qwebframe.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

}

#ifndef QT_NO_PRINTER
/*!
    Prints the frame to the given \a printer.

    \sa render()
*/
void QWebFrame::print(QPrinter *printer) const
{
    QPainter painter;
    if (!painter.begin(printer))
        return;

    const qreal zoomFactorX = printer->logicalDpiX() / qt_defaultDpi();
    const qreal zoomFactorY = printer->logicalDpiY() / qt_defaultDpi();

    PrintContext printContext(d->frame);
    float pageHeight = 0;

    QRect qprinterRect = printer->pageRect();

    IntRect pageRect(0, 0,
                     int(qprinterRect.width() / zoomFactorX),
                     int(qprinterRect.height() / zoomFactorY));

    printContext.begin(pageRect.width());

    printContext.computePageRects(pageRect, /*headerHeight*/0, /*footerHeight*/0, /*userScaleFactor*/1.0, pageHeight);

    int docCopies;
    int pageCopies;
    if (printer->collateCopies() == true){
        docCopies = 1;
        pageCopies = printer->numCopies();
    } else {
        docCopies = printer->numCopies();
        pageCopies = 1;
    }

    int fromPage = printer->fromPage();
    int toPage = printer->toPage();
    bool ascending = true;

    if (fromPage == 0 && toPage == 0) {
        fromPage = 1;
        toPage = printContext.pageCount();
    }
    // paranoia check
    fromPage = qMax(1, fromPage);
    toPage = qMin(printContext.pageCount(), toPage);

    if (printer->pageOrder() == QPrinter::LastPageFirst) {
        int tmp = fromPage;
        fromPage = toPage;
        toPage = tmp;
        ascending = false;
    }

    painter.scale(zoomFactorX, zoomFactorY);
    GraphicsContext ctx(&painter);

    for (int i = 0; i < docCopies; ++i) {
        int page = fromPage;
        while (true) {
            for (int j = 0; j < pageCopies; ++j) {
                if (printer->printerState() == QPrinter::Aborted
                    || printer->printerState() == QPrinter::Error) {
                    printContext.end();
                    return;
                }
                printContext.spoolPage(ctx, page - 1, pageRect.width());
                if (j < pageCopies - 1)
                    printer->newPage();
            }

            if (page == toPage)
                break;

            if (ascending)
                ++page;
            else
                --page;

            printer->newPage();
        }

        if ( i < docCopies - 1)
            printer->newPage();
    }

    printContext.end();
}
#endif // QT_NO_PRINTER

/*!
    Evaluates the JavaScript defined by \a scriptSource using this frame as context
    and returns the result of the last executed statement.

    \sa addToJavaScriptWindowObject(), javaScriptWindowObjectCleared()
*/
QVariant QWebFrame::evaluateJavaScript(const QString& scriptSource)
{
    ScriptController *proxy = d->frame->script();
    QVariant rc;
    if (proxy) {
        JSC::JSValuePtr v = proxy->evaluate(ScriptSourceCode(scriptSource)).jsValue();
        if (v) {
            int distance = 0;
            rc = JSC::Bindings::convertValueToQVariant(proxy->globalObject()->globalExec(), v, QMetaType::Void, &distance);
        }
    }
    return rc;
}

/*!
    \since 4.5

    Returns the frame's security origin.
*/
QWebSecurityOrigin QWebFrame::securityOrigin() const
{
    QWebFrame* that = const_cast<QWebFrame*>(this);
    QWebSecurityOriginPrivate* priv = new QWebSecurityOriginPrivate(QWebFramePrivate::core(that)->document()->securityOrigin());
    return QWebSecurityOrigin(priv);
}

WebCore::Frame* QWebFramePrivate::core(QWebFrame* webFrame)
{
    return webFrame->d->frame;
}

QWebFrame* QWebFramePrivate::kit(WebCore::Frame* coreFrame)
{
    return static_cast<FrameLoaderClientQt*>(coreFrame->loader()->client())->webFrame();
}


/*!
    \fn void QWebFrame::javaScriptWindowObjectCleared()

    This signal is emitted whenever the global window object of the JavaScript
    environment is cleared, e.g., before starting a new load.

