QQuickStackElement;
+    element->component = new QQmlComponent(qmlEngine(view), QUrl(str), view);
+    element->ownComponent = true;
+    return element;
+}
+
+QQuickStackElement *QQuickStackElement::fromObject(QObject *object, QQuickAbstractStackView *view)
+{
+    QQuickStackElement *element = new QQuickStackElement;
+    element->component = qobject_cast<QQmlComponent *>(object);
+    if (!element->component) {
+        element->component = new QQmlComponent(qmlEngine(view), view);
+        element->ownComponent = true;
+    }
+    element->item = qobject_cast<QQuickItem *>(object);
+    if (element->item) {
+        element->originalParent = element->item->parentItem();
+        element->item->setParentItem(view);
+        QQuickItemPrivate::get(element->item)->addItemChangeListener(element, QQuickItemPrivate::Destroyed);
+    }
+    return element;
+}
+
+bool QQuickStackElement::load(QQuickAbstractStackView *parent)
+{
+    view = parent;
+    if (!item) {
+        ownItem = true;
+
+        QQmlContext *creationContext = component->creationContext();
+        if (!creationContext)
+            creationContext = qmlContext(parent);
+        context = new QQmlContext(creationContext);
+        context->setContextObject(parent);
+
+        delete incubator;
+        incubator = new QQuickStackIncubator(this);
+        component->create(*incubator, context);
+    }
+    initProperties();
+    return item;
+}
+
+void QQuickStackElement::initItem(QObject *object)
+{
+    item = qmlobject_cast<QQuickItem *>(object);
+    if (item) {
+        QQmlEngine::setObjectOwnership(item, QQmlEngine::CppOwnership);
+        QQuickItemPrivate *p = QQuickItemPrivate::get(item);
+        if (!p->widthValid) {
+            item->setWidth(view->width());
+            p->widthValid = false;
+        }
+        if (!p->heightValid) {
+            item->setHeight(view->height());
+            p->heightValid = false;
+        }
+        item->setParentItem(view);
+        p->addItemChangeListener(this, QQuickItemPrivate::Destroyed);
+    }
+    initProperties();
+}
+
+void QQuickStackElement::initProperties()
+{
+    if (!properties.isUndefined()) {
+        QQmlComponentPrivate *d = QQmlComponentPrivate::get(component);
+        Q_ASSERT(d && d->engine);
+        QV4::ExecutionEngine *v4 = qmlGlobal.engine();
+        Q_ASSERT(v4);
+        QV4::Scope scope(v4);
+        QV4::ScopedValue ipv(scope, properties.value());
+        d->initializeObjectWithInitialProperties(*qmlGlobal.valueRef(), ipv, item);
+        properties.clear();
+    }
+}
+
+void QQuickStackElement::setIndex(int value)
+{
+    if (index != value) {
+        index = value;
+        QQuickStackAttached *attached = attachedStackObject(item);
+        if (attached)
+            emit attached->indexChanged();
+    }
+}
+
+void QQuickStackElement::setStatus(QQuickAbstractStackView::Status value)
+{
+    if (status != value) {
+        status = value;
+        QQuickStackAttached *attached = attachedStackObject(item);
+        if (attached)
+            emit attached->statusChanged();
+    }
+}
+
+void QQuickStackElement::transitionNextReposition(QQuickItemViewTransitioner *transitioner, QQuickItemViewTransitioner::TransitionType type, bool asTarget)
+{
+    if (transitioner)
+        transitioner->transitionNextReposition(this, type, asTarget);
+}
+
+bool QQuickStackElement::prepareTransition(QQuickItemViewTransitioner *transitioner, const QRectF &viewBounds)
+{
+    if (transitioner) {
+        // TODO: add force argument to QQuickItemViewTransitionableItem::prepareTransition()?
