X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2Fmain%2Fjustify.java;fp=src%2Fbe%2Fnikiroo%2Futils%2Fmain%2Fjustify.java;h=cf589059a5ebf398cea085fcfc06913067e32d73;hb=9e50696ec75e70b4eb592a9a1b6fceacf169977f;hp=0000000000000000000000000000000000000000;hpb=ce060f5a4fcbea33cbecf2e8696fde7db183bff0;p=nikiroo-utils.git

diff --git a/src/be/nikiroo/utils/main/justify.java b/src/be/nikiroo/utils/main/justify.java
new file mode 100644
index 0000000..cf58905
--- /dev/null
+++ b/src/be/nikiroo/utils/main/justify.java
@@ -0,0 +1,95 @@
+package be.nikiroo.utils.main;
+
+import java.util.ArrayList;
+import java.util.List;
+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)
+	 * <p>
+	 * <ul>
+	 * <li>mode: left, right, center or full justification (defaults to left)</li>
+	 * <li>max width: the maximum width of a line, or "" for "no maximum"
+	 * (defaults to "no maximum")</li>
+	 * </ul>
+	 * 
+	 * @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?
+		List<String> lines = new ArrayList<String>();
+		Scanner scan = new Scanner(System.in);
+		scan.useDelimiter("[\r\n]");
+		try {
+			StringBuilder previous = null;
+			StringBuilder tmp = new StringBuilder();
+			while (scan.hasNext()) {
+				String current = scan.next();
+				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();
+
+				if (previous == null) {
+					previous = new StringBuilder();
+				} else {
+					if (current.isEmpty() || isFullLine(previous)) {
+						lines.add(previous.toString());
+						previous.setLength(0);
+					} else {
+						previous.append(' ');
+					}
+				}
+
+				previous.append(current);
+			}
+
+			if (previous != null) {
+				lines.add(previous.toString());
+			}
+		} finally {
+			scan.close();
+		}
+
+		// TODO: supports bullet lines "- xxx" and sub levels
+		for (String line : lines) {
+			for (String subline : StringUtils.justifyText(line, width, align)) {
+				System.out.println(subline);
+			}
+		}
+	}
+
+	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) == '»';
+	}
+}