    If you intend to add QObjects to a QWebFrame using
    addToJavaScriptWindowObject(), you should add them in a slot connected
    to this signal. This ensures that your objects remain accessible when
    loading new URLs.
*/

/*!
    \fn void QWebFrame::provisionalLoad()
    \internal
*/

/*!
    \fn void QWebFrame::titleChanged(const QString &title)

    This signal is emitted whenever the title of the frame changes.
    The \a title string specifies the new title.

    \sa title()
*/

/*!
    \fn void QWebFrame::urlChanged(const QUrl &url)

    This signal is emitted with the URL of the frame when the frame's title is
    received. The new URL is specified by \a url.

    \sa url()
*/

/*!
    \fn void QWebFrame::initialLayoutCompleted()

    This signal is emitted when the frame is laid out the first time.
    This is the first time you will see contents displayed on the frame.

    \note A frame can be laid out multiple times.
*/

/*!
  \fn void QWebFrame::iconChanged()

  This signal is emitted when the icon ("favicon") associated with the frame
  has been loaded.

  \sa icon()
*/

/*!
  \fn void QWebFrame::contentsSizeChanged(const QSize &size)
  \since 4.6

  This signal is emitted when the frame's contents size changes.

  \sa contentsSize()
*/

/*!
    \class QWebHitTestResult
    \since 4.4
    \brief The QWebHitTestResult class provides information about the web
    page content after a hit test.

    QWebHitTestResult is returned by QWebFrame::hitTestContent() to provide
    information about the content of the web page at the specified position.
*/

/*!
    \internal
*/
QWebHitTestResult::QWebHitTestResult(QWebHitTestResultPrivate *priv)
    : d(priv)
{
}

QWebHitTestResultPrivate::QWebHitTestResultPrivate(const WebCore::HitTestResult &hitTest)
    : isContentEditable(false)
    , isContentSelected(false)
    , isScrollBar(false)
{
    if (!hitTest.innerNode())
        return;
    pos = hitTest.point();
    boundingRect = hitTest.boundingBox();
    title = hitTest.title();
    linkText = hitTest.textContent();
    linkUrl = hitTest.absoluteLinkURL();
    linkTitle = hitTest.titleDisplayString();
    alternateText = hitTest.altDisplayString();
    imageUrl = hitTest.absoluteImageURL();
    innerNode = hitTest.innerNode();
    innerNonSharedNode = hitTest.innerNonSharedNode();
    WebCore::Image *img = hitTest.image();
    if (img) {
        QPixmap *pix = img->nativeImageForCurrentFrame();
        if (pix)
            pixmap = *pix;
    }
    WebCore::Frame *wframe = hitTest.targetFrame();
    if (wframe)
        linkTargetFrame = QWebFramePrivate::kit(wframe);
    Element* urlElement = hitTest.URLElement();
    if (urlElement)
        linkTarget = urlElement->target();

    isContentEditable = hitTest.isContentEditable();
    isContentSelected = hitTest.isSelected();
    isScrollBar = hitTest.scrollbar();

    if (innerNonSharedNode && innerNonSharedNode->document()
        && innerNonSharedNode->document()->frame())
        frame = QWebFramePrivate::kit(innerNonSharedNode->document()->frame());

    if (Node *block = WebCore::enclosingBlock(innerNode.get())) {
        RenderObject *renderBlock = block->renderer();
        while (renderBlock && renderBlock->isListItem())
            renderBlock = renderBlock->containingBlock();

        if (renderBlock)
            enclosingBlock = renderBlock->absoluteClippedOverflowRect();
    }
}

/*!
    Constructs a null hit test result.
*/
QWebHitTestResult::QWebHitTestResult()
    : d(0)
{
}

