Adding more DesignerSupport functions

The new functions/enablers are split into new classes.

* DesignerSupportItems
  Helper functions to tweak and create items.

* DesignerSupportProperties
  Helper functions to deal with properties and bindings.

* DesignerSupportPropertyChanges
  Helper functions to deal with PropertyChanges.

* DesignerSupportStates
  Helper functions to deal with States.

* DesignerSupportMetaInfo
  Two helper functions to deal with meta info and notication.

DesignerMetaObject is a specialized QQmlVMEMetaObject that implments
notification of property changes and allows to create dynamic properties.

DesignerCustomObjectData provides additional data for each Object. The
main functionality atm is to keep the default values and bindings for
properties, so they can be restored.

Change-Id: I6b6f501c8c5848d62bfcb7e704bc45662e731d54
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

1 files changed, 477 insertions, 0 deletions

diff --git a/src/quick/designer/qquickdesignersupport.cpp b/src/quick/designer/qquickdesignersupport.cpp
new file mode 100644
index 0000000000..bc6352a677
--- /dev/null
+++ b/src/quick/designer/qquickdesignersupport.cpp
@@ -0,0 +1,477 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickdesignersupport_p.h"
+#include <private/qquickitem_p.h>
+
+#include <QtQuick/private/qquickshadereffectsource_p.h>
+#include <QtQuick/private/qquickrectangle_p.h>
+#include <QtQml/private/qabstractanimationjob_p.h>
+#include <private/qqmlengine_p.h>
+#include <private/qquickview_p.h>
+#include <private/qsgrenderloop_p.h>
+#include <QtQuick/private/qquickstategroup_p.h>
+#include <QtGui/QImage>
+#include <private/qqmlvme_p.h>
+#include <private/qqmlcomponentattached_p.h>
+#include <private/qqmldata_p.h>
+
+#include "qquickdesignerwindowmanager_p.h"
+
+
+QT_BEGIN_NAMESPACE
+
+QQuickDesignerSupport::QQuickDesignerSupport()
+{
+}
+
+QQuickDesignerSupport::~QQuickDesignerSupport()
+{
+    typedef QHash<QQuickItem*, QSGLayer*>::iterator ItemTextureHashIt;
+
+    for (ItemTextureHashIt iterator = m_itemTextureHash.begin(), end = m_itemTextureHash.end(); iterator != end; ++iterator) {
+        QSGLayer *texture = iterator.value();
+        QQuickItem *item = iterator.key();
+        QQuickItemPrivate::get(item)->derefFromEffectItem(true);
+        delete texture;
+    }
+}
+
+void QQuickDesignerSupport::refFromEffectItem(QQuickItem *referencedItem, bool hide)
+{
+    if (referencedItem == 0)
+        return;
+
+    QQuickItemPrivate::get(referencedItem)->refFromEffectItem(hide);
+    QQuickWindowPrivate::get(referencedItem->window())->updateDirtyNode(referencedItem);
+
+    Q_ASSERT(QQuickItemPrivate::get(referencedItem)->rootNode());
+
+    if (!m_itemTextureHash.contains(referencedItem)) {
+        QSGRenderContext *rc = QQuickWindowPrivate::get(referencedItem->window())->context;
+        QSGLayer *texture = rc->sceneGraphContext()->createLayer(rc);
+
+        texture->setLive(true);
+        texture->setItem(QQuickItemPrivate::get(referencedItem)->rootNode());
+        texture->setRect(referencedItem->boundingRect());
+        texture->setSize(referencedItem->boundingRect().size().toSize());
+        texture->setRecursive(true);
+#ifndef QT_OPENGL_ES
+        if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL)
+            texture->setFormat(GL_RGBA8);
+        else
+            texture->setFormat(GL_RGBA);
+#else
+        texture->setFormat(GL_RGBA);
+#endif
+        texture->setHasMipmaps(false);
+
+        m_itemTextureHash.insert(referencedItem, texture);
+    }
+}
+
+void QQuickDesignerSupport::derefFromEffectItem(QQuickItem *referencedItem, bool unhide)
+{
+    if (referencedItem == 0)
+        return;
+
+    delete m_itemTextureHash.take(referencedItem);
+    QQuickItemPrivate::get(referencedItem)->derefFromEffectItem(unhide);
+}
+
+QImage QQuickDesignerSupport::renderImageForItem(QQuickItem *referencedItem, const QRectF &boundingRect, const QSize &imageSize)
+{
