/**
* @return a list of constituent text lines. The list holds the logical reading-order if a
* ReadingOrderResolver was run on the original document.
*/
public List<BxLine> asLines() {
List<BxLine> ret = new ArrayList<BxLine>();
for (BxZone zone : asZones()) {
ret.addAll(zone.getLines());
}
return ret;
}
private void appendZone(Document doc, Element parent, BxZone zone, Object... hints)
throws TransformationException {
Element node = doc.createElement("Zone");
appendPropertyIfNotNull(doc, node, "ZoneID", zone.getId());
appendBounds(doc, node, "ZoneCorners", zone.getBounds(), hints);
appendPropertyIfNotNull(doc, node, "ZoneNext", zone.getNextId());
Element insetsNode = doc.createElement("ZoneInsets");
insetsNode.setAttribute("Top", "");
insetsNode.setAttribute("Bottom", "");
insetsNode.setAttribute("Left", "");
insetsNode.setAttribute("Right", "");
node.appendChild(insetsNode);
appendProperty(doc, node, "ZoneLines", "");
if (zone.getLabel() != null) {
if (ZONE_LABEL_MAP.get(zone.getLabel()) != null
&& !ZONE_LABEL_MAP.get(zone.getLabel()).isEmpty()) {
appendClassification(doc, node, ZONE_LABEL_MAP.get(zone.getLabel()).toUpperCase(), "");
} else {
throw new TransformationException("Writing down an unknown zone label: " + zone.getLabel());
}
}
for (BxLine line : zone.getLines()) {
appendLine(doc, node, line, hints);
}
parent.appendChild(node);
}
@Override
public double calculateFeatureValue(BxZone zone, BxPage page) {
double charSpace = 0.0;
for (BxLine line : zone.getLines()) {
for (BxWord word : line.getWords()) {
for (BxChunk chunk : word.getChunks()) {
charSpace += chunk.getArea();
}
}
}
double ret = zone.getArea() - charSpace;
if (ret < 0) {
return 0.0;
} else {
return ret;
}
}
