path: root/src/declarative/fx/qfxwebview.cpp

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** Contact: Qt Software Information (qt-info@nokia.com)
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#include <QDebug>
#include <QPen>
#include <QFile>
#include <QEvent>
#include <QBasicTimer>
#include <QApplication>
#include <QGraphicsSceneMouseEvent>
#include <QtWebKit/QWebPage>
#include <QtWebKit/QWebFrame>

#include "qml.h"
#include "qmlbindablevalue.h"
#include "qmlengine.h"
#include "qmlstate.h"
#include "qfxtransform.h"
#include "qfxscalegrid.h"
#include "qsimplecanvas.h"
#include "qlistmodelinterface.h"

#if defined(QFX_RENDER_OPENGL2)
#include <QtOpenGL/qglframebufferobject.h>
#include <glsave.h>
#endif
#if defined(QFX_RENDER_OPENGL)
#include <gltexture.h>
#endif

#include "qfxwebview.h"
#include <qsimplecanvasfilter.h>
#include <private/qfxitem_p.h>

QT_BEGIN_NAMESPACE
QML_DEFINE_TYPE(QFxWebView,WebView);

static const int MAX_DOUBLECLICK_TIME=500; // XXX need better gesture system

class QFxWebViewPrivate : public QFxItemPrivate
{
    Q_DECLARE_PUBLIC(QFxWebView)

public:
    QFxWebViewPrivate()
      : page(0), idealwidth(0), idealheight(0), interactive(true), lastPress(0), lastRelease(0), mouseX(0), mouseY(0),
            smooth(true), max_imagecache_size(100000), progress(1.0), pending(PendingNone)
    {
    }

    QWebPage *page;

    struct ImageCacheItem {
        ImageCacheItem() : age(0) {}
        ~ImageCacheItem() { }
        int age;
        QRect area;
#if defined(QFX_RENDER_QPAINTER)
        QSimpleCanvasConfig::Image image;
#else
        GLTexture image;
#endif
    };
    QList<ImageCacheItem*> imagecache;
    void dirtyCache(const QRect& dirt)
    {
        for (int i=0; i<imagecache.count(); ) {
            if (imagecache[i]->area.intersects(dirt)) {
                imagecache.removeAt(i);
            } else {
                ++i;
            }
        }
    }
    void clearCache()
    {
        foreach (ImageCacheItem* i, imagecache)
            delete i;
        imagecache.clear();
    }

    int idealwidth;
    int idealheight;
    bool interactive;
    QMouseEvent *lastPress, *lastRelease;
    int mouseX, mouseY;
    bool smooth;
    int max_imagecache_size;
    qreal progress;
    QBasicTimer dcTimer;
    QString statusBarMessage;
    enum { PendingNone, PendingUrl, PendingHtml, PendingContent } pending;
    QUrl pending_url;
    QString pending_string;
    QByteArray pending_data;
};


/*!
    \qmlclass WebView
    \brief The WebView element allows you to add web content to a canvas.
    \inherits Item

    A WebView renders web content based on a URL.

    If the width and height of the element is not set, they will
    dynamically adjust to a size appropriate for the content.
    This width may be large (eg. 980) for typical online web pages.

    If the idealWidth is set, the width will be this amount or larger,
    usually laying out the web content to fit the idealWidth.

    If the idealHeight is set, the height will be this amount or larger.
    Due to WebKit limitations, the height may be more than necessary
    if the idealHeight is changed after the content is loaded.

    \code
    <WebView url="http://www.nokia.com" smooth="true" scale="0.5" width="490" height="400"/>
    \endcode

    \image webview.png

    The element includes no scrolling, scaling,
    toolbars, etc., those must be implemented around WebView. See the WebBrowser example
    for a demonstration of this.
*/

/*!
    \internal
    \class QFxWebView
    \brief The QFxWebView class allows you to add web content to a QFxView.

    A WebView renders web content base on a URL.

    \image webview.png

    The element includes no scrolling, scaling,
    toolbars, etc., those must be implemented around WebView. See the WebBrowser example
    for a demonstration of this.