+    if (referencedItem == 0 || referencedItem->parentItem() == 0) {
+        qDebug() << __FILE__ << __LINE__ << "Warning: Item can be rendered.";
+        return QImage();
+    }
+
+    QSGLayer *renderTexture = m_itemTextureHash.value(referencedItem);
+
+    Q_ASSERT(renderTexture);
+    if (renderTexture == 0)
+         return QImage();
+    renderTexture->setRect(boundingRect);
+    renderTexture->setSize(imageSize);
+    renderTexture->setItem(QQuickItemPrivate::get(referencedItem)->rootNode());
+    renderTexture->markDirtyTexture();
+    renderTexture->updateTexture();
+
+    QImage renderImage = renderTexture->toImage();
+    renderImage = renderImage.mirrored(false, true);
+
+    if (renderImage.size().isEmpty())
+        qDebug() << __FILE__ << __LINE__ << "Warning: Image is empty.";
+
+    return renderImage;
+}
+
+bool QQuickDesignerSupport::isDirty(QQuickItem *referencedItem, DirtyType dirtyType)
+{
+    if (referencedItem == 0)
+        return false;
+
+    return QQuickItemPrivate::get(referencedItem)->dirtyAttributes & dirtyType;
+}
+
+void QQuickDesignerSupport::addDirty(QQuickItem *referencedItem, QQuickDesignerSupport::DirtyType dirtyType)
+{
+    if (referencedItem == 0)
+        return;
+
+    QQuickItemPrivate::get(referencedItem)->dirtyAttributes |= dirtyType;
+}
+
+void QQuickDesignerSupport::resetDirty(QQuickItem *referencedItem)
+{
+    if (referencedItem == 0)
+        return;
+
+    QQuickItemPrivate::get(referencedItem)->dirtyAttributes = 0x0;
+    QQuickItemPrivate::get(referencedItem)->removeFromDirtyList();
+}
+
+QTransform QQuickDesignerSupport::windowTransform(QQuickItem *referencedItem)
+{
+    if (referencedItem == 0)
+        return QTransform();
+
+    return QQuickItemPrivate::get(referencedItem)->itemToWindowTransform();
+}
+
+QTransform QQuickDesignerSupport::parentTransform(QQuickItem *referencedItem)
+{
+    if (referencedItem == 0)
+        return QTransform();
+
+    QTransform parentTransform;
+
+    QQuickItemPrivate::get(referencedItem)->itemToParentTransform(parentTransform);
+
+    return parentTransform;
+}
+
+QString propertyNameForAnchorLine(const QQuickAnchorLine::AnchorLine &anchorLine)
+{
+    switch (anchorLine) {
+        case QQuickAnchorLine::Left: return QLatin1String("left");
+        case QQuickAnchorLine::Right: return QLatin1String("right");
+        case QQuickAnchorLine::Top: return QLatin1String("top");
+        case QQuickAnchorLine::Bottom: return QLatin1String("bottom");
+        case QQuickAnchorLine::HCenter: return QLatin1String("horizontalCenter");
+        case QQuickAnchorLine::VCenter: return QLatin1String("verticalCenter");
+        case QQuickAnchorLine::Baseline: return QLatin1String("baseline");
+        case QQuickAnchorLine::Invalid:
+        default: return QString();
+    }
+}
+
+bool isValidAnchorName(const QString &name)
+{
+    static QStringList anchorNameList(QStringList() << QLatin1String("anchors.top")
+                                                    << QLatin1String("anchors.left")
+                                                    << QLatin1String("anchors.right")
+                                                    << QLatin1String("anchors.bottom")
+                                                    << QLatin1String("anchors.verticalCenter")
+                                                    << QLatin1String("anchors.horizontalCenter")
+                                                    << QLatin1String("anchors.fill")
+                                                    << QLatin1String("anchors.centerIn")
+                                                    << QLatin1String("anchors.baseline"));
+
+    return anchorNameList.contains(name);
+}
+
+bool QQuickDesignerSupport::isAnchoredTo(QQuickItem *fromItem, QQuickItem *toItem)
+{
+    QQuickItemPrivate *fromItemPrivate = QQuickItemPrivate::get(fromItem);
+    QQuickAnchors *anchors = fromItemPrivate->anchors();
+    return anchors->fill() == toItem
