Added support for alphabetical lists

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Next version
 
+* Added support for alphabetical lists (view only)
 * Report new messages in same thread when composing a new message
 * Use account categories for identities
 * Small improvements and minor bug fixes

app/src/main/assets/CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Next version
 
+* Added support for alphabetical lists (view only)
 * Report new messages in same thread when composing a new message
 * Use account categories for identities
 * Small improvements and minor bug fixes

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -2916,8 +2916,9 @@ public class HtmlHelper {
                                 if (level > 0)
                                     level--;
 
-                                if (list == null || ("ul".equals(list.tagName()) &&
-                                        !(ltype != null && ltype.startsWith("decimal")))) {
+                                if (list == null ||
+                                        ("ul".equals(list.tagName()) &&
+                                                !NumberSpan.isSupportedType(ltype))) {
                                     // https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ul
                                     Object ul;
                                     if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
@@ -2940,7 +2941,7 @@ public class HtmlHelper {
                                         }
                                     }
 
-                                    setSpan(ssb, new NumberSpan(bulletIndent, bulletGap, colorAccent, textSize, level, index), start, ssb.length());
+                                    setSpan(ssb, new NumberSpan(bulletIndent, bulletGap, colorAccent, textSize, level, index, ltype), start, ssb.length());
                                 }
 
                                 break;

app/src/main/java/eu/faircode/email/NumberSpan.java

@@ -25,8 +25,14 @@ import android.graphics.Typeface;
 import android.text.Layout;
 import android.text.Spanned;
 import android.text.TextPaint;
+import android.text.TextUtils;
 import android.text.style.BulletSpan;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+
 public class NumberSpan extends BulletSpan {
     private int indentWidth;
     private int level;
@@ -37,7 +43,27 @@ public class NumberSpan extends BulletSpan {
     private int numberWidth;
     private int margin;
 
+    private static final List<String> SUPPORTED_TYPES = Collections.unmodifiableList(Arrays.asList(
+            "lower-alpha", "lower-latin",
+            "upper-alpha", "upper-latin"
+    ));
+
+    // https://developer.mozilla.org/en-US/docs/Web/CSS/list-style-type
+    static boolean isSupportedType(String type) {
+        if (TextUtils.isEmpty(type))
+            return false;
+        if (type.startsWith("decimal"))
+            return true;
+        if (SUPPORTED_TYPES.contains(type))
+            return true;
+        return false;
+    }
+
     public NumberSpan(int indentWidth, int gapWidth, int color, float textSize, int level, int index) {
+        this(indentWidth, gapWidth, color, textSize, level, index, null);
+    }
+
+    public NumberSpan(int indentWidth, int gapWidth, int color, float textSize, int level, int index, String type) {
         tp = new TextPaint();
         tp.setStyle(Paint.Style.FILL);
         tp.setColor(color);
@@ -48,7 +74,22 @@ public class NumberSpan extends BulletSpan {
         this.level = level;
         this.index = index;
 
+        if (TextUtils.isEmpty(type))
+            number = index + ".";
+        else
+            switch (type) {
+                case "lower-alpha":
+                case "lower-latin":
+                    number = ((char) ((int) 'a' + index)) + ".";
+                    break;
+                case "upper-alpha":
+                case "upper-latin":
+                    number = ((char) ((int) 'A' + index)) + ".";
+                    break;
+                default:
                     number = index + ".";
+            }
+
         numberWidth = Math.round(tp.measureText(number));
         margin = numberWidth + gapWidth;
     }

metadata/en-US/changelogs/1763.txt

@@ -6,6 +6,7 @@
 
 ### Next version
 
+* Added support for alphabetical lists (view only)
 * Report new messages in same thread when composing a new message
 * Use account categories for identities
 * Small improvements and minor bug fixes