+        nextTransitionToSet = true;
+        nextTransitionFromSet = true;
+        nextTransitionFrom += QPointF(1, 1);
+        return QQuickItemViewTransitionableItem::prepareTransition(transitioner, index, viewBounds);
+    }
+    return false;
+}
+
+void QQuickStackElement::startTransition(QQuickItemViewTransitioner *transitioner)
+{
+    if (transitioner)
+        QQuickItemViewTransitionableItem::startTransition(transitioner, index);
+}
+
+void QQuickStackElement::itemDestroyed(QQuickItem *)
+{
+    item = Q_NULLPTR;
+}
+
+QQuickAbstractStackViewPrivate::QQuickAbstractStackViewPrivate() : currentItem(Q_NULLPTR), transitioner(Q_NULLPTR)
+{
+}
+
+void QQuickAbstractStackViewPrivate::setCurrentItem(QQuickItem *item)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (currentItem != item) {
+        currentItem = item;
+        if (item)
+            item->setVisible(true);
+        emit q->currentItemChanged();
+    }
+}
+
+static bool initProperties(QQuickStackElement *element, const QV4::Value &props, QQmlV4Function *args)
+{
+    if (props.isObject()) {
+        const QV4::QObjectWrapper *wrapper = props.as<QV4::QObjectWrapper>();
+        if (!wrapper) {
+            QV4::ExecutionEngine *v4 = args->v4engine();
+            element->properties.set(v4, props);
+            element->qmlGlobal.set(v4, args->qmlGlobal());
+            return true;
+        }
+    }
+    return false;
+}
+
+QList<QQuickStackElement *> QQuickAbstractStackViewPrivate::parseElements(QQmlV4Function *args, int from)
+{
+    QV4::ExecutionEngine *v4 = args->v4engine();
+    QV4::Scope scope(v4);
+
+    QList<QQuickStackElement *> elements;
+
+    int argc = args->length();
+    for (int i = from; i < argc; ++i) {
+        QV4::ScopedValue arg(scope, (*args)[i]);
+        if (QV4::ArrayObject *array = arg->asArrayObject()) {
+            int len = array->getLength();
+            for (int j = 0; j < len; ++j) {
+                QV4::ScopedValue value(scope, array->getIndexed(j));
+                QQuickStackElement *element = createElement(value);
+                if (element) {
+                    if (j < len - 1) {
+                        QV4::ScopedValue props(scope, array->getIndexed(j + 1));
+                        if (initProperties(element, props, args))
+                            ++j;
+                    }
+                    elements += element;
+                }
+            }
+        } else {
+            QQuickStackElement *element = createElement(arg);
+            if (element) {
+                if (i < argc - 1) {
+                    QV4::ScopedValue props(scope, (*args)[i + 1]);
+                    if (initProperties(element, props, args))
+                        ++i;
+                }
+                elements += element;
+            }
+        }
+    }
+    return elements;
+}
+
+QQuickStackElement *QQuickAbstractStackViewPrivate::findElement(QQuickItem *item) const
+{
+    if (item) {
+        foreach (QQuickStackElement *e, elements) {
+            if (e->item == item)
+                return e;
+        }
+    }
+    return Q_NULLPTR;
+}
+
+QQuickStackElement *QQuickAbstractStackViewPrivate::findElement(const QV4::Value &value) const
+{
+    if (const QV4::QObjectWrapper *o = value.as<QV4::QObjectWrapper>())
+        return findElement(qobject_cast<QQuickItem *>(o->object()));
+    return Q_NULLPTR;
+}
+
+QQuickStackElement *QQuickAbstractStackViewPrivate::createElement(const QV4::Value &value)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (QV4::String *s = value.asString())
+        return QQuickStackElement::fromString(s->toQString(), q);
+    if (const QV4::QObjectWrapper *o = value.as<QV4::QObjectWrapper>())
+        return QQuickStackElement::fromObject(o->object(), q);
+    return Q_NULLPTR;
+}
+
+bool QQuickAbstractStackViewPrivate::pushElements(const QList<QQuickStackElement *> &elems)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (!elems.isEmpty()) {
+        foreach (QQuickStackElement *e, elems) {
+            e->setIndex(elements.count());
+            elements += e;
+        }
+        return elements.top()->load(q);
+    }
+    return false;
+}
+
+bool QQuickAbstractStackViewPrivate::pushElement(QQuickStackElement *element)
+{
+    if (element)
+        return pushElements(QList<QQuickStackElement *>() << element);
+    return false;
+}
+
+bool QQuickAbstractStackViewPrivate::popElements(QQuickStackElement *element)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (elements.count() > 1) {
+        while (elements.count() > 1 && elements.top() != element) {
+            delete elements.pop();
+            if (!element)
+                break;
+        }
+    }
+    return elements.top()->load(q);
+}
+
+bool QQuickAbstractStackViewPrivate::replaceElements(QQuickStackElement *target, const QList<QQuickStackElement *> &elems)
+{
+    if (target) {
+        while (!elements.isEmpty()) {
+            QQuickStackElement* top = elements.pop();
+            delete top;