+            || anchors->centerIn() == toItem
+            || anchors->bottom().item == toItem
+            || anchors->top().item == toItem
+            || anchors->left().item == toItem
+            || anchors->right().item == toItem
+            || anchors->verticalCenter().item == toItem
+            || anchors->horizontalCenter().item == toItem
+            || anchors->baseline().item == toItem;
+}
+
+bool QQuickDesignerSupport::areChildrenAnchoredTo(QQuickItem *fromItem, QQuickItem *toItem)
+{
+    Q_FOREACH (QQuickItem *childItem, fromItem->childItems()) {
+        if (childItem) {
+            if (isAnchoredTo(childItem, toItem))
+                return true;
+
+            if (areChildrenAnchoredTo(childItem, toItem))
+                return true;
+        }
+    }
+
+    return false;
+}
+
+QQuickAnchors *anchors(QQuickItem *item)
+{
+    QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
+    return itemPrivate->anchors();
+}
+
+QQuickAnchors::Anchor anchorLineFlagForName(const QString &name)
+{
+    if (name == QLatin1String("anchors.top"))
+        return QQuickAnchors::TopAnchor;
+
+    if (name == QLatin1String("anchors.left"))
+        return QQuickAnchors::LeftAnchor;
+
+    if (name == QLatin1String("anchors.bottom"))
+         return QQuickAnchors::BottomAnchor;
+
+    if (name == QLatin1String("anchors.right"))
+        return QQuickAnchors::RightAnchor;
+
+    if (name == QLatin1String("anchors.horizontalCenter"))
+        return QQuickAnchors::HCenterAnchor;
+
+    if (name == QLatin1String("anchors.verticalCenter"))
+         return QQuickAnchors::VCenterAnchor;
+
+    if (name == QLatin1String("anchors.baseline"))
+         return QQuickAnchors::BaselineAnchor;
+
+
+    Q_ASSERT_X(false, Q_FUNC_INFO, "wrong anchor name - this should never happen");
+    return QQuickAnchors::LeftAnchor;
+}
+
+bool QQuickDesignerSupport::hasAnchor(QQuickItem *item, const QString &name)
+{
+    if (!isValidAnchorName(name))
+        return false;
+
+    if (name == QLatin1String("anchors.fill"))
+        return anchors(item)->fill() != 0;
+
+    if (name == QLatin1String("anchors.centerIn"))
+        return anchors(item)->centerIn() != 0;
+
+    if (name == QLatin1String("anchors.right"))
+        return anchors(item)->right().item != 0;
+
+    if (name == QLatin1String("anchors.top"))
+        return anchors(item)->top().item != 0;
+
+    if (name == QLatin1String("anchors.left"))
+        return anchors(item)->left().item != 0;
+
+    if (name == QLatin1String("anchors.bottom"))
+        return anchors(item)->bottom().item != 0;
+
+    if (name == QLatin1String("anchors.horizontalCenter"))
+        return anchors(item)->horizontalCenter().item != 0;
+
+    if (name == QLatin1String("anchors.verticalCenter"))
+        return anchors(item)->verticalCenter().item != 0;
+
+    if (name == QLatin1String("anchors.baseline"))
+        return anchors(item)->baseline().item != 0;
+
+    return anchors(item)->usedAnchors().testFlag(anchorLineFlagForName(name));
+}
+
+QQuickItem *QQuickDesignerSupport::anchorFillTargetItem(QQuickItem *item)
+{
+    return anchors(item)->fill();
+}
+
+QQuickItem *QQuickDesignerSupport::anchorCenterInTargetItem(QQuickItem *item)
+{
+    return anchors(item)->centerIn();
+}
+
+
+
+QPair<QString, QObject*> QQuickDesignerSupport::anchorLineTarget(QQuickItem *item, const QString &name, QQmlContext *context)
+{
+    QObject *targetObject = 0;
+    QString targetName;
+
+    if (name == QLatin1String("anchors.fill")) {
+        targetObject = anchors(item)->fill();
+    } else if (name == QLatin1String("anchors.centerIn")) {
+        targetObject = anchors(item)->centerIn();
+    } else {
+        QQmlProperty metaProperty(item, name, context);
+        if (!metaProperty.isValid())
+            return QPair<QString, QObject*>();
+
+        QQuickAnchorLine anchorLine = metaProperty.read().value<QQuickAnchorLine>();
+        if (anchorLine.anchorLine != QQuickAnchorLine::Invalid) {