    A QFxWebView object can be instantiated in Qml using the tag \l WebView.
*/

QFxWebView::QFxWebView(QFxItem *parent)
  : QFxItem(*(new QFxWebViewPrivate), parent)
{
    init();
}

QFxWebView::QFxWebView(QFxWebViewPrivate &dd, QFxItem *parent)
  : QFxItem(dd, parent)
{
    init();
}

QFxWebView::~QFxWebView()
{
    Q_D(QFxWebView);
    delete d->page;
}

void QFxWebView::init()
{
    setAcceptedMouseButtons(Qt::LeftButton);
    setOptions(HasContents | MouseEvents);
    setFocusable(true);

    QWebPage *wp = new QFxWebPage(this);

    // QML elements don't default to having a background,
    // even though most we pages will set one anyway.
    QPalette pal = QApplication::palette();
    pal.setBrush(QPalette::Base, QColor::fromRgbF(0, 0, 0, 0));
    wp->setPalette(pal);

    wp->setNetworkAccessManager(itemContext()->engine()->networkAccessManager());
    setPage(wp);

    // XXX settable from QML?
    settings()->setAttribute(QWebSettings::PluginsEnabled, true);
}

void QFxWebView::componentComplete()
{
    QFxItem::componentComplete();
    Q_D(QFxWebView);
    switch (d->pending) {
        case QFxWebViewPrivate::PendingUrl:
            setUrl(d->pending_url.toString());
            break;
        case QFxWebViewPrivate::PendingHtml:
            setHtml(d->pending_string, d->pending_url);
            break;
        case QFxWebViewPrivate::PendingContent:
            setContent(d->pending_data, d->pending_string, d->pending_url);
            break;
        default:
            break;
    }
    d->pending = QFxWebViewPrivate::PendingNone;
}

/*!
    \qmlproperty real WebView::progress
    This property holds the progress of loading the current URL, from 0 to 1.
*/
/*!
    \property qreal QFxWebView::progress
    \brief the progress of loading the current URL, from 0 to 1.
*/
qreal QFxWebView::progress() const
{
    Q_D(const QFxWebView);
    return d->progress;
}

void QFxWebView::doLoadProgress(int p)
{
    Q_D(QFxWebView);
    if (d->progress == p/100.0)
        return;
    d->progress = p/100.0;
    expandToWebPage();
    emit progressChanged();
}

void QFxWebView::doLoadFinished(bool ok)
{
    // XXX bug 232556 - pages with no title never get this signal
    if (title().isEmpty())
        emit urlChanged();

    if (ok) {
        emit loadFinished();
    } else {
        emit loadFailed();
    }
}

/*!
    \qmlproperty string WebView::url
    This property holds the URL to the page displayed in this item.

    Note that after this property is set, it may take some time
    before the change is notified, as this only happens when
    loading of the URL successfully starts.
*/
/*!
    \property QString QFxWebView::url
    \brief the URL to the page displayed in this item.

    \sa urlChanged()
*/
/*!
    \fn void QFxWebView::urlChanged()

    Emitted when loading of the URL successfully starts after
    setUrl() is called.
*/
QString QFxWebView::url() const
{
    Q_D(const QFxWebView);
    return d->page->mainFrame()->url().toString();
}

void QFxWebView::setUrl(const QString &n)
{
    Q_D(QFxWebView);
    if(n == d->page->mainFrame()->url().toString())
        return;

    d->page->setViewportSize(QSize(
        d->idealwidth>0 ? d->idealwidth : width(),
        d->idealheight>0 ? d->idealheight : height()));

    QUrl url(n);
    if (url.isRelative())
        url = itemContext()->resolvedUrl(n);

    if (isComponentComplete())
        d->page->mainFrame()->load(url);
    else {
        d->pending = d->PendingUrl;
        d->pending_url = url;
    }

    // emit urlChanged() - not until actually loaded
}

/*!
    \qmlproperty int WebView::idealWidth
    This property holds the ideal width for displaying the current URL.
*/
/*!
    \property int QFxWebView::idealWidth
    \brief the ideal width for displaying the current URL.
*/
int QFxWebView::idealWidth() const
{
    Q_D(const QFxWebView);
    return d->idealwidth;
}

void QFxWebView::setIdealWidth(int iw)
{
    Q_D(QFxWebView);
    if(d->idealwidth == iw) return;
    d->idealwidth = iw;
    expandToWebPage();
    emit idealWidthChanged();
}

