package be.nikiroo.utils.main;
import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
import java.util.Scanner;
import be.nikiroo.utils.StringUtils;
import be.nikiroo.utils.StringUtils.Alignment;
/**
* Text justification (left, right, center, justify).
*
* @author niki
*/
public class justify {
/**
* Syntax: $0 ([left|right|center|justify]) (max width)
*
*
* - mode: left, right, center or full justification (defaults to left)
* - max width: the maximum width of a line, or "" for "no maximum"
* (defaults to "no maximum")
*
*
* @param args
*/
public static void main(String[] args) {
int width = -1;
StringUtils.Alignment align = Alignment.LEFT;
if (args.length >= 1) {
align = Alignment.valueOf(args[0].toUpperCase());
}
if (args.length >= 2) {
width = Integer.parseInt(args[1]);
}
// TODO: move to utils?
// Content <-> Bullet spacing (null = no spacing)
List> lines = new ArrayList>();
Scanner scan = new Scanner(System.in);
scan.useDelimiter("\r\n|[\r\n]");
try {
StringBuilder previous = null;
StringBuilder tmp = new StringBuilder();
String previousItemBulletSpacing = null;
String itemBulletSpacing = null;
while (scan.hasNext()) {
boolean previousLineComplete = true;
String current = scan.next().replace("\t", " ");
itemBulletSpacing = getItemSpacing(current);
boolean bullet = isItemLine(current);
if ((previousItemBulletSpacing == null || itemBulletSpacing
.length() <= previousItemBulletSpacing.length())
&& !bullet) {
itemBulletSpacing = null;
}
if (itemBulletSpacing != null) {
current = current.trim();
if (!current.isEmpty() && bullet) {
current = current.substring(1);
}
current = current.trim();
previousLineComplete = bullet;
} else {
tmp.setLength(0);
for (String word : current.split(" ")) {
if (word.isEmpty()) {
continue;
}
if (tmp.length() > 0) {
tmp.append(' ');
}
tmp.append(word.trim());
}
current = tmp.toString();
previousLineComplete = current.isEmpty()
|| previousItemBulletSpacing != null
|| (previous != null && isFullLine(previous));
}
if (previous == null) {
previous = new StringBuilder();
} else {
if (previousLineComplete) {
lines.add(new AbstractMap.SimpleEntry(
previous.toString(), previousItemBulletSpacing));
previous.setLength(0);
previousItemBulletSpacing = itemBulletSpacing;
} else {
previous.append(' ');
}
}
previous.append(current);
}
if (previous != null) {
lines.add(new AbstractMap.SimpleEntry(previous
.toString(), previousItemBulletSpacing));
}
} finally {
scan.close();
}
for (Entry line : lines) {
String content = line.getKey();
String spacing = line.getValue();
String bullet = "- ";
if (spacing == null) {
bullet = "";
spacing = "";
}
if (spacing.length() > width + 3) {
spacing = "";
}
for (String subline : StringUtils.justifyText(content, width
- (spacing.length() + bullet.length()), align)) {
System.out.println(spacing + bullet + subline);
if (!bullet.isEmpty()) {
bullet = " ";
}
}
}
}
static private boolean isFullLine(StringBuilder line) {
return line.length() == 0 //
|| line.charAt(line.length() - 1) == '.'
|| line.charAt(line.length() - 1) == '"'
|| line.charAt(line.length() - 1) == 'ยป';
}
static private boolean isItemLine(String line) {
String spacing = getItemSpacing(line);
return spacing != null && line.charAt(spacing.length()) == '-';
}
static private String getItemSpacing(String line) {
int i;
for (i = 0; i < line.length(); i++) {
if (line.charAt(i) != ' ') {
return line.substring(0, i);
}
}
return "";
}
}