+            targetObject = anchorLine.item;
+            targetName = propertyNameForAnchorLine(anchorLine.anchorLine);
+        }
+
+    }
+
+    return QPair<QString, QObject*>(targetName, targetObject);
+}
+
+void QQuickDesignerSupport::resetAnchor(QQuickItem *item, const QString &name)
+{
+    if (name == QLatin1String("anchors.fill")) {
+        anchors(item)->resetFill();
+    } else if (name == QLatin1String("anchors.centerIn")) {
+        anchors(item)->resetCenterIn();
+    } else if (name == QLatin1String("anchors.top")) {
+        anchors(item)->resetTop();
+    } else if (name == QLatin1String("anchors.left")) {
+        anchors(item)->resetLeft();
+    } else if (name == QLatin1String("anchors.right")) {
+        anchors(item)->resetRight();
+    } else if (name == QLatin1String("anchors.bottom")) {
+        anchors(item)->resetBottom();
+    } else if (name == QLatin1String("anchors.horizontalCenter")) {
+        anchors(item)->resetHorizontalCenter();
+    } else if (name == QLatin1String("anchors.verticalCenter")) {
+        anchors(item)->resetVerticalCenter();
+    } else if (name == QLatin1String("anchors.baseline")) {
+        anchors(item)->resetBaseline();
+    }
+}
+
+void QQuickDesignerSupport::emitComponentCompleteSignalForAttachedProperty(QQuickItem *item)
+{
+    QQmlData *data = QQmlData::get(item);
+    if (data && data->context) {
+        QQmlComponentAttached *componentAttached = data->context->componentAttached;
+        if (componentAttached) {
+            emit componentAttached->completed();
+        }
+    }
+}
+
+QList<QObject*> QQuickDesignerSupport::statesForItem(QQuickItem *item)
+{
+    QList<QObject*> objectList;
+    QList<QQuickState *> stateList = QQuickItemPrivate::get(item)->_states()->states();
+
+    objectList.reserve(stateList.size());
+    Q_FOREACH (QQuickState* state, stateList)
+        objectList.append(state);
+
+    return objectList;
+}
+
+bool QQuickDesignerSupport::isComponentComplete(QQuickItem *item)
+{
+    return QQuickItemPrivate::get(item)->componentComplete;
+}
+
+int QQuickDesignerSupport::borderWidth(QQuickItem *item)
+{
+    QQuickRectangle *rectangle = qobject_cast<QQuickRectangle*>(item);
+    if (rectangle)
+        return rectangle->border()->width();
+
+    return 0;
+}
+
+void QQuickDesignerSupport::refreshExpressions(QQmlContext *context)
+{
+    QQmlContextPrivate::get(context)->data->refreshExpressions();
+}
+
+void QQuickDesignerSupport::setRootItem(QQuickView *view, QQuickItem *item)
+{
+    QQuickViewPrivate::get(view)->setRootObject(item);
+}
+
+bool QQuickDesignerSupport::isValidWidth(QQuickItem *item)
+{
+    return QQuickItemPrivate::get(item)->heightValid;
+}
+
+bool QQuickDesignerSupport::isValidHeight(QQuickItem *item)
+{
+    return QQuickItemPrivate::get(item)->widthValid;
+}
+
+void QQuickDesignerSupport::updateDirtyNode(QQuickItem *item)
+{
+    if (item->window())
+        QQuickWindowPrivate::get(item->window())->updateDirtyNode(item);
+}
+
+void QQuickDesignerSupport::activateDesignerWindowManager()
+{
+    QSGRenderLoop::setInstance(new QQuickDesignerWindowManager);
+}
+
+void QQuickDesignerSupport::activateDesignerMode()
+{
+    QQmlEnginePrivate::activateDesignerMode();
+}
+
+void QQuickDesignerSupport::disableComponentComplete()
+{
+    QQmlVME::disableComponentComplete();
+}
+
+void QQuickDesignerSupport::enableComponentComplete()
+{
+    QQmlVME::enableComponentComplete();
+}
+
+void QQuickDesignerSupport::createOpenGLContext(QQuickWindow *window)
+{
+    QQuickDesignerWindowManager::createOpenGLContext(window);
+}
+
+void QQuickDesignerSupport::polishItems(QQuickWindow *window)
+{
+    QQuickWindowPrivate::get(window)->polishItems();
+}
+
+ComponentCompleteDisabler::ComponentCompleteDisabler()
+{
+    QQuickDesignerSupport::disableComponentComplete();
+}
+
+ComponentCompleteDisabler::~ComponentCompleteDisabler()
+{
+    QQuickDesignerSupport::enableComponentComplete();
+}
+
+
+QT_END_NAMESPACE