Use checkbox-emoji-replacement also in title and excerpt

app/src/test/java/android/text/TextUtils.java

-package android.text;
-
-import androidx.annotation.Nullable;
-
-import java.util.Iterator;
-
-public class TextUtils {
-
-    /**
-     * Returns a string containing the tokens joined by delimiters.
-     *
-     * @param delimiter a CharSequence that will be inserted between the tokens. If null, the string
-     *     "null" will be used as the delimiter.
-     * @param tokens an array objects to be joined. Strings will be formed from the objects by
-     *     calling object.toString(). If tokens is null, a NullPointerException will be thrown. If
-     *     tokens is empty, an empty string will be returned.
-     */
-    public static String join(CharSequence delimiter, Iterable<?> tokens) {
-        final Iterator<?> it = tokens.iterator();
-        if (!it.hasNext()) {
-            return "";
-        }
-        final StringBuilder sb = new StringBuilder();
-        sb.append(it.next());
-        while (it.hasNext()) {
-            sb.append(delimiter);
-            sb.append(it.next());
-        }
-        return sb.toString();
-    }
-
-    /**
-     * Returns true if the string is null or 0-length.
-     * @param str the string to be examined
-     * @return true if str is null or zero length
-     */
-    public static boolean isEmpty(@Nullable CharSequence str) {
-        return str == null || str.length() == 0;
-    }
-}

markdown/src/androidTest/java/it/niedermann/android/markdown/MarkdownUtilTest.java

@@ -660,5 +660,8 @@ public class MarkdownUtilTest extends TestCase {
         assertEquals("Title", MarkdownUtil.removeMarkdown("# Title"));
         assertEquals("Aufzählung", MarkdownUtil.removeMarkdown("* Aufzählung"));
 //        assertEquals("Foo Link Bar", MarkdownUtil.removeMarkdown("Foo [Link](https://example.com) Bar"));
+
+        assertFalse(MarkdownUtil.removeMarkdown("- [ ] Test").contains("- [ ]"));
+        assertTrue(MarkdownUtil.removeMarkdown("- [ ] Test").endsWith("Test"));
     }
 }
\ No newline at end of file

markdown/src/main/java/it/niedermann/android/markdown/MarkdownUtil.java

@@ -75,7 +75,8 @@ public class MarkdownUtil {
         return parseCompat(markdownProcessor, replaceCheckboxesWithEmojis(content));
     }
 
-    private static CharSequence replaceCheckboxesWithEmojis(String content) {
+    @NonNull
+    private static CharSequence replaceCheckboxesWithEmojis(@NonNull String content) {
         return runForEachCheckbox(content, (line) -> {
             for (EListType listType : EListType.values()) {
                 if (checkboxCheckedEmoji != null) {
@@ -95,7 +96,7 @@ public class MarkdownUtil {
         final String[] uncheckedEmojis;
         // Seriously what the fuck, Samsung?
         // https://emojipedia.org/ballot-box-with-x/
-        if(Build.MANUFACTURER != null && Build.MANUFACTURER.toLowerCase().contains("samsung")) {
+        if (Build.MANUFACTURER != null && Build.MANUFACTURER.toLowerCase().contains("samsung")) {
             checkedEmojis = new String[]{"✅", "☑️", "✔️"};
             uncheckedEmojis = new String[]{"❌", "\uD83D\uDD32️", "☐️"};
         } else {
@@ -116,6 +117,7 @@ public class MarkdownUtil {
     /**
      * Performs the given {@param map} function for each line which contains a checkbox
      */
+    @NonNull
     private static CharSequence runForEachCheckbox(@NonNull String markdownString, @NonNull Function<String, String> map) {
         final String[] lines = markdownString.split("\n");
         boolean isInFencedCodeBlock = false;
@@ -432,7 +434,7 @@ public class MarkdownUtil {
     }
 
     /**
-     * Strips all Markdown from the given String
+     * Strips all Markdown from {@param s} and replaces checkboxes with emojis.
      *
      * @param s Markdown string
      * @return Plain text string
@@ -441,13 +443,13 @@ public class MarkdownUtil {
     public static String removeMarkdown(@Nullable String s) {
         if (s == null)
             return "";
-        String result = s;
-        result = PATTERN_LISTS.matcher(result).replaceAll("");
-        result = PATTERN_HEADINGS.matcher(result).replaceAll("$1");
-        result = PATTERN_HEADING_LINE.matcher(result).replaceAll("");
-        result = PATTERN_EMPHASIS.matcher(result).replaceAll("$2");
-        result = PATTERN_SPACE_1.matcher(result).replaceAll("");
-        result = PATTERN_SPACE_2.matcher(result).replaceAll("");
-        return result;
+        s = replaceCheckboxesWithEmojis(s).toString();
+        s = PATTERN_LISTS.matcher(s).replaceAll("");
+        s = PATTERN_HEADINGS.matcher(s).replaceAll("$1");
+        s = PATTERN_HEADING_LINE.matcher(s).replaceAll("");
+        s = PATTERN_EMPHASIS.matcher(s).replaceAll("$2");
+        s = PATTERN_SPACE_1.matcher(s).replaceAll("");
+        s = PATTERN_SPACE_2.matcher(s).replaceAll("");
+        return s;
     }
 }