/*!
    \qmlproperty int WebView::idealHeight
    This property holds the ideal height for displaying the current URL.
*/
/*!
    \property int QFxWebView::idealHeight
    \brief the ideal height for displaying the current URL.
*/
int QFxWebView::idealHeight() const
{
    Q_D(const QFxWebView);
    return d->idealheight;
}

void QFxWebView::setIdealHeight(int ih)
{
    Q_D(QFxWebView);
    if(d->idealheight == ih) return;
    d->idealheight = ih;
    expandToWebPage();
    emit idealHeightChanged();
}

/*!
    \qmlproperty bool WebView::interactive
    This property holds controls whether the item responds to mouse and key events.
*/
/*!
    \property bool QFxWebView::interactive
    \brief controls whether the item responds to mouse and key events.
*/
bool QFxWebView::interactive() const
{
    Q_D(const QFxWebView);
    return d->interactive;
}

void QFxWebView::setInteractive(bool i)
{
    Q_D(QFxWebView);
    if(d->interactive == i) return;
    d->interactive = i;
    emit interactiveChanged();
}

/*!
    \qmlproperty bool WebView::smooth
    This property holds hints as to whether the item should be drawn anti-aliased.
*/
/*!
    \property bool QFxWebView::smooth
    \brief hints as to whether the item should be drawn anti-aliased.
*/
bool QFxWebView::smooth() const
{
    Q_D(const QFxWebView);
    return d->smooth;
}

void QFxWebView::setSmooth(bool i)
{
    Q_D(QFxWebView);
    if(d->smooth == i) return;
    d->smooth = i;
    update();
}

void QFxWebView::updateCacheForVisibility()
{
    Q_D(QFxWebView);
    if (!isVisible())
        d->clearCache();
}

void QFxWebView::expandToWebPage()
{
    Q_D(QFxWebView);
    QSize cs = d->page->mainFrame()->contentsSize();
    if (cs.width() < d->idealwidth)
        cs.setWidth(d->idealwidth);
    if (cs.height() < d->idealheight)
        cs.setHeight(d->idealheight);
    if (widthValid() && cs.width() < width())
        cs.setWidth(width());
    if (heightValid() && cs.height() < height())
        cs.setHeight(height());
    if (cs != d->page->viewportSize()) {
        d->page->setViewportSize(cs);
        d->clearCache();
        setImplicitWidth(cs.width());
        setImplicitHeight(cs.height());
    }
}

void QFxWebView::geometryChanged(const QRectF &newGeometry, 
                                 const QRectF &oldGeometry)
{
    if(newGeometry.size() != oldGeometry.size())
        expandToWebPage();
    QFxItem::geometryChanged(newGeometry, oldGeometry);
}

void QFxWebView::paintPage(const QRect& r)
{
    Q_D(QFxWebView);
    d->dirtyCache(r);
    update();
}

/*!
    \qmlproperty int WebView::cacheSize
    This property holds the maximum number of pixels of image cache to allow

    The default is 0.1 megapixels.

    The cache will not be larger than the (unscaled) size of the WebView.
*/
/*!
    \property int QFxWebView::cacheSize
    \brief the maximum number of pixels of image cache to allow
    The default is 0.1 megapixels.

    The cache will not be larger than the (unscaled) size of the QFxWebView.
*/
int QFxWebView::cacheSize() const
{
    Q_D(const QFxWebView);
    return d->max_imagecache_size;
}

void QFxWebView::setCacheSize(int pixels)
{
    Q_D(QFxWebView);
    if (pixels < d->max_imagecache_size) {
        int cachesize=0;
        for (int i=0; i<d->imagecache.count(); ++i) {
            QRect area = d->imagecache[i]->area;
            cachesize += area.width()*area.height();
        }
        while (d->imagecache.count() && cachesize > pixels) {
            int oldest=-1;
            int age=-1;
            for (int i=0; i<d->imagecache.count(); ++i) {
                int a = d->imagecache[i]->age;
                if (a > age) {
                    oldest = i;
                    age = a;
                }
            }
            cachesize -= d->imagecache[oldest]->area.width()*d->imagecache[oldest]->area.height();
            d->imagecache.removeAt(oldest);
        }
    }
    d->max_imagecache_size = pixels;
}

void QFxWebView::dump(int depth)
{
    QByteArray ba(depth * 4, ' ');
    qWarning() << ba.constData() << "url:" << url();
    QFxItem::dump(depth);
}

