private boolean containsMostlyLetters(BxLine line) {
double letterCount = 0;
for (char ch : line.toText().toCharArray()) {
if (Character.isLetter(ch)) letterCount++;
}
return 2 * letterCount > line.toText().length();
}
private boolean shouldBeRemoved(
BxLine line,
Population heightPopulation,
Population fontPopulation,
Population distancePopulation,
Population indentationPopulation) {
if (line.getMostPopularFontName() == null) {
return true;
}
if (heightPopulation.getZScore(line.getHeight()) < candMinHeightZScore) {
return true;
}
if (looksLikeEquation(line)) {
return true;
}
if (looksLikeFigure(line)) {
return true;
}
if (looksLikeTable(line)) {
return true;
}
if (!containsMostlyLetters(line)) {
return true;
}
if (!containsWord(line)) {
return true;
}
if (startsWithLargeNumber(line)) {
return true;
}
if (heightPopulation.getZScore(line.getHeight()) < outlHeightZScore
&& Math.abs(fontPopulation.getZScore(getFontIndex(line))) < outlFontZScore
&& (!line.hasPrev()
|| distancePopulation.getZScore(line.getY() - line.getPrev().getY())
< outlDistanceZScore)
&& Math.abs(indentationPopulation.getZScore(line.getX())) < outlIndentZScore) {
return true;
}
int i = 0;
BxLine actLine = line;
while (actLine.hasNext()) {
actLine = actLine.getNext();
if (actLine.toText().matches("[A-Z].*")) {
break;
}
if (i++ == maxHeaderLineCount) {
return true;
}
}
return false;
}
public void cleanupContent(BxDocContentStructure contentStructure) {
for (BxDocContentPart contentPart : contentStructure.getParts()) {
List<BxLine> headerLines = contentPart.getHeaderLines();
StringBuilder sb = new StringBuilder();
for (BxLine headerLine : headerLines) {
String lineText = headerLine.toText();
if (lineText.endsWith("-")) {
lineText = lineText.substring(0, lineText.length() - 1);
if (lineText.lastIndexOf(' ') < 0) {
sb.append(lineText);
} else {
sb.append(lineText.substring(0, lineText.lastIndexOf(' ')));
sb.append(" ");
sb.append(lineText.substring(lineText.lastIndexOf(' ') + 1));
}
} else {
sb.append(lineText);
sb.append(" ");
}
}
contentPart.setCleanHeaderText(cleanLigatures(sb.toString().trim()));
List<BxLine> contentLines = contentPart.getContentLines();
List<String> contentTexts = new ArrayList<String>();
double maxLen = Double.NEGATIVE_INFINITY;
for (BxLine line : contentLines) {
if (line.getWidth() > maxLen) {
maxLen = line.getWidth();
}
}
String contentText = "";
for (BxLine line : contentLines) {
int score = 0;
BxLine prev = line.getPrev();
BxLine next = line.getNext();
if (line.toText().matches("^[A-Z].*$")) {
score++;
}
if (prev != null) {
if (line.getX() > prev.getX()
&& line.getX() - prev.getX() < paragraphLineIndentMultiplier * maxLen
&& line.getX() - prev.getX() > minParagraphIndent) {
score++;
}
if (prev.getWidth() < lastParagraphLineLengthMult * maxLen) {
score++;
}
if (prev.toText().endsWith(".")) {
score++;
}
}
if (next != null
&& line.getX() > next.getX()
&& line.getX() - next.getX() < paragraphLineIndentMultiplier * maxLen
&& line.getX() - next.getX() > minParagraphIndent) {
score++;
}
if (score >= firstParagraphLineMinScore) {
if (!contentText.isEmpty()) {
contentTexts.add(cleanLigatures(contentText.trim()));
}
contentText = "";
}
String lineText = line.toText();
if (lineText.endsWith("-")) {
lineText = lineText.substring(0, lineText.length() - 1);
if (lineText.lastIndexOf(' ') < 0) {
contentText += lineText;
} else {
contentText += lineText.substring(0, lineText.lastIndexOf(' '));
contentText += "\n";
contentText += lineText.substring(lineText.lastIndexOf(' ') + 1);
}
} else {
contentText += lineText;
contentText += "\n";
}
}
if (!contentText.isEmpty()) {
contentTexts.add(cleanLigatures(contentText.trim()));
}
contentPart.setCleanContentTexts(contentTexts);
}
}
private boolean startsWithLargeNumber(BxLine line) {
return line.toText().matches("[0-9][0-9].*");
}
private boolean containsWord(BxLine line) {
return line.toText().toLowerCase().matches(".*[a-z][a-z][a-z][a-z].*");
}
private boolean looksLikeTable(BxLine line) {
return line.toText().toLowerCase().matches("table .*");
}
private boolean looksLikeFigure(BxLine line) {
return line.toText().toLowerCase().matches("fig\\.? .*")
|| line.toText().toLowerCase().matches("figure .*");
}
private boolean looksLikeEquation(BxLine line) {
return line.toText().contains("=");
}
private boolean looksLikeHeader(BxLine line) {
String text = line.toText();
return text.matches("^[A-Z].*")
|| text.matches("^[1-9].*[a-zA-Z].*")
|| text.matches("^[a-h]\\).*[a-zA-Z].*");
}
@Override
public double calculateFeatureValue(BxLine line, BxPage page) {
return (line.toText().matches("^[a-z]\\) [A-Z].*$")) ? 1 : 0;
}