+            if (top == target)
+                break;
+        }
+    }
+    return pushElements(elems);
+}
+
+void QQuickAbstractStackViewPrivate::ensureTransitioner()
+{
+    if (!transitioner) {
+        transitioner = new QQuickItemViewTransitioner;
+        transitioner->setChangeListener(this);
+    }
+}
+
+void QQuickAbstractStackViewPrivate::popTransition(QQuickStackElement *enter, QQuickStackElement *exit, const QRectF &viewBounds, bool immediate)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (exit) {
+        exit->setStatus(QQuickAbstractStackView::Deactivating);
+        exit->transitionNextReposition(transitioner, QQuickItemViewTransitioner::RemoveTransition, true);
+    }
+    if (enter) {
+        enter->setStatus(QQuickAbstractStackView::Activating);
+        enter->transitionNextReposition(transitioner, QQuickItemViewTransitioner::RemoveTransition, false);
+    }
+
+    if (exit && exit->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(exit, transitioner->removeTransition);
+        else
+            exit->startTransition(transitioner);
+    }
+    if (enter && enter->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(enter, transitioner->removeDisplacedTransition);
+        else
+            enter->startTransition(transitioner);
+    }
+
+    if (!immediate)
+        emit q->busyChanged();
+
+    if (transitioner)
+        transitioner->resetTargetLists();
+}
+
+void QQuickAbstractStackViewPrivate::pushTransition(QQuickStackElement *enter, QQuickStackElement *exit, const QRectF &viewBounds, bool immediate)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (enter) {
+        enter->setStatus(QQuickAbstractStackView::Activating);
+        enter->transitionNextReposition(transitioner, QQuickItemViewTransitioner::AddTransition, true);
+    }
+    if (exit) {
+        exit->setStatus(QQuickAbstractStackView::Deactivating);
+        exit->transitionNextReposition(transitioner, QQuickItemViewTransitioner::AddTransition, false);
+    }
+
+    if (enter && enter->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(enter, transitioner->addTransition);
+        else
+            enter->startTransition(transitioner);
+    }
+    if (exit && exit->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(exit, transitioner->addDisplacedTransition);
+        else
+            exit->startTransition(transitioner);
+    }
+
+    if (!immediate)
+        emit q->busyChanged();
+
+    if (transitioner)
+        transitioner->resetTargetLists();
+}
+
+void QQuickAbstractStackViewPrivate::replaceTransition(QQuickStackElement *enter, QQuickStackElement *exit, const QRectF &viewBounds, bool immediate)
+{
+    Q_Q(QQuickAbstractStackView);
+    if (enter) {
+        enter->setStatus(QQuickAbstractStackView::Activating);
+        enter->transitionNextReposition(transitioner, QQuickItemViewTransitioner::AddTransition, true);
+    }
+    if (exit) {
+        exit->removal = true;
+        exit->setStatus(QQuickAbstractStackView::Deactivating);
+        exit->transitionNextReposition(transitioner, QQuickItemViewTransitioner::AddTransition, false);
+    }
+
+    if (enter && enter->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(enter, transitioner->addTransition);
+        else
+            enter->startTransition(transitioner);
+    }
+    if (exit && exit->prepareTransition(transitioner, viewBounds)) {
+        if (immediate)
+            completeTransition(exit, transitioner->addDisplacedTransition);
+        else
+            exit->startTransition(transitioner);
+    }
+
+    if (!immediate)
+        emit q->busyChanged();
+
+    if (transitioner)
+        transitioner->resetTargetLists();
+}
+
+void QQuickAbstractStackViewPrivate::completeTransition(QQuickStackElement *element, QQuickTransition *transition)
+{
+    if (transition) {
+        // TODO: add a proper way to complete a transition
+        QQmlListProperty<QQuickAbstractAnimation> animations = transition->animations();
+        int count = animations.count(&animations);
+        for (int i = 0; i < count; ++i) {
+            QQuickAbstractAnimation *anim = animations.at(&animations, i);
+            anim->complete();
+        }
+        viewItemTransitionFinished(element);
+    }
+}
+
+void QQuickAbstractStackViewPrivate::viewItemTransitionFinished(QQuickItemViewTransitionableItem *transitionable)
+{
+    Q_Q(QQuickAbstractStackView);
+
+    QQuickStackElement *element = static_cast<QQuickStackElement *>(transitionable);
+    if (element->status == QQuickAbstractStackView::Activating) {
+        element->setStatus(QQuickAbstractStackView::Active);
+    } else if (element->status == QQuickAbstractStackView::Deactivating) {
+        element->setStatus(QQuickAbstractStackView::Inactive);
+        element->item->setVisible(false);
+        if (element->removal || element->isPendingRemoval())
+            delete element;
+    }
+
+    if (transitioner->runningJobs.isEmpty())
+        emit q->busyChanged();
+}
+
+QT_END_NAMESPACE