#if defined(QFX_RENDER_QPAINTER) 
void QFxWebView::paintContents(QPainter &p)
#elif defined(QFX_RENDER_OPENGL)
void QFxWebView::paintGLContents(GLPainter &p)
#else
#error "What render?"
#endif
{
    Q_D(QFxWebView);
    QWebFrame *frame = d->page->mainFrame();
    const QRect content(QPoint(0,0),frame->contentsSize());

    if (content.width() <= 0 || content.height() <= 0)
        return;

#if defined(QFX_RENDER_QPAINTER)
    bool wasAA = p.testRenderHint(QPainter::Antialiasing);
    p.setRenderHints(QPainter::Antialiasing, d->smooth);
    QRectF clipf = p.clipRegion().boundingRect();
    const QRect clip = p.clipRegion().isEmpty() ? content : clipf.toRect();
#elif defined(QFX_RENDER_OPENGL)
    const QRectF clipf = p.sceneClipRect;
    const QRect clip = mapFromScene(clipf).toRect();
#endif

    QRegion topaint(clip);
    topaint &= content;
    QRegion uncached(content);

    int cachesize=0;
    for (int i=0; i<d->imagecache.count(); ++i) {
        QRect area = d->imagecache[i]->area;
        if (topaint.contains(area)) {
            p.drawImage(area, d->imagecache[i]->image);
            topaint -= area;
            d->imagecache[i]->age=0;
        } else {
            d->imagecache[i]->age++;
        }
        cachesize += area.width()*area.height();
        uncached -= area;
    }

    if (!topaint.isEmpty()) {
        // Find a sensible larger area, otherwise will paint lots of tiny images.
        QRect biggerrect = topaint.boundingRect().adjusted(-64,-64,128,128);
        cachesize += biggerrect.width() * biggerrect.height();
        while (d->imagecache.count() && cachesize > d->max_imagecache_size) {
            int oldest=-1;
            int age=-1;
            for (int i=0; i<d->imagecache.count(); ++i) {
                int a = d->imagecache[i]->age;
                if (a > age) {
                    oldest = i;
                    age = a;
                }
            }
            cachesize -= d->imagecache[oldest]->area.width()*d->imagecache[oldest]->area.height();
            uncached += d->imagecache[oldest]->area;
            d->imagecache.removeAt(oldest);
        }
        const QRegion bigger = QRegion(biggerrect) & uncached;
        const QVector<QRect> rects = bigger.rects();
        foreach (QRect r, rects) {
            QImage img(r.size(),QImage::Format_ARGB32_Premultiplied);
            img.fill(0);
            {
                QPainter qp(&img);
                qp.translate(-r.x(),-r.y());
                frame->render(&qp,r);
            }
            QFxWebViewPrivate::ImageCacheItem *newitem = new QFxWebViewPrivate::ImageCacheItem;
            newitem->area = r;
#if defined(QFX_RENDER_QPAINTER)
            newitem->image = QSimpleCanvasConfig::Image(QSimpleCanvasConfig::toImage(img));
#else
            newitem->image.setImage(img);
#endif
            d->imagecache.append(newitem);
            p.drawImage(r, newitem->image);
        }
    }
#if defined(QFX_RENDER_QPAINTER)
    p.setRenderHints(QPainter::Antialiasing, wasAA);
#endif
}

QString QFxWebView::propertyInfo() const
{
    Q_D(const QFxWebView);
    return d->page->mainFrame()->url().toString();
}

static QMouseEvent *sceneMouseEventToMouseEvent(QGraphicsSceneMouseEvent *e)
{
    QEvent::Type t;
    switch(e->type()) {
    default:
    case QEvent::GraphicsSceneMousePress:
        t = QEvent::MouseButtonPress;
        break;
    case QEvent::GraphicsSceneMouseRelease:
        t = QEvent::MouseButtonRelease;
        break;
    case QEvent::GraphicsSceneMouseMove:
        t = QEvent::MouseMove;
        break;
    case QGraphicsSceneEvent::GraphicsSceneMouseDoubleClick:
        t = QEvent::MouseButtonDblClick;
        break;
    }

