X-Git-Url: http://www2.svjatoslav.eu/gitweb/?p=sixth.git;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fcore%2Fdocument%2FUtils.java;fp=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fcore%2Fdocument%2FUtils.java;h=4883d1de8d9d710c98b5cf6b3f153d1f4aa6be5b;hp=00166ef62e41f48cb4a936b008b3fa9d1a194646;hb=168cf05300cec2bb4c0607711b752609976b2901;hpb=9b683d223e06fc5ec9e2561c659de5a79d3a8194

diff --git a/src/main/java/eu/svjatoslav/sixth/core/document/Utils.java b/src/main/java/eu/svjatoslav/sixth/core/document/Utils.java
index 00166ef..4883d1d 100644
--- a/src/main/java/eu/svjatoslav/sixth/core/document/Utils.java
+++ b/src/main/java/eu/svjatoslav/sixth/core/document/Utils.java
@@ -4,6 +4,8 @@ import eu.svjatoslav.commons.string.String2;
 
 public class Utils {
 
+    public static final char[] whitespace = new char[]{'\n', '\r', ' ', '\t'};
+
     public static String addIndentExceptFirstLine(String input, int indent) {
         String[] lines = input.split("\\r?\\n");
 
@@ -21,7 +23,34 @@ public class Utils {
     }
 
     public static boolean isBlank(String s){
-        return s.trim().length() == 0;
+        for (char c : s.toCharArray())
+            if (!isWhitespaceChar(c)) return false;
+
+        return true;
+    }
+
+    /**
+     * @return line indent in characters or -1 if line is blank or empty
+     */
+    public static int getLineIndent(String line){
+        for (int i = 0; i < line.length(); i++) {
+            if (!isWhitespaceChar(line.charAt(i)))
+                return i;
+        }
+        return -1;
+    }
+
+    public static boolean isWhitespaceChar(char c){
+        for (char whitespaceChar : whitespace)
+            if (whitespaceChar == c) return true;
+
+        return false;
+    }
+
+    public static String removePrefix(String string, int charsToRemove){
+        String2 s = new String2(string);
+        s.trimPrefix(charsToRemove);
+        return s.toString();
     }
 
 }