html_imageimpl.cpp

khtml在gtk上的移植版本

void HTMLImageElementImpl::attach()
{
    HTMLElementImpl::attach();

    if (renderer()) {
        RenderImage* imageObj = static_cast<RenderImage*>(renderer());
        imageObj->setImage(m_imageLoader.image());
    }

    if (getDocument()->isHTMLDocument()) {
        HTMLDocumentImpl *document = static_cast<HTMLDocumentImpl *>(getDocument());
        document->addNamedImageOrForm(oldIdAttr);
        document->addNamedImageOrForm(oldNameAttr);
    }
}

void HTMLImageElementImpl::detach()
{
    if (getDocument()->isHTMLDocument()) {
        HTMLDocumentImpl *document = static_cast<HTMLDocumentImpl *>(getDocument());
        document->removeNamedImageOrForm(oldIdAttr);
        document->removeNamedImageOrForm(oldNameAttr);
    }

    HTMLElementImpl::detach();
}

long HTMLImageElementImpl::width() const
{
    if (!m_render) {
	// check the attribute first for an explicit pixel value
	DOM::DOMString attrWidth = getAttribute(ATTR_WIDTH);
	bool ok;
	long width = attrWidth.string().toLong(&ok);
	if (ok) {
	  return width;
	}
    }

    DOM::DocumentImpl* docimpl = getDocument();
    if (docimpl) {
	docimpl->updateLayout();
    }

    if (!m_render) {
	return 0;
    }

    return m_render->contentWidth();
}

long HTMLImageElementImpl::height() const
{
    if (!m_render) {
	// check the attribute first for an explicit pixel value
	DOM::DOMString attrHeight = getAttribute(ATTR_HEIGHT);
	bool ok;
	long height = attrHeight.string().toLong(&ok);
	if (ok) {
	  return height;
	}
    }

    DOM::DocumentImpl* docimpl = getDocument();
    if (docimpl) {
	docimpl->updateLayout();
    }

    if (!m_render) {
	return 0;
    }

    return m_render->contentHeight();
}

QImage HTMLImageElementImpl::currentImage() const
{
    RenderImage *r = static_cast<RenderImage*>(renderer());
    if (r)
        return r->pixmap().convertToImage();
    return QImage();
}

bool HTMLImageElementImpl::isURLAttribute(AttributeImpl *attr) const
{
    return (attr->id() == ATTR_SRC || (attr->id() == ATTR_USEMAP && attr->value().domString()[0] != '#'));
}

// -------------------------------------------------------------------------

HTMLMapElementImpl::HTMLMapElementImpl(DocumentPtr *doc)
    : HTMLElementImpl(doc)
{
}

HTMLMapElementImpl::~HTMLMapElementImpl()
{
    if (getDocument())
        getDocument()->removeImageMap(this);
}

NodeImpl::Id HTMLMapElementImpl::id() const
{
    return ID_MAP;
}

bool
HTMLMapElementImpl::mapMouseEvent(int x_, int y_, int width_, int height_,
                                  RenderObject::NodeInfo& info)
{
    //cout << "map:mapMouseEvent " << endl;
    //cout << x_ << " " << y_ <<" "<< width_ <<" "<< height_ << endl;
    QPtrStack<NodeImpl> nodeStack;

    NodeImpl *current = firstChild();
    while(1)
    {
        if(!current)
        {
            if(nodeStack.isEmpty()) break;
            current = nodeStack.pop();
            current = current->nextSibling();
            continue;
        }
        if(current->id()==ID_AREA)
        {
            //cout << "area found " << endl;
            HTMLAreaElementImpl* area=static_cast<HTMLAreaElementImpl*>(current);
            if (area->mapMouseEvent(x_,y_,width_,height_, info))
                return true;
        }
        NodeImpl *child = current->firstChild();
        if(child)
        {
            nodeStack.push(current);
            current = child;
        }
        else
        {
            current = current->nextSibling();
        }
    }

    return false;
}

void HTMLMapElementImpl::parseHTMLAttribute(HTMLAttributeImpl *attr)
{
    switch (attr->id())
    {
    case ATTR_ID:
        // Must call base class so that hasID bit gets set.
        HTMLElementImpl::parseHTMLAttribute(attr);
        if (getDocument()->htmlMode() != DocumentImpl::XHtml) break;
        // fall through
    case ATTR_NAME:
        getDocument()->removeImageMap(this);
        name = attr->value();
        if (name.length() != 0 && name[0] == '#')
            name.remove(0, 1);
        getDocument()->addImageMap(this);
        break;
    default:
        HTMLElementImpl::parseHTMLAttribute(attr);
    }
}