    QMouseEvent *me = new QMouseEvent(t, e->pos().toPoint(), e->button(), e->buttons(), 0);
    return me;
}


void QFxWebView::timerEvent(QTimerEvent *event)
{
    Q_D(QFxWebView);
    if (event->timerId() ==d->dcTimer.timerId()) {
        d->dcTimer.stop();
        if (d->lastPress) {
            d->page->event(d->lastPress);
            delete d->lastPress;
            d->lastPress = 0;
        }
        if (d->lastRelease) {
            d->page->event(d->lastRelease);
            delete d->lastRelease;
            d->lastRelease = 0;
        }
    }
}

int QFxWebView::mouseX() const
{
    Q_D(const QFxWebView);
    if (d->lastPress)
        return d->lastPress->x();
    if (d->lastRelease)
        return d->lastRelease->x();
    return d->mouseX;
}

int QFxWebView::mouseY() const
{
    Q_D(const QFxWebView);
    if (d->lastPress)
        return d->lastPress->y();
    if (d->lastRelease)
        return d->lastRelease->y();
    return d->mouseY;
}

void QFxWebView::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
    QMouseEvent *me = sceneMouseEventToMouseEvent(event);
    Q_D(QFxWebView);
    d->dcTimer.stop();
    delete d->lastPress;
    delete d->lastRelease;
    d->lastPress = 0;
    d->lastRelease = 0;
    d->mouseX = me->x();
    d->mouseY = me->y();
    emit doubleClick();
    d->mouseX = 0;
    d->mouseY = 0;
    delete me;
}

void QFxWebView::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    Q_D(QFxWebView);
    if (d->interactive) {
        d->lastPress = sceneMouseEventToMouseEvent(event);
        event->setAccepted(true);
    } else {
        event->setAccepted(false);
    }
    if (!event->isAccepted())
        QFxItem::mousePressEvent(event);
}

void QFxWebView::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    Q_D(QFxWebView);
    if (d->interactive) {
        d->lastRelease = sceneMouseEventToMouseEvent(event);
        d->dcTimer.start(MAX_DOUBLECLICK_TIME,this);
        event->setAccepted(true);
    } else {
        event->setAccepted(false);
    }
    if (!event->isAccepted())
        QFxItem::mouseReleaseEvent(event);
}

void QFxWebView::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    Q_D(const QFxWebView);
    if (d->interactive && !d->dcTimer.isActive()) {
        QMouseEvent *me = sceneMouseEventToMouseEvent(event);
        d->page->event(me);
        event->setAccepted(
#if QT_VERSION <= 0x040500 // XXX see bug 230835
            true
#else
            me->isAccepted()
#endif
        );
        delete me;
    } else {
        event->setAccepted(false);
    }
    if (!event->isAccepted())
        QFxItem::mouseMoveEvent(event);
}

void QFxWebView::keyPressEvent(QKeyEvent* event)
{
    Q_D(const QFxWebView);
    if (d->interactive)
        d->page->event(event);
    if (!event->isAccepted())
        QFxItem::keyPressEvent(event);
}

void QFxWebView::keyReleaseEvent(QKeyEvent* event)
{
    Q_D(const QFxWebView);
    if (d->interactive)
        d->page->event(event);
    if (!event->isAccepted())
        QFxItem::keyReleaseEvent(event);
}

/*!
    \qmlproperty action WebView::back
    This property holds the action for causing the previous URL in the history to be displayed.
*/
QAction *QFxWebView::backAction() const
{
    Q_D(const QFxWebView);
    return d->page->action(QWebPage::Back);
}

/*!
    \qmlproperty action WebView::forward
    This property holds the action for causing the next URL in the history to be displayed.
*/
QAction *QFxWebView::forwardAction() const
{
    Q_D(const QFxWebView);
    return d->page->action(QWebPage::Forward);
}

/*!
    \qmlproperty action WebView::reload
    This property holds the action for reloading with the current URL
*/
QAction *QFxWebView::reloadAction() const
{
    Q_D(const QFxWebView);
    return d->page->action(QWebPage::Reload);
}

/*!
    \qmlproperty action WebView::stop
    This property holds the action for stopping loading with the current URL
*/
QAction *QFxWebView::stopAction() const
{
    Q_D(const QFxWebView);
    return d->page->action(QWebPage::Stop);
}

/*!
    \qmlproperty real WebView::title
    This property holds the title of the web page currently viewed

    By default, this property contains an empty string.
*/
/*!
    \property QFxWebView::title
    This property holds the title of the web page currently viewed

    By default, this property contains an empty string.

