new 'justify' tool + rename ImageUtils -> img2aa

[fanfix.git] / src / be / nikiroo / utils / main / justify.java

diff --git a/src/be/nikiroo/utils/main/justify.java b/src/be/nikiroo/utils/main/justify.java
new file mode 100644 (file)
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) == '»';
+       }
+}