// -------------------------------------------------------------------------

HTMLAreaElementImpl::HTMLAreaElementImpl(DocumentPtr *doc)
    : HTMLAnchorElementImpl(doc)
{
    m_coords=0;
    m_coordsLen = 0;
    shape = Unknown;
    lasth = lastw = -1;
}

HTMLAreaElementImpl::~HTMLAreaElementImpl()
{
    if (m_coords) delete [] m_coords;
}

NodeImpl::Id HTMLAreaElementImpl::id() const
{
    return ID_AREA;
}

void HTMLAreaElementImpl::parseHTMLAttribute(HTMLAttributeImpl *attr)
{
    switch (attr->id())
    {
    case ATTR_SHAPE:
        if ( strcasecmp( attr->value(), "default" ) == 0 )
            shape = Default;
        else if ( strcasecmp( attr->value(), "circle" ) == 0 )
            shape = Circle;
        else if ( strcasecmp( attr->value(), "poly" ) == 0 )
            shape = Poly;
        else if ( strcasecmp( attr->value(), "rect" ) == 0 )
            shape = Rect;
        break;
    case ATTR_COORDS:
        if (m_coords) delete [] m_coords;
        m_coords = attr->value().toLengthArray(m_coordsLen);
        break;
    case ATTR_TARGET:
        m_hasTarget = !attr->isNull();
        break;
    case ATTR_ALT:
        break;
    case ATTR_ACCESSKEY:
        break;
    default:
        HTMLAnchorElementImpl::parseHTMLAttribute(attr);
    }
}

bool HTMLAreaElementImpl::mapMouseEvent(int x_, int y_, int width_, int height_,
                                   RenderObject::NodeInfo& info)
{
    bool inside = false;
    if (width_ != lastw || height_ != lasth)
    {
        region=getRegion(width_, height_);
        lastw=width_; lasth=height_;
    }
    if (region.contains(QPoint(x_,y_)))
    {
        inside = true;
        info.setInnerNode(this);
        info.setURLElement(this);
    }

    return inside;
}

QRect HTMLAreaElementImpl::getRect(RenderObject* obj) const
{
    int dx, dy;
    obj->absolutePosition(dx, dy);
    QRegion region = getRegion(lastw,lasth);
    region.translate(dx, dy);
    return region.boundingRect();
}

QRegion HTMLAreaElementImpl::getRegion(int width_, int height_) const
{
    QRegion region;
    if (!m_coords)
        return region;

    // added broken HTML support (Dirk): some pages omit the SHAPE
    // attribute, so we try to guess by looking at the coords count
    // what the HTML author tried to tell us.

    // a Poly needs at least 3 points (6 coords), so this is correct
    if ((shape==Poly || shape==Unknown) && m_coordsLen > 5) {
        // make sure its even
        int len = m_coordsLen >> 1;
        QPointArray points(len);
        for (int i = 0; i < len; ++i)
            points.setPoint(i, m_coords[(i<<1)].minWidth(width_),
                            m_coords[(i<<1)+1].minWidth(height_));
        region = QRegion(points);
    }
    else if (shape==Circle && m_coordsLen>=3 || shape==Unknown && m_coordsLen == 3) {
        int r = kMin(m_coords[2].minWidth(width_), m_coords[2].minWidth(height_));
        region = QRegion(m_coords[0].minWidth(width_)-r,
                         m_coords[1].minWidth(height_)-r, 2*r, 2*r,QRegion::Ellipse);
    }
    else if (shape==Rect && m_coordsLen>=4 || shape==Unknown && m_coordsLen == 4) {
        int x0 = m_coords[0].minWidth(width_);
        int y0 = m_coords[1].minWidth(height_);
        int x1 = m_coords[2].minWidth(width_);
        int y1 = m_coords[3].minWidth(height_);
        region = QRegion(x0,y0,x1-x0,y1-y0);
    }
    else if (shape==Default)
        region = QRegion(0,0,width_,height_);
    // else
       // return null region

    return region;
}