/*!
    Constructs a hit test result from \a other.
*/
QWebHitTestResult::QWebHitTestResult(const QWebHitTestResult &other)
    : d(0)
{
    if (other.d)
        d = new QWebHitTestResultPrivate(*other.d);
}

/*!
    Assigns the \a other hit test result to this.
*/
QWebHitTestResult &QWebHitTestResult::operator=(const QWebHitTestResult &other)
{
    if (this != &other) {
        if (other.d) {
            if (!d)
                d = new QWebHitTestResultPrivate;
            *d = *other.d;
        } else {
            delete d;
            d = 0;
        }
    }
    return *this;
}

/*!
    Destructor.
*/
QWebHitTestResult::~QWebHitTestResult()
{
    delete d;
}

/*!
    Returns true if the hit test result is null; otherwise returns false.
*/
bool QWebHitTestResult::isNull() const
{
    return !d;
}

/*!
    Returns the position where the hit test occured.
*/
QPoint QWebHitTestResult::pos() const
{
    if (!d)
        return QPoint();
    return d->pos;
}

/*!
    \since 4.5
    Returns the bounding rect of the element.
*/
QRect QWebHitTestResult::boundingRect() const
{
    if (!d)
        return QRect();
    return d->boundingRect;
}

/*!
    \since 4.6
    Returns the rect of the smallest enclosing block element.
*/
QRect QWebHitTestResult::enclosingBlock() const
{
    if (!d)
        return QRect();
    return d->enclosingBlock;
}

/*!
    Returns the title of the nearest enclosing HTML element.
*/
QString QWebHitTestResult::title() const
{
    if (!d)
        return QString();
    return d->title;
}

/*!
    Returns the text of the link.
*/
QString QWebHitTestResult::linkText() const
{
    if (!d)
        return QString();
    return d->linkText;
}

/*!
    Returns the url to which the link points to.
*/
QUrl QWebHitTestResult::linkUrl() const
{
    if (!d)
        return QUrl();
    return d->linkUrl;
}

/*!
    Returns the title of the link.
*/
QUrl QWebHitTestResult::linkTitle() const
{
    if (!d)
        return QUrl();
    return d->linkTitle;
}

/*!
  \since 4.6
  Returns the name of the target frame that will load the link if it is activated.

  \sa linkTargetFrame
*/
QString QWebHitTestResult::linkTarget() const
{
    if (!d)
        return 0;
    return d->linkTarget;
}

/*!
    Returns the frame that will load the link if it is activated.

    \sa linkTarget
*/
QWebFrame *QWebHitTestResult::linkTargetFrame() const
{
    if (!d)
        return 0;
    return d->linkTargetFrame;
}

/*!
    Returns the alternate text of the element. This corresponds to the HTML alt attribute.
*/
QString QWebHitTestResult::alternateText() const
{
    if (!d)
        return QString();
    return d->alternateText;
}

/*!
    Returns the url of the image.
*/
QUrl QWebHitTestResult::imageUrl() const
{
    if (!d)
        return QUrl();
    return d->imageUrl;
}

/*!
    Returns a QPixmap containing the image. A null pixmap is returned if the
    element being tested is not an image.
*/
QPixmap QWebHitTestResult::pixmap() const
{
    if (!d)
        return QPixmap();
    return d->pixmap;
}

/*!
    Returns true if the content is editable by the user; otherwise returns false.
*/
bool QWebHitTestResult::isContentEditable() const
{
    if (!d)
        return false;
    return d->isContentEditable;
}

/*!
    Returns true if the content tested is part of the selection; otherwise returns false.
*/
bool QWebHitTestResult::isContentSelected() const
{
    if (!d)
        return false;
    return d->isContentSelected;
}

/*!
    Returns the frame the hit test was executed in.
*/
QWebFrame *QWebHitTestResult::frame() const
{
    if (!d)
        return 0;
    return d->frame;
}

/*!
    \since 4.6
    Returns true if the test includes a scrollbar.
*/
bool QWebHitTestResult::isScrollBar() const
{
    if (!d)
        return false;
    return d->isScrollBar;
}