Update version, changelog, shell script highlighting

build.gradle

@@ -25,8 +25,8 @@ android {
         applicationId "org.billthefarmer.editor"
         minSdkVersion 14
         targetSdkVersion 28
-        versionName "1.72"
-        versionCode 172
+        versionName "1.73"
+        versionCode 173
 
         buildConfigField "long", "BUILT", System.currentTimeMillis() + "L"
     }

fastlane/metadata/android/en-GB/changelogs/173.txt

@@ -0,0 +1,2 @@
+ * Add Emacs Org syntax highlighting
+ * Update shell script syntax highlighting

src/main/java/org/billthefarmer/editor/Editor.java

@@ -348,6 +348,9 @@ public class Editor extends Activity
     public final static Pattern MD_CODE = Pattern.compile
         ("(^ {4,}.+$)|(`.+?`)", Pattern.MULTILINE);
 
+    public final static Pattern SH_VAR = Pattern.compile
+        ("(\\$\\b\\w+\\b)|(\\$\\{.+?\\})|(\\$\\(.+?\\))", Pattern.MULTILINE);
+
     public final static Pattern SH_COMMENT = Pattern.compile
         ("#.*$", Pattern.MULTILINE);
 
@@ -2671,6 +2674,39 @@ private void highlightText()
                                  Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
             }
 
+            matcher.region(start, end).usePattern(SH_VAR);
+            while (matcher.find())
+            {
+                ForegroundColorSpan span = new
+                    ForegroundColorSpan(Color.MAGENTA);
+
+                // Highlight it
+                editable.setSpan(span, matcher.start(), matcher.end(),
+                                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            }
+
+            matcher.region(start, end).usePattern(OPERATOR);
+            while (matcher.find())
+            {
+                ForegroundColorSpan span = new
+                    ForegroundColorSpan(Color.CYAN);
+
+                // Highlight it
+                editable.setSpan(span, matcher.start(), matcher.end(),
+                                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            }
+
+            matcher.region(start, end).usePattern(QUOTED);
+            while (matcher.find())
+            {
+                ForegroundColorSpan span = new
+                    ForegroundColorSpan(Color.RED);
+
+                // Highlight it
+                editable.setSpan(span, matcher.start(), matcher.end(),
+                                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            }
+
             matcher.region(start, end).usePattern(SH_COMMENT);
             while (matcher.find())
             {