Add 'src/jexer/' from commit 'cf01c92f5809a0732409e280fb0f32f27393618d'

[nikiroo-utils.git] / src / jexer / bits / MnemonicString.java

diff --git a/src/jexer/bits/MnemonicString.java b/src/jexer/bits/MnemonicString.java
index d0032b6683ad497b3d223586f45dcf7264f8d447..58575b570cf0f84330aa93859e8c36d974b798e2 100644 (file)
--- a/src/jexer/bits/MnemonicString.java
+++ b/src/jexer/bits/MnemonicString.java
@@ -3,7 +3,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (C) 2017 Kevin Lamonte
+ * Copyright (C) 2019 Kevin Lamonte
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -34,7 +34,7 @@ package jexer.bits;
  * two '&&' characters, e.g. "&File && Stuff" would be
  * "File & Stuff" with the first 'F' highlighted.
  */
-public final class MnemonicString {
+public class MnemonicString {
 
     // ------------------------------------------------------------------------
     // Variables --------------------------------------------------------------
@@ -43,13 +43,19 @@ public final class MnemonicString {
     /**
      * Keyboard shortcut to activate this item.
      */
-    private char shortcut;
+    private int shortcut;
 
     /**
      * Location of the highlighted character.
      */
     private int shortcutIdx = -1;
 
+    /**
+     * Screen location of the highlighted character (number of text cells
+     * required to display from the beginning to shortcutIdx).
+     */
+    private int screenShortcutIdx = -1;
+
     /**
      * The raw (uncolored) string.
      */
@@ -68,34 +74,40 @@ public final class MnemonicString {
     public MnemonicString(final String label) {
 
         // Setup the menu shortcut
-        String newLabel = "";
+        StringBuilder newLabel = new StringBuilder();
         boolean foundAmp = false;
         boolean foundShortcut = false;
         int scanShortcutIdx = 0;
-        for (int i = 0; i < label.length(); i++) {
-            char c = label.charAt(i);
+        int scanScreenShortcutIdx = 0;
+        for (int i = 0; i < label.length();) {
+            int c = label.codePointAt(i);
+            i += Character.charCount(c);
+
             if (c == '&') {
                 if (foundAmp) {
-                    newLabel += '&';
+                    newLabel.append('&');
                     scanShortcutIdx++;
+                    scanScreenShortcutIdx++;
                 } else {
                     foundAmp = true;
                 }
             } else {
-                newLabel += c;
+                newLabel.append(Character.toChars(c));
                 if (foundAmp) {
                     if (!foundShortcut) {
                         shortcut = c;
                         foundAmp = false;
                         foundShortcut = true;
                         shortcutIdx = scanShortcutIdx;
+                        screenShortcutIdx = scanScreenShortcutIdx;
                     }
                 } else {
                     scanShortcutIdx++;
+                    scanScreenShortcutIdx += StringUtils.width(c);
                 }
             }
         }
-        this.rawLabel = newLabel;
+        this.rawLabel = newLabel.toString();
     }
 
     // ------------------------------------------------------------------------
@@ -107,7 +119,7 @@ public final class MnemonicString {
      *
      * @return the highlighted character
      */
-    public char getShortcut() {
+    public int getShortcut() {
         return shortcut;
     }
 
@@ -120,6 +132,16 @@ public final class MnemonicString {
         return shortcutIdx;
     }
 
+    /**
+     * Get the screen location of the highlighted character.
+     *
+     * @return the number of text cells required to display from the
+     * beginning of the label to shortcutIdx
+     */
+    public int getScreenShortcutIdx() {
+        return screenShortcutIdx;
+    }
+
     /**
      * Get the raw (uncolored) string.
      *