/**
* Collects the position information of the given UI object and returns a position info bean.
*
* <p>
*
* @param element the object to read the position data from
* @return the position data
*/
public static PositionBean generatePositionInfo(Element element) {
PositionBean result = new PositionBean();
result.setHeight(element.getOffsetHeight());
result.setWidth(element.getOffsetWidth());
result.setTop(element.getAbsoluteTop());
result.setLeft(element.getAbsoluteLeft());
return result;
}
/**
* Returns a position info representing the dimensions of all visible child elements of the given
* panel (excluding elements with position:absolute). If the panel has no visible child elements,
* it's outer dimensions are returned.
*
* <p>
*
* @param panel the panel
* @param levels the levels to traverse down the DOM tree
* @param includeSelf <code>true</code> to include the outer dimensions of the given panel
* @return the position info
*/
public static PositionBean getInnerDimensions(Element panel, int levels, boolean includeSelf) {
boolean first = true;
int top = 0;
int left = 0;
int bottom = 0;
int right = 0;
// if overflow is set to hidden, use the outer dimensions
if (!Overflow.HIDDEN.getCssName().equals(DomUtil.getCurrentStyle(panel, Style.overflow))) {
if (!includeSelf) {
// check for any text content
NodeList<Node> children = panel.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
if ((children.getItem(i).getNodeType() == Node.TEXT_NODE)
&& (children.getItem(i).getNodeValue().trim().length() > 0)) {
includeSelf = true;
break;
}
}
}
if (includeSelf) {
top = panel.getAbsoluteTop();
left = panel.getAbsoluteLeft();
bottom = top + panel.getOffsetHeight();
right = left + panel.getOffsetWidth();
first = false;
}
Element child = panel.getFirstChildElement();
while (child != null) {
String tagName = child.getTagName();
if (tagName.equalsIgnoreCase("br")
|| tagName.equalsIgnoreCase("tr")
|| tagName.equalsIgnoreCase("thead")
|| tagName.equalsIgnoreCase("tfoot")
|| tagName.equalsIgnoreCase("script")
|| tagName.equalsIgnoreCase("style")) {
// ignore tags with no relevant position info
child = child.getNextSiblingElement();
continue;
}
String positioning = DomUtil.getCurrentStyle(child, Style.position);
if (!Display.NONE.getCssName().equals(DomUtil.getCurrentStyle(child, Style.display))
&& !(positioning.equalsIgnoreCase(Position.ABSOLUTE.getCssName())
|| positioning.equalsIgnoreCase(Position.FIXED.getCssName()))) {
PositionBean childDimensions =
levels > 0
? getInnerDimensions(child, levels - 1, true)
: generatePositionInfo(panel);
if (first) {
first = false;
top = childDimensions.getTop();
left = childDimensions.getLeft();
bottom = top + childDimensions.getHeight();
right = left + childDimensions.getWidth();
} else {
int wTop = childDimensions.getTop();
top = top < wTop ? top : wTop;
int wLeft = childDimensions.getLeft();
left = left < wLeft ? left : wLeft;
int wBottom = wTop + childDimensions.getHeight();
bottom = bottom > wBottom ? bottom : wBottom;
int wRight = wLeft + childDimensions.getWidth();
right = right > wRight ? right : wRight;
}
}
child = child.getNextSiblingElement();
}
}
if (!first) {
PositionBean result = new PositionBean();
result.setHeight(bottom - top);
result.setWidth(right - left);
result.setTop(top);
result.setLeft(left);
return result;
} else {
return generatePositionInfo(panel);
}
}