optimize line breaks and value parsing

src/main/java/de/marhali/easyi18n/io/parser/properties/PropertiesParserStrategy.java

@@ -52,9 +52,8 @@ public class PropertiesParserStrategy extends ParserStrategy {
         PropertiesMapper.write(file.getLocale(), output, targetData, converter);
 
         try(StringWriter writer = new StringWriter()) {
-            output.store(writer, null);
-            // Current implementation only works with \n line separators (IntelliJ Document Formatting)
-            return writer.toString().replaceAll("\r\n", "\n");
+            output.store(writer);
+            return writer.toString();
         }
     }
 }

src/main/java/de/marhali/easyi18n/io/parser/properties/SortableProperties.java

@@ -1,5 +1,12 @@
 package de.marhali.easyi18n.io.parser.properties;
 
+import de.marhali.easyi18n.util.IntelliJBufferedWriter;
+
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.Writer;
 import java.util.*;
 
 /**
@@ -38,6 +45,95 @@ public class SortableProperties extends Properties {
         return this.properties.put(key, value);
     }
 
+    @Override
+    @Deprecated
+    public void store(OutputStream out, @Nullable String comments) throws IOException {
+        throw new UnsupportedOperationException("Not implemented");
+    }
+
+    @Override
+    @Deprecated
+    public void store(Writer writer, String comments) throws IOException {
+        throw new UnsupportedOperationException("Not implemented");
+    }
+
+    public void store(Writer writer) throws IOException {
+        IntelliJBufferedWriter bw = new IntelliJBufferedWriter(writer);
+        boolean escUnicode = false;
+
+        synchronized (this) {
+            for (Map.Entry<Object, Object> e : entrySet()) {
+                String key = String.valueOf(e.getKey());
+                String val = String.valueOf(e.getValue());
+                key = saveConvert(key, true, escUnicode);
+                /* No need to escape embedded and trailing spaces for value, hence
+                 * pass false to flag.
+                 */
+                val = saveConvert(val, false, escUnicode);
+                bw.write(key + "=" + val);
+                bw.newLine();
+            }
+        }
+        bw.flush();
+    }
+
+    /*
+     * Converts unicodes to encoded &#92;uxxxx and escapes
+     * special characters with a preceding slash
+     */
+    private String saveConvert(String theString,
+                               boolean escapeSpace,
+                               boolean escapeUnicode) {
+        int len = theString.length();
+        int bufLen = len * 2;
+        if (bufLen < 0) {
+            bufLen = Integer.MAX_VALUE;
+        }
+        StringBuilder outBuffer = new StringBuilder(bufLen);
+        for(int x=0; x<len; x++) {
+            char aChar = theString.charAt(x);
+            // Handle common case first, selecting largest block that
+            // avoids the specials below
+            if ((aChar > 61) && (aChar < 127)) {
+                if (aChar == '\\') {
+                    outBuffer.append('\\'); outBuffer.append('\\');
+                    continue;
+                }
+                outBuffer.append(aChar);
+                continue;
+            }
+            switch(aChar) {
+                case ' ':
+                    if (x == 0 || escapeSpace)
+                        outBuffer.append('\\');
+                    outBuffer.append(' ');
+                    break;
+                case '\t':outBuffer.append('\\'); outBuffer.append('t');
+                    break;
+                case '\n':outBuffer.append('\\'); outBuffer.append('n');
+                    break;
+                case '\r':outBuffer.append('\\'); outBuffer.append('r');
+                    break;
+                case '\f':outBuffer.append('\\'); outBuffer.append('f');
+                    break;
+                case '=': // Fall through
+                case ':': // Fall through
+                case '#': // Fall through
+                case '!':
+                    outBuffer.append('\\'); outBuffer.append(aChar);
+                    break;
+                default:
+                    if (((aChar < 0x0020) || (aChar > 0x007e)) & escapeUnicode ) {
+                        outBuffer.append("\\u");
+                        outBuffer.append(Integer.toHexString(aChar));
+                    } else {
+                        outBuffer.append(aChar);
+                    }
+            }
+        }
+        return outBuffer.toString();
+    }
+
     @Override
     public synchronized String toString() {
         return this.properties.toString();

src/main/java/de/marhali/easyi18n/util/IntelliJBufferedWriter.java

@@ -0,0 +1,27 @@
+package de.marhali.easyi18n.util;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.Writer;
+
+/**
+ * IntelliJ aware BufferedWriter implementation.
+ * (Document PSI uses \n as line separator)
+ * @author marhali
+ */
+public class IntelliJBufferedWriter extends BufferedWriter {
+    public IntelliJBufferedWriter(@NotNull Writer out) {
+        super(out);
+    }
+
+    public IntelliJBufferedWriter(@NotNull Writer out, int sz) {
+        super(out, sz);
+    }
+
+    @Override
+    public void newLine() throws IOException {
+        write("\n");
+    }
+}