    \sa titleChanged()
*/
QString QFxWebView::title() const
{
    Q_D(const QFxWebView);
    if (d->page)
        return d->page->mainFrame()->title();
    return QString();
}



/*!
    \qmlproperty pixmap WebView::icon
    This property holds the icon associated with the web page currently viewed
*/
/*!
    \property QFxWebView::icon
    \brief the icon associated with the web page currently viewed

    By default, this property contains a null icon.

    \sa iconChanged(), QWebSettings::iconForUrl()
*/
QPixmap QFxWebView::icon() const
{
    Q_D(const QFxWebView);
    if (d->page)
        return d->page->mainFrame()->icon().pixmap(QSize(256,256));
    return QPixmap();
}


/*!
    \qmlproperty real WebView::textSizeMultiplier
    This property holds multiplier used to scale the text in a Web page
*/
/*!
    Sets the value of the multiplier used to scale the text in a Web page to
    the \a factor specified.
*/
void QFxWebView::setTextSizeMultiplier(qreal factor)
{
    Q_D(QFxWebView);
    d->page->mainFrame()->setTextSizeMultiplier(factor);
}

/*!
    Returns the value of the multiplier used to scale the text in a Web page.
*/
qreal QFxWebView::textSizeMultiplier() const
{
    Q_D(const QFxWebView);
    return d->page->mainFrame()->textSizeMultiplier();
}

void QFxWebView::setStatusBarMessage(const QString& s)
{
    Q_D(QFxWebView);
    d->statusBarMessage = s;
    emit statusChanged();
}

QString QFxWebView::status() const
{
    Q_D(const QFxWebView);
    return d->statusBarMessage;
}

QWebPage *QFxWebView::page() const
{
    Q_D(const QFxWebView);
    return d->page;
}

void QFxWebView::setPage(QWebPage *page)
{
    Q_D(QFxWebView);
    if (d->page == page)
        return;
    if (d->page) {
        if (d->page->parent() == this) {
            delete d->page;
        } else {
            d->page->disconnect(this);
        }
    }
    d->page = page;
    d->page->setViewportSize(QSize(
        d->idealwidth>0 ? d->idealwidth : -1,
        d->idealheight>0 ? d->idealheight : -1));
    d->page->mainFrame()->setScrollBarPolicy(Qt::Horizontal,Qt::ScrollBarAlwaysOff);
    d->page->mainFrame()->setScrollBarPolicy(Qt::Vertical,Qt::ScrollBarAlwaysOff);
    connect(this,SIGNAL(visibleChanged()),this,SLOT(updateCacheForVisibility()));
    connect(d->page,SIGNAL(repaintRequested(QRect)),this,SLOT(paintPage(QRect)));
    connect(d->page->mainFrame(),SIGNAL(urlChanged(QUrl)),this,SIGNAL(urlChanged()));
    connect(d->page->mainFrame(), SIGNAL(titleChanged(QString)), this, SIGNAL(titleChanged(QString)));
    connect(d->page->mainFrame(), SIGNAL(iconChanged()), this, SIGNAL(iconChanged()));

    connect(d->page,SIGNAL(loadStarted()),this,SIGNAL(loadStarted()));
    connect(d->page,SIGNAL(loadProgress(int)),this,SLOT(doLoadProgress(int)));
    connect(d->page,SIGNAL(loadFinished(bool)),this,SLOT(doLoadFinished(bool)));
    connect(d->page,SIGNAL(statusBarMessage(QString)),this,SLOT(setStatusBarMessage(QString)));
}

void QFxWebView::load(const QNetworkRequest &request,
          QNetworkAccessManager::Operation operation,
          const QByteArray &body)
{
    page()->mainFrame()->load(request, operation, body);
}

QString QFxWebView::html() const
{
    return page()->mainFrame()->toHtml();
}

/*!
    \qmlproperty string WebView::html
    This property holds HTML text set directly

    The html property can be set as a string (using CDATA for large blocks),
    or as xhtml inline using the XML namespace http://www.w3.org/1999/xhtml:

