Allow toggling checkboxes from within the preview #157 #287

Author: stefan-niedermann

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/NotePreviewFragment.java

@@ -4,6 +4,7 @@
 import android.graphics.Typeface;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.text.TextUtils;
 import android.text.method.LinkMovementMethod;
 import android.util.TypedValue;
 import android.view.LayoutInflater;
@@ -35,6 +36,8 @@ public class NotePreviewFragment extends BaseNoteFragment {
 
     private NoteSQLiteOpenHelper db = null;
 
+    private String changedText;
+
     MarkdownProcessor markdownProcessor;
 
     @BindView(R.id.swiperefreshlayout)
@@ -71,17 +74,42 @@ public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         ButterKnife.bind(this, Objects.requireNonNull(getView()));
         markdownProcessor = new MarkdownProcessor(getActivity());
         markdownProcessor.factory(TextFactory.create());
-        markdownProcessor.config(MarkDownUtil.getMarkDownConfiguration(noteContent.getContext()).build());
+        markdownProcessor.config(
+                MarkDownUtil.getMarkDownConfiguration(noteContent.getContext())
+                        .setOnTodoClickCallback((view, line, lineNumber) -> {
+                                    String[] lines = TextUtils.split(note.getContent(), "\\r?\\n");
+                                    /*
+                                     * Workaround for a bug when checkbox is the last line:
+                                     * When (un)checking a checkbox which is in the last line, every time it gets toggled, the last character of the line gets lost.
+                                     */
+                                    if ((lines.length - 1) == lineNumber) {
+                                        if(lines[lineNumber].contains("- [ ]")) {
+                                            lines[lineNumber] = lines[lineNumber].replace("- [ ]", "- [x]");
+                                        } else {
+                                            lines[lineNumber] = lines[lineNumber].replace("- [x]", "- [ ]");
+                                        }
+
+                                    } else if (lines.length >= lineNumber) {
+                                        lines[lineNumber] = line;
+                                    }
+                                    changedText = TextUtils.join("\n", lines);
+                                    noteContent.setText(markdownProcessor.parse(changedText));
+                                    saveNote(null);
+                                    return line;
+                                }
+                        )
+                        .build());
         setActiveTextView(noteContent);
         noteContent.setText(markdownProcessor.parse(note.getContent()));
+        changedText = note.getContent();
         noteContent.setMovementMethod(LinkMovementMethod.getInstance());
 
         db = NoteSQLiteOpenHelper.getInstance(getActivity().getApplicationContext());
         // Pull to Refresh
         swipeRefreshLayout.setOnRefreshListener(() -> {
             if (db.getNoteServerSyncHelper().isSyncPossible()) {
                 swipeRefreshLayout.setRefreshing(true);
-                db.getNoteServerSyncHelper().addCallbackPull( new ICallback() {
+                db.getNoteServerSyncHelper().addCallbackPull(new ICallback() {
                     @Override
                     public void onFinish() {
                         noteContent.setText(markdownProcessor.parse(db.getNote(note.getAccountId(), note.getId()).getContent()));
@@ -108,6 +136,6 @@ public void onScheduled() {
 
     @Override
     protected String getContent() {
-        return note.getContent();
+        return changedText;
     }
 }