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**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtWebEngine module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** 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
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****************************************************************************/

#include "render_widget_host_view_qt_delegate_quick.h"

#include "qquickwebengineview_p.h"
#include "qquickwebengineview_p_p.h"
#include <QGuiApplication>
#include <QQuickPaintedItem>
#include <QQuickWindow>
#include <QVariant>
#include <QWindow>
#include <private/qquickwindow_p.h>
#include <private/qsgcontext_p.h>

namespace QtWebEngineCore {

RenderWidgetHostViewQtDelegateQuick::RenderWidgetHostViewQtDelegateQuick(RenderWidgetHostViewQtDelegateClient *client, bool isPopup)
    : m_client(client)
    , m_isPopup(isPopup)
    , m_initialized(false)
{
    setFlag(ItemHasContents);
    setAcceptedMouseButtons(Qt::AllButtons);
    setAcceptHoverEvents(true);
    if (isPopup)
        return;
    setFocus(true);
    setActiveFocusOnTab(true);
}

void RenderWidgetHostViewQtDelegateQuick::initAsChild(WebContentsAdapterClient* container)
{
    QQuickWebEngineViewPrivate *viewPrivate = static_cast<QQuickWebEngineViewPrivate *>(container);
    setParentItem(viewPrivate->q_func());
    setSize(viewPrivate->q_func()->boundingRect().size());
    m_initialized = true;
}

void RenderWidgetHostViewQtDelegateQuick::initAsPopup(const QRect &r)
{
    Q_ASSERT(m_isPopup && parentItem());
    QRectF rect(parentItem()->mapRectFromScene(r));
    setX(rect.x());
    setY(rect.y());
    setWidth(rect.width());
    setHeight(rect.height());
    setVisible(true);
    m_initialized = true;
}

QRectF RenderWidgetHostViewQtDelegateQuick::screenRect() const
{
    QPointF pos = mapToScene(QPointF(0,0));
    return QRectF(pos.x(), pos.y(), width(), height());
}

QRectF RenderWidgetHostViewQtDelegateQuick::contentsRect() const
{
    QPointF scenePoint = mapToScene(QPointF(0, 0));
    QPointF screenPos;
    if (window())
        screenPos = window()->mapToGlobal(scenePoint.toPoint());
    return QRectF(screenPos.x(), screenPos.y(), width(), height());
}

void RenderWidgetHostViewQtDelegateQuick::setKeyboardFocus()
{
    setFocus(true);
}

bool RenderWidgetHostViewQtDelegateQuick::hasKeyboardFocus()
{
    return hasFocus();
}

void RenderWidgetHostViewQtDelegateQuick::lockMouse()
{
    grabMouse();
}

void RenderWidgetHostViewQtDelegateQuick::unlockMouse()
{
    ungrabMouse();
}

void RenderWidgetHostViewQtDelegateQuick::show()
{
    setVisible(true);
}

void RenderWidgetHostViewQtDelegateQuick::hide()
{
    setVisible(false);
}

bool RenderWidgetHostViewQtDelegateQuick::isVisible() const
{
    return QQuickItem::isVisible();
}

QWindow* RenderWidgetHostViewQtDelegateQuick::window() const
{
    return QQuickItem::window();
}

QSGTexture *RenderWidgetHostViewQtDelegateQuick::createTextureFromImage(const QImage &image)
{
    return QQuickItem::window()->createTextureFromImage(image, QQuickWindow::TextureCanUseAtlas);
}

QSGLayer *RenderWidgetHostViewQtDelegateQuick::createLayer()
{
    QSGRenderContext *renderContext = QQuickWindowPrivate::get(QQuickItem::window())->context;
    return renderContext->sceneGraphContext()->createLayer(renderContext);
}

QSGImageNode *RenderWidgetHostViewQtDelegateQuick::createImageNode()
{
    QSGRenderContext *renderContext = QQuickWindowPrivate::get(QQuickItem::window())->context;
    return renderContext->sceneGraphContext()->createImageNode();
}

void RenderWidgetHostViewQtDelegateQuick::update()
{
    QQuickItem::update();
}

void RenderWidgetHostViewQtDelegateQuick::updateCursor(const QCursor &cursor)
{
    setCursor(cursor);
}

void RenderWidgetHostViewQtDelegateQuick::resize(int width, int height)
{
    setSize(QSizeF(width, height));
}

void RenderWidgetHostViewQtDelegateQuick::inputMethodStateChanged(bool editorVisible)
{
    if (qApp->inputMethod()->isVisible() == editorVisible)
        return;

    setFlag(QQuickItem::ItemAcceptsInputMethod, editorVisible);
    qApp->inputMethod()->update(Qt::ImQueryInput | Qt::ImEnabled | Qt::ImHints);
    qApp->inputMethod()->setVisible(editorVisible);
}

void RenderWidgetHostViewQtDelegateQuick::focusInEvent(QFocusEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::focusOutEvent(QFocusEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::mousePressEvent(QMouseEvent *event)
{
    if (!m_isPopup)
        forceActiveFocus();
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::mouseMoveEvent(QMouseEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::mouseReleaseEvent(QMouseEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::keyPressEvent(QKeyEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::keyReleaseEvent(QKeyEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::wheelEvent(QWheelEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::touchEvent(QTouchEvent *event)
{
    if (event->type() == QEvent::TouchBegin && !m_isPopup)
        forceActiveFocus();
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::hoverMoveEvent(QHoverEvent *event)
{
    m_client->forwardEvent(event);
}

QVariant RenderWidgetHostViewQtDelegateQuick::inputMethodQuery(Qt::InputMethodQuery query) const
{
    return m_client->inputMethodQuery(query);
}

void RenderWidgetHostViewQtDelegateQuick::inputMethodEvent(QInputMethodEvent *event)
{
    m_client->forwardEvent(event);
}

void RenderWidgetHostViewQtDelegateQuick::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    QQuickItem::geometryChanged(newGeometry, oldGeometry);
    m_client->notifyResize();
}

void RenderWidgetHostViewQtDelegateQuick::itemChange(ItemChange change, const ItemChangeData &value)
{
    QQuickItem::itemChange(change, value);
    if (change == QQuickItem::ItemSceneChange) {
        foreach (const QMetaObject::Connection &c, m_windowConnections)
            disconnect(c);
        m_windowConnections.clear();
        if (value.window) {
            m_windowConnections.append(connect(value.window, SIGNAL(xChanged(int)), SLOT(onWindowPosChanged())));
            m_windowConnections.append(connect(value.window, SIGNAL(yChanged(int)), SLOT(onWindowPosChanged())));
        }

        if (m_initialized)
            m_client->windowChanged();
    }
}

QSGNode *RenderWidgetHostViewQtDelegateQuick::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
    return m_client->updatePaintNode(oldNode);
}

void RenderWidgetHostViewQtDelegateQuick::onWindowPosChanged()
{
    m_client->windowBoundsChanged();
}

} // namespace QtWebEngineCore