    \code
    <WebView>
        <html xmlns="http://www.w3.org/1999/xhtml">
            <p>This is valid xHTML.</p>
        </html>
    </WebView>
    \endcode

    \code
    <WebView>
        <html>&lt;CDATA[
        <p>This is just HTML.
    ]]&gt;html>
    </WebView>
    \endcode
*/
void QFxWebView::setHtml(const QString &html, const QUrl &baseUrl)
{
    Q_D(QFxWebView);
    d->page->setViewportSize(QSize(
        d->idealwidth>0 ? d->idealwidth : width(),
        d->idealheight>0 ? d->idealheight : height()));
    if (isComponentComplete())
        d->page->mainFrame()->setHtml(html, baseUrl);
    else {
        d->pending = d->PendingHtml;
        d->pending_url = baseUrl;
        d->pending_string = html;
    }
}

void QFxWebView::setContent(const QByteArray &data, const QString &mimeType, const QUrl &baseUrl)
{
    Q_D(QFxWebView);
    d->page->setViewportSize(QSize(
        d->idealwidth>0 ? d->idealwidth : width(),
        d->idealheight>0 ? d->idealheight : height()));

    if (isComponentComplete())
        d->page->mainFrame()->setContent(data,mimeType,baseUrl);
    else {
        d->pending = d->PendingContent;
        d->pending_url = baseUrl;
        d->pending_string = mimeType;
        d->pending_data = data;
    }
}

QWebHistory *QFxWebView::history() const
{
    return page()->history();
}

QWebSettings *QFxWebView::settings() const
{
    return page()->settings();
}

/*!
    \internal
    \class QFxWebPage
    \brief The QFxWebPage class is a QWebPage that can create QML plugins.

    \sa QFxWebView
*/
QFxWebPage::QFxWebPage(QFxWebView *parent) :
    QWebPage(parent)
{
}

QFxWebPage::~QFxWebPage()
{
}

/*
    Qt WebKit does not understand non-QWidget plugins, so dummy widgets
    are created, parented to a single dummy tool window.

    The requirements for QML object plugins are input to the Qt WebKit
    non-QWidget plugin support, which will obsolete this kludge.
*/
class QWidget_Dummy_Plugin : public QWidget
{
    Q_OBJECT
public:
    static QWidget *dummy_shared_parent()
    {
        static QWidget *dsp = 0;
        if (!dsp) {
            dsp = new QWidget(0,Qt::Tool);
            dsp->setGeometry(-10000,-10000,0,0);
            dsp->show();
        }
        return dsp;
    }
    QWidget_Dummy_Plugin(const QUrl& url, QFxWebView *view, const QStringList &paramNames, const QStringList &paramValues) :
        QWidget(dummy_shared_parent()),
        propertyNames(paramNames),
        propertyValues(paramValues),
        webview(view)
    {
        QmlEngine *engine = webview->itemContext()->engine();
        component = new QmlComponent(engine, url, this);
        item = 0;
        connect(engine, SIGNAL(statusChanged(Status)), this, SLOT(qmlLoaded()));
    }

public Q_SLOTS:
    void qmlLoaded()
    {
        item = qobject_cast<QFxItem*>(component->create(webview->itemContext()));
        item->setParent(webview);
        for (int i=0; i<propertyNames.count(); ++i) {
            if (propertyNames[i] != QLatin1String("type") && propertyNames[i] != QLatin1String("data")) {
                item->setProperty(propertyNames[i].toLatin1(),propertyValues[i]);
            }
        }
        resizeEvent(0);
        delete component;
        component = 0;
    }
    void resizeEvent(QResizeEvent*)
    {
        if (item) {
            item->setX(x());
            item->setY(y());
            item->setWidth(width());
            item->setHeight(height());
        }
    }

private:
    QmlComponent *component;
    QFxItem *item;
    QStringList propertyNames, propertyValues;
    QFxWebView *webview;
};

QFxWebView *QFxWebPage::view()
{
    return static_cast<QFxWebView*>(parent());
}

QObject *QFxWebPage::createPlugin(const QString &, const QUrl &url, const QStringList &paramNames, const QStringList &paramValues)
{
    QUrl comp = view()->itemContext()->resolvedUri(url.toString());
    return new QWidget_Dummy_Plugin(comp,view(),paramNames,paramValues);
}

#include "qfxwebview.moc"

QT_END_NAMESPACE